"Lucian Blaga" University of Sibiu Faculty of Engineering Manufacturing Science Department 4 Emil Cioran Street RO-550025 Sibiu ROMANIA Tel.: +40 269 216062 / 430, 431 E-mail: conf.mse2009@ulbsibiu.ro Prof. Paul Dan BRINDASU, Ph.D. Prof. Livia BEJU, Ph.D.