Submissões recentes

  • Dynamics of structured populations

    Mendes Coutinho, Renato (Universidade Estadual Paulista (UNESP), 2015) [Tese de doutorado]
    Esta tese aborda a dinâmica de populações biológicas estruturadas. Essas estruturas podem ser quaisquer características que distinguam indivíduos da mesma população: sexo, idade, estágio, tamanho, localização espacial. ...
  • Deformações quânticas de álgebras conformes

    Batista, Eliezer Autor UNESP (Universidade Estadual Paulista (UNESP), 1997) [Tese de doutorado]
  • Aspectos clássicos de teorias de segunda ordem

    Pompéia, P. J Autor UNESP (Universidade Estadual Paulista (UNESP), 2009) [Tese de doutorado]
    In this work, classical and semiclassical aspects of second order theories were analyzed. First the formulation of a gauge theory for systems whose Lagrangian for the gauge field depends on the field itself and its first ...
  • Pure spinor superstring partition function

    Arroyo Montero, E. A Autor UNESP (Universidade Estadual Paulista (UNESP), 2008) [Tese de doutorado]
    In this thesis, we have calculated the partition function of pure spinors. The computation is performed by using two different methods, namely ghosts-for-ghosts (up to the twelth mass-level) and fixed point (up to the fifth ...
  • Uma abordagem de potencial e massa efetiva e a descrição de espaço de fase quântico para tratar sistemas de spins: Caracterizando o tunelamento de spin e propriedades da molécula de Fe8

    Silva, E. C Autor UNESP (Universidade Estadual Paulista (UNESP), 2009) [Tese de doutorado]
    We have used an angle-based description and the quantum discrete phase space formalism to characterize Fe8 cluster properties. Through the angle-based approach we have calculated the the ground state barrier height, the ...
  • Energia escura e formação de estruturas em larga escala

    Liberato, L Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    We investigate large scale structure formation in universe with dark energy presence. The dark energy influence on cosmological perturbation growth is exerted both through its effect on the expansion rate of background, ...
  • Equação de Estado para o Universo Primordial

    Medeiros, Léo Gouvêa Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    The main purpose of this thesis is to explore the role of the nuclear interactions during the early universe. For that, we import to cosmology an equilibrium statistical mechanics formalism based for relativistic interacting ...
  • Construção exata de sólitons de Hopf

    Bonfim, A. C. R. do Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    ur object of study are classical field theories which possesses topological solitons and have a infnite number of conserved quantities .In particular our models have what is know as Hopf charge. This charge appears because, ...
  • Dinâmica de campos escalares fora do equilíbrio

    Farias, R. L. S Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    We consider the nonequilibrium dynamics of the formation of a condensate in a spontaneously broken'lâmbda fi' POT. 4' relativistic quantum scalar field theory. The equation of motion of the corresponding order parameter ...
  • Eletrodinâmica de ordem superior em (2+1)D

    Dias, M Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    We present in this work a number of results in Poldolsky's formulation of the (2+1) dimensional Electromagnetism. We focus our attention on the nonrelativistic regime of scatterings. We analyse the possibility of existence ...
  • Modelos de Schwinger, Thirring e Kondo à temperatura finita: um estudo

    Oliveira, R. de Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    We study the thermodynamical properties of some bidimensional Quantum Field Theories: the Schwinger model, Thirring model and the gauged Thirring model. The study is based on the systematic application of the Dirac's ...
  • Quebra de Simetria no Universo Primordial

    Cuzinatto, R. R Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    Analytic expressions for solutions in the Standard Model are presented here for all combinations of 'lâmbda' = 0, 'lâmbda'diferente 0, 'capa' = 0 and 'capa'diferente'0 in the presence and absence of radiation and nonrelativistic ...
  • Mistura de sabor e violação de CP

    Nishi, C. C Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    he aim of this thesis is the study of the properties of CP violation and flavor mixing in the Standard Model (SM) and in some of its extensions. We study the connection between both phenomena and their relation with the ...
  • Sobre a desintegração de prótons em movimento circular em campos gravitacionais

    Fregolente, D Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    We investigate the possible decay of protons in geodesic circular motion around neutral compact objects. Weak and strong decay rates and the associated emitted powers are calculated using a semi-classical approach. Our ...
  • Pseudomecânica: partículas de spins inteiros, semi-inteiros e fracionários

    Pazetti, M Autor UNESP (Universidade Estadual Paulista (UNESP), 2007) [Tese de doutorado]
    We use the pseudomechanics to study non relativistic particles and massive and massless relativistic particles, all of them with spin. In this last case massless, we have two situations: in the first one, we built an ...
  • Constante cosmológica: algumas consequências algébricas e dinâmicas

    Beltrán Almeida, J. P Autor UNESP (Universidade Estadual Paulista (UNESP), 2006) [Tese de doutorado]
    In this thesis we study two different aspects of the physics of the cosmological constant: the algebraic structure of the de Sitter group, and its implications in the large scale dynamics of the Universe. In the first part ...
  • Teorias semiclássica e efetiva da gravitação

    Paszko, R Autor UNESP (Universidade Estadual Paulista (UNESP), 2006) [Tese de doutorado]
    First and second order corrections for the scattering of different types of particles by a weak gravitational field, treated as an external field, are calculated. These computations indicate a violation of the Equivalence ...
  • Modelo de Fisher-Kolmogorov em dinâmica populacional com capacidade de suporte espacialmente dependente

    Carvalho, P. G. S de Autor UNESP (Universidade Estadual Paulista (UNESP), 2003) [Tese de doutorado]
    We study the spatial and temporal dynamics of a biological population by means of the Fisher-Kolmogorov equation, taking into account a logistic growth and a fickian diffusion. Special attention is payed to the case where ...
  • A eletrodinâmica escalar generalizada de Duffin-Kemmer-Petiau, uma análise funcional de sua dinâmica quântica covariante e o equilíbrio termodinâmico

    Nogueira, Anderson Antunes Autor UNESP (Universidade Estadual Paulista (UNESP), 2016) [Tese de doutorado]
    Este trabalho tem como objetivo explorar a dinâmica quântica de interação entre partículas escalares e vetoriais e estudar o equilíbrio termodinâmico dessas partículas no ensemble gran-canônico. A dinâmica de interação, ...
  • Tópicos em teoria das perturbações cosmológicas

    Santos, Renato da Costa Autor UNESP (Universidade Estadual Paulista (UNESP), 2016) [Tese de doutorado]
    In this thesis the Theory of Cosmological Perturbations is reviewed and three original topics, that are part of this huge branch of theoretical cosmology, are presented. We start by reviewing and deducing the needed formulas ...

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