Spatial Equilibrium
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. Estudo por espectroscopia micro-Raman dos mecanismos de separação de fase em vidros fosfatos de metais de transição
Glass-ceramics are prepared by controlled separation of crystal phases in glasses, leading to uniform and dense grain structures. On the other hand, chemical leaching of soluble crystal phases yields porous glass-ceramics with important applications. Here, glass/ceramic interfaces of niobo-, vanado- and titano-phosphate glasses were studied by micro-Raman sp
Química Nova. Publicado em: 2009
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14. Instabilidade financeira no espaço: uma abordagem monetária da dinâmica econômica regional
This essay takes money as an active factor in the process of regional allocation of productive resources. Nevertheless, it develops an alternative approach to address the problem of determination of liquidity preference over the space. To do this, the introduction of a temporal dimension into the centre-periphery analysis is proposed by arguing that the beha
Publicado em: 2009
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15. GEOLOGICAL AND GEOMECHANICS MODELLING 3D AND STABILITY ANALYSES 2D OF THE SLOPES OF THE MORRO DA MINA MINE, CONSELHEIRO LAFAIETE, MG, BRAZIL / MODELAGEM GEOLÓGICA E GEOMECÂNICA 3D E ANÁLISES DE ESTABILIDADE 2D DOS TALUDES DA MINA DE MORRO DA MINA, CONSELHEIRO LAFAIETE, MG, BRASIL
This work presents a methodology to develop geological and geomechanic models (3D) and to carry out stability analyses (2D) of rock slopes of open pit mine, based on data of Morro da Mina mine, provided by the mining company VALE. The methodology is divided in two stages: modelling and stability analyses. For the modelling, the software Petrel 2004, which al
Publicado em: 2008
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16. Aplicação de peneiras moleculares contendo cátions orgânicos em catálise básica
This thesis was aimed at studying novel basic catalysts based on molecular sieves containing alkylammonium cations. The studied molecular sieves were faujasite zeolites (FAU) and mesoporous silicate (like MCM-41). The following parameters were evaluated: (1) different alkylammonium cations, (2) different amount of alkylammonium cations and (3) application of
Publicado em: 2008
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17. A spatial price equilibrium model in the oligopolistic market for oil derivatives: an application to the brazilian scenario
Este artigo apresenta um modelo de equilíbrio espacial de preços em um mercado oligopolizado de derivados de petróleo. Até o ano de 1997, o mercado brasileiro era caracterizado pelo monopólio estatal da Petrobrás, a qual permaneceu, até 2001, como a única empresa autorizada a importar derivados de petróleo. Com vários agentes operando no mercado, o
Pesquisa Operacional. Publicado em: 2007
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18. CONTRIBUIÇÃO PARA A ANÁLISE DA COMPETITIVIDADE DA SOJA EM GRÃOS: UMA APLICAÇÃO DO MODELO DE EQUILÍBRIO ESPACIAL AO ESTADO DE TOCANTINS / CONTRIBUTION FOR THE ANALYSIS OF THE COMPETITIVITY OF THE SOY BEANS IN GRAINS: AN APPLICATION OF THE SPATIAL EQUILIBRIUM MODEL TO THE STATE OF TOCANTINS
O sistema logístico da soja brasileira em grãos é um elemento importante na cadeia produtiva, pois a maior parte dos custos desta oleaginosa é dada pelos custos de transportes e os custos de armazenagem. Nesse sentido, a otimização desse segmento é essencial para aumentar a competitividade da soja brasileira no mercado internacional. Nesta tese, prop�
Publicado em: 2007
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19. Analysis of thermal non-equilibrium for turbulent transport in porous media.
The literature has documented proposals for macroscopic energy equation modeling for porous media considering the local thermal equilibrium hypothesis and laminar flow. In addition, a two-energy equation model has been proposed for conduction and laminar convection in packed beds. With the aim of contributing to new developments, this work treats turbulent h
Publicado em: 2006
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20. The Brazilian agroexport sector and the foreign direct investment in the MERCOSUL/UE integration context / O setor agroexportador brasileiro e os investimentos diretos externos no contexto da integração MERCOSUL/UE
Having the constitution perspective of MERCOSUL/UE agreement with the possibility of the business strength between the blocks, we analized by the creation esteem and the business detour to the Brazilian agroexport sector the possible gains in four alternative sceneries of integration. It was used a model of partial balance, which the results to the four leve
Publicado em: 2006
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21. "Tomografia computadorizada, atenuação de raios gama e análise micromorfológica na avaliação de alterações na estrutura e retenção de água pelo solo" / Computed tomography, gamma-ray attenuation, and micromorphologic analysis to evaluate changes on soil structure and water retention
Soil structure is related to the arrangement of soil particles, aggregates, and pores, which makes part of this porous media. The influence of structure on soil physical phenomena ranges from macro to microscope scale. Structure changes in microscope scale are important because affect the soil particle arrangement and, consequently, the pores distribution. S
Publicado em: 2006
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22. Sistemas hidrogrÃficos complexos: dimensÃes sÃcio- ambientais da bacia hidrogrÃfoica do rio TejipiÃ
Within the last decades researches considering river basins not only as entities of spatial planning but at the same time as sensitive systems, at which human actions have deep impacts on the natural systems, for example the drainage systems, have increased. Within urban centres the natural and/or social systems are configured in a complex way being nonlinea
Publicado em: 2005
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23. Spatial analysis of the economic interactions among the Brazilian states / Análise espacial das interações econômicas entre os estados brasileiros
The principal aim of this thesis is to analize the economic interactions among the Brazilian states. The economic interactions in this work will be treated as trade among the Brazilian states and trade between the Brazilian states and the rest of the world. In order to reach this objective a computable general equilibrium model was specified (B-MARIA27-IT).
Publicado em: 2004
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24. Uso e diversidade genética em populações naturais de biriba (Eschweilera ovata [Cambess.] Miers): subsídios ao manejo e conservação da espécie. / Use and diversity genetic in natual populations of biriba (eschweilera ovata [cambess.] miers): subsidies to management and conservation of specie.
The exploitation of non-timber resources from tropical forest has been an alternative income to local human communities. Among the tree species which are exploited in the Atlantic forest, the biriba Eschweilera ovata (Cambess.) Miers has been used to manufacture the arc of berimbau. The genetic conservation and the sustainable management of E.
Publicado em: 2004