M. Tech. Electrical Engineering. / In a Wireless Local Area Network (WLAN), as the signal travels from the transmitter to the receiver, it experiences various forms of impairments that cause fading and path loss. To cater for this problem, monitoring the link between the transmitter and receiver becomes imperative. This study focuses on the design of a link adaptation algorithm that seeks to improve the quality of service delivery in IEEE 802.11n networks. From the results, it is shown that the Greedy Algorithm (GA) performed far better than that of Auto-Rate-Fallback (ARF) and it is also shown that the Optimal Algorithm (OA) approach outperformed GA and ARF in terms of throughput and efficiency. Simulations results of both proposed algorithms proved to be more efficient than the existing ARF algorithm. Thus, it is shown that the proposed algorithms have the potential of enhancing the quality of service in IEEE 802.11n network.

M. Tech. Chemical Engineering. / Discusses the application of nanotechnology process to offer wholesale benefits in water and wastewater treatment, extremely very few researches have been conducted in this field. Even with the few, studies have mainly focused on using single ion aqueous solution. Such approach is novel but the results may not give true picture of performance of nano-materials. It's known that water quality adversely affect sorption process. It's thus product to use real field water and wastewater to get valuable results. Presently, there is almost no information is open literature regarding the application of nano-scale adsorbents in treating real water and wastewater.

M. Tech. Electrical Engineering. / Proposes a voice and video service that uses context-awareness and Semantic Web technologies to restrict network access to non-privileged users during crisis situations. The laboratory tests show how the service takes over call adission control from the SIP server, rejects non-privileged calls and drops non-privileged ongoing call sessions. OPNet simulations further show how to proposed service improves network performance based on performance parameters such as end-to-end delay time and throughput.

M. Tech. Public Management Tshwane University of Technology 2008. / This research departed from the hypothesis that inadequacies in terms of finances, human resources and infrastructure are what impedes the smooth implementation of the decentrilisation process in Rwanda. This study attempts to identify how the process of decentralisation in Nyarugenge District took place, and what kind of impact different resources and infrastructure had on the process of decentralisation. The study reveals that Rwanda has long suffered impediments to its decentralisation process. Recommendations include improving the financial, human resources and infrastructure aspects.

M. Tech. Electrical Engineering. / Discusses how to find the best set of base station locations in 3G networks that cover a given number of mobile users with a good quality signal at optimal cost, using Genetic algorithms. The selected approach must alleviate the inefficiencies introduced traditional planning approaches.

Thesis (DTech. degree in the Dept. of Mathematics and Statistics.)-Tshwane University of Technology, 2008.

M. Tech. Biotechnology. / Enterobacter sakazakii is an emerging pathogen implicated in serious illness and death in infants associated with consumption of contaminated powdered infant formula. Due to the HIV/AIDS pandemic and an increase in working mothers, the consumption of powdered infant formula is increasing. Unfortunately, isolation and identification methods for E. sakazakii have not yet been validated and standardized. Therefore, five isolation and identification methods for E. sakazakii from literature were evaluated. Subsequently the superior method was used for screening powdered infant formula.and other dairy products from the South African market for the prevalence of E. sakazakii and other Enterobacteriaceae bacteria.

M. Tech. Electrical Engineering. / Aims to analyze, design and develop a transformer-less 5-level converter topology with an improvement in the output waveform and to investigate its suitability for AC/DC, DC/AC and back-to-back configuration.

Thesis (MTech. degree in Mechanical Engineering)--Tshwane University of Technology, 2008. / The sun is known to be the main source of energy to earth. It is further more outstanding since it is clean and comes to the earth with no costs. However, mankind does not utilize most of this precious energy effectively. In South Africa, emerging farmers need their agricultural products preserved in storage or in transit. Solar adsorption cooling machines would be of benefit to these farmers as they do not require any additional source of energy and are completely autonomous. This study presents a theoretical and experimental analysis of a solar assisted adsorption fridge, as well as the cost effectiveness when compared with the vapour compression method. The cooling machine was designed, developed and tested. It does not contain any moving part; nor consume any mechanical energy. The results show that the refrigerator can chill 25 litres of water from 35 to 5 °C per day. Vegetables and fruits with preservation temperatures in the range 4 -10 °C are within the scope of the present system. The best useful cooling obtained was 1785 kJ per day, and the best coefficient of performance was 0.058.

M. Tech. Chemical Engineering. / Discusses the corrosion of mild steel due to sulphate ions together with chloride ions in concrete reinforcement in alkaline media can be limited or even eliminated by the introduction of laser surface irradiation on the mild steel material.