Computational Grids
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. 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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14. Simulador eletromagnético em um ambiente de grades computacionais / Eletromagnetic simulator in a grid computing environment
The aim of this work is to develop the Pre and Post-Processing stages from an electromagnetic simulation suite, called SSAR-BR, and also a grid computational environment, which permits the execution of large electromagnetic problems. The processing stage, based in the Finite Difference Time Domain (FDTD) method, has been already developed as part of a doctor
Publicado em: 2010
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15. Planejamento de experimentos com várias replicações em paralelo em grades computacionais / Towards distributed simulation design of experiments on computational grids
Este trabalho de mestrado apresenta um estudo de Grades Computacionais e Simulações Distribuídas sobre a técnica MRIP. A partir deste estudo foi possível propor e implementar o protótipo de uma ferramenta para Gerenciamento de Experimento em Ambiente de Grade, denominada Grid Experiments Manager - GEM, organizada de forma modular podendo ser usada como
Publicado em: 2010
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16. Análise,Simulações e Aplicações Algorítmicas de Caminhadas Quânticas / Analysis,Simulations and Algorithmic Applications of Quantum Walks
Quantum computing is a model of computation based on the laws of quantum mechanics, which can be used to develop faster algorithms. The development of efficient quantum algorithms, however, is a highly challenging task. A recent successful approach is the use of quantum walks. In this work, we have studied the quantum walk on the hypercube, obtaining the exa
Publicado em: 2010
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17. Escalonadores de tarefas dependentes para grades robustos as incetezas das informações de entrada / Robust dependent task schedulers for grid networks
Para que escalonadores em grades derivem escalonamentos, é necessário que se forneçam as demandas das aplicações e as disponibilidades dos recursos das grades. No entanto, a falta de controle centralizado, o desconhecimento dos usuários e a imprecisão das ferramentas de medição fazem com que as informações fornecidas aos escalonadores difiram dos
Publicado em: 2010
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18. Performance evaluation of a discovery and scheduling protocol for multihop ad hoc mobile grids
Despite the many research efforts addressing the integration of mobile nodes into grids, only a few of them have considered the establishment of mobile grids over wireless ad hoc networks (hereafter, mobile ad hoc grids). Clearly, such grids need specialized resource discovery and scheduling mechanisms. To the best of our knowledge, though, the research on t
Journal of the Brazilian Computer Society. Publicado em: 2009-12
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19. A comparative study of implicit and explicit methods using unstructured voronoi meshes in petroleum reservoir simulation
This work presents a comparative study among three linearization schemes widely used in petroleum reservoir simulation, namely the Implicit Pressure Explicit Saturation (IMPES), Fully Implicit (FI) and Adaptive Implicit Method (AIM). Attention is given to the criterion used for switching from IMPES to FI and vice-versa. The black-oil model considering the oi
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-12
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20. Strategies for computational resources trading in desktop grids / Estrategias para comercialização de recursos computacionais em desktop grids
The association of idle machines in desktop grids architectures represents a significant progress in the solution of complex problems in areas as science, engineering, trade and others. The difficulty in the implementation and in the continuity of these architectures is to maintain the levels of availability demanded by their users. In its majority, the user
Publicado em: 2009
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21. Acesso Móvel aos Serviços do Middleware InteGrade / Mobile Access Services Middleware InteGrade
Mobile computing technologies and wireless networks have evolved very quickly. Nowadays, many of the portable devices have significant processing power, storage and communication capacity. At the same time, grid computing technology became an important tool for collaborative work among users and organizations enabling the sharing of computing resources and s
Publicado em: 2009
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22. On the use of substructures in complex structures modeling. / Sobre o uso de subestruturas na modelagem de estruturas complexas.
In engineering, there are several structural analysis techniques leading to obtain displacements and efforts with a considerable degree of efficacy and accuracy, and, among these, there is the SUBSTRUCTURING technique. This method consists in the division and analysis of a complete structural model, by subdividing his field in SUBSTRUCTURES, allowing a consi
Publicado em: 2009
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23. VXDL: A LANGUAGE FOR INTERCONNECTION AND RESOURCES SPECIFICATION IN VIRTUAL GRIDS / VXDL: UMA LINGUAGEM PARA DESCRIÇÃO DE INTERCONEXÕES E RECURSOS EM GRADES VIRTUAIS
Grid computing has been defined as an infrastructure integrator of distributed resources. Although it is already used on a large scale in many areas, this type of computational infrastructure is still an area of active research, with many open questions. Today, new research works investigate the application of resources virtualization techniques to perform t
Publicado em: 2008
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24. AUTONOMIC PARALELIZATION OF METAHEURISTICS IN COMPUTATIONAL GRIDS / PARALELIZAÇÃO AUTONÔMICA DE METAHEURÍSTICAS EM AMBIENTES DE GRID
The development of autonomic parallel metaheuristics to be efficiently executed in computational grid is the challenge of this thesis. The parallel application must be able to self-adjust to the changes that occur dynamically in the environment, without the user needing to interfere directly in the code of the application. For this, the autonomic metaheurist
Publicado em: 2008