Curvature Ellipse
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Stress concentration around perforations produced by corrosion in steel storage tanks
This paper presents numerical results of stress concentration factors for plates perforated by corrosion. Evidence from 25 plates with corrosion perforation considered show that typical shapes may be characterized as a deviation from an ellipse or from a circle. In order to model typical perforations created by this type of corrosion, holes with non-circular
Lat. Am. j. solids struct.. Publicado em: 2014
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2. Semiumbilicidade e umbilicidade em superfícies imersas em Rn, n ≥ 4 / Semiumbilicity and umbilicity in surfaces immersed in Rn, n ≥ 4
Neste trabalho introduzimos o conceito de elipse de curvatura em um ponto de uma superfície imersa em Rn, n ≥ 4 com o objetivo de estudar as relações entre pontos semiumbílicos (pontos onde a elipse de curvatura se degenera em um segmento de reta), a existência de direções normais de umbilicidade à superfície e superfícies hiperesféricas. Pa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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3. 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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4. Effects of varying curvature and width on the electronic states of GaAs quantum rings
Stationary states of an electron in thin GaAs elliptical quantum rings are calculated within the effective-mass approximation. The width of the ring varies smoothly along the centerline, which is an ellipse. The solutions of the Schrödinger equation with Dirichlet boundary conditions are approximated by a product of longitudinal and transversal wave functio
Brazilian Journal of Physics. Publicado em: 2006-06