Buscar
Itens para a visualização no momento 51-60 of 152
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 ...
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 ...
Modelo simplificado para turbulência na camada limite noturna
(Universidade Federal de Santa Maria, 2016-03-08)
The appropriate estimation of turbulent fluxes in very stable conditions is a great challenge
for numerical models that simulate the average behavior of the stable boundary layer.
Although many features of the flow are ...
Caos na camada limite atmosférica noturna
(Universidade Federal de Santa Maria, 2009-04-08)
A three-equation model, based on prognostic expressions for the Richardson number, turbulent kinetic energy and wind shear is proposed to represent turbulent behavior in the nocturnal boundary layer (NBL). Integration ...