In this investigation a suitable algorithm for the detection of cracks in the pressure vessels is presented. The equations of motion for the vessel are obtained and transferred into the wavelet space in a simplified form resulted from time and position approximations. The locations of cracks are randomly distributed in different regions of the structure to cover the whole geometry of the pressu...

In this paper, the problems of diagnostics of main propulsion marine engines are presented. Diesel or turbine engines are used for main propulsion of vessel power plants. Marine engine is a complex technical object. For the purpose of diagnostics it is convenient to divide the engine into several units – subsystems such as: piston –crank assembly; working medium exchange system, fuel supply sys...

On June 15, 2006, the United States President George W. Bush signed a proclamation that established the largest coral reef marine reserve in the world, the Northwestern Hawaiian Islands Marine National Monument (NWHI MNM). The NWHI MNM protects a chain of islands and atolls that encompass approximately 360,000 km 2 , including 11,650 km 2 of relatively undisturbed coral reef habitat that suppor...

Marine traffic is threatening cetaceans on a local and global scale. The Istanbul Strait is one of the busiest waterways, with up to 2,500 vessels present daily. This is the first study to assess the magnitude of short- and long-term behavioural changes of the endangered Black Sea harbour porpoises (Phocoena phocoena relicta) in the presence of marine vessels within the Istanbul Strait. Markov ...

Increased maritime vessel activity has adversely affected the conservation of marine environments. The mobility and diverse operations vessels increase difficulty spatial planning protected-area management. This study proposed a “source-pathway-carrier-impact-response” (SPCIR) model to describe ecological stress caused by (VES) constructed comprehensive assessment index system. method was appli...

Marine pollution has been a hot issue since 1990s around the world. Chua discussed marine pollution prevention and management in the East Asian Seas, concentrating on pollution caused by land and sea based sources [2]. The land based sources included destruction of coastal habitats, urban effluents discharge and coastal sand mining has resulted in serious coastline erosion. Sea based sources in...

Many existing phenomena in nature are considered new design ideas in various fields of industry. Bionics is the application of biological methods and systems found in nature to the study and design of engineering systems and modern technology. By performing bionic review, the researchers found the penguins by delivering air locked under their wings and creating air bubbles, the drag significant...

groups towards, or away from, the source vessel in the during phase. Interestingly, this behavioural Seismic surveys are widely used for exploration response was found in the control trials as well for oil and gas deposits below the sea floor. Despite as the active trials suggesting a response to the concern they may have an impact on whale behavsource vessel. iour, our knowledge of marine mamm...