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Um modelo SIS com taxas de recuperação e infecção variáveis
(Universidade Federal de Santa Maria, 2023-10-31)
In this dissertation we present a qualitative theoretical study of modifications to the SIS
epidemiological model for infectious diseases that do not confer immunity. We first study the
classic SIS model, which considers ...
Um modelo SIR com duas cepas circulantes
(Universidade Federal de Santa Maria, 2023-10-27)
To understand the evolution of many diseases such as influenza and COVID-19, for
example, it is necessary to consider the presence of multiple strains of the pathogen.
Models with multiple strains of the disease-causing ...
Análise de agrupamentos a partir de parâmetros morfométricos para identificar classes morfológicas de galáxias
(Universidade Federal de Santa Maria, 2019-07-10)
To understand galaxies processes of formation and evolution, it is essential to identify properties
that allow their classification. It is common to perform this type of classification through
visual and individual ...
Emprego de modelos Euleriano no estudo da dispersão de contaminantes na camada limite planetária
(Universidade Federal de Santa Maria, 2016-12-16)
The transport models and dispersion of contaminants in the atmosphere are mathematical
tools extremally useful at prediction and evaluation of concentration of pollutants
issued by di erent polluting sources. Theses ...
Supercondutividade na presença de correlações que podem gerar pseudogap
(Universidade Federal de Santa Maria, 2019-09-30)
Since the discovery of superconductivity at high temperatures in 1986, the problem
of correlations in superconductivity has received a lot of attention, but it remains as
an open problem in condensed matter physics. In ...
Condutividade térmica de compostos XTe (X=Cd,Pb) nanoestruturados a partir de simulações computacionais
(Universidade Federal de Santa Maria, 2018-11-28)
In this work we study the thermal conductivity coefficient κ of bidimensional nanostructured systems
of cadmium telluride (CdTe) and lead telluride (PbTe). At room temperature and bulk phase, these
compounds present ...
Complexos de vanádio(V) derivados de trifenilfosfônios e hidrazidas: avaliações estruturais, interações com dna e hsa e potencialidades citotóxicas
(Universidade Federal de Santa Maria, 2023-12-20)
The development of new drugs and prodrugs with antiprotozoal, antibacterial, and antineoplastic therapeutic actions is currently focused on non-covalent and reversible interactions with deoxyribonucleic acid. In this effort, ...
Evidências da eletrização de polímeros dielétricos durante a impressão 3D
(Universidade Federal de Santa Maria, 2024-01-23)
During the fused deposition (FDM) 3D printing process, several effects are observed on the deposited polymers. These effects include phase change, extrusion, voltage gradient, friction, contact between different ...
Determinação simultânea de agrotóxicos e micotoxinas em fitoterápicos: Validação e aplicação de métodos multirresíduo empregando LC-MS/MS
(Universidade Federal de Santa Maria, 2023-02-27)
The use of herbal medicines has increased significantly, but the presence of pesticide residues as well as the presence of mycotoxins have generated constant discussion and concern on the part of regulatory agencies. The ...
Determinação da bioacessibilidade de metais em suplementos alimentares por espectrometria de emissão óptica após protocolos in vitro
(Universidade Federal de Santa Maria, 2023-03-06)
Dietary supplements are defined as products to supplement the diet and provide essential nutrients for
the humans. They can contain vitamins, minerals, botanical products, amino acids, or any combination
of these. The ...