African University of Science and Technology: Recent submissions
Now showing items 120 of 4619

Automatic Detection of Injecton Attack in Http Requests
(20190620)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 ...

Semantic Sentiment Analysis Based on Probabilistic Graphical Models and Recurrent Neural Networks
(20190723)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 ...

TechnoEconomic Feasibility of Ethane Based Enhanced Oil Recovery in Nigeria (CASE Study: Niger Delta)
(20171215)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 ...

Substitutional and vacancy defects in twodimensional AlSb: A first principle approach
(20190723)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 ...

Investigation of PeoPolymer Blend Electrolytes for Electrochemical Capacitors
(20190723)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 ...

Bioactive Polymer as an Alternative Binder for Electrochemical Capacitors
(20190723)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 MngGold, Kokoya District, Bong County, Liberia
(20190723)The presence of heavy metals in water and soil by metalliferous mining activities at MNGGold Mine was fully investigated. The extraction of gold in recent years, has led to the generation of huge quantities of solid and ...

Design and Testing of Mycelium Biocomposite
(20190723)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 ...

Investigation of LeadFree Bismuth Perovskite by Numerical Simulation using Scaps
(20190723)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 ...

Effect of Disorder on Spin Transport in Topological NonTrivial Magnetic Textures
(201906)An eﬀect that is observed when an electron passes through a noncollinear magnetic textures such as skyrmion, the electron gets deviated as a result of the ﬁctitious magnetic ﬁeld generated by the skyrmion giving rise to ...

Loss Function in Acturial Science and Estimation
(20190623)The nonlife insurance pricing consists of establishing a premium or a tariff paid by the insured to the insurance company in exchange for the risk transfer. A key factor in doing that is properly estimating the distribution ...

Integration in Lattice Spaces
(20190622)The goal of this thesis is to extend the notion of integration with respect to a measure to Lattice spaces. To do so the paper is first summarizing the notion of integration with respect to a measure on R. Then, a construction ...

Foundation of Stochastic Modeling and Applications
(20190622)This thesis presents an overview on the theory of stopping times, martingales and Brownian motion which are the foundations of stochastic modeling. We started with a detailed study of discrete stopping times and their ...

Employing Probabilistic Matching Algorithms for Identity Management in the Telecommunication Industry
(20190623)The telecommunication industry has a lot of data related to households, individuals and devices. Advertisers pay a premium to ensure they advertise to their target audience. To ensure that content is personalized, it is ...

Variational Inequality in Hilbert Spaces and their Applications
(20190623)The study of variational inequalities frequently deals with a mapping F from a vector 0 space X or a convex subset of X into its dual X . Let H be a real Hilbert space and a(u, v) be a real bilinear form on H. Assume that ...

LaSalle Invariance Principle for Ordinary Differential Equations and Applications
(20190623)The most popular method for studying stability of nonlinear systems is introduced by a Russian Mathematician named Alexander Mikhailovich Lyapunov. His work ”The General Problem of Motion Stability ” published in 1892 ...

Sobolev Spaces, Embedding Theorems and Applications to PDEs
(20190625)

A Modified Subgradient Extragradeint Method for Variational Inequality Problems and Fixed Point Problems in Real Banach Spaces
(20171218)Let E be a 2uniformly convex and uniformly smooth real Banach space with dual space E ∗ . Let A : C → E ∗ be a monotone and Lipschitz continuous mapping and U : C → C be relatively non expansive. An algorithm for ...

Spectral Decomposition of Compact Operators on Hilbert Spaces
(20171123)Compact operators are linear operators on Banach spaces that maps bounded set to relatively compact sets. In the case of Hilbert space H it is an extension of the concept of matrix acting on a finite dimensional vector ...

A Hybrid Algorithm for Approximating a Common Element of Solutions of a Variational Inequality Problem and a Convex Feasibility Problem
(20171218)In this thesis, a hybrid extragradientlike iteration algorithm for approximating a common element of the set of solutions of a variational inequality problem for a monotone, kLipschitz map and common fixed points of a ...