In this study, numerical analysis and experiments were performed to analyze the viscous damping effect according shape of chamber skirt breakwater-linked inclined oscillating water column wave energy converter. Experiments conducted using a two-dimensional mini tank verified by comparing results computational fluid dynamics analysis. Pointed rounded skirts modeled compare when incident waves en...

The recently developed Spring Back Reflector has low stiffness in the deployed configuration. A general method of stiffening this type of reflector without changing its folding properties is presented. The stiffening is achieved by adding a conical skirt around the edge of the dish; this skirt snaps elastically when the dish is folded. The paper concludes that it is possible to design spring ba...

The interest in reducing emission and improving engine efficiency has become a major push in industry, due to upcoming stricter regulations. A great deal of attention has been given to the frictional losses due to piston and liner interaction, as they represent a significant portion of the total mechanical losses. This thesis work focuses on further development and application of an existing mo...

BACKGROUND Drinking raw date palm sap is a risk factor for human Nipah virus (NiV) infection. Fruit bats, the natural reservoir of NiV, commonly contaminate raw sap with saliva by licking date palm's sap producing surface. We evaluated four types of physical barriers that may prevent bats from contacting sap. METHODS During 2009, we used a crossover design and randomly selected 20 date palm s...

The purpose of this paper is to evaluate the effect of different methods for improving the temperature gradient of a specified gasoline engine piston. With a robust FE based software, 3D thermal analyses have been carried out for the piston model. Unlike previous studies, the effects of both fully and locally ceramic layers on the crown top surface were considered. It was found that a fully cer...

Extensive aortic valve endocarditis requires thorough debridement of the paravalvular tissue, and reconstruction of the destroyed aortic root can be technically difficult. In the present report, we describe a simple technique for aortic root reconstruction. In this technique, a doughnut-shaped bovine pericardial sheet (skirt) is attached to the proximal end of a valved conduit and then sewn ont...

This paper presents a hybrid meta-heuristic algorithm called multiple start guided neighbourhood search (MSGNS) algorithm for combinatorial optimisation which combines the good features of popular guided local search algorithms like simulated annealing and tabu search. It has been organized as a multiple start algorithm to maintain a good balance between intensification and diversification. The...