**Acknowledgements**

Dr. Samrat D thank TEQIP CELL, Visvesvaraya Technological University (VTU) for receiving fund under Competitive Research Grant with Ref. No. VTU/ TEQIP 3/2019/321.

Dr. Samrat D thank Dr. Prasad B E, Dr. Rudresh Kumar K J, RV Institute of Technology and Management and Dr. Ramakrishnappa Thippeswamy, Dr. Suresh Kumar K from BMS institute of Technology and Management for the useful discussion and inputs in fine tuning the book chapter.

Dr. Banuprakash G thank VGST Grant (GRD No. 532) Under CISEE Scheme (2016-17).
