Electrical Power System
Mostrando 25-36 de 207 artigos, teses e dissertações.
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25. Long-term correlation of the electrocorticogram as a bioindicator of brain exposure to ionizing radiation
Understanding the effects of radiation and its possible influence on the nervous system are of great clinical interest. However, there have been few electrophysiological studies on brain activity after exposure to ionizing radiation (IR). A new methodological approach regarding the assessment of the possible effects of IR on brain activity is the use of line
Braz J Med Biol Res. Publicado em: 12/06/2015
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26. Study and characterization of indium oxynitride photoconductors
Multifunctional materials are a new class of thin films and coatings. These materials show interesting characteristics for application in many scientific areas, in special electronic and photonic technologies. These characteristics include sensitivity for thermal, light, mechanical, chemical and other influences, high resistivity, high electrical isolation a
Mat. Res.. Publicado em: 03/12/2013
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27. Study of indium nitride and indium oxynitride band gaps
This work shows the study of the optical band gap of indium oxynitride (InNO) and indium nitride (InN) deposited by magnetron reactive sputtering. InNO shows multi-functionality in electrical and photonic applications, transparency in visible range, wide band gap, high resistivity and low leakage current. The deposition processes were performed in a magnetro
Mat. Res.. Publicado em: 07/05/2013
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28. ESTUDO DE UM REATOR SOLAR HÍBRIDO PARA CURA ACELERADA DO CONCRETO EM ÁGUA MORNA. / STUDY OF A HYBRID SOLAR REACTOR FOR ACCELERATED CURING OF CONCRETE IN WARM WATER.
The Portland cement concrete material is the most consumed after the water worldwide due to their versatility molding, strength and durability as a structural material. The curing is the procedure that aims to keep the concrete saturated with water in their early ages and it is essential to ensure the reactions of cement hydration, promoting its consolidatio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/11/2012
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29. Uma proposta de modelagem de condicionadores de ar split visando a análise de pedidos de ressarcimento por danos elétricos
The large number of refunding request for electrical and electronic equipment damages has attracted the attention of the electric utilities, consumers, regulatory and other government agencies. Such concerns are not associated only with the financial contents involved, but especially with the social impacts associated to requests, decisions, conflicts and ot
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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30. Determinação de um parâmetro para monitoramento do desempenho de mensagens GOOSE do padrão IEC 61850 utilizadas em subestações de energia elétrica / Determination of a parameter for monitoring the performance of GOOSE messages used in electric power substations
O desenvolvimento e utilização do padrão IEC 61850 alterou a concepção e operação das subestações de energia elétrica. O desempenho e confiabilidade do sistema de proteção depende da rede de comunicação de dados. Esta pesquisa propõe um parâmetro de dimensionamento e comparação de desempenho para o tempo de transferência das mensagens Gene
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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31. Three-phase representation of structural and operational unbalances on distribution system / Representação trifásica de desequilíbrios estruturais e operacionais em sistema de média tensão de distribuição
A complexidade crescente dos estudos em sistemas de distribuição demanda uma formulação e modelagem capazes de agregar os desequilíbrios estruturais e operacionais dos sistemas elétricos de distribuição aos resultados das condições operacionais em regime permanente. Neste trabalho, aborda-se a representação trifásica em sistemas elétricos de m�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/06/2012
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32. Aplicação de redes inteligentes nas instalações elétricas residenciais / Application of smart grid in residential electrical installations.
Electricity as an energy resource acquired vital importance in modern society because it allows relatively easily meet the demand for their services. Thus the demand for electricity increases with the evolution of populations who benefit from. The electrical system that produces this input is limited in its ability to available resources for generation, tran
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/04/2012
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33. Desenvolvimento de uma centrífuga de alta rotação eletronicamente monitorada para pesquisa em biologia espacial
This work presents the development of an centrifuge prototype for experiments with vegetables. Its main features are the high mechanical performance and instruments. In more details are presented the specification, implementation, validation and performance assessment through a case study. Its high speed and stability generates a vector component of centrifu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2012
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34. Aplicação de sistemas multiagentes para gerenciamento de sistemas de distribuição tipo Smart Grids / Application of multiagent systems for management of distribution systems like Smart Grids
Smart grids are taken as the new generation of electric power systems, combining advances in computing, distributed systems and artificial intelligence to provide more features on real-time monitoring of demand and consumption of electricity, managing large-scale distributed generators, among others, from a distributed control system on the grid. This approa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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35. Desenvolvimento de modelos e algoritmos sequenciais e paralelos para o planejamento da expansão de sistemas de transmissão de energia elétrica / Development of mathematical models, sequential and parallel algorithms for transmission expansion planning
The main objective of this study is to propose a new methodology to deal with the long-term transmission system expansion planning with multiple generation dispatch scenarios problem (TEP-MDG). With the methodology proposed in this thesis we aim to build expansion plans with minimum investment cost and also capable of meeting the new demands of modern electr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
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36. SimulaÃÃo e avaliaÃÃo de um sistema de aquecimento solar de Ãgua utilizando balanÃo energÃtico / Simulation and evaluation of a system of solar water heating using energy balance
This work was developed at the State University of West of Paranà â UNIOESTE, campus de Cascavel and was aimed at developing a computer program to simulate and scale, optimally, a system of solar water heating. To determine the efficiency parameters of the system were installed three solar collectors of 1.05 m2 each, brand Pro Sol, coupled to a thermal res
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012