1. Department of Computer System & Technology, Faculty of Computer Science & Information Technology Building; University of Malaya; 50603 Kuala Lumpur Malaysia
2. Department of Computer Sciences, College of Education for Pure Sciences-Ibn Al-Haytham; University of Baghdad; 10071 Baghdad Iraq
3. Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment; Universiti Kebangssan Malaysia; 43600 Bangi Selangor Malaysia
4. School of Electrical & Computer Engineering; Purdue University; West Lafayette IN 47906 USA