1. Department of Physics, JNTUH College of Engineering Sultanpur, Sultanpur (V), Pulkal (M), Sangareddy-Dist. Telangana State, India
2. Department of BS&H, Vignan Institute of Technology & Science, Yadadri-Bhuvanagiri-Dist., Telangana State, India
3. Department of Physics, Osmania University, Hyderabad, Telangana State, India