Fouad A. S. Soliman - Prof. of Electronics and Computers Engineering Nuclear Materials Authority, Cairo, Egypt.Amira. A. Abo-talib - Lect. of Electronics, Physics Dept., Faculty of Women for Arts, Science and Education, Ain-Shams University.Doaa H. Hanafy - Faculty of Girls for Science, Art and Education, Ain-Shams University, Cairo, Egypt.