African Scientific Reports
https://asr.nsps.org.ng/index.php/asr
<p><em>African Scientific Reports</em> is a peer reviewed, open access, inter- and multidisciplinary scientific journal that is dedicated to expanding access to African research, increasing intra-African scientific collaboration, and building academic research capacity in Africa. The journal aims to provide a modern, highly-visible platform for publishing pan-African research and welcomes submissions from all areas of the natural sciences, psychology, medicine and engineering. With the idea that making research openly available to the public promotes better global knowledge exchange, this journal offers direct open access to its contents, i.e., all the articles published in this journal are free to access immediately from the date of publication. ASR is available in print and online. The language used in this journal is English.</p> <p> </p>Nigerian Society of Physical SciencesenAfrican Scientific Reports2955-1625Assessing the physical and geotechnical properties of subsoils within an active municipal solid waste dumpsite for secured future urban growth
https://asr.nsps.org.ng/index.php/asr/article/view/184
Section: GEOSCIENCES SECTION<br />
Categories: ENGINEERING, GEO SCIENCES, PHYSICS<br />
Keywords: Near surface soil, Dumpsite, Mechanical properties, Sampling depth, Foundation materials<br />
Disciplines: Engineering, Geo sciences, Physics<br />
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<p class="p1">This study attempts to investigate the geotechnical properties of subsoils in an active Dumpsite (DS) within the basement complex area of Abeokuta, Nigeria with a view to assess its suitability as a foundation/filling material. Sixteen (16) composite soil samples were collected from four different parts of the DS at varied depths of 0.0 - 0.5, 0.5 - 1.0, 1.0 - 1.5, and 1.5 - 2.0 m. The soil properties considered are particle size distribution, Specific Gravity (SG), permeability, Shear Strength (SS), Maximum Dry Density (MDD), Optimum Moisture Content (OMC), Natural Moisture Content (NMC) and Atterberg limit (AL) indices. Results show that the assessed soil samples are sandy soils with less than 30% clay content. The ALs test revealed that analysed samples had low Plasticity index (PI) (0.20 - 11.96%), low values of Plastic Limit (PL) and Liquid Limit (LL) of (14.19 - 18.83% and 17.52 - 26.15%, respectively). The MDD values ranged from 1.07 to 1.76 g/cm<span class="s1">3 </span>while the NMC and OMC were <25% and <18%, respectively. The permeability coefficients ranged from 1.53 x 10<span class="s1"><sup>−4</sup> </span>to 8.49 x 10<span class="s1"><sup>−3</sup> </span>cm/s, indicating moderately permeable soil while the SS results (ranging from 3.4 to 12.5 KPa) indicate low cohesive capacity soils. The tested soils are mildly suitable for foundation/filling materials. Further study is needed to study the trend of alteration of soil properties with depth on dumpsite soil located on other geological formations.</p>
GEOSCIENCES SECTIONENGINEERINGGEO SCIENCESPHYSICSNear surface soilDumpsiteMechanical propertiesSampling depthFoundation materialsEngineeringGeo sciencesPhysicsSaheed Adekunle GaniyuOluwaseun Tolutope OlurinSulaimon Yinka MakanjuolaAnthony OkehAbiodun Oluwatoyin SalawuRasaq Akanji Lasisi
Copyright (c) 2024 Saheed Adekunle Ganiyu, Oluwaseun Tolutope Olurin, Sulaimon Yinka Makanjuola, Anthony Okeh, Abiodun Oluwatoyin Salawu, Rasaq Akanji Lasisi
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2024-05-302024-05-3018418410.46481/asr.2024.3.2.184On topological indices and QSPR analysis of some drugs used for treating Coronavirus patients
https://asr.nsps.org.ng/index.php/asr/article/view/80
Section: MATHEMATICAL SCIENCES SECTION<br />
Categories: MATHEMATICAL SCIENCES<br />
Keywords: Energy, Eigenvalues, Molecular structures, QSPR<br />
Disciplines: Chemical Graph Theory<br />
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<p class="p1">A topological index is a real number obtained from the molecular graph structure. It can predict the physicochemical and biological properties of many anticoronavirus drugs. In this article, the topological index of some drugs for the treatment of coronavirus was computed using the Wiener-Hosoya eigenvalues of the molecular structure of hydroxychloroquine, chloroquine, camostat, nafamostat, remdesivir, and lopinavir compounds, and the Quantitative Structure Property Relationship (QSPR) study of some properties: Boiling point, Molar weight, Flash point and Enthalpy were investigated. It was observed that the regression model value r is more than 0.6 and p value shows less than 0.05.</p>
MATHEMATICAL SCIENCES SECTIONMATHEMATICAL SCIENCESEnergy, Eigenvalues, Molecular structures, QSPRChemical Graph TheoryHassan IbrahimDeborah Abolape AkwuReza Sharafdini
Copyright (c) 2024 Hassan Ibrahim, Deborah Abolape Akwu, Reza Sharafdini
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2024-05-312024-05-31808010.46481/asr.2024.3.2.80Approximate solution of time-fractional non-linear parabolic equations arising in Mathematical Physics
https://asr.nsps.org.ng/index.php/asr/article/view/176
Section: MATHEMATICAL SCIENCES SECTION<br />
Categories: MATHEMATICAL SCIENCES<br />
Keywords: Iterative method, Gamma function, Parabolic equation<br />
Disciplines: Applied mathematics, Numerical Method<br />
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<p class="p2">In this paper, we studied and analysed a new iterative method for solving time-fractional non-linear equations by obtaining approximate solutions to the Allen-Cahn, Newell-Whitehead, and Fisher equations by putting the parameter \alpha = 1 and varying the values of \gamma, \phi, and \tau. These three equations were derived from the general non-linear dynamical wave equations when the constants therein assumed certain specific values. Obviously, from the tabulated results, we observed that the approximate solution for each example compares favourably with the existing results in the literature; therefore, the proposed scheme is effective and accurate in solving Allen-Cahn, Newell-Whitehead, and Fisher equations. All the computational work was done using Mathematica, and all the graphs were plotted using MATLAB.</p>
MATHEMATICAL SCIENCES SECTIONMATHEMATICAL SCIENCESIterative methodGamma functionParabolic equationApplied mathematicsNumerical MethodK. IssaR. A. BelloM. H. Sulaiman
Copyright (c) 2024 K. Issa, R. A. Bello, M. H. Sulaiman
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2024-05-312024-05-3117617610.46481/asr.2024.3.2.176Bathymetric survey and volumetric analysis of Bakolori dam reservoir North West Nigeria
https://asr.nsps.org.ng/index.php/asr/article/view/154
Section: GEOSCIENCES SECTION<br />
Categories: GEO SCIENCES<br />
Keywords: Bathymetric Survey, Capacity Loss, Siltation Volume<br />
Disciplines: Hydrogeology, Environmental Geology, Geology<br />
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<p class="western" style="line-height: 104%; margin-bottom: 0.26cm;">Many approaches have been devised for measuring water depth in bathymetric surveys, which are used to assess sediment deposited directly in lakes and reservoirs. This technique is mostly used to calculate the reservoir's capacity and the amount of sedimentation that occurs there. The results of the volumetric analysis and bathymetric survey of the Bakolori Dam reservoir, which is situated in Northwestern Nigeria, are presented in this work. During this investigation, the differential Global Positioning System receiver (GPS), automatic level measuring tool, echo-sounder, and engine boat were utilized. ArcGis 10.0 was used to analyze the acquired data. In order to evaluate the reservoir capacity loss during the Bakolori reservoir's operating period as of 1983, the designed computed reservoir capacity was compared with the current bathymetry survey. At a spillway crest elevation of 334 meters above mean sea level (amsl), the reservoir's initial capacity is reported as 430 million cubic meters (MCM). However, the capacity has since been revised to 291 meters at the same level, with a volume change of 139,269,495 m3. As a result, the reservoir's volume changed by approximately 139 MCM during a thirty-five (35) year period of service, representing a loss of storage capacity, while the annual siltation rate was around 3,979,128 m3/a. This indicated that 33% of the reservoir's storage capacity had silted up. This is demonstrated by the aquatic weeds that have grown to a height of 334.21 meters on the lake's surface, rising from the lakebed. Therefore, to prevent total siltation, the dam reservoir needs to be adequately dredged.</p>
GEOSCIENCES SECTIONGEO SCIENCESBathymetric SurveyCapacity LossSiltation VolumeHydrogeologyEnvironmental GeologyGeologyAhmad Mahi Shuaibu
Copyright (c) 2024 Ahmed Mahi Shuaibu
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2024-06-092024-06-0915415410.46481/asr.2024.3.2.154