Swadesh Chaulya is a scientist at CSIR-Central Institute of Mining and Fuel Research (CSIR-CIMFR), Dhanbad, India. His fields of research include design and development of monitoring, control and automation systems for mines and hazardous areas; geotechnical and environmental studies; and application of wireless communication technologies in underground mines. He completed his Ph.D. degree in the year 1997 and has worked on various projects sponsored by different ministries of India and the World Bank, including the development of wireless communication system for underground mines, tracking and monitoring system using RFID tags for disaster management, slope failure monitoring technique using wireless sensor networking, feasibility assessment model for underground coal gasification, and tracking system for controlling illegal mining and coal transportation. Presently he is working in various wireless sensor networking, environmental monitoring and surveillance projects sponsored by MCIT, Government of India.G. M. Prasad is Senior Principal Scientist in Central Institute of Mining and Fuel Research (CSIR-CIMFR), Dhanbad, India. His areas of research are studies of various electrical and electronic properties of semiconductor materials, optical fiber communication, fiber-optic sensor development and communication system for mining and allied industries. He completed his Ph.D. degree in Applied Physics in the year 1997 from Indian School of Mines, Dhanbad. He has 24 years of experience in the field of communication, development of sensors, safe use of electrical and electronics equipment in mines, monitoring and up-gradation of various testing analysis and calibration related activities of the institute. He has worked on various research projects, sponsored by different ministries of India, such as development of optical fiber communication system for mines, slope failure monitoring technique using wireless sensor networking, feasibility assessment model for underground coal gasification, and tracking system for controlling illegal mining and coal transportation. Presently, he is working in various wireless sensor network, software development, and surveillance monitoring projects sponsored by MCIT, Government of India.