Singular Solutions
Mostrando 25-36 de 42 artigos, teses e dissertações.
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25. Uso de substâncias antioxidantes na resposta à radiação dos hidrocolóides carragenanas, agaranas e alginatos utilizados na indústria alimentícia / Use of antioxidants substances to protect the hidrocolloids carrageenan, agaran and alginates used in food industry when expose to radiation
Carrageenan, agaran e alginates are hydrocolloids largely employed in every kind of food products as stabilizing agent and viscosity builder. The human body does not absorb them, so they do not introduce extra calories in the diet. Irradiation is presented as an important alternative method in food preservation because do not induce temperature increase bein
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/02/2006
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26. Equações Elípticas com Potencial Singular
In this work we establish results on existence, multiplicity, uniqueness and the rate of decay at infinity of solutions of semilinear elliptic equations with a singular potential. In certain situations we show that the solutions blowup at the origin. We also discuss the behavior of the solutions with respect to the parameters appearing in the elliptic equati
Publicado em: 2006
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27. Weak solutions for the electrophoretic motion of charged particles
We introduce a weak formulation for a system of electrostatic and hydrodynamic equations modelling the electrophoretic motion of charged particles in ionized fluids. We obtain a local in time existence theorem, using the results established in [11] and properties of the solutions of the Poisson-Boltzmann equation. These properties follows from singular integ
Computational & Applied Mathematics. Publicado em: 2006
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28. Criação da matéria em cosmologias com velocidade da luz variável e eletrônico não-linear
In this work we obtain the cosmological solutions and investigate the thermodynamics of matter creation in two diferent contexts. In the first we propose a cosmological model with a time varying speed of light c. We consider two diferent time dependence of c for a at Friedmann-Robertson- Walker (FRW) universe. We write the energy conservation law arising fro
Publicado em: 2006
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29. The social construction of cure in umbandist cults: a case study in a umbanda´s "terreiro" in Ribeirão Preto - SP. / A construção social da cura em cultos umbandistas: estudo de caso em um terreiro de umbanda da cidade de Ribeirão Preto - SP
Many people seek in umbanda solutions for their health problems, situations of interpersonal interactions and financial difficulties. The "terreiros" treat them by performances of specific practices based in a particular conception of the human being and a specific world view. The process of healing is carried out on the basis of a "spiritual semeiology" an
Publicado em: 2006
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30. A mathematical method for solving mixed problems in multislab radiative transfer
In this article, we describe a mathematical method for solving both conservative and non-conservative radiative heat transfer problems defined on a multislab domain, which is irradiated from one side with a beam of radiation. We assume here that the incident beam may have a monodirectional (singular) component and a continuously distributed (regular) compone
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-12
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31. O reescrever em contexto escolar: um estudo sobre produÃÃo de textos no Ensino MÃdio
This thesis aims at describing and to interpreting clues of the process of writing in six texts - two argumentative texts, two letters to the editor and two fantastic narratives -, written in two or three versions. There are sixteen texts altogether produced by two students from the first year of secondary school in the city of Cabo de Santo Agostinho, first
Publicado em: 2004
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32. Algoritmos de integração eficientes para o método dos elementos de contorno tridimensional. / Efficient integration algorithms for the three-dimensional boundary element method.
In this work the three-dimensional elastic problem is analyzed by the boundary element method using the Kelvin fundamental solution. Two main formulations are applied. The first one uses the classical Kelvin fundamental solution and the other, hyper-singular, uses a derivative of the Kelvin fundamental solution. The boundary is discretized by flat triangular
Publicado em: 2001
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33. Formulações não-singulares do método dos elementos de contorno aplicadas a problemas bidimensionais de potencial
In this work three non-singular formulations applied to two-dimensional potential problems are presented and implemented. In these formulations quadratic, cubic and quartic isoparametric boundary elements were used. The first formulation is based on the standard BEM with the collocation point outside the domain, associated with a sub-element technique. The s
Publicado em: 2001
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34. IMPLEMENTACIÓN NUMÉRICA PARA EL ESTUDIO DE FUNDACIONES FLEXIBLES EN SUELOS ESTRATIFICADOS / NUMERICAL ANALYSIS OF FLEXIBLE FOOTINGS ON STRATIFIED SOILS / IMPLEMENTAÇÃO NUMÉRICA PARA ESTUDO DE FUNDAÇÕES FLEXÍVEIS EM SOLOS ESTRATIFICADOS
Many problems of geotechnical engineering can be solved by superposition of the fundamental singular solutions to the governing differential equations. In the dissertation, the mechanical behavior of a flexible footing is investigated, in terms of stress and settlement distributions, considered some basic fundamental solutions published in literature. These
Publicado em: 2000
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35. Benjamin—Ono-related equations and their solutions
It is shown that the Benjamin—Ono equation is one of a hierarchy of nonlinear partial differential singular integral equations. Explicit multisoliton solutions are constructed for all equations of the hierarchy.
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36. Delayed singularity formation for solutions of nonlinear partial differential equations in higher dimensions
Strict solutions u of genuinely nonlinear homogeneous hyperbolic equations in two independent variables with initial data f(x) of compact support become singular after a time interval of order ∥f∥-1. In higher dimensions solutions initially of compact support are likely to have life expectancies of orders ∥f∥-2+ε at least. This is proved for the spe