all publications

@incollection{antonio_jose_g_busson_embedding_2020,
	location = {Cham},
	title = {Embedding Deep Learning Models into Hypermedia Applications},
	isbn = {978-3-030-35102-1},
	url = {https://doi.org/10.1007/978-3-030-35102-1_4},
	abstract = {Deep learning research has allowed significant advances in several areas of multimedia, especially in tasks related to speech processing, hearing, and computational vision. Particularly, recent usage scenarios in hypermedia domain already use such deep learning tasks to build applications that are sensitive to its media content semantics. However, the development of such scenarios is usually done from scratch. In particular, current hypermedia standards such as {HTML} do not fully support such kind of development. To support such development, we propose that a hypermedia language should be extended to support: (1) describe learning using structured media datasets; (2) recognize content semantics of the media elements in presentation time; (3) use the recognized semantics elements as events in during the multimedia. To illustrate our approach, we extended the {NCL} language, and its model {NCM}, to support such features. {NCL} (Nested Context Language) is the declarative language for developing interactive applications for Brazilian Digital {TV} and an {ITU}-T Recommendation for {IPTV} services. As a result of the work, it is presented a usage scenario to highlight how the extended {NCL} supports the development of content-aware hypermedia presentations, attesting the expressiveness and applicability of the model.},
	pages = {91--111},
	booktitle = {Special Topics in Multimedia, {IoT} and  Web Technologies},
	publisher = {Springer International Publishing},
	author = {{Antonio José G. Busson} and {Álan Livio V. Guedes} and {Sérgio Colcher} and {Ruy Luiz Milidiú} and {Edward Hermann Haeusler}},
	editor = {Roesler, Valter and Barrére, Eduardo and Willrich, Roberto},
	urlyear = {2020},
	year = {2020},
	langid = {english},
}

Deep learning research has allowed significant advances in several areas of multimedia, especially in tasks related to speech processing, hearing, and computational vision. Particularly, recent usage scenarios in hypermedia domain already use such deep learning tasks to build applications that are sensitive to its media content semantics. However, the development of such scenarios is usually done from scratch. In particular, current hypermedia standards such as HTML do not fully support such kind of development. To support such development, we propose that a hypermedia language should be extended to support: (1) describe learning using structured media datasets; (2) recognize content semantics of the media elements in presentation time; (3) use the recognized semantics elements as events in during the multimedia. To illustrate our approach, we extended the NCL language, and its model NCM, to support such features. NCL (Nested Context Language) is the declarative language for developing interactive applications for Brazilian Digital TV and an ITU-T Recommendation for IPTV services. As a result of the work, it is presented a usage scenario to highlight how the extended NCL supports the development of content-aware hypermedia presentations, attesting the expressiveness and applicability of the model.

@inproceedings{mendes_authoring_2020,
	location = {London, {UK}},
	title = {An Authoring Model for Interactive 360 videos},
	abstract = {The recent availability of consumer-level head-mounted displays and omnidirectional cameras has been driving an explosion of 360 video content.   Transforming the original recorded 360 video content in meaningful interactive multimedia presentations that support viewers in tasks such  as learning, entertainment, and telepresence, however, is nottrivial and requires new tools.  Such tools must provide an easy-to-use authoring model for  the integration of different media objects and active user interface elements. In this paper, based on real-world scenarios for interactive 360 videos, we gather a set of requirements and propose a declarative authoring model to support authors in the process of designing and creating 360-degree interactive video presentations.  As a case study, we implement different applications showing the expressiveness and completeness of the model in the scope of the target scenarios.},
	eventtitle = {{ICME} 2020 Workshop: Tools for Creating {XR} Media Experiences},
	booktitle = {Proceedings of {ICME} 2020 Workshop: Tools for Creating {XR} Media Experiences},
	author = {Mendes, Paulo R. C. and Guedes, Alan Livio and Moraes, Daniel de Sousa and Azevedo, Roberto G. de A. and Colcher, Sérgio},
	year = {2020},
	keywords = {virtual reality, Media, user interfaces, 360-degree interactive video presentations, 360-degree video, active user interface elements, authoring, cameras, consumer-level head-mounted displays, declarative authoring model, helmet mounted displays, interactive multimedia presentations, interactive video, multimedia computing, Navigation, omnidirectional cameras, Omnidirectional video, Solid modeling, Three-dimensional displays, Timing, Two dimensional displays, Videos},
}

The recent availability of consumer-level head-mounted displays and omnidirectional cameras has been driving an explosion of 360 video content. Transforming the original recorded 360 video content in meaningful interactive multimedia presentations that support viewers in tasks such as learning, entertainment, and telepresence, however, is nottrivial and requires new tools. Such tools must provide an easy-to-use authoring model for the integration of different media objects and active user interface elements. In this paper, based on real-world scenarios for interactive 360 videos, we gather a set of requirements and propose a declarative authoring model to support authors in the process of designing and creating 360-degree interactive video presentations. As a case study, we implement different applications showing the expressiveness and completeness of the model in the scope of the target scenarios.

@inproceedings{busson_video_2020,
	title = {Video Quality Enhancement Using Deep Learning-Based Prediction Models for Quantized {DCT} Coefficients in {MPEG} I-frames},
	booktitle = {2020 {IEEE} International Symposium on Multimedia ({ISM})},
	author = {Busson, Antonio {JG} and Mendes, Paulo {RC} and Moraes, Daniel de S and da Veiga, Álvaro M and Guedes, Álan {LV} and Colcher, Sérgio},
	year = {2020},
}

@inproceedings{busson_decoder-side_2020,
	location = {New York, {NY}, {USA}},
	title = {Decoder-Side Quality Enhancement of {JPEG} Images Using Deep Learning-Based Prediction Models for Quantized {DCT} Coefficients},
	isbn = {978-1-4503-8196-3},
	url = {https://doi.org/10.1145/3428658.3430966},
	doi = {10.1145/3428658.3430966},
	series = {{WebMedia} '20},
	abstract = {Many recent works have successfully applied some types of Convolutional Neural Networks ({CNNs}) to reduce the noticeable distortion resulting from the lossy {JPEG} compression technique. Most of them are built upon the processing made on the spatial domain. In this work, we propose a {JPEG} image decoder that is purely based on the frequency-to-frequency domain: it reads the quantized {DCT} coefficients received from a low-quality image bitstream and, using a deep learning-based model, predicts the missing coefficients in order to recompose the same image with enhanced quality. In experiments with two datasets, our best model was able to improve from images with quantized {DCT} coefficients corresponding to a Qualityz Factor ({QF}) of 10 to enhanced quality images with {QF} slightly higher than 20.},
	pages = {129--136},
	booktitle = {Proceedings of the Brazilian Symposium on Multimedia and the Web},
	publisher = {Association for Computing Machinery},
	author = {Busson, Antonio José G. and Mendes, Paulo Renato C. and de S. Moraes, Daniel and da Veiga, Álvaro Mário G. and Colcher, Sérgio and Guedes, Álan Lívio V.},
	urlyear = {2020},
	year = {2020},
	keywords = {Convolutional Neural Networks, {DCT}, Deep learning, Image compression, {JPEG}},
}

Many recent works have successfully applied some types of Convolutional Neural Networks (CNNs) to reduce the noticeable distortion resulting from the lossy JPEG compression technique. Most of them are built upon the processing made on the spatial domain. In this work, we propose a JPEG image decoder that is purely based on the frequency-to-frequency domain: it reads the quantized DCT coefficients received from a low-quality image bitstream and, using a deep learning-based model, predicts the missing coefficients in order to recompose the same image with enhanced quality. In experiments with two datasets, our best model was able to improve from images with quantized DCT coefficients corresponding to a Qualityz Factor (QF) of 10 to enhanced quality images with QF slightly higher than 20.

@article{vieira_listeningtv_2020,
	title = {{ListeningTV}: Accessible Video using Interactive Audio Descriptions},
	rights = {Copyright (c)},
	issn = {2596-1683},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/13065},
	doi = {10.5753/webmedia_estendido.2020.13065},
	shorttitle = {{ListeningTV}},
	abstract = {Resumo
					People with visual impairments suffer from the incapacity to understand contextual information in videos, such as the place where characters are, or any other non-spoken actions in general. Some content creators address this issue by providing a secondary audio to describe such information, called Audio Descriptions ({ADs}). How- ever, some works in the literature have highlighted that people with visual impairment are usually not able to completely understand scene changes based only on characters’ voices or traditional {ADs}. Moreover, traditional {ADs} do not completely describe some of the important visual information, such as the background scenery (e.g. colors, furniture) and characters’ details (e.g. blond woman using a red dress). In this work, we propose incrementing the traditional {AD} techniques with the usage of interactive video features present in {TV} systems. More precisely, the proposed interactivity enables users to access specialized {AD} for different visual information (e.g., scene, scenario, character). To support the development of such interactive content, we present an application template, which helps to create the final interactive-enhanced video application. Asa proof of concept for our approach, we created an interactive {AD} for an independent video mainly composed of visual information, with only a few talks.},
	pages = {71--74},
	journaltitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Vieira, Alex de Souza and Guedes, Álan Lívio V. and Moraes, Daniel de Sousa and Madeira, Lucas Ribeiro and Colcher, Sérgio and Neto, Carlos de S. Soares},
	urlyear = {2020},
	year = {2020},
	langid = {portuguese},
	note = {Conference Name: Anais Estendidos do {XXVI} Simpósio Brasileiro de Sistemas Multimídia e Web
Publisher: {SBC}},
}

Resumo People with visual impairments suffer from the incapacity to understand contextual information in videos, such as the place where characters are, or any other non-spoken actions in general. Some content creators address this issue by providing a secondary audio to describe such information, called Audio Descriptions (ADs). How- ever, some works in the literature have highlighted that people with visual impairment are usually not able to completely understand scene changes based only on characters’ voices or traditional ADs. Moreover, traditional ADs do not completely describe some of the important visual information, such as the background scenery (e.g. colors, furniture) and characters’ details (e.g. blond woman using a red dress). In this work, we propose incrementing the traditional AD techniques with the usage of interactive video features present in TV systems. More precisely, the proposed interactivity enables users to access specialized AD for different visual information (e.g., scene, scenario, character). To support the development of such interactive content, we present an application template, which helps to create the final interactive-enhanced video application. Asa proof of concept for our approach, we created an interactive AD for an independent video mainly composed of visual information, with only a few talks.

@article{mendes_shaping_2020,
	title = {Shaping the Video Conferences of Tomorrow With {AI}},
	rights = {Copyright (c)},
	issn = {2596-1683},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/13082},
	doi = {10.5753/webmedia_estendido.2020.13082},
	abstract = {Resumo
					Before the {COVID}-19 pandemic, video was already one of the main media used on the internet. During the pandemic, video conferencing services became even more important, coming to be one of the main instruments to enable most social and professional human activities. Given the social distancing policies, people are spending more time using these online services for working, learning, and also for leisure activities. Videoconferencing software became the standard communication for home-office and remote learning. Nevertheless, there are still a lot of issues to be addressed on these platforms, and many different aspects to be reexamined or investigated, such as ethical and user-experience issues, just to name a few. We argue that many of the current state-of-the-art techniques of Artificial Intelligence ({AI}) may help on enhancing video collabo- ration services, particularly the methods based on Deep Learning such as face and sentiment analyses, and video classification. In this paper, we present a future vision about how {AI} techniques may contribute to this upcoming videoconferencing-age.},
	pages = {165--168},
	journaltitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Mendes, Paulo Renato C. and Vieira, Eduardo S. and Freitas, Pedro Vinicius A. de and Busson, Antonio José G. and Guedes, Álan Lívio V. and Neto, Carlos de Salles Soares and Colcher, Sérgio},
	urlyear = {2020},
	year = {2020},
	langid = {portuguese},
	note = {Conference Name: Anais Estendidos do {XXVI} Simpósio Brasileiro de Sistemas Multimídia e Web
Publisher: {SBC}},
}

Resumo Before the COVID-19 pandemic, video was already one of the main media used on the internet. During the pandemic, video conferencing services became even more important, coming to be one of the main instruments to enable most social and professional human activities. Given the social distancing policies, people are spending more time using these online services for working, learning, and also for leisure activities. Videoconferencing software became the standard communication for home-office and remote learning. Nevertheless, there are still a lot of issues to be addressed on these platforms, and many different aspects to be reexamined or investigated, such as ethical and user-experience issues, just to name a few. We argue that many of the current state-of-the-art techniques of Artificial Intelligence (AI) may help on enhancing video collabo- ration services, particularly the methods based on Deep Learning such as face and sentiment analyses, and video classification. In this paper, we present a future vision about how AI techniques may contribute to this upcoming videoconferencing-age.

@inproceedings{costa_towards_2020,
	title = {Towards Neural-Symbolic {AI} for Media Understanding},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/13083},
	doi = {10.5753/webmedia_estendido.2020.13083},
	abstract = {Resumo
					Methods based on Machine Learning have become state-of-the-art in various segments of computing, especially in the fields of computer vision, speech recognition, and natural language processing. Such methods, however, generally work best when applied to specific tasks in specific domains where large training datasets are available. This paper presents an overview of the state-of-the-art in the area of Deep Learning for Multimedia Content Analysis (image, audio, and video), and describe recent works that propose The integration of deep learning with symbolic {AI} reasoning. We draw a picture of the future by discussing envisaged use cases that address media understanding gaps which can be solved by the integration of machine learning and symbolic {AI}, the so-called Neuro-Symbolic integration.},
	pages = {169--172},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Costa, Polyana B. and Marques, Guilherme and Serra, Arhur C. and Moraes, Daniel de S. and Busson, Antonio J. G. and Guedes, Álan L. V. and Lima, Guilherme and Colcher, Sérgio},
	urlyear = {2020},
	year = {2020},
	langid = {portuguese},
	note = {Conference Name: Anais Estendidos do {XXVI} Simpósio Brasileiro de Sistemas Multimídia e Web
Publisher: {SBC}},
}

Resumo Methods based on Machine Learning have become state-of-the-art in various segments of computing, especially in the fields of computer vision, speech recognition, and natural language processing. Such methods, however, generally work best when applied to specific tasks in specific domains where large training datasets are available. This paper presents an overview of the state-of-the-art in the area of Deep Learning for Multimedia Content Analysis (image, audio, and video), and describe recent works that propose The integration of deep learning with symbolic AI reasoning. We draw a picture of the future by discussing envisaged use cases that address media understanding gaps which can be solved by the integration of machine learning and symbolic AI, the so-called Neuro-Symbolic integration.

@article{pinto_relacionando_2020,
	title = {Relacionando Modelagem de Tópicos e Classificação de Sentimentos para Análise de Mensagens do Twitter Durante a Pandemia da {COVID}-19},
	rights = {Copyright (c)},
	issn = {2596-1683},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/13064},
	doi = {10.5753/webmedia_estendido.2020.13064},
	abstract = {Resumo
					In 2020, {COVID}-19 pandemic is one of the most talked-about subjects on social networks. This subject has generated discussions of great importance about politics, economics, medical advances, people’s awareness, preventive techniques, etc. Using sentiment analysis and topic modeling techniques, in this paper, we aim to present an analysis of the messages from the social network Twitter during the pandemic of {COVID}-19. For this, we use a tweets dataset to train a sentiment classifier and then use the {NMF} algorithm to perform the interest topic generation.},
	pages = {61--64},
	journaltitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Pinto, Matheus Adler Soares and Junior, Antonio Fernando Lavareda Jacob and Busson, Antonio José G. and Colcher, Sérgio},
	urlyear = {2020},
	year = {2020},
	langid = {portuguese},
	note = {Conference Name: Anais Estendidos do {XXVI} Simpósio Brasileiro de Sistemas Multimídia e Web
Publisher: {SBC}},
}

Resumo In 2020, COVID-19 pandemic is one of the most talked-about subjects on social networks. This subject has generated discussions of great importance about politics, economics, medical advances, people’s awareness, preventive techniques, etc. Using sentiment analysis and topic modeling techniques, in this paper, we aim to present an analysis of the messages from the social network Twitter during the pandemic of COVID-19. For this, we use a tweets dataset to train a sentiment classifier and then use the NMF algorithm to perform the interest topic generation.

@article{gomes_agata_2020,
	title = {Á{GATA}: um chatbot para difusão de práticas para Educação Ambiental},
	rights = {Copyright (c)},
	issn = {2596-1683},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/13068},
	doi = {10.5753/webmedia_estendido.2020.13068},
	shorttitle = {Á{GATA}},
	abstract = {Resumo
					Instant messaging apps have billions of monthly active users, which made this environment a good medium for purposes other than communication, such as education. In this context, one of the most appropriate technologies to encourage learning in these applications is chatbots. They consist of conversational applications that make use of artificial intelligence and natural language processing to interact with the user in a similar way to a human. In this scenario, this article presents the {AGATE} a chatbot developed for the Environmental Management Office ({AGA} / {UEMA}) in order to disseminate knowledge on environmental education, focusing on the problems of water and energy waste. The chatbot was developed for Telegram through the {pyTelegramBotAPI} implementation. In addition, conversation flows were created using {DialogFlow}. A multidisciplinary team composed of 14 people participated in the evaluation of the project, with a greater participation of professionals in the field of Biology. The initial results focused on the user experience were satisfactory.},
	pages = {85--89},
	journaltitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Gomes, Bruno Rocha and Jr, Antonio Fernando Lavareda Jacob and Pinto, Ivan de Jesus Pereira and Colcher, Sérgio},
	urlyear = {2020},
	year = {2020},
	langid = {portuguese},
	note = {Conference Name: Anais Estendidos do {XXVI} Simpósio Brasileiro de Sistemas Multimídia e Web
Publisher: {SBC}},
}

Resumo Instant messaging apps have billions of monthly active users, which made this environment a good medium for purposes other than communication, such as education. In this context, one of the most appropriate technologies to encourage learning in these applications is chatbots. They consist of conversational applications that make use of artificial intelligence and natural language processing to interact with the user in a similar way to a human. In this scenario, this article presents the AGATE a chatbot developed for the Environmental Management Office (AGA / UEMA) in order to disseminate knowledge on environmental education, focusing on the problems of water and energy waste. The chatbot was developed for Telegram through the pyTelegramBotAPI implementation. In addition, conversation flows were created using DialogFlow. A multidisciplinary team composed of 14 people participated in the evaluation of the project, with a greater participation of professionals in the field of Biology. The initial results focused on the user experience were satisfactory.

@article{henriques_prior_2020,
	title = {Prior Flow Variational Autoencoder: A density estimation model for Non-Intrusive Load Monitoring},
	url = {http://arxiv.org/abs/2011.14870},
	shorttitle = {Prior Flow Variational Autoencoder},
	abstract = {Non-Intrusive Load Monitoring ({NILM}) is a computational technique to estimate the power loads' appliance-by-appliance from the whole consumption measured by a single meter. In this paper, we propose a conditional density estimation model, based on deep neural networks, that joins a Conditional Variational Autoencoder with a Conditional Invertible Normalizing Flow model to estimate the individual appliance's power demand. The resulting model is called Prior Flow Variational Autoencoder or, for simplicity {PFVAE}. Thus, instead of having one model per appliance, the resulting model is responsible for estimating the power demand, appliance-by-appliance, at once. We train and evaluate our proposed model in a publicly available dataset composed of power demand measures from a poultry feed factory located in Brazil. The proposed model's quality is evaluated by comparing the obtained normalized disaggregation error ({NDE}) and signal aggregated error ({SAE}) with the previous work values on the same dataset. Our proposal achieves highly competitive results, and for six of the eight machines belonging to the dataset, we observe consistent improvements that go from 28\% up to 81\% in {NDE} and from 27\% up to 86\% in {SAE}.},
	journaltitle = {{arXiv}:2011.14870 [cs]},
	author = {Henriques, Luis Felipe M. O. and Morgan, Eduardo and Colcher, Sergio and Milidiú, Ruy Luiz},
	urlyear = {2021},
	year = {2020},
	eprinttype = {arxiv},
	eprint = {2011.14870},
	keywords = {Computer Science - Artificial Intelligence, Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning},
}

Non-Intrusive Load Monitoring (NILM) is a computational technique to estimate the power loads' appliance-by-appliance from the whole consumption measured by a single meter. In this paper, we propose a conditional density estimation model, based on deep neural networks, that joins a Conditional Variational Autoencoder with a Conditional Invertible Normalizing Flow model to estimate the individual appliance's power demand. The resulting model is called Prior Flow Variational Autoencoder or, for simplicity PFVAE. Thus, instead of having one model per appliance, the resulting model is responsible for estimating the power demand, appliance-by-appliance, at once. We train and evaluate our proposed model in a publicly available dataset composed of power demand measures from a poultry feed factory located in Brazil. The proposed model's quality is evaluated by comparing the obtained normalized disaggregation error (NDE) and signal aggregated error (SAE) with the previous work values on the same dataset. Our proposal achieves highly competitive results, and for six of the eight machines belonging to the dataset, we observe consistent improvements that go from 28% up to 81% in NDE and from 27% up to 86% in SAE.

@inproceedings{de_oliveira_stocks_2020,
	location = {Cham},
	title = {Stocks Clustering Based on Textual Embeddings for Price Forecasting},
	isbn = {978-3-030-61380-8},
	doi = {10.1007/978-3-030-61380-8_45},
	series = {Lecture Notes in Computer Science},
	abstract = {Forecasting stock market prices is a hard task. The main reason for that is due to the fact that its environment is highly dynamic, intrinsically complex, and chaotic. Traditional economic theories suggest that trying to forecast short-term stock price movements is a wasted effort because the market is influenced by several external events and its behavior approximates a random walk. Recent studies that address the problem of stock market forecasting usually create specific prediction models for the price behavior of a single stock. In this work we propose a technique to predict price movements based on similar stock sets. Our goal is to build a model to identify whether the price tends to bullishness or bearishness in the near future, considering stock information from similar sets based on two sources of information: historical stock data and Google Trends news. Firstly, the proposed study applies a method to identify similar stock sets and then creates a forecasting model based on a {LSTM} (long short-term memory) for these sets. More specifically, two experiments were conducted: (1) using the K-Means algorithm to identify similar stock sets and then using a {LSTM} neural network to forecast stock price movements for these stock sets; (2) using the {DBSCAN} (Density-based spatial clustering) algorithm to identify similar stock sets and then using the same {LSTM} neural network to forecast stock price movements. The study was conducted over 51 stocks of the Brazilian stock market. The results show that the use of an algorithm to identify stock clusters yields an improvement of approximately 7\% in accuracy and f1-score and 8\% in recall and precision when compared to models for a single stock.},
	pages = {665--678},
	booktitle = {Intelligent Systems},
	publisher = {Springer International Publishing},
	author = {de Oliveira, André D. C. M. and Pinto, Pedro F. A. and Colcher, Sergio},
	editor = {Cerri, Ricardo and Prati, Ronaldo C.},
	year = {2020},
	langid = {english},
	keywords = {Forecasting time series, Machine learning, Stock market},
}

Forecasting stock market prices is a hard task. The main reason for that is due to the fact that its environment is highly dynamic, intrinsically complex, and chaotic. Traditional economic theories suggest that trying to forecast short-term stock price movements is a wasted effort because the market is influenced by several external events and its behavior approximates a random walk. Recent studies that address the problem of stock market forecasting usually create specific prediction models for the price behavior of a single stock. In this work we propose a technique to predict price movements based on similar stock sets. Our goal is to build a model to identify whether the price tends to bullishness or bearishness in the near future, considering stock information from similar sets based on two sources of information: historical stock data and Google Trends news. Firstly, the proposed study applies a method to identify similar stock sets and then creates a forecasting model based on a LSTM (long short-term memory) for these sets. More specifically, two experiments were conducted: (1) using the K-Means algorithm to identify similar stock sets and then using a LSTM neural network to forecast stock price movements for these stock sets; (2) using the DBSCAN (Density-based spatial clustering) algorithm to identify similar stock sets and then using the same LSTM neural network to forecast stock price movements. The study was conducted over 51 stocks of the Brazilian stock market. The results show that the use of an algorithm to identify stock clusters yields an improvement of approximately 7% in accuracy and f1-score and 8% in recall and precision when compared to models for a single stock.

@article{busson_seismic_2020,
	title = {Seismic Shot Gather Noise Localization Using a Multi-Scale Feature-Fusion-Based Neural Network},
	url = {http://arxiv.org/abs/2005.03626},
	abstract = {Deep learning-based models, such as convolutional neural networks, have advanced various segments of computer vision. However, this technology is rarely applied to seismic shot gather noise localization problem. This letter presents an investigation on the effectiveness of a multi-scale feature-fusion-based network for seismic shot-gather noise localization. Herein, we describe the following: (1) the construction of a real-world dataset of seismic noise localization based on 6,500 seismograms; (2) a multi-scale feature-fusion-based detector that uses the {MobileNet} combined with the Feature Pyramid Net as the backbone; and (3) the Single Shot multi-box detector for box classification/regression. Additionally, we propose the use of the Focal Loss function that improves the detector's prediction accuracy. The proposed detector achieves an {AP}@0.5 of 78.67{\textbackslash}\% in our empirical evaluation.},
	journaltitle = {{arXiv}:2005.03626 [cs]},
	author = {Busson, Antonio José G. and Colcher, Sérgio and Milidiú, Ruy Luiz and Dias, Bruno Pereira and Bulcão, André},
	urlyear = {2021},
	year = {2020},
	eprinttype = {arxiv},
	eprint = {2005.03626},
	keywords = {Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning},
}

Deep learning-based models, such as convolutional neural networks, have advanced various segments of computer vision. However, this technology is rarely applied to seismic shot gather noise localization problem. This letter presents an investigation on the effectiveness of a multi-scale feature-fusion-based network for seismic shot-gather noise localization. Herein, we describe the following: (1) the construction of a real-world dataset of seismic noise localization based on 6,500 seismograms; (2) a multi-scale feature-fusion-based detector that uses the MobileNet combined with the Feature Pyramid Net as the backbone; and (3) the Single Shot multi-box detector for box classification/regression. Additionally, we propose the use of the Focal Loss function that improves the detector's prediction accuracy. The proposed detector achieves an AP@0.5 of 78.67\% in our empirical evaluation.

@inproceedings{freitas_deep_2020,
	title = {A Deep Learning Approach to Detect Pornography Videos in Educational Repositories},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/sbie/article/view/12881},
	doi = {10.5753/cbie.sbie.2020.1253},
	abstract = {Resumo
					A large number of videos are uploaded on educational platforms every minute. Those platforms are responsible for any sensitive media uploaded by their users. An automated detection system to identify pornographic content could assist human workers by pre-selecting suspicious videos. In this paper, we propose a multimodal approach to adult content detection. We use two Deep Convolutional Neural Networks to extract high-level features from both image and audio sources of a video. Then, we concatenate those features and evaluate the performance of classifiers on a set of mixed educational and pornographic videos. We achieve an F1-score of 95.67\% on the educational and adult videos set and an F1-score of 94\% on our test subset for the pornographic class.},
	pages = {1253--1262},
	booktitle = {Anais do Simpósio Brasileiro de Informática na Educação},
	author = {Freitas, Pedro V. A. de and Busson, Antonio J. G. and Guedes, Álan L. V. and Colcher, Sérgio},
	urlyear = {2021},
	year = {2020},
	langid = {english},
	note = {Conference Name: Anais do {XXXI} Simpósio Brasileiro de Informática na Educação
Publisher: {SBC}},
}

Resumo A large number of videos are uploaded on educational platforms every minute. Those platforms are responsible for any sensitive media uploaded by their users. An automated detection system to identify pornographic content could assist human workers by pre-selecting suspicious videos. In this paper, we propose a multimodal approach to adult content detection. We use two Deep Convolutional Neural Networks to extract high-level features from both image and audio sources of a video. Then, we concatenate those features and evaluate the performance of classifiers on a set of mixed educational and pornographic videos. We achieve an F1-score of 95.67% on the educational and adult videos set and an F1-score of 94% on our test subset for the pornographic class.

@article{mendes_clustering-based_2020,
	title = {A Clustering-Based Method for Automatic Educational Video Recommendation Using Deep Face-Features of Lecturers},
	url = {http://arxiv.org/abs/2010.04676},
	abstract = {Discovering and accessing specific content within educational video bases is a challenging task, mainly because of the abundance of video content and its diversity. Recommender systems are often used to enhance the ability to find and select content. But, recommendation mechanisms, especially those based on textual information, exhibit some limitations, such as being error-prone to manually created keywords or due to imprecise speech recognition. This paper presents a method for generating educational video recommendation using deep face-features of lecturers without identifying them. More precisely, we use an unsupervised face clustering mechanism to create relations among the videos based on the lecturer's presence. Then, for a selected educational video taken as a reference, we recommend the ones where the presence of the same lecturers is detected. Moreover, we rank these recommended videos based on the amount of time the referenced lecturers were present. For this task, we achieved a {mAP} value of 99.165\%.},
	journaltitle = {{arXiv}:2010.04676 [cs]},
	author = {Mendes, Paulo R. C. and Vieira, Eduardo S. and Guedes, Álan L. V. and Busson, Antonio J. G. and Colcher, Sérgio},
	urlyear = {2021},
	year = {2020},
	eprinttype = {arxiv},
	eprint = {2010.04676},
	keywords = {Computer Science - Machine Learning, Computer Science - Multimedia},
}

Discovering and accessing specific content within educational video bases is a challenging task, mainly because of the abundance of video content and its diversity. Recommender systems are often used to enhance the ability to find and select content. But, recommendation mechanisms, especially those based on textual information, exhibit some limitations, such as being error-prone to manually created keywords or due to imprecise speech recognition. This paper presents a method for generating educational video recommendation using deep face-features of lecturers without identifying them. More precisely, we use an unsupervised face clustering mechanism to create relations among the videos based on the lecturer's presence. Then, for a selected educational video taken as a reference, we recommend the ones where the presence of the same lecturers is detected. Moreover, we rank these recommended videos based on the amount of time the referenced lecturers were present. For this task, we achieved a mAP value of 99.165%.

@article{guedes_future_2020,
	title = {Future Vision of Interactive and Intelligent {TV} Systems using Edge {AI}},
	issn = {2446-9246},
	url = {https://www.set.org.br/ijbe/ed6/Artigo4.pdf},
	doi = {http://dx.doi.org/10.18580/setijbe.2020.4},
	author = {Guedes, Álan L.V. and Busson, Antonio J.G. and João Paulo Navarro and Colcher, Sérgio},
	urlyear = {2021},
	year = {2020},
}

@inproceedings{mendes_cluster-matching-based_2020,
	location = {New York, {NY}, {USA}},
	title = {A Cluster-Matching-Based Method for Video Face Recognition},
	isbn = {978-1-4503-8196-3},
	url = {https://doi.org/10.1145/3428658.3430967},
	abstract = {Face recognition systems are present in many modern solutions and thousands of applications in our daily lives. However, current solutions are not easily scalable, especially when it comes to the addition of new targeted people. We propose a cluster-matching-based approach for face recognition in video. In our approach, we use unsupervised learning to cluster the faces present in both the dataset and targeted videos selected for face recognition. Moreover, we design a cluster matching heuristic to associate clusters in both sets that is also capable of identifying when a face belongs to a non-registered person. Our method has achieved a recall of 99.435\% and a precision of 99.131\% in the task of video face recognition. Besides performing face recognition, it can also be used to determine the video segments where each person is present.},
	pages = {97--104},
	booktitle = {Proceedings of the Brazilian Symposium on Multimedia and the Web},
	publisher = {Association for Computing Machinery},
	author = {Mendes, Paulo Renato C. and Busson, Antonio José G. and Colcher, Sérgio and Schwabe, Daniel and Guedes, Álan Lívio V. and Laufer, Carlos},
	urlyear = {2021},
	year = {2020},
	keywords = {Clustering, Deep learning, Face recognition},
}

Face recognition systems are present in many modern solutions and thousands of applications in our daily lives. However, current solutions are not easily scalable, especially when it comes to the addition of new targeted people. We propose a cluster-matching-based approach for face recognition in video. In our approach, we use unsupervised learning to cluster the faces present in both the dataset and targeted videos selected for face recognition. Moreover, we design a cluster matching heuristic to associate clusters in both sets that is also capable of identifying when a face belongs to a non-registered person. Our method has achieved a recall of 99.435% and a precision of 99.131% in the task of video face recognition. Besides performing face recognition, it can also be used to determine the video segments where each person is present.

@article{alan_l_v_guedes_avancos_2020,
	title = {Avanços do middleware Ginga para {TV} 2.5},
	issn = {1980-2331},
	url = {https://set.org.br/news-revista-da-set/artigo-news-revista-da-set/avancos-do-middleware-ginga-para-tv-2-5/},
	author = {{Álan L. V. Guedes} and {Sérgio Colcher}},
	year = {2020},
}

@inproceedings{pinto_pvbr-recog_2019,
	title = {{PVBR}-Recog: A {YOLOv}3-based Brazilian Automatic License Plate Recognition Tool},
	shorttitle = {{PVBR}-Recog},
	pages = {121--124},
	booktitle = {Anais Estendidos do {XXV} Simpósio Brasileiro de Sistemas Multimídia e Web},
	publisher = {{SBC}},
	author = {Pinto, Pedro Ferreira Alves and Busson, Antonio José G. and De Melo, João P. Forny and Colcher, Sérgio and Milidiú, Ruy Luiz},
	year = {2019},
}

@inproceedings{moraes_proposal_2019,
	title = {A Proposal of Educational Video Gamification as a Service},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8153},
	doi = {10.5753/webmedia_estendido.2019.8153},
	abstract = {Online and hybrid courses are characterized by the use of technologies teaching support and student-centered methodologies. In particular, the use of content authoring, storage, distribution, and presentation technologies has contributed to the emergence of Virtual Learning Environments ({VLEs}), such as Moodle, and {MOOCS} (Massive Open Online Course), such as {EdX}. However, those types of courses still suffers from problems involving student engagement. To improve this engagement, this article discusses the proposal of a Deep Learning as a Service ({DLaS}) called {EVGAS} (Educational Video Gamification As a Service). More precisely, {EVGAS} is a service for recommending and gamifying activities in existing educational {VLE} videos. First, {EVGAS} uses Deep Learning techniques to classify videos from an {AVA}. Then, it accesses repositories of activities, such as Khan Academy and {UVA} {OnlineJudge}, in order to select activities according to the topics classified from the videos. Finally, {EVGAS} adds {VLA} activities and gamification. It allows the teacher to monitor student progress, including in relation to each topic of the video. As a result, this paper presents high level requirements and an {EVGAS} Mockup.},
	pages = {151--154},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Moraes, Daniel de Sousa and Guedes, Álan L. V. and Busson, Antonio J. G. and Neto, Carlos de Salles Soares and Colcher, Sérgio},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

Online and hybrid courses are characterized by the use of technologies teaching support and student-centered methodologies. In particular, the use of content authoring, storage, distribution, and presentation technologies has contributed to the emergence of Virtual Learning Environments (VLEs), such as Moodle, and MOOCS (Massive Open Online Course), such as EdX. However, those types of courses still suffers from problems involving student engagement. To improve this engagement, this article discusses the proposal of a Deep Learning as a Service (DLaS) called EVGAS (Educational Video Gamification As a Service). More precisely, EVGAS is a service for recommending and gamifying activities in existing educational VLE videos. First, EVGAS uses Deep Learning techniques to classify videos from an AVA. Then, it accesses repositories of activities, such as Khan Academy and UVA OnlineJudge, in order to select activities according to the topics classified from the videos. Finally, EVGAS adds VLA activities and gamification. It allows the teacher to monitor student progress, including in relation to each topic of the video. As a result, this paper presents high level requirements and an EVGAS Mockup.

@inproceedings{jesus_cnn-based_2019,
	location = {San Diego, {CA}, {USA}},
	title = {A {CNN}-Based Tool to Index Emotion on Anime Character Stickers},
	rights = {All rights reserved},
	isbn = {978-1-72815-606-4},
	url = {https://ieeexplore.ieee.org/document/8959002/},
	doi = {10.1109/ISM46123.2019.00071},
	eventtitle = {2019 {IEEE} International Symposium on Multimedia ({ISM})},
	pages = {319--3193},
	booktitle = {2019 {IEEE} International Symposium on Multimedia ({ISM})},
	publisher = {{IEEE}},
	author = {Jesus, Ivan and Cardoso, Jessica and Busson, Antonio Jose G. and Guedes, Alan Livio and Colcher, Sergio and Milidiu, Ruy Luiz},
	urlyear = {2020},
	year = {2019},
}

@inproceedings{guedes_subjective_2019,
	title = {Subjective Evaluation of 360-degree Sensory Experiences},
	doi = {10.1109/MMSP.2019.8901743},
	abstract = {Traditionally, most multimedia content has been developed to stimulate two of the human senses, i.e., sight and hearing. Due to recent technological advancements, however, innovative services have been developed that provide more realistic, immersive, and engaging experiences to the audience. Omnidirectional (i.e., 360-degree) video, for instance, is becoming increasingly popular. It allows the viewer to navigate the full 360-degree view of a scene from a specific point. In particular, when consumed through head-mounted displays, 360-degree videos provide increased immersion and sense of presence. The use of multi-sensory effects —e.g., wind, vibration, and scent— has also been explored by recent work, which allows an improved experience by stimulating other users' senses through sensory effects that go beyond the audiovisual content. Understanding how these additional multi-sensory effects affect the users' perceived quality of experience ({QoE}) in 360-degree, however, is still an open research problem at large. As a step to better understand the {QoE} of immersive sensory experiences, this paper presents a testbed and discusses a user-focused study on a scenario in which the user is immersed in the 360-degree video content and is stimulated through additional sensory effects. Quantitative results indicated that the sensorial effects can considerably increase the sense of presence of 360-degree videos. Qualitative results provided us with a better view of the limitations of current technologies and interesting insights such as the users' sense of surprise.},
	eventtitle = {2019 {IEEE} 21st International Workshop on Multimedia Signal Processing ({MMSP})},
	pages = {1--6},
	booktitle = {2019 {IEEE} 21st International Workshop on Multimedia Signal Processing ({MMSP})},
	author = {Guedes, Álan L. V. and de A. Azevedo, Roberto G. and Frossard, Pascal and Colcher, Sérgio and Junqueira Barbosa, Simone Diniz},
	year = {2019},
	note = {{ISSN}: 2163-3517},
}

Traditionally, most multimedia content has been developed to stimulate two of the human senses, i.e., sight and hearing. Due to recent technological advancements, however, innovative services have been developed that provide more realistic, immersive, and engaging experiences to the audience. Omnidirectional (i.e., 360-degree) video, for instance, is becoming increasingly popular. It allows the viewer to navigate the full 360-degree view of a scene from a specific point. In particular, when consumed through head-mounted displays, 360-degree videos provide increased immersion and sense of presence. The use of multi-sensory effects —e.g., wind, vibration, and scent— has also been explored by recent work, which allows an improved experience by stimulating other users' senses through sensory effects that go beyond the audiovisual content. Understanding how these additional multi-sensory effects affect the users' perceived quality of experience (QoE) in 360-degree, however, is still an open research problem at large. As a step to better understand the QoE of immersive sensory experiences, this paper presents a testbed and discusses a user-focused study on a scenario in which the user is immersed in the 360-degree video content and is stimulated through additional sensory effects. Quantitative results indicated that the sensorial effects can considerably increase the sense of presence of 360-degree videos. Qualitative results provided us with a better view of the limitations of current technologies and interesting insights such as the users' sense of surprise.

@article{de_freitas_multimodal_2019,
	title = {A Multimodal {CNN}-based Tool to Censure Inappropriate Video Scenes},
	rights = {All rights reserved},
	url = {http://arxiv.org/abs/1911.03974},
	abstract = {Due to the extensive use of video-sharing platforms and services for their storage, the amount of such media on the internet has become massive. This volume of data makes it difficult to control the kind of content that may be present in such video files. One of the main concerns regarding the video content is if it has an inappropriate subject matter, such as nudity, violence, or other potentially disturbing content. More than telling if a video is either appropriate or inappropriate, it is also important to identify which parts of it contain such content, for preserving parts that would be discarded in a simple broad analysis. In this work, we present a multimodal{\textasciitilde}(using audio and image features) architecture based on Convolutional Neural Networks ({CNNs}) for detecting inappropriate scenes in video files. In the task of classifying video files, our model achieved 98.95{\textbackslash}\% and 98.94{\textbackslash}\% of F1-score for the appropriate and inappropriate classes, respectively. We also present a censoring tool that automatically censors inappropriate segments of a video file.},
	journaltitle = {{arXiv}:1911.03974 [cs]},
	author = {de Freitas, Pedro V. A. and Mendes, Paulo R. C. and Santos, Gabriel N. P. dos and Busson, Antonio José G. and Guedes, Álan Livio and Colcher, Sérgio and Milidiú, Ruy Luiz},
	year = {2019},
}

Due to the extensive use of video-sharing platforms and services for their storage, the amount of such media on the internet has become massive. This volume of data makes it difficult to control the kind of content that may be present in such video files. One of the main concerns regarding the video content is if it has an inappropriate subject matter, such as nudity, violence, or other potentially disturbing content. More than telling if a video is either appropriate or inappropriate, it is also important to identify which parts of it contain such content, for preserving parts that would be discarded in a simple broad analysis. In this work, we present a multimodal~(using audio and image features) architecture based on Convolutional Neural Networks (CNNs) for detecting inappropriate scenes in video files. In the task of classifying video files, our model achieved 98.95\% and 98.94\% of F1-score for the appropriate and inappropriate classes, respectively. We also present a censoring tool that automatically censors inappropriate segments of a video file.

@inproceedings{de_freitas_ergonomic_2019,
	location = {New York, {NY}, {USA}},
	title = {An Ergonomic Evaluation Method Using a Mobile Depth Sensor and Pose Estimation},
	rights = {All rights reserved},
	isbn = {978-1-4503-6763-9},
	url = {http://doi.acm.org/10.1145/3323503.3349550},
	doi = {10.1145/3323503.3349550},
	series = {{WebMedia} '19},
	abstract = {An ergonomic evaluation is an observation of a person in order to identify musculoskeletal disorders ({WMSDs}) caused by prolonged or repeated harmful poses that a person adopts during work tasks. Nowadays, an ergonomist or other health professional perform such evaluations based on a set of posture rules and checklists, which can be subjective and thus lead to erroneous risk classifications. Moreover, this professional usually perform such evaluation in the patient work environment. In order to make those evaluations more objective and concise we propose a evaluation method using a mobile depth sensor. Different from other methods based in fixed depth sensors (e.g. Kinect), our method enable professionals easily perform it in the patient work environment. More precisely, we present an experiment that uses a smartphone from Google's Tango project and the Ovako Working Posture Analysing System ({OWAS}) method. To evaluate our approach, we also perform the ergonomic assessment using the Kinect sensor, a device that has a good reliability in the automated ergonomic evaluation. Both evaluations involved a set of 34 poses performed by 3 volunteers and annotated by an ergonomist. The Kinect has achieved accuracy of 57,08\% on torso classification, 58,33\% for arms and 25,00\% for legs positions. While the approach using the mobile depth sensor has achieved 35,41\% on torso classification, 93,05\% for arms and 66,23\% for legs positions on the same set of poses. Although the small sample, the achieved results may indicate that our mobile depth sensor approach can be as viable as methods based fixed depth sensor.},
	pages = {445--452},
	booktitle = {Proceedings of the 25th Brazillian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {de Freitas, Pedro Vinicius A. and Mendes, Paulo Renato C. and Busson, Antonio José G. and Guedes, Álan Livio V. and Silva, Giovanni Lucca F. da and de Paiva, Anselmo Cardoso and Colcher, Sérgio},
	urlyear = {2019},
	year = {2019},
}

An ergonomic evaluation is an observation of a person in order to identify musculoskeletal disorders (WMSDs) caused by prolonged or repeated harmful poses that a person adopts during work tasks. Nowadays, an ergonomist or other health professional perform such evaluations based on a set of posture rules and checklists, which can be subjective and thus lead to erroneous risk classifications. Moreover, this professional usually perform such evaluation in the patient work environment. In order to make those evaluations more objective and concise we propose a evaluation method using a mobile depth sensor. Different from other methods based in fixed depth sensors (e.g. Kinect), our method enable professionals easily perform it in the patient work environment. More precisely, we present an experiment that uses a smartphone from Google's Tango project and the Ovako Working Posture Analysing System (OWAS) method. To evaluate our approach, we also perform the ergonomic assessment using the Kinect sensor, a device that has a good reliability in the automated ergonomic evaluation. Both evaluations involved a set of 34 poses performed by 3 volunteers and annotated by an ergonomist. The Kinect has achieved accuracy of 57,08% on torso classification, 58,33% for arms and 25,00% for legs positions. While the approach using the mobile depth sensor has achieved 35,41% on torso classification, 93,05% for arms and 66,23% for legs positions on the same set of poses. Although the small sample, the achieved results may indicate that our mobile depth sensor approach can be as viable as methods based fixed depth sensor.

@inproceedings{guedes_modeling_2019,
	location = {New York, {NY}, {USA}},
	title = {Modeling Multimodal-Multiuser Interactions in Declarative Multimedia Languages},
	rights = {All rights reserved},
	isbn = {978-1-4503-6887-2},
	url = {http://doi.acm.org/10.1145/3342558.3345400},
	doi = {10.1145/3342558.3345400},
	series = {{DocEng} '19},
	abstract = {Recent advances in hardware and software technologies have given rise to a new class of human-computer interfaces that both explores multiple modalities and allows for multiple collaborating users. When compared to the development of traditional single-user {WIMP} (windows, icons, menus, pointer)-based applications, however, applications supporting the seamless integration of multimodal-multiuser interactions bring new specification and runtime requirements. With the aim of assisting the specification of multimedia applications that integrate multimodal-multiuser interactions, this paper: (1) proposes the {MMAM} (Multimodal-Multiuser Authoring Model); (2) presents three different instantiations of it (in {NCL}, {HTML}, and a block-based syntax); and (3) evaluates the proposed model through a task-based user study. {MMAM} enables programmers to design and ponder different solutions for applications with multimodal-multiuser requirements. The proposed instantiations served as proofs of concept about the feasibility of our model implementation and provided the basis for practical experimentation, while the performed user study focused on capturing evidence of both the user understanding and the user acceptance of the proposed model. We asked developers to perform tasks using {MMAM} and then answer a {TAM} (Technology Acceptance Model)-based questionnaire focused on both the model and its instances. As results, the study indicates that the participants easily understood the model (most of them performed the required tasks with minor or no errors) and found it both useful and easy to use. 94.47\% of the participants gave positive answers to the block-based representation {TAM} questions, whereas 75.17\% gave positive answers to the instances-related questions.},
	pages = {11:1--11:10},
	booktitle = {Proceedings of the {ACM} Symposium on Document Engineering 2019},
	publisher = {{ACM}},
	author = {Guedes, Álan L. V. and de A. Azevedo, Roberto G. and Colcher, Sérgio and Barbosa, Simone D. J.},
	urlyear = {2019},
	year = {2019},
}

Recent advances in hardware and software technologies have given rise to a new class of human-computer interfaces that both explores multiple modalities and allows for multiple collaborating users. When compared to the development of traditional single-user WIMP (windows, icons, menus, pointer)-based applications, however, applications supporting the seamless integration of multimodal-multiuser interactions bring new specification and runtime requirements. With the aim of assisting the specification of multimedia applications that integrate multimodal-multiuser interactions, this paper: (1) proposes the MMAM (Multimodal-Multiuser Authoring Model); (2) presents three different instantiations of it (in NCL, HTML, and a block-based syntax); and (3) evaluates the proposed model through a task-based user study. MMAM enables programmers to design and ponder different solutions for applications with multimodal-multiuser requirements. The proposed instantiations served as proofs of concept about the feasibility of our model implementation and provided the basis for practical experimentation, while the performed user study focused on capturing evidence of both the user understanding and the user acceptance of the proposed model. We asked developers to perform tasks using MMAM and then answer a TAM (Technology Acceptance Model)-based questionnaire focused on both the model and its instances. As results, the study indicates that the participants easily understood the model (most of them performed the required tasks with minor or no errors) and found it both useful and easy to use. 94.47% of the participants gave positive answers to the block-based representation TAM questions, whereas 75.17% gave positive answers to the instances-related questions.

@incollection{roriz_junior_introduction_2019,
	edition = {1},
	title = {Introduction to Data Flow Processing: A Complex Event-Oriented Approach},
	rights = {All rights reserved},
	isbn = {978-85-7669-481-6},
	url = {https://sol.sbc.org.br/livros/index.php/sbc/catalog/view/32/125/305-1},
	shorttitle = {Introdução ao processamento de fluxo de dados},
	pages = {45--76},
	booktitle = {Minicursos do {XXV} Simpósio Brasileiro de Sistemas Multimídia e Web},
	publisher = {{SBC}},
	author = {Roriz Junior, Marcos and {Álan L. V. Guedes} and {Fernando B. V. Magalhães} and {Sérgio Colcher} and {Markus Endler}},
	urlyear = {2019},
	year = {2019},
}

@inproceedings{silva_using_2019,
	title = {Using Deep Learning to Recognize People by Face and Voice},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8143},
	doi = {10.5753/webmedia_estendido.2019.8143},
	abstract = {There are many ways to build a person identification system and those systems can be used for authentication and security. The latest phones for example, bring fingerprint readers to enhance the user experience. From our perspective on Neural Networkswe determine that Machine Learning is enough to guarantee someone’s identity without the need of any specific sensors other than a camera and a microphone. It is achievable with pictures of their face, sounds of their voice and Deep Learning. This work presents a study to build an application to allow biometric authentication using only multimedia and Deep Learning.},
	pages = {83--86},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Silva, Lucas Gomes da and Guedes, Álan L. V. and Colcher, Sérgio},
	year = {2019},
	langid = {portuguese},
}

There are many ways to build a person identification system and those systems can be used for authentication and security. The latest phones for example, bring fingerprint readers to enhance the user experience. From our perspective on Neural Networkswe determine that Machine Learning is enough to guarantee someone’s identity without the need of any specific sensors other than a camera and a microphone. It is achievable with pictures of their face, sounds of their voice and Deep Learning. This work presents a study to build an application to allow biometric authentication using only multimedia and Deep Learning.

@inproceedings{santos_deep_2019,
	location = {New York, {NY}, {USA}},
	title = {Deep Learning Methods for Video Understanding},
	rights = {All rights reserved},
	isbn = {978-1-4503-6763-9},
	url = {http://doi.acm.org/10.1145/3323503.3345029},
	doi = {10.1145/3323503.3345029},
	series = {{WebMedia} '19},
	abstract = {Methods based on Deep Learning became state-of-the-art in several Multimedia challenges. However, there is a gap of professionals to perform Deep Learning in the industry. Therefore, this tutorial aims to present the grounds and ways to develop applications that uses methods based on Deep Learning for video analysis tasks. Likewise, this tutorial is an opportunity for students and information technology professionals to qualify themselves. The main focus of this short course is to present fundamentals and technologies to develop such methods of {DL}.},
	pages = {21--23},
	booktitle = {Proceedings of the 25th Brazillian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Santos, Gabriel N. P. dos and de Freitas, Pedro V. A. and Busson, Antonio José G. and Guedes, Álan L. V. and Milidiú, Ruy and Colcher, Sérgio},
	urlyear = {2019},
	year = {2019},
}

Methods based on Deep Learning became state-of-the-art in several Multimedia challenges. However, there is a gap of professionals to perform Deep Learning in the industry. Therefore, this tutorial aims to present the grounds and ways to develop applications that uses methods based on Deep Learning for video analysis tasks. Likewise, this tutorial is an opportunity for students and information technology professionals to qualify themselves. The main focus of this short course is to present fundamentals and technologies to develop such methods of DL.

@article{rafael_diniz_ginga-enabled_2019,
	title = {A Ginga-enabled Digital Radio Mondiale Broadcasting Chain: Signaling and Definitions},
	volume = {19},
	rights = {All rights reserved},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/19_05_diniz.pdf},
	number = {5},
	journaltitle = {Technical Report from Department of Computer Science of {PUC}-Rio},
	author = {{Rafael Diniz} and {Alan L V Guedes} and {Sergio Colcher}},
	year = {2019},
}

@inproceedings{roriz_introduction_2019,
	location = {New York, {NY}, {USA}},
	title = {Introduction to Data Stream Processing: A Complex Event Processing Approach},
	rights = {All rights reserved},
	isbn = {978-1-4503-6763-9},
	url = {http://doi.acm.org/10.1145/3323503.3345028},
	doi = {10.1145/3323503.3345028},
	series = {{WebMedia} '19},
	shorttitle = {An Introduction to Data Stream Processing},
	abstract = {Most of information technologies courses are focused on exposing the traditional static data (e.g., {SGBD}) processing model and lack on presenting the data stream model. Such model can be applied to fields such as Internet of Things, busyness and finances, logistics and smart cities) of the industry. Complex Event Processing consists of a programming approach to handle Data Stream Processing. It provide primitives to process and detect the occurrence of patterns in data streams. This short course has the objective of presenting the complex event processing ({CEP}) programming model as a means of dealing with the specificities of data flows.},
	pages = {11--13},
	booktitle = {Proceedings of the 25th Brazillian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Roriz, Marcos and Magalhães, Fernando B. V. and Guedes, Álan L. V. and Colcher, Sérgio and Endler, Markus},
	urlyear = {2019},
	year = {2019},
}

Most of information technologies courses are focused on exposing the traditional static data (e.g., SGBD) processing model and lack on presenting the data stream model. Such model can be applied to fields such as Internet of Things, busyness and finances, logistics and smart cities) of the industry. Complex Event Processing consists of a programming approach to handle Data Stream Processing. It provide primitives to process and detect the occurrence of patterns in data streams. This short course has the objective of presenting the complex event processing (CEP) programming model as a means of dealing with the specificities of data flows.

@inproceedings{de_freitas_baseline_2019,
	location = {New York, {NY}, {USA}},
	title = {A Baseline for {NSFW} Video Detection in e-Learning Environments},
	rights = {All rights reserved},
	isbn = {978-1-4503-6763-9},
	url = {http://doi.acm.org/10.1145/3323503.3360625},
	doi = {10.1145/3323503.3360625},
	series = {{WebMedia} '19},
	abstract = {The broad use of video capture and services for its storage and transmission has enabled the production of a massive volume of video data. This usage presents a challenge in controlling the type of content that is loaded for these video storage services. The Internet slang {NSFW} (Not Safe For Work) is often used as a warning for media that contain inappropriate content, such as nudity, intense sexuality, violence, gore or other potentially disturbing subject matter. Convolutional Neural Network ({CNNs}) architectures, or {ConvNets}, have become the primary method used for audio-visual pattern recognition. In this work, we intend to: (1) create a {CNN} based model for video features extraction; And (2), validate these video features with baselines models for {NSFW} video classification using a multi-modal approach. In initial experimentation, our best model achieves a recall of 96.6\% for {NSFW} class.},
	pages = {357--360},
	booktitle = {Proceedings of the 25th Brazillian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {de Freitas, Pedro V. A. and Santos, Gabriel N. P. dos and Busson, Antonio J. G. and Guedes, Álan L. V. and Colcher, Sérgio},
	urlyear = {2019},
	year = {2019},
}

The broad use of video capture and services for its storage and transmission has enabled the production of a massive volume of video data. This usage presents a challenge in controlling the type of content that is loaded for these video storage services. The Internet slang NSFW (Not Safe For Work) is often used as a warning for media that contain inappropriate content, such as nudity, intense sexuality, violence, gore or other potentially disturbing subject matter. Convolutional Neural Network (CNNs) architectures, or ConvNets, have become the primary method used for audio-visual pattern recognition. In this work, we intend to: (1) create a CNN based model for video features extraction; And (2), validate these video features with baselines models for NSFW video classification using a multi-modal approach. In initial experimentation, our best model achieves a recall of 96.6% for NSFW class.

@inproceedings{guedes_h761_2019,
	title = {H.761 Support of an {SVG} Media Type},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8175},
	doi = {10.5753/webmedia_estendido.2019.8175},
	pages = {219--219},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Guedes, Alan L. V. and Colcher, Sergio},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

@inproceedings{guedes_h761_2019-1,
	title = {H.761 Support of a News input Node and a New "recognition" Node-Event to Enable Multimodal User Interactions},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8172},
	doi = {10.5753/webmedia_estendido.2019.8172},
	pages = {213--214},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Guedes, Alan L. V. and Colcher, Sergio},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

@inproceedings{guedes_h761_2019-2,
	title = {H.761 Support of a New Syntax to Refer {NCL}-Node-Properties Instead of the Current "Take It From There" Syntax},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8174},
	doi = {10.5753/webmedia_estendido.2019.8174},
	pages = {217--218},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Guedes, Alan L. V. and Colcher, Sergio},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

@inproceedings{guedes_h761_2019-3,
	title = {H.761 Support of a new {SigGen} Media Type to Enable Inaudible Sound Data Communication},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8173},
	doi = {10.5753/webmedia_estendido.2019.8173},
	pages = {215--216},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Guedes, Alan L. V. and Colcher, Sergio},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

@inproceedings{busson_h761_2019,
	title = {H.761 Support of a New concept Element and a New "recognition" Node-Event to Enable Deep Learning-based Analyses for Media-Nodes},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8171},
	doi = {10.5753/webmedia_estendido.2019.8171},
	pages = {211--212},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Busson, Antônio and Guedes, Alan L. V. and Colcher, Sergio},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

@inproceedings{guedes_h761_2019-4,
	title = {H.761 Support of a {DOM} Level 4 Core specification in {NCLua} scripts},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8170},
	doi = {10.5753/webmedia_estendido.2019.8170},
	pages = {209--209},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Guedes, Alan L. V. and Colcher, Sergio},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

@inproceedings{moraes_gamification_2019,
	title = {Gamification Analysis of a Virtual Learning Environment Based on Bartle Profiles},
	volume = {30},
	rights = {Direitos autorais 2019 Brazilian Symposium on Computers in Education (Simpósio Brasileiro de Informática na Educação - {SBIE})},
	url = {https://www.br-ie.org/pub/index.php/sbie/article/view/8819},
	doi = {10.5753/cbie.sbie.2019.912},
	abstract = {Lack of engagement has been one of the main factors for evasion in higher education courses, especially among the exact sciences ones. In Computer Science courses, the scenario does not differ from the others, placing it among the highest evasion rates. Given the change in the teaching-learning process caused by the introduction of technologies, one of the alternatives to soften this problem is the use of elements of games, a technique known as gamification. This work presents an analysis of the use of gamification in a virtual learning environment ({VLE}) for the learning of algorithms. In particular, this gamification focus on specific players profiles, based on Bartle taxonomy, named as killers, socializers, explorers and achievers. We also performed a controlled experiment involving 44 algorithms students. As results, we present indications that the selected and applied gamification elements were promising in promoting the engagement and motivation of the users.},
	pages = {912},
	booktitle = {Brazilian Symposium on Computers in Education (Simpósio Brasileiro de Informática na Educação - {SBIE})},
	author = {Moraes, Daniel de Sousa and Guedes, Alan and Castro, Vinícius Costa and Dias, Lukas Henrique and Neto, Carlos Soares},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

Lack of engagement has been one of the main factors for evasion in higher education courses, especially among the exact sciences ones. In Computer Science courses, the scenario does not differ from the others, placing it among the highest evasion rates. Given the change in the teaching-learning process caused by the introduction of technologies, one of the alternatives to soften this problem is the use of elements of games, a technique known as gamification. This work presents an analysis of the use of gamification in a virtual learning environment (VLE) for the learning of algorithms. In particular, this gamification focus on specific players profiles, based on Bartle taxonomy, named as killers, socializers, explorers and achievers. We also performed a controlled experiment involving 44 algorithms students. As results, we present indications that the selected and applied gamification elements were promising in promoting the engagement and motivation of the users.

@inproceedings{guedes_extending_2019,
	title = {Extending multimedia languages to support multimodal-multiuser interactions},
	rights = {Copyright (c)},
	url = {https://sol.sbc.org.br/index.php/webmedia_estendido/article/view/8125},
	doi = {10.5753/webmedia_estendido.2019.8125},
	pages = {5--8},
	booktitle = {Anais Estendidos do Simpósio Brasileiro de Sistemas Multimídia e Web ({WebMedia})},
	author = {Guedes, Álan L. V. and Barbosa, Simone D. J.},
	urlyear = {2019},
	year = {2019},
	langid = {portuguese},
}

@incollection{gabriel_n_p_dos_santos_deep_2019,
	edition = {1},
	title = {Deep Learning Based Methods for Video Analysis},
	rights = {All rights reserved},
	isbn = {978-85-7669-481-6},
	url = {https://sol.sbc.org.br/livros/index.php/sbc/catalog/view/32/127/307-1},
	pages = {119--166},
	booktitle = {Minicursos do {XXV} Simpósio Brasileiro de Sistemas Multimídia e Web},
	publisher = {{SBC}},
	author = {{Gabriel N. P. dos Santos} and {Pedro V. A. de Freitas} and {Antonio José G. Busson} and {Álan L. V. Guedes} and {Sérgio Colcher} and {Ruy L. Milidiú}},
	urlyear = {2019},
	year = {2019},
}

@report{damasceno_entrevistas_2018,
	location = {Rio de Janeiro},
	title = {Entrevistas e mapeamento sistemático sobre análise de logs de interação de alunos em ambientes virtuais de aprendizagem},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/18_08_damasceno.pdf},
	pages = {11},
	number = {8},
	institution = {Pontifícia Universidade Católica do Rio de Janeiro},
	author = {Damasceno, André Luiz de Brandão and Ribeiro, Dalai dos Santos and Colcher, Sérgio and Barbosa, Simone D. J.},
	year = {2018},
}

@article{damasceno_videoviz_2018,
	title = {{VideoViz} - Uma proposta de ferramenta de visualização de logs de interação em players de vídeo},
	abstract = {The usage of technologies for content authoring, storage, distribution and presentation supported the arise of Virtual Learning Environments ({VLEs}) such as Moodle and {MOOCs} (e.g., Udacity, Coursera, {EdX}). All students’ interaction in these environments can be stored in logs. For instance, video is one of the resources has a greater focus on {VLEs}. In this paper, we present a state-of-theart overview of interaction analysis on video players. We noticed that teachers would like to know how and when students interact with videos. In order to fill this gap, we propose {VideoViz}, a tool to analyse logs from interaction on video players.},
	pages = {4},
	journaltitle = {Anais do {XXIV} Simpósio Brasileiro de Sistemas Multimídia e Web: Workshop do {CT}-Vídeo (Comitê Técnico de Prospecção Tecnológica em Videocolaboração)},
	author = {Damasceno, André Luiz de B. and Guedes, Álan L. V. and Colcher, Sérgio and Barbosa, Simone D. J. and {Dilson J. L. Rabêlo} and Monier, Elza B.},
	year = {2018},
	langid = {portuguese},
}

The usage of technologies for content authoring, storage, distribution and presentation supported the arise of Virtual Learning Environments (VLEs) such as Moodle and MOOCs (e.g., Udacity, Coursera, EdX). All students’ interaction in these environments can be stored in logs. For instance, video is one of the resources has a greater focus on VLEs. In this paper, we present a state-of-theart overview of interaction analysis on video players. We noticed that teachers would like to know how and when students interact with videos. In order to fill this gap, we propose VideoViz, a tool to analyse logs from interaction on video players.

@inproceedings{rodrigo_c_m_santos_memory-bounded_2018,
	location = {New York, {NY}, {USA}},
	title = {A memory-bounded, deterministic and terminating semantics for the synchronous programming language {CéU}},
	isbn = {978-1-4503-5803-3},
	url = {http://doi.acm.org/10.1145/3211332.3211334},
	doi = {10.1145/3211332.3211334},
	series = {{LCTES} 2018},
	abstract = {Céu is a synchronous programming language for embedded soft real-time systems. It focuses on control-flow safety features, such as safe shared-memory concurrency and safe abortion of lines of execution, while enforcing memory bounded, deterministic, and terminating reactions to the environment. In this work, we present a small-step structural operational semantics for Céu and a proof that reactions have the properties enumerated above: that for a given arbitrary timeline of input events, multiple executions of the same program always react in bounded time and arrive at the same final finite memory state.},
	pages = {1--18},
	booktitle = {Proceedings of the 19th {ACM} {SIGPLAN}/{SIGBED} international conference on languages, compilers, and tools for embedded systems},
	publisher = {{ACM}},
	author = {{Rodrigo C. M. Santos} and Lima, Guilherme F. and Sant'Anna, Francisco and Ierusalimschy, Roberto and Haeusler, Edward H.},
	year = {2018},
}

Céu is a synchronous programming language for embedded soft real-time systems. It focuses on control-flow safety features, such as safe shared-memory concurrency and safe abortion of lines of execution, while enforcing memory bounded, deterministic, and terminating reactions to the environment. In this work, we present a small-step structural operational semantics for Céu and a proof that reactions have the properties enumerated above: that for a given arbitrary timeline of input events, multiple executions of the same program always react in bounded time and arrive at the same final finite memory state.

@inproceedings{dodsworth_dynamic_2018,
	title = {Dynamic Integration of Foreign-Language Parsers into an {NCL} Player},
	rights = {All rights reserved},
	doi = {10.1145/3243082.3243095},
	abstract = {We describe how we modified an {NCL} player to accept as input, in addition to {NCL} documents, Lua scripts. These Lua scripts evaluate to a table in a particular format, called {NCL}-ltab, which is a Lua table encoding of the {NCL} player’s internal model. One advantage of our modifications is that they allow the {NCL} parsing to occur in the Lua script, i.e., outside the formatter but integrated in its execution flow. The same applies for parsers of dialects of {NCL} or similar languages. Another advantage is that new parsers can be plugged dynamically into the formatter (if they are written in Lua or can be called from Lua). In this paper, we detail the internal model of the {NCL} player we are using and the {NCL}-ltab input format. To evaluate our proposal, we present two parser-integration use cases, one for {NCL} itself, using the {DietNCL} parsing toolkit, and another for {sNCL}, an alternative, user-friendlier syntax for {NCL}.},
	pages = {8},
	booktitle = {Proceedings of the 24st Brazilian Symposium on Multimedia and the Web},
	author = {Dodsworth, Jorge P and Terças, Lucas de Macêdo and Alan L. V. Guedes and Lima, Guilherme F. and Neto, Carlos de Salles Soares and Colcher, Sérgio},
	year = {2018},
	langid = {english},
}

We describe how we modified an NCL player to accept as input, in addition to NCL documents, Lua scripts. These Lua scripts evaluate to a table in a particular format, called NCL-ltab, which is a Lua table encoding of the NCL player’s internal model. One advantage of our modifications is that they allow the NCL parsing to occur in the Lua script, i.e., outside the formatter but integrated in its execution flow. The same applies for parsers of dialects of NCL or similar languages. Another advantage is that new parsers can be plugged dynamically into the formatter (if they are written in Lua or can be called from Lua). In this paper, we detail the internal model of the NCL player we are using and the NCL-ltab input format. To evaluate our proposal, we present two parser-integration use cases, one for NCL itself, using the DietNCL parsing toolkit, and another for sNCL, an alternative, user-friendlier syntax for NCL.

@inproceedings{nunes_towards_2018,
	title = {Towards Data Transmission Through Inaudible Sound in Ginga-{NCL}},
	rights = {All rights reserved},
	url = {https://portaldeconteudo.sbc.org.br/index.php/webmedia_estendido/article/download/4059/3999},
	doi = {https://doi.org/10.5753/webmedia.2018.4568},
	abstract = {In this paper, we report our efforts to add support for data transmission through inaudible sound to the Ginga-{NCL} Digital {TV} middleware. We present an algorithm for encoding a bitstream in an inaudible audio signal, and to do so reliably on consumergrade hardware. We also discuss two attempts to implement this algorithm in {NCL}, the language in which Ginga-{NCL} applications are written. The first attempt was to transmit prerecorded inaudible audio signals in a Ginga-{NCL}-compatible set-top-box. And the second attempt was to use {NCLua} to generate at runtime the inaudible audio signal. For the second attempt we extended {NCL} with a novel media object type, called {SigGen}, which can be used to generate arbitrary audio signals. In the paper, we describe in detail the implementation of {SigGen} and the result of these attempts.},
	pages = {4},
	booktitle = {Anais do {XXIII} Simpósio Brasileiro de Sistemas Multimídia e Web: Workshops e Pôsteres},
	author = {Nunes, João Victor G. de S. and Guedes, Álan L. V. and Lima, Guilherme F. and Colcher, Sérgio},
	year = {2018},
}

In this paper, we report our efforts to add support for data transmission through inaudible sound to the Ginga-NCL Digital TV middleware. We present an algorithm for encoding a bitstream in an inaudible audio signal, and to do so reliably on consumergrade hardware. We also discuss two attempts to implement this algorithm in NCL, the language in which Ginga-NCL applications are written. The first attempt was to transmit prerecorded inaudible audio signals in a Ginga-NCL-compatible set-top-box. And the second attempt was to use NCLua to generate at runtime the inaudible audio signal. For the second attempt we extended NCL with a novel media object type, called SigGen, which can be used to generate arbitrary audio signals. In the paper, we describe in detail the implementation of SigGen and the result of these attempts.

@inproceedings{busson_videorecognition_2018,
	title = {{VideoRecognition} - Uma proposta de serviço para reconhecimento de elementos de vídeo em larga escala},
	rights = {All rights reserved},
	abstract = {Deep Learning research has allowed significant advancement of various segments of multimedia, especially in tasks related to speech processing, hearing and computational vision. However, some video services are still focused only on the traditional use of media (capture, storage, transmission and presentation). In this paper, we discuss our ongoing research towards a {DLaS}, i.e. Deep Learning as a Service. This way, we present the state of art in video classification and recognition. Then we propose the {VideoRecognition} as {DLaS} to support the tasks such as: image classification and video scenes, object detection and facial recognition. We discuss the usage of the proposed service in the context of the video@{RNP} repository. Our main contributions consist on dicussussions over the state of art and it usage in nowdays multimedia services.},
	pages = {4},
	booktitle = {Proceedings of the 24st Brazilian Symposium on Multimedia and the Web: {CT}-Vídeo Workshop},
	author = {Busson, Antonio J G and Guedes, Álan L V and Santos, Gabriel N. P. dos and Neto, Carlos de Salles Soares and Milidiú, Ruy Luiz and Colcher, Sergio},
	year = {2018},
	langid = {portuguese},
}

Deep Learning research has allowed significant advancement of various segments of multimedia, especially in tasks related to speech processing, hearing and computational vision. However, some video services are still focused only on the traditional use of media (capture, storage, transmission and presentation). In this paper, we discuss our ongoing research towards a DLaS, i.e. Deep Learning as a Service. This way, we present the state of art in video classification and recognition. Then we propose the VideoRecognition as DLaS to support the tasks such as: image classification and video scenes, object detection and facial recognition. We discuss the usage of the proposed service in the context of the video@RNP repository. Our main contributions consist on dicussussions over the state of art and it usage in nowdays multimedia services.

@incollection{busson_desenvolvendo_2018,
	title = {Desenvolvendo Modelos de Deep Learning para Aplicações Multimídia no Tensorflow},
	isbn = {978-85-7669-455-7},
	url = {https://webmedia.org.br/wp-content/uploads/2018/10/LivroDeMinicursosWebMedia2018.pdf},
	abstract = {The availability of massive quantities of data, combined with increasing computational capabilities, makes it possible to develop more precise Machine Learning algorithms. These new tools provide advances in areas such as Natural Language Processing and Computer Vision, allowing efficient processing of images, text and audio. Now, cognitive functionalities, such as learning, recognition and detection, can be used in multimedia applications to create mechanisms beyond traditional capture, streaming and presentation uses. Methods based on Deep Learning became state-of-the-art in several Multimedia challenges. This short course presents the grounds and ways to develop models using Deep Learning. It prepares the participant to: (1) understand and develop models based on Deep Neural Networks, Convolutional Neural Networks ({CNN}), Recurrent Neural Networks, including {LSTM} and {GRU}; (2) apply the Deep Learning models to solve problems within the multimedia domain like Image Classification, Facial Recognition, Object Detection, Video Scenes Classification. The Python programming language is shown alongside {TensorFlow}, a package for developing Deep Learning models.},
	pages = {67--116},
	booktitle = {Anais do {XXIII} Simpósio Brasileiro de Sistemas Multimídia e Web: Minicursos},
	publisher = {{SBC}},
	author = {Busson, Antonio José G. and Figueiredo, Lucas C. and Santos, Gabriel P. dos and Damasceno, André Luiz de B. and Colcher, Sérgio and Milidiú, Ruy L.},
	year = {2018},
	langid = {portuguese},
}

The availability of massive quantities of data, combined with increasing computational capabilities, makes it possible to develop more precise Machine Learning algorithms. These new tools provide advances in areas such as Natural Language Processing and Computer Vision, allowing efficient processing of images, text and audio. Now, cognitive functionalities, such as learning, recognition and detection, can be used in multimedia applications to create mechanisms beyond traditional capture, streaming and presentation uses. Methods based on Deep Learning became state-of-the-art in several Multimedia challenges. This short course presents the grounds and ways to develop models using Deep Learning. It prepares the participant to: (1) understand and develop models based on Deep Neural Networks, Convolutional Neural Networks (CNN), Recurrent Neural Networks, including LSTM and GRU; (2) apply the Deep Learning models to solve problems within the multimedia domain like Image Classification, Facial Recognition, Object Detection, Video Scenes Classification. The Python programming language is shown alongside TensorFlow, a package for developing Deep Learning models.

@inproceedings{mendes_exploring_2018,
	location = {New York, {NY}, {USA}},
	title = {Exploring an {AR}-based user interface for authoring multimedia presentations},
	isbn = {978-1-4503-5769-2},
	url = {http://doi.acm.org/10.1145/3209280.3209534},
	doi = {10.1145/3209280.3209534},
	series = {{DocEng} '18},
	abstract = {This paper describes the {BumbAR} approach for composing multimedia presentations and evaluates it through a qualitative study based on the Technology Acceptance Model ({TAM}). The {BumbAR} proposal is based on the event-condition-action model of Nested Context Model ({NCM}) and explores the use of augmented reality and real-world objects (markers) as an innovative user interface to specify the behavior and relationships between the media objects in a presentation. The qualitative study aimed at measuring the users’ attitude towards using {BumbAR} and an augmented reality environment for authoring multimedia presentations. The results show that the participants found the {BumbAR} approach both useful and easy-to-use, while most of them (66,67\%) found the system more convenient than traditional desktop-based authoring tools.},
	pages = {9:1--9:9},
	booktitle = {Proceedings of the {ACM} symposium on document engineering 2018},
	publisher = {{ACM}},
	author = {Mendes, Paulo Renato Conceição and Azevedo, Roberto Gerson de Albuquerque and de Oliveira, Ruy Guilherme Silva and Soares Neto, Carlos de Salles},
	year = {2018},
}

This paper describes the BumbAR approach for composing multimedia presentations and evaluates it through a qualitative study based on the Technology Acceptance Model (TAM). The BumbAR proposal is based on the event-condition-action model of Nested Context Model (NCM) and explores the use of augmented reality and real-world objects (markers) as an innovative user interface to specify the behavior and relationships between the media objects in a presentation. The qualitative study aimed at measuring the users’ attitude towards using BumbAR and an augmented reality environment for authoring multimedia presentations. The results show that the participants found the BumbAR approach both useful and easy-to-use, while most of them (66,67%) found the system more convenient than traditional desktop-based authoring tools.

@inproceedings{busson_hypervideo_2017,
	location = {New York, {NY}, {USA}},
	title = {A hypervideo model for learning objects},
	isbn = {978-1-4503-4708-2},
	url = {http://doi.acm.org/10.1145/3078714.3078739},
	doi = {10.1145/3078714.3078739},
	series = {{HT} '17},
	abstract = {Learning Objects ({LOs}) are entities that can be used, reused, or referred during the teaching process. They are commonly embedded into documents that establish spatial and temporal relationships on their contents. Hypervideos {LOs} allow students to individualize their learning experience with non-linear browsing mechanisms and content adaptation. This paper presents a survey of features for a set of documents representing such {LOs} as well as desirable aspects that should be expressed during the authoring phase. Also, this paper presents a conceptual model that fits such requirements. The model is implemented by {SceneSync}, a domain specific language focused on the synchronization and temporal behavior of {LOs}. As a result of the work, we present a set of {LOs} specified in {SceneSync} and a discussion about the identified features, which confirm the expressiveness and applicability of the model.},
	pages = {245--253},
	booktitle = {Proceedings of the 28th {ACM} conference on hypertext and social media},
	publisher = {{ACM}},
	author = {Busson, Antonio José G. and Damasceno, André Luiz de B. and Azevedo, Roberto G. de A. and Neto, Carlos de Salles Soares and Lima, Thacyla de Sousa and Colcher, Sérgio},
	year = {2017},
}

Learning Objects (LOs) are entities that can be used, reused, or referred during the teaching process. They are commonly embedded into documents that establish spatial and temporal relationships on their contents. Hypervideos LOs allow students to individualize their learning experience with non-linear browsing mechanisms and content adaptation. This paper presents a survey of features for a set of documents representing such LOs as well as desirable aspects that should be expressed during the authoring phase. Also, this paper presents a conceptual model that fits such requirements. The model is implemented by SceneSync, a domain specific language focused on the synchronization and temporal behavior of LOs. As a result of the work, we present a set of LOs specified in SceneSync and a discussion about the identified features, which confirm the expressiveness and applicability of the model.

@incollection{colcher_projetos_2017,
	location = {Gramado, {RS}, Brazil},
	title = {Projetos atuais e visão de futuro do laboratório {TeleMídia}/{PUC}-Rio em videocolaboração},
	isbn = {978-85-7669-381-9},
	series = {Anais do {IV} {CT}-Vídeo. {WebMedia} '17},
	abstract = {Since the early 1990's, the {TeleMídia} laboratory of the Department of Informatics of {PUC}-Rio researches and trains people in the areas of multimedia and hypermedia, which include interactive videos and video collaboration as important subareas. This chapter presents the main research lines and projects of the laboratory and discusses the future vision of the authors about interactive videos and video collaboration.},
	pages = {207--232},
	booktitle = {O futuro da videocolaboração: perspectivas},
	publisher = {Sociedade Brasileira de Computação},
	author = {Colcher, Sérgio and Guedes, Álan Lívio Vasconcelos and Azevedo, Roberto Gerson de Albuquerque and Lima, Guilherme F. and Santos, Rodrigo Costa Mesquita and Busson, Antônio José Grandson},
	editor = {Ciuffo, Leandro and Roesler, Valter},
	year = {2017},
}

Since the early 1990's, the TeleMídia laboratory of the Department of Informatics of PUC-Rio researches and trains people in the areas of multimedia and hypermedia, which include interactive videos and video collaboration as important subareas. This chapter presents the main research lines and projects of the laboratory and discusses the future vision of the authors about interactive videos and video collaboration.

@incollection{de_brandao_damasceno_integrating_2017,
	location = {Cham},
	title = {Integrating participatory and interaction design of an authoring tool for learning objects involving a multidisciplinary team},
	isbn = {978-3-319-58634-2},
	url = {http://dx.doi.org/10.1007/978-3-319-58634-2₄1},
	abstract = {Traditional computer use in educational environments does not ensure learning improvement. Consequently, there is a global effort to make and provide more effective and efficient use of new multimedia resources and learning environments. Learning Objects ({LOs}) are entities, digital or not, which can be used or referenced during teaching. However, multimedia authoring of {LOs} is still complex and time consuming. In this paper we present a novel process integrating participatory and interaction design which we adopted in the development of an authoring tool involving a multidisciplinary team. As result, this methodology is used in the development of Cacuriá, a multimedia authoring tool for teachers with little or no programming skills to create {LOs}.},
	pages = {554--569},
	booktitle = {Design, user experience, and usability: Theory, methodology, and management: 6th international conference, {DUXU} 2017, held as part of {HCI} international 2017, vancouver, {BC}, canada, july 9-14, 2017, proceedings, part I},
	publisher = {Springer International Publishing},
	author = {de Brandão Damasceno, André Luiz and de Salles Soares Neto, Carlos and Barbosa, Simone Diniz Junqueira},
	editor = {Marcus, Aaron and Wang, Wentao},
	year = {2017},
}

Traditional computer use in educational environments does not ensure learning improvement. Consequently, there is a global effort to make and provide more effective and efficient use of new multimedia resources and learning environments. Learning Objects (LOs) are entities, digital or not, which can be used or referenced during teaching. However, multimedia authoring of LOs is still complex and time consuming. In this paper we present a novel process integrating participatory and interaction design which we adopted in the development of an authoring tool involving a multidisciplinary team. As result, this methodology is used in the development of Cacuriá, a multimedia authoring tool for teachers with little or no programming skills to create LOs.

@incollection{de_brandao_damasceno_lessons_2017,
	location = {Cham},
	title = {Lessons learned from evaluating an authoring tool for learning objects},
	isbn = {978-3-319-58509-3},
	url = {http://dx.doi.org/10.1007/978-3-319-58509-3₈},
	abstract = {Teachers and students often adopt technologies that allow new ways of teaching and learning, and multimedia resources such as slideshows, videos and games have been increasingly used in both distance and face-to-face instruction. These multimedia learning environments handle several media resources (e.g., video, image, text). One such environment is the multimedia authoring tool Cacuriá. Cacuriá allows teachers to create multimedia educational content for interactive {TV} and Web without requiring programming skills. In this paper we present a case study which was conducted to show how learning objects could be created using Cacuriá without requiring the user to previously know programming concepts. Finally, usability tests results show that Cacuriá can be used by teachers with effectiveness and consistency.},
	pages = {77--89},
	booktitle = {Learning and collaboration technologies. Novel learning ecosystems: 4th international conference, {LCT} 2017, held as part of {HCI} international 2017, vancouver, {BC}, canada, july 9-14, 2017, proceedings, part I},
	publisher = {Springer International Publishing},
	author = {de Brandão Damasceno, André Luiz and de Salles Soares Neto, Carlos and Barbosa, Simone Diniz Junqueira},
	editor = {Zaphiris, Panayiotis and Ioannou, Andri},
	year = {2017},
}

Teachers and students often adopt technologies that allow new ways of teaching and learning, and multimedia resources such as slideshows, videos and games have been increasingly used in both distance and face-to-face instruction. These multimedia learning environments handle several media resources (e.g., video, image, text). One such environment is the multimedia authoring tool Cacuriá. Cacuriá allows teachers to create multimedia educational content for interactive TV and Web without requiring programming skills. In this paper we present a case study which was conducted to show how learning objects could be created using Cacuriá without requiring the user to previously know programming concepts. Finally, usability tests results show that Cacuriá can be used by teachers with effectiveness and consistency.

@article{guedes_extending_2017,
	title = {Extending multimedia languages to support multimodal user interactions},
	volume = {76},
	issn = {1573-7721},
	url = {http://dx.doi.org/10.1007/s11042-016-3846-8},
	doi = {10.1007/s11042-016-3846-8},
	abstract = {Historically, the Multimedia community research has focused on output modalities, through studies on timing and multimedia processing. The Multimodal Interaction community, on the other hand, has focused on user-generated modalities, through studies on Multimodal User Interfaces ({MUI}). In this paper, aiming to assist the development of multimedia applications with {MUIs}, we propose the integration of concepts from those two communities in a unique high-level programming framework. The framework integrates user modalities —both user-generated (e.g., speech, gestures) and user-consumed (e.g., audiovisual, haptic)— in declarative programming languages for the specification of interactive multimedia applications. To illustrate our approach, we instantiate the framework in the {NCL} (Nested Context Language) multimedia language. {NCL} is the declarative language for developing interactive applications for Brazilian Digital {TV} and an {ITU}-T Recommendation for {IPTV} services. To help evaluate our approach, we discuss a usage scenario and implement it as an {NCL} application extended with the proposed multimodal features. Also, we compare the expressiveness of the multimodal {NCL} against existing multimedia and multimodal languages, for both input and output modalities.},
	pages = {5691--5720},
	number = {4},
	journaltitle = {Multimedia Tools and Applications},
	author = {Guedes, Álan Lívio Vasconcelos and Azevedo, Roberto Gerson de Albuquerque and Barbosa, Simone Diniz Junqueira},
	year = {2017},
}

Historically, the Multimedia community research has focused on output modalities, through studies on timing and multimedia processing. The Multimodal Interaction community, on the other hand, has focused on user-generated modalities, through studies on Multimodal User Interfaces (MUI). In this paper, aiming to assist the development of multimedia applications with MUIs, we propose the integration of concepts from those two communities in a unique high-level programming framework. The framework integrates user modalities —both user-generated (e.g., speech, gestures) and user-consumed (e.g., audiovisual, haptic)— in declarative programming languages for the specification of interactive multimedia applications. To illustrate our approach, we instantiate the framework in the NCL (Nested Context Language) multimedia language. NCL is the declarative language for developing interactive applications for Brazilian Digital TV and an ITU-T Recommendation for IPTV services. To help evaluate our approach, we discuss a usage scenario and implement it as an NCL application extended with the proposed multimodal features. Also, we compare the expressiveness of the multimodal NCL against existing multimedia and multimodal languages, for both input and output modalities.

@inproceedings{lima_converting_2017,
	location = {New York, {NY}, {USA}},
	title = {Converting {NCL} documents to smix and fixing their semantics and interpretation in the process},
	isbn = {978-1-4503-5096-9},
	url = {http://doi.acm.org/10.1145/3126858.3126876},
	doi = {10.1145/3126858.3126876},
	series = {{WebMedia} '17},
	abstract = {In this paper, we describe the conversion of {NCL} to Smix and discuss its main implications. {NCL} is a declarative language for the specification of interactive multimedia presentations which was adopted by the {ITU}-T H.761 recommendation for interoperable {IPTV} services. Smix is an {NCL}-like, domain-specific language with a similar purpose, but with a much simpler and more precise semantics. By implementing {NCL} over Smix, we bring to the former the notions of reaction and execution instants, and with them some benefits. From a practical perspective, we fix the semantics of the converted documents, get a leaner {NCL} player (the Smix interpreter), and simplify further conversions and interpretations. From a systems-design perspective, the structured conversion of {NCL} to Smix helps us tame the complexity of mapping the user-oriented constructs of {NCL} into the machine-oriented primitives and operations that realize them as a multimedia application. In the paper, we present both {NCL} and Smix, discuss related work on document conversion, and detail the proposed conversion process together with its prototype implementation.},
	pages = {109--116},
	booktitle = {Proceedings of the 23rd Brazillian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Lima, Guilherme F. and Azevedo, Roberto Gerson de Albuquerque and Colcher, Sérgio and Haeusler, Edward Hermann},
	year = {2017},
}

In this paper, we describe the conversion of NCL to Smix and discuss its main implications. NCL is a declarative language for the specification of interactive multimedia presentations which was adopted by the ITU-T H.761 recommendation for interoperable IPTV services. Smix is an NCL-like, domain-specific language with a similar purpose, but with a much simpler and more precise semantics. By implementing NCL over Smix, we bring to the former the notions of reaction and execution instants, and with them some benefits. From a practical perspective, we fix the semantics of the converted documents, get a leaner NCL player (the Smix interpreter), and simplify further conversions and interpretations. From a systems-design perspective, the structured conversion of NCL to Smix helps us tame the complexity of mapping the user-oriented constructs of NCL into the machine-oriented primitives and operations that realize them as a multimedia application. In the paper, we present both NCL and Smix, discuss related work on document conversion, and detail the proposed conversion process together with its prototype implementation.

@inproceedings{pereira_gals_2017,
	title = {A {GALS} approach for programming distributed interactive multimedia applications},
	isbn = {978-85-7669-380-2},
	url = {http://www.inf.ufrgs.br/webmedia2017/wp-content/anaiswebmedia/files/AnaisWebMedia2017Workshops&Posteres.pdf},
	series = {Webmedia '17},
	booktitle = {In anais do {XXIII} simpósio brasileiro de sistemas multimídia e web: Workshops e pôsteres},
	author = {Pereira, Danne Makleyston Gomes and Silva, Francisco José da Silva e and Neto, Carlos de Salles Soares and Guedes, Álan Livio Vasconcelos and Santos, Rodrigo C. M. and Sant’Anna, Francisco and Rodriguez, Noemi},
	year = {2017},
}

@inproceedings{pereira_middleware_2017,
	title = {A middleware perspective for integrating ginga-{NCL} applications with the internet of things},
	isbn = {978-85-7669-380-2},
	url = {http://www.inf.ufrgs.br/webmedia2017/wp-content/anaiswebmedia/files/AnaisWebMedia2017Workshops&Posteres.pdf},
	series = {Webmedia '17},
	booktitle = {In anais do {XXIII} simpósio brasileiro de sistemas multimídia e web: Workshops e pôsteres},
	author = {Pereira, Danne Makleyston Gomes and Silva, Francisco José da Silva e and Neto, Carlos de Salles Soares and Guedes, Álan Livio Vasconcelos},
	year = {2017},
}

@inproceedings{pinto_fabulas_2017,
	location = {New York, {NY}, {USA}},
	title = {The fábulas model for authoring web-based children's {eBooks}},
	isbn = {978-1-4503-4689-4},
	url = {http://doi.acm.org/10.1145/3103010.3103016},
	doi = {10.1145/3103010.3103016},
	series = {{DocEng} '17},
	abstract = {Nowadays, tablets and smartphones are commonly used by children for both entertainment and education purposes. In special, interactive multimedia {eBooks} running on those devices allow a richer experience when compared to traditional text-only books, being potentially more engaging and entertaining to readers. However, to explore the most exciting features in these environments, authors are currently left alone in the sense that there is no high level (less technical) support, and these features are usually accessible only through programming or some other technical skill. In this work, we aim at extracting the main features on enhanced children's {eBooks} and propose a model, named Fábulas - the Portuguese word for fables -that allows authors to create interactive multimedia children's {eBooks} declaratively. The model was conceived by taking, as a starting point, a systematic analysis of the common concepts, with the focus on identifying and categorizing recurring characteristics and pointing out functional and non-functional requirements that establish a strong orientation towards the set of desirable abstractions of an underlying model. Moreover, the paper presents a case study for the implementation of Fábulas on the Web, and discusses the authoring of a complete interactive story over it.},
	pages = {19--28},
	booktitle = {Proceedings of the 2017 {ACM} symposium on document engineering},
	publisher = {{ACM}},
	author = {Pinto, Hedvan Fernandes and Soares Neto, Carlos De Salles and Colcher, Sérgio and Azevedo, Roberto Gerson De Albuquerque},
	year = {2017},
}

Nowadays, tablets and smartphones are commonly used by children for both entertainment and education purposes. In special, interactive multimedia eBooks running on those devices allow a richer experience when compared to traditional text-only books, being potentially more engaging and entertaining to readers. However, to explore the most exciting features in these environments, authors are currently left alone in the sense that there is no high level (less technical) support, and these features are usually accessible only through programming or some other technical skill. In this work, we aim at extracting the main features on enhanced children's eBooks and propose a model, named Fábulas - the Portuguese word for fables -that allows authors to create interactive multimedia children's eBooks declaratively. The model was conceived by taking, as a starting point, a systematic analysis of the common concepts, with the focus on identifying and categorizing recurring characteristics and pointing out functional and non-functional requirements that establish a strong orientation towards the set of desirable abstractions of an underlying model. Moreover, the paper presents a case study for the implementation of Fábulas on the Web, and discusses the authoring of a complete interactive story over it.

@inproceedings{soares_neto_creating_2017,
	location = {New York, {NY}, {USA}},
	title = {Creating multimedia learning objects},
	isbn = {978-1-4503-5096-9},
	url = {http://doi.acm.org/10.1145/3126858.3131626},
	doi = {10.1145/3126858.3131626},
	series = {{WebMedia} '17},
	abstract = {Learning Objects ({LOs}) are entities that can be used, reused, or referred during the teaching process. {LOs} allow students to individualize their learning experience with nonlinear browsing mechanisms and content adaptation. The main goal of this tutorial is to discuss both the pedagogical and technological recommendations involved in the authoring of multimedia {LOs}.},
	pages = {19--21},
	booktitle = {Proceedings of the 23rd Brazillian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Soares Neto, Carlos de Salles and Lima, Thacyla de Sousa and Damasceno, André Luiz de B. and Busson, Antonio José G.},
	year = {2017},
}

Learning Objects (LOs) are entities that can be used, reused, or referred during the teaching process. LOs allow students to individualize their learning experience with nonlinear browsing mechanisms and content adaptation. The main goal of this tutorial is to discuss both the pedagogical and technological recommendations involved in the authoring of multimedia LOs.

@incollection{moreno_synchronization_2017,
	location = {Cham},
	title = {Synchronization abstractions and separation of concerns as key aspects to the interoperability in {IoT}},
	isbn = {978-3-319-52727-7},
	url = {https://doi.org/10.1007/978-3-319-52727-7₄},
	abstract = {In this paper we argue that synchronization abstractions could be used as the glue that tie together the interactions between `things' in an {IoT} environment. We also support that this is analog to what is used in distributed multimedia applications. Using this argument, we propose in this paper that {IoT} solutions, protocols and applications should benefit from standardized multimedia tools like specification languages and corresponding middleware support platforms as a means for harmonization and interoperability. Additionally, we extend our recent contributions in favor of a separation of concerns in multimedia systems, in which synchronization support can operate independently of other features. More specifically, the main contribution of this paper is the discussions about how media synchronization challenges can enroll the Internet of Things research area, where distributed sensors and actuators are specified as media objects and can be related to usual hypermedia objects, all synchronized in time and space, in what we call the “Synchronism of Things”.},
	pages = {26--32},
	booktitle = {Interoperability, safety and security in {IoT}: Second international conference, {InterIoT} 2016 and third international conference, {SaSeIoT} 2016, paris, france, october 26-27, 2016, revised selected papers},
	publisher = {Springer International Publishing},
	author = {Moreno, Marcio Ferreira and Cerqueira, Renato and Colcher, Sérgio},
	editor = {Mitton, Nathalie and Chaouchi, Hakima and Noel, Thomas and Watteyne, Thomas and Gabillon, Alban and Capolsini, Patrick},
	year = {2017},
}

In this paper we argue that synchronization abstractions could be used as the glue that tie together the interactions between `things' in an IoT environment. We also support that this is analog to what is used in distributed multimedia applications. Using this argument, we propose in this paper that IoT solutions, protocols and applications should benefit from standardized multimedia tools like specification languages and corresponding middleware support platforms as a means for harmonization and interoperability. Additionally, we extend our recent contributions in favor of a separation of concerns in multimedia systems, in which synchronization support can operate independently of other features. More specifically, the main contribution of this paper is the discussions about how media synchronization challenges can enroll the Internet of Things research area, where distributed sensors and actuators are specified as media objects and can be related to usual hypermedia objects, all synchronized in time and space, in what we call the “Synchronism of Things”.

@incollection{colcher_current_2017,
	title = {Current Projects and Future Vision of the {TeleMídia} / {PUC}-Rio Laboratory in Videocolaboration},
	rights = {All rights reserved},
	isbn = {978-85-7669-381-9},
	url = {http://www.inf.ufrgs.br/webmedia2017/wp-content/livro_worksho_ctvideo.pdf},
	abstract = {Since the early 1990’s, the {TeleMídia} laboratory of the Department of Informatics of {PUC}-Rio researches and trains people in the areas of multimedia and hypermedia, which include interactive videos and video collaboration as important subareas. This chapter presents the main research lines and projects of the laboratory and discusses the future vision of the authors about interactive videos and video collaboration.},
	pages = {207--323},
	booktitle = {Anais do {XXIII} Simpósio Brasileiro de Sistemas Multimídia e Web: Workshop do {CT}-Vídeo (Comitê Técnico de Prospecção Tecnológica em Videocolaboração)},
	author = {Colcher, Sérgio and Guedes, Alan L. V. and Azevedo, Roberto Gerson de A. and Lima, Guilherme F. and Santos, Rodrigo C. M. and Busson, Antonio J. G.},
	year = {2017},
}

Since the early 1990’s, the TeleMídia laboratory of the Department of Informatics of PUC-Rio researches and trains people in the areas of multimedia and hypermedia, which include interactive videos and video collaboration as important subareas. This chapter presents the main research lines and projects of the laboratory and discusses the future vision of the authors about interactive videos and video collaboration.

@thesis{guedes_extending_2017-1,
	location = {,},
	title = {Extending multimedia languages to support multimodal user interactions (thesis)},
	abstract = {Recent advances in recognition technologies, such as speech, touch and gesture, have given rise to a new class of user interfaces that does not only explore multiple modalities but also allows for multiple interacting users. The development of applications with both multimodal and multiuser interactions arise new specification and execution issues. The specification of multimodal application is commonly the focus of multimodal interaction research, while the specification of the synchronization of audiovisual media is usually the focus of multimedia research. In this thesis, aiming to assist the specification of such applications, we propose to integrate concepts from those two research areas and to extend multimedia languages with first-class entities to support multiuser and multimodal features. Those entities were instantiated in {NCL} and {HTML}. To evaluate our approach, we performed an evaluation with {NCL} and {HTML} developers to capture evidences of their acceptance of the proposed entities and instantiations in those languages.},
	institution = {{PUC}-Rio},
	type = {phdthesis},
	author = {Guedes, Álan Lívio Vasconcelos},
	year = {2017},
}

Recent advances in recognition technologies, such as speech, touch and gesture, have given rise to a new class of user interfaces that does not only explore multiple modalities but also allows for multiple interacting users. The development of applications with both multimodal and multiuser interactions arise new specification and execution issues. The specification of multimodal application is commonly the focus of multimodal interaction research, while the specification of the synchronization of audiovisual media is usually the focus of multimedia research. In this thesis, aiming to assist the specification of such applications, we propose to integrate concepts from those two research areas and to extend multimedia languages with first-class entities to support multiuser and multimodal features. Those entities were instantiated in NCL and HTML. To evaluate our approach, we performed an evaluation with NCL and HTML developers to capture evidences of their acceptance of the proposed entities and instantiations in those languages.

@inproceedings{gomes_sxmlua_2016,
	location = {Teresina, {PI}, Brazil},
	title = {{SXMLua}: Definindo estilos de documentos {XML} em lua},
	series = {{WebMedia} '16},
	abstract = {This paper proposes {SXMLua} (Styling {XML} through Lua), a pre-processor and a library supporting the definition of stylesheets for {XML} documents using Lua. {SXMLua} was inspired by the {CSS} language, and, similar to it, allows the separation between the presentation and the content speci cation of {XML} documents. It also provides (through the Lua language) facilities that are not natively supported by {CSS}, such as variables and functions. Besides presenting {SXMLua}, in this paper, we also discuss its use for specifying stylesheets for interactive digital {TV} applications using {NCL} (Nested Context Language).},
	booktitle = {Proceedings of the 13rd Workshop on Undergratuate Work on the Brazilian Symposium on Multimedia and the Web},
	publisher = {{SBC}},
	author = {Gomes, Lucas and Santos, Rodrigo Costa Mesquita and Azevedo, Roberto Gerson de Albuquerque},
	year = {2016},
}

This paper proposes SXMLua (Styling XML through Lua), a pre-processor and a library supporting the definition of stylesheets for XML documents using Lua. SXMLua was inspired by the CSS language, and, similar to it, allows the separation between the presentation and the content speci cation of XML documents. It also provides (through the Lua language) facilities that are not natively supported by CSS, such as variables and functions. Besides presenting SXMLua, in this paper, we also discuss its use for specifying stylesheets for interactive digital TV applications using NCL (Nested Context Language).

@inproceedings{guedes_extending_2016,
	location = {New York, {NY}, {USA}},
	title = {Extending {NCL} to support multiuser and multimodal interactions},
	isbn = {978-1-4503-4512-5},
	url = {http://doi.acm.org/10.1145/2976796.2976869},
	doi = {10.1145/2976796.2976869},
	series = {Webmedia '16},
	abstract = {Recent advances in technologies for speech, touch and gesture recognition have given rise to a new class of user interfaces that does not only explore multiple modalities but also allows for multiple interacting users. Even so, current declarative multimedia languages e.g. {HTML}, {SMIL}, and {NCL}?support only limited forms of user input (mainly keyboard and mouse) for a single user. In this paper, we aim at studying how the {NCL} multimedia language could take advantage of those new recognition technologies. To do so, we revisit the model behind {NCL}, named {NCM} (Nested Context Model), and extend it with first-class concepts supporting multiuser and multimodal features. To evaluate our approach, we instantiate the proposal and discuss some usage scenarios, developed as {NCL} applications with our extended features.},
	pages = {39--46},
	booktitle = {Proceedings of the 22Nd brazilian symposium on multimedia and the web},
	publisher = {{ACM}},
	author = {Guedes, Álan L.V. and de Albuquerque Azevedo, Roberto G. and Colcher, Sérgio and Barbosa, Simone D.J.},
	year = {2016},
}

Recent advances in technologies for speech, touch and gesture recognition have given rise to a new class of user interfaces that does not only explore multiple modalities but also allows for multiple interacting users. Even so, current declarative multimedia languages e.g. HTML, SMIL, and NCL?support only limited forms of user input (mainly keyboard and mouse) for a single user. In this paper, we aim at studying how the NCL multimedia language could take advantage of those new recognition technologies. To do so, we revisit the model behind NCL, named NCM (Nested Context Model), and extend it with first-class concepts supporting multiuser and multimodal features. To evaluate our approach, we instantiate the proposal and discuss some usage scenarios, developed as NCL applications with our extended features.

@inproceedings{guedes_using_2016,
	title = {Using {NCL} to synchronize media objects, sensors and actuators},
	isbn = {978-1-4503-4512-5},
	url = {http://www.lbd.dcc.ufmg.br/bdbcomp/servlet/Trabalho?id=24552},
	series = {Webmedia '16},
	abstract = {{IoT} (Internet of Things) technologies are underway. Both industry and academia have been proposing technologies to support {IoT}. In particular, some {IoT} scenarios include audio-video data and aims at integrating multimedia content and {IoT} technologies. In this paper, we investigate the support for those scenarios through a multimedia language. More precisely, we use {NCL}(Nested Context Language) to take advantage of {IoT} devices and to specify interactive multimedia applications synchronizing sensors and actuators, besides the media objects. To help evaluate our approach, we present a usage scenario using an {NCL} application that synchronizes media objects and {IoT} devices.},
	booktitle = {Proceedings of 1st international workshop on synchronism of things ({WSoT})},
	author = {Guedes, Álan L.V. and de Cunha, Marcio and Fuks, Hugo and Colcher, Sérgio and Barbosa, Simone Diniz Junqueira},
	year = {2016},
}

IoT (Internet of Things) technologies are underway. Both industry and academia have been proposing technologies to support IoT. In particular, some IoT scenarios include audio-video data and aims at integrating multimedia content and IoT technologies. In this paper, we investigate the support for those scenarios through a multimedia language. More precisely, we use NCL(Nested Context Language) to take advantage of IoT devices and to specify interactive multimedia applications synchronizing sensors and actuators, besides the media objects. To help evaluate our approach, we present a usage scenario using an NCL application that synchronizes media objects and IoT devices.

@inproceedings{lima_smix_2016,
	location = {Porto Alegre, {RS}, Brazil},
	title = {The Smix synchronous multimedia language: Operational semantics and coroutine implementation},
	isbn = {978-85-7669-357-4},
	url = {http://etmf2016.imd.ufrn.br/Anais_ETMF.pdf},
	pages = {145--154},
	booktitle = {Anais da 1a escola de informática teórica e métodos formais ({ETMF} 2016), natal, {RN}, brazil, 22–23 november, 2016},
	publisher = {{SBC}},
	author = {Lima, Guilherme F. and Braga, Christiano and Haeusler, Edward Hermann},
	year = {2016},
}

@incollection{lima_programando_2016,
	location = {Teresina, Brasil},
	edition = {1},
	title = {Programando aplicações multimídia no {GStreamer}},
	abstract = {This short course is an introduction to {GStreamer}, one of the main free/open-source frameworks for multimedia processing. We start presenting {GStreamer}, its architecture and the dataflow programming model, and then adopt a hands-on approach. Starting with an example, a simple video player, we introduce the main concepts of {GStreamer}’s basic C {API} and implement them over the initial example incrementally, so that at the end of the course we get a complete video player with support for the usual playback operations (start, stop, pause, seek, fast-forward, and rewind). We also discuss sample filters—processing elements that manipulate audio and video samples—and present some of the filters natively available in {GStreamer}. Moreover, we show how one can extend the framework by creating a plugin with a custom filter that manipulates video samples. The prerequisite for the short course is a basic knowledge of the C programming language. At the end of the course, we expect that participants acquire a general view of {GStreamer}, and be able to create simple multimedia applications and explore its more advanced features.},
	publisher = {{SBC}},
	author = {Lima, Guilherme F. and Santos, Rodrigo Costa Mesquita and de Albuquerque Azevedo, Roberto Gerson},
	year = {2016},
}

This short course is an introduction to GStreamer, one of the main free/open-source frameworks for multimedia processing. We start presenting GStreamer, its architecture and the dataflow programming model, and then adopt a hands-on approach. Starting with an example, a simple video player, we introduce the main concepts of GStreamer’s basic C API and implement them over the initial example incrementally, so that at the end of the course we get a complete video player with support for the usual playback operations (start, stop, pause, seek, fast-forward, and rewind). We also discuss sample filters—processing elements that manipulate audio and video samples—and present some of the filters natively available in GStreamer. Moreover, we show how one can extend the framework by creating a plugin with a custom filter that manipulates video samples. The prerequisite for the short course is a basic knowledge of the C programming language. At the end of the course, we expect that participants acquire a general view of GStreamer, and be able to create simple multimedia applications and explore its more advanced features.

@inproceedings{moreno_deepening_2016,
	location = {New York, {NY}, {USA}},
	title = {Deepening the separation of concerns in the implementation of multimedia systems},
	isbn = {978-1-4503-3739-7},
	url = {http://doi.acm.org/10.1145/2851613.2851769},
	doi = {10.1145/2851613.2851769},
	series = {{SAC} '16},
	abstract = {The presentation of multimedia content requires devices with proper computational resources to guarantee intermedia synchronization requirements. When a multimedia system is executed in resource-constrained devices, some synchronization mismatches may occur. This problem becomes harder to solve when considering support for features like user interaction, systemic resilience, and distributed multimedia processing. This paper discusses the separation of concerns between multimedia presentation orchestration and multimedia content decoding and rendering. A multimedia system architecture and its implementation are also presented in this paper, where the separation of concerns goes beyond modularization by being deeply realized as process isolation. This design decision not only assures improved system resilience to the proposed solution but also enables it to be applied in distributed multimedia processing/presentations. Experiments carried out have indicated that the presentation orchestration does not require much resource, and may be run on lightweight devices. On the other hand, multimedia decoding/rendering is suitable to run on devices that are more resourceful.},
	pages = {1337--1343},
	booktitle = {Proceedings of the 31st annual {ACM} symposium on applied computing},
	publisher = {{ACM}},
	author = {Moreno, Marcio Ferreira and Santos, Rodrigo Costa Mesquita and Lima, Guilherme F. and Moreno, Marcelo Ferreira and Soares, Luiz Fernando Gomes},
	year = {2016},
}

The presentation of multimedia content requires devices with proper computational resources to guarantee intermedia synchronization requirements. When a multimedia system is executed in resource-constrained devices, some synchronization mismatches may occur. This problem becomes harder to solve when considering support for features like user interaction, systemic resilience, and distributed multimedia processing. This paper discusses the separation of concerns between multimedia presentation orchestration and multimedia content decoding and rendering. A multimedia system architecture and its implementation are also presented in this paper, where the separation of concerns goes beyond modularization by being deeply realized as process isolation. This design decision not only assures improved system resilience to the proposed solution but also enables it to be applied in distributed multimedia processing/presentations. Experiments carried out have indicated that the presentation orchestration does not require much resource, and may be run on lightweight devices. On the other hand, multimedia decoding/rendering is suitable to run on devices that are more resourceful.

@inproceedings{santos_ceu-media_2016,
	location = {New York, {NY}, {USA}},
	title = {{CÉU}-{MEDIA}: Local inter-media synchronization using {CÉU}},
	isbn = {978-1-4503-4512-5},
	url = {http://doi.acm.org/10.1145/2976796.2976856},
	doi = {10.1145/2976796.2976856},
	series = {Webmedia '16},
	abstract = {The semantics of current multimedia languages is informal and may lead to the development of ambiguous applications. In this paper we investigate the use of the synchronous language Céu for programming local multimedia applications, in particular, those applications that can be described as a set of synchronized media objects. Céu has a deterministic, concise and accurate semantics which, along with high-level programming constructs, makes the language an attractive alternative for developing multimedia applications. We also present Céu-Media, a library for programming multimedia in Céu. Céu-Media implementation guarantees that the properties of the Céu synchronous semantics are reflected in the multimedia presentation, ensuring inter-media synchronization. We compare the synchronization paradigm of Céu with those of {NCL} and {SMIL}, and examine the implementation of representative use cases.},
	pages = {143--150},
	booktitle = {Proceedings of the 22Nd brazilian symposium on multimedia and the web},
	publisher = {{ACM}},
	author = {Santos, Rodrigo Costa Mesquita. and Lima, Guilherme Ferreira and Sant'Anna, Francisco and Rodriguez, Noemi},
	year = {2016},
}

The semantics of current multimedia languages is informal and may lead to the development of ambiguous applications. In this paper we investigate the use of the synchronous language Céu for programming local multimedia applications, in particular, those applications that can be described as a set of synchronized media objects. Céu has a deterministic, concise and accurate semantics which, along with high-level programming constructs, makes the language an attractive alternative for developing multimedia applications. We also present Céu-Media, a library for programming multimedia in Céu. Céu-Media implementation guarantees that the properties of the Céu synchronous semantics are reflected in the multimedia presentation, ensuring inter-media synchronization. We compare the synchronization paradigm of Céu with those of NCL and SMIL, and examine the implementation of representative use cases.

@inproceedings{vasconcelos_supporting_2016,
	location = {Salvador, Brasil},
	title = {Supporting dynamic reconfiguration in distributed data stream systems},
	series = {{XXXIV} simpósio brasileiro de redes de computadores e sistemas distribuídos - {SBRC}2016},
	abstract = {The design and development of adaptive systems brings new challenges since the dynamism of such systems is a multifaceted concern that ranges from mechanisms to enable the adaptation on the software level to the (self-) management of the entire system using adaptation policies or system administrators, for instance. Data stream processing is one example of system that requires dynamic reconfiguration. While dynamic reconfiguration is a desirable feature, stream systems may suffer with the disruption and overhead caused by the reconfiguration. In this paper, we propose and validate a non-disruptive reconfiguration approach for distributed data stream systems that support stateful components and intermittent connections. We present experimental evidence that our mechanism supports safe distributed reconfiguration and has negligible impact on availability and performance.},
	author = {Vasconcelos, Rafael Oliveira and Vasconcelos, Igor and Endler, Markus and Colcher, Sérgio},
	year = {2016},
}

The design and development of adaptive systems brings new challenges since the dynamism of such systems is a multifaceted concern that ranges from mechanisms to enable the adaptation on the software level to the (self-) management of the entire system using adaptation policies or system administrators, for instance. Data stream processing is one example of system that requires dynamic reconfiguration. While dynamic reconfiguration is a desirable feature, stream systems may suffer with the disruption and overhead caused by the reconfiguration. In this paper, we propose and validate a non-disruptive reconfiguration approach for distributed data stream systems that support stateful components and intermittent connections. We present experimental evidence that our mechanism supports safe distributed reconfiguration and has negligible impact on availability and performance.

@inproceedings{rios_energy-aware_2016,
	location = {Salvador, Brasil},
	title = {An energy-aware {IoT} gateway, with continuous processing of sensor data},
	series = {{XXXIV} simpósio brasileiro de redes de computadores e sistemas distribuídos - {SBRC}2016},
	abstract = {Few studies have investigated and proposed a middleware solution for the Internet of Mobile Things ({IoMT}), where the smart things (Smart Objects) can be moved, or else can move autonomously, but remain accessible from any other computer over the Internet. In this context, there is a need for energyefficient gateways to provide connectivity to a great variety of Smart Objects. Proposed solutions have shown that mobile devices (smartphones and tablets) are a good option to become the universal intermediates by providing a connection point to nearby Smart Objects with short-range communication technologies. However, they only focus on the transmission of raw sensor data (obtained from connected Smart Objects) to the cloud where processing (e.g. aggregation) is performed. Internet Communication is a strong battery-draining activity for mobile devices; moreover, bandwidth may not be sufficient when large amounts of information is being received from the Smart Objects. Hence, we argue that some of the processing should be pushed as close as possible to the sources. In this regard, Complex Event Processing ({CEP}) is often used for real-time processing of heterogeneous data and could be a key technology to be included in the gateways. It allows a way to describe the processing as expressive queries that can be dynamically deployed or removed on-the-fly. Thus, being suitable for applications that have to deal with dynamic adaptation of local processing. This paper describes an extension of a mobile middleware with the inclusion of continuous processing of sensor data, its design and prototype implementation for Android. Experiments have shown that our implementation delivers good reduction in energy and bandwidth consumption.},
	booktitle = {{XXXIV} Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos-{SBRC}},
	author = {Ríos, Luís and Endler, Markus and Colcher, Sérgio},
	year = {2016},
}

Few studies have investigated and proposed a middleware solution for the Internet of Mobile Things (IoMT), where the smart things (Smart Objects) can be moved, or else can move autonomously, but remain accessible from any other computer over the Internet. In this context, there is a need for energyefficient gateways to provide connectivity to a great variety of Smart Objects. Proposed solutions have shown that mobile devices (smartphones and tablets) are a good option to become the universal intermediates by providing a connection point to nearby Smart Objects with short-range communication technologies. However, they only focus on the transmission of raw sensor data (obtained from connected Smart Objects) to the cloud where processing (e.g. aggregation) is performed. Internet Communication is a strong battery-draining activity for mobile devices; moreover, bandwidth may not be sufficient when large amounts of information is being received from the Smart Objects. Hence, we argue that some of the processing should be pushed as close as possible to the sources. In this regard, Complex Event Processing (CEP) is often used for real-time processing of heterogeneous data and could be a key technology to be included in the gateways. It allows a way to describe the processing as expressive queries that can be dynamically deployed or removed on-the-fly. Thus, being suitable for applications that have to deal with dynamic adaptation of local processing. This paper describes an extension of a mobile middleware with the inclusion of continuous processing of sensor data, its design and prototype implementation for Android. Experiments have shown that our implementation delivers good reduction in energy and bandwidth consumption.

@inproceedings{baptista_middleware_2016,
	location = {Salvador, Brasil},
	title = {A middleware for data - centric and dynamic distributed complex event processing for {IoT} real - time analytics in the cloud},
	series = {{XXXIV} simpósio brasileiro de redes de computadores e sistemas distribuídos - {SBRC}2016},
	abstract = {{IoT} big data real-time analytics systems need to effectively process and manage massive amounts of data from streams produced by distributed data sources. There are many challenges in deploying and managing processing logic at execution time in those systems, especially when 24x7 availability is required. Aiming to address those challenges, we have developed and tested a middleware for Distributed {CEP}, with a data-centric and dynamic design, based on the Data Distribution Service for {RealTime} Systems ({OMG}-{DDS}) specification and its extension for dynamic topics/types ({DDS}-{XTypes}). Its main advantages include the use of {OMG}-{DDS}; witch is suitable for {IoT} applications with {QoS} requirements, its dynamic capabilities, and the scalable and parallel execution of the {CEP} rules on a dynamic set of processing nodes.},
	author = {Baptista, Gustavo B. and Carvalho, Felipe and Colcher, Sérgio and Endler, Markus},
	year = {2016},
}

IoT big data real-time analytics systems need to effectively process and manage massive amounts of data from streams produced by distributed data sources. There are many challenges in deploying and managing processing logic at execution time in those systems, especially when 24x7 availability is required. Aiming to address those challenges, we have developed and tested a middleware for Distributed CEP, with a data-centric and dynamic design, based on the Data Distribution Service for RealTime Systems (OMG-DDS) specification and its extension for dynamic topics/types (DDS-XTypes). Its main advantages include the use of OMG-DDS; witch is suitable for IoT applications with QoS requirements, its dynamic capabilities, and the scalable and parallel execution of the CEP rules on a dynamic set of processing nodes.

@inproceedings{de_albuquerque_azevedo_graphics_2016,
	title = {A graphics composition architecture for multimedia applications based on layered-depth-image},
	doi = {10.1109/3DTV.2016.7548882},
	abstract = {We present a graphics architecture for the seamless integration of 3DV objects into ordinary 2D/3D multimedia applications. The architecture is based on layered-depth-image ({LDI}) and supports the real-time rendering of multiple views for multi-view 3D displays. We also present a prototype implementation of the proposed architecture in {OpenCL}, and discuss experimental results. The results indicate that the proposed approach leads to better results than other state-of-art graphics architecture for multimedia application.},
	pages = {1--4},
	booktitle = {2016 3DTV-Conference: The true vision - capture, transmission and display of 3D video (3DTV-{CON})},
	author = {de Albuquerque Azevedo, Roberto Gerson and Lima, Guilherme F.},
	year = {2016},
}

We present a graphics architecture for the seamless integration of 3DV objects into ordinary 2D/3D multimedia applications. The architecture is based on layered-depth-image (LDI) and supports the real-time rendering of multiple views for multi-view 3D displays. We also present a prototype implementation of the proposed architecture in OpenCL, and discuss experimental results. The results indicate that the proposed approach leads to better results than other state-of-art graphics architecture for multimedia application.

@patent{soares_ginga_2016,
	title = {Ginga architecture for integrated broadcast and broadband digital television},
	url = {https://patents.google.com/patent/US20160234533A1/},
	holder = {Pontificia Universidade Catolica do Rio de Janeiro},
	type = {patent},
	author = {Soares, Luiz Fernando Gomes and Marcelo Ferreira Moreno},
	urlyear = {2017},
	year = {2016},
}

@inproceedings{guedes_towards_2016,
	title = {Towards supporting multimodal and multiuser interactions in multimedia languages},
	rights = {All rights reserved},
	url = {https://doceng2016.cvl.tuwien.ac.at/?page_id=594},
	abstract = {Multimedia languages—e.g. {HTML}, {SMIL}, and {NCL} (Nested Context Language)—are declarative programming languages focused on specifying multimedia applications using media and time abstractions. Traditionally, those languages focus on synchronizing a multimedia presentation and on supporting limited user interactions. Their support for media abstractions aim at graphical user interfaces ({GUIs}) by offering elements such as text (e.g. {HTML}’s {\textless}p{\textgreater}, {SMIL}’s {\textless}text{\textgreater}), graphics (e.g. {\textless}img{\textgreater}), videos (e.g. {HTML}’s {\textless}video{\textgreater}). Additionally, their support for user interactions also aims at {GUIs}, as they offer abstractions only for mouse (e.g. {HTML}’s {onClick}, {NCL}’s {onSelection}) and keyboard (e.g. {HTML} and {SMIL}’s {keyPress}, and {NCL}’s {onKeySelection}) recognitions. However, current advances in recognition technologies—e.g. speech, touch and gesture recognition—have given rise to a new class of multimodal user interfaces ({MUIs}) and the possibility of developing multiusers-aware multimedia systems. Throughout our research, we argue that multimedia language models should take advantage of those new possibilities, and we propose to extend existing multimedia languages with multimodal and multiuser abstractions.},
	booktitle = {Proceeding of the eighth {ACM} symposium on Document engineering - {DocEng} '16: Doctoral Consortium},
	author = {Guedes, Alan},
	year = {2016},
}

Multimedia languages—e.g. HTML, SMIL, and NCL (Nested Context Language)—are declarative programming languages focused on specifying multimedia applications using media and time abstractions. Traditionally, those languages focus on synchronizing a multimedia presentation and on supporting limited user interactions. Their support for media abstractions aim at graphical user interfaces (GUIs) by offering elements such as text (e.g. HTML’s \textlessp\textgreater, SMIL’s \textlesstext\textgreater), graphics (e.g. \textlessimg\textgreater), videos (e.g. HTML’s \textlessvideo\textgreater). Additionally, their support for user interactions also aims at GUIs, as they offer abstractions only for mouse (e.g. HTML’s onClick, NCL’s onSelection) and keyboard (e.g. HTML and SMIL’s keyPress, and NCL’s onKeySelection) recognitions. However, current advances in recognition technologies—e.g. speech, touch and gesture recognition—have given rise to a new class of multimodal user interfaces (MUIs) and the possibility of developing multiusers-aware multimedia systems. Throughout our research, we argue that multimedia language models should take advantage of those new possibilities, and we propose to extend existing multimedia languages with multimodal and multiuser abstractions.

@inproceedings{azevedo_approach_2015,
	location = {New York, {NY}, {USA}},
	title = {An approach to convert {NCL} applications into stereoscopic 3D},
	isbn = {978-1-4503-3307-8},
	url = {http://doi.acm.org/10.1145/2682571.2797064},
	doi = {10.1145/2682571.2797064},
	series = {{DocEng} '15},
	abstract = {This paper presents and discusses the internal operation of {NCLSC} ({NCL} Stereo Converter): a tool to convert a 2D interactive multimedia application annotated with depth information to a stereoscopic-multimedia application. Stereoscopic-multimedia applications are those that codify both the left-eye and right-eye views, as required by stereoscopic 3D displays. {NCLSC} takes as input an {NCL} (Nested Context Language) document and outputs an {NCL} stereoscopic application codified in side-by-side or top-bottom format (both common input formats for 3DTV sets). {NCL} is the declarative language adopted in most Latin America countries for terrestrial digital {TV} middleware systems and the {ITU}-T H.761 Recommendation for {IPTV} services. However, the proposed approach is not restricted to {NCL} and can be used by other languages. The depth annotation allows for positioning each 2D graphical component in a layered (2.5D or 2D+depth) user interface. It is used by {NCLSC} to compute the screen parallax (offset) between the graphical elements in the left and right views of the resulting stereoscopic application. When the resulting application is presented on stereoscopic 3D displays, such screen parallax induces retinal disparity, which creates the illusion of floating flat-2D graphical elements. {NCLSC} does not require any additional native middleware support to run in currently available 3D-enabled {TV} sets. Moreover, {NCLSC} can adapt, at run-time, the output application to different display sizes, viewer distances, and viewer preferences, which are usually required for a proper balance between artistic effects and user experience.},
	pages = {177--186},
	booktitle = {Proceedings of the 2015 {ACM} symposium on document engineering},
	publisher = {{ACM}},
	author = {Azevedo, Roberto Gerson de Albuquerque and Lima, Guilherme F. and Soares, Luiz Fernando Gomes},
	year = {2015},
}

This paper presents and discusses the internal operation of NCLSC (NCL Stereo Converter): a tool to convert a 2D interactive multimedia application annotated with depth information to a stereoscopic-multimedia application. Stereoscopic-multimedia applications are those that codify both the left-eye and right-eye views, as required by stereoscopic 3D displays. NCLSC takes as input an NCL (Nested Context Language) document and outputs an NCL stereoscopic application codified in side-by-side or top-bottom format (both common input formats for 3DTV sets). NCL is the declarative language adopted in most Latin America countries for terrestrial digital TV middleware systems and the ITU-T H.761 Recommendation for IPTV services. However, the proposed approach is not restricted to NCL and can be used by other languages. The depth annotation allows for positioning each 2D graphical component in a layered (2.5D or 2D+depth) user interface. It is used by NCLSC to compute the screen parallax (offset) between the graphical elements in the left and right views of the resulting stereoscopic application. When the resulting application is presented on stereoscopic 3D displays, such screen parallax induces retinal disparity, which creates the illusion of floating flat-2D graphical elements. NCLSC does not require any additional native middleware support to run in currently available 3D-enabled TV sets. Moreover, NCLSC can adapt, at run-time, the output application to different display sizes, viewer distances, and viewer preferences, which are usually required for a proper balance between artistic effects and user experience.

@thesis{de_albuquerque_azevedo_supporting_2015,
	location = {,},
	title = {Supporting multimedia applications in stereoscopic and depth-based 3D video systems},
	abstract = {Two-dimensional video technologies have evolved quickly in the last few years. Even so, they do not achieve a realistic and immersive view of the world since they do not offer important depth cues to the human vision system. Three- dimensional video (3DV) technologies try to fulfill this gap through video representations that enable 3D displays to provide those additional depth cues. A lthough {CSV} (Conventional Stereoscopic Video) has been the most widely-used 3DV representation, other 3DV representations have emerged during the last years. Examples of those representations include {MVV} (Multi-view video), 2D+Z (2D plus depth), {MVD} (Multi-view plus depth), and {LDV} (Layered-depth Video). Although end-to-end 3DV delivery chains based on those 3DV formats have been studied, the integration of interactive multimedia applications into those 3DV delivery chains has not yet been explored enough. The integration of multimedia applications with 3D media using those new representations has the potential of allowing new rich content, user experiences and business models. In this thesis, two approaches for the integration of multimedia applications into 3DV end-to-end delivery chains are proposed. First, a backward-compatible approach for integrating {CSV}-based media into 2D-only multimedia languages is discussed. In this proposal, it is possible to add depth information to 2D-only media objects. The proposal consists of extensions to multimedia languages and a process for converting the original multimedia application into its stereoscopic version. It does not require any change on the language player and is ready-to-run in current {CSV}-based 3DV delivery chains and digital receiver's hardware. Second, extensions to multimedia languages based on layered-depth media are proposed and a software architecture for the graphics composition of multimedia applications using those extensions is presented. As an example, both proposals are implemented and integrated into an end-to-end 3DV delivery chain based on the Brazilian Digital {TV} System.},
	type = {phdthesis},
	author = {de Albuquerque Azevedo, Roberto Gerson},
	year = {2015},
}

Two-dimensional video technologies have evolved quickly in the last few years. Even so, they do not achieve a realistic and immersive view of the world since they do not offer important depth cues to the human vision system. Three- dimensional video (3DV) technologies try to fulfill this gap through video representations that enable 3D displays to provide those additional depth cues. A lthough CSV (Conventional Stereoscopic Video) has been the most widely-used 3DV representation, other 3DV representations have emerged during the last years. Examples of those representations include MVV (Multi-view video), 2D+Z (2D plus depth), MVD (Multi-view plus depth), and LDV (Layered-depth Video). Although end-to-end 3DV delivery chains based on those 3DV formats have been studied, the integration of interactive multimedia applications into those 3DV delivery chains has not yet been explored enough. The integration of multimedia applications with 3D media using those new representations has the potential of allowing new rich content, user experiences and business models. In this thesis, two approaches for the integration of multimedia applications into 3DV end-to-end delivery chains are proposed. First, a backward-compatible approach for integrating CSV-based media into 2D-only multimedia languages is discussed. In this proposal, it is possible to add depth information to 2D-only media objects. The proposal consists of extensions to multimedia languages and a process for converting the original multimedia application into its stereoscopic version. It does not require any change on the language player and is ready-to-run in current CSV-based 3DV delivery chains and digital receiver's hardware. Second, extensions to multimedia languages based on layered-depth media are proposed and a software architecture for the graphics composition of multimedia applications using those extensions is presented. As an example, both proposals are implemented and integrated into an end-to-end 3DV delivery chain based on the Brazilian Digital TV System.

@thesis{diniz_o_2015,
	location = {Rio de Janeiro, Brasil},
	title = {O perfil {NCL}-{DR} e o middleware ginga para receptores do sistema brasileiro de rádio digital},
	url = {http://www.telemidia.puc-rio.br/~rafaeldiniz/radio/1312398_2015_Completo.pdf},
	type = {phdthesis},
	author = {Diniz, Rafael},
	year = {2015},
}

@inproceedings{diniz_transmissao_2015,
	location = {Manaus, Brasil},
	title = {Transmissão de aplicações interativas para o middleware ginga no sistema brasileiro de rádio digital},
	series = {{XXI} simpósio brasileiro de sistemas multimídia e hipermídia},
	pages = {4},
	author = {Diniz, Rafael and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2015},
}

@thesis{lima_synchronous_2015,
	location = {,},
	title = {A synchronous virtual machine for multimedia presentations},
	type = {phdthesis},
	author = {Lima, Guilherme Augusto Ferreira},
	year = {2015},
}

@article{moreno_interleaved_2015,
	title = {Interleaved time bases in hypermedia synchronization},
	volume = {22},
	pages = {10},
	journaltitle = {{IEEE} Multimedia Magazine},
	author = {Moreno, Marcio Ferreira and Costa, Romualdo Monteiro Resende and Soares, Luiz Fernando Gomes},
	year = {2015},
}

@inproceedings{moreno_support_2015,
	location = {Miami, {USA}},
	title = {Support to multimedia presentations on multi-head setups},
	series = {International symposium on multimedia ({ISM} 2014)},
	author = {Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2015},
}

@inproceedings{santos_architecture_2015,
	title = {An architecture to assist multimedia application authors and presentation engine developers},
	doi = {10.1109/ICME.2015.7177397},
	abstract = {This paper presents an architecture for monitoring the presentation of multimedia declarative applications, providing feedback about variables states, object properties, media presentation times, among others. Monitoring tools that follow the proposed architecture are able to detect if visual problems are being caused by programming errors or by player malfunctioning. The architecture presents a communication protocol designed to be independent of the declarative language used in the development of multimedia applications. The main goal is to provide an open and generic architecture that can assist multimedia application authors and presentation engine developers. As an example of the architecture use, the paper also presents a monitoring tool integrated into a graphical user interface developed for the {ITU}-T reference implementation of the Ginga-{NCL} middleware.},
	pages = {1--6},
	booktitle = {2015 {IEEE} international conference on multimedia and expo ({ICME})},
	author = {Santos, Rodrigo Costa Mesquita and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2015},
}

This paper presents an architecture for monitoring the presentation of multimedia declarative applications, providing feedback about variables states, object properties, media presentation times, among others. Monitoring tools that follow the proposed architecture are able to detect if visual problems are being caused by programming errors or by player malfunctioning. The architecture presents a communication protocol designed to be independent of the declarative language used in the development of multimedia applications. The main goal is to provide an open and generic architecture that can assist multimedia application authors and presentation engine developers. As an example of the architecture use, the paper also presents a monitoring tool integrated into a graphical user interface developed for the ITU-T reference implementation of the Ginga-NCL middleware.

@inproceedings{diniz_transmission_2015,
	location = {New York, {NY}, {USA}},
	title = {Transmission of Interactive Applications for the Ginga Middleware in the Context of the Brazilian Digital Radio System},
	isbn = {978-1-4503-3959-9},
	url = {http://doi.acm.org/10.1145/2820426.2820455},
	doi = {10.1145/2820426.2820455},
	series = {{WebMedia} '15},
	abstract = {Ginga, the middleware of the Brazilian Digital {TV} System, can also work in the context of the Brazilian Digital Radio System. This paper presents a solution for the transmission of {NCL} applications for both digital radio systems in consideration by adoption in Brazil. An emphasis is placed on the support to advanced features of Ginga, like fine synchronization between the main audio stream and other media content, and live edition of {NCL} presentations.},
	pages = {141--144},
	booktitle = {Proceedings of the 21st Brazilian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Diniz, Rafael and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	urlyear = {2017},
	year = {2015},
}

Ginga, the middleware of the Brazilian Digital TV System, can also work in the context of the Brazilian Digital Radio System. This paper presents a solution for the transmission of NCL applications for both digital radio systems in consideration by adoption in Brazil. An emphasis is placed on the support to advanced features of Ginga, like fine synchronization between the main audio stream and other media content, and live edition of NCL presentations.

@article{soares_ncl_2015,
	title = {{NCL} Handbook},
	issn = {0103-9741},
	url = {handbook.ncl.org.br},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}18/13},
	author = {Soares, Luiz Fernando Gomes and Lima, Guilherme F.},
	urlyear = {2016},
	year = {2015},
}

@inproceedings{guedes_specification_2015,
	location = {New York, {NY}, {USA}},
	title = {Specification of Multimodal Interactions in {NCL}},
	rights = {All rights reserved},
	isbn = {978-1-4503-3959-9},
	url = {http://doi.acm.org/10.1145/2820426.2820436},
	doi = {10.1145/2820426.2820436},
	series = {{WebMedia} '15},
	abstract = {This paper proposes an approach to integrate multimodal events--both user-generated, e.g., audio recognizer, motion sensors; and user-consumed, e.g., speech synthesizer, haptic synthesizer--into programming languages for the declarative specification of multimedia applications. More precisely, it presents extensions to the {NCL} (Nested Context Language) multimedia language. {NCL} is the standard declarative language for the development of interactive applications for Brazilian Digital {TV} and an {ITU}-T Recommendation for {IPTV} services. {NCL} applications extended with the multimodal features are presented as results. Historically, Human-Computer Interaction research community has been focusing on user-generated modalities, through studies on the user interaction. On the other hand, Multimedia community has been focusing on output modalities, through studies on timing and multimedia processing. The proposals in this paper is an attempt to integrate concepts of both research communities in a unique high-level programming framework, which aims to assist the authoring of multimedia/multimodal applications.},
	pages = {181--187},
	booktitle = {Proceedings of the 21st Brazilian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Guedes, Alan L. V. and Azevedo, Roberto Gerson de Albuquerque and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2015},
}

This paper proposes an approach to integrate multimodal events–both user-generated, e.g., audio recognizer, motion sensors; and user-consumed, e.g., speech synthesizer, haptic synthesizer–into programming languages for the declarative specification of multimedia applications. More precisely, it presents extensions to the NCL (Nested Context Language) multimedia language. NCL is the standard declarative language for the development of interactive applications for Brazilian Digital TV and an ITU-T Recommendation for IPTV services. NCL applications extended with the multimodal features are presented as results. Historically, Human-Computer Interaction research community has been focusing on user-generated modalities, through studies on the user interaction. On the other hand, Multimedia community has been focusing on output modalities, through studies on timing and multimedia processing. The proposals in this paper is an attempt to integrate concepts of both research communities in a unique high-level programming framework, which aims to assist the authoring of multimedia/multimodal applications.

@inproceedings{guedes_especificacao_2015,
	location = {Manaus, Brasil},
	title = {Especificação de interações multimodais em {NCL}},
	series = {{XXI} simpósio brasileiro de sistemas multimídia e hipermídia},
	pages = {7},
	author = {Guedes, Álan Livio Vasconcelos and de Albuquerque Azevedo, Roberto Gerson and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2015},
}

@inproceedings{soares_controlling_2015,
	location = {Salamanca, Spain},
	title = {Controlling the focus and input events in multimedia applications},
	doi = {10.1145/2695664.2695885},
	series = {30th annual {ACM} symposium on applied computing ({SAC} '15)},
	author = {Soares, Luiz Fernando Gomes and Moreno, Marcio Ferreira and Guedes, Álan Livio Vasconcelos},
	year = {2015},
}

@inproceedings{araujo_projetando_2014,
	location = {João Pessoa, Brasil},
	title = {Projetando aplicações para {TVDi} através de storyboards interativos},
	doi = {http://doi.acm.org/10.1145/266455},
	series = {{XX} simpósio brasileiro de sistemas multimídia e hipermídia},
	author = {Araújo, Eduardo Cruz and Soares, Luiz Fernando Gomes},
	year = {2014},
}

@inproceedings{barbosa_towards_2014,
	location = {Florianópolis, Brasil},
	title = {Towards the application of {WebRTC} peer-to-peer to scale live video streaming over the internet},
	doi = {2177-496X},
	series = {Simpósio brasileiro de redes de computadores},
	publisher = {{SBC}},
	author = {Barbosa, Flávio Ribeiro Nogueira and Soares, Luiz Fernando Gomes},
	year = {2014},
}

@inproceedings{de_albuquerque_azevedo_real-time_2014,
	location = {Vevada, {USA}},
	title = {Real-time depth-image-based rendering for 3DTV using {OpenCL}},
	doi = {10.1007/978-3-319-14249-4_10},
	series = {10th international symposium on visual computing},
	author = {de Albuquerque Azevedo, Roberto Gerson and Ismério, Fernando and Raposo, Alberto Barbosa and Soares, Luiz Fernando Gomes},
	year = {2014},
}

@thesis{figueroa_pre-busca_2014,
	location = {Rio de Janeiro, Brasil},
	title = {Pré-busca de conteúdo em apresentações multimídia},
	url = {http://www2.dbd.puc-rio.br/pergamum/tesesabertas/1121838_2014_completo.pdf},
	type = {phdthesis},
	author = {Figueroa, Amparito Alexandra Morales},
	year = {2014},
}

@inproceedings{moreno_using_2014,
	location = {Taichung, Taiwan},
	title = {Using multiple interleaved time bases in hypermedia synchronization},
	doi = {10.1109/ISM.2014.66},
	series = {International symposium on multimedia ({ISM} 2014)},
	author = {Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2014},
}

@inproceedings{soares_sincronismo_2014,
	location = {João Pessoa, Brasil},
	title = {Sincronismo das coisas não é apenas expressão da moda},
	series = {{XX} simpósio brasileiro de sistemas multimídia e hipermídia},
	abstract = {Em vídeos colaborativos, o sincronismo de mídia exerce um papel fundamental na qualidade do serviço. O problema do sincronismo se torna ainda mais complexo nos serviços imersivos em ambientes inteligentes, onde não apenas os diversos conteúdos de mídia têm de ser sincronizados, mas também outros objetos, como a intensidade da iluminação, a temperatura do ambiente etc. Este artigo aborda alguns dos vários problemas encontrados no sincronismo de objetos em serviços de vídeo colaborativos.},
	author = {Soares, Luiz Fernando Gomes},
	year = {2014},
}

Em vídeos colaborativos, o sincronismo de mídia exerce um papel fundamental na qualidade do serviço. O problema do sincronismo se torna ainda mais complexo nos serviços imersivos em ambientes inteligentes, onde não apenas os diversos conteúdos de mídia têm de ser sincronizados, mas também outros objetos, como a intensidade da iluminação, a temperatura do ambiente etc. Este artigo aborda alguns dos vários problemas encontrados no sincronismo de objetos em serviços de vídeo colaborativos.

@inproceedings{santos_catalog_2014,
	location = {New York, {NY}, {USA}},
	title = {Catalog of Templates: An Approach for Documenting Families of Hypermedia Documents},
	isbn = {978-1-4503-3230-9},
	url = {http://doi.acm.org/10.1145/2664551.2664560},
	doi = {10.1145/2664551.2664560},
	shorttitle = {Catalog of Templates},
	abstract = {Two actors are identified in template-oriented authoring: the template author and the application author. Classifying hypermedia templates, aiming to support application authors in searching for suitable templates, in inferring on their semantic and in knowing how to fill them to generate applications is the focus of this paper. In doing so, it can be said that the proposed catalog somehow mediates the communication between template and application authors, favoring reuse and reducing the cognitive load; thereby facilitating application authoring. As an example of use, an indexing and storage apparatus, associated with a template authoring tool, and a search plug-in coupled with an application authoring tool are presented.},
	pages = {39--46},
	booktitle = {Proceedings of the 20th Brazilian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Santos, Rodrigo Costa Mesquita and Neto, Carlos de Salles Soares and Gomes Soares, Luiz Fernando},
	urlyear = {2015},
	year = {2014},
}

Two actors are identified in template-oriented authoring: the template author and the application author. Classifying hypermedia templates, aiming to support application authors in searching for suitable templates, in inferring on their semantic and in knowing how to fill them to generate applications is the focus of this paper. In doing so, it can be said that the proposed catalog somehow mediates the communication between template and application authors, favoring reuse and reducing the cognitive load; thereby facilitating application authoring. As an example of use, an indexing and storage apparatus, associated with a template authoring tool, and a search plug-in coupled with an application authoring tool are presented.

@inproceedings{araujo_designing_2014,
	location = {New York, {NY}, {USA}},
	title = {Designing {iDTV} Applications Through Interactive Storyboards},
	isbn = {978-1-4503-3230-9},
	url = {http://doi.acm.org/10.1145/2664551.2664572},
	doi = {10.1145/2664551.2664572},
	series = {{WebMedia} '14},
	abstract = {This paper presents an authoring tool focused on the design of interactive narratives, named {ISB} Designer. Based on techniques used by film and animation producers, the tool does not rule out paradigms they are used to. One of its main advantages is to allow the design of audiovisual content together with its points of adaptation and intervention, thus helping in the detection and correction of narrative inconsistencies. Another {ISB} Designer differential is the possibility of designing applications for presentations on multiple screens. Unlike other tools, the {ISB} Designer focuses on the design and prototyping phase of applications, as a means of producing higher quality interactive narratives, for then automatically generate the final application, in a post-project stage.},
	pages = {5--12},
	booktitle = {Proceedings of the 20th Brazilian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Araújo, Eduardo Cruz and Soares, Luiz Fernando Gomes},
	urlyear = {2016},
	year = {2014},
}

This paper presents an authoring tool focused on the design of interactive narratives, named ISB Designer. Based on techniques used by film and animation producers, the tool does not rule out paradigms they are used to. One of its main advantages is to allow the design of audiovisual content together with its points of adaptation and intervention, thus helping in the detection and correction of narrative inconsistencies. Another ISB Designer differential is the possibility of designing applications for presentations on multiple screens. Unlike other tools, the ISB Designer focuses on the design and prototyping phase of applications, as a means of producing higher quality interactive narratives, for then automatically generate the final application, in a post-project stage.

@inproceedings{de_albuquerque_azevedo_ginga_2014,
	location = {Budapest, Hungria},
	title = {Ginga extensions to support depth-based 3D media},
	doi = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6874715},
	series = {3DTV conference},
	author = {de Albuquerque Azevedo, Roberto Gerson and Soares, Luiz Fernando Gomes},
	year = {2014},
}

@inproceedings{soares_framework_2014,
	location = {João Pessoa, Brasil},
	title = {Framework para geração automática de aplicações hipermídia em tempo de execução},
	doi = {http://doi.acm.org/10.1145/2664551.2664559},
	series = {{XX} simpósio brasileiro de sistemas multimídia e hipermídia},
	author = {Soares, Luiz Fernando Gomes and de Salles Soares Neto, Carlos and de Sousa Júnior, José Geraldo},
	year = {2014},
}

@inproceedings{santos_extending_2014,
	location = {Las Vegas, {USA}},
	title = {Extending {iTV} applications through web services},
	doi = {1-60132-287-9},
	series = {International conference on semantic web and web services ({SWWS}’2014)},
	author = {Santos, Rodrigo Costa Mesquita and Moreno, Marcio Ferreira and Nagato, Felipe and Soares, Luiz Fernando Gomes},
	year = {2014},
}

@inproceedings{santos_development_2014,
	location = {Florida, Estados Unidos},
	title = {Development of an advanced t-government application},
	series = {3rd international workshop on {ADVANCEs} c infrastructures and services},
	author = {Santos, Rodrigo Costa Mesquita and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2014},
}

@article{de_albuquerque_azevedo_composer_2014,
	title = {Composer: Meeting non-functional aspects of hypermedia authoring environment},
	volume = {70},
	doi = {10.1007/s11042-012-1216-8},
	journaltitle = {Journal of Multimedia Tools and Applications - {MM} Tools\&Applications},
	author = {de Albuquerque Azevedo, Roberto Gerson and Araújo, Eduardo Cruz and Lima, Bruno Seabra and Soares, Luiz Fernando Gomes and Moreno, Marcelo Ferreira},
	year = {2014},
}

@inproceedings{santos_catalogo_2014,
	location = {João Pessoa, Brasil},
	title = {Catálogo de templates: Uma abordagem para documentação de famílias de documentos hipermídia},
	doi = {http://doi.acm.org/10.1145/2664551.2664560},
	series = {{XX} simpósio brasileiro de sistemas multimídia e hipermídia},
	author = {Santos, Rodrigo Costa Mesquita and de Salles Soares Neto, Carlos and Soares, Luiz Fernando Gomes},
	year = {2014},
}

@inproceedings{soares_revisiting_2013,
	location = {Nantes, França},
	title = {Revisiting the inter and intra-media synchronization model of the {NCL} player architecture},
	series = {Media synchronization workshop ({MediaSync}2013)},
	author = {Soares, Luiz Fernando Gomes and Moreno, Marcio Ferreira and Lima, Guilherme Augusto Ferreira and de Albuquerque Azevedo, Roberto Gerson and Araújo, Eduardo Cruz and Rios, Ricardo and Batista, Carlos Eduardo C. F.},
	year = {2013},
}

@inproceedings{de_albuquerque_azevedo_multimedia_2013,
	location = {Florence, Italy},
	title = {Multimedia authoring based on templates and semi-automatic generated wizards},
	doi = {10.1145/2494266.2494283},
	series = {{DocEng} 2013},
	pages = {10},
	publisher = {{ACM}},
	author = {de Albuquerque Azevedo, Roberto Gerson and Santos, Rodrigo Costa Mesquita and Araújo, Eduardo Cruz and Soares, Luiz Fernando Gomes and de Salles Soares Neto, Carlos},
	year = {2013},
}

@inproceedings{lima_reducing_2013,
	location = {Salvador, Brasil},
	title = {Reducing the complexity of {NCL} player implementations},
	doi = {DOI:10.1145/2526188.2526217},
	series = {{XIX} simpósio brasileiro de sistemas multimídia e hipermídia},
	author = {Lima, Guilherme Augusto Ferreira and Soares, Luiz Fernando Gomes and Moreno, Marcio Ferreira and de Albuquerque Azevedo, Roberto Gerson},
	year = {2013},
}

@article{soares_interatividade_2013,
	title = {Interatividade va {TV} digital aberta brasileira},
	volume = {7},
	doi = {1981-4070},
	journaltitle = {Lumina},
	author = {Soares, Luiz Fernando Gomes},
	year = {2013},
}

@inproceedings{moreno_component-based_2013,
	location = {Las Vegas, {USA}},
	title = {A component-based architecture for ginga},
	isbn = {1-60132-260-7},
	series = {{SERP}'13},
	author = {Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes and Cerqueira, Renato},
	year = {2013},
}

@article{soares_fsmda_2013,
	title = {{FSMDA} Instantiation to Support {NCL} 3.1 Applications in Ginga Reference Implementation},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/13_12_soares.pdf},
	issue = {{PUC}-Rio Inf {MCC}12/13},
	journaltitle = {Monografias em Ciência da Computação},
	author = {Soares, Luiz Fernando Gomes and Batista, Carlos Eduardo Coelho Freire},
	year = {2013},
}

@inproceedings{azevedo_ncldepth_2013,
	location = {New York, {NY}, {USA}},
	title = {{NCL}+Depth: Extending {NCL} for Stereo/Autostereoscopic 3D Displays},
	isbn = {978-1-4503-2559-2},
	url = {http://doi.acm.org/10.1145/2526188.2526203},
	doi = {10.1145/2526188.2526203},
	series = {{WebMedia} '13},
	shorttitle = {{NCL}+Depth},
	abstract = {The availability of 3D-enabled displays, both stereoscopic and autostereoscopic ones, is growing in the market. However, most of the current multimedia digital {TV} standard for describing interactive applications does not take advantage of these technologies. A useful and flexible way to codify 3D-video to work with both stereoscopic and autoestereoscopic displays is using video plus depth-per-pixel information. In order to improve authoring of interactive digital {TV} applications written in {NCL} (Nested Context Language), the Latin-American standard for digital {TV}, this paper proposes some extensions to this language to allow multimedia authors to be aware of depth information. Among the new features provided it is the control and animation of depth information for synthetic and non-synthetic media objects. As it is based on 2D+depth information, the proposed extensions will enable multimedia authors to take advantage of stereo and autostereoscopic displays, and also are compatible with previous versions of {NCL} players.},
	pages = {185--192},
	booktitle = {Proceedings of the 19th Brazilian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Azevedo, Roberto Gerson de Albuquerque and Soares, Luiz Fernando Gomes},
	urlyear = {2016},
	year = {2013},
}

The availability of 3D-enabled displays, both stereoscopic and autostereoscopic ones, is growing in the market. However, most of the current multimedia digital TV standard for describing interactive applications does not take advantage of these technologies. A useful and flexible way to codify 3D-video to work with both stereoscopic and autoestereoscopic displays is using video plus depth-per-pixel information. In order to improve authoring of interactive digital TV applications written in NCL (Nested Context Language), the Latin-American standard for digital TV, this paper proposes some extensions to this language to allow multimedia authors to be aware of depth information. Among the new features provided it is the control and animation of depth information for synthetic and non-synthetic media objects. As it is based on 2D+depth information, the proposed extensions will enable multimedia authors to take advantage of stereo and autostereoscopic displays, and also are compatible with previous versions of NCL players.

@inproceedings{lima_two_2013,
	location = {Salvador, Brasil},
	title = {Two normal forms for link-connector pairs in {NCL} 3.0},
	doi = {DOI:10.1145/2526188.2526238},
	series = {{XIX} simpósio brasileiro de sistemas multimídia e hipermídia},
	author = {Lima, Guilherme Augusto Ferreira and Soares, Luiz Fernando Gomes},
	year = {2013},
}

@article{soares_ginga-ncl_2013,
	title = {Ginga-{NCL} architecture for plug-ins},
	volume = {43},
	doi = {10.1002/spe.2144},
	journaltitle = {Software: Practice and Experience},
	author = {Soares, Luiz Fernando Gomes and Moreno, Marcio Ferreira and Marinho, Rafael Savignon},
	year = {2013},
}

@thesis{batista_ginga-md_2013,
	location = {Rio de Janeiro, Brasil},
	title = {Ginga-md: Uma plataforma para suporte à execução de aplicações hipermídia multi-dispositivos baseada em {NCL}},
	url = {http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21956@1},
	type = {phdthesis},
	author = {Batista, Carlos Eduardo C. F.},
	year = {2013},
}

@inproceedings{moreno_controle_2013,
	location = {Naiguatá, Venezuela},
	title = {Controle hierárquico do foco e de eventos de entrada em aplicações hipermídia},
	isbn = {978-1-4799-1340-4},
	series = {{XXXIX} latin american computing conference - {CLEI} 2013},
	author = {Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2013},
}

@inproceedings{rios_nested_2013,
	location = {Anaheim, Estados Unidos},
	title = {The nested event model for multimedia narratives},
	isbn = {978-0-7695-5140-1},
	doi = {10.1109/ISM.2013.26},
	series = {{IEEE} international symposium on multimedia ({ISM}2013)},
	author = {Rios, Ricardo and Casanova, Marco Antônio and Soares, Luiz Fernando Gomes},
	year = {2013},
}

@inproceedings{de_albuquerque_azevedo_ncldepth_2013,
	location = {Salvador, Brasil},
	title = {{NCL}+depth: Estendendo {NCL} para displays 3D Estereo/Autoestereoscópicos},
	doi = {DOI: 10.1145/2526188.2526203},
	series = {{XIX} simpósio brasileiro de sistemas multimídia e hipermídia},
	author = {de Albuquerque Azevedo, Roberto Gerson and Soares, Luiz Fernando Gomes},
	year = {2013},
}

@inproceedings{de_salles_soares_neto_tal_2012,
	location = {Paris,},
	title = {{TAL} processor for hypermedia applications},
	doi = {10.1145/2361354.2361369},
	series = {{XII} {ACM} symposium on document engineering - {DocEng}2012},
	publisher = {{ACM} New York, {NY}, {USA}},
	author = {de Salles Soares Neto, Carlos and Pinto, Hedvan F. and Soares, Luiz Fernando Gomes},
	year = {2012},
}

@inproceedings{soares_architecture_2012,
	location = {Paris,},
	title = {Architecture for hypermedia dynamic applications with content and behavior constraints},
	doi = {10.1145/2361354.2361403},
	series = {{XII} {ACM} symposium on document engineering - {DocEng}2012},
	publisher = {{ACM} New York, {NY}, {USA}},
	author = {Soares, Luiz Fernando Gomes and de Salles Soares Neto, Carlos and de Sousa Júnior, José Geraldo},
	year = {2012},
}

@article{neto_tal_2012,
	title = {{TAL} - Template Authoring Language},
	volume = {18},
	doi = {10.1007/s13173-012-0073-7},
	pages = {185--199},
	number = {3},
	journaltitle = {J. Braz. Comp. Soc.},
	author = {Neto, Carlos de Salles Soares and Soares, Luiz Fernando Gomes and Souza, Clarisse Sieckenius de},
	year = {2012},
}

@article{baum_ginga_2012,
	title = {Ginga middleware and digital {TV} in latin america},
	volume = {14},
	doi = {10.1109/MITP.2012.78},
	journaltitle = {{IT} Professional},
	author = {Baum, Gabriel and Soares, Luiz Fernando Gomes},
	year = {2012},
}

@inproceedings{de_albuquerque_azevedo_embedding_2012,
	location = {Los Angeles, {USA}},
	title = {Embedding 3D objects into {NCL} multimedia presentations},
	doi = {10.1145/2338714.2338739},
	series = {Web3D},
	publisher = {{ACM} New York, {NY}, {USA}},
	author = {de Albuquerque Azevedo, Roberto Gerson and Soares, Luiz Fernando Gomes},
	year = {2012},
}

@thesis{araujo_projetando_2012,
	location = {Rio de Janeiro, Brasil},
	title = {Projetando aplicações para {TVDI} através de storyboards interativos},
	url = {http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=20948@1},
	type = {phdthesis},
	author = {Araújo, Eduardo Cruz},
	year = {2012},
}

@inproceedings{batista_recuperacao_2011,
	location = {Florianópolis, Brasil},
	title = {Recuperação e tolerância a falhas em apresentações de aplicações hipermídia distribuídas},
	doi = {2175-9642},
	series = {{WEBMEDIA} 2011 – simpósio brasileiro de sistemas multimídia e web},
	author = {Batista, Carlos Eduardo C. F. and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2011},
}

@inproceedings{araujo_suite_2011,
	location = {Florianópolis, Brasil},
	title = {Suíte de testes de conformidade para o ginga-ncl},
	doi = {2175-9642},
	series = {{WEBMEDIA} 2011 – simpósio brasileiro de sistemas multimídia e web},
	author = {Araújo, Eduardo Cruz and Redlich, Luciana Rosa and Lago, Vinícius Carneiro and Moreno, Marcelo Ferreira and Soares, Luiz Fernando Gomes},
	year = {2011},
}

@inproceedings{de_albuquerque_azevedo_textual_2011,
	location = {Lisboa, Portugal},
	title = {Textual authoring of interactive digital {TV} applications},
	isbn = {978-1-4503-0602-7},
	series = {{EuroiTV} 2011},
	author = {de Albuquerque Azevedo, Roberto Gerson and de Salles Soares Neto, Carlos and Teixeira, Mário Meireles and Santos, Rodrigo Costa Mesquita and Gomes, Thiago Alencar},
	year = {2011},
}

@incollection{kulesza_ginga-j_2011,
	location = {Berlin, Heidelberg},
	title = {Ginga-J - An Open Java-Based Application Environment for Interactive Digital Television Services},
	rights = {All rights reserved},
	isbn = {978-3-642-24418-6},
	url = {https://doi.org/10.1007/978-3-642-24418-6_3},
	series = {{IFIP} Advances in Information and Communication Technology},
	abstract = {This paper aims to present a Ginga-J’s reference implementation. Although based on a particular platform, the implementation not only works as a proof of concept, but also raised several issues and difficulties on the software architecture project that should be taken into account to ease extensibility and porting to other platforms. Ginga is the standard middleware for the Brazilian {DTV} System. Its imperative environment (Ginga-J) is based on new {JavaDTV} specification and mandatory for fixed terrestrial receptors.},
	pages = {34--49},
	booktitle = {Open Source Systems: Grounding Research},
	publisher = {Springer},
	author = {Kulesza, Raoni and Lima, Jefferson F. A. and Guedes, Álan L. and Junior, Lucenildo L. A. and Meira, Silvio R. L. and Filho, Guido L. S.},
	editor = {Hissam, Scott A. and Russo, Barbara and de Mendonça Neto, Manoel G. and Kon, Fabio},
	year = {2011},
	langid = {english},
}

This paper aims to present a Ginga-J’s reference implementation. Although based on a particular platform, the implementation not only works as a proof of concept, but also raised several issues and difficulties on the software architecture project that should be taken into account to ease extensibility and porting to other platforms. Ginga is the standard middleware for the Brazilian DTV System. Its imperative environment (Ginga-J) is based on new JavaDTV specification and mandatory for fixed terrestrial receptors.

@article{soares_telemidia_2011,
	title = {{TeleMídia} and 3D Hypermedia Research},
	volume = {2},
	url = {http://www.telemidia.puc-rio.br/sites/telemidia.puc-rio.br/files/JIS_3D.pdf},
	pages = {83--85},
	number = {2},
	journaltitle = {{SBC} Journal on 3D Interactive Systems},
	author = {Soares, Luiz Fernando Gomes and Azevedo, R G A and Moreno, Marcio Ferreira},
	year = {2011},
}

@article{soares_comunicacao_2011,
	title = {A comunicação digital e a interdisciplinaridade na produção de conteúdo interativo},
	volume = {6},
	url = {http://www.mundodigital.unesp.br/revista/index.php/comunicacaomidiatica/article/viewArticle/58/43},
	pages = {p--80},
	number = {1},
	journaltitle = {Revista Comunicação Midiática},
	author = {Soares, Luiz Fernando Gomes and Angeluci, Alan César Belo and Azevedo, Roberto Gerson de Albuquerque},
	urlyear = {2015},
	year = {2011},
}

@inproceedings{moreno_ginga-ncl_2011,
	location = {Honolulu, Estados Unidos},
	title = {Ginga-ncl architecture for plug-ins},
	doi = {DOI: 10.1145/1984708.1984713},
	series = {33rd international conference on software engineering},
	author = {Moreno, Marcio Ferreira and Marinho, Rafael Savignon and Soares, Luiz Fernando Gomes},
	year = {2011},
}

@thesis{lima_eliminando_2011,
	location = {Rio de Janeiro, Brasil},
	title = {Eliminando redundâcias no peril {NCL} {EDTV}},
	url = {http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=18585@1},
	type = {phdthesis},
	author = {Lima, Guilherme Augusto Ferreira},
	year = {2011},
}

@inproceedings{lima_considering_2011,
	location = {{TaiChung}, Taiwan},
	title = {Considering non-functional aspects in the design of hypermedia authoring tools},
	doi = {978-1-4503-0113-8},
	series = {{ACM} symposium on applied computing, {SAC} 2011},
	booktitle = {Proceedings of the 2011 {ACM} Symposium on Applied Computing - {SAC} '11},
	author = {Lima, Bruno Seabra and Soares, Luiz Fernando Gomes and Moreno, Marcelo Ferreira},
	year = {2011},
}

@thesis{lima_composer_2011,
	location = {Rio de Janeiro, Brasil},
	title = {Composer: Aspectos não-funcionais em um ambiente de autoria para aplicações {NCL}},
	url = {http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=18549@1},
	type = {phdthesis},
	author = {Lima, Bruno Seabra},
	year = {2011},
}

@book{soares_programando_2011,
	location = {,},
	edition = {1},
	title = {Programando em {NCL} 3.0 2a. Edição versão 2.1},
	publisher = {Elsevier Campos},
	author = {Soares, Luiz Fernando Gomes and Barbosa, Simone Diniz Junqueira},
	year = {2011},
}

@article{araujo_nested_2011,
	title = {Nested context language 3.0: Parte 14 - suíte de testes de conformidade para o ginga-ncl},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/11_10_araujo.pdf},
	abstract = {This paper describes the development of the compliance test suite for the Ginga-{NCL}, an {ISDB}-{TB} standard for digital terrestrial {TV} and {ITU}-T H.761 Recommendation for {IPTV} services.Both the test suite specification, i.e., the set of its test cases, as the several possibilities for its application are discussed. The peculiarities with regards the development of conformance tests for systems designed for declarative languages are argued, in particular those found in developing tests for middleware systems aiming at {XML}-based declarative environments. In this respect, the paper points out what the proposed suite has brought as contributions to the state of the art. Because it is an extensible suite, the article also brings the rules, adopted by the {ITU}-T, for its extension.},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}10/11},
	author = {Araújo, Eduardo Cruz and Redlich, Luciana Rosa and Lago, Vinícius Carneiro and Moreno, Marcelo Ferreira and Soares, Luiz Fernando Gomes},
	year = {2011},
}

This paper describes the development of the compliance test suite for the Ginga-NCL, an ISDB-TB standard for digital terrestrial TV and ITU-T H.761 Recommendation for IPTV services.Both the test suite specification, i.e., the set of its test cases, as the several possibilities for its application are discussed. The peculiarities with regards the development of conformance tests for systems designed for declarative languages are argued, in particular those found in developing tests for middleware systems aiming at XML-based declarative environments. In this respect, the paper points out what the proposed suite has brought as contributions to the state of the art. Because it is an extensible suite, the article also brings the rules, adopted by the ITU-T, for its extension.

@thesis{de_sousa_junior_uma_2011,
	location = {Rio de Janeiro, Brasil},
	title = {Uma arquitetura para aplicações dinâmicas {NCL} baseadas em famílias de documentos},
	url = {http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19602@1},
	type = {phdthesis},
	author = {de Sousa Júnior, José Geraldo},
	year = {2011},
}

@inproceedings{moreno_uma_2011,
	location = {Campo Grande, Brasil},
	title = {Uma arquitetura orientada a componentes para o middleware ginga},
	doi = {ISSN 2177-496X},
	series = {{XXIX} simpósio brasileiro de redes de computadores e sistemas distribuídos},
	author = {Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes and Cerqueira, Renato},
	year = {2011},
}

@article{soares_variable_2010,
	title = {Variable and state handling in {NCL}},
	volume = {1},
	journaltitle = {Journal of Multimedia Tools and Applications - {MM} Tools\&Applications},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira and Cerqueira, Renato and Barbosa, Simone Diniz Junqueira},
	year = {2010},
}

@inproceedings{moreno_resilient_2010,
	location = {São José, Estados Unidos},
	title = {Resilient hypermedia presentations},
	series = {{XXI} {IEEE} international symposium on software reability engineering},
	author = {Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2010},
}

@thesis{de_albuquerque_azevedo_suporte_2010,
	location = {Rio de Janeiro, Brasil},
	title = {Suporte ao controle e à apresentação de objetos de mídia tridimensionais em {NCL}},
	type = {phdthesis},
	author = {de Albuquerque Azevedo, Roberto Gerson},
	year = {2010},
}

@inproceedings{de_salles_soares_neto_tal_2010,
	location = {Belo Horizonte, Brasil},
	title = {{TAL} - linguagem para autoria de templates de documentos hipermidia},
	series = {{XVI} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2010},
	author = {de Salles Soares Neto, Carlos and Soares, Luiz Fernando Gomes and Souza, Clarisse Sieckenius},
	year = {2010},
}

@inproceedings{lima_towards_2010,
	location = {Belo Horizonte, Brasil},
	title = {Towards the {NCL} raw profile},
	series = {{XVI} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2010},
	author = {Lima, Guilherme Augusto Ferreira and Soares, Luiz Fernando Gomes and de Salles Soares Neto, Carlos and Moreno, Marcio Ferreira and Moreno, Marcelo Ferreira},
	year = {2010},
}

@inproceedings{soares_ncl_2010,
	location = {Belo Horizonte, Brasil},
	title = {{NCL} 3.1 enhanced digital {TV} profile},
	series = {{XVI} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2010},
	author = {Soares, Luiz Fernando Gomes and Lima, Guilherme Augusto Ferreira and de Salles Soares Neto, Carlos},
	year = {2010},
}

@thesis{barbara_aplicacao_2010,
	location = {Rio de Janeiro, Brasil},
	title = {Aplicação adaptativa de guia eletrônico utilizando o ginga-ncl},
	type = {phdthesis},
	author = {Barbara, Felipe Nogueira},
	year = {2010},
}

@article{neto_nested_2010,
	title = {The Nested Context Language reuse features},
	volume = {16},
	doi = {10.1007/s13173-010-0017-z},
	pages = {229--245},
	number = {4},
	journaltitle = {J. Braz. Comp. Soc.},
	author = {Neto, Carlos de Salles Soares and Soares, Luiz Fernando Gomes and Souza, Clarisse Sieckenius de},
	year = {2010},
}

@inproceedings{lima_composer_2010,
	title = {Composer 3: Ambiente de autoria extensível, adaptável e multiplataforma},
	booktitle = {{WebMedia} '10: Proceedings of the 16th Brazilian Symposium on Multimedia and the Web - {II} Workshop de {TV} Digital Interativa - {WTVDI}},
	author = {Lima, Bruno Seabra and de Albuquerque Azevedo, Roberto Gerson and Moreno, Marcelo Ferreira and Soares, Luiz Fernando Gomes},
	year = {2010},
}

@inproceedings{batista_estendendo_2010,
	title = {Estendendo o uso das classes de dispositivos Ginga-{NCL}},
	url = {http://www.lbd.dcc.ufmg.br/colecoes/webmedia/2010/04_webmi_c.pdf},
	booktitle = {{WebMedia} '10: Proceedings of the 16th Brazilian Symposium on Multimedia and the Web},
	publisher = {{XVI} Brazilian Symposium on Multimedia and the web, {WebMedia} ’10},
	author = {Batista, Carlos Eduardo Coelho Freire and Soares, Luiz Fernando Gomes and de Souza Filho, Guido Lemos},
	year = {2010},
}

@inproceedings{moreno_ncl_2010,
	title = {{NCL} and {ITU}-T ' s Standardization Effort on Multimedia Application Frameworks for {IPTV}},
	url = {www.telemidia.puc-rio.br/files/biblio/2010_10_moreno.pdf},
	pages = {1--6},
	author = {Moreno, Marcelo Ferreira and Batista, Carlos Eduardo C F and Fernando, Luiz and Soares, Gomes},
	year = {2010},
}

@article{soares_ginga-ncl_2010,
	title = {Ginga-{NCL}: Declarative Middleware for Multimedia {IPTV} Services},
	volume = {48},
	issn = {0163-6804},
	url = {http://dl.acm.org/citation.cfm?id=1824625.1824637 http://www.telemidia.puc-rio.br/sites/telemidia.puc-rio.br/files/2010_06_soares.pdf},
	doi = {10.1109/MCOM.2010.5473867},
	abstract = {This article presents the innovative features of Ginga-{NCL}, an open middleware specifica- tion for multimedia {IPTV} services. Ginga-{NCL} relies on the Nested Context Language, a domain-specific declarative language targeting multimedia application authoring. As a glue lan- guage, {NCL} relates media objects in time and space without restricting or imposing any media content type, including media objects with imper- ative and declarative code written using other languages. Other {NCL} features include support for multidevice presentations, content adapta- tions, presentation adaptations, and advanced code reuse. Ginga-{NCL} allows {NCL} applications to be modified on the fly by means of live edit- ing commands. Initially defined as the standard middleware for the Brazilian terrestrial {DTV} system, Ginga-{NCL} has recently become part of {ISDB} standards and an {ITU}-T Recommendation for {IPTV} services.},
	pages = {74--81},
	issue = {June},
	journaltitle = {{IEEE} Communications Magazine},
	author = {Soares, Luiz Fernando Gomes and Marcio Ferreira Marcelo and Neto, Carlos de Salles Soares and Moreno, Marcelo Ferreira},
	year = {2010},
}

This article presents the innovative features of Ginga-NCL, an open middleware specifica- tion for multimedia IPTV services. Ginga-NCL relies on the Nested Context Language, a domain-specific declarative language targeting multimedia application authoring. As a glue lan- guage, NCL relates media objects in time and space without restricting or imposing any media content type, including media objects with imper- ative and declarative code written using other languages. Other NCL features include support for multidevice presentations, content adapta- tions, presentation adaptations, and advanced code reuse. Ginga-NCL allows NCL applications to be modified on the fly by means of live edit- ing commands. Initially defined as the standard middleware for the Brazilian terrestrial DTV system, Ginga-NCL has recently become part of ISDB standards and an ITU-T Recommendation for IPTV services.

@inproceedings{de_mello_brandao_extended_2010,
	location = {Zurich, Suiça},
	title = {Extended features for the ginga-ncl environment: Introduction the {LuaTV} {API}},
	series = {International conference on computer communication networks},
	author = {de Mello Brandão, Rafael Rossi and Batista, Carlos Eduardo C. F. and de Souza, Guido Lemos and Soares, Luiz Fernando Gomes},
	year = {2010},
}

@inproceedings{de_sousa_junior_estendendo_2010,
	location = {Belo Horizonte, Brasil},
	title = {Estendendo {NCL}: Objetos {NCLUA} como exibidores para novos tipos de mídia},
	series = {{XVI} simpósio brasileiro de sistemas multimídia e web - {WebMedia} 2010},
	author = {de Sousa Júnior, José Geraldo and de Albuquerque Azevedo, Roberto Gerson and de Salles Soares Neto, Carlos and Soares, Luiz Fernando Gomes},
	year = {2010},
}

@thesis{costa_controle_2010,
	location = {Rio de Janeiro, Brasil},
	title = {Controle do sincronismo temporal de aplicações hipermídia},
	type = {phdthesis},
	author = {Costa, Romualdo Monteiro Resende},
	year = {2010},
}

@thesis{moreno_conciliando_2010,
	location = {Rio de Janeiro, Brasil},
	title = {Conciliando flexibilidade e eficiência no desenvolvimento do ambiente declarativo ginga-ncl},
	type = {phdthesis},
	author = {Moreno, Marcio Ferreira},
	year = {2010},
}

@inproceedings{lima_composer_2010-1,
	location = {Belo Horizonte, Brasil},
	title = {Composer: Ambiente de autoria extensível, adaptável e multiplataforma},
	series = {{XVI} simpósio brasileiro de sistemas multimídia e web - {WebMedia} 2010},
	author = {Lima, Bruno Seabra and de Albuquerque Azevedo, Roberto Gerson and Moreno, Marcelo Ferreira and Soares, Luiz Fernando Gomes},
	year = {2010},
}

@thesis{de_salles_soares_neto_autoria_2010,
	location = {Rio de Janeiro, Brasil},
	title = {Autoria de documentos hipermídia orientada a templates},
	type = {phdthesis},
	author = {de Salles Soares Neto, Carlos},
	year = {2010},
}

@inproceedings{moreno_transmissao_2010,
	location = {Belo Horizonte, Brasil},
	title = {Transmissão de aplicações e comandos de edição ao vivo em {IPTV} e {DTV} terrestre},
	series = {{XVI} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2010},
	author = {Moreno, Marcio Ferreira and Moreno, Marcelo Ferreira and Soares, Luiz Fernando Gomes},
	year = {2010},
}

@article{soares_towards_2010,
	title = {Towards the convergence of digital {TV} systems},
	volume = {1},
	pages = {10},
	journaltitle = {Jornal of Internet Services and Applications},
	author = {Soares, Luiz Fernando Gomes and Moreno, Marcio Ferreira and Costa, Romualdo Monteiro Resende and Moreno, Marcelo Ferreira},
	year = {2010},
}

@inproceedings{moreno_ncl_2010-1,
	location = {Belo Horizonte, Brasil},
	title = {{NCL} and {ITU}-T's standardization effort on multimedia frameworks for {IPTV}},
	series = {{XVI} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2010},
	author = {Moreno, Marcelo Ferreira and Batista, Carlos Eduardo C. F. and Soares, Luiz Fernando Gomes},
	year = {2010},
}

@thesis{marinho_middleware_2010,
	location = {Rio de Janeiro, Brasil},
	title = {Middleware ginga como plugin para navegadores web},
	type = {phdthesis},
	author = {Marinho, Rafael Savignon},
	year = {2010},
}

@inproceedings{soares_relating_2009,
	location = {Munique, Alemanha},
	title = {Relating declarative hypermedia objects and imperative objects through the {NCL} glue language},
	series = {X {ACM} symposium on document engineering - {DocEng}2009},
	author = {Soares, Luiz Fernando Gomes and Moreno, Marcelo Ferreira and Sant'Anna, Francisco},
	year = {2009},
}

@inproceedings{de_salles_soares_neto_reuso_2009,
	location = {Fortaleza, Brasil},
	title = {Reúso e importação em nested context language},
	series = {{XV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2009},
	author = {de Salles Soares Neto, Carlos and Soares, Luiz Fernando Gomes},
	year = {2009},
}

@inproceedings{de_albuquerque_azevedo_uma_2009,
	location = {Fortaleza, Brasil},
	title = {Uma abordagem para autoria textual de documentos hipermídia baseada no uso de visualização programática e navegação hipertextual},
	series = {{XV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2009},
	author = {de Albuquerque Azevedo, Roberto Gerson and Lima, Bruno Seabra and de Salles Soares Neto, Carlos and Teixeira, Mário Meireles},
	year = {2009},
}

@article{de_salles_soares_neto_nested_2009,
	title = {Nested Context Language 3.0: Aplicações declarativas {NCL} com objetos {NCLua} imperativos embutidos},
	abstract = {The Nested Context Language ({NCL}) allows the development of multimedia applications with spatio-temporal synchronization among media objects, such as videos, sounds and images. In order to extend {NCL} with a general purpose programming language, objects written with the Lua language, the so called {NCLua} objects, are also supported. For common media objects, it is the role of the media player to interpret the actions commanded by the {NCL} formatter, such as start and abortion of media presentations. However, for {NCLua} objects, this role is attributed to the object author, which can give any semantics to the commanded actions. An {NCLua} object communicates with the {NCL} document in which it is embedded through events, in accordance with the transitions in its state machine. This technical report describes how {NCLua} objects are developed.},
	author = {de Salles Soares Neto, Francisco Sant'anna Carlos and Barbosa, Simone Diniz Junqueira and Soares, Luiz Fernando Gomes},
	year = {2009},
}

The Nested Context Language (NCL) allows the development of multimedia applications with spatio-temporal synchronization among media objects, such as videos, sounds and images. In order to extend NCL with a general purpose programming language, objects written with the Lua language, the so called NCLua objects, are also supported. For common media objects, it is the role of the media player to interpret the actions commanded by the NCL formatter, such as start and abortion of media presentations. However, for NCLua objects, this role is attributed to the object author, which can give any semantics to the commanded actions. An NCLua object communicates with the NCL document in which it is embedded through events, in accordance with the transitions in its state machine. This technical report describes how NCLua objects are developed.

@article{soares_nested_2009,
	title = {Nested context language 3.0: Reúso e importação},
	abstract = {{NCL}, standard declarative language of the Brazilian Terrestrial Digital {TV} System and {ITU}-T Recommendation for {IPTV} Services, provides a high level of reuse in the design of hypermedia applications. Not only static code reuse is possible, speeding up the application design time and minimizing the probability of programming errors by reusing already tested code spans, but also the reuse of code spans in exeution, making easier the application understanding and the definition of relationships among application's components. Moreover, {NCL} allows not only the reuse inside the same application, but also the reuse among applications, besides the reuse of code spans stored in libraries external to the application. This paper discusses all the features provided by the language and implicitly proposes a methodology to take profit of these features.},
	author = {Soares, Luiz Fernando Gomes and de Salles Soares Neto, Carlos},
	year = {2009},
}

NCL, standard declarative language of the Brazilian Terrestrial Digital TV System and ITU-T Recommendation for IPTV Services, provides a high level of reuse in the design of hypermedia applications. Not only static code reuse is possible, speeding up the application design time and minimizing the probability of programming errors by reusing already tested code spans, but also the reuse of code spans in exeution, making easier the application understanding and the definition of relationships among application's components. Moreover, NCL allows not only the reuse inside the same application, but also the reuse among applications, besides the reuse of code spans stored in libraries external to the application. This paper discusses all the features provided by the language and implicitly proposes a methodology to take profit of these features.

@article{soares_nested_2009-1,
	title = {Nested context language 3.0: Part 13 - ginga-ncl implementors guide v1.0},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/09_13_soares.pdf},
	abstract = {This technical report provides operational guidelines for Ginga-{NCL} middleware implementations aiming at terrestrial and satellital {DTV}, and {IPTV} systems which follows norms {ABNT} 15606.2 and 15606.5, and {ITU}-T recommendation H.761.},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}13/09},
	author = {Soares, Luiz Fernando Gomes and Moreno, Marcelo Ferreira and Costa, Romualdo Resende and de Salles Soares Neto, Carlos and Moreno, Marcio Ferreira and Batista, Carlos Eduardo Freire and Santa'anna, Francisco and Savignon, Rafael and Nogueira, Felipe and Lima, Guilherme F. and Lima, Bruno Seabra and de Albuquerque Azevedo, Roberto Gerson and de Sousa Júnior, José Geraldo and Araújo, Eduardo Cruz and Nagato, Álvaro Veiga dna Felipe},
	year = {2009},
}

This technical report provides operational guidelines for Ginga-NCL middleware implementations aiming at terrestrial and satellital DTV, and IPTV systems which follows norms ABNT 15606.2 and 15606.5, and ITU-T recommendation H.761.

@article{moreno_adaptable_2009,
	title = {Adaptable software components in an eletronic Program/Service guide application architecture for context aware guide presentation},
	volume = {3},
	pages = {13},
	journaltitle = {International Journal of Advanced Media and Communication},
	author = {Moreno, Marcio Ferreira and de Salles Soares Neto, Carlos and Soares, Luiz Fernando Gomes},
	year = {2009},
}

@article{soares_transmissao_2009,
	title = {transmissão de aplicações e comandos de edição ao vivo em sistemas de {TV} digital.},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/09_02_soares.pdf},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}02/09},
	author = {Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2009},
}

@article{soares_nested_2009-2,
	title = {Nested Context Language 3.0 Part 12 – Support to Multiple Exhibition Devices},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/09_03_soares.pdf},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}03/09},
	author = {Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2009},
}

@inproceedings{neto_reuse_2009,
	title = {Reuse and imports in Nested Context Language},
	url = {http://dl.acm.org/citation.cfm?id=1858497},
	pages = {20},
	booktitle = {Proceedings of the {XV} Brazilian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Neto, Carlos de Salles Soares and Soares, Luiz Fernando Gomes},
	urlyear = {2014},
	year = {2009},
}

@article{cruz_tv_2009,
	title = {{TV} Digital Para Dispositivos Portáteis - Middlewares},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/08_03_cruz.pdf},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}03/08},
	author = {Cruz, Vitor Medina and Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2009},
}

@article{soares_nested_2009-3,
	title = {Nested Context Model 3.0: Part 1 – {NCM} Core},
	issn = {0103-9741},
	url = {ftp://obaluae.inf.puc-rio.br/pub/docs/techreports/05_18_soares.pdf},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}18/05},
	author = {Soares, Luiz Fernando Gomes},
	urlyear = {2016},
	year = {2009},
}

@article{soares_tv_2009,
	title = {{TV} interativa se faz com ginga},
	pages = {5},
	journaltitle = {Revista da Sociedade Brasileira de Engenharia de Televisão - Revista da {SET}},
	author = {Soares, Luiz Fernando Gomes},
	year = {2009},
}

@article{soares_tv_2009-1,
	title = {{TV} interactiva se hace com ginga},
	journaltitle = {Revista da Sociedade Brasileira de Engenharia de Televisão},
	author = {Soares, Luiz Fernando Gomes},
	year = {2009},
}

@incollection{santanna_desenvolvimento_2009,
	location = {Fortaleza, Brasil},
	edition = {1},
	title = {Desenvolvimento de aplicações declarativas para {TV} digital no middleware ginga com objetos imperativos lua},
	publisher = {{SBC}},
	author = {Sant'Anna, Francisco and de Salles Soares Neto, Carlos and de Albuquerque Azevedo, Roberto Gerson and Barbosa, Simone Diniz Junqueira},
	year = {2009},
}

@inproceedings{costa_ginga-ncl_2009,
	title = {Ginga-{NCL}: supporting multiple devices},
	url = {http://dl.acm.org/citation.cfm?id=1858483},
	shorttitle = {Ginga-{NCL}},
	pages = {6},
	booktitle = {Proceedings of the {XV} Brazilian Symposium on Multimedia and the Web},
	publisher = {{ACM}},
	author = {Costa, Romualdo Monteiro de Resende and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2009},
}

@inproceedings{costa_ginga-ncl_2009-1,
	location = {Fortaleza, Brasil},
	title = {Ginga-ncl: Suporte a múltiplos dispositivos},
	series = {{XV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2009},
	author = {Costa, Romualdo Monteiro Resende and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2009},
}

@inproceedings{moreno_ginga-ncl_2009,
	location = {Leuven, Bélgica},
	title = {Ginga-ncl: Relating imperative, declarative and media objects},
	series = {European interactive {TV} conference - {EuroITV}2009},
	author = {Moreno, Marcio Ferreira},
	year = {2009},
}

@inproceedings{soares_ginga-ncl_2009,
	location = {Curitiba, Brasil},
	title = {Ginga-ncl y la democratización de la producción de contenido},
	series = {{XXXII} congresso brasileiro de ciências da comunicação - intercom2009},
	author = {Soares, Luiz Fernando Gomes},
	year = {2009},
}

@inproceedings{soares_ginga-ncl_2009-1,
	location = {Curitiba, Brasil},
	title = {Ginga-ncl e a democratização da produção de conteúdo},
	series = {{XXXII} congresso brasileiro de ciências da comunicação - intercom2009},
	author = {Soares, Luiz Fernando Gomes},
	year = {2009},
}

@report{soares_ginga-ncl_2009-2,
	location = {Rio de Janeiro, Brasil},
	title = {{GINGA}-{NCL} - transmissão de aplicações e comandos de edição ao vivo em sistemas de {TV} digital.},
	abstract = {{DTV} applications, with their related media objects, and live editing commands, with their associated parameters, are transmitted embedded in data structures supported by asynchronous transport services that must be defined by each particular {DTV} system. This report proposes several transport alternatives supported by Ginga-{NCL} middleware, stressing their data structures that allow not only mapping the authoring syntax to the transfer syntax without the author's intervention and knowledge, but also improving the transmission and processing performance of {DTV} applications. Although focusing on the Ginga-{NCL} middleware for terrestrial {TV} and {IPTV} systems, the proposed alternatives can be extended to other middlewares.},
	author = {Soares, Luiz Fernando Gomes and Moreno, Marcio Ferreira and Moreno, Marcelo Ferreira},
	year = {2009},
}

DTV applications, with their related media objects, and live editing commands, with their associated parameters, are transmitted embedded in data structures supported by asynchronous transport services that must be defined by each particular DTV system. This report proposes several transport alternatives supported by Ginga-NCL middleware, stressing their data structures that allow not only mapping the authoring syntax to the transfer syntax without the author's intervention and knowledge, but also improving the transmission and processing performance of DTV applications. Although focusing on the Ginga-NCL middleware for terrestrial TV and IPTV systems, the proposed alternatives can be extended to other middlewares.

@article{pimentel_document_2009,
	title = {Document engineering approaches toward scalable and structured multimedia, web and printable documents},
	journaltitle = {Journal of Multimedia Tools and Applications - {MM} Tools\&Applications},
	author = {Pimentel, Maria das Graças Campos and Bulterman, Dick and Soares, Luiz Fernando Gomes},
	year = {2009},
}

@inproceedings{lima_autoria_2009,
	location = {Fortaleza, Brasil},
	title = {Autoria de documentos multimídia baseada na identificação e preenchimento de estruturas recorrentes},
	series = {{XV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2009},
	author = {Lima, Bruno Seabra and de Albuquerque Azevedo, Roberto Gerson and de Salles Soares Neto, Carlos},
	year = {2009},
}

@inproceedings{costa_synchronization_2009,
	location = {Leuven, Bélgica},
	title = {Synchronization management in {DTV} applications},
	series = {European interactive {TV} conference - {EuroITV}2009},
	author = {Costa, Romualdo Monteiro Resende},
	year = {2009},
}

@inproceedings{angeluci_o_2009,
	location = {Bauru, Brasil},
	title = {O uso da linguagem declarativa do ginga-ncl na construção de conteúdos audiovisuais interativos: A experiência do "Roteiros do Dia"},
	series = {I simpósio internacional de televisão digital - {SIMTVD}2009},
	author = {Angeluci, Alan César Belo and de Albuquerque Azevedo, Roberto Gerson and Soares, Luiz Fernando Gomes},
	year = {2009},
}

@article{soares_nested_2009-4,
	title = {Nested context language 3.0: Part 11 – declarative hypermedia objects in {NCL}: Nesting objects with {NCL} code in {NCL} documents},
	issn = {0103-9741},
	url = {ftp://obaluae.inf.puc-rio.br/pub/docs/techreports/09_12_soares.pdf},
	abstract = {This technical report describes how declarative objects, including objects with {NCL} code, may be related with other objects in an {NCL} application, and how declarative object players shall behave. {NCL} (Nested Context Language)is an {XML} application language based on the {NCM} (Nested Context Model) conceptual model for hypermedia document specification, with temporal and spatial synchronization among its media objects.},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}12/09},
	author = {Soares, Luiz Fernando Gomes},
	year = {2009},
}

This technical report describes how declarative objects, including objects with NCL code, may be related with other objects in an NCL application, and how declarative object players shall behave. NCL (Nested Context Language)is an XML application language based on the NCM (Nested Context Model) conceptual model for hypermedia document specification, with temporal and spatial synchronization among its media objects.

@inproceedings{soares_multiple_2009,
	location = {Beijing, China},
	title = {Multiple exhibition devices in {DTV} systems},
	series = {{ACM} international conference on multimedia - {ACMMultimedia}2009},
	author = {Soares, Luiz Fernando Gomes and Costa, Romualdo Monteiro Resende and Moreno, Marcio Ferreira and Moreno, Marcelo Ferreira},
	year = {2009},
}

@inproceedings{batista_linkedtube_2009,
	location = {Fortaleza, Brasil},
	title = {{LinkedTube} - informações semânticas em objetos de mídia da internet},
	series = {{XV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2009},
	author = {Batista, Carlos Eduardo C. F. and Schwabe, Daniel},
	year = {2009},
}

@inproceedings{soares_variable_2009,
	location = {New York, {NY}, {USA}},
	title = {Variable handling in time-based {XML} declarative languages},
	isbn = {978-1-60558-166-8},
	url = {http://doi.acm.org/10.1145/1529282.1529689},
	doi = {10.1145/1529282.1529689},
	series = {{SAC} '09},
	abstract = {This paper focuses on time-based declarative languages. The use of declarative languages has the advantage of their simplicity and their high-level abstraction, usually requiring few or no programming skills. Moreover, in general, declarative languages benefit portability and allow automatic control of application execution temporal flows, without author awareness. However, most time-based declarative languages have limited support for variable definition and manipulation, which causes developers to resort to imperative languages. This paper discusses and proposes an approach for variable handling in {XML}-based declarative languages used for temporal synchronization among media objects that balances flexibility and simplicity. An important goal is to resort to imperative languages only for those applications that require intensive algorithmic computation. The proposed solution was adopted by the {NCL} declarative language of the Brazilian {DTV} System.},
	pages = {1821--1828},
	booktitle = {Proceedings of the 2009 {ACM} symposium on applied computing},
	publisher = {{ACM}},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira and Cerqueira, Renato and Barbosa, Simone Diniz Junqueira},
	year = {2009},
}

This paper focuses on time-based declarative languages. The use of declarative languages has the advantage of their simplicity and their high-level abstraction, usually requiring few or no programming skills. Moreover, in general, declarative languages benefit portability and allow automatic control of application execution temporal flows, without author awareness. However, most time-based declarative languages have limited support for variable definition and manipulation, which causes developers to resort to imperative languages. This paper discusses and proposes an approach for variable handling in XML-based declarative languages used for temporal synchronization among media objects that balances flexibility and simplicity. An important goal is to resort to imperative languages only for those applications that require intensive algorithmic computation. The proposed solution was adopted by the NCL declarative language of the Brazilian DTV System.

@inproceedings{de_salles_soares_neto_linguagens_2008,
	location = {Porto Alegre, Brasil},
	title = {Linguagens computacionais como interfaces: Um estudo com nested context language},
	series = {Simpósio brasileiro de fatores humanos em sistemas computacionais},
	author = {de Salles Soares Neto, Carlos and Souza, Clarisse Sieckenius and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@inproceedings{moreno_uma_2008,
	location = {Vila Velha, Brasil},
	title = {Uma abordagem declarativa para geração e adaptação de aplicações de guias eletrônicos de programação},
	series = {{XIV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2008},
	author = {Moreno, Marcio Ferreira and de Salles Soares Neto, Carlos and Nagato, Felipe and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@article{silva_aprimoramentos_2008,
	title = {Aprimoramentos no {RSVP} para o móbile ipv6},
	abstract = {Internet was originally conceived to offer only a very simple quality of service ({QoS}) support, known as point-to-point best-effort data delivery. As this service model does not attend requisites of real-time applications, the Integrated Services (Int-Serv) model was specified to provide {QoS} support to end-to-end hosts on a network. Among its functionalities, this model incorporates the necessary mechanisms to provide resource reservation control and admission control on network elements. However, the signaling protocol specified to setup resource reservation ({RSVP}) does not operate efficiently with mobile end-to-end hosts. This deficiency and the evolution of mobile networks determined the elaboration of innumerous proposals to enhance {RSVP} with new controls to provide {QoS} guarantees on environments with {IP} mobility. This monograph presents the requirements to provide a service model with {QoS} support to Mobile {IP} and analyses several proposals to enhance {RSVP} based on these requirements.},
	author = {Silva, Anderson Oliveira and Soares, Luiz Fernando Gomes and Colcher, Sérgio},
	year = {2008},
}

Internet was originally conceived to offer only a very simple quality of service (QoS) support, known as point-to-point best-effort data delivery. As this service model does not attend requisites of real-time applications, the Integrated Services (Int-Serv) model was specified to provide QoS support to end-to-end hosts on a network. Among its functionalities, this model incorporates the necessary mechanisms to provide resource reservation control and admission control on network elements. However, the signaling protocol specified to setup resource reservation (RSVP) does not operate efficiently with mobile end-to-end hosts. This deficiency and the evolution of mobile networks determined the elaboration of innumerous proposals to enhance RSVP with new controls to provide QoS guarantees on environments with IP mobility. This monograph presents the requirements to provide a service model with QoS support to Mobile IP and analyses several proposals to enhance RSVP based on these requirements.

@inproceedings{guimaraes_visual_2008,
	location = {São Paulo, Brasil},
	title = {A visual approach for modeling spatiotemporal relations},
	series = {{IX} {ACM} symposium on document engineering - {DocEng}2008},
	author = {Guimarães, Rodrigo Laiola and de Salles Soares Neto, Carlos and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@article{cesar_introduction_2008,
	title = {Introduction to special issue: Human-centered television—directions in interactive digital television research},
	volume = {4},
	url = {http://dl.acm.org/citation.cfm?id=1412197},
	shorttitle = {Introduction to special issue},
	pages = {24},
	number = {4},
	journaltitle = {{ACM} Transactions on Multimedia Computing, Communications, and Applications},
	author = {Cesar, Pablo and Bulterman, Dick {CA} and Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2008},
}

@article{barbosa_tv_2008,
	title = {{TV} digital interativa no Brasil se faz com Ginga: Fundamentos, Padrões, Autoria Declarativa e Usabilidade},
	shorttitle = {{TV} digital interativa no Brasil se faz com Ginga},
	pages = {105--174},
	journaltitle = {atualizações em informática},
	author = {Barbosa, Simone Diniz Junqueira and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@article{cesar_human-centered_2008,
	title = {Human-centered television: Directions in interactive digital television research},
	volume = {4},
	journaltitle = {{ACM} Transactions on Multimedia Computing, Communications and Applications},
	author = {Cesar, Pablo and Bulterman, Dick and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@inproceedings{cruz_ginga-ncl_2008,
	location = {Vila Velha, Brasil},
	title = {Ginga-ncl: Implementação de referência para dispositivos portáteis},
	series = {{XIV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2008},
	author = {Cruz, Vitor Medina and Moreno, Marcio Ferreira and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@thesis{cruz_ginga-ncl_2008-1,
	location = {Rio de Janeiro, Brasil},
	title = {Ginga-ncl para dispositivos portáteis},
	pagetotal = {98},
	type = {phdthesis},
	author = {Cruz, Vitor Medina},
	year = {2008},
}

@thesis{moreno_gerenciamento_2008,
	location = {Rio de Janeiro, Brasil},
	title = {Gerenciamento de recursos dirigido por modelos: Adaptabilidade e interoperabilidade no suporte a {QoS} fim-a-fim},
	type = {phdthesis},
	author = {Moreno, Marcelo Ferreira},
	year = {2008},
}

@article{silva_evolucao_2008,
	title = {Evolução da otimização do handoff no Mobile {IP}},
	abstract = {Mobile {IP} is intended to enable nodes to move from one {IP} subnet to another. Although its architecture be suitable for its purpose, the process associated to node transition among {IP} subnets that change the point of attachment, known as handoff or handover, presents two factors that disturb real-time applications and interactive or delay sensitive ones. The first factor is the high latency of this process that generates a long period of time without receiving packets. The second one refers to the high number of packets dropped or delayed because of the change of the point of attachment. This monograph aims to present the evolution of {MIP} handoff optimization with focus on proposals that were published as {RFCs} and Drafts, also presenting results of researches that demonstrate the effective gain of these optimizations.},
	journaltitle = {Monografia, Pontifícia Universidade Católica, Departamento de Informática},
	author = {Silva, Anderson Oliveira and Colcher, Sérgio},
	year = {2008},
}

Mobile IP is intended to enable nodes to move from one IP subnet to another. Although its architecture be suitable for its purpose, the process associated to node transition among IP subnets that change the point of attachment, known as handoff or handover, presents two factors that disturb real-time applications and interactive or delay sensitive ones. The first factor is the high latency of this process that generates a long period of time without receiving packets. The second one refers to the high number of packets dropped or delayed because of the change of the point of attachment. This monograph aims to present the evolution of MIP handoff optimization with focus on proposals that were published as RFCs and Drafts, also presenting results of researches that demonstrate the effective gain of these optimizations.

@inproceedings{guimaraes_composer_2008,
	location = {Salzburg, Áustria},
	title = {Composer: Authoring tool for {iTV} programs},
	series = {European interactive {TV} conference - {EuroITV}2008},
	author = {Guimarães, Rodrigo Laiola and Costa, Romualdo Monteiro Resende and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@inproceedings{de_salles_soares_neto_autoria_2008,
	location = {Santa Fé, Argentina},
	title = {Autoria orientada a arquétipos para {TV} digital: uma abordagem restritiva e direcionada},
	series = {{XXXIV} conferencia {LatinoAmericana} de informatica},
	author = {de Salles Soares Neto, Carlos and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@article{soares_as_2008,
	title = {As múltiplas possibilidades do middleware ginga},
	journaltitle = {Revista de Comunicação e Técnica Audiovisual},
	author = {Soares, Luiz Fernando Gomes},
	year = {2008},
}

@inproceedings{moreno_sincronismo_2008,
	location = {Vila Velha, Brasil},
	title = {Sincronismo entre fluxos de mídia contínua e aplicações multimídia em redes por difusão},
	series = {{XIV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2008},
	author = {Moreno, Marcio Ferreira and Costa, Romualdo Monteiro Resende and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@article{silva_otimizacao_2008,
	title = {Otimização do handover na camada de rede (L3) utilizando o media independent handover ({MIH})},
	abstract = {The growth of availability of different broadband wireless network technologies increased the interest on seamless heterogeneous handover (vertical handover). To achieve this goal, a Generic Link Layer ({GLL}) was proposed as a reference model to allow the exchange of information between layers 2 and 3. In order to standardize a {GLL}, {IEEE} created a working group to specify the Media Independent Handover ({MIH}), also known as {IEEE} 802.21. As {MIH} information become available, {MIPv}6 and its optimizations, {HMIPv}6 and {FMIPv}6, can reduce L3 handover latency and, as a consequence, packet loss. This monograph aims to present {MIH} specification and the enhancements proposed to handover procedure.},
	author = {Silva, Anderson Oliveira and Endler, Markus and Colcher, Sérgio},
	year = {2008},
}

The growth of availability of different broadband wireless network technologies increased the interest on seamless heterogeneous handover (vertical handover). To achieve this goal, a Generic Link Layer (GLL) was proposed as a reference model to allow the exchange of information between layers 2 and 3. In order to standardize a GLL, IEEE created a working group to specify the Media Independent Handover (MIH), also known as IEEE 802.21. As MIH information become available, MIPv6 and its optimizations, HMIPv6 and FMIPv6, can reduce L3 handover latency and, as a consequence, packet loss. This monograph aims to present MIH specification and the enhancements proposed to handover procedure.

@incollection{de_borba_maranhao_--fly_2008,
	location = {,},
	edition = {1},
	title = {On-the-fly time scaling for compressed audio streams},
	publisher = {Springer Verlag},
	author = {de Borba Maranhão, Suzana Mesquita and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@article{santanna_nested_2008,
	title = {Nested context language 3.0: Part 10 – imperative objects in {NCL}: The {NCLua} scripting language},
	abstract = {This technical report describes how imperative {NCL} objects may be related to other {NCL} objects and how imperative object players shall behave. {NCL} (Nest Context Language) is an {XML} application language based on the {NCM} (Next Context Model) conceptual model for hypermedia document specification, with temporal and spatial synchronization among its media objects. {NCLUA} objects and players are also described as an example. Lua is in the main scripting language of {NCL} and the standard language for the Brazilian {DTV} System.},
	author = {Sant'Anna, Francisco and Soares, Luiz Fernando Gomes and Cerqueira, Renato},
	year = {2008},
}

This technical report describes how imperative NCL objects may be related to other NCL objects and how imperative object players shall behave. NCL (Nest Context Language) is an XML application language based on the NCM (Next Context Model) conceptual model for hypermedia document specification, with temporal and spatial synchronization among its media objects. NCLUA objects and players are also described as an example. Lua is in the main scripting language of NCL and the standard language for the Brazilian DTV System.

@inproceedings{santanna_nclua_2008,
	location = {Vila Velha, Brasil},
	title = {{NCLua} - objetos imperativos lua na linguagem declarativa {NCL}},
	series = {{XIV} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2008},
	author = {Sant'Anna, Francisco and Cerqueira, Renato and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@inproceedings{costa_intermedia_2008,
	location = {São Paulo, Brasil},
	title = {Intermedia synchronization management in {DTV} systems},
	series = {{IX} {ACM} symposium on document engineering - {DocEng}2008},
	author = {Costa, Romualdo Monteiro Resende and Moreno, Marcelo Ferreira and Soares, Luiz Fernando Gomes},
	year = {2008},
}

@incollection{soares_tv_2008,
	location = {Belém, Brasil},
	title = {{TV} digital interativa no brasil se faz com ginga},
	abstract = {This chapter presents the foundations of the Interactive Digital {TV}, the reference standards for Digital {TV} Systems and the Brazilian middleware, Ginga. It introduces the authoring of programs for interactive Digital {TV} using the declarative language {NCL} (Nested Context Language), illustrating the {NCL} usage with various sample applications, and highlighting the language's supporting mechanisms for media synchronization and its tools for the nonlinear editing of programs. The chapter also presents some basic conceps of usability and their applications to the design of interactive digital {TV} programs.},
	author = {Soares, Luiz Fernando Gomes and Barbosa, Simone Diniz Junqueira},
	year = {2008},
}

This chapter presents the foundations of the Interactive Digital TV, the reference standards for Digital TV Systems and the Brazilian middleware, Ginga. It introduces the authoring of programs for interactive Digital TV using the declarative language NCL (Nested Context Language), illustrating the NCL usage with various sample applications, and highlighting the language's supporting mechanisms for media synchronization and its tools for the nonlinear editing of programs. The chapter also presents some basic conceps of usability and their applications to the design of interactive digital TV programs.

@thesis{lima_um_2007,
	location = {Rio de Janeiro, Brasil},
	title = {Um protocolo para descoberta e seleção de recursos em grades móveis ad hoc},
	type = {phdthesis},
	author = {Lima, Luciana dos Santos},
	year = {2007},
}

@incollection{soares_ambiente_2007,
	location = {,},
	edition = {1},
	title = {Ambiente para desenvolvimento de aplicações declarativas para a {TV} digital brasileira},
	author = {Soares, Luiz Fernando Gomes},
	year = {2007},
}

@thesis{rodrigues_ambiente_2007,
	location = {Rio de Janeiro, Brasil},
	title = {Ambiente declarativo para sistemas que implementam o {GEM}},
	type = {phdthesis},
	author = {Rodrigues, Rafael Ferreira},
	year = {2007},
}

@inproceedings{moreno_resource_2007,
	title = {A Resource Identification Mechanism for Interactive {DTV} Systems},
	isbn = {978-0-7695-3084-0},
	url = {http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=4475973},
	doi = {10.1109/ISM.Workshops.2007.44},
	pages = {215--220},
	publisher = {{IEEE}},
	author = {Moreno, Marcio Ferreira and Rodrigues, Rogerio Ferreira and Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2007},
}

@report{soares_fundamentos_2007,
	location = {Rio de Janeiro, Brasil},
	title = {Fundamentos de sistemas multimídia: Part 1 – aquisição, codificação e exibição de dados},
	abstract = {This work comprises the first part of a Multimedia Fundamentals course handouts. It covers data acquisition, coding and exhibition aspects in many representation medias.},
	author = {Soares, Luiz Fernando Gomes},
	year = {2007},
}

This work comprises the first part of a Multimedia Fundamentals course handouts. It covers data acquisition, coding and exhibition aspects in many representation medias.

@article{bachelet_elastic_2007,
	title = {Elastic time computation in {QoS}-Driven hypermedia presentations},
	journaltitle = {{SIGMM} Multimedia System Journal},
	author = {Bachelet, Bruno and Mahey, Philippe and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2007},
}

@thesis{guimaraes_composer_2007,
	location = {Rio de Janeiro, Brasil},
	title = {Composer: um ambiente de autoria de documentos {NCL} para {TV} digital interativa},
	type = {phdthesis},
	author = {Guimarães, Rodrigo Laiola},
	year = {2007},
}

@inproceedings{guimaraes_composer_2007-1,
	location = {Gramado, Brasil},
	title = {Composer: Ambiente de autoria de aplicações declarativas para {TV} digital interativa},
	series = {{XIII} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2007},
	author = {Guimarães, Rodrigo Laiola and Costa, Romualdo Monteiro Resende and Soares, Luiz Fernando Gomes},
	year = {2007},
}

@inproceedings{moreno_arvores_2007,
	location = {Belém, Brasil},
	title = {Árvores de Recursos Virtuais: Um modelo de gerenciamento de recursos fim-a-fim com {QoS}},
	series = {{XXVII} congresso da {SBC}},
	author = {Moreno, Marcelo Ferreira and Colcher, Sérgio and Soares, Luiz Fernando Gomes},
	year = {2007},
}

@inproceedings{soares_tratamento_2007,
	location = {Gramado, Brasil},
	title = {Tratamento de variáveis em linguagens declarativas {XML} baseadas no tempo},
	series = {{XIII} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2007},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira},
	year = {2007},
}

@thesis{da_silva_santos_sistema_2007,
	location = {Rio de Janeiro, Brasil},
	title = {Sistema de controle de versões para edição cooperativa de vídeo {MPEG}-2},
	type = {phdthesis},
	author = {da Silva Santos, Rodrigo Borges},
	year = {2007},
}

@incollection{cesar_present_2007,
	location = {, Estados Unidos},
	edition = {1},
	title = {Present and future of software graphics architectures for {IDTV}},
	author = {Cesar, Pablo and Kaptein, Annelies and Bulterman, Dick and Soares, Luiz Fernando Gomes and Cruz-Lara, Samuel and Backer, Keith},
	year = {2007},
}

@incollection{soares_padroes_2007,
	location = {Brasília, Brasil},
	edition = {1},
	title = {Padrões internacionais, contrapartidas e desenvolvimento nacional},
	author = {Soares, Luiz Fernando Gomes},
	year = {2007},
}

@inproceedings{costa_modelo_2007,
	location = {Gramado, Brasil},
	title = {Modelo temporal hipermídia para suporte a apresentações em ambientes interativos},
	series = {{XIII} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2007},
	author = {Costa, Romualdo Monteiro Resende and Soares, Luiz Fernando Gomes},
	year = {2007},
}

@inproceedings{moreno_mecanismo_2007,
	location = {Belém, Brasil},
	title = {Mecanismo de identificação de recursos para aplicações interativas em redes de {TV} digital por difusão},
	series = {{XXV} simpósio brasileiro de redes de computadores e sistemas distribuídos - {SBRC}2007},
	author = {Moreno, Marcio Ferreira and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2007},
}

@inproceedings{soares_interactive_2007,
	location = {Amsterdam, Netherlands},
	title = {Interactive television in brazil: System software and the digital divide},
	series = {European interactive {TV} conference - {EuroITV}2007},
	author = {Soares, Luiz Fernando Gomes and de Souza, Guido Lemos},
	year = {2007},
}

@article{soares_ginga-ncl_2007,
	title = {Ginga-{NCL}: the declarative environment of the Brazilian digital {TV} system},
	volume = {13},
	shorttitle = {Ginga-{NCL}},
	pages = {37--46},
	number = {1},
	journaltitle = {Journal of the Brazilian Computer Society},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira and Moreno, Márcio Ferreira},
	year = {2007},
}

@thesis{moreno_um_2006,
	location = {Rio de Janeiro, Brasil},
	title = {Um middleware declarativo para sistemas de {TV} digital interativa},
	type = {phdthesis},
	author = {Moreno, Marcio Ferreira},
	year = {2006},
}

@report{lima_wimax_2006,
	location = {Rio de Janeiro, Brasil},
	title = {{WiMAX}: Padrão {IEEE} 802.16 para banda larga sem fio},
	abstract = {The main purpose of this work is to give an overview of {IEEE} 802.16, a standard for wireless broadband access, with a special focus on its mechanism for providing {QoS}. We compare the standards {IEEE} 802.11, {IEEE} 802.16 and {IEEE} 802.20 with the intention to identify the part each standard plays, according to its characteristics, in an integrated wireless network infrastructure, and show how they coexist and complement each other in this network infrastructure. We conclude with some discussion on a general architecture for provision of {QoS} in wireless networks integrating the standards {IEEE} 802.11 and {IEEE} 802.16.},
	author = {Lima, Luciana dos Santos and Soares, Luiz Fernando Gomes and Endler, Markus},
	year = {2006},
}

The main purpose of this work is to give an overview of IEEE 802.16, a standard for wireless broadband access, with a special focus on its mechanism for providing QoS. We compare the standards IEEE 802.11, IEEE 802.16 and IEEE 802.20 with the intention to identify the part each standard plays, according to its characteristics, in an integrated wireless network infrastructure, and show how they coexist and complement each other in this network infrastructure. We conclude with some discussion on a general architecture for provision of QoS in wireless networks integrating the standards IEEE 802.11 and IEEE 802.16.

@thesis{de_borba_maranhao_ajuste_2006,
	location = {Rio de Janeiro, Brasil},
	title = {Ajuste elástico em tempo de exibição para fluxos de áudio comprimido},
	type = {phdthesis},
	author = {de Borba Maranhão, Suzana Mesquita},
	year = {2006},
}

@inproceedings{moreno_adaptable_2006,
	title = {Adaptable resource management based on the virtual resource tree model},
	doi = {10.1109/ICNICONSMCL.2006.40},
	abstract = {This paper presents an abstract model for resource management mechanisms, called Virtual Resource Tree ({VRT}). The {VRT} model is developed aiming at meeting different end-to-end Quality of Service ({QoS}) requirements demanded by multimedia applications. Scalability plays an important role in this scenario, bringing new mandatory features for resource management, such as the distributed management of heterogeneous resources and the support for adapting the different underlying management algorithms. In addition, this paper discusses the main issues towards the definition of the {VRT} file system ({VRT}-{FS}). {VRT}-{FS} is a framework that shows how, with a simple and familiar design, the functionalities of the {VRT} model can be ported to network operating systems.},
	pages = {27--27},
	booktitle = {International conference on networking, international conference on systems and international conference on mobile communications and learning technologies ({ICNICONSMCL}'06)},
	author = {Moreno, Marcelo Ferreira and Colcher, Sérgio and Soares, Luiz Fernando Gomes},
	year = {2006},
}

This paper presents an abstract model for resource management mechanisms, called Virtual Resource Tree (VRT). The VRT model is developed aiming at meeting different end-to-end Quality of Service (QoS) requirements demanded by multimedia applications. Scalability plays an important role in this scenario, bringing new mandatory features for resource management, such as the distributed management of heterogeneous resources and the support for adapting the different underlying management algorithms. In addition, this paper discusses the main issues towards the definition of the VRT file system (VRT-FS). VRT-FS is a framework that shows how, with a simple and familiar design, the functionalities of the VRT model can be ported to network operating systems.

@report{moreno_adaptable_2006-1,
	location = {Rio de Janeiro, Brasil},
	title = {Adaptable resource management base on the virtual resource tree model},
	abstract = {This paper presents an abstract model for resource management mechanisms, called Virtual Resource Tree ({VRT}). The {VRT} model is developed aiming at meeting different end-to-end Quality of Service ({QoS}) requirements demanded by multimedia applications. Scalability plays an important role in this scenario, bringing new mandatory features for resource management, such as the distributed management of heterogeneous resources and the support for adapting the different underlying management algorithms. In addition, this paper discusses the main issues towards the definition of the {VRT} file system ({VRT}-{FS}). {VRT}-{FS} is a framework that shows how, with a simple and familiar design, the functionalities of the {VRT} model can be ported to network operating systems.},
	author = {Moreno, Marcelo Ferreira and Colcher, Sérgio and Soares, Luiz Fernando Gomes},
	year = {2006},
}

This paper presents an abstract model for resource management mechanisms, called Virtual Resource Tree (VRT). The VRT model is developed aiming at meeting different end-to-end Quality of Service (QoS) requirements demanded by multimedia applications. Scalability plays an important role in this scenario, bringing new mandatory features for resource management, such as the distributed management of heterogeneous resources and the support for adapting the different underlying management algorithms. In addition, this paper discusses the main issues towards the definition of the VRT file system (VRT-FS). VRT-FS is a framework that shows how, with a simple and familiar design, the functionalities of the VRT model can be ported to network operating systems.

@article{soares_nested_2006,
	title = {Nested Context Model 3.0 Part 6 – {NCL} (Nested Context Language) Main Profile},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/06_15_soares.pdf},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}15/06},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira and Costa, Romualdo Monteiro de Resende},
	urlyear = {2016},
	year = {2006},
}

@article{soares_nested_2006-1,
	title = {Nested Context Language 3.0 Part 8 – {NCL} Digital {TV} Profiles},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/09_13_soares.pdf},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}13/09},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira},
	urlyear = {2016},
	year = {2006},
}

@inproceedings{de_resende_costa_live_2006,
	location = {New York, {NY}, {USA}},
	title = {Live Editing of Hypermedia Documents},
	isbn = {1-59593-515-0},
	url = {http://doi.acm.org/10.1145/1166160.1166202},
	doi = {10.1145/1166160.1166202},
	abstract = {In some hypermedia system applications, like interactive digital {TV} applications, authoring and presentation of documents may have to be done concomitantly. This is the case of live programs, where not only some contents are not known a priori, but also some temporal and spatial relationships, among program media objects, may have to be established after the unknown content definition. This paper proposes a method for hypermedia document live editing, preserving not only the presentation semantics but also the logical structure semantics defined by an author. To validate this proposal, an implementation has been done for the Brazilian Digital {TV} System, which is also presented.},
	pages = {165--172},
	booktitle = {Proceedings of the 2006 {ACM} Symposium on Document Engineering},
	publisher = {{ACM}},
	author = {de Resende Costa, Romualdo Monteiro and {Marcio Ferreira Moreno} and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2006},
}

In some hypermedia system applications, like interactive digital TV applications, authoring and presentation of documents may have to be done concomitantly. This is the case of live programs, where not only some contents are not known a priori, but also some temporal and spatial relationships, among program media objects, may have to be established after the unknown content definition. This paper proposes a method for hypermedia document live editing, preserving not only the presentation semantics but also the logical structure semantics defined by an author. To validate this proposal, an implementation has been done for the Brazilian Digital TV System, which is also presented.

@article{soares_nested_2006-2,
	title = {Nested Context Language 3.0 Part 9 – {NCL} Live Editing Commands},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/06_36_soares.pdf},
	shorttitle = {Nested Context Language 3.0},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}36/06},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira and Costa, Romualdo Rezende and Moreno, Marcio Ferreira},
	urlyear = {2016},
	year = {2006},
}

@incollection{afonso_human_2006,
	location = {São Paulo, Brasil},
	edition = {1},
	title = {Human development and the {ICT} appropriation.},
	author = {Afonso, Carlos A. and Soares, Luiz Fernando Gomes},
	year = {2006},
}

@report{lima_grades_2006,
	location = {Rio de Janeiro, Brasil},
	title = {Grades sem fio: desenvolvendo aplicações baseadas no compartilhamento de recursos},
	abstract = {Originally, a concept for sharing computing resources among wired participants, grid computing is gradually being extended to support scenarios, including wireless networks, which introduce a variety of novel devices and possible uses. Wireless grids are resource sharing networks spontaneously formed by nomadic devices. In this work we present the main challenges in the development of P2P applications for wireless grid netowrks, focusing on the resource management system.},
	author = {Lima, Luciana dos Santos and Endler, Markus and Soares, Luiz Fernando Gomes and Gomes, Antônio Tadeu Azevedo and Ziviani, Artur},
	year = {2006},
}

Originally, a concept for sharing computing resources among wired participants, grid computing is gradually being extended to support scenarios, including wireless networks, which introduce a variety of novel devices and possible uses. Wireless grids are resource sharing networks spontaneously formed by nomadic devices. In this work we present the main challenges in the development of P2P applications for wireless grid netowrks, focusing on the resource management system.

@incollection{de_salles_soares_neto_desenvolvimento_2006,
	location = {Natal, Brasil},
	edition = {1},
	title = {Desenvolvimento de aplicações declarativas para {TV} digital interativa},
	author = {de Salles Soares Neto, Carlos and Barbosa, Simone Diniz Junqueira and Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira},
	year = {2006},
}

@inproceedings{soares_controle_2006,
	location = {Natal, Brasil},
	title = {Controle de apresentação de aplicações declarativas em receptores de sistemas de {TV} digital interativa},
	series = {{XII} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2006},
	author = {Soares, Luiz Fernando Gomes and Moreno, Marcio Ferreira and Rodrigues, Rogério Ferreira},
	year = {2006},
}

@inproceedings{soares_producao_2006,
	location = {Campo Grande, Brasil},
	title = {Produção de conteúdo declarativo para {TV} digital},
	series = {{XXXIII} seminário integrado de software e hardware},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira},
	year = {2006},
}

@inproceedings{de_borba_maranhao_--fly_2006,
	location = {Barcelona, Espanha},
	title = {On-the-fly time scaling for compressed audio streams},
	series = {International conference on signal processing and multimedia applications},
	author = {de Borba Maranhão, Suzana Mesquita and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2006},
}

@inproceedings{costa_new_2006,
	location = {Beijing, China},
	title = {New facilities for presenting and authoring {MPEG}-4 documents},
	series = {{XII} multimedia modeling conference - {MMM}2006},
	author = {Costa, Romualdo Monteiro Resende and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2006},
}

@inproceedings{soares_maestro_2006,
	location = {Atenas, G'recia},
	title = {{MAESTRO}: The declarative middleware proposal for the {SBTVD}},
	series = {European interactive {TV} conference - {EuroITV}2006},
	author = {Soares, Luiz Fernando Gomes},
	year = {2006},
}

@inproceedings{soares_geracao_2006,
	location = {Natal, Brasil},
	title = {Geração automática de frameworks para processamento de documentos {XML}},
	series = {{XII} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2006},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira and Costa, Romualdo Monteiro Resende},
	year = {2006},
}

@report{soares_recomendacoes_2005,
	location = {Rio de Janeiro, Brasil},
	title = {Recomendações para modelos de referência do Sistema Brasileiro de {TV} Digital},
	abstract = {This report is related to the Brazilian Digital {TV} System recommendations - {SBTVD} - , regarding to the {SBTVD} declarative middleware. In particular, it deals with the problem of media synchronization.},
	author = {Soares, Luiz Fernando Gomes},
	year = {2005},
}

This report is related to the Brazilian Digital TV System recommendations - SBTVD - , regarding to the SBTVD declarative middleware. In particular, it deals with the problem of media synchronization.

@thesis{de_oliveira_e_silva_x-smil_2005,
	location = {Rio de Janeiro, Brasil},
	title = {X-smil: Aumentando reuso e expressividade em linguagens de autoria hipermídia},
	type = {phdthesis},
	author = {de Oliveira e Silva, Heron Vilela},
	year = {2005},
}

@thesis{cavendish_algoritmos_2005,
	location = {Rio de Janeiro, Brasil},
	title = {Algoritmos de ajuste elástico para vídeo em fluxos {MPEG}-2},
	type = {phdthesis},
	author = {Cavendish, Sérgio Alves},
	year = {2005},
}

@inproceedings{de_borba_maranhao_ajuste_2005,
	location = {Poços de Caldas, Brasil},
	title = {Ajuste elástico em tempo real para áudio {MPEG} integrado a um formatador hipermídia},
	series = {{XI} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2005},
	author = {de Borba Maranhão, Suzana Mesquita and Alcaim, Abraham and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2005},
}

@article{soares_nested_2005,
	title = {Nested Context Model 3.0: Part 1 – {NCM} Core (portuguese)},
	issn = {0103-9741},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/05_18_soares-port.pdf},
	shorttitle = {Nested Context Model 3.0},
	journaltitle = {Monographs in Computer Science {PUC}-Rio Inf {MCC}18/05},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira},
	urlyear = {2016},
	year = {2005},
}

@article{leite_flextv_2005,
	title = {{FlexTV} - uma proposta de arquitetura de middleware para o sistema brasileiro de {TV} digital},
	journaltitle = {Revista de Engenharia de Computação e Sistemas Digitais},
	author = {Leite, Luiz Eduardo and Batista, Carlos Eduardo C. F. and de Souza, Guido Lemos and Kulesza, Raoni and Alves, L.G.P. and Bresan, G. and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2005},
}

@report{soares_estado_2005,
	location = {Rio de Janeiro, Brasil},
	title = {Estado da arte em sincronismo de mídias},
	abstract = {This report presents a state of the art on temporal and spatial synchronization in multimedia/hypermedia presentations, focusing on the interactive digital television scenario. The main temporal and spatial sychronization paradigms are presented, as well as the conceptual data models for the applications and the main existent alternatives for synchronization specification. We conclude by presenting a proposal to the Brazilian Digital {TV} System ({SBTVD}).},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira},
	year = {2005},
}

This report presents a state of the art on temporal and spatial synchronization in multimedia/hypermedia presentations, focusing on the interactive digital television scenario. The main temporal and spatial sychronization paradigms are presented, as well as the conceptual data models for the applications and the main existent alternatives for synchronization specification. We conclude by presenting a proposal to the Brazilian Digital TV System (SBTVD).

@inproceedings{moreno_edicao_2005,
	location = {Poços de Caldas, Brasil},
	title = {Edição de documentos hipermídia em tempo de exibição},
	series = {{XI} simpósio brasileiro de sistemas multimídia e web - {WebMedia}2005},
	author = {Moreno, Marcio Ferreira and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2005},
}

@report{lima_desafios_2005,
	location = {Rio de Janeiro, Brasil},
	title = {Desafios no desenvolvimento de aplicações P2P para o compartilhamento de recursos em grades sem fio},
	author = {Lima, Luciana dos Santos and Endler, Markus and Soares, Luiz Fernando Gomes and Gomes, Antônio Tadeu Azevedo and Ziviani, Arthur and Schulze, B.},
	year = {2005},
}

@inproceedings{dos_s_lima_peer--peer_2005,
	location = {New York, {NY}, {USA}},
	title = {Peer-to-peer resource discovery in mobile grids},
	isbn = {1-59593-269-0},
	url = {http://doi.acm.org/10.1145/1101499.1101510},
	doi = {10.1145/1101499.1101510},
	series = {{MGC} '05},
	abstract = {Grids are likely to be the mainstay of distributed computing. Grid was firstly applied as a concept for sharing computing resources among wired nodes, but there has been a growing interest in extending this concept to mobile environments. Although significant work has been done towards mobile grids, much of it has followed centralized approaches based on infrastructured wireless networks. We belive that a less restrictive, decentralized approach that supports mobile collaboration in ad hoc wireless networks can cater for novel grid applications. To address this issue, we propose a middleware architecture called {MoGrid}. {MoGrid} orchestrates the distribution of grid tasks among mobile devices in a peer-to-peer (P2P) fashion. In this paper, we focus on the P2P Discovery Protocol (P2PDP), which is a central element of our architecture. P2PDP aids in distributing tasks among the most resourceful devices, while mitigating the overhead of control messages exchanged among them. We describe a prototype implementation of our architecture and discuss some issues related to the adoption of P2PDP as an ad hoc resource discovery mechanism in mobile grids.},
	pages = {1--6},
	booktitle = {Proceedings of the 3rd international workshop on middleware for grid computing},
	publisher = {{ACM}},
	author = {dos S. Lima, Luciana and Gomes, Antônio T. A. and Ziviani, Artur and Endler, Markus and Soares, Luiz F. G. and Schulze, Bruno},
	year = {2005},
}

Grids are likely to be the mainstay of distributed computing. Grid was firstly applied as a concept for sharing computing resources among wired nodes, but there has been a growing interest in extending this concept to mobile environments. Although significant work has been done towards mobile grids, much of it has followed centralized approaches based on infrastructured wireless networks. We belive that a less restrictive, decentralized approach that supports mobile collaboration in ad hoc wireless networks can cater for novel grid applications. To address this issue, we propose a middleware architecture called MoGrid. MoGrid orchestrates the distribution of grid tasks among mobile devices in a peer-to-peer (P2P) fashion. In this paper, we focus on the P2P Discovery Protocol (P2PDP), which is a central element of our architecture. P2PDP aids in distributing tasks among the most resourceful devices, while mitigating the overhead of control messages exchanged among them. We describe a prototype implementation of our architecture and discuss some issues related to the adoption of P2PDP as an ad hoc resource discovery mechanism in mobile grids.

@thesis{gomes_lindax_2005,
	location = {Rio de Janeiro, Brasil},
	title = {{LindaX}: Uma linguagem de descrição de sistemas de comunicação adaptáveis},
	type = {phdthesis},
	author = {Gomes, Antônio Tadeu Azevedo},
	year = {2005},
}

@thesis{costa_integracao_2005,
	location = {Rio de Janeiro, Brasil},
	title = {Integração e interoperabilidade de documentos {MPEG}-4 e {NCL}},
	type = {phdthesis},
	author = {Costa, Romualdo Monteiro Resende},
	year = {2005},
}

@book{colcher_voip_2005,
	location = {Rio de Janeiro, Brasil},
	edition = {1},
	title = {{VOIP}: Voz sobre {IP}},
	author = {Colcher, Sérgio and Soares, Luiz Fernando Gomes and de Souza, Guido Lemos and Gomes, Antônio Tadeu Azevedo and Silva, Anderson Oliveira},
	year = {2005},
}

@inproceedings{gomes_uma_2005,
	location = {Fortaleza, Brasil},
	title = {Uma abordagem de especificação e imposição de restrições de reconfiguração em redes programáveis},
	series = {{XXIII} simpósio brasileiro de redes de computadores - {SBRC}2005},
	author = {Gomes, Antônio Tadeu Azevedo and Soares, Luiz Fernando Gomes},
	year = {2005},
}

@inproceedings{moreno_qososlinux_2004,
	location = {Salvador, Brasil},
	title = {{QoSOSLinux}: Desenvolvimento de uma extensão Linux com suporte adequado a qualidade de serviço},
	series = {{WorkShop} de sistemas operacionais},
	author = {Moreno, Marcelo Ferreira and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@inproceedings{costa_armazenamento_2004,
	location = {Ribeirão Preto, Brasil},
	title = {Armazenamento e distribuição de documentos {NCL} através do padrão {MPEG}-4},
	series = {X simpósio brasileiro de sistemas multimídia e web - {WebMedia}2004},
	author = {Costa, Romualdo Monteiro Resende and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@inproceedings{de_salles_soares_neto_architectural_2004,
	location = {Brisbane, Austrália},
	title = {Architectural description of {QoS} provisioning for multimedia application support},
	series = {X multimedia modeling conference - {MMM}2004},
	author = {de Salles Soares Neto, Carlos and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@inproceedings{rodrigues_apresentacoes_2004,
	location = {Salvador, Brasil},
	title = {Apresentações hipermídia apoiadas por uma ferramenta de animação facial},
	series = {Seminário integrado de software e hardware},
	author = {Rodrigues, Rogério Ferreira and Rodrigues, Paula Salgado Lucena and Feijó, Bruno and Velho, Luiz and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@inproceedings{rodrigues_cross-media_2004,
	location = {Eindhoven, Netherlands},
	title = {Cross-media and elastic time adaptive presentations: the integration of a talking head tool into a hypermedia formatter},
	series = {Adaptive hypermedia 2004},
	author = {Rodrigues, Rogério Ferreira and Rodrigues, Paula Salgado Lucena and Feijó, Bruno and Velho, Luiz and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@article{medina_automatic_2004,
	title = {Automatic scheduling of hypermedia documents with elastic times},
	volume = {14},
	pages = {14},
	journaltitle = {Parallel Processing Letters - {PPL}},
	author = {Medina, M.T. and Ribeiro, C.C. and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@inproceedings{de_oliveira_e_silva_smil_2004,
	location = {Ribeirão Preto, Brasil},
	title = {{SMIL} + {XTemplate}},
	series = {X simpósio brasileiro de sistemas multimídia e web - {WebMedia}2004},
	author = {de Oliveira e Silva, Heron Vilela and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@inproceedings{de_oliveira_e_silva_ncl_2004,
	location = {Milwaukee, {EUA}},
	title = {{NCL} 2.0: Integrating new concepts to {XML} modular languages},
	series = {V {ACM} symposium on document engineering},
	author = {de Oliveira e Silva, Heron Vilela and Saade, Débora Christina Muchaluat and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@inproceedings{costa_integrando_2004,
	location = {Ribeirão Preto, Brasil},
	title = {Integrando o padrão {MPEG}-4 e o ambiente {NCL}},
	series = {X simpósio brasileiro de sistemas multimídia e web - {WebMedia}2004},
	author = {Costa, Romualdo Monteiro Resende and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@inproceedings{coelho_integracao_2004,
	location = {Ribeirão Preto, Brasil},
	title = {Integração de ferramentas gráficas e declarativas na autoria de arquiteturas modeladas através de grafos compostos},
	series = {X simpósio brasileiro de sistemas multimídia e web - {WebMedia}2004},
	author = {Coelho, Rogerio Miguel and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2004},
}

@thesis{coelho_integracao_2004-1,
	location = {Rio de Janeiro, Brasil},
	title = {Integração de ferramentas gráficas e declarativas na autoria de arquiteturas modeladas através de grafos compostos (thesis)},
	type = {phdthesis},
	author = {Coelho, Rogerio Miguel},
	year = {2004},
}

@thesis{saade_relacoes_2003,
	location = {Rio de Janeiro, Brasil},
	title = {Relações em linguagens de autoria hipermídia: Aumentando reuso e expressividade},
	type = {phdthesis},
	author = {Saade, Débora Christina Muchaluat},
	year = {2003},
}

@inproceedings{moreno_provisao_2003,
	location = {Natal, Brasil},
	title = {Provisão de {QoS} adaptável em sistemas operacionais: o subsistema de rede},
	series = {{XXI} simpósio brasileiro de redes de computadores - {SBRC}2003},
	author = {Moreno, Marcelo Ferreira and Gomes, Antônio Tadeu Azevedo and Colcher, Sérgio and Soares, Luiz Fernando Gomes},
	year = {2003},
}

@inproceedings{rodrigues_provisao_2003,
	location = {Salvador, Brasil},
	title = {Provisão de {QoS} inter e intra objetos de mídia em formatadores adaptativos},
	series = {{IX} simpósio brasileiro de sistemas multimídia e {WEB} - {WebMedia}2003},
	author = {Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2003},
}

@thesis{saade_relations_2003,
	location = {Rio de Janeiro, brasil},
	title = {Relations in hypermedia authoring languages: Improving reuse and expressiveness},
	type = {phdthesis},
	author = {Saade, Débora Christina Muchaluat},
	year = {2003},
}

@article{moreno_qosos_2003,
	title = {{QoSOS}: An adaptable architecture for {QoS} provisioning in network operating systems},
	volume = {18},
	number = {2},
	journaltitle = {Revista da Sociedade Brasileira de Telecomunicaçõe},
	author = {Moreno, Marcelo Ferreira and de Salles Soares Neto, Carlos and Gomes, Antônio Tadeu Azevedo and Soares, Luiz Fernando Gomes and Colcher, Sérgio},
	year = {2003},
}

@report{gomes_component-based_2003,
	location = {Rio de Janeiro, Brasil},
	title = {A component-based approach to the creation and deployment of network services in the programmable internet},
	abstract = {Dynamism and simplicity in service creation and service deployment are recurring preoccupations to service designers. Although significant research has been carried out in both areas, we belive there remains a need for a better integration of them. The present work is an effort to apply component-based software concepts 'anywhere', from high-level service specifications to low-level software implementation in programmable network devices. This paper presents {LindaX}, an architecture description language that aims at guiding designers through the use of these concepts in a principled way.},
	author = {Gomes, Antônio Tadeu Azevedo and Coulson, Geoff and Blair, Gordon Shaw and Soares, Luiz Fernando Gomes},
	year = {2003},
}

Dynamism and simplicity in service creation and service deployment are recurring preoccupations to service designers. Although significant research has been carried out in both areas, we belive there remains a need for a better integration of them. The present work is an effort to apply component-based software concepts 'anywhere', from high-level service specifications to low-level software implementation in programmable network devices. This paper presents LindaX, an architecture description language that aims at guiding designers through the use of these concepts in a principled way.

@article{muchaluat-saade_xconnector_2003,
	title = {{XConnector} and {XTemplate}: Improving the Expressiveness and Reuse in Web Authoring Languages},
	volume = {8},
	issn = {1361-4568},
	url = {http://dx.doi.org/10.1080/13614560208914739},
	doi = {10.1080/13614560208914739},
	shorttitle = {{XConnector} and {XTemplate}},
	abstract = {Despite recent efforts made by the W3C, web-authoring languages still need to be enhanced. Aiming at this goal, this paper presents proposals for improving their expressiveness and reuse. The proposals are based on an {XML} language called {XConnector}, which provides for the creation of complex referential and multimedia synchronization relations. {XConnector} can be used for improving the expressiveness of either linking languages, such as {XLink}, or linking modules of hypermedia authoring languages, such as {XHTML} or {SMIL}. The novel contribution of this paper is another {XML} language called {XTemplate}, which provides for the creation of hypermedia composite templates. A composite template specifies types of components, types of relations, components and relationships that a hypermedia composition has or may have, without identifying what all the components and relationships are. Templates are traditionally used for improving reuse. Composite templates allow the definition of common structures, which can be seen as representing types of compositions with specific semantics given by the set of defined relationships. Therefore, composite templates could be used to provide new time containers in web languages, besides the well known par, seq and excl provided by {SMIL} 2.0. The paper also presents how composite templates are used in the {HyperProp} hypermedia system and proposes an extension to {XLink} to incorporate facilities provided by {XConnector} and {XTemplate}, improving its expressiveness and reuse.},
	pages = {139--169},
	number = {1},
	journaltitle = {New Rev. Hypermedia Multimedia},
	author = {Muchaluat-Saade, Débora Christina and Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2003},
}

Despite recent efforts made by the W3C, web-authoring languages still need to be enhanced. Aiming at this goal, this paper presents proposals for improving their expressiveness and reuse. The proposals are based on an XML language called XConnector, which provides for the creation of complex referential and multimedia synchronization relations. XConnector can be used for improving the expressiveness of either linking languages, such as XLink, or linking modules of hypermedia authoring languages, such as XHTML or SMIL. The novel contribution of this paper is another XML language called XTemplate, which provides for the creation of hypermedia composite templates. A composite template specifies types of components, types of relations, components and relationships that a hypermedia composition has or may have, without identifying what all the components and relationships are. Templates are traditionally used for improving reuse. Composite templates allow the definition of common structures, which can be seen as representing types of compositions with specific semantics given by the set of defined relationships. Therefore, composite templates could be used to provide new time containers in web languages, besides the well known par, seq and excl provided by SMIL 2.0. The paper also presents how composite templates are used in the HyperProp hypermedia system and proposes an extension to XLink to incorporate facilities provided by XConnector and XTemplate, improving its expressiveness and reuse.

@inproceedings{lima_um_2003,
	location = {Natal, Brasil},
	title = {Um framework para provisão de {QoS} em redes móveis sem fio},
	series = {{XXI} simpósio brasileiro de redes de computadores - {SBRC}2003},
	author = {Lima, Luciana dos Santos and Gomes, Antônio Tadeu Azevedo and Colcher, Sérgio and Soares, Luiz Fernando Gomes},
	year = {2003},
}

@inproceedings{soares_hypermedia_2003,
	location = {Nice, França},
	title = {Hypermedia synchronization: Modeling and optimization with graphs},
	series = {{XVIII} conference on system modelling and optimization - ifip2003},
	author = {Soares, Luiz Fernando Gomes},
	year = {2003},
}

@thesis{rolins_um_2003,
	location = {Rio de Janeiro, Brasil},
	title = {Um framework para gerência de contexto orientado a sistemas hipermídia adaptativos},
	type = {phdthesis},
	author = {Rolins, Claudia Alvarez},
	year = {2003},
}

@thesis{rodrigues_formatacao_2003,
	location = {Rio de Janeiro, Brasil},
	title = {Formatação e controle de apresentações hipermídia com mecanismos de adaptação temporal},
	type = {phdthesis},
	author = {Rodrigues, Rogério Ferreira},
	year = {2003},
}

@inproceedings{rodrigues_expressive_2003,
	location = {Salvador, Brasil},
	title = {Expressive talking heads: uma ferramenta com fala e expressão facial sincronizadas para o desenvolvimento de aplicações interativas},
	series = {{IX} simpósio brasileiro de sistemas multimídia e {WEB} - {WebMedia}2003},
	author = {Rodrigues, Paula Salgado Lucena and Velho, Luiz},
	year = {2003},
}

@inproceedings{de_salles_soares_neto_descricao_2003,
	location = {Salvador, Brasil},
	title = {Descrição arquitetural da provisão de {QoS} para suporte a aplicações multimídia},
	series = {{IX} simpósio brasileiro de sistemas multimídia e {WEB} - {WebMedia}2003},
	author = {de Salles Soares Neto, Carlos and Moreno, Marcelo Ferreira and Gomes, Antônio Tadeu Azevedo and Soares, Luiz Fernando Gomes},
	year = {2003},
}

@thesis{de_salles_soares_neto_descricao_2003-1,
	location = {Rio de Janeiro, Brasil},
	title = {Descrição arquitetural da provisão de {QoS} em ambientes genéricos de processamento e comunicação},
	type = {phdthesis},
	author = {de Salles Soares Neto, Carlos},
	year = {2003},
}

@inproceedings{saade_linguagem_2003,
	location = {Salvador, Brasil},
	title = {Linguagem {NCL} versão 2.0 para autoria declarativa de documentos hipermídia},
	series = {{IX} simpósio brasileiro de sistemas multimídia e {WEB} - {WebMedia}2003},
	author = {Saade, Débora Christina Muchaluat and de Oliveira e Silva, Heron Vilela and Soares, Luiz Fernando Gomes},
	year = {2003},
}

@inproceedings{rodrigues_inter_2003,
	location = {Grenoble, França},
	title = {Inter and intra media-object {QoS} provisioning in adaptive formatters},
	series = {{IV} {ACM} symposium on document engineering - {DocEng}2003},
	author = {Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2003},
}

@thesis{moreno_um_2002,
	location = {Rio de Janeiro, Brasil},
	title = {Um framework para provisão de {QoS} em sistemas operacionais},
	type = {phdthesis},
	author = {Moreno, Marcelo Ferreira},
	year = {2002},
}

@inproceedings{soares_uma_2002,
	location = {Fortaleza, Brasil},
	title = {Uma arquitetura genérica para implementação de mecanismos de pré-busca em apresentações hipermídia},
	series = {{VIII} simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}2002},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira},
	year = {2002},
}

@inproceedings{rodrigues_framework_2002,
	location = {Newport Beach, {EUA}},
	title = {A framework for prefetching mechanisms in hypermedia presentations},
	series = {{IEEE} 4th international symposium on multimedia software engineering},
	author = {Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2002},
}

@inproceedings{saade_xconnector_2002,
	location = {Fortaleza, Brasil},
	title = {{XConnector} e {XTemplate}: Estendendo {XLink} para aumentar expressividade e reuso},
	series = {{VIII} simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}2002},
	author = {Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes},
	year = {2002},
}

@inproceedings{saade_xconnector_2002-1,
	location = {{McLean}, {EUA}},
	title = {{XConnector}: Extending {XLink} to provide multimedia synchronization},
	series = {{II} {ACM} symposium on document engineering - {DocEng}2002},
	author = {Saade, Débora Christina Muchaluat and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2002},
}

@article{rodrigues_improving_2002,
	title = {Improving {SMIL} with {NCM} facilities},
	journaltitle = {Journal of Multimedia Tools and Applications},
	author = {Rodrigues, Leandro Marques and Rodrigues, Rogério Ferreira and Antonacci, Meire Juliana and Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes},
	year = {2002},
}

@thesis{lima_um_2002,
	location = {Rio de Janeiro, Brasil},
	title = {Um framework para provisão de {QoS} em redes móveis sem fio (thesis)},
	type = {phdthesis},
	author = {Lima, Luciana dos Santos},
	year = {2002},
}

@thesis{mota_uma_2001,
	location = {Rio de Janeiro, Brasil},
	title = {Uma arquitetura adaptável para provisão de {QoS} na internet (thesis)},
	type = {phdthesis},
	author = {Mota, Oscar Thyago José D. D. Lisbôa},
	year = {2001},
}

@thesis{de_moura_relacoes_2001,
	location = {Rio de Janeiro, Brasil},
	title = {Relações espaciais em documentos hipermídia},
	type = {phdthesis},
	author = {de Moura, Marcel Stanley Albuquerque},
	year = {2001},
}

@thesis{martinez_algoritmos_2001,
	location = {Rio de Janeiro, Brasil},
	title = {Algoritmos para {QoS} em redes de computadores},
	type = {phdthesis},
	author = {Martínez, Marta Emília Barría},
	year = {2001},
}

@inproceedings{martinez_reliable_2001,
	location = {Budapest, Hungria},
	title = {A reliable multicast algorithm based on recovery tree ({RMART})},
	series = {{IX} {IFIP} conference on performance and evaluation of {ATM} \& {IP} networks},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo and Soares, Luiz Fernando Gomes},
	year = {2001},
}

@inproceedings{rodrigues_framework_2001,
	location = {Amsterdam, Netherlands},
	title = {A framework for event-driven hypermedia presentation systems},
	series = {{VIII} multimedia modeling conference - {MMM}2001},
	author = {Rodrigues, Rogério Ferreira and Rodrigues, Leandro Marques and Soares, Luiz Fernando Gomes},
	year = {2001},
}

@inproceedings{muchaluat-saade_towards_2001,
	location = {New York, {NY}, {USA}},
	title = {Towards the Convergence Between Hypermedia Authoring Languages and Architecture Description Languages},
	isbn = {1-58113-432-0},
	url = {http://doi.acm.org/10.1145/502187.502195},
	doi = {10.1145/502187.502195},
	abstract = {This paper presents a detailed comparison between the structural elements and definitions provided by Hypermedia Authoring Languages and Architecture Description Languages ({ADL}). {ADLs} are formal languages that can be used for representing a software architecture. Although it may look trivial to make a direct correspondence between {ADL} and hypermedia structural entities, such as components to nodes and connectors to links, interesting differences can be identified when observing them more closely. Based on the comparison results, a structural meta-model that can be specialized for use in both domains is proposed. Furthermore, the paper also presents an example of how the meta-model can be used for describing hypermedia document structures, showing how some features found in {ADLs} can be applied to hypermedia authoring languages. Our final goal is to integrate the contributions of document engineering and software architecture engineering and take advantage of the advances of one area in the other one. The current paper is the first step towards this direction.},
	pages = {48--57},
	booktitle = {Proceedings of the 2001 {ACM} Symposium on Document Engineering},
	publisher = {{ACM}},
	author = {Muchaluat-Saade, Débora Christina and Soares, Luiz Fernando Gomes},
	urlyear = {2015},
	year = {2001},
}

This paper presents a detailed comparison between the structural elements and definitions provided by Hypermedia Authoring Languages and Architecture Description Languages (ADL). ADLs are formal languages that can be used for representing a software architecture. Although it may look trivial to make a direct correspondence between ADL and hypermedia structural entities, such as components to nodes and connectors to links, interesting differences can be identified when observing them more closely. Based on the comparison results, a structural meta-model that can be specialized for use in both domains is proposed. Furthermore, the paper also presents an example of how the meta-model can be used for describing hypermedia document structures, showing how some features found in ADLs can be applied to hypermedia authoring languages. Our final goal is to integrate the contributions of document engineering and software architecture engineering and take advantage of the advances of one area in the other one. The current paper is the first step towards this direction.

@inproceedings{saade_hypermedia_2001,
	location = {Amsterdam, Netherlands},
	title = {Hypermedia spatio-temporal synchronization relations also deserve first class status},
	series = {{VIII} multimedia modeling conference - {MMM}2001},
	author = {Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes},
	year = {2001},
}

@thesis{de_campos_gorini_um_2001,
	location = {Rio de Janeiro, Brasil},
	title = {Um ambiente de suporte à autoria cooperativa de documentos hipermídia},
	type = {phdthesis},
	author = {de Campos Gorini, Renata Abrantes},
	year = {2001},
}

@thesis{junior_especificacao_2001,
	location = {Rio de Janeiro, Brasil},
	title = {Especificação de um protocolo de comunicação hipermídia com qualidade de serviço e modularidade funcional},
	type = {phdthesis},
	author = {Júnior, Antônio Benedito Coimbra S.},
	year = {2001},
}

@report{rodrigues_elastic_2001,
	location = {Rio de Janeiro, Brasil},
	title = {Elastic time computations for hypermedia documents},
	abstract = {This paper presents a new elastic time algorithm for adjusting hypermedia document presentation in order to avoid temporal inconsistencies. The algorithm explores the flexibility offered by some hypermedia models in the definition of media object duration and uses this flexibility for choosing the objects to be stretched or shrunk in such a way that the best possible quality of presentation is obtained. Our proposal is based on the "out-of-killer" method for minimum-cost flow problems and it seems to offer more flexibility to model real-time applications in comparison with other previous proposals based on the simplex method.},
	author = {Rodrigues, Rogério Ferreira and Bachelet, Bruno and Mahey, Philippe and Soares, Luiz Fernando Gomes},
	year = {2001},
}

This paper presents a new elastic time algorithm for adjusting hypermedia document presentation in order to avoid temporal inconsistencies. The algorithm explores the flexibility offered by some hypermedia models in the definition of media object duration and uses this flexibility for choosing the objects to be stretched or shrunk in such a way that the best possible quality of presentation is obtained. Our proposal is based on the "out-of-killer" method for minimum-cost flow problems and it seems to offer more flexibility to model real-time applications in comparison with other previous proposals based on the simplex method.

@inproceedings{rodrigues_desenvolvimento_2001,
	location = {Florianopólis, Brasil},
	title = {Desenvolvimento e integração de ferramentas de exibição em sistemas de apresentação hipermídia},
	series = {{VII} simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}2001},
	author = {Rodrigues, Rogério Ferreira and Rodrigues, Leandro Marques and Soares, Luiz Fernando Gomes},
	year = {2001},
}

@inproceedings{saade_towards_2001,
	location = {Atlanta, {EUA}},
	title = {Towards the convergence between hypermedia authoring languages and architectural description languages},
	series = {I {ACM} symposium on document engineering - {DocEng}2001},
	author = {Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes},
	year = {2001},
}

@inproceedings{gomes_towards_2001,
	location = {Colmar, França},
	title = {Towards a descriptive approach to model adaptable communication environments},
	series = {{IEEE} international conference on network - {ICN}2001},
	author = {Gomes, Antônio Tadeu Azevedo and Colcher, Sérgio and Soares, Luiz Fernando Gomes},
	year = {2001},
}

@article{janeiro_meta-gerencia_2001,
	title = {Meta-Gerência de Agentes Procuradores Usando {SNMP}},
	journaltitle = {. {XI} Workshop de Gerência e Operação de Redes e Serviços},
	author = {Janeiro, Jordan and da Silva, Anderson Oliveira and Colcher, Sérgio},
	year = {2001},
}

@inproceedings{gomes_modeling_2001,
	location = {Helsink, Finlândica},
	title = {Modeling {QoS} provision on adaptable communication environments},
	volume = {4},
	pages = {1221--1226},
	booktitle = {{ICC} 2001. {IEEE} International Conference on Communications. Conference Record (Cat. No. 01CH37240)},
	publisher = {{IEEE}},
	author = {Gomes, Antônio Tadeu A. and Colcher, Sérgio and Soares, Luiz Fernando Gomes},
	year = {2001},
}

@report{felix_validating_2001,
	location = {Rio de Janeiro, Brasil},
	title = {Validating hypermedia documents: a timed automata approach},
	abstract = {This paper presents a formal approach to validating hypermedia documents, a case of real-time and reactive computing application, aiming to extend these ideas to the contex of architectural design. The main aspect of hypermedia validation concerns to the so-called temporal consistency analysis problem: a document is consistent if it is possible present it in a way that all the event synchronization constraints can be fulfilled. The validation technique consists in providing formal semantics to hypermedia documents via network of timed-automata, in a compositional way. Therefore, obtained a behavioral model of the document, we can pass to the model-checking phase. The consistency analysis consists on to formulate an adequate set of temporal logic formulas that will be checked against to the automata model. The specifications of the hypermedia documents that we are written using the modeling concepts of {NCM} (Nested Context Model), a conceptual model to hypermedia documents, and we choose {UPPAAL} as the model-checking tool to implement the our hypermedia validation model. This work as well constitutes a preliminary investigation, via a case study, about how we can integrate formal validation, using model-checking techniques, with software architecture design.},
	author = {Felix, M.F. and Haeusler, Edward Hermann and Soares, Luiz Fernando Gomes},
	year = {2001},
}

This paper presents a formal approach to validating hypermedia documents, a case of real-time and reactive computing application, aiming to extend these ideas to the contex of architectural design. The main aspect of hypermedia validation concerns to the so-called temporal consistency analysis problem: a document is consistent if it is possible present it in a way that all the event synchronization constraints can be fulfilled. The validation technique consists in providing formal semantics to hypermedia documents via network of timed-automata, in a compositional way. Therefore, obtained a behavioral model of the document, we can pass to the model-checking phase. The consistency analysis consists on to formulate an adequate set of temporal logic formulas that will be checked against to the automata model. The specifications of the hypermedia documents that we are written using the modeling concepts of NCM (Nested Context Model), a conceptual model to hypermedia documents, and we choose UPPAAL as the model-checking tool to implement the our hypermedia validation model. This work as well constitutes a preliminary investigation, via a case study, about how we can integrate formal validation, using model-checking techniques, with software architecture design.

@inproceedings{mota_uma_2001-1,
	title = {Uma arquitetura adaptável para provisão de {QoS} na internet},
	booktitle = {Anais do {XIX} Simpósio Brasileiro de Redes de Computadores ({SBRC}), Florianópolis, {SC}},
	author = {Mota, {OTJDDL} and Gomes, Antônio Tadeu A. and Colcher, Sérgio and Soares, Luiz Fernando G.},
	year = {2001},
}

@article{colcher_um_2000,
	title = {Um meta modelo para a engenharia de serviços de telecomunicações},
	journaltitle = {{XVIII} Simpósio Brasileiro de Redes de Computadores ({SBRC}’2000)},
	author = {{COLCHER}, {SÉRGIO} and {GOMES}, {ANTÔNIO} {TADEU} A. and {SOARES}, {LUIZ} {FERNANDO} G.},
	year = {2000},
}

@inproceedings{de_moura_smmm_2000,
	location = {Nova Iorque, {EUA}},
	title = {{SMMM} - a secure multimedia mail system},
	series = {International conference on multimedia and exposition - {ICME}2000},
	author = {de Moura, Marcel Stanley Albuquerque and de Souza, Guido Lemos and Batista, Thaís Vasconcelos and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@inproceedings{martinez_algoritmo_2000,
	location = {Cidade do México, México},
	title = {Algoritmo para la recuperación de errores de una transmisión multipunto},
	series = {{VIII} congresso iberoamericano de educación superior en computación - {CLEI}2000},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@inproceedings{bachelet_elastic_2000,
	location = {Natal, Brasil},
	title = {Elastic time computation for hypermedia documents},
	series = {{VI} simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}2000},
	author = {Bachelet, Bruno and Mahey, Philippe and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@thesis{pinto_autoria_2000,
	location = {Rio de Janeiro, Brasil},
	title = {Autoria gráfica de estruturas de documentos hipermídia no sistema {HyperProp}},
	type = {phdthesis},
	author = {Pinto, Luis Arthur F.},
	year = {2000},
}

@inproceedings{campos_transmissao_2000,
	location = {Belo Horizonte, Brasil},
	title = {Transmissão de fluxos de vídeo {MPEG}-2 sobre redes {ATM}},
	series = {{II} workshop dos consórcios {REMAV}},
	author = {Campos, Luciano Junqueira and Gomes, Antônio Tadeu Azevedo and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@inproceedings{campos_sincronismo_2000,
	location = {Cidade do México, México},
	title = {Sincronismo de vídeo {MPEG}-2 {VBR} sobre redes {ATM}},
	series = {{VIII} congresso iberoamericano de educación superior en computación - {CLEI}2000},
	author = {Campos, Luciano Junqueira and Gomes, Antônio Tadeu Azevedo and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@thesis{muniz_notificacao_2000,
	location = {Rio de Janeiro, Brasil},
	title = {Notificação e controle de versões para o suporte à autoria cooperativa no sistema {HyperProp}},
	type = {phdthesis},
	author = {Muniz, Bruno Cavalcanti},
	year = {2000},
}

@article{soares_modeling_2000,
	title = {Modeling, authoring and formatting hypermedia documents in the {HyperProp} system},
	journaltitle = {{ACM} Multimedia Systems Journal},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira and Saade, Débora Christina Muchaluat},
	year = {2000},
}

@inproceedings{antonacci_ncl_2000,
	location = {Natal, Brasil},
	title = {{NCL}: Uma linguagem declarativa para especificação de documentos hipermídia na web},
	series = {{VI} simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}2000},
	author = {Antonacci, Meire Juliana and Saade, Débora Christina Muchaluat and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@inproceedings{martinez_lds_2000,
	location = {Ilkley, Inglaterra},
	title = {{LDS}: A load dependent scheduling algorithm},
	series = {{IFIP} {ATM} \& {IP} 2000 workshop, in participants proceedings: Research work in progess},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@thesis{antonacci_ncl_2000-1,
	location = {Rio de Janeiro, Brasil},
	title = {{NCL}: Uma linguagem declarativa para especificação de documentos hipermídia com sincronização temporal e espacial},
	type = {phdthesis},
	author = {Antonacci, Meire Juliana},
	year = {2000},
}

@thesis{rodrigues_integracao_2000,
	location = {Rio de Janeiro, Brasil},
	title = {Integração de documentos {SMIL} ao sistema {HyperProp} e desenvolvimento de ferramentas para exibição de objetos com relacionamentos de sincronização},
	type = {phdthesis},
	author = {Rodrigues, Leandro Marques},
	year = {2000},
}

@inproceedings{antonacci_improving_2000,
	location = {Nagano, Japão},
	title = {Improving the expressiveness of {XML}-Based hypermedia authoring languages},
	series = {{VII} multimedia modeling conference - {MMM}2000},
	author = {Antonacci, Meire Juliana and Saade, Débora Christina Muchaluat and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@inproceedings{colcher_um_2000-1,
	location = {Belo Horizonte, Brasil},
	title = {Um meta modelo para engenharia de serviços de telecomunicações},
	series = {{XVIII} simpósio brasileiro de redes de computadores - {SBRC}2000},
	author = {Colcher, Sérgio and Gomes, Antônio Tadeu Azevedo and Soares, Luiz Fernando Gomes},
	year = {2000},
}

@thesis{colcher_um_1999,
	location = {Rio de Janeiro, Brasil},
	title = {Um meta modelo para aplicações e serviços de comunicação adaptáveis e com qualidade de serviço},
	type = {phdthesis},
	author = {Colcher, Sérgio},
	year = {1999},
}

@inproceedings{de_moura_smmm_1999,
	location = {Salvador, Brasil},
	title = {{SMMM} - um sistema de correio eletrônico multimídia seguro},
	series = {{XVII} simpósio brasileiro de redes de computadores - {SBRC}99},
	author = {de Moura, Marcel Stanley Albuquerque and de Souza, Guido Lemos and Batista, Thaís Vasconcelos and Soares, Luiz Fernando Gomes},
	year = {1999},
}

@inproceedings{rodrigues_acrescendo_1999,
	location = {Goiânia, Brasil},
	title = {Acrescendo facilidades {NCM} a documentos {SMIL}},
	series = {V simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}99},
	author = {Rodrigues, Leandro Marques and Rodrigues, Rogério Ferreira and Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes},
	year = {1999},
}

@thesis{balthar_acesso_1999,
	location = {,},
	title = {Acesso às redes {ATM} baseado em quadros: Um estudo do serviço de dados da {PETROBRAS}},
	type = {phdthesis},
	author = {Balthar, Fernando},
	year = {1999},
}

@inproceedings{gomes_um_1999,
	title = {Um framework para provisão de {QoS} em ambientes genéricos de processamento e comunicação},
	booktitle = {Anais do {XVII} Simpósio Brasileiro de Redes de Computadores ({SBRC}’99). Salvador},
	author = {Gomes, Antônio Tadeu A. and Colcher, {SÉRGIO} and Soares, {LUIZ} {FERNANDO} G.},
	year = {1999},
}

@thesis{gomes_um_1999-1,
	location = {Rio de Janeiro,},
	title = {Um framework para provisão de {QoS} em ambientes genéricos de processamento e comunicação (thesis)},
	type = {phdthesis},
	author = {Gomes, Antônio Tadeu Azevedo},
	year = {1999},
}

@inproceedings{rodrigues_um_1999,
	title = {Um framework para a provisão de serviço de multicast em ambientes genéricos de comunicação de dados},
	pages = {206--221},
	booktitle = {{XVII} Simpósio Brasileiro de Redes de Computadores ({SBRC}’99)},
	author = {Rodrigues, {MARCUS} {ANTONIO} A. and Colcher, {SÉRGIO} and Soares, {LUIZ} {FERNANDO} G.},
	year = {1999},
}

@thesis{rodrigues_um_1999-1,
	location = {Rio de Janeiro, Brasil},
	title = {Um framework para a provisão de serviço de multicast em ambientes genéricos de comunicação de dados (thesis)},
	type = {phdthesis},
	author = {Rodrigues, Marcus Antonio Almeida},
	year = {1999},
}

@thesis{bastos_comunicacao_1999,
	location = {Rio de Janeiro, Brasil},
	title = {Comunicação de voz sobre {ATM}: Utilização na rede corporativa {ATM} da {PETROBRAS}},
	type = {phdthesis},
	author = {Bastos, André},
	year = {1999},
}

@inproceedings{martinez_mecanismos_1999,
	location = {Assunção, Paraguai},
	title = {Mecanismos de transmisión multipunto confiable: una conceptualización},
	series = {{VII} congresso iberoamericano de educación superior en computación - {CLEI}99},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo},
	year = {1999},
}

@inproceedings{rodrigues_improving_1999,
	location = {Ottawa, Canadá},
	title = {Improving {SMIL} documents with {NCM} facilities},
	series = {{VI} multimedia modeling conference - {MMM}99},
	author = {Rodrigues, Leandro Marques and Rodrigues, Rogério Ferreira and Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes},
	year = {1999},
}

@article{soares_versioning_1999,
	title = {Versioning support in the {HyperProp} system},
	journaltitle = {Journal of Multimedia Tools and Applications},
	author = {Soares, Luiz Fernando Gomes and de Souza, Guido Lemos and Rodrigues, Rogério Ferreira and Saade, Débora Christina Muchaluat},
	year = {1999},
}

@inproceedings{santos_um_1998,
	location = {Rio de Janeiro, Brasil},
	title = {Um modelo formal para a verificação da consistência de documentos hipermídia {NCM}},
	series = {{IV} simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}98},
	author = {Santos, Celso and Courtiat, Jean-Pierre and de Souza, Guido Lemos and Soares, Luiz Fernando Gomes},
	year = {1998},
}

@inproceedings{santos_formal_1998,
	location = {Lausanne, Switzerland},
	title = {Formal specification and verification of hypermedia documents based on the nested context model},
	series = {V multimedia modeling conference - {MMM}98},
	author = {Santos, Celso and Courtiat, Jean-Pierre and Soares, Luiz Fernando Gomes and de Souza, Guido Lemos},
	year = {1998},
}

@inproceedings{santos_design_1998,
	location = {Bristol, Reino Unido},
	title = {Design methodology and formal validation of hypermedia documents},
	series = {{ACM} multimedia 98},
	author = {Santos, Celso and Soares, Luiz Fernando Gomes and de Souza, Guido Lemos and Courtiat, Jean-Pierre},
	year = {1998},
}

@article{rodrigues_composite_1998,
	title = {Composite Nodes, Contextual Links and Graphical Structural Views on the {WWW}},
	volume = {5},
	issn = {0104-6500},
	url = {ftp://ftp.inf.puc-rio.br/pub/docs/techreports/95_23_muchaluat.ps.gz},
	doi = {10.1590/S0104-65001998000300004},
	pages = {00--00},
	number = {2},
	journaltitle = {Journal of the Brazilian Computer Society},
	author = {Rodrigues, Rogério Ferreira and Muchaluat-Saade, Débora C. and Soares, Luiz Fernando Gomes},
	urlyear = {2016},
	year = {1998},
}

@inproceedings{soares_authoring_1998,
	location = {Austin, {EUA}},
	title = {Authoring and formatting of hypermedia documents},
	series = {{IEEE} conference on mutimedia computing systems - {ICMCS}98},
	author = {Soares, Luiz Fernando Gomes and Saade, Débora Christina Muchaluat and Rodrigues, Rogério Ferreira},
	year = {1998},
}

@inproceedings{martinez_transient_1998,
	location = {Ilkley, Inglaterra},
	title = {Transient analysis of the behaviour of an {ATM} multiplexer during congestion periods},
	series = {{IFIP} {ATM} 98, in participants proceedings: Research papers},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo and Soares, Luiz Fernando Gomes},
	year = {1998},
}

@inproceedings{soares_propagacao_1998,
	location = {Maringá, Brasil},
	title = {Propagação e proliferação de versões em modelos conceituais hipermídia com composições},
	series = {Simpósio brasileiro de bancos de dados - {SBBD}98},
	author = {Soares, Luiz Fernando Gomes and de Souza, Guido Lemos and Rodrigues, Rogério Ferreira and Saade, Débora Christina Muchaluat},
	year = {1998},
}

@inproceedings{colcher_modelo_1998,
	location = {Rio de Janeiro, Brasil},
	title = {Modelo de referência unificado para arquitetura de protocolos e programação de aplicações multimídia},
	series = {{XVI} simpósio brasileiro de redes de computadores - {SBRC}98},
	author = {Colcher, Sérgio and Soares, Luiz Fernando Gomes},
	year = {1998},
}

@inproceedings{saade_navegacao_1998,
	location = {Belo Horizonte, Brasil},
	title = {Navegação e consulta no {WWW} através de browser gráfico usando visões olho-de-peixe},
	series = {{XXV} seminário integrado de software e hardware - semish98},
	author = {Saade, Débora Christina Muchaluat and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {1998},
}

@inproceedings{rodrigues_integracao_1998,
	location = {Rio de Janeiro, Brasil},
	title = {Integração dos sistemas {HyperProp} e {WWW}},
	series = {{IV} simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}98},
	author = {Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {1998},
}

@inproceedings{saade_www_1998,
	location = {Lausanne, Switzerland},
	title = {{WWW} fisheye-view graphical browser},
	series = {V multimedia modeling conference - {MMM}98},
	author = {Saade, Débora Christina Muchaluat and Rodrigues, Rogério Ferreira and Soares, Luiz Fernando Gomes},
	year = {1998},
}

@inproceedings{soares_versoes_1998,
	location = {Rio de Janeiro, Brasil},
	title = {Versões de representação em modelos com composições aninhadas},
	series = {{IV} simpósio brasileiro de sistemas multimídia e hipermídia - {SBMídia}98},
	author = {Soares, Luiz Fernando Gomes and de Souza, Guido Lemos and Rodrigues, Rogério Ferreira and Saade, Débora Christina Muchaluat},
	year = {1998},
}

@thesis{da_cunha_roteamento_1997,
	location = {Rio de Janeiro, Brasil},
	title = {Roteamento multiponto em redes {ATM} homogêneas},
	type = {phdthesis},
	author = {da Cunha, Roberto Harkovsky},
	year = {1997},
}

@inproceedings{saade_graphical_1997,
	title = {Graphical structured-editing of multimedia documents with temporal and spatial constraints},
	series = {{IV} multimedia modeling conference - {MMM}97},
	author = {Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes and Costa, Fábio Rodrigues and de Souza, Guido Lemos},
	year = {1997},
}

@thesis{rodrigues_formatacao_1997,
	location = {Rio de Janeiro, Brasil},
	title = {Formatação temporal e espacial no sistema {HyperProp}},
	type = {phdthesis},
	author = {Rodrigues, Rogério Ferreira},
	year = {1997},
}

@inproceedings{soares_autoria_1997,
	location = {São Carlos, Brasil},
	title = {Autoria e formatação estruturada de documentos hipermídia com restrições temporais},
	series = {{III} workshop em sistemas multimídia e hipermídia},
	author = {Soares, Luiz Fernando Gomes and Rodrigues, Rogério Ferreira},
	year = {1997},
}

@inproceedings{rodrigues_authoring_1997,
	location = {Santiago, Chile},
	title = {Authoring and formatting of documents based on event-driven hypermedia models},
	series = {{IEEE} conference on protocols for multimedia systems and multimedia networking},
	author = {Rodrigues, Rogério Ferreira and de Souza, Guido Lemos and Soares, Luiz Fernando Gomes},
	year = {1997},
}

@thesis{de_souza_sincronismo_1997,
	location = {Rio de Janeiro, Brasil},
	title = {Sincronismo na modelagem e execução de apresentações de documentos multimidia},
	type = {phdthesis},
	author = {de Souza, Guido Lemos},
	year = {1997},
}

@thesis{de_amorim_o_1997,
	location = {Rio de Janeiro, Brasil},
	title = {O roteamento no dimensionamento de redes de alta velocidade},
	type = {phdthesis},
	author = {de Amorim, Mauro Tavares},
	year = {1997},
}

@inproceedings{soares_ancoras_1996,
	location = {Recife, Brasil},
	title = {Âncoras e elos em nós de composição},
	series = {{XXIII} seminário integrado de software e hardware - semish96},
	author = {Soares, Luiz Fernando Gomes and Casanova, Marco Antônio and de Souza, Guido Lemos},
	year = {1996},
}

@inproceedings{soares_anchors_1996,
	location = {Toulouse, França},
	title = {Anchors and links for nested composite nodes},
	series = {{III} multimedia modeling conference - {MMM}96},
	author = {Soares, Luiz Fernando Gomes and de Souza, Guido Lemos},
	year = {1996},
}

@inproceedings{martinez_algoritmo_1996,
	location = {Valdivia, Chile},
	title = {Algoritmo dependiente de la carga para administración de ancho de banda en redes {ATM}},
	series = {{VIII} seminario de telecomunicaciones},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo and Soares, Luiz Fernando Gomes},
	year = {1996},
}

@thesis{costa_um_1996,
	location = {Rio de Janeiro, Brasil},
	title = {Um editor gráfico para definição e exibição do sincronismo de documentos Multimídia/Hipermídia},
	type = {phdthesis},
	author = {Costa, Fábio Rodrigues},
	year = {1996},
}

@thesis{de_oliveira_tvs_1996,
	location = {Rio de Janeiro, Brasil},
	title = {{TVS}: Um sistema de videoconferência},
	type = {phdthesis},
	author = {de Oliveira, Jauvane Cavalcanti},
	year = {1996},
}

@inproceedings{de_oliveira_tvs_1996-1,
	location = {Fortaleza, Brasil},
	title = {{TVS}: Um sistema de video conferência com documentos compartilhados},
	series = {{II} workshop em sistemas hipermídia distribuídos},
	author = {de Oliveira, Jauvane Cavalcanti and Soares, Luiz Fernando Gomes},
	year = {1996},
}

@inproceedings{costa_exibicao_1996,
	location = {Fortaleza, Brasil},
	title = {Exibição e edição gráfica do sincronismo espacial e temporal de objetos hipermídia em modelos com composições aninhadas},
	series = {{II} workshop em sistemas hipermídia distribuídos},
	author = {Costa, Fábio Rodrigues and de Souza, Guido Lemos and Soares, Luiz Fernando Gomes},
	year = {1996},
}

@inproceedings{saade_editores_1996,
	location = {São Carlos, Brasil},
	title = {Editores gráficos para estruturas com composições},
	series = {X simpósio brasileiro de engenharia de software - {SBES}96},
	author = {Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes and Casanova, Marco Antônio},
	year = {1996},
}

@inproceedings{costa_editor_1996,
	location = {Caxambu, Brasil},
	title = {Editor gráfico para estrutura e sincronismo de documentos multimídia},
	series = {{IX} simpósio brasileiro de computação gráfica e processamento de imagens},
	author = {Costa, Fábio Rodrigues and Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes and de Souza, Guido Lemos},
	year = {1996},
}

@inproceedings{de_souza_edicao_1996,
	location = {Fortaleza, Brasil},
	title = {Edição e execução de apresentações de documentos hipermídia no {HyperProp}},
	series = {{II} workshop em sistemas hipermídia distribuídos},
	author = {de Souza, Guido Lemos and Soares, Luiz Fernando Gomes},
	year = {1996},
}

@thesis{saade_browsers_1996,
	location = {Rio de Janeiro, Brasil},
	title = {Browsers e trilhas para documentos hipermídia baseados em modelos com composições aninhadas},
	type = {phdthesis},
	author = {Saade, Débora Christina Muchaluat},
	year = {1996},
}

@article{martinez_performance_1996,
	title = {Performance analysis of a voice multiplexer with bit dropping},
	journaltitle = {Revista Latino-Íbero-Americana de Investigación Operativa},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo and Soares, Luiz Fernando Gomes},
	year = {1996},
}

@article{souza_filho_modelo_1996,
	title = {Modelo de objetos baseado no {CORBA} para sistemas hipermídia abertos com garantias de sincronização},
	abstract = {This paper outlines some extensions to the object model underlying the {CORBA} specification to addrress the requirements of multimedia and hypermedia systems. These extensions include the adaptationof many concepts brought from other standards, such as {ODP}, {ANSA} and {PREMO},like the concept of active objects. Based on the synchronization aspectsof hypermedia models, the proposed extensions include support forspecification of objects with continuous media attributes, like audio andvideo. and the " Media Pipes ", which allows for the selection of suitable abstractions to deal with the access and transfer of continuous media information.},
	author = {Souza Filho, G.L. and Soares, L.F.G. and Casanova, M.A.},
	year = {1996},
}

This paper outlines some extensions to the object model underlying the CORBA specification to addrress the requirements of multimedia and hypermedia systems. These extensions include the adaptationof many concepts brought from other standards, such as ODP, ANSA and PREMO,like the concept of active objects. Based on the synchronization aspectsof hypermedia models, the proposed extensions include support forspecification of objects with continuous media attributes, like audio andvideo. and the " Media Pipes ", which allows for the selection of suitable abstractions to deal with the access and transfer of continuous media information.

@inproceedings{batista_mmm_1996,
	location = {Antuérpia, Bélgica},
	title = {{MMM}: Hypermedia mail over {WWW}},
	series = {{III} international workshop on community networking},
	author = {Batista, Thaís Vasconcelos and de La Rocque Rodriguez, Noemi and Soares, Luiz Fernando Gomes and Resende, M.C.},
	year = {1996},
}

@incollection{casanova_nested_1996,
	location = {São Paulo, Brasil},
	edition = {1},
	title = {Nested composite nodes and version control in na open hypermedia system revisited},
	author = {Casanova, Marco Antônio and Soares, Luiz Fernando Gomes},
	year = {1996},
}

@inproceedings{soares_nested_1996,
	location = {São Paulo, Brasil},
	title = {Nested composite nodes and version control in an open hypermedia system revisited},
	series = {I prêmio compaq de estímulo a pesquisa e desenvolvimento em informática},
	author = {Soares, Luiz Fernando Gomes and de La Rocque Rodriguez, Noemi and Casanova, Marco Antônio},
	year = {1996},
}

@inproceedings{batista_mmm_1996-1,
	location = {Fortaleza, Brasil},
	title = {{MMM}: Um correio eletrônico multimídia sobre o {WWW}},
	series = {{XIV} simpósio brasileiro de redes de computadores - {SBRC}96},
	author = {Batista, Thaís Vasconcelos and de La Rocque Rodriguez, Noemi and Soares, Luiz Fernando Gomes and Resende, M.C.},
	year = {1996},
}

@report{souza_filho_anchors_1995,
	location = {Rio de Janeiro, Brasil},
	title = {Anchors and links for composite nodes},
	abstract = {This technical report focus on the definition of anchors and links for nested composite nodes, that is, composite nodes containing other composite nodes. It considers questions such as link inheritance and node reference, which become fairly complex in the presence of nested composite nodes. Then, the paper extends the discussion to include virtual anchors and links, defined by expressions in an appropriate language. Finally, it addresses some issues related to anchors and links in the presence of object versioning, such as how to maintain automatic reference to the last version of a node.},
	author = {Souza Filho, G.L. and Soares, L.F.G. and Casanova, M.A.},
	year = {1995},
}

This technical report focus on the definition of anchors and links for nested composite nodes, that is, composite nodes containing other composite nodes. It considers questions such as link inheritance and node reference, which become fairly complex in the presence of nested composite nodes. Then, the paper extends the discussion to include virtual anchors and links, defined by expressions in an appropriate language. Finally, it addresses some issues related to anchors and links in the presence of object versioning, such as how to maintain automatic reference to the last version of a node.

@thesis{ridolfi_proposta_1995,
	location = {Rio de Janeiro, Brasil},
	title = {Proposta de uma arquitetura transacional distribuída},
	type = {phdthesis},
	author = {Ridolfi, Lorenzo Francisco},
	year = {1995},
}

@book{soares_redes_1995,
	location = {Rio de Janeiro, Brasil},
	edition = {2},
	title = {Redes de computadores: Das {LANs}, {MANs} e {WANs} às redes {ATM}},
	author = {Soares, Luiz Fernando Gomes and de Souza, Guido Lemos and Colcher, Sérgio},
	year = {1995},
}

@inproceedings{martinez_alise_1995,
	location = {Belo Horizonte, Brasil},
	title = {Análise de desempenho de um multiplexador de células com descarte de bits},
	series = {{XIII} simpósio brasileiro de redes de computadores - {SBRC}95},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo and Soares, Luiz Fernando Gomes},
	year = {1995},
}

@article{muchaluat_browsing_1995,
	title = {Browsing in a Hypermedia System with Nested Composite Nodes},
	issn = {0103-9741},
	abstract = {: Navigating through complex hypermedia documents is not an easy task for users as the number of nodes and the density of links become very large. In order to improve user orientation, it is necessary to provide information about the overall structure of the hyperdocument, showing connections among nodes and mainly details about the navigation possibilities. The implementation of these navigation tools is still a challenge to hypermedia system designers. The main goal of this report is to present some techniques to build graphical browsers for hypermedia systems that allow compositions of nodes. First, we present the basic concepts of hypermedia models with nested composite nodes, showing the importance of navigation tools in order to guide the user within the hyperspace. Then, we present our proposal of a navigation browser that extends the fisheye-view strategy to nested compositions. We also outline an implementation of the browser illustrating the ideas proposed. Lastly, we discuss...},
	journaltitle = {Monografias em Ciência da Computação {MCC}23 - {DI} / {PUC}-Rio},
	author = {Muchaluat, Débora Christina and Soares, Luiz Fernando Gomes and Fernando, Luiz and Soares, Gomes and Casanova, Marco Antonio},
	year = {1995},
}

: Navigating through complex hypermedia documents is not an easy task for users as the number of nodes and the density of links become very large. In order to improve user orientation, it is necessary to provide information about the overall structure of the hyperdocument, showing connections among nodes and mainly details about the navigation possibilities. The implementation of these navigation tools is still a challenge to hypermedia system designers. The main goal of this report is to present some techniques to build graphical browsers for hypermedia systems that allow compositions of nodes. First, we present the basic concepts of hypermedia models with nested composite nodes, showing the importance of navigation tools in order to guide the user within the hyperspace. Then, we present our proposal of a navigation browser that extends the fisheye-view strategy to nested compositions. We also outline an implementation of the browser illustrating the ideas proposed. Lastly, we discuss...

@inproceedings{batista_correios_1995,
	location = {São Carlos, Brasil},
	title = {Correios eletrônicos multimídia},
	series = {I workshop em sistemas hipermídia distribuídos},
	author = {Batista, Thaís Vasconcelos and de La Rocque Rodriguez, Noemi and Soares, R.M. and Soares, Luiz Fernando Gomes},
	year = {1995},
}

@thesis{de_assis_mesquita_soares_correio_1995,
	location = {Rio de Janeiro, Brasil},
	title = {Correio eletronico Multimídia/Hipermídia},
	type = {phdthesis},
	author = {de Assis Mesquita Soares, Ricardo},
	year = {1995},
}

@inproceedings{saade_browsers_1995,
	location = {São Carlos, Brasil},
	title = {Browsers e trilhas no sistema {HyperProp}},
	series = {I workshop em sistemas hipermídia distribuídos},
	author = {Saade, Débora Christina Muchaluat and Soares, Luiz Fernando Gomes},
	year = {1995},
}

@inproceedings{colcher_arquitetura_1995,
	location = {São Carlos, Brasil},
	title = {Arquitetura do sistema {HyperProp}},
	series = {I workshop em sistemas hipermídia distribuídos},
	author = {Colcher, Sérgio and Soares, Luiz Fernando Gomes and Casanova, Marco Antônio},
	year = {1995},
}

@report{souza_filho_synchronization_1995,
	location = {Rio de Janeiro, Brasil},
	title = {Synchronization aspects of a presentation model for hypermedia documents with composite nodes},
	abstract = {This paper outlines the synchronization aspects of a hypermedia presentation model, called Nested Context Presentation Model ({NCPM}), which has three major features. First, it allows authors to specify temporal synchronization constraints among events of interest within hypermedia documents. Second, it allows asynchronous material, such as user interaction links, or programs, to be combined with synchronous material in a single hypermedia document. Third, it separates the presentation specification from the structural definition of the hypermedia document. The synchronization facilities of {NCPM} can be applied to any hypermedia model with composite nodes and, with minor simplifications, even to those conceptual models without composites. In particular, the synchronization facilities can be applied to those models that can be translated to {MHEG} objects.},
	author = {Souza Filho, G.L. and Soares, L.F.G. and Casanova, M.A.},
	year = {1995},
}

This paper outlines the synchronization aspects of a hypermedia presentation model, called Nested Context Presentation Model (NCPM), which has three major features. First, it allows authors to specify temporal synchronization constraints among events of interest within hypermedia documents. Second, it allows asynchronous material, such as user interaction links, or programs, to be combined with synchronous material in a single hypermedia document. Third, it separates the presentation specification from the structural definition of the hypermedia document. The synchronization facilities of NCPM can be applied to any hypermedia model with composite nodes and, with minor simplifications, even to those conceptual models without composites. In particular, the synchronization facilities can be applied to those models that can be translated to MHEG objects.

@inproceedings{de_souza_synchronization_1995,
	location = {São Francisco, {EUA}},
	title = {Synchronization aspects of a hypermedia presentation model with composite nodes},
	series = {{ACM} workshop on effective abstractions in multimedia, in connection with {ACM} multimedia 95},
	author = {de Souza, Guido Lemos and Soares, Luiz Fernando Gomes and Casanova, Marco Antônio},
	year = {1995},
}

@inproceedings{martinez_performance_1995,
	location = {Arica, Chile},
	title = {Performance analysis of an {ATM} voice multiplexer in congestion},
	series = {{XV} international conference of the chilean computer science society},
	author = {Martínez, Marta Emília Barría and Vallejos, Reinaldo and Soares, Luiz Fernando Gomes},
	year = {1995},
}

@inproceedings{de_souza_o_1995,
	location = {São Carlos, Brasil},
	title = {O modelo de apresentação do sistema {HyperProp}},
	series = {I workshop em sistemas hipermídia distribuídos},
	author = {de Souza, Guido Lemos and Soares, Luiz Fernando Gomes},
	year = {1995},
}

@inproceedings{soares_hyperprop_1995,
	location = {São Carlos, Brasil},
	title = {{HyperProp}: uma visão geral},
	series = {I workshop em sistemas hipermídia distribuídos},
	shorttitle = {{HyperProp}},
	author = {Soares, Luis Fernando Gomes and Casanova, M. A. and Nunes, Maria das Graças Volpe and Souza, G. L. and Vallejos, R. and Amorim, F. and Barria, M. and Batista, T. V. and Fortes, Renata Pontin de Mattos and Hasegawa, R.},
	year = {1995},
}

@article{soares_nested_1995,
	title = {Nested composite nodes and version control in an open hypermedia system},
	journaltitle = {Information Systems Journal},
	author = {Soares, Luiz Fernando Gomes and Casanova, Marco Antônio and de La Rocque Rodriguez, Noemi},
	year = {1995},
}

@inproceedings{de_la_rocque_rodriguez_ncm_1995,
	location = {São Carlo, Brasil},
	title = {{NCM}: A conceptual model for hyperdocuments},
	series = {I workshop em sistemas hipermídia distribuídos},
	author = {de La Rocque Rodriguez, Noemi and Casanova, Marco Antônio and Soares, Luiz Fernando Gomes},
	year = {1995},
}

@article{soares_lans_1995,
	title = {Das {LANs}, {MANs} e {WANs} às Redes {ATM}},
	journaltitle = {Editora Campus. Rio de Janeiro},
	author = {Soares, Luiz Fernando Gomes and Lemos, Guido and Colcher, Sérgio},
	year = {1995},
}

@thesis{batista_controle_1994,
	location = {Rio de Janeiro, Brasil},
	title = {Controle de versões no modelo hipermídia de contextos aninhados},
	type = {phdthesis},
	author = {Batista, Thaís Vasconcelos},
	year = {1994},
}

@article{soares_modelo_1994,
	title = {Modelo de contextos aninhados - um modelo conceitual hipermídia},
	journaltitle = {Revista Brasileira de Computação},
	author = {Soares, Luiz Fernando Gomes and Casanova, Marco Antônio and de La Rocque Rodriguez, Noemi},
	year = {1994},
}

@article{soares_architecture_1993,
	title = {An architecture for hypermedia systems using {MHEG} standard objects interchange},
	volume = {13},
	pages = {131--139},
	number = {2},
	journaltitle = {Information Services \& Use},
	author = {Soares, Luiz Fernando G. and Casanova, Marco Antonio and Colcher, Sérgio},
	year = {1993},
}

@report{soares_open_1993,
	location = {Rio de Janeiro, Brasil},
	title = {An open hypermedia system with nested composte nodes and version control},
	abstract = {This paper describes a model for hypermedia documents which includes facilities for structured organization of nodes and for version control. This model is currently being used as a basis in the implementation of a development tool for local and distributed hypermedia applications. The layered architecture of this tool grants the user access to distinct levels of abstaction; it also allows the system to maintain compatibility with the {MHEG} proposal for hypermedia object interchange.},
	author = {Soares, L.F.G. and Casanova, M.A. and Rodriguez, N.L.R.},
	year = {1993},
}

This paper describes a model for hypermedia documents which includes facilities for structured organization of nodes and for version control. This model is currently being used as a basis in the implementation of a development tool for local and distributed hypermedia applications. The layered architecture of this tool grants the user access to distinct levels of abstaction; it also allows the system to maintain compatibility with the MHEG proposal for hypermedia object interchange.

@article{soares_open_1993-1,
	title = {An Open Hypermedia System with nested composite nodes and version control},
	issn = {0103-9741},
	url = {ftp://obaluae.inf.puc-rio.br/pub/docs/techreports/93_16_soares.pdf},
	journaltitle = {Monografias em Ciência da Computação},
	author = {Soares, Luiz Fernando Gomes},
	year = {1993},
}

@thesis{juca_treinamento_1993,
	location = {Rio de Janeiro, Brasil},
	title = {Treinamento da fala - uma aplicação multimídia usando o modelo de contextos aninhados},
	type = {phdthesis},
	author = {Jucá, Paulo},
	year = {1993},
}

@thesis{colcher_uma_1993,
	location = {Rio de Janeiro, Brasil},
	title = {Uma arquitetura aberta para sistemas hipermídia},
	type = {phdthesis},
	author = {Colcher, Sérgio},
	year = {1993},
}

@book{soares_fundamentos_1992,
	location = {Gramado, Brasil},
	edition = {1},
	title = {Fundamentos de sistema multimídia},
	author = {Soares, Luiz Fernando Gomes and Casanova, Marco Antônio and Tucherman, Luis and Nunes, P.R.R.},
	year = {1992},
}

@thesis{de_faria_implementacao_1992,
	location = {Rio de Janeiro, Brasil},
	title = {Implementação do mecanismo de controle de acesso por detecção de silêncio em um sistema de teleconferência},
	type = {phdthesis},
	author = {de Faria, Ana Lúcia Araújo},
	year = {1992},
}

@thesis{filippo_proposta_1991,
	location = {Rio de Janeiro, Brasil},
	title = {Proposta de um sistema de tratamento de mensagens multimídia para um ambiente de rede local},
	type = {phdthesis},
	author = {Filippo, Denise Del Re},
	year = {1991},
}

@thesis{furtado_servidor_1991,
	location = {Rio de Janeiro, Brasil},
	title = {Servidor de arquivos de voz: Estudo preliminar do tratamento em tempo real},
	type = {phdthesis},
	author = {Furtado, Alberto Antônio Bittencourt},
	year = {1991},
}

@book{soares_modelagem_1991,
	location = {Rio de Janeiro, Brasil},
	edition = {1},
	title = {Modelagem de simulação discreta de sistema},
	author = {Soares, Luiz Fernando Gomes},
	year = {1991},
}

@thesis{de_souza_um_1991,
	location = {Rio de Janeiro, Brasil},
	title = {Um editor de voz para sistemas hipermídia},
	type = {phdthesis},
	author = {de Souza, Guido Lemos},
	year = {1991},
}

@thesis{de_azevedo_fernandes_um_1990,
	location = {Rio de Janeiro, Brasil},
	title = {Um editor de documentos para um sistema cooperativo com serviços integrados de voz e dados},
	type = {phdthesis},
	author = {de Azevedo Fernandes, Iara Regina},
	year = {1990},
}

@thesis{autran_especificacao_1990,
	location = {Rio de Janeiro, Brasil},
	title = {Especificação funcional de um editor de voz para um sistema com serviços integrados em um ambiente de rede local},
	type = {phdthesis},
	author = {Autran, Eduardo},
	year = {1990},
}

@thesis{ribeiro_lanbreta-dms_1989,
	location = {Rio de Janeiro, Brasil},
	title = {{LANBRETA}-{DMS} - um sistema integrado de voz e dados para troca de mensagens em um ambiente de redes locais de computadores},
	institution = {{PUC}-Rio},
	type = {phdthesis},
	author = {Ribeiro, Nelson Ramos},
	year = {1989},
}

@thesis{bastos_lanbreta-gcs_1989,
	location = {Rio de Janeiro, Brasil},
	title = {{LANBRETA}-{GCS} - um sistema de conferência audio-gráfica para um ambiente de rede local},
	institution = {{PUC}-Rio},
	type = {phdthesis},
	author = {Bastos, Taís Leite Pimenta},
	year = {1989},
}

@thesis{cordeiro_lanbreta-dts_1989,
	location = {Rio de Janeiro, Brasil},
	title = {{LANBRETA}-{DTS} - um sistema de telefonia para um ambiente de rede local},
	institution = {{PUC}-Rio},
	type = {phdthesis},
	author = {Cordeiro, Roberto César Serra},
	year = {1989},
}

@thesis{bosignole_alise_1988,
	location = {Rio de Janeiro, Brasil},
	title = {Análise do acesso aleatório em sistemas de comunicação de dados via satélite},
	type = {phdthesis},
	author = {Bosignole, Ricardo},
	year = {1988},
}

@thesis{de_lima_martins_especificacao_1988,
	location = {Rio de Janeiro, Brasil},
	title = {Especificação de serviços de voz e dados integrados em uma rede local de computadores},
	type = {phdthesis},
	author = {de Lima Martins, Simone},
	year = {1988},
}

@book{soares_redes_1986,
	location = {Rio de Janeiro, Brasil},
	edition = {1},
	title = {Redes locais},
	publisher = {Campus},
	author = {Soares, Luiz Fernando Gomes},
	year = {1986},
}