1. Physics Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
2. Department of Mechanical Design and Production Engineering, Faculty of Engineering, Zagazig University, P.O. Box 44519, Egypt
3. Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
4. Production Engineering and Mechanical Design Department, Faculty of Engineering, Tanta University, Tanta 31521, Egypt
5. Department of Industrial and Mechanical Engineering, Lebanese American University, P.O. Box 36 / S-12, Byblos, Lebanon