Information Flux
Mostrando 13-24 de 72 artigos, teses e dissertações.
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13. ESTIMATIVA DE PARÂMETROS HIDRODINÂMICOS DE AQUÍFEROS EM ÁREAS DE EMBASAMENTO ATRAVÉS DE MÉTODOS INDIRETOS / ESTIMATIVA DE PARÂMETROS HIDRODINÂMICOS DE AQUÍFEROS EM ÁREAS DE EMBASAMENTO ATRAVÉS DE MÉTODOS INDIRETOS
The recession represents the period when the rivers flow is maintained predominately by subterranean water return, so establishing the base flux. In hydrographic basins, the recession coefficient (or of drain) can be determined in an indirect manner by several graph methods using series of hydrologic data. From this coefficient is possible to calculate other
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/12/2009
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14. ANÁLISE, MODELAGEM E VALIDAÇÃO EXPERIMENTAL DE UMA METODOLOGIA PARA O PROJETO DO INDUTOR EM CONVERSORES BOOST PFC / ANALYSIS, MODELING AND EXPERIMENTAL VALIDATION OF A DESIGN METHODOLOGY FOR THE INDUCTOR IN PFC BOOST CONVERTERS
This work presents the development of a methodology for design of inductor in singlephase PFC boost converters operating in CCM mode in agreement with international standards IEC 61000-3-2 and CISPR 22. Such converters are used in front-end modules of information technology equipment. This methodology is based on the investigation of the relationship among m
Publicado em: 2009
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15. Study of the Neutrinos Angra Project detector s energy resolution for measurement of the nuclear fuel composition / Estudo da resolução em energia do detector de neutrinos do Projeto ANGRA para mediadas de composição do combustivel nuclear
Nuclear reactors are an abundant source of anti-neutrinos, whose spectrum is determined by the hera decay of radioactive isotopes in the nuclear fuel. As the fuel is consumed, their isotopic composition is altered, with direct consequences on the spectrum of anti-neutrlnos. Thus, detection of anti-neutrinos can be applied in monitoring the isotopic compositi
Publicado em: 2009
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16. Bird movement patterns in a fragmented landscape and their effects to functional connectivity: an hierarchical approach / Padrões de movimentação de uma espécie de ave em paisagens fragmentadas e seus efeitos para a conectividade funcional: uma abordagem hierárquica
Habitat fragmentation is one of the major human impacts on terrestrial ecosystems. This process highly affects the species movement pattern, implying in considerable alterations on the connectivity between the remaining habitat patches. Consequently, it interferes in the spatial distribution and in the population dynamics of species. In this dissertation, so
Publicado em: 2009
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17. Multicamadas magnéticas de telureto de európio e semicondutores iv-vi crescidas por epitaxia de feixe molecular / Magnetic multilayers of europium telluride and IV-VI semiconductors grown by molecular beam epitaxy
In this work, thin EuTe films and EuTe/PbTe(SnTe) superlattices were grown, and their structural and magnetic properties were characterized. The molecular beam epitaxial growth parameters of the samples were optimized, particularly those of the EuTe/SnTe SLs. To this goal, the growth modes of EuTe on SnTe and vice versa were investigated, and the influence o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/10/2008
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18. A Literatura comparada como heterotopologia: uma perspectiva Foucaultiana para Os sertões e O coração das trevas / Comparative literature as heterotopology: a Foucaultian s perspective to "Os Sertões" and Heart of Darkness
In Of Other Spaces (1967), Michel Foucault observes that since the nineteenth century the humanities have used excessively historical methods in their studies. According to aforementioned thinker, our present times would be better understood by the human sciences by means of a spatial perspective, because we live in an epoch of real time information flux, in
Publicado em: 2008
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19. Treinamento de redes neurais artificiais baseado em sistemas de estrutura variável com taxa de aprendizado adaptativa
This work presents new algorithms for training multilayer perceptron artificial neural networks based on stability properties of sliding mode variable structure systems. The main feature of the proposed algorithms is the adaptability of the gain (learning rate), which is obtained from each update step of the network weights, without the use of heuristics met
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/03/2007
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20. Low molecular weight lignosulfonates recovery by nanofiltration / Estudo da recuperação de lignossulfonatos de baixa massa molar por nanofiltração
Membrane separation processes like ultrafiltration (UF) and nanofiltration (NF) are used in the pulp and paper industry to the recovery of several species present in the wood digest waste that are interesting to other applications as lignin, sugars and specially lignosulfonates, improving the recirculation of the water in the pulping process and the reductio
Publicado em: 2007
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21. Investigation of gravity wave momentum fluxes in the upper atmosphere derived from airlow / Investigação do fluxo de momento das ondas de gravidade na alta atmosfera através da aeroluminescência
In this study, momentum fluxes due to gravity wave propagation into the MLT region was calculated by using airglow image data and theoretical modeling. Airglow O(1S) 557,7, O2(0-1,b) and OH NIR images were obtained from Cachoeira Paulista (22,7°S; 45,0°W) and São João do Cariri (7,4°S; 36,6°W) and processed for estimation of gravity wave intrinsic para
Publicado em: 2007
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22. Determination of operation in office rooms with underfloor air distribution system. / Determinação de parâmetros de operação de sistema de distribuição de ar frio pelo piso em ambientes de escritórios.
ABE, V.C. Determination of operation parameters of rooms with underfloor air distribution system. 2007. 132 p. Dissertation (Master Course) - Departamento de Engenharia de Construção Civil da Escola Politécnica da Universidade de São Paulo, São Paulo, 2007. Nowadays, one of the main requirements of an office room to fully attend the use and occupation n
Publicado em: 2007
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23. Construção, uso e disseminação da informação em grupos de pesquisa por meio de ambientes virtuais de colaboração.
The computers and the Internet in the universities and organisms of research have been shown as an element with potential for the dynamization of the construction, use and dissemination of the information for the collaborative work of the research groups. However, it is not evident the use of specialized information systems for support this modality of work.
Publicado em: 2006
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24. DEPOSIÇÃO DE PARAFINA EM ESCOAMENTO LAMINAR NA PRESENÇA DE CRISTAIS EM SUSPENSÃO / WAX DEPOSITION IN LAMINAR FLOW WITH SUSPENDED CRYSTALS
Offshore crude oil production is steadily growing. Oil transport in these cold environments (deep water) causes the precipitation of the heavy organic crude oil components like waxes. Wax deposition at the inner wall of pipelines is a serious problem in crude oil transportation causing the partial or total plugging of pipelines, increase in pumping energy an
Publicado em: 2006