A dissertation submitted as partial fulfilment of the requirements for Master of Urban Design in the Department of Architecture, University of the Witwatersrand, Johannesburg, October 1993 / No abstract supplied.

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A dissertation submitted to the Faculty of Arts, University of tho Witwatersrand, Johannesburg, for the Degree of Mastel' of Arts. Johannesburg 1991 / The industrial supervisor is the classical example of the person in the middle or the 'marginal person' Placed between management and the workforce, supervisors encounter conflicting expectations and demands. For the black supervisor in South African industry, these problems are exacerbated, typically having been promoted from the ranks and operating at an essentially white management, black workforce interface. Previous researchers have discussed the dysfunctional consequences faced by these people and, further, have alluded to the possible relationship between this and supervisors' dual loyaltles. This research examines the marginality of black supervisors and how this relates to their possible dual commitment. Towards this end, a psychometrically sound measure of psychological marginality was constructed, following which an empirical investigation was undertaken to investigate the relationship between black supervisors' psychological marginality and their dual allegiances. Factor analytical techniques revealed that black supervisor's marginality comprises two variables; namely, management marginality and worker marginality. The relationships between both marginality variables and levels of organisational commitment, union commitment and dual commitment were not significant. This suggests that the management and worker marginality experienced among black supervisors is not related to dual commitment, unilateral commitment and alienation. Implications of these findings for theory and practice are discussed and directions for future research provided. The primary shortcoming of the study was small sample sizes as a result of the sensitive nature of the subject. However, this was mediated by the rigorous methodology adopted throughout.

In South Africa, indigenous plant species are used and traded for traditional medicine (muthi) and so are alien plant species. A literature review of 40 previous studies and survey work at various outlets, including muthi markets and muthi shops in Johannesburg, Durban and Pretoria, found that 320 alien plant species are used and/or sold for traditional medicine in South Africa. Fifty three of the 320 species were found to have weed and/or invader status. Surveys at Faraday and Warwick muthi markets in Johannesburg and Durban respectively as well as muthi shops in Johannesburg, Durban and Pretoria were conducted from October 2010 to February 2011. The following aspects regarding the plant material traded were recorded: the differences in the number of volumes traded; the differences in the number of alien species sold in the markets and shops (and also in Indian and Black-owned shops); the source and origins of these and the viability of propagules sold in the muthi trade. The surveys found that 49 alien plant species were sold and approximately 87 x 50kg-size bags of alien plant material was present in the markets and shops during the time of the survey. Muthi shops sold more than double the number of alien plant species than were sold in the markets and the same result was found for Indian versus Black-owned shops. Alien species were either harvested in South Africa, predominantly in KwaZulu-Natal (KZN), or imported from India. Indian-owned muthi shops sold more species imported from India than alien species that were naturalised and harvested in South Africa. In contrast, the majority of alien species sold at markets and Black-owned shops were harvested in KZN. Viability tests found that 24% of alien plant species sold in this study had greater than 50% viability. Six invasive species are traded in low volumes with viable propagules sold for five of these, highlighting a possibility of spreading through the traditional medicine trade. The study concluded that the total trade in alien plant species is trivial in comparison to the trade of indigenous plant species.

Thesis (M.A. (Psychology))--University of the Witwatersrand, Faculty of Humanities, School of Human & Community Development, 2016 / Children often serve daily as language brokers for migrant families in the foreign context of host countries (Morales & Hanson, 2005). Although this is a reality for migrant families around the world, the phenomenon and migrant children continue to be invisible in research (Orellana, 2009). Dehumanization and subtle, daily xenophobic attitudes in the complex linguistic landscape of multilingual South Africa have created the need for children to interpret for parents and other family members even where the common lingua franca of English is shared and is the recognised official medium of communication. The perceived superiority of English and the arrogant dominance of English speakers (Achebe, 2006) have been associated with the new elite of black South Africans who speak fluent English and by extension, black migrant English speakers are similarly perceived as asserting dominance through their dependence on English. Analysing narratives of migrant families, this research project yields that the continual resistance to the English language and other non-South African vernaculars is interlinked with and seems to perpetuate xenophobic attitudes and dehumanization. The anxiety for adult migrants who do not speak local languages is often dealt with by child language brokers who mediate for their parents and other migrants in multiple spaces including informal (e.g. taxis, streets, shops etc.) to more formal spaces such as hospitals and schools. Playing this role suggests adult responsibility for the child, with a possible impact on family dynamics and relations. Although negative feelings of embarrassment are often experienced by parents, these were outweighed by a sense of pride for children being able to help their families, and the sense of security the family feels because of the children’s linguistic capabilities. Traditional family dynamics and roles do not seem to be significantly altered or negatively impacted by children taking on unconventionally ‘adult roles’. Having acculturated faster, understanding the language rules, politics and consequences of not speaking local languages, this research suggests that brokers function for the benefit of the family and use their skills to reduce anxiety related to xenophobic attitudes and dehumanization against parents and peers particularly when moving between spaces, for example, between home and school or work. / GR2017

M.Mus., Faculty of Arts, University of the Witwatersrand, 1998

Research report (L.L.M. (Coursework))--University of the Witwatersrand, Faculty of Commerce, Law and Management, School of Law, 2014

A research report submitted to the Faculty of Commerce, Law and Management, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Management specialising in Entrepreneurship and New Venture Creation Johannesburg, 2016 / Although corporate entrepreneurship has been examined extensively and alike the antecedents of corporate entrepreneurship, have become a key interest to researchers. The examination of organisational and cognitive factors that drive corporate entrepreneurship is an area of study still in its infancy. This research report, aimed to bridge this knowledge gap, by evaluating the effect of transformational leadership and entrepreneurial mindset in enhancing levels of corporate entrepreneurship. This cross-sectional, empirical study is composed of 173 independent samples of management employees, taken from within a major African bank, headquartered in South Africa. The research, based on structural equation modelling, demonstrated that an entrepreneurial mindset and transformational leadership is positively related to higher levels of corporate entrepreneurship. Equally, empirical evidence was discovered, using structural equation modelling and regression analytics, that transformational leadership positively influences the behavioural relationship between the entrepreneurial mindset and corporate entrepreneurship. This occurs through the mediation causal relationship of transformational leadership, between both latent variables, and the bidirectional causal effect between transformational leadership and an entrepreneurial mindset. / MT2016

The relationship between human activity and the environment has created ecological, socio-economic and cultural patterns and feedback mechanisms that govern the presence, distribution and abundance of plant species assemblages. The trade in traditional medicinal plants in South Africa is estimated to be worth approximately R2.9 billion per year with 27 million consumers throughout the country. Bulbous species compose about 14% of the traded medicinal plant species in South Africa, however the majority of research at the species or generic level has concentrated on a limited number of life forms and plant parts and the ecological consequences of harvest and use of commonly used bulb species is poorly known. Ethnobotanical studies generally focus on ‘ethnospecies’ – i.e. the traditional name that a species may be known by. Species-specific evidence of the effects of trade and harvest is needed to provide more clarity on the implications of trade, especially since increased commercialisation of medicinal plants has often resulted in over-harvesting and, in severe cases, near extinction of valued indigenous plants. The overall aim of this study was to determine the ecological consequences, as well as some of the economic implications of harvesting important bulb species for the regional medicinal plant trade. Traditional medicinal bulb species are susceptible to over-exploitation because they are destructively harvested in large quantities. Four perennial bulbous genera were surveyed: two within the Amaryllidaceae (Boophone and Crinum) and two in the Hyacinthaceae (Bowiea and Drimia). Some discrepancies were noted where traders and traditional healers recognised species that have been synonymised by taxonomists. In order to understand the impacts of all recognised forms, original nomenclature was used to describe different bulb forms that had been synonymised. The proposed ‘functional taxonomy’ does not aim to re-examine the taxonomic revisions by previous taxonomists but rather provides a way to identify forms that have no accepted species name. In this way, the impacts on harvesting of different bulb forms can be quantified. Based on this functional taxonomy, the genus name Urginea has been used although Urginea is currently synonymised under Drimia. However, this is only to describe the different bulb form and is not meant to replace the current taxonomic nomenclature. Surveys were conducted in two national level and two small regional level markets to determine the impacts of trade. Bulb characteristics were described and used together with taxonomic literature to produce a key to bulbous species commonly traded in the markets of South Africa. Distribution data and other important information were collected and combined to provide species-specific information. Identification based on vegetative characteristics was possible, with certain features being more useful than others for creating a key. The most useful identification characteristic was the bulb scale type in the Hyacinthaceae together with bulb shape and colour, while bulb size was least useful. For the Amaryllidaceae, bulb colour and characteristics such as tunics cannot always be used due to similarities between species. However, bulb size and shape are helpful indicators and can group species into classes of similar species. Leaf characteristics are very important and may be the only way to accurately identify some species. The adaptation of taxonomic information and previous keys into more ‘vegetative’ friendly keys can provide ethnoecologists with an identification tool not solely based on ethnospecies name. The ability to identify species will allow ethnoecologists to provide more comprehensive assessments on the impact of the trade. The diameter of bulbs sold at Faraday market (Johannesburg), Warwick market (Durban) and smaller Free State markets were recorded for four genera (Bowiea, Boophone, Crinum, and Drimia – including Urginea forms), and the data were used in a variety of ways to determine the effects of trade. Populations of species of anthropogenic importance should show a corresponding decrease in the frequency of individuals in large size-classes and a decreased number of size-classes with time. Size-class distributions of Drimia delagoensis and Bowiea volubilis followed an inverse J-shaped curve, often indicative of a regenerating population (high frequency of small bulbs); however, in this case intense harvesting pressure has resulted in a highly skewed population structure. High rates of harvesting will ultimately result in regeneration failure because smaller bulbs are unable to reach maturity before harvest. All species studied tended towards smaller mean market bulb diameters over time. These trends suggest that without appropriate mitigation, bulb populations will be further impacted in the future. Bulb diameters in the market were also smaller than diameter records collected from herbarium material and literature records. Bowiea volubilis is the most severely impacted by the medicinal plant trade, with approximately 87% of bulbs <4cm in diameter, and significantly smaller than both bulb diameters in medicinal plant markets in 2001 (p<0.0001) and pressed bulbs from several herbaria (p<0.0001). The large bulbed Amaryllidaceae species Boophone disticha and Crinum species also showed a decrease in bulb diameter between the 2001 and 2007 Faraday surveys (by 1.5cm and 2.7cm, respectively), while Urginea epigea (Hyacinthaceae) showed a 1.2cm decrease in mean size in 6 years. Traditional healers, traders and harvesters can provide a wealth of information on species populations in the wild. Trader and harvester preferences may affect the impact of harvesting and trade on wild populations. Information on trader/harvester preferences and perceptions was gathered from Warwick and Free State markets. Overall, the average earnings per month per trader selling medicinal plants were low (approximately R833 in Warwick and R2,100 in Free State). Bulb species contributed 10-40% of the total earnings per trader at Warwick and 10-50% in the Free State markets. The relatively large contributions of bulb species to trader incomes emphasise the importance of popular bulb species economically and socially. The number of bulbs (equivalent in size to the mean bulb diameter) harvested annually was large and provides an order of magnitude estimate of harvesting impacts on medicinal plant species populations. The number of Drimia elata harvested was greatest in the Free State (between 600,000 and 1,400,000 dependent on estimation method). In Warwick, species sold in the largest quantities were D. robusta, Crinum species, B. volubilis and U. epigea (approximately 400,000 – based on actual volume). The high variability of number of bulbs harvested between traders suggests that these numbers should be treated with caution. The number of populations required and the rate of population regeneration needed to sustain harvesting for the traditional medicine trade is extremely high; and, without mitigating factors, the increased commercialisation of the medicinal plant industry may have potentially dramatic, negative implications on popular bulb populations. Social surveys and ethnobotanical work in local markets are the first steps in understanding patterns of demand for particular plant species, and integrated with population structure and size-class distributions, it allows for an amalgamated and complex awareness of the impacts of resource harvesting. With over 30,000 species of animals and plants that are detrimentally affected by trade worldwide, market surveys are increasingly important to provide information on the extent of trade. The varied data collected in this study included: size-class distributions, temporal changes in bulb diameter, volume and number of bulbs harvested, economic value and trader perceptions. Overall, the results suggested that all species studied were negatively impacted by harvesting to various degrees. In South Africa, harvest and trade is sometimes the only form of income generation and harvest can threaten species populations. By quantifying the volume, value and the number of individuals harvested for bulb species, together with perceived scarcity and popularity and place of harvest, a better understanding of the state of the resource-base has been provided. Continued use of market surveys as monitoring tools is important, because in the current (2011) socio-economic context of South Africa, trade and harvest is likely to increase.

A research project submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science. / Rb-Sr emplacement ages of nineteen kimberlites from the Prieska Province vary from 74 to 174 Ma, Their isotopic, whole-rock geochemical signatures and perovskite REE distributions were also determined. Non-micaceous and micaceous kimberlites from the area show similar petrographic, geochemical and isotopic compositions relative to cratonic kimberlites, indicating similar sub-continental mantle source compositions in the two tectonic environments. Transitional varieties of kimberlite, which can be defined petrographically, geochemically and isotopically are also recognised from the area, but are not prevalent in the cratonic environment. The Prieska Province kimberlites are possibly derived by partial melting processes within a subcontinental reservoir characterised by a spectrum of compositions from time-averaged depleted (HllMU) to enriched (Group II). The occurrence of these components in both on- and off-craton settings indicates that the kimberlite source area is not strictly linked to the suberatonic lithosphere. Mantle' plume sources are not favoured because of the variable source compositions and distribution of emplacement ages within the Province. Transitional kimberlites were derived from a source component with mixed character, not yet noted from within the Kaapvaal Craton. This is the first documented example of isotopically transitional kimberlites from southern Africa. / AC2017