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Introdução à teoria da relatividade geral
(Universidade Federal de Santa Maria, 2010-01-08)
This manuscript deals with the construction of the General Relativity Theory. To achieve this goal, we first review the basic mathematical tools, namely: Differential Geometry, Geodesics, Curvature Tensor, Metric Tensor, ...
Aspectos dimensionais da massa do fóton na eletrodinâmica quântica
(Universidade Federal de Santa Maria, 2014-12-10)
The gauge invariance of Quantum Electrodynamics establishes a non massive character for the photon field. Nevertheless, corrections at one loop level for the self-energy of the photon can induce mass generation in some ...
Estudo da deformação espontânea em nanotubos de BCN e suas propriedades eletrônicas
(Universidade Federal de Santa Maria, 2011-12-09)
The amazing properties of carbon nanotubes (such as good flexibility while high mechanical strength) technologies and their applications motivate research in this area. Following the successful synthesis of carbon nanotubes, ...
Estudo da atividade solar no passado em função da radiação cósmica
(Universidade Federal de Santa Maria, 2014-03-20)
The study about cosmic radiation arriving the Earth represents an important register of its variations, as the physical phenomena who cause these variations. In the solar system the variation is strongly modulated by the ...
Estudo teórico das propriedades mecânicas e eletrônicas de nanoestruturas de BN
(Universidade Federal de Santa Maria, 2011-12-09)
Boron Nitride (BN) is a stable compound where boron and nitrogen are united by covalent bonds. It is also a material with hardness similar to diamond but more stable, retaining their hardness up to 2.000 °C while diamond ...
Medidas de transporte eletrônico empregando baixíssimas correntes
(Universidade Federal de Santa Maria, 2011-12-09)
This work aims at a detailed investigation of the measurement technique used for the study of transport phenomena in structures with at least one dimension on the nanoscale, such as thin films (a nanometer scale) or granular ...
Estrutura eletrônica de folhas de C e BN com empilhamento de Fibonacci
(Universidade Federal de Santa Maria, 2011-12-09)
In this monograph we study the electronic properties of anexisting theoretical material consisting of shuts of boron nitride type honeycomb, also known by hBN, interspersed with graphene sheets in order to respect a Fibonacci ...
Aplicação de inteligência artificial em modelagem científica
(Universidade Federal de Santa Maria, 2016-12-15)
Artificial Intelligence (A.I.) is a growing field of research aiming to make intelligent agents which can solve hard problems and auxiliate in computational activity. Neural network is an A.I. field inspired by concepts ...
Modelo para turbulência na camada limite atmosférica noturna utilizando equações prognósticas para a energia cinética turbulenta e fluxo de energia na forma de calor sensível
(Universidade Federal de Santa Maria, 2014-01-16)
The determination of the turbulent fluxes in very stable conditions is done, generally, through parametrizations. In this work the turbulent fluxes are estimated, by using a simplified model, through prognostic equations ...
Efeitos secundários do buraco de ozônio antártico sobre a região Sul do Brasil
(Universidade Federal de Santa Maria, 2008-12-09)
The antarctic ozone hole is defined as the area where the ozone total column is less than 220 DU. Due to the polar vortex, the ozone poor air masses are restricted to high latitudes. However, some air masses can reach lower ...