Ellipsoid
Mostrando 13-24 de 75 artigos, teses e dissertações.
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13. The percentage of resected and ischemic volume determined by a geometric model is a significant predictor of renal functional change after partial nephrectomy
ABSTRACT Purpose The percentage of parenchyma preserved plays a predominant role in predicting renal function after partial nephrectomy (PN). Currently there is no standard method to estimate preserved renal parenchyma. In this study we propose a formula of the percentage of resected and ischemic volume (PRAIV) determined by a geometric model and evaluate
Int. braz j urol.. Publicado em: 2017-02
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14. Eficiência de estimadores robustos a observações discrepantes em modelo de regressão multivariada com aplicação na análise sensorial do café / Robust estimators efficiency to outliers in multivariate regression with application in the sensory analysis of coffee
Dada a sensibilidade do método de mínimos quadrados à presença de observações discrepantes, é sabido que as estimativas de mínimos quadrados são afetadas pela presença de uma ou mais dessas observações. Frente ao exposto, esse trabalho foi realizado com o objetivo de pesquisar o efeito de observações discrepantes no ajuste de modelos de regress
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2011
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15. High-speed camera analysis of rupture of polypropylene specimens in tensile tests / Análise das imagens de ruptura de corpos de prova de polipropileno em ensaio de tração obtidas através de câmera de alta velocidade
Injection-molded isotactic polypropylene, iPP, samples present different properties variation as a function of the injection parameters. One of these properties is the rupture propagation on the material, which was studied with the use a high-speed camera adjusted to capture from 18,000 to 45,000 frames per second. The injection molding parameters modified w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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16. Análisis térmico de soldadura GTAW sobre placa de acero AISI 316L empleando el método de elementos finitos
In the present work, thermal modeling of GTAW welding on AISI 316L stainless steel plate is presented. More relevant theoretical aspects to be considered during the implementation of an analysis of this type are discussed. For the simulation a general purpose finite element analysis software has been used. A previously developed methodology for 3D nonlinear
Soldagem & Inspeção. Publicado em: 2011-09
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17. Numerical evaluation of the weldability of the low alloy ferritic steels T/P23 and T/P24
A model based on transport equations was numerically implemented by the finite volume method (FVM) in a computational code in order to simulate the influence of the heat input, base metal thickness and preheating temperature on the thermal evolution and the cooling rate during the welding of the low alloy ferritic steels T/P23 and T/P24. As a consequence, it
Materials Research. Publicado em: 01/04/2011
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18. On a possible connection between Chandler wobble and dark matter
Chandler wobble excitation and damping, one of the open problems in geophysics, is treated as a consequence in part of the interaction between Earth and a hypothetical oblate ellipsoid made of dark matter. The physical and geometrical parameters of such an ellipsoid and the interacting torque strength is calculated in such a way to reproduce the Chandler wob
Brazilian Journal of Physics. Publicado em: 2009-03
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19. Hydrothermal synthesis of well-crystallised boehmite crystals of various shapes
Aluminium monohydroxide, also known as aluminium oxyhydroxide (boehmite - AlO[OH]), is water insoluble but crystallises into microcrystals of various shapes. When, by X-ray diffraction, the microcrystals present a basal reflexion (d[020]) of 0.611 nm, the crystalline structure is referred to as "well-crystallised" boehmite. Natural and synthetic crystals of
Materials Research. Publicado em: 2009
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20. Dinâmica de vórtices pontuais sobre um elipsóide simétrico
Neste trabalho estudamos o problema dos N-vórtices em um elipsóide de revolução do ponto de vista da teoria de perturbação. O elipsóide considerado consiste em uma perturbação da esfera. Aplicando técnicas canônicas da teoria de perturbação, construímos uma sequência de transformações conformes do elipsóide no plano complexo. Usando estas t
Publicado em: 2009
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21. Trajectory planning of jumping over obstacles for hopping robot
Trajectory planning strategy is proposed to jump over an obstacle integrated three various dynamics in one-legged multi-joint hopping robot. A concept of inertia matching ellipsoid and directional manipulability are extended to optimize take-off postures. Optimized results have been used to plan hopping trajectory. Aimed at the sensitivity of motion trajecto
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-12
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22. Irregular polygon partitioning on the biaxial ellipsoid on the surface of the Lambert azimuthal equal-area projection / DIVISÃO DE POLÍGONOS IRREGULARES DO ELIPSÓIDE BIAXIAL NA SUPERFÍCIE DA PROJEÇÃO AZIMUTAL EQUIVALENTE DE LAMBERT
This dissertation supplies the methodology of the measure (area) in the Earth model adopted for Geodesy. This model is the ellipsoid of revolution, in which the system of Cartesian coordinates, the curvilinear coordinate system and the polar coordinate system are described. The coordinate nature in the development of the surface measure calculation is discus
Publicado em: 2007
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23. Three new species of Isospora Schneider, 1881 (Apicomplexa: Eimeriidae) from the lesser seed-finch, Oryzoborus angolensis (Passeriformes: Emberizidae) from Brazil
Three new coccidian (Apicomplexa: Eimeriidae) species are reported from the lesser seed-finch, Oryzoborus angolensis from Brazil. Sporulated oocysts of Isospora curio n. sp. are spherical to subspherical; 24.6 × 23.6 (22-26 × 22-25) mum, shape-index (SI, length/width) of 1.04 (1.00-1.15). Oocyst wall is bilayerd, ~ 1.5 mum thick, smooth and colourless. Mic
Memórias do Instituto Oswaldo Cruz. Publicado em: 2006-08
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24. Optical properties of ellipsoidal CdSe quantum dots
The energy spectrum and optical absorption of confined carriers in ellipsoidal CdSe quantum dots are calculated. Our model relies on the effective mass approximation and Fermi's golden rule for the electronic structure and optical properties, respectively. We demonstrate that the electronic structure and the interband optical absorption are highly dependent
Brazilian Journal of Physics. Publicado em: 2006-06