1. Department of Physics, Loyola College, Chennai India
2. Department of Physics, Scott Christian College, Nagercoil, India
3. Centre for GeoTechnology, Manonmaniam Sundaranar University, Tirunelveli, Tamil Nadu-India
4. Department of Mathematics, Vel Tech Rangarajan Dr. Sagunthala R & D Institute of Science and Technology, Chennai, Tamil Nadu, India