American Journal of Science, Engineering and Technology

Volume 7, Issue 4, December 2022

  • Modelling Energy Efficiency for Voyage of Chemical Tanker Vessel (CTV) Operating in Calm Weather Condition

    Collins Emeka Amadi, Kelvin Datonye Henry Bob Manuel, Daniel Tamunodukebipi, Onuh Chukwuka Humphery

    Issue: Volume 7, Issue 4, December 2022
    Pages: 130-135
    Received: 5 September 2022
    Accepted: 1 October 2022
    Published: 28 October 2022
    DOI: 10.11648/j.ajset.20220704.11
    Abstract: An increased study into improving ship energy management has been prompted by worldwide worries about the high cost of bunker fuel. The study present both empirical and analytical approaches considered in predicting the vessel fuel consumption and the hull resistance of a chemical tanker vessel on a voyage from Escavos, Delta to Lagos port (Apapa) ... Show More
  • Performance Analysis of Non Linear Field Oriented Controlled Induction Motor Drive for Improved Performance - Effect of Intermittent Loading

    Ekwuribe James Michael, Okoro Christopher Kalu

    Issue: Volume 7, Issue 4, December 2022
    Pages: 136-146
    Received: 1 October 2022
    Accepted: 19 October 2022
    Published: 29 October 2022
    DOI: 10.11648/j.ajset.20220704.12
    Abstract: Attempt has been made in previous works to improve the steady state and dynamic performances of the vector controlled induction motor drives. The Input-output (I/O) linearization and decoupling technique which are based on the concepts of differential geometry and vector control has been used in the decoupling of speed or torque from the flux of in... Show More
  • On the Evaluation of the Neural Network Khartoum Geoid Model

    Kamal Abdellatif Sami, Ammar Mohammed Maryod Aborida

    Issue: Volume 7, Issue 4, December 2022
    Pages: 147-151
    Received: 15 September 2022
    Accepted: 20 October 2022
    Published: 4 November 2022
    DOI: 10.11648/j.ajset.20220704.13
    Abstract: This study was carried out to establish and evaluate an Artificial Neural Networks (ANN) geoid model for the Khartoum State. In the first stage the geometrical geoid heights were obtained from the differences between observed ellipsoidal heights and known orthometric heights of 48 geodetic Ground Control Points (GCP) in the study area. This followe... Show More
  • Numerical Analysis of Circular, Square, and Rectangular Composite Columns Under Axial and Torsional Loads

    Marsimoyi Terefe Bango

    Issue: Volume 7, Issue 4, December 2022
    Pages: 152-166
    Received: 14 October 2022
    Accepted: 14 November 2022
    Published: 23 November 2022
    DOI: 10.11648/j.ajset.20220704.14
    Abstract: This paper presents a numerical analysis of different sections of circular, square, and rectangular composite columns subjected to axial and torsional loads to characterize the composite columns section performance for different purposes of construction. To accomplish the objective of this study, a parametric examination was conducted. Nine differe... Show More