Change is something we all pay lip service to. Like flossing our teeth and jogging, we know we ought to do it, but prefer not to. For most people change means hard work, risk and the need to learn new ...

I have found the formla! Sorry I don’t know how to attach file here, so please click the link get my article: my blogger In this paper I given the formula of equivalent resistance for arbitrary ...

Casing wear is an increasingly typical problem that leads to a decrease in collapse resistance in deep wells, ultradeep wells, horizontal wells, and extended reach wells. Casing wear is an ...

I recently asked a group of 90 digital-board designers in Boston how many power-supply voltages were in their latest designs. Three, four, and five-voltage systems were quite common. The most was ...