Digital twins for smart cities and villages / edited by Sailesh Iyer, Rai School of Engineering, Rai University, Ahmedabad, Gujarat, India, Anand Nayyar, School of Computer Science, Duy Tan University, Da Nang, Viet Nam, Anand Paul, Department of Biostatistics and Data Science, The School of Public Health, The Louisiana State University Health Sciences Center New Orleans, United States, Mohd Naved, Jaipuria Institute of Management, Noida, Uttar Pradesh, India.