Elementos de interoperabilidade na catalogação descritiva: configurações contemporâneas para a modelagem de ambientes informacionais digitais

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Modelos conceituais de dados como parte do processo da catalogação: perspectiva de uso dos FRBR no desenvolvimento de catálogos bibliográficos digitais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Gerenciamento de mobilidade transparente com suporte integrado a QoS/QoE em redes heterogêneas

Os avanços nas tecnologias de comunicação sem fio, a demanda por novas aplicações multimídia em tempo real, com requisitos de Qualidade de Serviço (QoS) e Qualidade de Experiência (QoE), e a proliferação de equipamentos móveis, originam o surgimento de soluções que permitem mobilidades horizontais e verticais em redes heterogêneas, de modo transparente. Esses dispositivos móveis apresentam múltiplas interfaces sem fio, onde os usuários se conectam para realizar tarefas e serviços variados no seu dia a dia, mediante a tecnologia de redes diferentes, proporcionando um cenário heterogêneo com diversas oportunidades de conectividade para os usuários móveis. Visando solucionar o problema de várias conexões, feitas por usuários móveis, em uma mesma rede Wi-Fi (Wireless Fidelity) e/ou WiMAX (Worldwide Interoperability for Microwave Access) com diferentes serviços executados, porém, utilizando incorretamente a rede, esta dissertação propõe uma técnica hierárquica de decisão de mobilidade transparente, baseada em uma função de custo, no padrão IEEE 802.21 e no mapeamento de classes de serviço para garantir QoS/QoE para usuários em períodos de mobilidade chamada de MIH2Q, onde essa política informa a melhor rede para ser utilizada, de acordo com o serviço utilizado pelo usuário móvel. A avaliação do impacto e os benefícios da proposta são feitas através de simulação no NS-2 (Network Simulator - version 2) e no evalvid, utilizando métricas de QoS e QoE para verificação dos resultados.

Modelo conceitual de geoinformação: proposta para o município de Feira de Santana - Bahia

Pós-graduação em Geografia - IGCE

Sistema multiagente web semântico para gestão de conteúdos educacionais

Pós-graduação em Ciência da Computação - IBILCE

Mapas topográficos: metadados e as regras de catalogação para o acesso eficiente à informação geográfica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

MODEL-BASED COMPENSATION FOR BURST MESSAGE LOSS IN WIRELESS NETWORKED CONTROL SYSTEMS: EXPERIMENTAL RESULTS

A recent trend in networked control systems (NCSs) is the use of wireless networks enabling interoperability between existing wired and wireless systems. One of the major challenges in these wireless NCSs (WNCSs) is to overcome the impact of the message loss that degrades the performance and stability of these systems. Moreover, this impact is greater when dealing with burst or successive message losses. This paper discusses and presents the experimental results of a compensation strategy to deal with this burst message loss problem in which a NCS mathematical model runs in parallel with the physical process, providing sensor virtual data in case of packet losses. Running in real-time inside the controller, the mathematical model is updated online with real control signals sent to the actuator, which provides better reliability for the estimated sensor feedback (virtual data) transmitted to the controller each time a message loss occurs. In order to verify the advantages of applying this model-based compensation strategy for burst message losses in WNCSs, the control performance of a motor control system using CAN and ZigBee networks is analyzed. Experimental results led to the conclusion that the developed compensation strategy provided robustness and could maintain the control performance of the WNCS against different message loss scenarios.

Representação e descrição de recursos informacionais: aspectos estruturantes no delineamento de ambientes informacionais digitais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ontologias, categorias e interoperabilidade semântica

Explores the concept of interoperability as a means of cooperation, stressing the importance of promoting them from consistent information policies. Highlights the dependence of interoperability to the variations of language that account for sociocultural differences and associates its realization to common ontology construction as a means of enabling structures that can be integrated. Emphasizes the importance of using categories to provide the entire organization and to facilitate access by offering support the process of categorizing on concrete terminologies of specific domains and areas of activity, discourse communities references or of the speeches actually made.

Web Service para geração de VRS no contexto de posicionamento GPS

Internet is fully inserted in contemporary society, specially in relation to entertainment services and trading. Its reach has transposed the traditional desktop computer models coming to mobile devices like cell phones and GPS receivers. Likewise, the scientific community takes its benefits, both for publication of studies and for communication between clusters processing information, such as at LHC, located in Switzerland. Concerning geodetic positioning, researches in the area present the concept of Virtual Reference Stations - VRS, in which is necessary a communication way between the real reference stations and a central system as well as between central system and a service requester. In this work, we analyze the current solutions for generation of VRS with regard to data delivery for the service requester and present a solution based on Web Services as an alternative to the model being developed by Spatial Geodesy Study Group – GEGE/FCT/UNESP. Comparing solutions, it was verified the potential of Web Services to aid in researches of geodetic positioning using VRS. Using such technology, it is obtained interoperability, providing greater flexibility to develop client applications, both development carried out by researchers of the university or by any person or enterprise wishing to use the service

Estudo da padronização visando à interoperabilidade: o caso das organizações de saúde na cidade de Marília- São Paulo

Pós-graduação em Ciência da Informação - FFC

Televisão e mídias digitais na América Latina: um cenário em construção

The text is the initial result of a project called Global iTV, Interactive and systems Hybrid TV: a new advanced scheme for future services and applications in a global environment, contemplated by Call MCTI / CNPq 13/2012 – EUBrazil Cooperation Program in the field of Information and Communication Technologies (ICT) which has as its central theme the development of a standard that enables interoperability between the various digital TV systems operating jointly, exchanging and using information. Thus, using bibliographical and documentary research, the article goes on to demonstrate how this perspective panorama is drawing from the advent of digital television and the use of technology in Latin America, seeking to identify similarities, differences, problems and solutions arising from the use and consumption of digitizing television signal in the region. The results demonstrate the importance of media convergence, but point out that there are still large sections of the population on the margin of the Digital Society and the benefits provided by digital networks and that poverty and poor education are important contributions to this scenario.

Assessment of modernized GPS L5 SNR for ground-based multipath reflectometry applications

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Elementos de interoperabilidade na perspectiva da catalogação descritiva

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Introdução a ontologias e suas aplicações

Different vocabularies and contexts are barriers to the communication between people or software systems. It is necessary a common understanding in the domain that is talked about, so it can be obtained a correct interpretation of the information. An ontology formally models the structure of a domain and turn explicit the shared understanding in the form of concepts and relations that emerge from its observation. Constitutes a sort of framework used in the mapping to the meaning of the information that is talked about. The formal accuracy in which they are defined, by means of axioms, allow machine processing, implicating in systems interoperability. Structured this way, the knowledge is easily transferred between people or systems from different contexts. Ontologies present several applications nowadays. They are considered the infra-structure to the Semantic Web, which is composed by Web resources with embedded meaning. Thereby, the automatic execution of complex tasks is allowed, with the benefit from the effective communication between Web software agents. Among other applications, they also have been used to structure the knowledge generated from several areas, like Biology and Software Engineering.