1. Beni-Suef University,Faculty of Technology and Education,Department of Process Control Technology,Beni-Suef,Egypt
2. Egyptian Holding Company for Silo and Storage,Maintenance engineer,Beni-Suef,Egypt
3. Fayoum University,Faculty of Engineering,Department of Electrical Engineering,Fayoum,Egypt
4. Electronics Research Institute,Department of Power Electronics and Energy Conversion,Cairo,Egypt