Dr. D. M. Patel working as a Principal of D.A. Degree Engineering and Technology, Ahemdabad, Gujarat. He has more than 20 years of experience in teaching, research, and administration. He has written 10 books in Electrical/Electronics Engineering/ area for B.Tech. / M.Tech. Students. He has published/presented more than 75 research papers in International Journals and Conferences and also supervised 4 Ph.D Students.