Browsing Theses and Dissertations by Title
Now showing items 468-487 of 507
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Synthesis and Characterisation of Extruded Alkali Activated Earth-Based Composites for Sustainable Building Construction
(2019-09-22)Alkali activation is a rapidly developing area in the global materials research and development community. It is based on alkali aluminosilicate chemistry with primary focus on the activation of solid aluminosilicate ...
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Synthesis and Characterization of Iron Oxide via Chemical Leaching from Bioinspired Termite Mound for Biomedical Application
(2021-03-15)Nanomedicine has gained a lot of attention as a potential solution in theragnosis of cancer. With the introduction of nanoscale metallic oxide materials, imaging techniques, disease detection, and treatment modalities could ...
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Synthesis of the Conventional Phenomenological Theories with Marginal Fermi Liquid Model
(2011-11-20)The high temperature superconducting cuprates show some non Fermi liquid behaviour in their normal state. Also there is no generally accepted theory of high temperature superconductivity. The BCS theory has failed to ...
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Technical Assessment of Mining Site and Barite Quality in Nigeria
(2017-12-16)Barite is an exceptional non-metallic mineral composed of barium sulphate and it is used mainly by the oil and gas industry as drilling mud in deep drilling, where high pressure is encountered. The specific gravity of ...
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Techno Economic Analysis of Heavy Oil Field in Nigeria
(AUST, 2019-06-14)The main challenge of heavy oil (bitumen) is the high viscosity making it not flow easily to production wells at normal reservoir conditions. Thermal recovery methods are used to exploit heavy oil reservoirs, where oil ...
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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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Technological Considerations for Devs-Based System Control
(2016-06-15)System control has grown from manual control where humans sense the environment, analyse the result and determine control actions to semi-automated control. In semi-automated control sensing is done by sensing devices and ...
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Temperature Prediction Model for Flowing Distribution in Wellbores and Pipelines
(2011-12-12)Down-hole temperature and pressure data are important information needed to understand flowing conditions and production optimization. For example, knowing the wellbore temperature profile is useful in predicting the wax ...
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Text Mining of Twitter Data: Topic Modelling
(2019-06-16)Access to the Internet is becoming more affordable especially in Africa and with this the number of active social media users is also on the rise. Twitter is a social media platform on which users post and interact with ...
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Text Retrieval Using Wavelet Tree
(AUST, 2021-07-20)The wavelet tree is a flexible data structure that permits representing sequences S[1; n] of symbols over an alphabet of size (n), within compressed space and supporting a wide range of operations on S. It has been used ...
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Theoretical Analysis of Gravity-Controlled Waterfloods
(2009-12-15)The concept of dumpflooding is to flow water from a high pressure aquifer zone to a low pressure oil producing zone by natural force of gravity through a well connecting the two zones to enhance oil sweep into a producing ...
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Theoretical and Computational Modeling of an Implantable Biomedical Device for Localized Hyperthermia and Drug Delivery
(2011-10-24)The advent of nanotechnology together with Biomedical Microelectro-Mechanical Systems (BioMEMS) for improved efficacy in treatment of cancer has resulted in the development of an implantable biomedical device for localized ...
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Theoretical and Computational Modeling of the Effects of Electromagnetic Field on the Plasmodium Falciparum
(2011-12-15)The study explores the potential effects of the remote application of cyclic magnetic field to the female anopheles mosquitoes that carry malaria parasites. The goal is to develop a theoretical basis that can guide the ...
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Theoretical Study of Current-Induced Dynamics of an Antiferromagnetic Skyrmionium
(2019-06-22)In this thesis, we present a theoretical study on the current-induced nucleation and propagation of antiferromagnetic skyrmionium. A skyrmionium, also known as 2π-skyrmion, is a vortex-like magnetic structure characterized ...
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Thermal Transient Testing Using Tds Technique
(2011-12-12)In the estimation of most reservoir parameters in well test, the reservoir is assumed to be isothermal which is practically not true due to the fact that there are heat sources due to friction in the wellbore, works done ...
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Thermodynamic Analysis of Unsteady Mhd Boundary Layer Flow With Slip Over a Permeable Surface
(2016-06-12)Magnetohydrodynamics (MHD) boundary layer flow problems have become important in industrial manufacturing processes such as plasma studies, chemical engineering, electrochemistry, polymer processing, petroleum industries, ...
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Tight Binding Descriptions of Graphene and Its Derivatives
(2017-12-20)Graphene is an effectively two dimensional form of carbon atoms arranged in honeycomb lattice. Due to its lightweight, high electron mobility and other special electronic properties it is considered both an academically ...
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Topological Antiferromagnetic Magnons
(2019-07-12)We have studied a model for a non-collinear but coplanar antiferromagnetic spin texture on a two dimensional kagome lattice structure in the presence of Dzyaloshinskii-Moriya Interaction (DMI). We observed some interesting ...
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Towards a New Exchange-Correlation Density Functional for more Accurate Band Gap Predictions
(2016-06-17)Density-Functional Theory (DFT) offers a simplification to electronic structure problems by using the electron density instead of the wave-function. Unlike the wave-function which is a function of 3N variables (excluding ...