Flows around a wedge-shaped bow are simulated with the aim of investigating the wave breaking mechanism and small scale features of ship bow waves. The wedge geometry used in the experimental study of Waniewski et al. (2002) is chosen with the flow conditions at Re = 1.64×10 5 and Fr = 2.93. The bow wave structure, wave breaking process and air entrainment are studied. The predicted overall bow...

This paper proposes an ant colony optimization algorithm to assist railroad yard operational planning staff in their daily tasks. The proposed algorithm tries to minimize a multi-objective function that considers both fixed and variable transportation costs involved in moving railroad cars within the railroad yard area. This is accomplished by searching the best switch engine schedule for a giv...

The efficiency of container handling has got great improvement with the usage of the 40ft quay crane and the twin 40 ft yard crane. Reasonable bay planning strategies is necessary to reach the high handing efficiency by the twin 40 ft yard crane. This paper studies both bay planning and row planning for yard bay allocation. The models of bay planning and row planning are created, and the discre...

In order to improve the operating efficiency of mixture storage yard, the problem of multiple yard cranes scheduling (MYCS) must to be solved. The paper develops a multiple yard cranes scheduling MIP model in order to minimize the sum of trucks’ waiting cost and yard cranes’ moving cost. An important feature is that the future has to be taken into account: the interference between two yard cran...

the present study focuses on the formation of various types of yards in mosques and the elements that contribute to the respective process. the significance of the issue lies in that certain scholars have associated the yard in mosques with the concept of garden, and have not taken into account the elements that contribute to the development of mosque yards of various types. the theoretical fin...

The Panamanian-flagged ship MV Ever Judger, whose captain and the crew were all Chinese nationals, crashed into a pipeline belonging to PT Pertamina Refinery Unit 5 Balikpapan, breaking pipe dragging ship, causing contamination of sea by oil. Because this incident, we are interested in discussing: (1) How is criminal responsibility for perpetrators marine pollution due oil spills? (2) Who respo...

Ship recycling is gaining attention in Indonesia due to the increase end-of-life ships and uneconomical nationally flagged ships, considered a prospective source of economic development employment opportunity, yet conceivably poses threat health safety workers environment. There are international national regulations that govern ship-recycling activities ensure hazardous impacts industry minimi...