professor of electrical engineering, The University of Texas at Arlington

Michigan State University

Cankaya University, Professor at Institute of Space Sciences,Bucharest

professor emeritus, University of Rome "La Sapienza"

Professor of Complex Systems and Signal Processing

Professor of Electrical Engineering, University of New Brunswick

City University of Hong Kong (was with HK Polytechnic Univ.)

The City University of London

UCLA

Professor at UIC CASIA GDUT