This paper presents a model-based monitoring framework for the detection of fatigue-related crack damages in plate-type structures commonly seen in aluminum ship hulls. The monitoring framework involves vibration-based damage detection methodologies and finite element modeling of continuum plate structures. A Bayesian-based damage detection approach is adopted for locating probable damage areas...

Tributyltin (TBT) released into seawater from ship hulls is a stable marine pollutant and obviously remains in marine environments. We isolated a TBT resistant marine Pseudoalteromonas sp. TBT1 from sediment of a ship's ballast water. The isolate (10(9.3 +/- 0.2) colony-forming units mL(-1)) adsorbed TBT in proportion to the concentrations of TBTCl externally added up to 3 mM, where the number ...

Marine structures such as platforms, jetties and ship hulls are subject to diverse and severe biofouling. Methods for inhibiting both organic and inorganic growth on wetted substrates are varied but most antifouling systems take the form of protective coatings. Biofouling can negatively affect the hydrodynamics of a hull by increasing the required propulsive power and the fuel consumption. This...

This paper presents a method to construct an auxiliary planar domain of triangulation for tessellating trimmed parametric surface patches. By minimizing a mapping error function, an approximate locally isometric mapping between a given trimmed parametric surface patch and its triangulation domain is constructed. In this way the shape of triangular elements on the triangulation domain is approxi...

The problem of obtaining a discrete curve approximation to data points appears recurrently in several real-world fields, such as CAD/CAM (construction of car bodies, ship hulls, airplane fuselage), computer graphics and animation, medicine, and many others. Although polynomial blending functions are usually applied to solve this problem, some shapes cannot yet be adequately approximated by usin...

The enteric bacterium and potential human pathogen, Escherichia coli, is known to persist in tropical soils and coastal waters. Vibrio cholerae causes the disease cholera and inhabits marine environments including microbial films on submerged surfaces. The abundances of E. coli and V. cholerae were quantified in biofilm and water-column samples from three harbors in Honolulu, Hawai'i, which dif...

Preliminary prediction of resistance and power is a fundamental aspect the ship design process since they directly influence developments process, fuel consumption costs, environmental impact from early stage. Parametric predictions power, based mainly on statistical regression models that are also ideal for computer programming, often performed during initial stages, providing rapid optimisati...