1. HANI M. IBRAHEM:
Mathematics & Computer Science dept. Faculty of science, Menoufiya University, Egypt; Faculty of Science and Computer Engineering, Taibah University, Yanbu, KSA
2. MAHMOUD ELMEZAIN:
Computer Science Division, Faculty of Science, Tanta University, Tanta, Egypt; Faculty of Science and Computer Engineering, Taibah University, Yanbu, KSA
3. SAHAR SHOMAN:
Mathematics & Computer Science dept. Faculty of science, Menoufiya University, Egypt