Distributed Algorithms
Mostrando 13-24 de 88 artigos, teses e dissertações.
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13. Indexing and querying dataspaces
Over theWeb, distributed and heterogeneous sources with structured and related content form rich repositories of information commonly referred to as dataspaces. To provide access to this heterogeneous data, information integration systems have traditionally relied on the availability of a mediated schema, along with mappings between this schema and the schem
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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14. Forecasting the expansion of the invasive golden mussel Limnoperna fortunei in Brazilian and North American rivers based on its occurrence in the Paraguay River and Pantanal wetland of Brazil.
The bivalve Limnoperna fortunei (Dunker, 1857), also called golden mussel, is native to Asia but becoming dispersed around the world. The golden mussel resembles the invasive dreissenid bivalves in many respects, and although much less studied it evidently has broader environmental tolerances. The golden mussel was introduced into the La Plata River estuary
Aquatic Invasions. Publicado em: 2011
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15. Algoritmos para escalonamento de tarefas dependentes representadas por grafos acíclicos direcionados em grades computacionais / Scheduling algorithms for dependent tasks represented by directed acyclic graphs on computational grids
Computational grids are potentially large distributed systems composed of heterogeneous resources connected by a network with heterogeneous links. These systems became largely used in the execution of tasks which require large processing capacities. Because they are shared systems, task submission in grids independently originate from a number of users, lead
Publicado em: 2010
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16. Um estudo para o problema de ordenação total de mensagens aplicado a redes Bluetooth com restrições fracas de tempo real / A study to total order message problem applied to Bluetooth networks using real time weak constraints
O estudo crítico apresentado discute o problema de ordenação de mensagens, típico da área de sistemas distribuídos, contextualizado em um ambiente de comunicação Bluetooth. Por ainda serem poucos os trabalhos com tal foco na bibliografia atual, este provê uma visão geral do comportamento de uma classe específica de protocolos distribuídos, quando
Publicado em: 2010
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17. Uma arquitetura de software para replicação baseada em consenso / A software architecture for consensus based replication
Esta tese explora uma das ferramentas fundamentais para construção de sistemas distribuídos: a replicação de componentes de software. Especificamente, procuramos resolver o problema de como simplificar a construção de aplicações replicadas que combinem alto grau de disponibilidade e desempenho. Como ferramenta principal para alcançar o objetivo des
Publicado em: 2010
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18. Algoritmo de roteamento Anycast baseado em algoritmos genéticos para redes tolerantes a atrasos e desconexões / Anycast Routing Algorithm Based on Genetic Algorithms for Delay and Disruption Tolerant Networks
DTNs (Delay and Disruption Tolerant Networks) have the potential to interconnect devices and areas of the world that are underserved by traditional networks. The development of these networks can lead to the revolution of the technology information for the population in developing countries which lack infrastructure, especially in remote and rural regions. I
Publicado em: 2010
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19. WSARCH: Uma arquitetura para a provisão de web services com qualidade de serviço / WSARCH: an architecture for web services provisioning with quality of service
This thesis aims at the design and implementation of a service-oriented architecture, named WSARCH - Web Services Architecture, which allows accessing Web Services with Quality of Service (QoS). The attributes of QoS that shall be considered, aiming at evaluating the performance of Web Services in order to achieve QoS in a service-oriented architecture are i
Publicado em: 2010
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20. LALP: a language for parallelism of loops exploitation in reconfigurable computing / LALP: uma linguagem para exploração do paralelismo de loops em computação reconfigurável
Reconfigurable computing is becoming increasingly important in embedded and high-performance computing systems. It allows performance levels close to the ones obtained with Application-Specific Integrated circuits (ASIC), while still keeping design and implementation flexibility. However, to efficiently program devices, one needs the expertise of hardware de
Publicado em: 2010
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21. Busca exaustiva em redes P2P
Apesar de inúmeros esforços nos últimos anos, buscas complexas ecientes em redes P2P de grande escala permanecem um problema em aberto e desaador. Replicações massivas de dados e de mensagens de buscas são duas estratégias comuns utilizadas para melhorar taxas de sucesso e tempos de resposta das diversas técnicas propostas. Entretanto, estratégias d
Publicado em: 2010
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22. A standards-based framework to foster geospatial data and process interoperability
The quest for interoperability is one of the main driving forces behind international organizations such as OGC and W3C. In parallel, a trend in systems design and development is to break down GIS functionalities into modules that can be composed in an ad hoc manner. This component-driven approach increases flexibility and extensibility. For scientists whose
Journal of the Brazilian Computer Society. Publicado em: 2009-03
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23. Framework para escalonamento distribuído de processos utilizando sistema multiagentes em sistemas de produção
The study of techniques for processes schedulers is linked to the creation of the first operational systems (OS), with the process schedulers algorithms with and without preemption. However, the use of processes schedulers reaches other areas besides OS. It affects all the problems where there is a set of tasks to be executed and a set of executing units. Th
Publicado em: 2009
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24. Análise de modelos geológicos utilizando percolação dinâmica
In the present study we elaborated algorithms by using concepts from percolation theory which analyze the connectivity conditions in geological models of petroleum reservoirs. From the petrophysical parameters such as permeability, porosity, transmittivity and others, which may be generated by any statistical process, it is possible to determine the portion
Publicado em: 2009