Non Destructive Methods
Mostrando 25-36 de 60 artigos, teses e dissertações.
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25. Aplicação de métodos não destrutivos na avaliação das propriedades físicas do lenho de árvores de Pinus caribaea var. hondurensis Barr. et Golf. e Tectona grandis (L.f.) / Application of non-destructive methods to evaluate physical properties of the wood of trees of Pinus caribaea var. hondurensis Barr. et Golf. and Tectona grandis (L.f.)
A aplicação de métodos não destrutivos (MND) invasivos - extração de amostras do lenho do tronco das árvores com sondas metálicas - e não invasivos análise do lenho diretamente no tronco - permite a avaliação da qualidade do lenho, dos defeitos internos e sua aplicação como madeira sólida. No presente trabalho são aplicados os MND invasivo (d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011
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26. Microtomografia com Raio X e processamento de imagem na obtenção da porosidade do concreto / X Ray microtomography and image processing to obtain the concrete porosity
The main goal of this research was to use non-destructive methods (ND), like the X Ray microtomography and techniques to acquire and process images, to obtain the concrete porosity. There were presented two methods. In one of the methods the images were acquired through X Ray microtomography and in the other method there were used the commercial scanner to a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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27. Química forense: perspectivas sobre novos métodos analíticos aplicados à documentoscopia, balística e drogas de abuso
In this review recent methods developed and applied to solve criminal occurences related to documentoscopy, ballistic and drugs of abuse are discussed. In documentoscopy, aging of ink writings, the sequence of line crossings and counterfeiting of documents are aspects to be solved with reproducible, fast and non-destructive methods. In ballistic, the industr
Química Nova. Publicado em: 2011
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28. A simple and reliable method for the screening of transgenic tobacco plants.
Even though much improvement has been made in plant transformation methods, the screening of transgenic plants is often a laborious work. Most approaches for detecting the transgene in transformed plants are still time-consuming, and can be quite expensive. The objective of this study was to search for a simpler method to screen for transgenic plants. The in
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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29. Thyroid hormonal disturbances related to treatment of hepatitis C with interferon-alpha and ribavirin
OBJECTIVE: To characterize thyroid disturbances induced by interferon-alpha and ribavirin therapy in patients with chronic hepatitis C. INTRODUCTION: Interferon-alpha is used to treat chronic hepatitis C infections. This compound commonly induces both autoimmune and non-autoimmune thyroiditis. METHODS: We prospectively selected 26 patients with chronic hepat
Clinics. Publicado em: 2011
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30. Estudo da técnica de ondas de tensão como instrumento de avaliação interna de árvores urbanas
Arborization is fundamental in urban spaces, due to the significant benefits it provides. To important issue to guarantee the adequacy of the role it plays is its maintenance. To this purpose, an application of preventive methods of diagnosis is recommended, allowing the evaluation of external and internal conditions of tress. Currently, the analysis of urba
Publicado em: 2011
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31. Foil and leaf gilding on cultural artifacts: forming and adhesion
The process used to obtain foils of more and more thin thickness and coat them on artefacts varied during centuries. It started from thick foils of the first ages mechanically assembled and evolved until the rolled and beaten leaves, a few hundred nanometres thick. This paper will develop, through examples taken from laboratory studies on museum objects, the
Matéria (Rio de Janeiro). Publicado em: 2011
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32. Alternative techniques to study characters of the genitalia in Lepidoptera
The present note aims to describe two alternative methods for observing genitalia in Lepidoptera. The first one provides means to examine both male and female genitalia without spoiling the scales of the abdomen, preserving it attached to the thorax and aesthetically similar to an unexamined specimen. The second one provides ways of observing certain charact
Neotropical Entomology. Publicado em: 2010-12
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33. Comparação entre técnicas de análise de tensões residuais em anéis de rolamento do aço ABNT 52100
Atualmente, sabe-se que nenhum material apresenta-se livre de tensões residuais. Dependendo de suas características, o campo de tensões residuais pode influir positiva ou negativamente no desempenho do componente. Assim torna-se de grande importância o desenvolvimento de métodos experimentais confiáveis para a medida e controle destas tensões. No pres
Publicado em: 2010
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34. Otimização topológica de transdutores piezelétricos com gadação funcional de material: projeto, simulação, análise e fabricação. / Topology optimization of piezoelectric transducers considering functionally graded material: design, simulation, analysis and fabrication.
Piezoelectric materials generate displacements when they are excited by electrical potential and electrical potential when they are excited by force or pressure. These materials are widely applied in Precision Mechanics, Mechatronics, and Ultrasonic imaging areas. On the other hand, Functionally Graded Materials (FGM) are advanced materials, whose properties
Publicado em: 2010
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35. Genetic programming: crossover operators, building blocks and semantic emergence / Programação genética: operadores de crossover, blocos construtivos e emergência semântica
Evolutionary algorithms are heuristic methods used to find solutions to optimization problems. These methods use stochastic search mechanisms inspired by Natural Selection Theory. Genetic Algorithms and Genetic Programming are two of the most popular evolutionary algorithms. These techniques make intensive use of crossover operators, a mechanism responsible
Publicado em: 2010
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36. Reliability prediction for structures under cyclic loads and recurring inspections
Abstract: This work presents a methodology for determining the reliability of fracture control plans for structures subjected to cyclic loads. It considers the variability of the parameters involved in the problem, such as initial flaw and crack growth curve. The probability of detection (POD) curve of the field non-destructive inspection method and the cond
J. Aerosp. Technol. Manag.. Publicado em: 2009-12