Magister Artium - MA / This study explores the nuances around gendered dynamics, attitudes, ideologies, values and knowledge that exist within astronomy and astrophysics institutions paying specific attention to the South African Astronomical Observatory (SAAO) as study site. This study investigated implicit and explicit ways in which SAAO spaces and practices are gendered and hierarchized, and the extent to which 'astronomy as a specific discipline within science' remains highly masculinized. By focusing on studies on power, feminist critiques of science and institutional culture in other South African sectors, especially higher education, the study deconstructs a field that has been relatively neglected in South African feminist studies of gendered institutional culture. This thesis makes use of feminist qualitative methodological approaches and fuses mixed methods to collect data. The use of participant observation enabled a broader understanding of the context and to gain an understanding of how gendered, classed and raced subjects construct and navigate social meanings in the hierarchized and symbolically marked space of the SAAO. / National Research Foundation (NRF)

Thesis (M.M. (Finance & Investment))--University of the Witwatersrand, Faculty of Commerce, Law and Management, Graduate School of Business Administration, 2013. / Recent unexpected variability in the earnings of agribusinesses in South Africa has led stakeholders to ask as to why projected financial performance tended to be so different from the actual results achieved. This paper aims to make an empirical contribution to the discussion on the effects of soft commodity price volatility on the returns of entities whose major business involves derivatives trading in agricultural commodity products. Firstly, mathematical models for commodity price volatility are determined for the major agricultural commodities on the South African Futures Exchange (SAFEX) using the autoregressive conditional heteroskedasticity (ARCH) and the generalised autoregressive conditional heteroskedasticity (GARCH) type of approaches. Secondly, the study then seeks to ascertain whether there are causality links between the commodity price volatility and the returns or earnings realised by selected agribusinesses over time. The paper then discusses some trading strategies that are applicable given that commodity price volatility can be forecasted using the statistical models identified under the study.

A research report submitted to the Faculty of Humanities, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Arts in Creative Writing, 2017 / XL2018

Thesis (M.A. (African Languages)) -- University of the North, 1997 / Refer to the document

Thesis (M.A.) --University of Limpopo, 2008. / The study analyses some of the translation problems of terms from English to Xitsonga, taking into consideration the translation work done thus far with special reference to South African law. The study is divided into six chapters: Chapter one is the introduction. It indicates the aim and rationale behind its study. It also highlights the methodology to be used, scope, terminological work done thus far and a brief definition of significant themes that are of importance to the study, which include “Terminology, Language for General Purpose, Language for Specific Purpose, Translation, Semantics and Indigenous law”. The chapter will also have a summary. Chapter two outlines some of the translation problems of terms from English to Xitsonga. In order to achieve this, the study will look into some of the translation work on terminology done thus far. A summary to the chapter will be given. Chapter three is about some of the terminology of the South African Law, where the translation problems outlined in chapter 2 will guide with the translation of the terminology of this law. These terms will be defined in English, summarised in Xitsonga which will then assist with the equivalents of these terms in Xitsonga. The chapter will also be summarised. Chapter four gives the summary of all the terms which have been used to bring forth this analysis, guided by the translation problems found in chapter 2. A summary to this chapter will be given. Chapter five is the general conclusion of the study and recommendations. Chapter six lists cited materials in the study. / University of Limpopo.

Thesis (LLM)--University of Limpopo, 2010 / The study evaluates the common law position regarding the principle of legitimate expectation at the workplace. Under the common law, the employer had the power to hire and to fire as he or she pleased. The employer could either fire for a good reason or for a bad one or for no reason at all, provided the dismissal was on notice. In other words the employer was not required to show good cause for terminating the contract or to inform them employee of such reasons as they may be or to follow any special procedures before termination. It was not possible for the employee to raise question of legitimate expectation by then. The study exposed the complexity of this principle in our current labour laws. The two schools of thoughts regarding the principle have been analysed herein and a proper recommendation was made.

Thesis (M.A. (English Studies)) -- University of Limpopo, 2015 / This dissertation discusses the significance of the concept of mourning in post-apartheid South Africa as presented in the following selected post-apartheid South African literary texts: Ways of dying, a novel by Zakes Mda; Nothing but the truth, a play by John Kani and Freedom lament and song, a poem by Mongane Wally Serote. The dissertation interrogates the legitimacy of the prefix ‘post’ in ‘post-apartheid’ as a point of departure. It discusses the theories of key thinkers on the concept mourning and then applies their theories to the analysis of the selected literary texts thereby interpreting the selected literary texts as symbolic codes communicating messages about the state of politics in post-apartheid South Africa. 5

Philosophiae Doctor - PhD / Dyspigmentation is one of the commonest dermatological presenting complaints from patients, particularly hyperpigmentation. Hyperpigmentation can cause dangerous psychological and emotional impact on self-perception and health quality of lives of people affected. However, of all the diseases encountered globally, epidemiological data has shown that skin diseases account for almost 34% of all the diseases and these dermatological disorders have gotten worse over time. The gold standard for treatment of hyperpigmentation is hydroquinone. Despite its efficacy, hydroquinone and other current modalities of treatments are associated with some side effects. There are a number of natural products derived from medicinal plants that have proven to be an abundant source of biologically active compounds and a lot of these have served as the basis for the development of new lead chemicals for pharmaceutical. The present study focused on screening of selected South African plants (Maclura pomifera, Otholobium fruticans, Phyylica ericoides, Psoralea aphylla, Rhynchosia villosa, and Serruria furcellata) for their antimelanogenic potentials. Methanol and ethyl acetate were used for the extraction of plant materials. Standard methods were employed for evaluation of cytotoxicity of the methanolic leaf extracts (MLE), ethyl acetate leaf extracts (ELE) and melanin synthesis potentials on B16 melanoma cells. To elucidate mechanisms of melanin reduction action, intracellular tyrosinase activity was determined by measuring the rate of L-DOPA oxidation. Tyrosinase activity was assessed further with dihydroxyphenylalanine (DOPA) staining. The mode of action was further determined by evaluating reactive oxygen species (ROS) and expressions of melanogenesis gene using qPCR. The results showed that O. fruticans and S. furcellata reduced melanin synthesis without cytotoxicity. O. fruticans inhibited tyrosinase activity, increased ROS and suppressed the expression of TYR, TRP-1, TRP-2/Dopachrome tautomerase, MITF, MC1R but upregulated β-Catenin. S. furcellata stimulated tyrosinase activity and did not increase ROS. It upregulated the expression of TYR, TRP-1, TRP-2, and MC1R while MITF and β-Catenin were suppressed. The results showed that O. fruticans reduced melanin synthesis via cAMP pathway while S. furcellata reduced the synthesis via possibly degradation of melanin pigment. The present study on O. fruticans and S. furcellata has shown that leaves of these plants are candidate anti-melanogenic agents. However, more work still needs to be done to elucidate other possible mechanisms that are relevant to antimelanogenic effects of these two plants. / 2020-08-31

<p>&nbsp / <span style="font-size: 12pt / font-family: &quot / Times New Roman&quot / ,&quot / serif&quot / mso-fareast-font-family: 'Times New Roman' / mso-ansi-language: EN-US / mso-fareast-language: EN-US / mso-bidi-language: AR-SA">District Six was a community that was forcibly removed from the centre of Cape Town after its demarcation as a white group area in 1966. In 1989, the District Six Museum Foundation was established in order to form a project that worked with the memory of District Six. Out of these origins, the District Six Museum emerged and was officially opened in 1994 with the museum in the 1980s occurred at the same moment that the social history movement assumed prominence within a progressive South African historiography. With the success of <span style="mso-bidi-font-style: italic">Streets, the decision to &lsquo / dig deeper&rsquo / into the social history of District Six culminated in the opening of the exhibition, Digging Deeper, in a renovated museum space in 2000. Oral history practice, as means of bringing to light the hidden and erased histories of the area, was embraced by the museum as an empowering methodology which would facilitate memory work around District Six. In tracing the evolution of an oral history practice in the museum, this study aims to understand how the poetics involved in the practices of representation and display impacted on the oral histories that were displayed in Digging Deeper. It also considers how the engagement with the archaeological discipline, during the curation of the Horstley Street display as part of Streets, impacted on how oral histories were displayed in the museum.</span></span></p>

<p>In the natural decay series of 238U an inert radioactive gas, 222Rn (radon) is formed in the decay of 226Ra. Because radon is relatively soluble in water, it migrates from places of its generation in rocks and soils to other places either by soil air, or travels with underground water. Therefore, there is a growing interest among hydrogeologists in using radon as a natural tracer for investigating and managing fresh water reservoirs. This work is aimed at investigating and developing radon-in-water measuring techniques applicable to aquifers and rivers. A gamma-ray spectrometry method using a hyper-pure germanium (HPGe) detector, based at iThemba LABS, Cape Town and Marinelli beakers, has been optimized to measure radon in borehole water via the g-rays associated with the decay of radon daughters 214Pb and 214Bi (in secular equilibrium with their parent). An accuracy better than 5% was achieved. Moreover, long-term measurements of radon in water from an iThemba LABS borehole have been carried out to investigate the role of radon for characterizing aquifers. These investigations led to the development of a simplified physical model that reproduces the time-evolution of radon concentration with borehole pumping and may be used to estimate the time for representative sampling of the aquifer. A novel method is also proposed in this thesis to measure radon-in-water in the field after grab sampling - a so-called quasi in-situ method. The quasi in-situ method involves inserting a y-ray detector in a container of large volume filled with water of interest. The g-ray spectra are analyzed using an approach involving energy intervals on the high-energy part of the spectrum (1.3 &ndash / 3.0 MeV). Each energy interval corresponds to contributions from one of the major g-ray sources: 40K and the decay series of 238U and 232Th, and cosmic rays. It is assumed that the U interval will be dominated by g-rays emitted from the radon daughters (214Pb and 214Bi). Minor contributions to an interval with major radionuclide are corrected using an MCNPX simulated standard spectra. The two methods in this thesis make a significant contribution to measuring and modelling of radon in aquifers and surface waters. It forms a basis for further development in an interactive mode with hydrological applications.</p>