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Estudo teórico das propriedades fotocatalíticas das ftalocianinas
(Universidade Federal de Santa Maria, 2019-02-20)
Phtalocyanines constitute a class of aromatic molecules that have been used by industry mainly
as dyes or pigments. More recently different Phtalocyanine derivatives were synthesized and are
been employed to fabricate ...
Propagação de alvos em redes neurais artificiais
(Universidade Federal de Santa Maria, 2019-02-22)
Artificial neural network is a type of artificial intelligence focued on the study of learning systems
with data. The training of neural networks requires a method that evolves their internal
parameters, which are ...
Populações estelares e gás ionizado em galáxias esferoidais centrais
(Universidade Federal de Santa Maria, 2019-07-10)
Central galaxies of dark matter massive halos, usually of spheroidal morphology, have distinct
physical properties of non-central spheroidal galaxies with comparable mass. Several studies
suggest that, because they are ...
Teoria do funcional da densidade acoplada ao modelo de Hubbard de uma banda aplicada ao supercondutor La2−xSrxCuO4
(Universidade Federal de Santa Maria, 2020-09-15)
In this work we present the results of a methodology that combines first-principle Density
Functional Theory calculations with the Green’s functions method in order to treat strongly
correlated electronic systems. The ...
Um pipeline de redução de dados espectroscópicos para eventos de quilonova
(Universidade Federal de Santa Maria, 2020-11-09)
This work presents the process of making a pipeline for the reduction of longslit spectroscopic
data, acquired with the GMOS instrument of the Gemini Observatory as part of the optical
follow-up of kilonovae candidates. ...
Pseudogap e energia cinética de supercondutores não convencionais descritos por um modelo de Hubbard em duas dimensões
(Universidade Federal de Santa Maria, 2020-03-30)
In conventional superconductors described by the Bardeen-Cooper-Schrieffer (BCS) Theory,
the transition from the normal to the superconducting state is accompanied by a reduction
in the potential energy and an increase ...
Sistemas magnéticos com interações competitivas: uma abordagem de campo médio com clusters
(Universidade Federal de Santa Maria, 2020-04-27)
We study a model of localized spins which can assume three different states, S = 0 and
1, with two competing interactions: a antiferromagnetic first neighbour interaction (JA)
and a three body interaction between third ...
Complementariedade, emaranhamento, incerteza e invariância de Lorentz
(Universidade Federal de Santa Maria, 2021-05-20)
Bohr’s complementarity principle was introduced as a qualitative statement about quantum
systems, which have properties that are equally real, but mutually exclusive. This
principle, together with the uncertainty principle, ...
Não-estacionariedade de séries temporais turbulentas e a grande variabilidade dos fluxos nas baixas freqüências
(Universidade Federal de Santa Maria, 2011-08-11)
Turbulent flow high complexity makes it difficult to describe complex phenomena,
such as the transport of vector and scalar quantities at the lower atmosphere,
making the analysis of experimental data, such as time series, ...
Decaimento da turbulência na camada superficial
(Universidade Federal de Santa Maria, 2005-04-27)
This dissertation presents a study of the atmospheric turbulence decay on the surface layer during the evening transition. This is done through the analysis of the spectral densities temporal evolutions of the three wind ...