Heterogeneous Distributed System
Mostrando 13-24 de 36 artigos, teses e dissertações.
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13. Schema quality analysis in a data integration system
Information Quality (IQ) has become a critical topic in organizations and, consequently, in Information Systems research. Poor information quality can have a severe impact on the overall effectiveness of an organization. The growth of data warehouses and the direct access to information from various sources by managers and information users have increased th
Publicado em: 2008
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14. Estudo do comportamento de corrosão dos intermetálicos presentes na liga AA 2024-T3, por meio de técnicas de microscopia associada a técnicas eletroquímicas / INVESTIGATION ON THE CORROSION BEHAVIOUR OF THE INTERMETALLICS IN THE AA 2024-T3 ALLOY BY MICROSCOPY ASSOCIATED TO ELECTROCHEMICAL TECHNIQUES.
The AA2024-T3 aluminium alloy is largely used in the aerospace industry. It has high mechanical properties due to the presence of alloying elements, mainly copper, that form finely distributed precipitates coherent with the matrix, during controlled aging treatment. However, during this process, large intermetallics (IMs) are also formed with composition and
Publicado em: 2008
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15. Digital TV transmission monitoring system for heterogeneous converging networks. / Sistema de monitoramento de transmissão de TV digital em redes convergentes heterogêneas.
The great evolution in the telecommunication systems related to the transmission of multimidia contents in the data communication networks and TV transmission, demands management solutions in which regards quality of end-to-end services. Taking this scenario into consideration, it is proposed in this work the definition and implementation of a solution to mo
Publicado em: 2007
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16. GRIDFS: SERVER FOR GRIDS AND HETEROGENEOUS DISTRIBUTED ENVIRONMENTS / GRIDFS: UM SERVIDOR DE ARQUIVOS PARA GRADES E AMBIENTES DISTRIBUÍDOS HETEROGÊNEOS
Grid computing allows the use of distributed networks resources for tasks requiring a high processing power. A Grid infra-structure may help in the execution of these tasks and is able to coordinate their related activities, possibly regarding the provision of data files for the tasks executing in the grid nodes. GridFS is a system that enables data sharing
Publicado em: 2006
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17. Avaliação de desempenho de método para a resolução da evolução temporal de sistemas auto-gravitantes em dois paradigmas de programação paralela:troca de mensagens e memória compartilhada
In this work it is presented the performance evaluation of a parallel implementation for the sympletic integrator to simulate the temporal evolution of a self-gravitating system. The algorithm of the sympletic integrator was parallelized and the source code was written in the C programming language. Two parallel programming paradigms were employed: message p
Publicado em: 2006
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18. Caracterization and oxidation of organic compounds in wastewater from wet processing of coffee berries. / CaracterizaÃÃo e oxidaÃÃo de compostos orgÃnicos nas Ãguas residuÃrias da despolpa Ãmida dos frutos do cafeeiro.
The wet processing of coffee berry is one of the most pollutant activities in brazilian agriculture. The main disadvantage of this method is the large volume of water used, wich returns to the environment with low quality. The goal of this work was to study the organic composition of the wastewater, as well as to prepare and test catalysts in order to oxidiz
Publicado em: 2006
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19. SESAMO : um controlador de concorrência que implementa a serialidade semântica de forma descentralizada em sistemas de bancos de dados múltiplos com suporte a mobilidade
In a mobile multidatabase system, there is a collection of autonomous, distributed, heterogeneous and mobile component database systems which are interconnected by means of a wireless network. In such an environment, each network node can access multiple databases of that collection by means of global transactions whose concurrency is managed by a scheduler,
Publicado em: 2005
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20. SISTEMA INTELIGENTE DE OTIMIZAÇÃO DE ALTERNATIVAS DE DESENVOLVIMENTO DE CAMPOS PETROLÍFEROS / INTELLIGENT SYSTEM FOR OPTIMIZATION OF ALTERNATIVES FOR PETROLEUM FIELDS DEVELOPMENT
This work investigates the problem of optimization of alternatives for petroleum fields` development. A development alternative refers to the way a well-known and delimited petroleum field is placed in production. This process involves the determination of the number, localization and scheduling of producer and injector wells. Thus, the optimization of alter
Publicado em: 2005
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21. Reconhecimento de padrões proteômicos e genômicos por aprendizagem de máquinas para o disgnóstico médico. / Employ machine learning to unveil encrypted molecular patterns within proteomic and genomic profiles to assist in personalized medical diagnosis.
Motivation: Employ machine learning to unveil encrypted molecular patterns within proteomic and genomic profiles to assist in personalized medical diagnosis. Results and conclusions: 1. Proteomic profile studies: Patients with Hodgkins disease (HD), a rare type of lymphoma, had their serum proteomic profile compared to control subjects (CS) in order to searc
Publicado em: 2005
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22. Plan B: boxes for networked resources
Nowadays computing environments are made of heterogeneous networked resources, but unlike environments used a decade ago, the current environments are highly dynamic. During a computing session, new resources are likely to appear and some are likely to go offline or to move to some other place. The operating system is supposed to hide most of the complexity
Journal of the Brazilian Computer Society. Publicado em: 2004-07
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23. "Índices de carga e desempenho em ambientes paralelos/distribuídos - modelagem e métricas" / Load and Performance Index for Parallel/Distributed System - Modelling and Metrics
This thesis approaches the problem of evaluating an adequate load index or a performance index, for using in process scheduling in heterogeneous parallel/distributed computing systems. A wide literature review with the corresponding critical analysis is presented. This review is the base for the comparison of the existing metrics for the evaluation of the co
Publicado em: 2004
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24. Metaheuristicas aplicadas ao planejamento da expansão da transmissão de energia eletrica em ambientes de processamento distribuido
In this work, several combinatorial metaheuristics are developed for solving the transmission expansion planning problem of electric power systems that is analysed considering the static and long-term approach, e.g. a parallel version of the simulated annealing methodology and several parallel versions of a genetic algorithms, besides an asynchronous team wh
Publicado em: 2004