Theoretical and Applied Physics
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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.
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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 ...

Biomechanics of Surface Runoff and Soil Water Percolation
(20190623)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 FirstPrinciple Density Functional Theory Investigation
(20190623)The development of inexpensive, nontoxic, high efficiency and earthabundant 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
(20190622)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 CurrentInduced Dynamics of an Antiferromagnetic Skyrmionium
(20190622)In this thesis, we present a theoretical study on the currentinduced nucleation and propagation of antiferromagnetic skyrmionium. A skyrmionium, also known as 2πskyrmion, is a vortexlike magnetic structure characterized ...

Topological Antiferromagnetic Magnons
(20190712)We have studied a model for a noncollinear but coplanar antiferromagnetic spin texture on a two dimensional kagome lattice structure in the presence of DzyaloshinskiiMoriya Interaction (DMI). We observed some interesting ...

Tight Binding Descriptions of Graphene and Its Derivatives
(20171220)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
(20160620)Combinationcontrol 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
(20091113)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 PerdewBurkeErnzerhof (PBE) exchangecorrelation energy functional. Minimum energy ...

Ab Initio Density Study of N and O Coadsorption on Pt(100) and Pt(111)
(20091113)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
(20130513)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 OnChip Silicon Photonic Diode
(20130513)This work presents numerical calculation of electromagnetic waves in unidirectional onchip silicon optical diodes. An original optical diode, designed by Wang et. al. [Opt. Express. 19, 2694826955 (2011)], is based on ...

Simulation of Carbon Nanotube Growth
(20130513)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 ...

ElectroMagnetic Duality, Magnetic monopoles and Topological Insulators
(20130513)The Maxwell equations of electrodynamics acquire an additional symmetry if one assumes the existence of hypothetical particlesmagnetic monopoles, carrying a magnetic charge. The additional internal symmetry is the ...

Femtosecond Laser Surface Texturing of Materials for Various Applications
(20130513)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 inflow in Porous Duct
(20130513)In general, it is assumed in some non viscous flows that the flow velocity is constant at a crosssection. 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(3hexylthiophene)
(20130513)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
(20160617)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 PDMSbased ...

Optical Properties of Metal Clusters from First Principles Calculations
(20160617)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
(20160617)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 ...