—For designing maritime wireless transmission system, the radio propagation over sea surface needs to be known first. One of the distinct characteristics of maritime radio propagation is the impact of ship motions due to the fluctuation of sea waves. This paper establishes a radio propagation model with the integration of the effects of ship motions. Using such an integrated radio propagation ...

With the great progress in supercomputers and the numerical methods, the application of computational fluid dynamics are advancing rapidly in the field of ship hydrodynamics. And the dynamic overset grid method makes it possible for computing complex ship motions, e.g. ship self-propulsion with moving propellers and rudders. In the present work, CFD-based method coupling with dynamic overset gr...

Rather than adding up all cost items of ship operation in the traditional vessel-based approach, this paper develops a theoretical model to evaluate and decompose the total factor productivity (TFP) growth of the container shipping industry in Taiwan. The results show that scale economies and ship size economies play the dominant roles in improving TFP growth. Since 2006, the dominance of TFP g...

This article investigates the possibility of optimizing the organization of a ship as a highly complex technical system. In this sense, the existing relationship between technology and the human as a user is considered. Using the sociotechnical approach the aim is to identify the weaknesses in the existing technological and organizational ship’s system. Based on research conducted on the naviga...

Optimization of ship routing depends on several parameters, like ship and cargo characteristics, environmental factors, topography, international navigation rules, crew comfort etc. The complex nature of the problem leads to oversimplifications in analytical techniques, while stochastic methods like simulated annealing can be both time consuming and sensitive to local minima. In this work, a hy...

In very large seaports, where many ships are entering and leaving the port, collision avoidance is of utmost importance. A system used to quickly identify ships and to provide additional information is the Automatic Identification System (AIS). Data Mining methods may be employed to mine AIS trajectory data for patterns to create a model capable of predicting future events, which can be used as...

The paper investigates conditions and circumstances of the occurrence of emergencies during ship exploitation. The concept and different forms of emergencies are defined while conditions of their occurrence are simulated, as well as possible modes of prevention of their occurrence or development. On the basis of the results of the investigation covering 240 professional seamen an appropriate or...