28 resultados para Axial Symmetry
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We survey results about exact cylindrically symmetric models of gravitational collapse in General Relativity. We focus on models which result from the matching of two spacetimes having collapsing interiors which develop trapped surfaces and vacuum exteriors containing gravitational waves. We collect some theorems from the literature which help to decide a priori about eventual spacetime matchings. We revise, in more detail, some toy models which include some of the main mathematical and physical issues that arise in this context, and compute the gravitational energy flux through the matching boundary of a particular collapsing region. Along the way, we point out several interesting open problems.
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Dissertação de mestrado integrado em Biomedical Engineering Biomaterials, Biomechanics and Rehabilitation
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Dissertação de mestrado integrado em Engenharia Eletrónica Industrial e Computadores
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Dissertação de mestrado em Optometria Avançada
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Dissertação de mestrado em Optometria Avançada
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In this paper we consider the approximate computation of isospectral flows based on finite integration methods( FIM) with radial basis functions( RBF) interpolation,a new algorithm is developed. Our method ensures the symmetry of the solutions. Numerical experiments demonstrate that the solutions have higher accuracy by our algorithm than by the second order Runge- Kutta( RK2) method.
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Dissertação de mestrado integrado em Engenharia Mecânica
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Tese de Doutoramento em Psicologia Clínica / Psicologia
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Dissertação de mestrado integrado em Engenharia Civil
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Tese de Doutoramento em Engenharia Civil
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Dissertação de mestrado integrado em Engenharia Civil
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"Available online 21 March 2016"
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Tese de Doutoramento em Engenharia Mecânica.