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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 ...
Soluções fundamentais de operadores lineares de coeficientes constantes
(Universidade Federal de Santa Maria, 2012-03-09)
In this thesis we present a proof of the Malgrange-Ehrenpreis theorem, which states that every operator with constant coefficients non identically zero has a fundamental solution.
Um modelo discreto para interações planta-herbívoro-predador
(Universidade Federal de Santa Maria, 2015-06-10)
The population dispersion is an important process to be considered when we wish
analyze the interactions between populations. Taking into account the range and the
way in which the movement takes place makes the model ...
Existência e multiplicidade de soluções positivas para uma classe de problemas elíticos
(Universidade Federal de Santa Maria, 2014-02-17)
The aim of this work is to give some sufficient conditions for the existence and multiplicity of the solutions for a class of elliptic problems, using for this variational methods, such as Montain Pass Theorem and the ...
Solução de problemas em semiespaço na dinâmica de gases rarefeitos baseada em modelos cinéticos
(Universidade Federal de Santa Maria, 2012-02-28)
The method discrete ordinates is used to solve problems involving rarefied gas dynamics. In this
work, a version of the analytical method discrete ordinates (ADO) is used to solve problems in a
semi-infinite. The complete ...
O problema de Dirichlet para a equacão dos gráficos mínimos com dado no bordo lipschitz contínuo
(Universidade Federal de Santa Maria, 2016-12-02)
In this work, we study existence and non existence for the Dirichlet problem for the minimal
graph equation in non convex domains of the plane. We search for conditions on the boundary
data which be the less restricted ...
Formulacão unificada para modelos cineticos derivados da equação de Boltzmann com condições de contorno generalizadas
(Universidade Federal de Santa Maria, 2012-02-28)
In this paper, we present numerical results obtained from the FORTRAN language for physical quantities of interest such as velocity profile, pro�le, heat ow rate, particle ow rate,heat ux and pressure tensor component. The ...
O modelo de McCormack no escoamento de gases rarefeitos
(Universidade Federal de Santa Maria, 2011-02-24)
In this paper, we present numerical results for macroscopic quantities of interest (velocity
profile, the heat ow profile and shear stress) for the
ow of a binary mixture of rarefied gases in microchannels of arbitrary ...
Estudo da dinâmica de um gás confinado em placas paralelas heterogêneas utilizando o modelo S
(Universidade Federal de Santa Maria, 2011-05-18)
In this work, an analytical version of the method of discrete ordinates (ADO) is used
in developing solutions to problems of rarefied gases confined by two infinite parallel
plates with different chemical constitutions, ...
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 ...