Please read the abstract in the section 00front of this document. / Thesis (PhD)--University of Pretoria, 2009. / Science of Religion and Missiology / unrestricted

Au sein de l’hémisphère sud, l’Afrique australe et le sud-ouest de l’océan Indien forment l’une des trois zones préférentielles de développement des interactions entre les tropiques et les moyennes latitudes. Il s’agit de la Zone de Convergence Sud-Indienne (ZCSI) où se forment, principalement en été austral, des systèmes synoptiques (entre 3 et 5 jours) caractérisés par des bandes nuageuses orientées nord-ouest/sud-est : les Talwegs Tropicaux-Tempérés (TTT). Cette recherche doctorale vise à améliorer les connaissances liées aux TTT, avec une étude sur la dynamique associée à ces systèmes et une analyse de leur évolution possible au cours du XXIème siècle. La première partie de l’étude s’attache à identifier les conditions favorables à la formation et au développement des TTT. Une classification en régimes de temps est utilisée pour identifier les TTT d’une part, et les perturbations des moyennes latitudes d’autre part, permettant de mieux documenter la variabilité spatio-temporelle des TTT et les conditions de leur développement. Ces événements sont responsables d’environ 20% des précipitations saisonnières sud-africaines. Cette contribution augmente selon un gradient ouest-est. La comparaison entre les deux classifications confirme que les perturbations des moyennes latitudes sont une condition nécessaire pour le développement de TTT, mais non suffisante. Dans les tropiques, des advections d’humidité depuis l’océan Atlantique tropical associées à un excès d'énergie statique humide sur le canal du Mozambique forment les conditions supplémentaires favorables à la convection atmosphérique profonde à proximité du continent. La seconde partie étudie comment les TTT, les précipitations et de manière plus générale le climat d’Afrique australe, pourraient évoluer au cours du XXIème siècle sous l’effet du forçage radiatif associé aux émissions de gaz à effet de serre (GES). Cette approche est multi-modèle (huit modèles climatiques sont retenus de l’exercice 5 du GIEC) et multi-trajectoire (RCP 8.5 et 2.6). Les huit modèles restituent convenablement les caractéristiques actuelles du climat d’Afrique australe ainsi que les bandes nuageuses associées aux TTT, tant en termes de variabilité spatiale que de fréquence d’occurrences. Sur le XXIème siècle, ils divergent sur l’évolution des précipitations saisonnières (NDJF). En revanche, ils convergent sur l’augmentation des quantités précipitées par jour de pluie sur le sud-est de l’Afrique australe. Ces changements ne sont pas à relier à une évolution spatio-temporelle des TTT, leur structure spatiale, leur fréquence d’occurrence et leur contribution aux précipitations restent stationnaires tout au long du siècle, mais à des événements pluviogènes extrêmes plus fréquents et plus intenses. / In the Southern Hemisphere, Southern Africa and the south-west Indian Ocean are one of the three preferred regions where interactions between the tropics and midlatitudes develop. This is the South Indian Convergence Zone (SICZ), where northwest-southeast oriented cloud bands form at the synoptic scale (between 3 and 5 days). These bands are mainly found during the austral summer and are commonly referred to as tropical temperate troughs (TTTs). This research aims at improving our knowledge related to TTTs, with a study on the dynamics associated with these systems, and an analysis of their possible evolution during the 21st century.The first part of this thesis aims at identifying favorable conditions for the formation and the development of TTTs. Weather regimes analysis is used to identify TTTs on the one hand and mid-latitude perturbations on the other hand, allowing us to better document the spatial and temporal variability of TTTs together with background climate conditions. The events identified account for 20% of seasonal rainfall on average. Their contribution increases according to a west to east gradient. The comparison between these two classifications, partitioned using a k-means clustering, first confirms that midlatitude perturbations are a necessary condition for TTT development, but they are not sufficient. An excess of moist static energy over the Mozambique Channel partly supplied by advections from remote regions (mostly the southern Atlantic basin and the south-west Indian Ocean) form additional conditions favoring deep atmospheric convection over and near the Southern Africa. The second part investigates possible changes in precipitation, TTTs and more generally climate over Southern Africa during the 21st century in response to radiative forcing associated with greenhouse gas emissions (GHG). A multi-model (height climate models taken on the IPCC Fifth Assessment Report) and multi-scenario (RCP 8.5 and 2.6) approach is chosen. All models are skillful to reproduce Southern Africa current climate characteristics and cloud bands associated with TTTs, both in terms of spatial variability and frequency of occurrences. During the 21th century, there is no consensus between the models on the future evolution of seasonal rainfall (NDJF). However, all simulate an increase in the amounts precipitated by rainy day over the south-east part of southern Africa. These changes are not related to an evolution of TTTs: their spatial patterns, frequency of occurrences and contribution to rainfall remain stationary throughout the 21st century, but they associated with extreme rainfall events that become more frequent and more intense.

After highlighting the events that gave rise to the writing of this dissertation, the writer proceeds with a critical analysis of the structural and leadership dynamics of the Baptist Union of Southern Africa (BUSA) from 1960-2005. Beginning with the formation of BUSA in 1877, he shows how that the South African Baptist Missionary Society (SABMS - the Missions arm of BUSA), established in 1892, developed in a parallel manner alongside of BUSA and questions whether the two bodies were over one. Throughout the dissertation, he pointed out how, up to the late eighties, the structural and leadership dynamics of BUSA tended to favour one culture above the others who, in fact, were in the majority. The writer identifies the key trends within each decade from 1960-2005 with regard to BUSA's structural dynamics and views the following two events as causing a major turnaround resulting in great transformation during the 1990's. They were: <ul> <li> The withdrawal of the Black Baptist Convention from BUSA in 1987 and</li> <li> The turbulent 1989 National Assembly in Kimberley</li> </ul> He also asserts that the "affirmative" appointment of the first multi-cultural BUSA Executive in 1997 actually "saved the day" for BUSA and avoided future splits. The writer proceeds to evaluate BUSA's structural dynamics during the period under review in terms of the essential functions of the church, namely, Kerygma (proclamation), diakonia (diaconal service) and koinonia (fellowship). BUSA was strong in Kerygma but weak in Koinonia. He finally concludes that the "separate development mentality" prevalent within BUSA during its formation and the review period was not as a result of Apartheid but, as his research has revealed, namely (i) British colonialism certainly influenced the formation and initial development of BUSA. The cultural divide between "colonial whites" and "emerging blacks" who were accustomed to a social separation between the two groups was certainly a factor. Likewise, the manner in which Europeans perceived the Bantu in the 1870's (ii) The Mission philosophy prevalent in Europe and America round about 1877 was to form native, indigenous churches that would be "self-governing, self-supporting and self-propagating". The motto of the SABMS was "the evangelisation of the Bantu by Bantu". It was felt the young churches arising out of mission work would be independent and not dependent upon or controlled by mother bodies that helped to establish them. It is thus not surprising that BUSA through the SABMS followed the same policy. (iii) The British Baptist ministers who came to South Africa prior to and following the arrival of the 1820 Settlers came with the express purpose to minister to the British immigrants in the Cape and British Kaffraria. Missions to the Bantu was not necessarily a part of their agenda. As indicated in this dissertation , it was the German Baptists and not the British who were key factors in the establishment of the SABMS. (iv) The new SABMS was based upon the British model which saw the Missions Society as an entirely separate entity from the Union, but in close association with it. The unjust policy of apartheid, which was implemented and enforced by the South African Nationalist Government from 1948 to the early nineties, cemented and added the "cherry on the top" of the separate development and ultimate separation between BUSA and the Baptist Convention. It provided the ideal context for continued British colonial thinking and practice with regard to the Bantu. Hence the exclusion of the latter from the main BUSA Leadership structures for most of the period under review. In the final chapter, the writer offers some guidelines which he trusts will prove helpful to future BUSA Leaders and Executives. / Dissertation (MA(Theology))--University of Pretoria, 2009. / Practical Theology / unrestricted

[pt] Partindo da indagação o que filmam os diretores africanos contemporâneos quando, hoje, apontam suas câmeras para as cidades, esta tese empreende uma viagem investigativa por Johannesburgo, Maputo e Harare através dos filmes de diretores africanos em atividade na África Austral. Os cinemas africanos contemporâneos realizados em países como África do Sul, Moçambique e Zimbabwe lidam, ainda hoje, em maior ou menor grau, com os reflexos de modos de produção que tiveram origem no período de dominação colonial. Se, na contemporaneidade, a África do Sul logrou organizar uma estável indústria de cinema no sul do continente africano, países como Moçambique e Zimbabwe ainda sofrem com os reflexos de uma descolonização tardia dos modos de produção cinematográfica. Com a queda do apartheid na África do Sul (1994) e as independências de Moçambique (1975) e Zimbabwe (1980), as cidades, territórios severamente marcados pela segregação perpetrada pelo colonizador, passam a atrair a atenção de cineastas locais, ao se transformarem no palco de acirrados debates acerca da segregação racial e espacial, do direito à terra e à moradia, da mobilidade, da relação campo-cidade, do embate entre tradição e modernidade. As cidades africanas, até certo momento tidas como projetos interrompidos e inacabados do pesadelo colonial, passaram a ser consideradas, em toda a sua complexidade, como a epítome da própria modernidade africana. As imagens dessas cidades modernas, complexas e desiguais, que emergem do cinema contemporâneo local, rasuram ou perturbam o regime dominante de representação do continente africano propagado pelo cinema e pela mídia ocidentais, problematizam visões que prevaleceram nos contextos de luta anticolonial e conquista da independência e contribuem para a renovação do repertório de imagens da África arquivadas pelo Ocidente. Os filmes analisados nesta tese ajudam a criar cartografias outras das cidades africanas levadas às telas. Tais cidades cinemáticas – ao editar, seccionar, justapor, aproximar e eliminar espaços – produzem percepções múltiplas e, às vezes, inesperadas. / [en] Starting from the question what do contemporary African directors film, today, when they point their cameras towards the cities, this thesis undertakes an investigative journey through Johannesburg, Maputo and Harare in the films of African directors currently active in Southern Africa. Contemporary African cinemas produced in countries such as South Africa, Mozambique and Zimbabwe are still dealing, to a greater or lesser extent, with modes of production that originated in the period of colonial domination. If, in contemporary times, South Africa has managed to create a stable film industry in the south of the African continent, countries such as Mozambique and Zimbabwe still suffer from the reflexes of the late decolonization of their modes of film production. With the fall of apartheid in South Africa (1994) and the independence of Mozambique (1975) and Zimbabwe (1980), these cities, territories which are severely marked by the segregation perpetrated by the colonizer, start to attract the attention of local filmmakers, as they become the stage of heated debates regarding racial and spatial segregation, the right to land and to housing, mobility, the relation between countryside and urban life, the clash between tradition and modernity. African cities, for a long time regarded as unfinished and interrupted projects of the colonial nightmare, started to be perceived in all of their complexity, as the epitome of African modern itself. The images of these modern, complex and unequal cities, which emerge from local contemporary cinema, disturb the dominant system of representation of the African continent, propagated by Western cinema and media. They also problematize visions that prevailed in the contexts of anti-colonial struggle and conquest of independence and they contribute to the renewal of the repertoire of African images archived by the West. The films analyzed in this thesis help to create alternate cartographies for the African cities brought to the screen. Such cinematic cities – by means of editing, sectioning, juxtaposing, approximating and eliminating spaces – create perceptions that are multiple and, at times, unexpected.

M. Tech. (Department of Chemistry and Biotechnology, Faculty of Applied and Computer Sciences), Vaal University of Technology. / Context: Pelargonium alchemilliodes L L' Her is an evergreen shrub, cultivated principally for the medicinal essence and decoction in Southern Africa for the treatment of skin problems, and wounds. Objective: the aim of the study was to optimize the extraction of phenolics and flavonoids from P. graveolens by response surface methodology with particular attention on the proliferative and cytotoxic effects on human keratinocytes, as well as the antioxidant and antibacterial activities and also to isolate active compounds. Materials and Methods: The optimization was achieved by Box-Behnken design. Extract, metabolite yields, and minimal inhibitory concentrations (MIC) were determined by gravimetric, spectrophotometric, and microdilution methods, respectively. The antiradical potentials were evaluated using the phosphomolybdate. 2,2-diphenyl-1-picrylhydrazyl, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), and lipid peroxidation assays, the diterpenoids were isolated and purified using open column chromatography, PTLC, and characterized with FTIR, NMR. The kinetics of the lipid protective activity was studied and fitted into models. The proliferative and cytotoxic effects were evaluated using the CellTiter® Blue cell viability and lactate dehydrogenase assay. Results: The regression coefficient r2 ≥ 0.9775 indicated a close correlation between actual and predicted values of the responses. The ideal parameter for the extraction of phenolics and flavonoids by macerations was determined as an extraction time: 9.63-12.01 h, material mass: 2.62-3.00 g, agitation speed: 143.11-197.11 rpm, and solvent volume: 68.06-69.87 mL. The optimal extractable acetone and methanol crude, flavonoids, and phenolic are (28.87±2.15%, 24.11±1.15%), (7.11±1.03 mg QE/g, 5.98±0.87 mg QE/g) and (58.08±0.88 mg GAE/g, 55.91±1.15 mg GAE/g), respectively. The detected different chemical groups of polyphenolic compounds such as alkaloids, saponins , sterols, terpenoids, flavonoids, tannins, phenols and cardiac glycosides from methanol and acetone extracts were in correlation with optimized yields. Two triterpenoids compounds 1-hydroxy-30-norlanosta-6, 8-diene and 1 2,3,4a,8,9,10,10a-octahydro-2-(2-hydroxypent-4-enyl)-4a-vinyl-1H-benzo[c]chromen-6(10bH)-one were isolated form methanol extracts. The main components of essential oils were citronellal (5.99%), citranellol (26.2%), geraniol (8.56%), citronellyl butyrate (20.3%), trans-farnesol (9.53%) and they were characterized by high amounts of oxygenated hydrocarbons (67.6%), followed by sesquterpene hydrocarbons and oxygenated sesquiterpene (9.32%) and the least being mornoterpene hydrocarbons (5.20%). Total antioxidant capacity and reducing power were comparable to standard gallic acid, while the antiradical activity has IC50 value of 0.18±0.03-8.98±0.15 mg/mL. Further, the lipid protective revealed a dose-dependent activity fitting into a pseudo-second-order kinetic model. MIC value of 1.56 mg/mL for extracts was registered against Staphylococcus aureus and salmonella typhi comparable to chloramphenicol. There was a significant (P < 0.05) increase in cell proliferation and viability when the extract was administered at concentrations of ≤50 μg/mL. However, at ≥100 μg/mL concentrations at ≤ 1000 μg/mL for essential oil exhibited a significnt cytotoxicity in comparison to the untreated cell. Conclusion: These biological activities are confirmation of the phytomedicinal application and possible source of pharmaceutical compounds. However, administration of the decoction should take into cognizance the antiproliferative effect at doses ≥100 μg/mL as well as the potential to induce and maintain keratinocyte proliferation at low concentration with an eye on the antiproliferative effect at concentrations ≥100 μg/mL, except the P. Alchemilliodes essential oils at ≤ 1000 μg/mL.

Many African communities are significantly affected by climate change, despite being small contributors to the world's emissions. In Mozambique, the rural Southern region is more vulnerable to climate instability than other rural areas in the country. The purpose of this study is to look at factors that can be vital when deciding whether to stay or to migrate, such as resilience, social sustainability, and development opportunities and challenges. The data was collected through ethnographic fieldwork in a rural community on the Mozambican coast, with the villagers' perspective in the centre of what makes the place relevant to their daily lives. What makes the study village sustain and thrive are the development processes of weather-resistant buildings and developing ideas for more sufficient farming, health, and education. Even though some people migrate from the village to the cities, people often come back as challenges in the village are more familiar and simpler to deal with, development ideas represent a hopeful future for the village, and the villagers' want to live in their community simply because it is home.

Genetically modified (GM) crops gained attention in southern Africa as countries are struggling with food insecurity and poverty to achieve sustainable development. The controversy around GM crops have provoked heated debates. GM crops are often perceived as a global risk to human health and the environment. The research question is what are the perceptions of environmental educators regarding the use of GM crops toward sustainable development. In the Decade of Education for Sustainable Development environmental educators will need to be key role players in addressing crucial issues such as GM crops. Their perceptions hold many implications for educational programmes. Environmental educators interviewed perceive GM crops as a serious issue. As mediators in a multidisciplinary setting between science and society, environmental educators can play a functional role. Open processes that require greater participation, criticality and reflexivity need to be facilitated in a complex biophysical and social context in southern Africa. / Educational Studies / M. Ed.(Environmental Education)

The cost of education at institutions of higher education is very high and is exacerbated by the failure rate among first-year students, in particular. Their inability to cope with academic demands is largely due to their lack of preparation as a result of poor schooling in previously disadvantaged secondary schools. In the light of this, this study was undertaken to determine the academic needs of and strategies for remedial academic support to first-year dental therapy students at Medunsa. A literature review provided a theoretical foundation and highlighted various factors which impede effective study. An empirical investigation used a combination of qualitative and quantitative approaches to explore the needs of first-year dental therapy students at Medunsa. The results corroborated the issues addressed by the literature as constraints to students' success. Diverse strategies for providing academic remedial support for first-year students were discussed based on the literature review and empirical investigation. / Educational Studies / M.Ed. (Psychology of Education)

The study was prompted mainly by the need for and possibility of collaboration or even mutual accreditation of practising chartered accountants and auditors in the countries of Southern Africa. In establishing common ground between these countries of Southern Africa it was found that the countries share not only geographical space but also strong and increasingly important trade links, movement of people between the countries and in some instances a common history, culture and language in the form of English. The current harmonisation process of accounting standards worldwide enhanced this process. A literature study was done emphasising South Africa as part of the Southern African region, with a special emphasis on accountancy education. An analysis of current international co-operation was done with special reference to the current international harmonisation process. As part ofthe background an analysis was done of the current status of the accountancy profession in each Southern African country. As this study was done from a South African perspective, the emphasis was on the views of members of the accounting profession in public practice with regard to greater cooperation in the region in the accountancy field. This was achieved by means of an empirical survey. It was found that the aforesaid professionals are overwhelmingly in support of greater cooperation in the region. They believe that it would enhance the status of individual accounting bodies worldwide~ that costs, information and infrastructure could be shared; and that it would enhance professionalism and improve service to clients. Specific areas were identified where co-operation could be improved, namely that academic training should be harmonised, practical tralning should be interchangeable and agreements should be reached with individual countries. Some concern was expressed that above all, control should be maintained over the standards of academic and practical education. It is recommended that the bodies governing the accountancy establishment in South Africa, especially the South African Institute of Chartered Accountants and the Public Accountants' and Auditors' Board, should increase their current efforts to establish greater formal relations with other countries in the Southern African region. / Auditing / D. Compt. (Accounting Science)

Women today continue to struggle against male-dominated values and norms, and male prejudices, both in society and the Church. This balance of power needs to be altered to free women from the domination of men. The strategies proposed in this dissertation are based on the Christian ethic of justice and equality. Their implementation, I argue, would empower women to resist oppression, independently of men, to achieve liberation and equality so that male-dominated ideologies and structures could no longer oppress. A case study of women ministers in the Methodist Church of Southern Africa revealed discrimination against, and the limitation of the ministries of women clergy. The ethical dilemma of the Church appearing to follow, rather than to lead society on such issues was noted. The attainment of the liberation of women is dependent solely upon themselves and the extent to which they are prepared to take responsibility for their own lives. / M.Th. (Theological Ethics)