Nicolae TAPUS, Ph.D Nicolae TAPUS, Ph.DProfessor Computer Science and Engineering Dept. POLITEHNICA University of Bucharest Splaiul Independentei 313, Sector 6, postal code 060042 Bucharest, Romania Phone: +(40-744)-523 364 Fax: +(40-21)-402 93 33 Email: ntapus@cs.pub.ro