Local Coefficients
Mostrando 13-24 de 97 artigos, teses e dissertações.
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13. Wall effects on the cross-buoyancy around a square cylinder in the steady regime
The effects of blockage ratio on the combined free and forced convection from a long heated square obstacle confined in a horizontal channel are investigated in this work. The numerical computations are performed in the steady regime for Reynolds number = 1 - 30, Richardson number = 0 - 1 for blockage ratios of 0.125 and 0.25 for the fixed Prandtl number of
Brazilian Journal of Chemical Engineering. Publicado em: 2012-06
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14. The relationship between genetic variability and the susceptibility of Biomphalaria alexandrina snails to Schistosoma mansoni infection
In the present study, Biomphalaria snails collected from five Egyptian governorates (Giza, Fayoum, Kafr El-Sheikh, Ismailia and Damietta), as well as reference control Biomphalaria alexandrina snails from the Schistosome Biological Supply Center (SBSC) (Theodor Bilharz Research Institute, Egypt), were subjected to species-specific polymerase chain reaction (
Memórias do Instituto Oswaldo Cruz. Publicado em: 2012-05
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15. Processamento de sinais de descargas parciais em tempo real com base em wavelets e seleção de coeficientes adaptativa espacialmente
On-line partial discharge (PD) analysis is a highly pursued feature due to the economy related to scheduled shutdowns, disassembling and transport. Nevertheless, on-site PD measurements are frequently limited by interferences found in high-voltage facilities, a situation that imposes the continued development of PD signal processing methods. In the last year
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/11/2011
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16. Analysis of digital surface models generated from images of PRISM/ ALOS sensor / Análise de modelos digitais de superfície gerados a partir de imagens do sensor PRISM/ALOS
O objetivo deste trabalho é a análise da qualidade de Modelos Digitais de Superfície (MDSs) gerados a partir de pares estereoscópicos de imagens do sensor PRISM/ALOS, considerando-se aspectos quanto a diferentes abordagens de correção geométrica, estratégias de correlação de imagens, espaçamento da grade e acurácia posicional. O padrão de acurá
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/10/2011
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17. Avaliação do desempenho de pavimentos permeáveis / Experimental analysis of permeable pavements
This study aimed to evaluate the experimental performance of three types of permeable pavements constructed in three different structural conditions in order to control runoff in urbanized areas of the city of Goiania, Goias, adapting to the legal requirements and using local manufactured materials. It was evaluated nine experimental plots of 3.2 m as the fo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/09/2011
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18. A hybrid technique for residual stress analysis through stress function fitting
This work presents a hybrid experimental theoretical technique for residual stresses analysis of mechanical components. It was used the blind hole technique along with the Electronic Speckle Pattern Interferometry (ESPI) method and Airy stress functions for the determination of the principal stress components. Displacement information is fitted in order to e
Latin American Journal of Solids and Structures. Publicado em: 2011-09
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19. Optimized feed planning for a grazing horse production systems.
The objective of this study was to develop an economically optimal plan for pasture production and supplementary feeding of horses. The plan was based on the optimization of a multiperiodic linear programming model with the objective of minimizing overall feeding costs, subject to the nutritional constraints of each horse category. The model encompasses a pe
Revista Brasileira de Zootecnia. Publicado em: 2011
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20. Estudo numérico da aplicação do método dos elementos finitos de Galerkin e dos mínimos quadrados na solução da equação da convecção-difusão-reação tridimensional / Numerical study of the application of Galerkin and least squares finite element methods in the solution of the tridimentional convection-diffusion-reaction equation
This paper the application of the Finite Element Method in variants Galerkin and Least Squares with auxiliary equations for the numerical solution of partial differential equation that models the convection-diffusion-reaction defined over a three-dimensional domain in steady state. In the spatial discretization were used hexahedrons elements with eight (line
Publicado em: 2011
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21. Necessidade hídrica no cultivo de feijão, trigo, milho e arroz sob irrigação no bioma Cerrado.
RESUMO: Este trabalho objetivou determinar a necessidade hídrica e os coeficientes de cultura em feijão, trigo, milho e arroz irrigados por aspersão do tipo pivô-central, visando ao manejo da água com tanque classe A. O feijão e o trigo foram cultivados na época da seca com plena irrigação enquanto o milho e o arroz, no período das chuvas, com supl
Planaltina. Publicado em: 2011
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22. Os climas do Rio Grande do Sul : variabilidade, tendências e tipologia
This thesis focuses on the analytical study of the climate in the state of Rio Grande do Sul (Brazil), addressing the variability (spatial-temporal) of climatic-meteorological elements and the approach of their trends based on the climate classification in the area. In association with this analysis is the recognition of climate variability in regional scale
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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23. Vortex dynamics equation in type-II superconductors in a temperature gradient
In this work we determined a vortex dynamics equation in a temperature gradient in the frame of the time dependent Ginzburg-Landau equation. In this sense, we derived a local solvability condition, which governs the vortex dynamics. Also, we calculated the explicit form for the force coefficients, which are the keys for the understanding of the balance equat
Brazilian Journal of Physics. Publicado em: 2010-12
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24. Nitrogen charge temperature prediction in a gas lift valve
The operation of a class of retrievable gas-lift valves (GLV) is controlled by the axial movement of a bellows. One force acting on the bellows is due to the pressure exerted by the nitrogen gas contained in the GLV dome. It depends on the nitrogen temperature, which is influenced by both the production fluid and the injection gas temperatures in the well. T
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-03