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  1. A non-perturbative theory of giant gravitons using AdS/CFT
    Kemp, Garreth James, 2015-05-07T07:25:02Z
    A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy. February 2015. ...
  2. Transformation of the mining sector of South Africa: strategies beyond the life of the Mining Charter in 2014
    Madolo, Nokuhle Vencentin, 2015-05-07T07:30:15Z
    Transformation of the mining sector is imperative in South Africa as it is the backbone of the economy and informs all aspects of competitiveness in the global arena. In addition, it attracts foreign investment. The Mining Charter is an agent of transformation in the mining sector and its continuous ...
  3. Assessment of South African coals in a bubbling fluidised bed combustion testing facility
    Papo, Gladwin Thabo, 2015-05-07T07:35:22Z
    South Africa is one of the world’s largest coal producers and exporters. However the quality of coal being mined is declining and hence beneficiating is required to meet export quality. Through beneficiation, waste coal (discard coal and duff coal) is produced and its accumulation is increasing y ...
  4. Multi-objective optimization of thermo-mechanical modelling of friction stir welding
    Topper, Candice Catherine, 2015-05-07T07:39:57Z
    This research work is primarily focused on the simulation of the thermal effects on the Friction Stir Welding (FSW) process on aluminium alloys for aerospace applications. The main objective is to be able to realistically characterise the thermal input of a FSW process by means of an accurate parame ...
  5. A predictive optimal dispatch and optimal sizing method for a grid-connected PV-diesel-storage system
    Clark, Ronald, 2015-05-07T07:43:59Z
    Hybrid energy systems are becoming a popular means of exploiting natural sources of energy and increasing electrical efficiency in urban settlements. However, effective implementation of these systems relies on a means of optimally sizing and operating the system to ensure the lifetime costs of t ...
  6. Linear and non-linear resource estimation techniques applied in the Kanzi Phosphate project in the Democratic Republic of Congo
    Mudau, Mpfariseni, 2015-05-07T07:48:12Z
    The main aim of this project was to conduct a comparative analysis of the linear and non-linear estimation techniques used for a Kanzi Phosphate Project in the Democratic Republic of Congo. Kanzi phosphate is an elongated sedimentary unit with a north-south strike direction and a fairly flat dip ...
  7. Investigating addition and subtraction strategies of grade 3 learners within the context of a maths club.
    Takane, Thulelah Blessing, 2015-05-07T07:52:59Z
    This study was concerned with any shifts that could be seen in the use of addition and subtraction strategies by Grade (Gr) 3 learners, and the link between these strategies and resources made available to the learners within the context of the Maths Club (MC). The critical questions that I sought t ...
  8. The use of empirical mode decomposition (EMD) and variable length boostrap (VLB) for stochastic rainfall generation
    Nyaga, Muriithi Job, 2015-05-07T07:53:17Z
    This Research Report sets out to find out how the use of Empirical Mode Decomposition (EMD) for block selection impacts on the performance of the Variable Length Bootstrap (VLB) stochastic rainfall generator. Empirical Mode Decomposition (EMD), a relatively new data-adaptive approach, decomposes a t ...
  9. Numerical investigation of heat transfer in one-dimensional longitudinal fins
    Rusagara, Innocent, 2015-05-07T07:56:21Z
    A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy. Johannesburg, 2014. ...
  10. Exploring the link between urban agriculture, food security and the role of community development: a case study of Soweto, South Africa
    Molelu, Obakeng Tendani, 2015-05-07T08:05:29Z
    A dissertation submitted to the Faculty of Science, School of Computational and Applied Mathematics, University of the Witwatersrand, Johannesburg, in fulfilment of requirements for the degree of Master of Science. 10 November 2014. ...