Shadowing
Mostrando 25-36 de 127 artigos, teses e dissertações.
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25. Análise e simulação de um sistema de equações químicas do tipo difusão-reação
Neste trabalho estudamos um sistema de equações diferenciais parabólicas que modelam um processo de difusão-reação em duas dimensões da mistura molecular e reação química irreverssível de um só passo entre duas espécies químicas A e B para formar um produto P. Apresentamos resultados analíticos e computacionais relacionados à existência e un
Publicado em: 2007
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26. The solar envelope and the right to the sun / O envelope solar e o direito ao sol
This work presents a study that investigates forms of regulation of access to the sun and its qualification, in the processes of urban planning and project of the building. Given the great availability of sun and natural light in the country, this regulation becomes recommendable. With the spread of the knowledge about the solar envelope and the introduction
Publicado em: 2007
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27. Semiflows on flag bundles and their shadowing semigroups / Semifluxos em fibrados flag e seus semigrupos de sombreamento
A presente tese fornece uma abordagem que estabelece conexões entre dinâmica e teoria de semigrupos. Esta abordagem, denominada de teoria de semigrupos de sombreamento, é aplicada com sucesso no estudo de semifluxos de endomorfismos de uma classe bastante ampla de fibrados, que inclui a classe dos fibrados projetivos. Os semifluxos de endomorfismos de um
Publicado em: 2006
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28. Efeitos topográficos em espectros RBS / Topographic effects in RBS spectra
A medida da rugosidade de uma superfície costuma produzir resultados que dependem da metodologia empregada. A microscopia eletrônica de varredura, SEM, a microscopia de força atômica, AFM e a perfilometria são algumas das técnicas costumeiramente empregadas na caracterização de superfícies rugosas. Esse trabalho explora a e desenvolve o uso da espec
Publicado em: 2006
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29. Sucrose metabolism in coffee fruit / Metabolismo da sacarose em frutos de cafe
Since coffee culture productivity is straightly connected to three basic production factors: climate, genetics and physiology, herein some aspects of the carbohydrates metabolism involved in the process of coffee grains filling through its development were analyzed. It is known the carbohydrates composition, mainly the polysaccharides composition of the coff
Publicado em: 2006
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30. Estudo morfológico das alterações vitreorretinianas em pacientes com retinocoroidite ativa supostamente causada pelo Toxoplasma Gondii: estudo retrospectivo pela Tomografia de Coerência Óptica (OCT 3).
Orefice, JL. Morphological study of vitreoretinal alterations in patients with active retinochoroiditis possibly caused by the Toxoplasma gondii . Prospective study by the optical coherence tomography (OCT 3) 2006. Thesis (Doctorate in Ophthalmology) - Medical School, Federal University of Minas Gerais, Belo Horizonte. Introduction: The ocular toxoplasmosis
Publicado em: 2006
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31. Mythical Judicial Rulings of Higher Brazilian Courts / O mito da prestaÃÃo jurisdicional pelos tribunais superiores brasileiros
âMythsâ can play contradictory historical/sociological roles in society, justifying, shadowing or hiding reality. Scientific knowledge requires âmethodâ. From Plato/Aristotle man brought Logic/Rhetoric, changed them, made additions and experiments with Bacon, Locke and Hume, reached Descartesârationalism, Hegelâs Dialectics, Exegesis School through Kan
Publicado em: 2004
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32. Estudo de filmes finos de TiOx crescidos por sputtering para aplicações fotoeletroquimicas
The morphological, structural and electrical properties of rf-sputter deposited TiOx films were studied as a function o the substrate temperature (TS) and the oxygen flow rate (FO2). The possibility of applying the TiOx films as electrodes for phenol detection in water through photocurrent measurements in a photoelectrochemical cell was also explored.The x v
Publicado em: 2004
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33. A dynamic method to PEBS detection and the Shadowing Method to calculate the controlling unstable equilibrium point in transient stability studies / Método dinâmico para detecção do PEBS e "Shadowing Method" para cálculo do ponto de equilíbrio de controle em estudos de estabilidade transitória
In transient stability assessment, the nonlinearities of the systems and the dimension of the problem contribute to the complexity of the analysis in power systems. The classical numerical solution to obtain the critical clearing time (cct) has been used, but it is time-consuming and not adequate for real-time applications. The direct methods have the adequa
Publicado em: 2003
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34. Homogeneous Gaussian Profile P+-Type Emitters: Updated Parameters and Metal-Grid Optimization
P+-type emitters were optimized keeping the base parameters constant. Updated internal parameters were considered. The surface recombination velocity was considered variable with the surface doping level. Passivated homogeneous emitters were found to have low emitter recombination density and high collection efficiency. A complete structure p+nn+ was analyze
Materials Research. Publicado em: 2002-10
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35. High Density QCD
The dynamics of high partonic density QCD is presented considering, in the double logarithm approximation, the parton recombination mechanism built in the AGL formalism, developed including unitarity corrections for the nucleon as well for nucleus. It is shown that these corrections are under theoretical control. The resulting non linear evolution equation i
Brazilian Journal of Physics. Publicado em: 2001-06
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36. Análise teórica de emissores homogêneos (n+) e duplamente difundidos (n+n++) em células solares de silício: implementações ao processo de fabricação. / Theoretical analysis of homogeneous (n+) and double diffused (n+ n++) emitters of silicon solar cells implementations to the fabrication process.
Searching for the improvement of n+pp+ solar cell efficiencies, a theoretical model was developed in order to optimize the emitter parameters and several technological processes were implemented in the fabrication of these devices. Thus, a code considering the characteristics of the different regions n+ emitter, base region and p+ emitter were developed. The
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/07/1998