Arquitetura modular para middleware de televisão digital

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Ciência da Computação, Florianópolis, 2011As especificações abertas de middleware de televisão digital não definem características internas de sua arquitetura. Como resultado, as implementações existentes não são tão flexíveis, extensíveis e adaptáveis como deveriam. Este trabalho propõe uma arquitetura modular para ambientes procedurais em middlewares de televisão digital, que permite a fácil extensão e atualização, fornecendo uma maneira simples de adicionar novos recursos e utilizar serviços internos à camada de middleware. Esta arquitetura é baseada no framework OSGi e seus componentes de software, chamados bundles. Uma categorização destes bundles é proposta, baseada em diferentes cenários de uso, de acordo com a indústria e as necessidades de inovação do mercado. Protótipos da arquitetura e bundles foram implementados e testes realizados para mostrar a viabilidade desta abordagem.The currently open specifications for Digital Television (DTV) middleware do not define the internal characteristics of their architecture. As a result, the existing middleware implementations are not as flexible, extensible and adaptable as they should be due to the adoption of a closely-coupled architecture. This paper proposes a modular architecture for execution enviromnent on DTV middleware, which allows easy extension and updating, providing a simple way to add new features to the middleware. This architecture is based on the OSGi framework and its software omponents, called bundles. A categorization of these bundles was roposed, based on different usage scenarios that were identified, according to industry time-to-market and innovation needs. Prototypes of the architecture and of bundles have been implemented, and tests performed with these prototypes show the feasibility of this approach

Ubiquitous Computing

The aim of this book is to give a treatment of the actively developed domain of Ubiquitous computing. Originally proposed by Mark D. Weiser, the concept of Ubiquitous computing enables a real-time global sensing, context-aware informational retrieval, multi-modal interaction with the user and enhanced visualization capabilities. In effect, Ubiquitous computing environments give extremely new and futuristic abilities to look at and interact with our habitat at any time and from anywhere. In that domain, researchers are confronted with many foundational, technological and engineering issues which were not known before. Detailed cross-disciplinary coverage of these issues is really needed today for further progress and widening of application range. This book collects twelve original works of researchers from eleven countries, which are clustered into four sections: Foundations, Security and Privacy, Integration and Middleware, Practical Applications