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Journal of Nigerian Society of Physical Sciences
Scopus
ISSN 2714-2817 · Nigerian Society of Physical Sciences · 538 artikel di indeks
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Effect of a moving thermal load in a modified couple stress medium with double porosity and hyperbolic two-temperature theory
In this study, a two-dimensional thermoelastic problem is investigated within the framework of Modified Couple Stress Theory (MCST) incorporating double porosity and governed by the Hyperbolic Two-Temperature (HTT) model under the influence of a moving thermal source. The governing equations are…
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Artikel Jurnal Teks lengkap
Effect of radial non-uniformity on mechanical response of functionally graded discs
This study investigates the stress distribution in functionally graded material (FGM) discs composed of compressible and incompressible constituents, subjected to nonhomogeneity and external loading. Analytical results are presented for radial and tangential stresses as functions of the radii ratio…
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Computational optimization of auctioneer revenue in modified discrete Dutch auctions with cara risk preferences
This research presents a computational optimization framework designed to maximize auctioneer revenue in modified discrete Dutch auctions by explicitly incorporating bidders’ risk preferences---modeled independently of wealth through the Constant Absolute Risk Aversion (CARA) utility…
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Concentrations of heavy metal content in indoor dust and potential exposure in preschool children
Indoor dust serves as a medium for the deposition of heavy metals, and young children's rapid physical growth and hand-to-mouth behavior expose them to the impacts of heavy metals. This project aimed to measure the concentrations of heavy metals in classroom dust from the selected preschools in…
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Integrated data-driven credit default prediction in Uganda using machine learning models
The prediction of credit facility defaulters is quite a challenge in Uganda, particularly for those without a formal banking history. Existing prediction models cater for prediction using conventional banking records which is not sufficient. The use of integrated data to cater for the unbanked…
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Computation of vibrational partition function: a comparative analysis between Poisson summation and classical limit
The computation of partition function (Z) is the bedrock of the study of statistical mechanics as it plays a significant role in the thermodynamic properties (TP) where microscopic properties are connected to macroscopic properties. Several studies have reported TP via the Z using one of the…
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Evaluation of radiation shielding and mechanical properties of palm nut shell ash modernized concrete: a comparative analysis
Gamma radiation poses health and environmental risks, creating the need for sustainable, low-cost, and eco-friendly shielding materials. In this study, we modified ordinary concrete with palm nut shell ash (PNSA) to examine its mechanical, physical, and gamma ray shielding performance. The adopted…
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Structural, electronic and optical properties of theFeAs(1-x)La(x) ternary alloys: a first principles calculations
This study investigates the structural, electronic, and optical properties of FeAs(1-x)La(x) alloys (x = 0, 0.25, 0.5, 0.75, 1) using the FP-LAPW method within the framework of density functional theory (DFT). The lattice parameter, bulk modulus, and its derivative were determined through…
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Synergistic intelligence: a novel hybrid model for precision agriculture using k-means, naive Bayes, and knowledge graphs
This study presents a novel hybrid knowledge discovery model integrating K-Means clustering, Naive Bayes classification, and Knowledge Graph technology to address interpretability and data heterogeneity challenges in precision agriculture. The proposed framework first applies K-Means to segment…
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Onchocerciasis control via Caputo-Fabrizio fractional dynamics: a focus on early treatment and vector management strategies
The socio-economic burdens of onchocerciasis have prompted the formulation of several mathematical models to better comprehend the epidemic. However, existing models either use integer-order derivatives, which often do not capture the memory and non-local effects seen in infectious diseases, or…
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Velocity-in/dependent double folding analysis of 12C + 12C elastic scattering cross section at different energies
This study investigates the elastic scattering cross sections for 12 C + 12 C over a wide range of incident energies from 78.85 to 420 MeV using the velocity–dependent São Paulo Potential version 2 (SPP2) and the velocity–independent Brazilian Nuclear Potential (BNP) within the optical-model-based…
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Environmental and health risk assessment of cadmium, zinc,iron, copper in crops and soil at Enugu State dumpsite
Contamination of soils and food crops around the Ugwuaji dumpsite in Enugu State, Nigeria was evaluated. Zinc (Zn), copper (Cu), iron (Fe), and cadmium (Cd) were determined in seventy-three (73) samples, which included pre-planting and post-harvest soils, control soils, ash from the New Artisan…
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On graded Jgr-2-absorbing primary submodule
This paper introduces the concept of graded Jgr-2-absorbing primary submodules, a new intermediate structure in graded module theory. Motivated by the need to extend and unify classical notions such as graded prime and graded primary submodules, the study develops a comprehensive framework…
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Hybrid deep belief network and fuzzy clustering approach for geothermal prospectivity mapping in northeastern Nigeria using magnetic and landsat data
Nigeria faces persistent energy supply challenges, particularly in its northeastern region, where grid access is limited and dependence on fossil fuels undermines sustainability goals. Although the National Renewable Energy Action Plan (NREAP 2015–2030) outlines ambitious targets for renewable…
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Contamination levels, occurrence pattern and associated risk of organophosphate pesticide residues in spices and herbs sold in southern Nigeria
This study investigated the contamination levels, occurrence pattern and associated health risks of organophosphate pesticide residues in spices and herbs sold in southern Nigeria. Fifty-two samples of commonly consumed spices and herbs were purchased from multiple locations in southern Nigeria and…
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Artikel Jurnal
A hybrid IFR-IDY conjugate gradient algorithm for unconstrained optimization and its application in portfolio selection
This study introduces the Improved Fletcher-Reeves (IFR)-Improved Dai-Yuan (IDY) hybrid conjugate gradient method, which combines the strengths of the IFR and IDY parameters through a minimum-operator strategy to enhance robustness in unconstrained optimization. The method is shown to satisfy…
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Multi-proxy evidence from the exposed strata at Okpekpe, Imiegba, and environs for nomenclature as Mamu Formation, Benin Flank, NW Anambra basin, Nigeria
Litho-sections along Okpekpe, Imiegba, and environs have been studied for their textural and microfossil contents to elucidate this recently exposed lithostratigraphic unit in the Benin Flank of the Anambra Basin. Five of the road-cut sections were mapped for their textural characteristics, facies…
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Dynamics of the Earth’s magnetopause’s subsolar location during solar cycle 24 in relation to the phases of geomagnetic storms of CME origin
This article analyses the response of the subsolar position (Ro) of the Earth’s magnetopause to geo-effective ICME storms in solar cycle 24, ranging from minor to extreme intensity, based on the model developed by Shue et al. (1998) and 1-minute OMNI data. The study combines a phase analysis of…