Ships must have good performance and economic value. The purpose of this research is to investigate the motion characteristics trimaran fishing boats using Computational Fluid Dynamics simulations. findings are intended improve a basic basis for operation at Fishing Ground. ANSYS AQWA describes ship response simulation effectively. For wave direction angle 1350, trimaran's roll reaction 10.131d...

A study concerning the effects of elevation and exposure of the spruce forests on defoliation levels of oriental spruce (Picea orientalis (L.) Link.) by Ips typographus L. was carried out during 2005 and 2006 in Artvin-Hatila National Park, Turkey Nine spruce stands were selected at 3 zones of elevations (1000-1350 m, 1350-1700 m and 1700-2000 m) and at different aspects to assess the role of e...

We propose a new type highly birefringent spiral photonic crystal fiber (PCF) for residual dispersion compensation in a wide range of wavelengths. The 2-D finite element method (FEM) with perfectly matched boundary layer (PML) is used for numerical simulation. The arrangement and diameter of circular air holes in the designed PCF has been tuned to offer almost flat dispersion profile with avera...