Siddhartha RaySiddhartha Ray is Professor and Head at the Department of Mechanical Engineering, Heritage Institute of Technology, Kolkata. He received his PhD from Jadavpur University and has published 26 research papers in national and international journals. He erved as Director of the National Institute of Technical Teachers' Training and Research, Kolkata, from 2006 to 2008. He has been teaching courses on machine design, strength of materials and manufacturing technology at undergraduate and postgraduate level for several years. His field of specialization is the design of machines and manufacturing processes. Read More Read Less