Journal of the Nigerian Society of Physical Sciences <p>Journal of the Nigerian Society of Physical Sciences is a peer-reviewed journal published quarterly (February, May, August &amp; November) by the Nigerian Society of Physical Sciences. It offers an exciting publication outlet for Physical Science reports.</p> en-US (Babatunde James Falaye (Ph.D.)) (Graxynet) Tue, 31 Dec 2019 00:00:00 +0000 OJS 60 Software Process Ontology: A case study of software organisations software process sub domains <p>In a domain like software process that is intensively knowledge driven, transforming intellectual knowledge by formal representation is an invaluable requirement. An improved use of this knowledge could lead to maximum payoff in software organisations which is key. The purpose of formal representation is to help organisations achieve success by modelling successful organisations. In this paper, Software process knowledge from successful organisations was harvested and formally modeled using ontology. Domain specific knowledge base ontology was produced for core software process subdomain, with its resulting software process ontology produced.</p> R. O. Oveh, O. Efevberha-Ogodo, F. A. Egbokhare Copyright (c) 2019 Journal of the Nigerian Society of Physical Sciences Mon, 16 Dec 2019 20:27:25 +0000 First-principles calculations of Fluorine-doped Titanium dioxide: A prospective material for solar cells application <p>This study focuses on the anatase TiO<sub>2</sub> doped Fluorine to investigate their structural and electronics properties using Density Functional Theory (DFT) within generalized gradient approximation (GGA) as implemented in Quantum ESPRESSO (QE). For the anatase TiO<sub>2 </sub>phase the calculated electronic band structures of pure TiO<sub>2</sub> and TiO<sub>2</sub> doped Fluorine nanocrystals are displayed along a high symmetry directions and the energy range of band structure is plotted from 0.0 eV to 3.9 eV , the energy separation between the bottom of the conduction band and the top of valence band occurred at the Γ and &nbsp;points, indicating that&nbsp; anatase TiO<sub>2 </sub>is an indirect band gap material with an approximate value of 2.30 eV energy gap, this value is consistent with previous DFT result. When F is added the band structure did not change much because fluorine element doping is conducive to the generation of Oxygen holes and enhances the mobility of effective electrons which can enhance the conductivity of the adsorbent substrate and improve the solar cell performance of the fluorine-doped TiO<sub>2</sub>. The band gap value obtained for F doped TiO<sub>2 </sub>was found to be 2.11 eV. The dopant formation energy of Fluorine is calculated to be -55.6 Ry which is equivalent to -756.5 eV.</p> A. Shamsudeen, Shuaibu S., S.G. Abdu, M. S. Abubakar, Abdullahi lawal Copyright (c) 2019 Journal of the Nigerian Society of Physical Sciences Mon, 16 Dec 2019 21:42:49 +0000 Solution of Fractional Order Equations in the Domain of the Mellin Transform <p>This paper presents the Mellin transform for the solution of the fractional order equations. The Mellin transform approach occurs in many areas of applied mathematics and technology. The Mellin transform of fractional calculus of different flavours; namely the Riemann-Liouville fractional derivative, Riemann-Liouville fractional integral, Caputo fractional derivative and the Miller-Ross sequential fractional derivative were obtained. Three illustrative examples were considered to discuss the applications of the Mellin transform and its fundamental properties. The results show that the Mellin transform is a good analytical method for the solution of fractional order equations.</p> Sunday Emmanuel Fadugba Copyright (c) 2019 Journal of the Nigerian Society of Physical Sciences Mon, 30 Dec 2019 11:46:34 +0000 Optimization of Method and Components of Enzymatic Fuel Cells <p><span style="background-color: #ffffff;">Enzymatic fuel cells produce electrical power by oxidation of renewable energy sources. An enzymatic glucose biofuel cell uses glucose as fuel and enzymes as biocatalyst, to convert biochemical energy into electrical energy. The applications which need low electrical voltages and low currents have much of the interest in developing enzymatic fuel cells. The cell was constructed using three different materials with different electrodes (Bitter leaf and Copper electrodes (BCu), Bitter leaf and Carbon electrodes (BC) and Water leaf and Carbon electrodes (WC)). The short circuit current and open circuit voltage were measured in micro-ampere (mu A) and milli-volt (mV) respectively at 30 minutes interval over the period of 12 hours (from dawn to dusk). The results which show that fuel cells constructed using bitter leaf with carbon electrode has the highest open circuit voltage, short circuit current and generated power of 162.8~mV, 1.65~ mu A and 268.62~nW respectively at 720~mins is obtained from the plots generated by the use of Microsoft Excel. The results show that all short circuit currents, voltages and powers generated increases with time and this is as a result of the exposure to solar radiation during the period of taking the measurement.</span></p> Ibukun Akinsola, Aderemi Babatunde Alabi, Muibat A Soliu, Taiye Akomolafe Copyright (c) 2019 Journal of the Nigerian Society of Physical Sciences Mon, 30 Dec 2019 12:03:28 +0000 Review of top notch electrode arrays for geoelectrical resistivity surveys <p align="justify"><span style="color: #000000;"><span style="font-family: Liberation Serif, serif;"><span style="font-size: medium;">The different arrangements of electrodes used in geoelectrical resistivity surveys and measurements are referred to as electrode arrays. In this review, we have revisited most of the widely used electrode arrays as well as the uncommon ones, which are nonetheless, useful in certain situations. This review has provided detailed information about eleven (11) of the top notch electrode arrays employable in our regular resistivity surveys, making it clear that in practice, the arrays that are most commonly used for 2-D imaging surveys are the Wenner, Dipole-Dipole, Wenner-Schlumberger, Pole-Pole and the Pole-Dipole arrays. They have their strengths and weaknesses. They are typically described by their signal-to-noise ratio. Their depth of investigation, ability for lateral location of the target and their mapping abilities of horizontal layers or steeply dipping structures among other factors determine which array to adopt.</span></span></span></p> Henry Ekene Ohaegbuchu, F. C. Anyadiegwu, P. O. Odoh, F. C. Orji Copyright (c) 2019 Journal of the Nigerian Society of Physical Sciences Sat, 25 Jan 2020 00:00:00 +0000