African University of Science and Technology: Recent submissions
Now showing items 161-180 of 4790
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Investigation of Lead-Free Bismuth Perovskite by Numerical Simulation using Scaps
(2019-06-23)The theoretical study of methylammonium bismuth halide, (CH 3 NH 3 ) 3 Bi 2 I 9 , was simulated using SCAPS 1D software package. The effect of the bismuth perovskite absorber layer thickness on the solar cell performance ...
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Design, Construction and Evaluation of Charcoal, Activated Carbon, Moringa Seed and Sand Water Filtration Systems
(2019-06-23)The majority of human population especially in developing countries suffers from water-borne diseases such as skin abscesses, cellulitis, skin infections, and diarrhoea due to improperly treated water. Safe drinking water ...
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Design and Testing of Mycelium Biocomposite
(2019-06-23)The growing global understanding of ecological footprints and environmental pollution invented by humans is gainfully affecting our material design practice, pushing the search for more sustainable alternatives, and ...
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First-Principles Density Functional Theory Studies of the Structural and Electronic Properties of Prodigiosin as a Cancer Drug
(2019-06-23)Prodigiosin molecule, whose efficacy in the treatment of cancer has proven positive, has been studied using first-principles Density Functional Theory (DFT) methods as implemented in VASP - Vienna Ab initio Simulation ...
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Bioactive Polymer as an Alternative Binder for Electrochemical Capacitors
(2019-07-13)Binders are important components of electrodes of supercapacitors because of their ability to adhere active components and make the resultant slurry to adhere on current collectors. This work seeks to investigate the ...
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First Principles Study of Porous Carbon as Anode Material for Metal-Ion (Na, Li, Mg) Batteries Applications
(2019-06-23)Sodium-ion batteries (SIBs) have been identified as an effective technology for grid-scale energy storage because of relatively low cost and natural abundance of sodium, but the lack of suitable anode materials with high ...
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Assessment of Heavy Metal Pollution in Soil and Surface Water in Mng-Gold, Kokoya District, Bong County, Liberia
(2019-07-12)The presence of heavy metals in water and soil by metalliferous mining activities at MNG-Gold Mine was fully investigated. The extraction of gold in recent years, has led to the generation of huge quantities of solid and ...
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Malware Classification into Families Based on File Contents and Characteristics
(2017-11-29)The use of malicious software (malware) as an instrument for carrying out different criminal activities both organised and non-organised have become the major threat faced by today’s world of connectivity. Frequency and ...
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Pressure Transient Analysis of Bingham Fluids using Tiab’s Direct Synthesis Approach
(2019-07-23)This study investigated transient flow response of heavy oil that exhibit Bingham fluid characteristics. Four wellbore conditions in naturally fractured reservoirs were considered which include horizontal well, hydraulically ...
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Quantifying the Risks of Wellbore Failure during Drilling Operations Using Bayesian Algorithm
(2019-06-23)The wellbore integrity plays an important role in petroleum operations like drilling, well completion and production. Caliper, Electrical image logs, Acoustic televiewers (ATV) and Optical televiewers (OTV) are some of the ...
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Malaria Prediction using Bayesian and other Machine Learning Techniques
(2019-09-12)Main purpose of data mining is to extract valuable information from available data. With the enormous amount of data stored in files, databases, and repositories, in the healthcare sector, it’s increasingly important, if ...
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Investigation of Lead-Free Bismuth Perovskite by Numerical Simulation using Scaps.
(2019-07-22)The theoretical study of methylammonium bismuth halide, (CH 3 NH 3 ) 3 Bi 2 I 9 , was simulated using SCAPS 1D software package. The effect of the bismuth perovskite absorber layer thickness on the solar cell performance ...
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Automatic Detection of Injecton Attack in Http Requests
(2019-06-20)Malicious user requests pose a vicious threat to backend devices which execute them; more so, could result in the compromise of other user accounts, exposing them to theft and blackmail. It becomes imperative to sanitize ...
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Semantic Sentiment Analysis Based on Probabilistic Graphical Models and Recurrent Neural Networks
(2019-07-23)Sentiment Analysis is the task of classifying documents based on the sentiments expressed in textual form, this can be achieved by using lexical and semantic methods. The purpose of this study is to investigate the use of ...
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Techno-Economic Feasibility of Ethane Based Enhanced Oil Recovery in Nigeria (CASE Study: Niger Delta)
(2017-12-15)Increasing oil recovery has been one of the issues enlisted for attention in oil producing countries around the world for past decades. So many forms of oil recovery techniques have been considered; infill drilling of new ...
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Substitutional and vacancy defects in two-dimensional AlSb: A first principle approach
(2019-07-23)AlSb is a semiconductor material which exist in 3D as well as 2D regimes. AlSb have a high electron mobility which is useful for application in high speed electronic devices. AlSb has potential applications in radiation ...
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Investigation of Peo-Polymer Blend Electrolytes for Electrochemical Capacitors
(2019-07-23)Recently, there has been a drift of attention towards gel polymer based electrolytes owing to the fact that they are cheap and can achieve an extended potential window for improved energy density in s upercapacitor devices ...
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Bioactive Polymer as an Alternative Binder for Electrochemical Capacitors
(2019-07-23)Binders are important components of electrodes of supercapacitors because of their ability to adhere active components and make the resultant slurry to adhere on current collectors. This work seeks to investigate the ...
-
Assessment of Heavy Metal Pollution in Soil And Surface Water in Mng-Gold, Kokoya District, Bong County, Liberia
(2019-07-23)The presence of heavy metals in water and soil by metalliferous mining activities at MNG-Gold Mine was fully investigated. The extraction of gold in recent years, has led to the generation of huge quantities of solid and ...
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Design and Testing of Mycelium Biocomposite
(2019-07-23)The growing global understanding of ecological footprints and environmental pollution invented by humans is gainfully affecting our material design practice, pushing the search for more sustainable alternatives, and ...