Linear Codes
Mostrando 25-36 de 73 artigos, teses e dissertações.
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25. Analytical and experimental analysis of bond behavior between concrete and GFRP bars / Análise teórica e experimental do comportamento da aderência entre o concreto e barras de fibra de vidro impregnada por polímero
The use of new materials in civil construction combined with high technology processes leads to improvements in many aspects, like cost reductions and better structural behavior. Recently, due to corrosion of the steel bars, among other factors, many researchers have been suggesting the use of non-metallic bars as a substitution of the steel reinforcement in
Publicado em: 2007
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26. Goppa geometry codes via elementary methods / Codigos geometricos de Goppa via metodos elementares
The central objective of this dissertation was to present the Goppa Geometry Codes via elementary methods which were introduced by J. H. van Lint, R. Pellikaan and T. Hfhold about 1998. On the first past of such dissertation are presented the fundamental concepts about fields of rational functions of an algebraic curve in the direction as to define the Goppa
Publicado em: 2006
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27. Solução numérica do modelo PTT para escoamentos viscoelásticos com superfícies livres / Numerical solution of the PTT model for viscoelastic surface flows
The aim of this work is to develop a numerical method capable of simulating viscoelastic free surface flows governed by the non-linear constitutive equation PTT (Phan-Thien-Tanner). In this work three numerical methods to simulate vicoelastic Flows of fluids modelled by the PTT equation are presented. Two of these methods were developed to simulate two-dimen
Publicado em: 2006
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28. Theoretical and experimental analysis of cold-formed steel members under compression / Análise teórica e experimental de perfis de aço formados a frio submetidos à compressão
Cold-formed steel members present, in general, higher local slenderness than classical hot- rolled ones, which make them more prone to local buckling. Besides, thin-walled open sections have small torsional stiffness, and hence global torsional and flexural-torsional instability modes are many times more critical than global flexural ones. Also, distortional
Publicado em: 2006
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29. Metodo da homogeneização aplicado a otimização estrutural topologica / Homogenization method applied to structural topology optimization
This work aims to investigate and implement a structural topology optimization method based on microstructures. Two microstructure models are introduced in the optimal design problem: one orthotropic with holes, by homogenization, and other isotropic with penalization, by artificial constitutive equation. An implemented iterative program, based on the homoge
Publicado em: 2006
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30. Geometrically uniform hyperbolic codes
In this paper we generalize the concept of geometrically uniform codes, formerly employed in Euclidean spaces, to hyperbolic spaces. We also show a characterization of generalized coset codes through the concept of G-linear codes.
Computational & Applied Mathematics. Publicado em: 2005-08
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31. UMA CONSTRUÇÃO ALGÉBRICA DE CÓDIGOS GEOMÉTRICOS / AN ALGEBRAIC CONSTRUCTION OF GEOMETRIC CODES
Começamos estudando uma classe particular de códigos lineares, os chamados códigos de Goppa que s~ao obtidos calculando o valor de certas funções em pontos de Kn, onde K é um corpo finito. Apresentamos uma generalização desta construção e definimos códigos de avaliação sobre K-álgebras satisfazendo certas propriedades. Para estes códigos, desc
Publicado em: 2005
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32. O IMPACTO DAS PRÁTICAS DE GOVERNANÇA CORPORATIVA SOBRE O VALOR E O CUSTO DE CAPITAL PRÓPRIO DAS COMPANHIAS ABERTAS NO BRASIL / THE IMPACT OF CORPORATE GOVERNANCE ON FIRM VALUE AND EQUITY COST OF CAPITAL OF LISTED COMPANIES IN BRAZIL
Corporate Governance has gained greater importance to companies and research worldwide. Through this concept, corporations are understood as governance structures in which relationships become important due to the separation of control and management. In Brazil, with the changes occurring since the early 90s related to increasing foreign trade, privatization
Publicado em: 2005
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33. Artifício e presentificação: a comunicação do Fantástico
This research examines the relations between the Literature and Mediatics Ambients in the Bioy Casaress ficcional work.s. Considering the fantastic like a text of the culture, into the oral tradition, in the artes, media and literature, the author establishes news parameter of analysis in the writ of the continent, since the chronicles of the discovery until
Publicado em: 2004
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34. Analise experimental das aplicações de codigos corretores de erro em sistemas de comunicações opticas
This work presents an experimental analysis on the use of error correcting codes in optical communication systems, specifically by means of the Forward Error Correction (FEC) technique. Two electronic modules were designed and assembled during the experimental stages of the work - a coding and decoding module, which uses the Reed-Solomon RS (255,241) code, a
Publicado em: 2003
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35. Impact analysis methodology for elastic systems using the finite element method and explicit time integration. / Metodologia para a análise de impacto em sistemas elásticos usando-se o método dos elementos finitos e a integração explícita no tempo.
Impact between solid bodies is present in many areas of engineering. Relevant examples of this sort of problem can be found in machine element design, transport systems such as containers for nuclear material, pipes in chemical plants, vehicles and many others structures that should comply with safety codes issued by govern agencies. In the majority of these
Publicado em: 2003
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36. SimulaÃÃo de reservatÃrio de petrÃleo em arquiteturas paralelas com memÃria distribuida
New codes have been developed for the solution of large scale models in reservoir simulations with high performance computing. This work shows the development of a petroleum reservoir simulator using distributed memory models for parallel computers. A two phase oil/water Black-Oil model was implemented and the resulting equations are discretized by ânite di
Publicado em: 2002