Rezq Naji Aljawfi - Department of Physics, Ibb University, Ibb 70270, Yemen
Mahmoud Abu-Samak - Al-Hussein Bin Talal University
Mohammed A. Swillam - American University in Cairo
Keun Hwa Chae - Advanced Analysis Center
Shalendra Kumar - King Faisal University
John A. McLeod - Soochow University