منابع مشابه
Marine Borers Resistance of Chemically Modified Portuguese Wood
An adequate service life of wooden structures in the sea is ensured only: If wood is treated with biocide wood preservatives with high retention level or; If some tropical hardwoods, with known natural resistance, are used. However, the poor public image of use the tropical hardwoods, as contribution to deforestation at one hand and legal requirements to restrict the use of biocide preservative...
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The concept of traceability is defined according to the standard ISO 8402 like “the ability for the retrieval of the history and use or location of an article or an activity through a registered identification”. Their implementation in the wood industry is delayed because of the limits of classical automatic identification systems in regard to the nature of wood and the features of the manufact...
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An increasing number of marine structures are utilizing composite materials. Major structure and components can be built lighter and corrosion-resistant using composite construction. The recreational boating industry has long recognized this and now commercial ferries are increasingly realizing fuel savings through weight reduction. The US Navy’s DDG-1000 topside structure and LPD-17 advanced e...
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In this paper the determination of the material properties of a rectangular wooden bar is presented and the detection of defects in the bar is discussed. The material properties of the bar are evaluated by theoretical and measured dispersion curves using parametric model fitting. A numerical finite difference model with secondand fourth-order approaches is developed. To detect a defect a numeri...
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Exist forms and criticalities of disfigurements of marine engines were studied from main propulsive engine, auxiliary facility and hull. Eddy current Non-destructive testing method was brought forward to disfigurement inspection of marine engines with advantages such as celerity and nicety. Cracks, as one form of disfigurements, testing of marine engines were demonstrated in detail, and the dev...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1909
ISSN: 0036-8733
DOI: 10.1038/scientificamerican01021909-12supp