Due to its high machining precision, EDM technology is nowadays very important in the production of high-precision parts for various industries. The precision machined surface combination with ability machine circular surfaces brings, addition several advantages, some negatives. most significant negative this relatively low productivity as well overall efficiency. latter affected by many accomp...

The extent to which the structural reform of Peruvian electricity market in 1990s has improved technical efficiency levels distribution companies and whether some firm specific explanatory variables had influenced upon was analysed for first time using a second stage Tobit model study influence on efficiency. Some authors have argued that use regression is inappropriate DEA suggested other rece...

Thermoelectric materials are solid-state energy converters whose combination of thermal, electrical, and semiconducting properties allows them to be used to convert waste heat into electricity or electrical power directly into cooling and heating. These materials can be competitive with fluid-based systems, such as two-phase air-conditioning compressors or heat pumps, or used in smaller-scale a...

We report on the development of a new software package for image reconstruction in threedimensional Electrical Impedance Tomography (EIT). Designed for large-scale computations, the software includes mesh generation utilities, a simulator of the quasi-static electrical potential fields based on finite elements and regularized inversion algorithms. We describe in brief some of its main functions...

We investigate the performance of a linear electromechanical oscillator as an energy harvester of finite-bandwidth random vibrations. We derive exact analytical expressions for the net electrical power and the efficiency of the conversion of the power supplied by the noise into electrical power for arbitrary colored noise. We apply our results to the important case of exponentially correlated n...