1. Mathematics, Dwaraka Doss Goverdhan Doss Vaishnav College, Arumbakkam, University of Madras, Chennai, India
2. Department of Electrical and Electronics Engineering, Vignan’s Foundation for Science Technology and Research, Guntur, India
3. Department of Building and Construction Techniques Engineering, Al- Mustaqbal University College, Hilla, Iraq
4. Al-Nisour University College, Baghdad, Iraq
5. Department of Doctoral Program, Faculty Economic and Business Universitas Sumatera Utara, Medan, Indonesia
6. Department of Mechanical Engineering, Faculty of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran