R.R. Yadav, PhD, is Professor, Department of Physics, University of Allahabad. Earlier he served in Oil and Natural Gas Corporation (ONGC) as Geophysicist. He has published 90 research papers in the peer reviewed journals and won the best paper awards in 2004, 2008, and 2010 in the National Symposium on Acoustics (NSA), Ultrasonic Society of India (USI). Professor Yadav has been awarded by Prayag Gaurav Samman (2010) for the outstanding contribution in the field of education. He is also the recipient of INSA Teacher Award for the year 2012.
His research interests include nondestructive ultrasonic and thermal characterization of nanomaterials, semiconductors and development of nanomaterials for biomedical applications.
Devraj Singh, D.Phil., is Assistant Professor and Head in the Department of Applied Physics, Amity School of Engineering and Technology, New Delhi. With 13 years of teaching experience, he has to his credit 60 research articles in national and international journals of ultrasonics and 19 books including 2 books published by PHI Learning. He is life member of Ultrasonics Society of India, Materials Research Society of India, Indian Association of Physics Teachers, Acoustical Society of India and Metrology Society of India.
Sunil P. Singh, PhD, is Reader in Physics at Kamla Nehru Institute of Physical and Social Sciences, Sultanpur. He has published more than twenty research papers in international journals. His areas of interest are electronics, microwave and fibre optics.
Dharmendra K. Pandey, PhD, is Assistant Professor, Department of Physics, P.P.N. College, Kanpur. Earlier, he taught at Amity School of Engineering and Technology, New Delhi. Dr. Pandey has published more than thirty research papers in international journals of ultrasonics.