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XX Brazilian Symposium on Multimedia and the Web - Webmedia 2014 schedule

Wednesday 19th November 2014

  • ST4 - Sistema de Aferição de Qualidade em Serviços de Telefonia IP

    by Murilo Vetter and Roberto Willrich

    IP telephony is a consolidated service that has been growing steadily, driven by its various advantages. However, maintaining the quality of this service is still a challenge. As the telephony is an essential service for various organizations, the Quality of Service (QoS) offered by the network and the quality of the service by itself must be preserved. Therefore, the quality offered by the IP telephony service must be constantly monitored to guide maintenance actions. This paper proposes a quality monitoring system for IP telephony services based on the newly defined reporting package RTCP-XR and using the SIP signaling protocol. A use case of the proposed system on an IP telephony production service of a university shows its effectiveness and versatility.

    At 4:30pm to 5:00pm, Wednesday 19th November

  • WTIC - TouchSlide: Um Aplicativo para Controle Compartilhado de Exibição de Mídia em Dispositivos Móveis

    Recent research in mobile media sharing show the possibility to delivery multimedia content on mobile networks. This paper describe the TouchSlide, an Android based application for media content sharing with educational purpose. The authors present an application for improve student-professor interaction in a class environment. Students and professor can interact using mobile devices, sharing class presentation. Based in a client-server architecture, the professor controls media exhibition into student’s mobile devices.

    At 4:30pm to 5:00pm, Wednesday 19th November

  • WTIC - TouchSlide: Um Aplicativo para Controle Compartilhado de Exibição de Mídia em Dispositivos Móveis

    by Gerlan Stanley de Lima Gonçalves, Daniel Faustino Souza and Angélica Castro

    Recent research in mobile media sharing show the possibility to delivery multimedia content on mobile networks. This paper describe the TouchSlide, an Android based application for media content sharing with educational purpose. The authors present an application for improve student-professor interaction in a class environment. Students and professor can interact using mobile devices, sharing class presentation. Based in a client-server architecture, the professor controls media exhibition into student’s mobile devices.

    At 4:30pm to 5:00pm, Wednesday 19th November

  • WTVDI - La TVdi: concepto y factor de impulso de los Sistemas de Alertas Tempranas. Un caso práctico: Proyecto Remediando

    by Douglas Paredes

    At 4:30pm to 4:45pm, Wednesday 19th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • WTVDI - Licencias de televisión digital. Tensiones entre viejos y nuevos actores

    by Nestor Daniel González

    At 4:45pm to 5:00pm, Wednesday 19th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • ST2 - Uma Contribuição ao Gerenciamento de Redes de Sensores Direcionado à Consciência de Contexto na Ubicomp

    by Rodrigo Santos De Souza, João Ladislau Barbará Lopes, Ana Marilza Pernas Fleischmann, Gizele Ingrid Gadotti, Adenauer Correa Yamin and Claudio Fernando Resin Geyer

    One of the central aspects of Ubiquitous Computing (UbiComp) is associated with tight integration between computer systems and the environment. In this sense, one of the main research challenges in the area is to provide mechanisms for context awareness that promote the development of applications that respond itself according to the dynamics of the physical environment of user's interest. This paper presents the EXEHDA-SN, a software architecture managed by rules that provides the interaction of UbiComp systems with the physical environment by sensors networks and actuators. This work is being developed as part of research efforts related to EXEHDA Middleware. To assess the functionality of the EXEHDA-SN, we present a case study in agricultural area, highlighting the prototypes and tests performed.

    At 5:00pm to 5:30pm, Wednesday 19th November

  • ST4 - Cacuriá: Ferramenta de Autoria Multimídia para Objetos de Aprendizagem

    by André Damasceno, Rosendy Jess Galabo and Carlos Soares Neto

    O uso de recursos multimídia durante as aulas é cada vez mais comum, tornando o processo de aprendizagem mais participativo e interativo. Objetos de aprendizagem (OAs) são entidades, digitais ou não, que podem ser utilizadas, reutilizadas ou referenciadas durante o ensino. A autoria multimídia de OAs ainda é um processo complexo e demorado. O objetivo deste trabalho é apresentar o processo de design participativo usado na construção da Cacuriá, uma ferramenta que permite a professores e tutores a criação e compartilhamento de vídeos enriquecidos com conteúdo multimídia interativo. A interface do Cacuriá foi desenvolvida usando técnicas de design participativo, incluindo Grupo de Foco, Card Sorting e Prototipagem em Papel seguidas de um aprimoramento do design de interface. O artigo descreve, também, a arquitetura de implementação da ferrramenta Cacuriá. Por último, um estudo de caso foi conduzido para apresentação de uma possibilidade de construção de OAs utilizando a ferramenta Cacuriá sem exigir que o usuário conheça conceitos prévios de programação.

    At 5:00pm to 5:30pm, Wednesday 19th November

  • WTIC - Genius na Era da Internet das Coisas: Um jogo utilizando o Sphero e Dispositivos Móveis

    by Tiago Henrique, Silas Yudi, Paulo Alberto, Diego Ramon, Kyllder Medeiros and Tatiana Tavares

    Jogos da memória sempre foram muito utilizados como forma de distração, gerando um longo período de divertimento e interação social. Além disso, é sabido que tais jogos resultam em um desenvolvimento do raciocínio rápido, noção espacial e memória fotográfica. Entre os muitos jogos de memória existente, um tipo bastante conhecido é o composto com uma gama de cores, que dada uma dificuldade gradual produz uma sequência de cores, onde é esperado que o usuário de alguma forma interaja com o jogo, que este seja capaz de entrar com a sequência de cores correta anteriormente apresentada. O objetivo do projeto "Sphero Memory Challenge"é implementar um jogo de memória para plataforma Android, seguindo o padrão do clássico jogo Genius, com o diferencial que a parte da interação com o usuário, será feita usando a ferramenta Sphero, ela vai ser responsável em mostrar a sequência a ser memorizada. As tecnologias utilizadas no projeto são essencialmente a plataforma móvel Android, esta, por sua vez foi escolhida por ser uma plataforma aberta e líder do seu segmento, o que garante um maior potencial de usuários para o jogo. O Sphero por outro lado é um robô em forma de bola, que pode ser controlado por smartphones e tablets, possuindo diversas características, como sensores, capacidade de emitir cores e sons que podem ser usados como uma ferramenta de interação com o usuário. Procuramos com o auxílio do Sphero, repaginar a interação do clássico jogo de memória modernizando-o e adequando-o a uma nova dinâmica de interação com o jogador, com isso pretendemos atingir novos usuários, motivando-os a jogar e usufruir dos benefícios de um jogo de memorização.

    At 5:00pm to 5:30pm, Wednesday 19th November

  • WTVDI - Interactive TV interoperability and coexistence: the GLOBAL ITV project

    by Alan César Belo Angeluci, Gustavo Moreira Calixto, Maria Luiza Morandini, Roseli de Deus Lopes and Marcelo Knörich Zuffo

    At 5:00pm to 5:15pm, Wednesday 19th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • WTVDI - SEMINÁRIO REDAUTI

    At 5:15pm to 6:30pm, Wednesday 19th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • ST2 - Avaliação da Confiança em um Sistema Android para Detecção e Alerta de Quedas

    by Andressa Bezerra Ferreira, Rossana Maria de Castro Andrade, Leonardo Sabadini Piva and Reinaldo Bezerra Braga

    The number of people who need special care and living alone has increased significantly in recent years. To help and assist these people, ubiquitous systems and context-awareness systems to detect and alert falls have been being developed. However, the acceptance of such systems requires trust on user part. Trust is the belief of the user that the system uses your data properly and not cause any harm. This paper seeks to evaluate, through measures of software quality, trust in systems for detecting and warning falls. The case study realized evaluated the trust in a context-awareness Android system, which makes use of sensors to detect anomalies in everyday user activities.

    At 5:30pm to 5:45pm, Wednesday 19th November

  • ST2 - Anatomia de um interpretador de contexto semântico com suporte à notificação de eventos em tempo real

    by Guilherme Maranhão, Iwens Sene Júnior and Renato De Freitas Bulcão-Neto

    n order to deal with the complexity of context-aware applications’ development, the literature has reported an increasing demand for intelligent infrastructures which process heterogeneous context information and also provide real-time distributed communication. This paper outlines the Hermes software infrastructure to supporting the development of real-time, semantic context-aware applications. The main contribution is the anatomy of the Hermes Interpreter component in which the semantics of context is kept decoupled and context changes are notified in real-time. Benefits for applications developers include a reference architecture
    for context interpreters as well as the reuse of a complex infrastructure providing real-time distributed context notification. We have been working on a scenario of vital signs monitoring towards validating both the infrastructure and the interpreter component.

    At 5:45pm to 6:00pm, Wednesday 19th November

  • Opening Ceremony

    by Raoni Kulesza

    At 6:30pm to 7:00pm, Wednesday 19th November

  • Keynote Speaker - "Banana Pianos and Musical Cartoons: Designing for Musical Tinkerability"

    by Eric Rosenbaum

    What if you could build a piano out of bananas? Or invent a new musical instrument made from plants, pants, pop-tarts, papayas, or people? The MaKey MaKey invention kit lets you create physical-digital musical instruments like these and more, without requiring skills in electronics or programming. I'll also introduce an iPad app called MelodyMorph that lets you create playable musical instruments, compositions, and stories on a touchscreen. I'll talk about my experiences developing and testing these tools, and share some thoughts on how I design for learning through tinkering.

    At 7:00pm to 8:00pm, Wednesday 19th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

    Coverage video video

  • Keynote Speaker - 2050: A Small Travel Through the Previous 50 Years of Smart Media Eco-Systems: Smart Ubiquitous Media Eco-Sys

    by Artur Lugmayr

    "This keynote shall be a ‘small travel through time’ of media by revising its previous two decades of rapid development, and giving a visionary outline to its future as ‘smart media environment’ within the next 30 years. Today media industry is confronted with digitalization, emergence of new devices, numerous new business models, and numerous new technologies, which are rendering old traditional ways of thinking obsolete. Previously there was one medium, such as a TV screen or newspaper that was utilized to transmit the message or story. Today it’s an agglomeration of devices creating an aggregation of content - partially in behalves of the consumer in a personalized fashion. Traditional business models flipside, and media companies as e.g. newspaper companies are grasping for immediate solutions to remain competitive and stay afloat. Also, media industry is confronted with a rapid emergence of new technologies, as seen in book publishing, where digital books shapeshift the media landscape. Media designers are confronted to design content interactively, across platforms and delivery systems. However, are traditional ways of thinking in media really obsolete – or do they simply follow McLuhan’s law and transform to something that is based on principles of previous ‘old’ media?
    Today’s trends in media industry can be described with the keywords of interactivity, networked, sociability, mobility, experience, and intelligence. Interactive media became pre-dominant with the emergence of new media almost two decades ago with the emergence of the Internet. Social media, global communication, and creating digital communities are grounded on the emergence of new communication patterns that emerged with new technologies, and surfaced since a bit over a decade. These includes trends such as crowdfunding, crowdsourcing, and socializing anytime, anywhere, and anyhow. Today, mobility as major access platform for Internet services and localized services to access content is considered as part of our daily life, and changes our content consumption pattern significantly. The device becomes intelligent, and helps us in assisting in our daily tasks to navigate, locate, and ease communication between peers. Content and services blur and became an eco-system of content, services, and different media. In parallel, devices supporting us in daily tasks become increasingly more intelligent and seamlessly embedded throughout our national environment. These new services overlay our physical world with a digital one, and we access it via ubiquitous devices, such as e.g. Google glasses. Thus we are currently seeing the next revolution in media ecosystems – the development from social media towards intelligent, smart, ubiquitous media eco-systems. These services are offered as part of urban environments, where consumers demand new forms of experiences and increases the demand on media designers in creating eco-systems that promote consumer engagement.
    This keynote shall address an audience with a view on media from an artistic content creation, industrial, technical, and human perspective. It shall shade light on the latest trends in media industry, and how a potential future could emerge. The keynote revises current trends as e.g. crowdfunding, digitalization of the value chain, new media design methods, wearable devices, personalized services and decision support systems to support the consumer, digital games, and will give insights in the potential future of media as part of smart media environments. The keynote will be a small travel through the past decades of development of media, and shade light to its ‘smart’ future. The keynote is based on the two forthcoming books: “Convergent Divergence”, and “Information Systems and Management in Creative Industries” to be published by Springer-Verlag in early 2015.

    At 8:00pm to 9:00pm, Wednesday 19th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

    Coverage link

Thursday 20th November 2014

  • ST5 - Synchronizing Web Documents with Style

    by Rodrigo Laiola Guimaraes, Dick Bulterman, Pablo Cesar and Jack Jansen

    In this paper we report on our efforts to define a set of document extensions to Cascading Style Sheets (CSS) that allow for structured timing and synchronization of elements within a Web page. Our work considers the scenario in which the temporal structure can be decoupled from the content of the Web page in a similar way that CSS does with the layout, colors and fonts. Based on the SMIL (Synchronized Multimedia Integration Language) temporal model we propose CSS document extensions and discuss the design and implementation of a proof of concept that realizes our contributions. As HTML5 seems to move away from technologies like Flash and XML (eXtensible Markup Language), we believe our approach provides a flexible declarative solution to specify rich media experiences that is more aligned with current Web practices.

    At 2:00pm to 2:30pm, Thursday 20th November

  • ST7 - Web das Coisas: Configuração e Publicação Automáticas de Dispositivos

    by Daniel Bastos, Nailton Andrade and Cassio Prazeres

    A evolução da computação embarcada permitiu o surgimento de dispositivos que, ao se conectarem à Internet, dão origem à Internet das Coisas. A Web das Coisas tem a proposta de disponibilizar esses dispositivos como recursos para o desenvolvimento de aplicações utilizando os protocolos e padrões da Web. A variedade de dispositivos que podem se conectar à Web das Coisas demanda esforço de implementação de serviços específicos para acesso a cada dispositivo. Nesse contexto, este trabalho propõe a configuração e publicação automáticas de dispositivos como recursos na Web das Coisas, por meio de modelos que mapeiam suas funcionalidades. Este artigo também apresenta: a descoberta dinâmica dos dispositivos ao se conectarem a uma rede local utilizando-se das técnicas do protocolo Zeroconf; a geração automática de aplicações para publicar os dispositivos na Web das Coisas

    At 2:00pm to 2:30pm, Thursday 20th November

  • WFA - PG++: Uma ferramenta para a anotação da localização em fotografias digitais

    by Davi Oliveira Serrano de Andrade, Cláudio de Souza Baptista, Hugo Feitosa de Figueirêdo and George Henrique Queiroga de Abrantes

    The integration of GPS in smartphones, tablets and digital cameras become increasingly present, but GPS receivers do not work well indoors. This malfunction can generate information far removed from the actual location of where the picture was taken or no information. Thus, the paper presents PG++ a location annotation in personal digital photo collection tool which allows automatic location propagation between photos. The focus of the tool is to minimize the number of photos geotagged by the user and to maximize automatically geotagged photos. Besides the proposed minimization, PG++ extracts metadata and organizes the collection into spatial clusters.

    At 2:00pm to 2:25pm, Thursday 20th November

  • WTVDI - Propuesta de marcación de contenidos multimedia educativos en entornos de IPTV

    by Angela María Vargas Arcila, Sandra Baldassarri and José Luis Arciniegas Herrera

    At 2:00pm to 2:15pm, Thursday 20th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • WTVDI - Capacitación orientada a elevar el desempeño de los expertos de usabilidad que intervienen en la realización de evaluaci

    by Delmys Pozo Zulueta, Yeniset León Perdomo, Ailyn Febles Estrada, Yusleydi Fernández Del Monte, Adisleydis Rodríguez Alvarez and Yanet Brito Riverol

    At 2:15pm to 2:30pm, Thursday 20th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • WFA - Uma plataforma para avaliar a experiência dos usuários com aplicativos para smartphones

    by Artur Kronbauer, Díferson Machado and Celso Alberto Saibel Santos

    In recent years, after the great proliferation of mobile devices, the relationship between usability, context and emotions of the users is a widely discussed in studies related to user experience (UX) theme. Evaluations show that humans typically interact with computer systems in unusual ways and have different feelings about the applications. To contribute to this area of study, this paper presents a platform for the collection and analysis of data related to the user experience of mobile data. To evaluate the potential of the platform, an experiment was conducted with the participation of 68 people, for thirty days. The study results are presented and discussed throughout the paper.

    At 2:25pm to 2:50pm, Thursday 20th November

  • ST5 - ImQET: Objective Stereoscopic Image Quality Evaluation Tool

    by Jose Vinicius de Miranda Cardoso, Carlos Danilo Miranda Regis and Marcelo Sampaio Alencar

    This paper describes an application for full-reference stereoscopic
    image quality assessment. The application was developed using Mono framework
    and C\# programming language. It is an independent platform and provides a
    friendly Graphical User Interface (GUI). The stereoscopic image signals used in
    the application are based in a two-view model. The application has objective
    image quality algorithms, such as PSNR, SSIM and PW-SSIM and incorporates a
    recently published technique for stereoscopic image quality assessment, called
    Disparity Weighting (DW). Numerical results corresponding to the performance of
    the objective measurements obtained using the proposed application are
    presented. The application can be used by academia and industry, for
    standardization and development of objective algorithms and evaluation of
    impairments in stereoscopic image signals caused by processing techniques.

    At 2:30pm to 3:00pm, Thursday 20th November

  • ST7 - Um Framework Baseado em Metadados para Análise de Degradação de Atributos de Qualidade em Sistemas Web

    by Felipe A. P. Pinto, Uirá Kulesza, Leo Silva and Eduardo Guerra

    This paper presents a metadata-based framework for software architecture evaluation of quality attributes. It implements a scenario-based approach that uses dynamic analysis and code repository mining to provide an automated way to reveal degradations of scenarios on releases of web-based systems. The evaluation process has three phases: (i) dynamic analysis that collects information of scenarios in terms of measurable quality attributes; (ii) degradation analysis that processes and compares the results of the dynamic analysis in term of quality attributes for two or more existing releases of a web-based system to identify degraded scenarios considering the desired quality attributes; (iii) repository mining that looks for development issues and commits associated to code assets of the degraded scenarios. The paper also presents and discusses the obtained results of the framework instantiation for the library module of a large-scale web system.

    At 2:30pm to 3:00pm, Thursday 20th November

  • WTVDI - Estudio de la usabilidad de gestos para el control de un Smart TV

    by Francisco Jose Perales and Silvia Ramis Guarinos

    At 2:30pm to 2:45pm, Thursday 20th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • WTVDI - Processo metodológico para alicerçar a seleção de métodos de identificação de utilizadores seniores em aplicações de TV

    by Telmo Silva

    At 2:45pm to 3:00pm, Thursday 20th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • WFA - GT-IMAV: Ferramentas para Instrumentação e Monitoração de Aplicações de Vídeo

    by Lucas Chigami, Michael Hernandez, Reinaldo Matushima, Adriano Adorya, Itana Stiubiener, Graça Bressan, Regina Silveira and Wilson Ruggiero

    Projeções indicam que vídeo será responsável por 90% do tráfego de rede até o final da década. Este artigo apresenta um conjunto de ferramentas de monitoração que permitem levantar dados de consumo de vídeo distribuído através da Internet, tanto com relação ao grau de absorção de conhecimento do consumidor, sua satisfação com relação à qualidade do vídeo e do conteúdo e seu comportamento com relação a página web que o apresenta, como com relação ao consumo de recursos utilizados. Para que estas ferramentas fossem validadas, elas foram integradas a uma instância do sistema de vídeo sob demanda da RNP (vídeo@RNP) e as avaliamos dentro de um cenário de uso de vídeo como instrumento para o ensino/aprendizado e para divulgação cultural.

    At 2:50pm to 3:15pm, Thursday 20th November

  • ST5 - Enhancing Redundancy in Wireless Visual Sensor Networks for Target Coverage

    by Daniel G. Costa, Ivanovitch Silva, Luiz Affonso Guedes, Paulo Portugal and Francisco Vasques

    Wireless visual sensor networks provide valuable information for many monitoring and control applications. Sometimes, a set of targets need to be monitored by deployed camera-enabled sensors. For those networks, however, some active visual sources may fail, potentially degrading the application monitoring quality when targets become uncovered. Moreover, some applications may need different perspectives of the same target. As visual sensors will be used to monitor a set of targets, a high level of monitoring redundancy may be required and an effective way to achieve that is assuring that targets are being concurrently viewed by more than one visual sensor. We propose a centralized greedy algorithm to enhance redundancy in wireless visual sensor networks when visual sensors with adjustable orientations are deployed. Moreover, as some targets may be more critical for the application, we propose a balanced configuration of the sensors' poses in order to find an optimized configuration of the deployed visual sensors. We expect that the proposed approach can improve monitoring availability or even monitoring redundancy of wireless visual sensor networks deployed for target coverage.

    At 3:00pm to 3:30pm, Thursday 20th November

  • ST7 - WebMedia XX: Quem Somos e o Que Temos Feito nas Últimas Duas Décadas

    by Alexandre Duarte, Moacir Lopes de Mendonça Júnior, Jansen Souza, Alisson Brito, Fernando Trinta and Ricardo Viana

    In the paper we analyze the scientific articles published in all previous WebMedia editions in order to provide a bird’s eye view over the Brazilian Multimedia Community and to show how the research topics addressed in the WebMedia series of events have evolved over the time. We used Social Network Analysis techniques to identify research groups, clusters and topics on papers presented in the WebMedia events over the last two decades.

    At 3:00pm to 3:30pm, Thursday 20th November

  • WTVDI - Avaliação do Tempo de Espera de Autenticação para Aplicações Personalizadas de TV Digital

    by Luis Nícolas De A. Trigo and Carlos André Guimarães Ferraz

    At 3:00pm to 3:15pm, Thursday 20th November

    In Centro de Convenções de João Pessoa “Poeta Ronaldo Cunha Lima”

  • WFA - LoCCAMConfigurator: Uma Ferramenta para Modelagem Visual de Configurações de um Middleware de Suporte à Aplicações Conscie

    by Paulo Artur de Sousa Duarte, Francisco Anderson de Almada Gomes, Felipe Mota Barreto, Windson Viana de Carvalho and Fernando Trinta

    The paper aims to describe the architecture and the main features of LoCCAMConfigurator, a tool for visual modeling of context information and contextual rules. This tool assists mobile application developers in the task of modelling context information from their applications and to define context-aware behaviors. LoCCAMConfigurator uses model-driven engineering approach for context modeling and subsequent automatic code generation. The tool uses the models created by the users in order to generate an Android project and a configured version of the context-aware middleware LoCCAM (Loosely Coupled Context Acquisition Middleware). This Android project includes the library and methods of communication between LoCCAM and the future application being developed. All the code for dealing with context gathering, filtering, detection and query is generated by the tool, then, developers can concentrate in the business part of their application.

    At 3:15pm to 3:50pm, Thursday 20th November

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