Polyhedron
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Radioactive iodine therapy: multiple faces of the same polyhedron
ABSTRACT The incidence of differentiated thyroid carcinoma (DTC) has increased in recent decades with early stage, low risk papillary thyroid cancer (PTC) being detected and diagnosed. As a result, the psychological, financial, and clinical ramifications of overdiagnosis and excessively aggressive therapy are being increasingly recognized with many authoriti
Archives of Endocrinology and Metabolism. Publicado em: 2022
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2. Problemas de corte com sobras aproveitáveis e eliminação de simetrias / Cutting stock problems with usable leftover and symmetry breaking
In this work we study two variations of the packing problem where identical rectangular items must be packed into a polyhedron. One of the variations consists in finding the largest amount of rectangular items that can fit in a polyhedron. The other one consists in finding a minimal area polyhedron of a certain type that packs a set of rectangular identical
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/09/2012
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3. Recoloração convexa de caminhos / Convex recoloring of paths
O foco central desta tese é o desenvolvimento de algoritmos para o problema de recoloração convexa de caminhos. Neste problema, é dado um caminho cujos vértices estão coloridos arbitrariamente, e o objetivo é recolorir o menor número possível de vértices de modo a obter uma coloração convexa. Dizemos que uma coloração de um grafo é convexa se,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/11/2011
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4. Parameter estimation for LLDPE gas-phase reactor models
Product development and advanced control applications require models with good predictive capability. However, in some cases it is not possible to obtain good quality phenomenological models due to the lack of data or the presence of important unmeasured effects. The use of empirical models requires less investment in modeling, but implies the need for large
Publicado em: 2011
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5. Effect of a nuclear polyhedrosis virus on Spodoptera frugiperda (Smith) (Lepidoptera:noctuidae) larvae, its damage and yield of maize crop.
The efficiency of Baculovirus in a wettable powder formulation to control the fall armyworm Spodoptera frugiperda (Smith) was evaluated using variations of the recommended dose of 50 grams per hectare (2.5 x 1011 polyhedron inclusion bodies - PIB ha-1): 50 or 100 g ha-1 applied once, and variations of two applications at seven-day intervals, of 25+25, 25 + 5
Revista Brasileira de Milho e Sorgo. Publicado em: 2011
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6. Estrutura de vidros fosfatos ternários no sistema Pb-Al metafosfato
In this work, the Pb-Al meta-phosphate glass system (1-x) Pb(PO3)2 xAl(PO3)3 was studied, with the aim of determining the structural effects induced in the glass network by the substitution of Pb by Al. In the series of glasses encompassing the range 0 ≤ x ≤ 1 the composition meta [O/P] = 3 was maintained. In this way, the resulting phosphate net
Publicado em: 2008
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7. A construção do estado estratégico : a percepção dos atores intervenientes nas políticas públicas para a agricultura no Brasil no período 1991-2005
The present dissertation elucidates perceptions about a strategic State by intervening agents in public policies for agriculture in Brazil from 1991 through 2005. As a protagonist in agro-food supply, worldwide leader outlooked by FAO and OCDE for the next ten years, and the planet under a strong growth of its urban population, one may wonder if Brazil is aw
Publicado em: 2008
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8. Parameter estimation for LLDPE gas-phase reactor models
Product development and advanced control applications require models with good predictive capability. However, in some cases it is not possible to obtain good quality phenomenological models due to the lack of data or the presence of important unmeasured effects. The use of empirical models requires less investment in modeling, but implies the need for large
Brazilian Journal of Chemical Engineering. Publicado em: 2007-06
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9. Application of virtual reality techniques in visualizing and cutting non-convex polyhedron / Uma aplicaÃÃo das tÃcnicas de realidade virtual na visualizaÃÃo e corte de poliedros nÃo-convexos
This dissertation presents an educational software which explores Virtual Reality techniques (VR) through the development of virtual educational environments. 3D Geometry has been taken as a case study. The objective of this work is the extension of the cut for convex and non-convex polyhedron. The virtual environment and the interaction techniques have been
Publicado em: 2007
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10. Uma aplicação das técnicas de realidade virtual na visualização e corte de poliedros não-convexos / Application of virtual reality techniques in visualizing and cutting non-convex polyhedron
Esta dissertação apresenta um software educacional que explora técnicas de Realidade Virtual (RV) através do desenvolvimento de ambientes virtuais educacionais. Utiliza-se a Geometria Espacial como estudo de caso. O objetivo deste trabalho é a extensão do corte para poliedros convexos e não-convexos. O ambiente virtual e as técnicas de interação pr
Publicado em: 2007
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11. Modelo Sparkle: novos avanÃos para o estudo quÃmico-quÃntico de complexos de lantanÃdeos
Since 1994, the Sparkle Model for Lanthanide Complexes has been used for the calculation of ground state geometries of only Eu(III) complexes. In the present thesis, we evolved the Sparkle Model and advanced Sparkle/AM1 and Sparkle/PM3: new paradigms for semiempirical quantum chemical calculations on lanthanide complexes. Parameterizations for all fifteen tr
Publicado em: 2007
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12. Modeling polycrystals with regular polyhedra
Polycrystalline structure is of paramount importance to materials science and engineering. It provides an important example of a space-filling irregular network structure that also occurs in foams as well as in certain biological tissues. Therefore, seeking an accurate description of the characteristics of polycrystals is of fundamental importance. Recently,
Materials Research. Publicado em: 2006-06