Dr. Nishant K. Singh is an Associate Professor at Harcourt Butler Technical University, Kanpur, Uttar Pradesh, India. He earned his PhD from IIT, Dhanbad, masters in Production Engineering and B. Tech in Mechanical Engineering, Delhi College of Engineering. He has written more than 130 research articles in well-known international journals and Serves as the Reviewer and Editorial Member in peer-reviewed Journals and Conferences. His research interests include Tribology, Composites, Micro-manufacturing and Non-conventional machining processes. He has written 5 books with International Publishers CRC Press, Nova Publishers, River Publishers.

Prof. Rajesh Kumar Verma is working on the post of Professor in the Department of Mechanical Engineering, School of Engineering, Harcourt Butler Technical University (HBTU) Kanpur India, (UP Govt. Technical University). He received his Ph.D. (Engineering) from Jadavpur University, Kolkata, India. He has published over 150 peer-reviewed articles in refereed international journals and conference proceedings, being cited more than 250times and featured by an h-index of 9 according to the Google Scholar database. He has developed various nanomaterials for structural applications and proposed hybrid optimization modules recognized by multiple peer-reviewed journal publishers like Elsevier,Springer, Taylor and Francis, Sage, WSPC, etc.

Dr. Virendra Kumar is working as Assistant Professor in the Department of Mechanical Engineering of Harcourt Butler Technical University, Kanpur, India. He obtained his Ph.D. in Thermal Engineering from the Indian Institute of Technology Delhi, India. Prior to joining Harcourt Butler Technical University, Kanpur, India. His research interest includes ejector design and analysis, thermo-fluids, solar Energy, PV waste recycling and reutilization. He is also editorial board member of Scientific Reports, Discover Applied Sciences and Discover Mechanical Engineering

Prof. J. Paulo Davim is a Full Professor at the University of Aveiro, Portugal. He received his Ph.D. degree in Mechanical Engineering in 1997, M.Sc. degree in Mechanical Engineering (materials and manufacturing processes) in 1991, Mechanical Engineering degree (5 years) in 1986, from the University of Porto (FEUP), the Aggregate title (FullHabilitation) from the University of Coimbra in 2005 and the D.Sc. (Higher Doctorate) from London Metropolitan University in 2013. He has more than 30 years of teaching and research experience in Manufacturing, Materials, Mechanical and Industrial Engineering, with special emphasis in Machining & Tribology. He has published as editor (and co-editor) more than 200 books and as author (and co-author) more than 15 books, 100 book chapters and 500 articles in journals and conferences.