Buscar
Itens para a visualização no momento 1-10 of 13
Efeitos de frustração geométrica em antiferromagnetos desordenados com clusters
(Universidade Federal de Santa Maria, 2019-01-11)
In magnetic systems, frustration - which refers to the inhability to satisfy all the interactios
simultaneously - has ravealed a rich phenomenology. In particular, disorder and geometrical
features are possible sources ...
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 ...
Efeitos de campos magnéticos aleatórios em sistemas de vidro de spin com clusters
(Universidade Federal de Santa Maria, 2019-03-08)
This work investigates the effects of the presence of random magnetic fields (RFs) in
thermodynamic quantities that characterize the spin glass state (VS). We adopt a cluster
spin model that considers long-range disordered ...
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 ...
Estudo do desalinhamento entre os eixos de anisotropia via magnetorresistência anisotrópica em sistemas com exchange bias
(Universidade Federal de Santa Maria, 2019-11-28)
The Exchange Bias effect (EB) arises in systems with interfacial coupling, generally between
a ferromagnetic (FM) and a antiferromagnetic (AFM) material. The well-known manifestations
of this phenomenon are the field ...
Efeitos da hibridização no pseudogap em um modelo de Hubbard d-p
(Universidade Federal de Santa Maria, 2019-08-30)
In this paper, we investigate the effects of hybridization with different symmetries on
the normal and superconducting properties of a Hubbard d-p model. The Hubbard d-p model
is a variation of the model proposed by ...
Simulação numérica dos regimes da camada limite estável
(Universidade Federal de Santa Maria, 2019-11-11)
Recent studies have shown that the stable boundary layer (SBL) presents two distinct regimes.
In the weakly stable regime, turbulence is continous and similarity relationships are
valid, while in the very stable regime ...
Feedback de AGN em galáxias do Projeto Manga: uma análise da distribuição e cinemática do gás ionizado
(Universidade Federal de Santa Maria, 2019-10-21)
By the end of the XX century, large data surveys began due to the development of powerful
telescopes. The Sloan Digital Sky Survey (SDSS) is one of these surveys and comprehend
subprojects like the Mapping Nearby Galaxies ...
Aperfeiçoamento de modelos numéricos para estimativa de propriedades térmicas do solo
(Universidade Federal de Santa Maria, 2019-09-02)
Understanding the soil thermal properties, in particular, diffusivity , volumetric capacity and conductivity is important in applications of several related areas, mainly soil-plant-atmosphere interaction. Studies to ...