1. Department of Science and Humanities, Sri Krishna College of Technology, Coimbatore, Tamilnadu, India
2. Statistics Department, Faculty of Commerce, Al-Azhar University, Cario, Egypt
3. Quantitative Analysis Department, College of Business Administration, King Saud University, Riyadh, Saudi Arabia
4. Doctor of Pedagogical Sciences, Department of Chemistry Teaching Methods, Tashkent State Pedagogical University named after Nizami, Uzbekistan; ;
5. Department of Mechanical Engineering, Prince Mohammad Bin Fahd University, Al-Khobar, Kingdom of Saudi Arabia