Transport Theory
Mostrando 25-36 de 171 artigos, teses e dissertações.
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25. An explicit formulation for the inverse transport problem using only external detectors: Part I: computational modelling
In the present work the inverse problem of identification of radiative properties, the total extinction and scattering coefficients, is analyzed and explicitly formulated based in an elementary semi-group theory. The Chandrasekhar discrete ordinates finite dimensional approximation of the angular variables is used for the direct problem representation with t
Computational & Applied Mathematics. Publicado em: 2010
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26. Fundamentos para a pesquisa em transporte : reflexões filosóficas e contribuições da ontologia de Bunge
Research in the field of Transportation seems to have reached a degenerative problemshift, likewise whats been happening in some other fields of scientific investigation. The too few theoretical advances observed since the 70s indicate the necessity of redirecting our attention to the foundations, fundamentals and theories of the field of Transportation rese
Publicado em: 2010
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27. Espalhamento de ondas eletromagnéticas por esferas e cilindros magnéticos: confinamento e transporte de ondas no limite de pequenas partículas e independência da energia armazenada com relação à forma do centro espalhador / Electromagnetic wave scattering by magnetic spheres and cylinders: waves confinement and transport in the small particle limit and independence of the stored energy with respect to the shape of the scatterer
O espalhamento eletromagnético por uma esfera com propriedades ópticas e raio arbitrários, conhecido como espalhamento de Lorenz-Mie, ou por um cilindro circular infinito, pode ser resolvido analiticamente e é comumente tratado dentro da abordagem de espalhadores dielétricos. Na região óptica, tanto meio circundante quanto partícula espalhadora possu
Publicado em: 2010
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28. Implantação iônica de baixa energia em polímero para desenvolvimento de camadas compósitas nanoestruturadas condutoras litografáveis. / Low energy ion implantation into polymers to develop conductive composite layers for lithography.
Electronics using polymers instead of silicon is a recent research area with promising economic perspectives. Polymer with metallic particles composites presents interesting electrical, magnetic and optical properties and they have been produced by a broad variety of techniques. Metal ion implantation using plasma is one of the used methods to obtain conduct
Publicado em: 2010
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29. Histórias de fins, histórias sem fins...: um estudo sobre rituais no processo de luto
The purpose of this thesis was to understand the role of rituals in grieving situations caused by disasters. Given the Attachment Theory and the subsequent contributions to this approach, increased by studies on the meaning of death and of rituals performed in the grieving process, we conducted a qualitative study of people who suffered losses in a crash: th
Publicado em: 2010
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30. Non-universal interspecific allometric scaling of metabolism
We extend a previously theory for the interspecific allometric scaling developed in a d+1-dimensional space of metabolic states. The time, which is characteristic of all biological processes, is included as an extra dimension to d biological lengths. The different metabolic rates, such as basal (BMR) and maximum (MMR), are described by supposing that the bio
Brazilian Journal of Physics. Publicado em: 2009-12
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31. Método para a avaliação do ganho empregado pelo piloto em ensaios de PIO / Method to evaluate pilot gain in PIO flight test
A method is proposed to verify losed-loop adequate flight test piloting gain in PIO aircraft certification. The synthetic tracking task PIO flight test is used. The theory is based on the entropy concept from information theory and on the structural pilot model of the human pilot. The method is presented for single axis pilot tracking maneuvers and offers a
Publicado em: 2009
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32. Reconstrução intranodal da solução numérica gerada pelo método espectronodal constante para problemas Sn de autovalor em geometria retangular bidimensional / Nodal reconstruction scheme for the numerical solution generated by the constant spectral nodal method for Sn eingenvalue problem in X, Y geometry
In this dissertation the spectral nodal method SD-SGF-CN, cf. spectral diamond spectral Green s function - constant nodal, is used to determine the angular fluxes averaged along the edges of the homogenized nodes in heterogeneous domains. Using these results, we developed an algorithm for the reconstruction of the node-edge average angular fluxes within the
Publicado em: 2009
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33. Study of the influence of structural defects in the properties of carbon nanotube / Estudo da influência de defeitos estruturais nas propriedades de nanotubos de carbono
We have investigated the influence of defects on structural, electronic and mechanical properties of single-walled carbon nanotubes (SWCNT), bundles of nanotubes and multi-walled carbon nanotubes (MWCNT). All our results were obtained with the first principles theory of total energy - Density Functional theory (DFT). We have investigated the structural prope
Publicado em: 2009
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34. Analysis of Vehicle Routing via TransCAD: a Contribution to Urban Freight Distribution / Estudo de roteirização de veículos empregando o TransCAD: contribuição para a distribuição urbana de cargas
This study analyzes urban freight distribution from the wholesale distribution sector to supermarkets retail sector via TransCAD software, and the vehicle routing problem with time windows has been applied for possible delivery route optimization. TransCAD focuses on a transport system based on graph theory concepts which have been employed in this study, to
Publicado em: 2009
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35. As políticas públicas de revitalização urbana e a localização das classes sociais : o caso de Belém - PA
This research is about government urban projects for revitalization on poor áreas named alagados in Belém City (PA). The projects increase the quality of these places but have the tendency to move the population to other areas far away and like this starting more urban segregation, not desired, which is the problem here pointed. This is known in most big c
Publicado em: 2009
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36. Analysis of the social nets of incubadoras of companies located in regions of high technological density of the State of São Paulo / Análise das redes sociais de incubadoras de empresas localizadas em regiões de alta densidade tecnológica do Estado de São Paulo
To invest in the development of innovative companies has been a strategy contemporary adopted for countries in search of competitiveness increase. To stimulate the businessoriented innovation means to become the propitious environment the bloom of the creativity, the applied research and the technology transfer. Innovative companies have a narrow relation wi
Publicado em: 2009