Browsing Physics by Title
Now showing items 1-20 of 245
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1-D particle-in-cell simulations of plasmas with kappa velocity distributions.
(2013)The main aim of this project was the development of a particle-in-cell (PIC) plasma simulation code. While particle-in-cell simulations are not new, they have largely focused on using an initial Maxwellian particle ... -
57 Fe Mössbauer studies of 57 Mn* implanted III-V semiconductors InP and InAs.
(2011)III-V compound semiconductors such as Gallium Arsenide, Indium Phosphide as well as Indium Arsenide have recently demonstrated the capability of applications in high speed semiconductor devices compared to those made from ... -
Aerosol characteristics over different regions of southern Africa : using sunphotometer and satellite measurements.
(2015)Aerosols and cloud play a major role in understanding and interpreting the varying earth’s energy budget. It is necessary to characterize these atmospheric particles by their sizes, chemical composition, water content etc. ... -
Analysing transient effects in the ionosphere using narrowband VLF data.
(2009)Very Low Frequency (VLF) radio waves propagate within the Earth-ionosphere waveguide with very little attenuation. Modifications of the waveguide geometry affect the propagation conditions, and hence, the amplitude and ... -
An analysis of Pc5 pulsations observed in the SuperDARN radar data.
(2009)This thesis deals with the development of automatic methods for nding pulsation events in time series produced by the radars in the SuperDARN network. These methods are then applied to the detection and analysis of ... -
Applications of digital holograms for the selection and detection of transverse laser modes.
(2014)The transverse mode of generally available commercial lasers in most instances is not suitable for desired applications. Shaping the laser beam either extra-cavity, that is outside the laser resonator, or intra-cavity, ... -
Applications of Lie symmetry analysis to the quantum Brownian motion model.
(2008)Lie symmetry group methods provide a useful tool for the analysis of differential equations in a variety of areas in physics and applied mathematics. The nature of symmetry is that it provides information on properties ... -
Applications of light scattering and refraction by atmospheric gases.
(2002)LIDAR, an acronym for LIght Detection And Ranging, is a system used for studying the scattering of laser light incident on a parcel of air. This thesis investigates the atmosphere above the Durban region using two ... -
Assessment of the efficiency of solar radiation concentrating system.
(2009)A Solar Radiation Concentrating System for generation of high temperature heat for a solar oven was developed and evaluated at the University of KwaZulu-Natal, Westville Campus, Durban - South Africa. The system concentrates ... -
The association between VLF and ELF chorus emissions and electron precipitation.
(2009)This is an investigation into the association between ionospheric absorption caused by electron precipitation and ELF:3 Hz-3 kHz and VLF:3 kHz-30 kHz, chorus. Ionospheric absorption was measured using the chain of riometers ... -
Aurora and associated VLF phenomena.
(1978)Observations have been made at Sanae (gm. lat. -63,71°) on occurring auroral forms, (diffuse and pulsating aurora), and simultaneous occurring VLF phenomena, (whistlers and auroral hiss) . Two studies ... -
Avoidance of trappings in continual collapse of spherical stars.
(2019)In this dissertation we study the physical process of a spherically symmetric perfect uid experiencing a continuous gravitational collapse in concurrence with continuous radiating energy in an outward spacetime. Trapped ... -
Baseline demand responsiveness framework for the conventional grid through appliance scheduling by evolutionary metaheuristics.
(2020)A major problem of many energy environments nowadays, is an obsolete and highly inefficient electricity supply system, the Conventional Grid (CG), characterized by a high peak to average ratio, out of an uncontrollable ... -
Beam generated instabilities in space plasma.
(1999)Electrostatic instabilities associated with a model applicable to the auroral acceleration region consisting of an ion beam, precipitating electrons and stationary background electrons are theoretically investigated. The ... -
Binary and ternary molecules blend bulk heterojunction organic solar cell.
(2015)Bulk heterojunction organic solar cells were prepared and characterized in terms of electrical and optical properties of the photosensitive medium. Two cases of organic solar cells were developed in this investigation ... -
Biochemical-physical mechanisms of light-tissue interactions.
(2021)Optical tissue phantom samples simulating the optical properties of the human prostates and brain tissues were fabricated. The experimental set-up was designed to be cost-effective but reliable, allowing for convenience ... -
Bulk heterojunction organic solar cell.
(2014)The low material costs and the ease fabrication procedures of organic solar cells has earned them too much interest from scientists all over the world. Much of the e orts were given to the improvement of the power ... -
Bulk heterojunction organic solar cells and thin film electrode buffer layers : synthesis, preparation and characterization.
(2016)Abstract available in PDF file. -
Characterisation and quantum application of plasmonic waveguides.
(2016)Plasmonics o ers sub-di raction confinement of light, which a ords enhanced coupling to emitter systems (e.g. quantum dots). This feature makes possible a range of on-chip quantum photonic components - most notably ...