Browsing Doctoral Degrees (Physics) by Subject "ThesesPhysics."
Now showing items 120 of 53

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 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 ... 
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 ... 
Classical noise in quantum systems.
(2013)Quantum mechanics contains a fresh and mysterious view of reality. Besides the philosophical intrigue, it has also produced and continues to inspire tantalizing new technological innovations. In any technological system, ... 
Computational studies of bondsite percolation.
(2007)Percolation theory enters in various areas of research including critical phenomena and phase transitions. Bondsite percolation is a generalization of pure percolation motivated by the fact that bondsite is close to ... 
Computer simulation of nonadiabatic dynamics by means of the quantumclassical Liouville equation.
(2013)Simulation of quantum dynamics for manybody systems is an open area of research. For interacting manybody quantum systems, the computer memory necessary to perform calculations has an astronomical value, so that ... 
The context of problem tasks in school physical science.
(1999)The purpose of this study was to extend our current knowledge about what happens in physical science classrooms. The focus was the context of problem tasks. This involved the study of the situations, events and factors ... 
The evolution of orbitalangularmomentum entanglement of photons in turbulent air.
(2013)Quantum entanglement plays an important role in the emerging quantum information processing and communications tasks. To this day, almost all these tasks use quantum systems described by a two dimensional Hilbert space ... 
Exactly solvable models for qubits coupled to spin environments : decoherence and entanglement.
(2008)During the last decade the field of quantum information has seen considerable progress both theoretically and experimentally. The building block of this theory is the socalled qubit, the quantum counterpart of the ... 
Experimental investigation and theoretical analysis of the structural relaxation in amorphous Fe40Ni40B20.
(1998)Amorphous metallic alloys are produced by a variety of techniques some of which involve rapid solidification of the alloying constituents. In these methods the solidification occurs so rapidly that the atoms are frozenin ... 
Fe Mossbauer investigations in diamond, SiGe and Ge single crystals.
(2006)Abstract available in PDF file. 
Field and model studies of the nearshore circulation.
(1967)Investigations into the characteristics and underlying mechanism of the circulation of water near the shore are reported. The two main types of circulation, one a cellular system resulting from Haves propagated nearly ... 
First principles quantum mechanical studies of iridium : a focus on bulk and surface properties.
(2003)Recent highpressure experiments on iridium show a transition to a 14 atomic layer superlattice structure. Since iridium has a high bulk modulus, it is used in many highpressure applications, for instance as a gasket for ... 
Freespace communication in quantum key distribution.
(2015)Quantum cryptography permits the sharing of a secret key hence information between authorized parties such that an unauthorized party is unable to obtain any useful information. A quantum and a classical authenticated ... 
The influence of rotating and locked magnetic islands on edge transport in Tokoloshe tokamak.
(1993)The turbulence and fluctuation induced transport in the edge plasma of the Tokoloshe tokamak was studied using a Langmuir probe array. In this thesis three separate experiments are presented, each of which examines a ... 
Invariant multipole theory of induced macroscopic fields in homogenous dielectrics.
(2013)A harmonic plane electromagnetic wave incident on a molecule distorts its charge distribution, thereby producing an infinite series of induced multipole moments expressed in terms of contributions that are due to the ... 
Investigation of conceptual and language difficulties affecting the understanding of several mechanics concepts among some African teachers and students.
(1998)The results of national examination in matric and universities showed that African students were performing very poorly in their studies and examinations in science and in physics in particular. The objective in this ...