surface and subsurface water collection in small seasonal rivers is very crucial, particularly in dry seasons. in this study a type of intake is introduced which acts as a river drainage network. an experimental model of the subsurface intake was constructed and the effective parameters such as upstream discharge, installation depth, and drain intervals were evaluated. the results showed that t...

in Chinese. Foreign collaborations have also been funded by western agencies, including the Royal Society, but in these cases the funding is paid out to her foreign collaborators. A decade after what must have appeared as a very brave move at the time, Perrett is still enthusiastic about the opportunities she enjoys in Beijing. “It’s an exciting time for science in China!” she says. “The fact t...

A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...

The flow patterns in a street are investigated the case of exchanges with sewer. experimental facility includes one and circular pipe located below eventually connected by or two drains. Compared to runs without drain drainage, overflow creates strong (up 50%) increase streamwise velocity street, particularly, near bottom, high degree turbulence close drains downstream. For from drain, rearrang...

Abstract Artificial neural networks are a tool for modeling of nonlinear systems in various engineering fields. These effective tools the systems. Each artificial network includes an input layer, output layer between which there one or some hidden layers. In each several processing elements neurons. The neurons independent variables understudy issue, and its dependent variables. system, through...

Abstract This paper describes experimental results on the correlation between current collapse and electroluminescence observed under high drain bias conditions in AlGaN/GaN HEMTs with high breakdown voltages over 1000 V. The electroluminescence characteristics were categorized into 2 groups: one from the drain edge with a strong white-appearance emission and the other from the whole gate-to-dr...

UNLABELLED BACKGROUND Thyroidectomy is a common surgical procedure, after which drains are placed routinely. This study aims to assess the benefits of placing postoperative drains, its complications and affects on postoperative stay, in thyroid lobectomy. METHODOLOGY Randomized Clinical Trial of 60 goitre patients undergoing lobectomy was conducted at Civil Hospital Karachi, during July'11...