Browsing School of Chemistry and Physics by Title
Now showing items 140-159 of 700
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Determination of quantum entanglement concurrence using multilayer perceptron neural networks.
(2017)Artificial Neural Networks, inspired by biological neural networks, have seen widespread implementations across all research areas in the past few years. This partly due to recent developments in the field and mostly due ... -
Determination of the inorganic pollutants in South African sewage sludges.
(2004)A total of 78 sludge samples originating from 69 sewage works of South Africa were used in this investigation. Seven of the sludge samples were liquid and the rest were solid. Moisture content, pH and mineral ion determination ... -
Development and performance evaluation of a prototype bio-optical sensor for in-water applications.
(2012)No abstract available. -
The development and testing of computer-aided teaching tools - addressing the conceptual and practical difficulties experienced by first year physics students.
(2002)There has been a great deal of research, both locally and abroad, conducted on the learning practices of students at school and at tertiary levels. In an attempt at improving the status of education, some educators have ... -
Development of a mathematical model to enable optimal efficiency of the indabuko lithium-ion battery.
(2020)Cathode materials are the foremost primary challenge for the vast scale application of lithium-ion batteries in electric vehicles and the stockpiles of power. Foreseeing the properties of cathode materials is one of the ... -
Development of a post-processing technique for a Quantum Key Distribution system.
(2017)Quantum Information, Processing and Communication (QIPC) is a field concerned with technological implementations established on quantum mechanical phenomena. It is established on the concept that the action of ... -
Development of encoding and entanglement for free space quantum key distribution.
It is established that the manipulation of quantum information is bound only by the laws of physics and thus information can be characterised, quantified and processed as a physical entity using the basic properties of ... -
Development of near real time and cumulative GIC proxy indices.
(2021)Geomagnetic storms are phenomena which can give rise to geomagnetically induced currents (GICs), which have an adverse effect on technology in that they can cause anomalous low frequency currents that damage critical ... -
Devices for the construction of a cold atom experiment.
(2013)The experimental setup for laser cooling and trapping of 87Rb atoms with the aid of a Magneto-optical trap (MOT) is discussed. The experiment has a diverse setup, which includes: a vacuum system in which the cooling and ... -
Dicopper and dirhodium phosphorusbipyridyl ligand-bridged complexes : electrocatalysts for carbon dioxide reduction.
(1994)Abstract available in pdf file. -
Digital control of light.
(2019)The objective of this research was to describe innovative ways in which digital holography can be applied in controlling laser light. The ability to control and manipulate a laser beam has become an extremely desirable ... -
Digital, statistical and wavelet study of turbulence flow structure in laboratory plunging water waves.
(2014)This dissertation presents an experimental investigation set out to study the evolution of turbulence in laboratory generated breaking water waves. The waves propagate and break as plunging waves on a 1:20 sloping beach. ... -
Dinuclear complexes of copper, silver and gold bridged by phosphoruspyridyl and phosphorusnaphthyridyl ligands.
(1995)Chapter 1 setves as an introduction to the synthesis and characterisation of copper(!), silver(!) and gold(!) complexes of the 2,6-bis( diphenylphosphino )pyridine { (Ph2P)2py}, phenylbis(2- pyridyl)phosphine {PhP(py)2 ... -
Dinuclear complexes of CU(I), PD(I), PT(I) and RU(I) : catalysts for the electrochemical reduction of CO2.
(2001)No abstract available. -
The discovery and characterization of antiprotozoal compounds from South African medicinal plants by a HPLC-based activity profiling technique.
(2013)A total of 507 plant extracts from 174 South African plant species, selected based on their traditional uses against parasitic diseases, mainly against malaria were screened against Plasmodium falciprum, Trypanosoma ... -
Dissipative gravitating systems.
(2011)In this thesis we investigate the effect of shear on radiating stars undergoing gravitational collapse. The interior spacetime is described by the most general spherically symmetric line element in the absence of rotation. ... -
DNA cleavage, photoinduced by benzophenone-based sunscreens.
(2003)The topical application of sunscreens is widely practised to protect healthy and photosensitive skins from the sun. The benzophenone-derived sunscreens, e.g. 2-hydroxy-4-methoxy benzophenone-5-sulphonic acid (or benzophenone-4) ... -
Doping titanium dioxide with copper, nitrogen, or sulphur : physico-chemical properties and their photo-catalytic activity towards emerging pollutants.
(2015)Abstract available in PDF file. -
Dynamics and thermalization of a fermion in a fermionic bath embedded in a bosonic bath.
(2013)We consider a model consisting of a finite number of quantum dots each of which confines a spinless electron. We zoom in on a single quantum dot containing an electron of interest treating it as being strongly coupled ...