1. University of Modern Sciences (UMS),Faculty of Engineering,Department of Communications and Electronics Engineering,Yemen
2. College of Computers and Information Technology, Taif University,Department of Computer Engineering,Taif,Saudi Arabia,21944
3. Red Sea University,Faculty of Engineering,Department of Electrical & Electronic Engineering,PortSudan,Sudan
4. Sudan University of Science and Technology,Faculty of Engineering,Department of Electronics Engineering,Khartoum,Sudan
5. Inter. Islamic Uni. Malaysia,Dept of Elec and Comp Eng,KL