Alok Barua, Ph. D. was a Professor in the Department of Electrical Engineering, IIT Kharagpur and Adjunct Professor in IIT Jammu. With more than 33 years of teaching experience on Instrumentation and Electronics he has worked on bioreactor, image processing, testing and fault diagnosis of analog and mixed signal circuits. He has delivered invited lectures in many different universities of USA, Europe and Far East. He worked as Visiting Professor/ Guest Professor/ Research Professor in University of Arkansas, USA, University of Karlsruhe, Frankfurt University, Yonsei University, Korea University and other institutions of the world. He authored several text and reference books on Instrumentation and VLSI.