Non Destructive Measuring
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Response of the TDR sensor to moisture under different types of management of a typical Latosol in the Cerrado
RESUMO A técnica de Reflectometria no Domínio do Tempo (TDR) tem se destacado na avaliação da umidade do solo, por ser um método instantâneo, não destrutivo, preciso e pouco dependente dos fatores ambientais. Porém, pesquisadores têm enfatizado a necessidade de calibração específica e contínua para cada condição de manejo do solo. Portanto, ob
Rev. Ciênc. Agron.. Publicado em: 2019-03
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2. Simulação da propagação de ondas ultrassônicas longitudinais em materiais estruturais aeroespaciais / Simulating the propagation of longitudinal ultrasonic waves in aerospace structural materials
The use of composite materials in the aerospace industry is increasing due to its low ratio between density and mechanical strength. To perform non-destructive testing using ultrasound, it is necessary to know the sound velocity in these materials. It is not always possible to manufacture physical prototypes during the development of a project because of tim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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3. Avaliação da influência da origem e do tratamento dos agregados reciclados de resíduos de construção e demolição no desempenho mecânico do concreto estrutural. / Evaluate the influence of origin and processing of recycled aggregates from construction and demolition waste on the mechanical performance of structural concrete.
A cadeia da construção civil é uma grande causadora de impactos ambientais, pois além do alto consumo de recursos naturais gera também grandes quantidades de resíduos. Isto traz elevados custos à sociedade pela necessidade de remoção e destinação dos resíduos, normalmente depositados em aterros. A reciclagem tem sido uma alternativa para reduçã
Publicado em: 2010
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4. Modelos MatemÃticos para Estimativa da Ãrea Foliar de um Cafeeiro por Meio de AnÃlise de Imagens / Estimation models of leaf area in a coffee tree using image analysis.
One feature of most horticultural crop plants that is biologically relevant to their yield and productivity is total leaf area. However, the direct methods of estimation of the leaf area cause damages to the plants and are time consuming, whereas the indirect methods based on image analysis, which are non-destructive, demand accuracy in the set up of the mea
Publicado em: 2009
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5. EstimaÃÃo de ParÃmetros GenÃticos, FenotÃpicos e Ambientais para a Qualidade da Madeira de Eucalyptus em Ãrvores Vivas. / Estimation Of Genetic, Phenotypic And Environmental Parameters For Eucalyptus Wood Quality In Living Trees.
The evaluation of the technological characteristics of wood, in most times, is accomplished through destructive methods. But, that process make it impossible the evaluation of a large number of genetic materials. So, the utilization of non-destructive methods makes it possible to evaluate a large amount of trees, allowing a more intensive selection of trees
Publicado em: 2007
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6. Ultrasonic characterization of composite materials. / Caracterização de materiais compostos por ultra-som.
In this work, two ultrasonic non destructive techniques were implemented in a water tank and used to determine the elastic constants of glass-epoxy composites samples. The first is the through-transmission technique implemented with a pair of ultrasonic transducers. The second is the back-reflection technique that uses a single transducer in pulse-eco mode.
Publicado em: 2006
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7. A broadly applicable continuous spectrophotometric assay for measuring aminoacyl-tRNA synthetase activity.
We describe a convenient, simple and novel continuous spectrophotometric method for the determination of aminoacyl-tRNA synthetase activity. The assay relies upon the measurement of inorganic pyrophosphate generated in the first step of the aminoacylation of a tRNA. Pyrophosphate release is coupled to inorganic pyrophosphatase, to generate phosphate, which i
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8. Relation between small airways disease and parenchymal destruction in surgical lung specimens.
The relation between small airways disease and parenchymal destruction was investigated in lungs and lobes removed at surgery from 27 patients aged 15-70 years. Eight of the 27 patients were life-long non-smokers. The degree of small airways disease was assessed by semi-quantitative grading (SAD score) and by measuring diameter and wall thickness of membrano