International Journal of Systems Science and Applied Mathematics

Volume 7, Issue 4, December 2022

  • A Modified Non-Linear Ordinary Differential Equations Model for Unemployment Dynamics on Ghana’s Economic Sectors

    Bridget Sena Borbor, Lewis Brew, Joseph Acquah

    Issue: Volume 7, Issue 4, December 2022
    Pages: 66-73
    Received: Aug. 23, 2022
    Accepted: Sep. 09, 2022
    Published: Oct. 11, 2022
    DOI: 10.11648/j.ijssam.20220704.11
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    Abstract: In this paper, we developed and analyzed a non-linear ordinary differential equations model for unemployment dynamics on Ghana’s Economic Sectors. In the modelling process, seven dynamic variables were considered namely: i) number of unemployed persons in the agriculture sector, ii) number of unemployed persons in the industry sector, iii) number o... Show More
  • Mathematical Modelling and Simulation of Nitrate Leaching into Groundwater

    Ochwach Jimrise, Okongo Mark, Ombaka Ochieng

    Issue: Volume 7, Issue 4, December 2022
    Pages: 74-84
    Received: Aug. 28, 2022
    Accepted: Oct. 28, 2022
    Published: Nov. 22, 2022
    DOI: 10.11648/j.ijssam.20220704.12
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    Abstract: Nitrate leaching into groundwater is a complicated process that involves a number of different biochemical transformations. These biochemical transformations include immobilisation, mineralization, nitrification, volatilization, crop absorption, and nitrate leaching into groundwater. Groundwater nitrate contamination is a developing challenge that ... Show More