Browsing by Author "Ackora-Prah, Joseph"

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    Fuel Scheduling by Linear Programming for Volta River Authority (VRA) - Aboadze Thermal Power Plant Project
    (1998-02-14) Ackora-Prah, Joseph
    By means of a Linear Programme (LP) model, an Optimal Fuel Scheduling Scheme has been obtained for the Aboadze Thermal Plant in Takoradi. The model which used weekly power output, Light Crude Oil, (LCO) delivery and inventory of the storage tanks as decision variables was solved using a computer code in Fortran. It was found out that LCO delivery to the two plants should be 25000 barrels to plant t1 and 15000 barrels to plant 2 in the first week, 23000 and 17000 barrels to plant 1 and plant 2 respectively in the second week. In the third week, the scheduled is 23000 and 18000 barrels of LCO to plant I and 2 respectively.. The inventory of the storage tanks at the end of the 3week period for the main problem was 18767 and 12169 barrels of LCO to plant 1 and plant 2 respectively. The optimal solution remained insensitive to 25% Tolerance in the model parameters.
  • Thumbnail Image
    Item
    Max-Plus Algebra for Genetic Algorithms
    (2012-08-18) Ackora-Prah, Joseph
    We investigate the redesigning of the general Genetic Algorithms (GAs) using concepts from max-plus algebra...
  • No Thumbnail Available
    Item
    Scattering of kinks in noncanonical sine-Gor Scattering of kinks in noncanonical sine-Gordon Model don Model
    (Turkish Journal of Physics, 2022) Takyi, Ishmael; Barnes, Benedict; Tornyeviadzi, Hoese Michel; Ackora-Prah, Joseph; 0000-0002-1217-0889; 0000-0002-0580-5655; 0000-0001-9488-9610
    In this paper, we numerically study the scattering of kinks in the noncanonical sine-Gordon model using Fourier spectral methods. The model depends on two free parameters, which control the localized inner structure in the energy density and the characteristics of the scattering potential. It has been conjectured that the kink solutions in the noncanonical model possess inner structures in their energy density, and the presence of these yields bound states and resonance structures for some relative velocities between the kink and the antikink. In the numerical study, we observed that the classical kink mass decreases monotonically as the free parameters vary, and yields bion-formations and long-lived oscillations in the scattering of the kink-antikink system. :
  • No Thumbnail Available
    Item
    Vacuum polarization energy of the kinks in the sinh-deformed models
    (Turkish Journal of Physics, 2021) Takyi, Ishmael; Barnes, Benedict; Ackora-Prah, Joseph; 0000-0002-1217-0889; 0000-0002-0580-5655; 0000-0001-9488-9610
    We compute the one-loop quantum corrections to the kink energies of the sinh-deformed 4 and 6 models in one space and one time dimensions. These models are constructed from the well-known polynomial 4 and 6 models by a deformation procedure. We also compute the vacuum polarization energy to the nonpolynomial function = 1 4 (1 − sinh2 .This potential approaches the model in the limit of small values of the scalar function. These energies are extracted from scattering data for fluctuations about the kink solutions. We show that for certain topological sectors with nonequivalent vacua the kink solutions of the sinh-deformed models are destabilized.