Anand Chauhan is Associate Professor and Head of the Department of Mathematics at Graphic Era University, Dehradun, Uttarakhand, India. With more than 15 years of teaching and research experience, he has published more than 60 research papers in several national and international peer-reviewed journals. He has attended more than 30 national and international conferences, seminars and workshops. An author/coauthor of more than seven books, Dr. Chauhan is actively involved in teaching and research of operations research, mathematical modelling and optimization, numerical methods, discrete mathematics, probability and statistics and computer-based numerical and statistical technique. An active life member of the Indian Mathematical Society, Indian Science Congress Association and Operational Research Society of India, Dr. Chauhan has been reviewer of many national and international journals.Harish Chandra Joshi is Assistant Professor at the Department of Chemistry at Graphic Era University, Dehradun, Uttarakhand, India. He has done Ph.D. in Chemistry from Uttarakhand Technical University, Dehradun. With more than 9 years of teaching and research experience, he has been awarded the “Young Researcher in Chemistry”. With more than 25 research papers published in several SCI and Scopus-indexed journals, he also has published 4 books in addition to two chapters and two articles in scientific magazines. He has completed a research project funded by the International Project Indo-Russian DST RFBR. An active researcher in research on biofuel, biomass, natural product and environmental chemistry, Dr. Joshi is an active member of the Indian Association of Nuclear Chemists and Allied Scientists (BARC, India) and the American Chemical Society (USA).