The objective of this paper is to present a centrifugal pump control system driven by a single-phase induction motor (SPIM) that is supplied by a photovoltaic generator. The study system consists of a ...

Fitness experts explain the differences between the treadmill and rower, and how to chose the correct cardio machine for your ...

A hydraulic ram is a clever device invented over 200 years ago that can pump water uphill with no other external source of power except for the water flowing into it and there is a way to take ...