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Browsing Physics by Type "Dissertation"
Now showing items 1-20 of 101
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(University of Pretoria, 2016)Recent advances in computational technology and algorithms have made it feasible to accurately model the electronic structures of solids by means of density functional theory. The development of hybrid functionals have ...
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(University of Pretoria, 2020-12-14)Synthesis of activated carbon from biomass waste has recently become the main focus for the majority of the scientific community. In this study, activated carbons derived from peanut shell waste and its molybdenum-based ...
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(University of Pretoria, 2019)The accumulation of various defects in the material structure during its exploitation poses the most important limit on its lifetime. One of the simplest and most effective methods for restoring the nominal properties of ...
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(University of Pretoria, 2013)The ALICE (A Large Ion Collider Experiment) detector at the CERN Large Hadron Collider (LHC) is dedicated to studying the deconfined medium called the quark-gluon plasma (QGP), which is formed at extreme energy densities ...
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(University of Pretoria, 2013)Recently, was developed a new theory of the Jost function, within which, it was split in two terms involving on one side, singlevalued analytic functions of the energy, and on the other, factors responsible for the ...
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(University of Pretoria, 2012-11-12)The behaviour of iodine, before and after annealing, in pyrolytic carbon (PyC) has been studied using the Rutherford backscattering spectrometry (RBS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). PyC ...
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(University of Pretoria, 2008-04-24)The maximum entropy principle, pioneered by Jaynes, provides a method for finding the least biased probability distribution for the description of a system or process, given as prior information the expectation values of ...
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(University of Pretoria, 2015)Electron cyclotron resonance ion sources and electron string ion sources play an important role in the production of multi-charged ion beams. We have used these devices to irradiate highly oriented pyrolytic graphite with ...
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(University of Pretoria, 2009-12-08)Please read the abstract in the front of the document.
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(University of Pretoria, 2007-08-13)A fully automated Temperature Dependent Hall (TDH) measurement setup has been assembled for the purposes of this study. This TDH setup is capable of measuring samples in the 20 K to 370 K temperature range. Sample sizes ...
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(University of Pretoria, 2015)A short-version ( 10 m) Small Angle Neutron Scattering (SANS) beam line facility was installed at the South African Nuclear Energy Corporation (Necsa)'s SAFARI-1 Research Reactor. This was in a way to prepare for ...
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(University of Pretoria, 2006-11-30)Despite the poor understanding of charge transfer in conducting polymers, conducting-polymer-based devices have achieved considerable commercial success. This success is based largely on the reproducibility of the measurable ...
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(University of Pretoria, 2019)The study of higher spin gravity theories has gathered much interest in recent years. In three dimensions, these theories are particularly tractable due to the fact that they can be de ned in terms of a Chern-Simons ...
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(University of Pretoria, 2017)The abstract contains mathematical symbols and do not display correctly. It can be read in the document attached.
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(University of Pretoria, 2023)Density functional theory calculations were performed to enhance interaction of Li/Na atoms with a graphane monolayer for LIBs and NIBs. The energetic stability, electronic and electrochemical properties of Li/Na atoms on ...
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(University of Pretoria, 2023-05-25)In this ab initio study, density functional theory, including a Hubbard U correction term (DFT+U), calculations were performed to investigate the photoelectrochemical (PEC) water splitting possibility of SnS2 monolayer. ...
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(University of Pretoria, 2020-12)Neutral hydrogen (HI) is a key ingredient in galaxy formation and an excellent tracer of galaxy evolution and the environmental drivers thereof. HI volume density varies significantly with environment, where denser ...
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(University of Pretoria, 2019)Defects in semiconductors have been studied extensively over the past few decades. The advent of highly sensitive techniques such as deep-level transient spectroscopy (DLTS) and Laplace DLTS (LDLTS) has resulted in more ...
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(University of Pretoria, 2015)Several applications require the detection of terrestrial UV-C signatures. Efficiency, compactness, environmentally friendly and cost-effective requirements for UV-C–detectors resulted in a research interest in wide-bandgap ...
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(University of Pretoria, 2019)The measurement of spectral irradiance in the ultraviolet (UV) region of the electromagnetic spectrum has higher uncertainties largely due to a low signal-to-noise ratio (SNR). UV-C radiation emitted by low pressure (LP) ...
Now showing items 1-20 of 101