Now showing items 31-40 of 55
HÉLICES, CURVAS DE BERTRAND E SUPERFÍCIES REGRADAS
(Universidade Federal de Santa Maria, 2012-02-27)
This work is designed to study helices and Bertrand curves. A circular helix is characterized by having constant curvature k 6= 0 and constant torsion t . If the ratio t k is constant, the curve is called generalized helix. ...
EQUAÇÕES DIFERENCIAIS LINEARES SEM SOLUÇÃO
(Universidade Federal de Santa Maria, 2014-02-27)
In this work we present the proof of a result due to Lars Hörmander which establishes a necessary condition for a linear operator with variable coefficients is globally resolvable.
RESOLUBILIDADE GLOBAL DE OPERADORES LINEARES COM COEFICIENTES CONSTANTES
(Universidade Federal de Santa Maria, 2013-07-15)
In this dissertation we present a proof of a Bernard Malgrange theorem, which establishes a necessary and sufficient condition for the global solvability of a linear operator with constant coefficients.
MODELOS DE REDES DE MAPAS ACOPLADOS PARA INTERAÇÕES HERBÍVORO-PREDADOR
(Universidade Federal de Santa Maria, 2013-04-12)
In this work we propose a discrete predator-prey model with the purpose of analyzing the spatio-temporal dynamics of herbivorous and their predators. For that, we explicitly consider the dispersion of both species through ...
Teoremas de Maschke
(Universidade Federal de Santa Maria, 2013-05-09)
In representation theory, having a representation of a group G is equivalent to having a kG-module. Since |G-modules which are sums of irreducible kG-modules form a very important class in the theory of modules, to know ...
ESTUDO DAS VIBRAÇÕES TRANSVERSAIS EM UM SISTEMA VISCOELÁSTICO ACOPLADO DE DUAS CORDAS
(Universidade Federal de Santa Maria, 2013-11-22)
In this work, it is developed a study of the transverse vibrations of a system composed by two parallel strings of equal length, coupled by a viscoelastic element. The frequencies and mode shapes are obtained using modal ...
DINÂMICA DE UM SISTEMA PRESA-PREDADOR COM PREDADOR INFECTADO POR UMA DOENÇA
(Universidade Federal de Santa Maria, 2013-05-10)
The aim of this work is to study the temporal and spatiotemporal evolution of a threedimensional system that describes a predator-prey dynamics, where the predator population can develop an infectious disease. Thus, the ...
USO DA BASE DINÂMICA EM UM SISTEMA DE DUAS VIGAS ACOPLADAS
(Universidade Federal de Santa Maria, 2013-08-26)
This work researches on free and forced vibrations of a double beam coupled system. The system is regarded as two Euler-Bernoulli beams which are parallel, have the same length, are simply supported and are connected through ...
TAXIA E AGREGAÇÃO NÃO LOCAL EM UM SISTEMA PLANTA HERBÍVORO
(Universidade Federal de Santa Maria, 2013-04-11)
The dispersal of herbivorous insects in large plantations must be modelled by taking into account many behavioral aspects of the individual movement. The insect ability to search for (and find) better plant quality are of ...
VÉRTICES, CURVA FOCAL E SUPERFÍCIE FOCAL DE CURVAS NO ESPAÇO
(Universidade Federal de Santa Maria, 2013-03-19)
The focal surface of a curve γ in the Euclidean 3-space is defined as the envelope of the normal planes of γ. The focal surface of γ is singular along a curve Cγ, called the focal curve or generalized evolute. This curve ...