1. Department of Chemical Engineering, Faculty of Engineering University of Malaya Kuala Lumpur Malaysia
2. Reliability & Improvement Process Engineering Department, Dyno Nobel Moranbah, 667 Goonyella Road, Moranbah Queensland Australia
3. Rapid and Professional Industrial Development and Service Pty. Ltd., Lucy Court, Bundoora Victoria Australia
4. Electrical Engineering Department, College of Engineering and Petroleum Kuwait University, P.O. Box 5969 Safat Kuwait