Now showing items 11-20 of 55
Pontos Helicoidais e Vértices de Darboux de Curvas no Espaço Euclidiano
(Universidade Federal de Santa Maria, 2010-03-11)
The main aim of this work is a study about twistings points and Darboux vertices of n-space curves. We define the concept of twisting of a n-space curve as flattening point of its tangent indicatrix and show that is ...
MÚLTIPLAS ESCALAS EM INTERAÇÕES PRESA-PREDADOR
(Universidade Federal de Santa Maria, 2010-03-05)
The main purpose of this dissertation was to analyze the occurrence of two time scales in predator-prey systems. Initially, we proposed two discrete models without spatial structure. The first model considers fast vital ...
O TEOREMA DE CAUCHY NA MECÂNICA DOS FLUIDOS
(Universidade Federal de Santa Maria, 2010-12-21)
The present work shows Cauchy's Theorem on its classical form, and it has the objective of weakening their statements, and provides aplications in continuum mechanics. The metodology used here is the axiomatic, that is, a ...
Autofunções e Frequências de Vibração do Modelo Euler-Bernoulli para Vigas Não-Clássicas
(Universidade Federal de Santa Maria, 2011-07-18)
This paper presents a methodology for determining eigenfunctions and frequencies of the Euler-Bernoulli model for elastic beams that can include damping and devices located at intermediate or end points of the beam. The ...
EQUAÇÕES DE NAVIER-STOKES: ASPECTOS FÍSICOS E SOLUÇÃO FRACA EM ESPAÇOS DE SOBOLEV
(Universidade Federal de Santa Maria, 2008-12-10)
In this work, based on the Law of conservation of mass and the Newton s second Law, we deducted the equations of Navier-Stokes for the uncompressing fluids. Then we have developed in a detailed way the varying form of ...
S-Anéis, Anel Centralizador e Grupos com Loops Transversais
(Universidade Federal de Santa Maria, 2009-01-20)
In this work, we present the concepts of loop transversal, centralizer ring and S-ring over a permutation group. The connection between these three subjects was obtained by Kenneth W. Johnson, where he translated the results ...
Álgebras de Hopf trançadas na categoria dos módulos de Yetter-Drinfeld
(Universidade Federal de Santa Maria, 2018-06-25)
Some Hopf algebras braided in the Yetter-Drinfeld modules category have an important role in the classification of pointed Hopf algebras. Our main goal in this work will be to characterize braided Hopf algebras in ...
Modelos de autômatos celulares para febre amarela silvestre em bugios
(Universidade Federal de Santa Maria, 2018-02-28)
In this work, discrete mathematical models are proposed to analyze the dynamics of a population of howler monkeys stricken with periodic outbreaks of yellow fever. Using the cellular automata framework, the models describe ...
Autofuncões do modelo de Timoshenko em um sistema de duas vigas acopladas elasticamente
(Universidade Federal de Santa Maria, 2016-11-23)
This study aims to determine the eigenfunctions or vibration modes of a system composed of two beams coupled by an elastic layer and modeled mathematically by Timoshenko theory for beams. The study is conducted through ...
Classificação de singularidades semi- hiperbólicas e nilpotentes de campos planares analíticos
(Universidade Federal de Santa Maria, 2017-07-12)
In this work, we present some results of Qualitative Theory of Planar Ordinary Differential Equations employed in the investigation of the behavior of solutions in the neighborhood of semi-hyperbolic and nilpotent singularities.