Battery powered cost effective TDS logger intended for water testing.

International audienceThe paper presents a cost-effective device designed for measuring and monitoring the TDS (total dissolved solids) level of drinkable, surface (lakes, rivers) and/or industrial waters. Providing a first reading of potential water pollutions, the device is dedicated to the sectors of environment and consumer protection. The device was implemented and a series of continuous measurements is depicted, discovering some abnormalities in the quality of Targoviste city water utility

COMPANY’S INCREASING PERFORMANCES THROUGH SOCIAL RESPONSIBILITY PROGRAMMES (SR) TOWARDS EMPLOYEES

Socially responsible actions of the companies can be performed not only to society but also to its employees, which can help increase the company’s performance. In this article we have identified various ways of achieving social responsibility programmes to employees, being outlined a number of benefits both for the company and for its employees, too.social responsibility, company performance, human resources manager, sustainable development, SMEs.

Design and modeling of a piezoelectrically actuated microvalve.

International audienceIn this paper, we propose and model a new microvalve design based on a unimorph piezoelectric bending cantilever. When the piezoelectric structure is electrically driven, the valve opens with precise angles allowing smooth flow control. In order to understand the whole system dynamic behavior, a physical model is developed. While the developed model is strongly nonlinear