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| Daste, S. |
| The "CRABE" method is a crack detection technique based on the use of low electromagnetic frequencies. This (patented) method relies on a global injection of current within the structure under inspection. The presence of a crack shall cause a disruption in the current flow, and consequently of the magnetic field off the surface in the vicinity of a defect. It is this magnetic signature which is detected by the magnetic sensor used with "CRABE". The major advantage of this process, developed by TRAVOCEAN and the LETI Division of CEA with the help of IFREMER, appears clearly: No preliminary cleaning of the welds to be inspected is required, since no contact is necessary. Similarly, it shall be possible to inspect the whole of structures to a total cost all... |
| Tipo: Text |
Palavras-chave: Offshore structures; Fouling; Underwater exploration; Steel structures; Sensors; Cracks; Detection; Unmanned vehicles; Marine technology. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-1161.pdf |
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| Rothley, Kristina; Simon Fraser University; krothley@sfu.ca. |
| Least-cost modeling is an increasingly popular method used to measure the effective distance between habitat patches and to assess the connectivity of existing landscapes or potential reserves. For least-cost models to be reliable and credible, however, the validity of input data must be demonstrated. Least-cost modelers must also exercise extreme caution when using any GIS-based analysis of this kind. Technical issues associated with the raster-based representation of spatial data may introduce errors in otherwise correct data that nullify results. In this paper, I address the potential presence of "cracks" in the resistance input layer of least-cost modeling exercises. Cracks result when narrow, costly features, such as roads or train tracks, are... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Connectivity analysis; Cracks; Least-cost modeling; Resistance layers.. |
| Ano: 2005 |
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| Eleoterio, Jackson Roberto; Bagattoli, Tania Regina; Hornburg, Kerling Fabiane; Kirchheim da Silva, Cláudia Mariana. |
| O objetivo deste trabalho foi avaliar a secagem drástica de pequenas amostras como alternativa metodológica para a definição de programas de secagem umidade-temperatura, aplicando-a para madeira de Corymbia torelliana, Eucalyptus cloeziana, E. grandis x E. urophylla, E. pilularis e E. resinifera e avaliar a possibilidade de agrupar espécies com recomendações semelhantes. Foram utilizadas peças com dimensões iniciais de 100 mm de comprimento, 50 mm de largura e 10 mm de espessura. Essas foram mantidas em estufa a 100 °C, até que o teor de umidade atingisse valores inferiores a 5%. Durante a secagem drástica as peças foram pesadas em intervalos de 1 h e foram medidos o comprimento e a largura das rachaduras, utilizando paquímetro e calibrador de folga. Em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos Florestais e Engenharia Florestal Tecnologia e Utilização de Produtos Florestais Relações Água-Madeira Secagem convencional; Rachaduras; Taxa de secagem Conventional drying; Cracks; Drying taxes. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/696 |
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