My supervisor, Prof. S. H. Upadhyay provided priceless encouragement, proficient guidance, heartfelt support, and inspiration during my research work. I desire to record his deep sense of gratitude for meticulous efforts in all technical and administrative issues. Without his heartfelt support, patience, and understanding, this exertion would not have been possible.
Dr. Sachin Patel
Assistant Professor, GEC, Patan, Gujarat