A thesis submitted to the Faculty of Engineering, University of the Witwatersrand, Johannesburg, in fulfillnent of the requirements for the degree of Doctor of Philosophy, 1992 / The self-heating of coal is a problem which concerns the mining industry not only in South Africa, but also in many other countries. This thesis deals with the contouring of spontaneous combustion liabilities (WITS-ERAC index values) of different seams at the Durban Navigation Colliery and the relationship between the WITS-EHAC index values and the properties of the coal samples. In the determination of the spontaneous combustion liabilities 58 different coal samples were tested with an ignition-temperature test apparatus, crossing-point temperature tests and differential thermal analysis were conducted simultaneously. [Abbreviated abstract. Open document to view full version] / MT2017

A dissertation submitted to the Faculty of Science, University of the Witwatersrand, in fulfilment of the requirements for the degree of Master of Science August 2017. / Streamwater chemistry is influenced by several factors that include: geology, soil-geology interactions, land use, climate change, topography, vegetation, mechanical and chemical weathering. The dominance of these factors when determining the chemistry of streamwater varies from one situation to the other. Four different catchments in the Drakensberg were monitored to identify the processes determining temporal and seasonal patterns in streamwater chemistry. The land uses of the catchment include: CP03 (previously afforested, degraded), CP04 (pristine grasslands), CP06 (pristine grasslands) and CP09 (protection from fire). All the catchments were investigated for differences in major ion concentrations, streamwater temperatures, dissolved organic carbon (DOC), dissolved oxygen, pH, conductivity. There were comparisons made between historical and recent data collected at the Cathedral Peak Research Site. Comparisons were made between CP03 and CP06 to identify effects of storm events on streamwater chemistry. CP03 and CP09 had significant statistical differences in terms of major ions. Land use and stormflow path ways were most influential in determining the streamwater chemistry across catchments. / LG2018

A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in partial fulfillment of the requirements for the degree of Master of Science in Engineering (Industrial), 2012 / This research project undertakes to investigate the linkage between firni Net Promoter score and firm growth in the South African context. South African fmns arc selected from the cellular service provider industry and the retail banking service provider industi7 and a primary research study is undertaken to obtain sample data for the respective firms’ Net Promoter scores. Finn revenue is defined as a suitable measure of firm growth and half year time period from 2010 to 201 1 arc defined as periods from which percentage growth rates may be computed. Revenue data for each linn is collected from public sources and an annual percentage growth rate for each firm is calculated from revenue reported for the first half of 2010 to 2011. A data reliability test is perfonned on the Net Promoter data set and the data is found to be non-uniform and preferential, indicating scores which arc not arbitrary. A Pearson’s correlation analysis is performed to measure the strength of relationship between the Net Promoter scores and percentage firm revenue growth rates. The results of the Pearson correlation analysis indicates a relatively stronger linear relationship between Net Promoter scores and percentage firm revenue growth for the South African cellular service provider industry segment (0.9932) and a relatively weaker linear relationship between that and the South African retail banking industry segment (0.4752). This research finds that there is a positive linkage between Net Promoter scores and revenue growth rates which is consistent with previous research undertaken on the subject. / WS2017

Thesis (M.A. (History)) --University of Limpopo, 2008 / Refer to document

Thesis (M.Dev.) --University of Limpopo, 2006 / Nutrition is a basic human right as well as a prerequisite for the realization of full intellectual and physical potential. This is also stipulated in the South African Constitution and the Bill of rights. The Limpopo Province is known as one of the most poverty and drought stricken provinces in the RSA with a very high rate of unemployment. To alleviate poverty and to improve health and school attendance, the state president enhanced the Primary School Nutrition Programme on 1 September1994 in a number of targeted primary schools according to their poverty level. This study focused on the formative phase of the evaluation of the Primary School Nutrition Programme in the Mogodumo Circuit of the Capricorn District in the Limpopo province. It is a formative phase as it is an ongoing process. Mogodumo circuit is situated ± 56 km, west of Polokwane City, with 90% of the primary schools situated in the rural area. For this study, the researcher employed the probability sampling method in two stages. A simple random sampling of five schools selected was done while the stratified sample was obtained at each of those five selected schools. Through qualitative research, the qualitative data were obtained through a questionnaire, interviews and observation. The final results from the study show that though the learners’ school attendance had improved, they (learners) were eating the food because “beggars are not choosers”. The food they were receiving was of a poor quality, not delicious and not according to the tender specifications. There were no community involvement in the education of their children, unfaithful suppliers and helper mothers (volunteers), principals were forced to sign for the quality of food that was not received, passive participation of the teachers and their involvement in the decision making of the PSNP issues, a lack of facilities such as water, electricity, kitchens and fences. The helper mothers (volunteers) were complaining about the heavy job they were doing without a living wage as they only received a thankyou token of R110-00 per month. The programme was thus functioning in contradiction to rules and policies laid down for it. / Limpopo Department of Education

Thesis (M.Sc. (Microbiology)) --University of Limpopo, 2015 / Five plant species: Ziziphus mucronata, Senna italica, Lantana camara, Ricinus communis and Lippia javanica, were selected for this study based on their use in traditional medicine. In preliminary screening, crude extracts were prepared using hexane, dichloromethane (dcm), acetone and methanol. Phytochemical profiles on Thin Layer Chromatography plates of the extracts were obtained by developing the plates in mobile phases of varying polarity. Tests for compounds such as tannins, flavonoids, alkaloids, phlobatannins, terpenes, steroids, cardiac glycosides and saponins were carried out. Antibacterial activity of the extracts was carried out using microdilution assay for Minimum Inhibitory Concentration and bioautography against Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Enterococcus faecalis. Antioxidant activity of the extracts was performed using the 2, 2, diphenyl-1-picrylhydrazyl (DPPH) assay. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) (MTT) assay and Phagoburst test were used to investigate the toxic effects and anti-inflammatory activity of the extracts on mouse Raw 264.7 macrophage cells, respectively. The presence of phytochemicals was observed on the chromatograms after the plates were sprayed with vanillin sulphuric acid reagent. The dcm extracts of the plants showed antibacterial activity against the selected bacterial species on the bioautograms. Senna italica and Z. mucronata showed the most activity bands on the bioautograms. Lippia javanica had the lowest MIC average of 0.56 mg/ml. Antioxidant activity was observed in the extracts of L. javanica and R. communis. The extracts promoted proliferation of the mouse macrophage cells Raw 264.7 at concentrations ranging from 0.31 mg/ml and 0.08 mg/ml. Senna italica leaves were selected for isolation of antibacterial compounds. The isolated compound was analysed on 1H and 13C nuclear magnetic resonance (NMR) and Mass Spectrometry (MS) for structural analysis. The structure could not be elucidated due to impurities in the compound but the tentative structure is a branched chain alkane with at least one ether linkage per repeating unit. Therefore the study shows that there are plant components with biological activities against wound infecting bacteria and a single lead compound was identified. / the National Research Foundation

Diss. Luleå : Luleå tekniska univ., 2007.

M. Tech. Architecture (Professional) / This dissertation encompasses the development of a new explorative centre for public fire safety education, within the inner city of Pretoria. This centre would serve as the new Northern Gauteng public hub of the Fire Protection Association of Southern Africa (FPASA) The proposal arises from the FPASA's current expansion needs. Their existing facility, based in Boksburg, is fast becoming too small and outdated to cater for the needs of the growing industry. This new facility will function as a public fire safety information hub, dealing with various fields of fire related protection and prevention training, for both private and public participants. This could serve to equip people with the knowledge and experience needed to more adequately protect themselves, their loved ones, as well as their personal belongings from damage or destruction by fire. The site selected for this scheme is situated within the currently dormant Museum Park District of the Pretoria central business district (CBD). The site, as well as its surrounding urban environment provides unique opportunities for the development of a new public-orientated fire safety education centre, which can focus on exposure in a pedestrian rich context. The FPASA's requirements, along with the site chosen for this new facility, provide unique opportunities for the development of a new active public typology within the city. The building should evoke curiosity as well as encourage explorative socio-educational behaviour. Through architectural form, public space, and didactically based educational programmes, this new public facility should attempt to reunite the individual with the built environment, while reaching out to expose the serious issue of fire safety education.

D. Tech. Informatics / In the world of information and communications technology (ICT), collaboration plays a central and significant role towards development and economic growth. Collaboration is relevant for all spheres, starting with individuals, organizations, private businesses, governments, and specifically research institutions which focus on research and innovation. In the academia, e-collaboration has become part of the survival strategy and is also essential to ensure continuity, competitiveness, growth and maturity. ARIs (Academic and Research Institutions) must plan on how e-collaboration is applied and improved in organizations. The main research objective for this study was to propose an e-Collaboration Maturity Model for ARIs. In support of this four secondary objectives were listed as follows: To investigate collaboration initiatives and technology amongst ARIs; To understand the driving forces and challenges towards Collaboration amongst ARIs; To explore the themes of e-Collaboration; To review maturity and assessment models.

M. Tech. Architecture: Professional / The origins of the Apies River within Fountains Valley, established the foundation of the city of Pretoria as well as the inspiration for this design. The significance of Fountains resides not only in its natural features but also its historical and cultural layers, forming a complex matrix of time and influence. The proposal explores the potential role that architecture plays in the conservation of Pretoria's cultural waterscapes, through the process of fabric renewal and public engagement. The study identifies the need for a hydrological research and conservation facility within Fountains Valley, unifying the significance of the site which stems from natural features as well as historical and cultural layers. Fountains Valley currently forms a place with cultural value, leisure and recreation opportunities, and an escape from the busy city. The proposed intervention consists of a cultural waterscape that creates a new relationship between people and nature. The future built landscape will be a platform and catalyst which researches, informs, and preserves Pretoria's natural spaces and aims to facilitate the integration of a hydro-logical research facility within a cultural recreational park.