Theoretical and Applied Physics

 

This collection belongs to the Masters graduands of Theoretical and Applied Physics department in AUST . They are rigorous research work in different areas under this field of study, which can be applied and used to solve identified Scientific problems.

Recent Submissions

  • Biomechanics of Surface Runoff and Soil Water Percolation 

    James, Makol Madut Deng (2019-06-23)
    In this study, the complex interaction of surface runoff with the biomechanics of soil water transport and heat transfer rate is theoretically investigated using mathematical model that rely on the two phase flows of an ...

  • Structural, Electronic and Optical Properties of Cu 2 Sns 3 Solar Absorber: A First-Principle Density Functional Theory Investigation 

    Isyaku, Abdullahi Odoguje (2019-06-23)
    The development of inexpensive, non-toxic, high efficiency and earth-abundant solar absorbers is critical for terawatt scale implementation of photovoltaics. Cu 2 SnS 3 is a promising earth abundant absorber material that ...

  • Pulsed Lasers in Lidar Application: Models for Optimizing Wind Turbine Performance 

    Iroh, Michael Chijioke (2019-06-22)
    Since the appearance of the first wind turbines at the end of the nineteenth century, wind energy has been considered to be a renewable energy source for not just developed countries but also developing countries as well. ...

  • Theoretical Study of Current-Induced Dynamics of an Antiferromagnetic Skyrmionium 

    Abayomi, Samuel Obadero (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 ...

  • Topological Antiferromagnetic Magnons 

    Jamiu, Adam Ajibola (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 ...

  • Tight Binding Descriptions of Graphene and Its Derivatives 

    Muhammad, Maikudi Isah (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 ...

  • Combination and Tracking Control of Chaotic Systems 

    Abdulgaffar, ABdurrazaq (2016-06-20)
    Combination-control of two or more systems which may have important application in Josephson junction ratchet array, and other physical systems has not been explored. Most of the theoretical framework is on combination ...

  • First Principle Study: Absorption of Molecular Hydrogen Sulphide on Gold Clusters 

    Igunbor, Emmanuel (2009-11-13)
    We present theoretical results of the study of H 2 S adsorption on gold cluster Au n (n = 1, 5) using density functional theory with Perdew-Burke-Ernzerhof (PBE) exchange-correlation energy functional. Minimum energy ...

  • Ab Initio Density Study of N and O Coadsorption on Pt(100) and Pt(111) 

    Obodo, Tobechukwu Joshua (2009-11-13)
    We have used ab initio density functional theory to study the coadsorption of N and O on Pt(100) and Pt(111) surfaces. Our calculations show that on Pt(100) the most favourable site is the hollow site for N and the bridge ...

  • Fundamentals of Laser Dynamics 

    Sanni, Dahiru Muhammad (2013-05-13)
    The thesis presents the modeling and simulation of three types of lasers namely; Semicondoctor laser, Solid state laser and CO 2 laser. The rate equations were derived and simulated to examine the dynamic behaviour of the ...

  • The Design of an On-Chip Silicon Photonic Diode 

    Okikiola, Olaniyan (2013-05-13)
    This work presents numerical calculation of electromagnetic waves in unidirectional on-chip silicon optical diodes. An original optical diode, designed by Wang et. al. [Opt. Express. 19, 26948-26955 (2011)], is based on ...

  • Simulation of Carbon Nanotube Growth 

    Ogunbunmi, Michael Olawale (2013-05-13)
    The basic understanding of the underlying techniques of growing Carbon Nanotubes (CNTs) with a specific chirality is still obscure and needs to be understood so as to properly harness its potentials. Using both Classical ...

  • Electro-Magnetic Duality, Magnetic monopoles and Topological Insulators 

    Nounahon, Mahougnon Philippe (2013-05-13)
    The Maxwell equations of electrodynamics acquire an additional symmetry if one assumes the existence of hypothetical particles-magnetic monopoles, carrying a magnetic charge. The additional internal symmetry is the ...

  • Femtosecond Laser Surface Texturing of Materials for Various Applications 

    Nforneh, Benjamen (2013-05-13)
    Femtosecond lasers represent an electromagnetic field with field intensities approaching and even exceeding atomic binding field. When irradiated on a target, the material responses change from linear to nonlinear within ...

  • Nonlinear Effect in-flow in Porous Duct 

    Hafeez, Yusuf Hafeez (2013-05-13)
    In general, it is assumed in some non viscous flows that the flow velocity is constant at a cross-section. In this thesis, If we impose more realistic boundary conditions by, for example, introducing viscosity,and suction ...

  • Influence of Molecular Polarizability on the Active Layer of Organic Photovoltaic Cells: A case study of Poly(3-hexylthiophene) 

    Cornah, Bennie Elizabeth (2013-05-13)
    The complexity of the microstructure of the active layer in organic photo- voltaics (OPVs) poses a unique challenge in improving the efficiency of OPV devices. Molecular dynamics (MD) simulation provides a direct route ...

  • Surface Modification of Polymeric Biomaterials for Cell/Tissue Integration 

    Yirijoh, John (2016-06-17)
    This thesis presented the surface modification of polydimethyl siloxane (PDMS) to enhance surface wettability and surface roughness. Physical and chemical modifications were performed on cured surfaces of PDMS and PDMS-based ...

  • Optical Properties of Metal Clusters from First Principles Calculations 

    Ogenyi, Sunday Joseph (2016-06-17)
    Ground State structures of neutral Copper clusters Cu N =3−6 were generated and optimised within the framework of the Density Functional Theory (DFT) using Generalised Gradient Approximation (GGA) and ultrasoft pseudopotential. ...

  • Analysis of Magneto Hemodynamics of Blood in a Stenosed Artery 

    Ngufour, Korande (2016-06-17)
    Human body responds to physical activities, external temperature, external magnetic field, and other factors by homeostatically adjusting its blood flow in order to deliver nutrients such as oxygen and glucose to every ...

  • Ultrafast X-rays Imaging For Medical Physics 

    Kakmeni, Keou Nabil Stephane (2016-06-17)
    In this thesis we explored the production of highly coherent and energetic extreme ultra violet(XUV) radiation through the process of high harmonic generation(HHG). HHG is a process by which a ultrashort laser pulse interact ...

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