Vol. 4 No. 2 (2020): June 2020

Mathematics

• First-Principle Study of the Structural, Electronic, and Optical Properties of Cubic Cesium Lead Halide Perovskites for Photovoltaic System

  Muhammad Waqas

  1-16

  • First-Principle Study of the Structural, Electronic, and Optical Properties of Cubic Cesium Lead Halide Perovskites for Photovoltaic System ²⁷⁴
  • 880

  DOI: https://doi.org/10.32350/sir.42.01

• A Comparative Study of FCSM, FSAW and TOPSIS Techniques using Triangular Fuzzy Numbers

  Muhammad Saeed, Fazal Dayan, Usman Ali

  17-30

  • A Comparative Study of FCSM, FSAW and TOPSIS Techniques using Triangular Fuzzy Numbers ⁷⁹
  • 162

  DOI: https://doi.org/10.32350/sir.42.02

• Role of Heavy Metals and Anthropogenic Activities in Water Contamination

  Shabbir Hussain, Khalida Nazir , Muhammad Amjad, Fauzia Kanwal, Umair Khan, Muhammad Riaz

  31-47

  • Role of Heavy Metals and Anthropogenic Activities in Water Contamination ¹³⁴
  • 273

  DOI: https://doi.org/10.32350/sir.42.03

• Analysis of COVID-19 by Means of Graph Theory

  Abaid ur Rehman Virik, Iqra Malik

  48-62

  • Analysis of COVID-19 by Means of Graph Theory ⁸¹
  • 105

  DOI: https://doi.org/10.32350/sir.42.04

• Decision Making in Mass Media Using Fuzzy Soft Sets

  Hamiden Abd El- Wahed Khalifa, Muhammad Saeed, Muhammad Kamran Aslam, Asad Mehmood, Sultan S Alodhaibi

  • Decision Making in Mass Media Using Fuzzy Soft Sets ⁸⁴
  • 133

  DOI: https://doi.org/10.32350/sir.42.05