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Estudo das propriedades eletrônicas e estruturais da heterojunção dos nanotubos de nitreto de boro e nitreto de alumínio
(Universidade Federal de Santa Maria, 2007-05-18)
In this work we present the study of the electronic and structural properties of the heterojunction formed by (10,0) zig-zag nanotubes of aluminum nitride (AlN) and boron nitride (BN). To simulate the system, we use periodic ...
Estudo do ciclo diário da camada limite planetária através da simulação dos grandes turbilhões
(Universidade Federal de Santa Maria, 2008-12-15)
The PBL is the region on the troposphere characterized by existence of turbulence (BUSINGER, 1981). Turbulent flow is that when the fluctuations of the variables that describe the flow are amplified in time and space ...
Estudo de primeiros princípios da interacão de monóxido de carbono com nanotubos de carbono semicondutores
(Universidade Federal de Santa Maria, 2004-10-08)
In this work we study the interaction of carbon monoxide with semiconducting (8,0)carbon nanotube through a first principles theoretical approach. Using density functional theory based methods, we show that radial ...
Estudo teórico do comportamento magnético do composto Y0.8Gd0.2Co3
(Universidade Federal de Santa Maria, 2004-06-08)
The itinerant ferromagnetic Y Co3, Tc = 301K, presents a crystalline structure with a hexagonal unit cell. It has thirty six atoms that are distributed in five different crystallographic sites, three for the Co and two for ...
Magnetostricção e ruído Barkhausen em aços elétricos de grão não-orientado
(Universidade Federal de Santa Maria, 2005-12-20)
Non-oriented electrical steels (NO) studied in this work are used in applications that demand isotropy of magnetic properties along the plane of the sheet, which the magnetic field is applied in different angles with respect ...
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 ...
Estudo das propriedades térmicas de nanofios de silício
(Universidade Federal de Santa Maria, 2006-06-25)
In this work we present the results of the study of thermal stability of silicon
nanowires (SiNWs), carried out by computational simulation using Monte Carlo
methods. The study focuses on cylindrical nanowires grown in ...
Simulação do comportamento superhidrofóbico em rampas de pilares
(Universidade Federal de Santa Maria, 2014-08-28)
We present a two-dimensional simulation based on the cellular Potts model
(CPM) of the properties of smooth and pillar structured hydrophobic surfaces. For a
surface having superhidrophobic behavior, a drop ...
Variações espaciais de propriedades físicas em Puppis A
(Universidade Federal de Santa Maria, 2009-05-27)
The current work presents some physical proprieties from a region of the galactic supernova remnant Puppis A. For that, long slit spectrophotometric data were obtained in distinct positions. The data were obtained in 14 ...
A hipótese de turbulência localmente isotrópica e a universalidade da constante de Kolmogorov
(Universidade Federal de Santa Maria, 2006-05-03)
According to the Kolmogorov's fully developed turbulence theory established in 1941, there is an equilibrium range in which phenomenological quantities associated to the turbulence flow are described by laws of universal ...