Rehman, S., Institute of Chemical Sciences, University of Peshawar, Peshawar, Pakistan Rehman, S., Cereal Crops Research Institute, Pir Sabak, Peshawar, Pakistan Rehman, S. U., Department of Mathematical Sciences, University of Karachi, Karachi, Pakistan Rehman, S. U., Department of Mathematics, University of Karachi, Karachi, Pakistan Rehman, S. U., Institute of Chemical Sciences, University of Peshawar, Peshawar, Pakistan Rehman, S.U., Oil and Gas Development Company Limited, Islamabad Rehman, Sidra, School of Politics and International Relations, Quaid-i-Azam University, Islamabad Rehman, T., Department of Geological Engineering, University of Engineering and Technology, Lahore, Pakistan Rehman, W., COMSATS Institute of Information Technology, Lahore, Pakistan Rehman, Z., Department of Computer Science and Engineering, University of Engineering and Technology, Lahore, Pakistan Rehmat, M. A., Department of Computer Science and Engineering, University of Engineering and Technology, Lahore, Pakistan Riaz, A., Lahore College for Women University, Lahore Riaz, M., Pakistan Institute of Engineering and Applied Sciences (PIEAS) P.O. Nilore, Islamabad, Pakistan Riaz, S., Centre of Excellence in Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore, Pakistan Riaz, S., Centre of Excellence in Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore, Pakistan. Rizwan, A., Department of Industrial Engineering, King Abdulaziz University, Jeddah, Saudi Arabia Rizwan, M., Computer Engineering Department, University of Engineering and Technology, Taxila, Pakistan Robinson, A., School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K Roohi, S., Isotope Production Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan Roy, Pinaki, Durgapur Government College, Durgapur, West Bengal, Pin Code: 713214, INDIA Rullah, Nas, Nuclear Institute of Agriculture, Tandojam-70060, Pakistan.