Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 190-199).

Universiẗat, Diss., 1997--Gießen.

University, Diss., 2002--Tübingen.

Thesis (M.A.P.S.)--Associated Mennonite Biblical Seminaries, 1983. / Includes bibliographical references (leaves [74]-77).

O objetivo desta dissertação é estudar o problema de autovalor de Dirichlet para variedades riemannianas completas. Mais precisamente, pretendemos estudar uma cota por baixo para o -ésimo autovalor de um domínio limitado em uma variedade riemanniana completa. Tal cota é obtida fazendo-se uso de uma fórmula de recorrência de Cheng e Yang e um teorema de Nash. Ademais, pretendemos estudar uma desigualdade universal para os autovalores no espaço hiperbólico. / The goal of this dissertation is to study the Dirichlet eigenvalue problem for a complete riemannian manifold. More accurately, we intend to investigate a lower-bound for the -ℎ eigenvalue on a bounded domain in a complete riemannian manifold. Such a bound is obtained by making use of a recursion formula of Cheng and Yang and Nash’s Theorem. Furthermore, we study a universal inequality for eigenvalues of the Dirichlet eigenvalue problem on a bounded domain in a hyperbolic space (−1).

When developing network configuration/orchestration applications, it is often convenient to run automated as well as manual tests towards simulated rather than actual hardware devices. Though there exists software of this type, they rarely contain features that can be convenient for testing purposes. The simulation needs to be lightweight, be able to generate special events, and use the NETCONF RPC protocol. This thesis will explain the decisions that were made while developing a simulation software of this type, it will also explain the underlying functionalities and terms associated with the simulation.

This thesis examines the digital photo composites of Chinese artist Yang Yongliang (b. 1980, Shanghai) from 2007-2012 by selecting three distinct series that focus on three cities. This thesis approaches Yang’s Shanghai-based digital landscape prints (shuma shanshui), his 2012 series A Bowl of Taipei, and his 2010 series Greece, Greece and investigates how they relate to Asian art history, contemporary art discourse, and urban theories, including Rem Koolhaas’s 1995 essay “The Generic City.” This thesis moves beyond the simple binaries with which Yang’s works are often described – past versus present, nature versus city, tradition versus modernity – dichotomies similar to those used to characterize recent urbanization in most major cities, as observed in Koolhaas’s writing. This thesis argues that Yang’s works inhabit multiple positions simultaneously and offer new potentials for expanding beyond the generic city.

Made available in DSpace on 2014-06-11T19:25:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-08Bitstream added on 2014-06-13T18:53:33Z : No. of bitstreams: 1 sa_fl_me_guara.pdf: 527655 bytes, checksum: ce3c2e41805e19e7e9763063d33b1f56 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Universidade Estadual Paulista (UNESP) / Neste trabaho realizamos um estudo detalhado do posicionamento dos zeros de Yang- Lee do modelo de Blume-Emery-Griffiths unidimensional atraves de metodos analiticos e numericos. Em particular, analisamos o efeito de uma rede dinamica (aneis conexos e desconexos) sobre tais zeros. Nossos resultados numericos e um calculo via ponto de sela indicam que estes ultimos tendem aos zeros do modelo definido sobre um anel conexo (condicões periodicas de contorno) no limite termodinâmico. Conjecturamos a existência de uma região no espaço de parâmetros do modelo para a qual os zeros correspondem a campos magneticos puramente imaginarios independentemente da temperatura. Nossos resultados mostram que, ao contrario do que sugere resultados anteriores para o modelo de Blume-Capel, nao ha uma relacao direta entre os mínimos de energia e a posicao dos zeros de Yang-Lee. Para o caso de um anel conexo deduzimos uma equação aproximada para a curva dos zeros de Yang-Lee a partir dos autovalores da matriz de transferencia. Resultados numericos e analíticos mostram que mesmo com alguns acoplamentos antiferromagneticos temos zeros para campos magneticos puramente imaginarios. Por fim, calculamos numericamente a densidade dos zeros proximos a ponta da curva a qual pertencem (singularidade da ponta de Yang-Lee) obtendo atraves de ajustes numericos e relações de escala de tamanho finito uma densidade que diverge na ponta com expoente crítico proximo de -1/2 mesmo quando o campo magnetico nao þe puramente imaginario e a rede þe dinamica. / In this work we carry out a detailed study of the position of the Yang-Lee zeros of the one-dimensional Blume-Emery-Griffiths model through analytic and numerical methods. In particular, we analyze the effect of a dynamical lattice (connected and non-connected rings) over such zeros. Our numerical results and a saddle point caulculation indicate that such zeros tend to overlap the zeros of the model defined on one-ring (periodic boundary conditions) in the thermodynamic limit. We conjecture the existence of a region in the parameter space of the model where the zeros correspond to purely imaginary magnetic fields independently of the temperature. Here we show that, contrary to the previous results for the Blume-Capel model, there is no straightforward relationship between the energy minima and zeros position. For the connected ring we deduce the approximate equation for the Yang-Lee zeros curve from the eigenvalues of the transfer matrix. Our numerical and analytic results show that even with some antiferromagnetic couplings we have zeros at purely imaginary magnetic field. Finally, we calculate numerically the density of the zeros close to the edge of the curves (Yang-Lee edge singularity) obtaining, through numerical fits and finite size scaling relations, a density which diverges at the edge with critical exponent approximately -1/2 even when the magnetic field is not purely imaginary and the lattice is dynamic.

No description available.

O objetivo desta dissertação é estudar o problema de autovalor de Dirichlet para variedades riemannianas completas. Mais precisamente, pretendemos estudar uma cota por baixo para o -ésimo autovalor de um domínio limitado em uma variedade riemanniana completa. Tal cota é obtida fazendo-se uso de uma fórmula de recorrência de Cheng e Yang e um teorema de Nash. Ademais, pretendemos estudar uma desigualdade universal para os autovalores no espaço hiperbólico. / The goal of this dissertation is to study the Dirichlet eigenvalue problem for a complete riemannian manifold. More accurately, we intend to investigate a lower-bound for the -ℎ eigenvalue on a bounded domain in a complete riemannian manifold. Such a bound is obtained by making use of a recursion formula of Cheng and Yang and Nash’s Theorem. Furthermore, we study a universal inequality for eigenvalues of the Dirichlet eigenvalue problem on a bounded domain in a hyperbolic space (−1).