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Applications of DNA-barcoding in the identification and understanding of grass invasions in Southern AfricaBrown, Carly January 2014 (has links)
Magister Scientiae (Biodiversity and Conservation Biology) / The spread of invasive species is one of the greatest threats to global biodiversity. Alien plant invasions also have serious economic impact in terms of the delivery of ecosystem goods and services. Studies of biological invasions in southern Africa have tended to overlook grasses (family Poaceae), although there are many naturalised species in the region. Only a few of these, all perennials, have been officially categorised as invasive in South Africa, but in the winter rainfall region of the Western Cape, grass invasion especially by Mediterranean European annuals have also been noted. These grasses can be difficult to identify. DNA barcoding has been suggested as an alternative method of identifying grasses in the hope of facilitating identification of existing invaders and preventing future invasions. In this study a list of all known naturalised grasses in South Africa was compiled, and a DNA barcoding reference database was assembled for these naturalised grass species as well as for native southern African grass species. The two official markers for plant DNA barcoding (rbcLa + matK) were used in barcoding and phylogenetic analyses, both individually and in combination. The barcoding data was assessed for identification efficacy using three distance-based metrics and one tree-based metric in the R package SPIDER, both including and excluding singleton data. This study lists 128 naturalised grass species and subspecies found in South Africa. In the DNA barcoding analyses, matK was found to perform better as a single barcode than rbcLa, with identification success rates of up to 84% for matK and 76% for rbcLa, using the most successful metric which was the Nearest Neighbour criterion for both of these markers in the data sets without singletons. The combined rbcLa + matK data set performed better than either of the two individual markers, with identification success rates of up to 91% in the data without singletons, with the most successful metric again being the Nearest Neighbour criterion. The combined rbcLa + matK data would therefore be the recommended DNA barcode for southern African grasses of the three data sets tested, based on the results of this study. Phylogenetic trees were constructed with the DNA barcoding data using Bayesian Inference (BI) and Maximum Parsimony (MP) to assess the usefulness of the data in phylogenetic studies and to confirm the efficacy of this grass DNA barcoding data when using tree-based methods of identification. Both the matK and combined datasets resolved all of the grass tribes represented in this study as monophyletic, but the rbcLa data did not.
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Translation Practices in a Developmental Context: An Exploration of Public Health Communication in ZambiaChibamba, Mwamba 19 October 2018 (has links)
Translation in Africa has been studied mostly through the prism of postcolonialism and literary studies. Some scholars have argued that this approach restricts translation studies scholarship on and about the continent. The gist of the postcolonial approach lies in the inherent power relations that exist in the inevitable cross-cultural contact arising from colonialism. Of late, some scholars have suggested that it is time to move beyond the post-colony. It is against such a backdrop that this dissertation broaches the study of translation phenomena in Africa from a developmental perspective. This thesis argues that the postcolonial era is not monolithic and that the African condition has evolved over the years. While it acknowledges the legacy of colonialism with all of its devastating consequences, the study understands the concept of the developmental context to offer the perspective of a continent in charge of its own destiny in contrast to the perspective that sees only a victim. Accordingly, this study seeks to explore translation practices within a developmental context and concentrates on one of the most important development issues: health. In line with global health priorities that now approach health from a preventive rather than a curative perspective, health promotion and communication have become central to the development agenda. This dissertation therefore discusses the historical, political, linguistic, socioeconomic, and cultural factors that inevitably affect translation in public health communication in Zambia and, to a lesser extent, the southern African region. While emphasizing the sociological context of the case study, this research takes translation as a cluster concept and a communicative act in order to investigate how translation is practiced. The research involves a contextual analytic exploration of a few selected health communication products. Drawing on Jakobson’s three types of translation, descriptive translation studies, and functionalist theories, this dissertation brings to light the importance of intersemiotic translation in societies that are anchored in oral culture.
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A critical examination of collegiality in the Southern African Catholic Bishops' Conference (SACBC) : towards a local model of collegialityParry, Enrico Valintino 30 November 2005 (has links)
No abstract available / SYS THEOLOGY and THEOL ETHICS / DTH (SYSTEMATIC THEOLOGY)
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Demilitarisation, informal security forces and public (in)security in Africa : Nigeria and South Africa comparedIsima, Jeffrey January 2009 (has links)
In sub-Saharan African countries that have made democratic transition from military rule and military-backed authoritarian regimes, state elites have embarked upon strategies aimed at demilitarising the new democratic political process. Demilitarisation of the state and politics has become an imperative because it is decisive for consolidating democratic politics and for ensuring improvements in public safety and security. Yet the process of such demilitarisation in these countries has often generated a paradox, whereby the reduction of the political influence of state institutions of violence has been associatedw ith rising civil militarism and the prevalenceo f organised violence in the wider society. In these circumstances, taking cognisance of the dangers of civil militarism and other forms of private violence is a priority for designing and implementing demilitarisation strategies and other security reforms in post-authoritarian African states. Reformminded political elites and external supporters need to be sensitive to these dangers or risk perpetuating the shell of electoral democracy that cannot deliver the goal of human security in the region. This dissertation explored how the current approach to demilitarisation is related to the problem of civil militarism by examining the case studies of Nigeria and South Africa. It explains that given the condition of the state in Africa, demilitarisation of politics after transition from military or military-backed authoritarianism contributes to the emergence of civil militarism. Based on this finding, it argues for a comprehensive approach to demilitarisation as a strategy that caters to both state and societal violence in order to mitigate the risks of civil militarism in the process.
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A Legacy of Oppressing: Whiteness and Collective Responsibility for Black Oppression in ZimbabweJanuary 2013 (has links)
abstract: Cecil Rhodes said, "I would annex the planets if I could." This attitude epitomized the views of the white people who colonized Zimbabwe starting in 1890, and thus society was built on the doctrines of discovery, expansion, and subjugation and marginalization of the Native people. For white Zimbabweans in then-Rhodesia the institutionalization of racism privileged their bodies above all others and thus they were collectively responsible for the oppression of black people through white complacency in allowing that system to exist and active involvement in its formation. For my family, who has a four-hundred year history in Southern Africa, coming to this realization - this critical consciousness of their positionality as oppressor - has been a difficult road. Through their struggle made evident is the potential for change for both individuals and nations fighting to overcome the effects of colonization / Dissertation/Thesis / M.A. Social Justice and Human Rights 2013
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Enterprise risk management as a business enablerDu Plessis, Julian Lesley Nebreska 05 June 2012 (has links)
M.Phil. / The premise of this research study was to study the phenomenon of Enterprise Risk Management (ERM) in order to understand the processes and practices of risk management within First National Bank (FNB). Risk management became a favourite topic for discussion in the aftermath of the Global Financial Crisis (GFC). Some analysts, chief financial officers and observers have noted that risk management is to blame for the economic recession and myriad of bank failures that ensue. However, the intention of this research study was not to analyse the GFC or to devote itself entirely to defend risk management and risk managers.
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The Evaulation of test protocols for dispersive soil identification in Southern AfricaMaharaj, Amrita January 2013 (has links)
Dispersive soils are prevalent in many areas of South Africa and the presence of these soils has not only posed a problem in earth dam construction but has led to problems with a number of road projects. The use of dispersive soils in roadway embankments and structures can lead to serious engineering problems if the soils are not accurately identified before use and appropriate mitigation measures taken. Although the causes and consequences of soil dispersion are well understood, the consistent and positive identification of dispersive soils still remains a problem. Many identification methods have been proposed but none has been completely successful.
The current tests used for identification include the pinhole, double hydrometer, crumb and chemical tests, which are generally used in combination to obtain the most reliable outcome. These laboratory tests, however, have not always been entirely consistent, either when used in combination or individually, and it is possible that the reason lies in the actual testing procedures.
Recent investigations have shown that in many cases the identification and classification problems appear to be related to inconsistencies in the test methods and testing protocols. This has been highlighted recently at various conferences and presentations in South Africa, with a recommendation that the problem be investigated fully. The main objective of this project was thus to carry out a detailed investigation into the current methods used for the testing and identification of dispersive soils. The test methods were thoroughly analysed and shortcomings identified. The differences in results and interpretation resulting from different test techniques are examined and solutions to overcome the problems proposed. A further objective of this study is the assessment of the interpretation of results obtained from dispersive soil chemical analysis.
A pilot study was first carried out, which recognized deficiencies in the identification process resulting from problems with the test methods. The pilot study allowed for the identification of these shortcomings in the test methods and their modification. The modified methods were used in the full study to obtain more consistent and reliable results.
The study found the pinhole test as well as the Gerber and Harmse (1987) ESP versus CEC chart to be highly unreliable. The double hydrometer and crumb tests are good indicators of dispersivity if carried out accurately and repeatably using a standard test method. The chemical analysis of the soils should be carried out using the standard methods employed by the Soil Science Society of South Africa. Final rating systems were also found to be unreliable since they put a great deal of weight on the poorly reproducible pinhole test. Emphasis is thus put on the test methods being as simple and unambiguous as possible to promote repeatability and reproducibility of the results. Recommendations are finally made proposing a suite of tests as well as a decision process which should be followed when faced with a potentially dispersive soil.
This investigation was aimed solely at the evaluation of test protocols and not the suitability or specification of limits for any rating systems. This should now be assessed using the standard test methods proposed in this thesis. / Dissertation (MSc)--University of Pretoria, 2013. / gm2014 / Geology / unrestricted
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Analysis of political corruption trends in transitional statesMaguchu, Prosper Simbarashe January 2011 (has links)
Magister Legum - LLM
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The Methodist Church and society in Transvaal (1948-1976)Leleki, Msokoli William 11 May 2005 (has links)
This work seeks to describe and analyze the origins, growth, development, and main features of what can be termed the Methodist Church in the Transvaal Area. Faith in God was the only thing that kept some Christians and Methodists in particular going during those difficult times. Despite a high price to be paid in the struggle, some church groups found it imperative to fight for human liberation as a sign of being obedient to God. This thesis specifically aims at tracing the role played by the Methodist Church in the broader society in the Eastern Transvaal and Swaziland area presently known as the Highveld and Swaziland District looking specifically at the period between 1948 to 1976. The interest is to discover out the Methodist Church's reaction to the introduction and implementation of the apartheid systems. In 1948 the National Party came to power in South Africa bringing with it the formulated policy of apartheid. Any church felt challenged and denied an opportunity to put into action gospel imperatives. During this period the Methodist Church was caught between practicing Gospel imperatives to remain true to herself and being obedient to those in authority to allow herself to be divided along racial lines. For the Methodist Church to claim to be "one and undivided" called for risking to loose properties and being a church without white membership. Interesting enough it was again in the Transvaal in Soweto on the 16th June 1976 when the black students riots marked the turning point in the struggle against apartheid. The social witness of the Methodist Church in the Transvaal during the prescribed period was met with mixed feelings depending as to which side of the fence one found yourself. / Dissertation (MA (Theology))--University of Pretoria, 2006. / Church History and Church Policy / unrestricted
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The journal of the Reverend William Impey, 1838-1847 : a critical study of his work and theologyOwen, David Rhys January 1993 (has links)
William Impey (1818-1896) came to South Africa as a Wesleyan Methodist Missionary in 1839. He held various missionary and colonial appointments until 1860 when he succeeded William Shaw as Chairman of the Albany and Kaffraria District and General Superintendent of Wesleyan Methodist Missions in South-East Africa. Impey's major contribution was in the provision of education for the indigenous peoples of this region, especially as President of Healdtown (1868-1878). This institution eventually became one of the most highly thought of mission education academies in South Africa. To date little has been known of the life and work of William Impey despite his senior position in South African Wesleyan Methodism. J Whiteside's History of the Wesleyan Methodist Church of South Africa, the last comprehensive history of South African Methodism, published in 1906, only devotes a few lines to Impey. He does however make further reference to Impey's work in his section on education. The Methodist Archive at Manchester University, which contains the personal records of all 19th century Wesleyan Methodist ministers, also has very little information about Impey. The reason for this relative lack of information is that he resigned from the Wesleyan Methodist Church in 1878 on doctrinal grounds. Impey came under the influence of 19th century liberal theology and eventually drew the conclusion that he could no longer accept the doctrine of 'eternal punishment'. He believed that the only honest thing for him to do was to resign from the Wesleyan Methodist Church, which he believed required its ministers to adhere to this doctrine. He was accepted for ordination by the Anglican Church and served as a deacon in 1878 and then as a priest until his death in 1896. Impey's journal affords the reader an opportunity to have a glimpse into what life was like for a 19th century missionary living and working in South Africa. Perhaps its particular value lies in the many detailed entries Impey made about his personal spiritual experiences. The aim of this thesis is to place the life's work of William Impey in its historical and theological context in the belief that this will enable us better to understand the 19th century missionaries. It is hoped that this study will make a further contribution to our understanding of both 19th century missionaries and the times in which they lived and worked.
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