Modeling and Applications in Operations Research

Jyotiranjan Nayak is a Professor in the Department of Mathematics at the Faculty of Science and Technology (IcfaiTech), IFHE, Hyderabad, India. Prior to this, he was Associate Professor at the Institute of Technical Education and Research, Siksha “O” Anusandhan University, Bhubaneswar, India, and has more than 32 years of teaching experience in undergraduate and postgraduate engineering studies. He taught the subjects like differential equations, vector analysis, complex analysis, linear algebra, numerical methods, optimization techniques, discrete mathematics, and advanced calculus at the undergraduate level. He taught postgraduate students algebra, cryptography, number theory, real analysis, topology, combinatorics, graph theory, and operations research. For Ph.D. students, he has delivered lectures on advanced computational mathematics, matrix algebra, and design of experiments at different universities, including Utkal University, Biju Patnaik University of Technology, Berhampur University, Siksha “O” Anusandhan, and ICFAI University. Besides, he has been a guest and visiting faculty at many other universities in the country. He obtained his Ph.D. degree from Utkal University in 2005. His research areas include non-convex programming, fuzzy optimization, optimal control, and topology optimization. He has published 12 research papers in leading national and international journals. He is also the former associate editor of The Journal of Orissa Mathematical Society. He was Vice-President of the Operational Research Society of India (ORSI), Bhubaneswar chapter. He is an executive member of the Orissa Mathematical Society (OMS) and a life member of the Indian Society for Technical Education (ISTE), Orissa Information Society (OITS), and Ramanujan Society of Mathematics and Mathematical Sciences (RSMSS).Shreekant Varshney is Assistant Professor in the Department of Mathematics, School of Technology (SoT), Pandit Deendayal Energy University, Gandhinagar, Gujarat, India. Before this, he worked as Assistant Professor in the Department of Mathematics at the Faculty of Science and Technology (IcfaiTech), IFHE, Hyderabad, India. He obtained his Ph.D. degree from the Birla Institute of Technology and Science Pilani, Pilani Campus, in 2020. He is actively involved in the research areas, namely queueing theory, machine repair problem (MRP), optimal control, reliability and maintainability, stochastic modeling, sensitivity analysis, evolutionary computation, statistical analysis, fuzzy set and logic, etc. He has taught undergraduate subjects such as linear algebra, differential equations, complex analysis, advanced calculus, numerical methods, and probability and statistics. He also has experience in teaching courses like research methodology, stochastic modeling, and introduction to queueing theory for Ph.D. students. Besides attending, presenting scientific papers, and delivering invited talks in FDPs, he has organized several workshops and symposiums. He has been awarded second prize in the academic writing competition organized by SIAM journal publishing. He has 13 research articles in journals of high repute, namely, Reliability Engineering and System Safety, Journal of Computational and Applied Mathematics, Quality Technology and Quantitative Management, Arabian Journal of Science and Engineering, etc. He is also a reviewer of many reputed journals. As a professional, he has visited IIRS (ISRO), CSIR-IIP, and WIHG.Chandra Shekhar, the Professor and Ex-HoD of the Department of Mathematics at BITS Pilani, India, is actively involved in research and teaching in the area of queueing theory, computer and communication systems, machine repair problems, reliability and maintainability, stochastic processes, evolutionary computation, statistical analysis, and fuzzy set and logic. He has expertise in the subjects of probability and statistics, differential equations, linear algebra, advanced calculus, complex variables, and statistical inference at the undergraduate level of teaching. He has taught real analysis, topology, cryptography, applied mathematics, computational mathematics, cybernetics, and many more at the post-graduation level. He has been a pioneer in evolutionary computation, Markovian and stochastic modeling, research methodology, and queueing analysis and its applications. Besides attending, presenting scientific papers, and delivering invited talks at national/international conferences and FDPs, he has organized many conferences, workshops, and symposiums as a convener and as an organizing secretary. The best research paper award has been bestowed at the international conference. He has 48 research articles in these fields in journals of high repute and has supervised two Ph.D. theses. Besides some book chapters in an edited book published by the publisher of international reputation, authorship of the textbook titled Differential Equations, Calculus of Variations and Special Functions and the edited book titled Mathematical Modeling and Computation of Real-Time Problems: An Interdisciplinary Approach is also to his credit. He is also a member of the editorial board and a reviewer of many reputed journals, academic societies and Doctoral Research Committee, advisory board, faculty selection committee, and the examination board of many governments and private universities, institutions, or research labs. As a professional, he has visited□ IIRS (ISRO), CSIR-IIP, NIH, WIHG, CPWD, NTPC, Bank of Maharashtra, and APS Lifetech.

• Chapter 1Ant colony optimization algorithm for the university course timetabling problem using events based on groupings of studentsRakesh P. Badoni, Sanjeev Kumar, R.P. Mohanty, and Ashirbad SarangiChapter 2Genetic Optimization and Their ApplicationsTusar Kanti Mishra, Vaibhav Bhartia, and B. K. TripathyChapter 3Different Variants of Unreliable Server: An Economic ApproachShreekant Varshney, Chandra Shekhar, Vivek Tiwari, and Kocherlakota Satya PritamChapter 4Multi-Objective Fuzzy Linear Programming Problem with Fuzzy Decision Variables: A Geometrical ApproachAdmasu Tadesse, M. M. Acharya, Manoranjan Sahoo, Srikumar AcharyaChapter 5On Approximation of Piecewise Linear Membership Functions and its Application to Solve Solid Transportation Problem with Fuzzy Cost CoefficientsPradip Kundu, and Manidatta RayChapter 6Profit Maximization Inventory Model for Non-Instantaneous Deteriorating Items with Imprecise CostsD. K. Nayak, S. K. Paikray, and A. K. SahooChapter 7A Fuzzy Inventory Model with Permissible Delay in Payments for Non- Instantaneous Deteriorating Items under InflationVipin Kumar, Amit Kumar, Chandra Shekhar, C. B. GuptaChapter 8Single and Multi-Objective Optimization Problems with Pentagonal Fuzzy NumberAnuradha Sahoo, Jayanta Kumar Dash, Ruchika MoharanaChapter 9Sensitivity Analysis of Fuzzy Linear Programming Problems with Symmetric Trapezoidal Fuzzy NumbersSanjaya K. Behera, and J. R. NayakChapter 10Constrained Effective Bit Selection Algorithm for Solving 0-1 Knapsack ProblemRajpal Rajbhar, and L. N. DasChapter 11A Transportation Model with Rough Cost, Demand, and SupplySubhakanta Dash, and S. P. MohantyChapter 12Impact of COVID-19 on the World EconomyAltaf Ahmad, Anjanna Matta, and Topunuru KaladharChapter 13Food Waste: Impact of Covid-19 on Urban and Rural AreasSurya Kant Pal, Mahesh Kumar Jayaswal, Subhodeep Mukherjee, Kriss Gunjan, Jyotirmai Satapathy, Simran SinghChapter 14A Conceptual Study of Association Factors Contributing to the Stress Level of Parents During the Pandemic Era in NCRNitendra Kumar, Pooja Singh, Santosh Kumar, Surya Kant Pal, Khursheed Alam, Mahesh Kumar Jayaswal