A variety of seismic testing techniques rely on the use of seismic sources, detectors, or both, placed at some depth below the ground surface; these are often installed within fluid-filled boreholes. The interpretation of the records obtained in the course of such explorations requires a thorough understanding of how waves propagate in the borehole and its immediate vicinity. Depending on the d...

In this study, a solar cavity heat receiver for 36 m² two-axis parabolic dish collector has been designed, analyzed by employing computational fluid dynamics (CFD), manufactured in local workshop, and then tested experimentally on site. The is an open type with diameter of 624mm depth 665mm steel pipe spiral tubing helical at the bottom. concentrated sunlight focal point was found to be 200 mm ...

A 910MHz high efficiency RF transceiver for Wireless Body Area Network in medical application is presented in this paper. High energy efficiency transmitter and receiver architectures are proposed. In wireless body sensor network, the transmitter must have higher efficiency compared with the receiver because a large amount of data is sent from sensor node to receiver of the base station and sma...