Journalism sourcing and credibility: a study of Raia Mwema’s use of anonymous sources
- Authors: Mkoko, Egbert
- Date: 2014
- Subjects: Raia Mwema , Newspapers -- Tanzania , Journalism -- Tanzania , Attribution of news -- Tanzania
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3529 , http://hdl.handle.net/10962/d1013219
- Description: This study analyses how readers impute credibility to the Tanzanian investigative newspaper Raia Mwema which, as a matter of routine journalistic practice, uses a high number of anonymous sources. Against the backdrop of a strong theoretical position, espoused by media studies theorists in both Western media contexts and in Africa, in which this practice is deemed to diminish the credibility of both journalists and their stories, the study’s main purpose is to examine how readers make sense of this very prevalent practice in a country that has recently opened up to media plurality. It also investigates where they locate the source of credibility for this high-selling newspaper, if not in the traditional way through its named sources of information. The study surveys the frequency of appearance of anonymous sources in this newspaper for the period of one year from January 2011 to December 2011. Then the study considered how this practice is viewed and understood by the wider journalistic community in Tanzania as well as looking into how the journalists and owners of Raia Mwema make choices about attributing their journalism. Lastly, the study engaged with particular readers to understand what sense they make of this practice in the wider landscape of Tanzanian media and the post-repressive political situation. The study makes use of theories of the sociology of news production so as to understand the context in which Raia Mwema has routinised the practice of anonymous attribution and whether the journalistic community and newspaper readers find the practice credible. The study also employs reception analysis in order to understand to what extent Raia Mwema readers negotiate and make sense of the mainly political, and often critical, media messages they get from newspaper. In this way, it introduces the importance of the reader in the production of meaning and of assessment of credibility of journalism. The interviews – ranging from journalists working at the paper, through the wider journalistic community and taking in the readership of the paper – show that theoretical considerations of journalistic credibility must take into account the political, social and media context in which journalism is produced. Pronouncements on the overuse of anonymous sources, without understanding the way readers and journalists negotiate the complexities of an actual situation, do not tell us much about credibility and how readers understand the messages they are given. From this study, it is clear that in African countries embarking on opening media systems, credibility involves more factors than have been discussed in the literature and that readers and journalists are sophisticated consumers and producers of media messages in countries that place a host of obstacles in the way of investigative journalism and open political communication.
- Full Text:
- Date Issued: 2014
- Authors: Mkoko, Egbert
- Date: 2014
- Subjects: Raia Mwema , Newspapers -- Tanzania , Journalism -- Tanzania , Attribution of news -- Tanzania
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3529 , http://hdl.handle.net/10962/d1013219
- Description: This study analyses how readers impute credibility to the Tanzanian investigative newspaper Raia Mwema which, as a matter of routine journalistic practice, uses a high number of anonymous sources. Against the backdrop of a strong theoretical position, espoused by media studies theorists in both Western media contexts and in Africa, in which this practice is deemed to diminish the credibility of both journalists and their stories, the study’s main purpose is to examine how readers make sense of this very prevalent practice in a country that has recently opened up to media plurality. It also investigates where they locate the source of credibility for this high-selling newspaper, if not in the traditional way through its named sources of information. The study surveys the frequency of appearance of anonymous sources in this newspaper for the period of one year from January 2011 to December 2011. Then the study considered how this practice is viewed and understood by the wider journalistic community in Tanzania as well as looking into how the journalists and owners of Raia Mwema make choices about attributing their journalism. Lastly, the study engaged with particular readers to understand what sense they make of this practice in the wider landscape of Tanzanian media and the post-repressive political situation. The study makes use of theories of the sociology of news production so as to understand the context in which Raia Mwema has routinised the practice of anonymous attribution and whether the journalistic community and newspaper readers find the practice credible. The study also employs reception analysis in order to understand to what extent Raia Mwema readers negotiate and make sense of the mainly political, and often critical, media messages they get from newspaper. In this way, it introduces the importance of the reader in the production of meaning and of assessment of credibility of journalism. The interviews – ranging from journalists working at the paper, through the wider journalistic community and taking in the readership of the paper – show that theoretical considerations of journalistic credibility must take into account the political, social and media context in which journalism is produced. Pronouncements on the overuse of anonymous sources, without understanding the way readers and journalists negotiate the complexities of an actual situation, do not tell us much about credibility and how readers understand the messages they are given. From this study, it is clear that in African countries embarking on opening media systems, credibility involves more factors than have been discussed in the literature and that readers and journalists are sophisticated consumers and producers of media messages in countries that place a host of obstacles in the way of investigative journalism and open political communication.
- Full Text:
- Date Issued: 2014
Kaffirmeid and other stories
- Authors: Madingwane, June
- Date: 2014
- Subjects: South African fiction (English) -- 21st century , Short stories, South African -- 21st century , Creative writing (Higher education) -- Research -- South Africa , Creative writing -- Fiction , South African fiction (English) -- Study and teaching (Higher)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:5983 , http://hdl.handle.net/10962/d1015659
- Description: These stories are about people’s experiences in relationships and how they overcome and resolve problems with their partners. Some explore myths and unexplained occurrences that raise many questions.
- Full Text:
- Date Issued: 2014
- Authors: Madingwane, June
- Date: 2014
- Subjects: South African fiction (English) -- 21st century , Short stories, South African -- 21st century , Creative writing (Higher education) -- Research -- South Africa , Creative writing -- Fiction , South African fiction (English) -- Study and teaching (Higher)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:5983 , http://hdl.handle.net/10962/d1015659
- Description: These stories are about people’s experiences in relationships and how they overcome and resolve problems with their partners. Some explore myths and unexplained occurrences that raise many questions.
- Full Text:
- Date Issued: 2014
Kedibone
- Authors: Mokae, Sabata Paul
- Date: 2014
- Subjects: Creative writing (Higher education) -- Research -- South Africa , Creative writing -- Fiction , South African fiction (English) -- Study and teaching (Higher) , South African fiction (English) -- 21st century
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:6000 , http://hdl.handle.net/10962/d1020883
- Description: A young woman from a rural village near Kimberley is killed by her husband in a fit of jealousy. Her illiterate mother is summoned to the hospital to authorize the removal of vital organs – eyes, liver, kidney and heart – for organ donation. But some members of the family feel that their child should not be buried with parts of her body missing. Thus begins a story that changes the lives of many people, both black and white, over the following twenty years.
- Full Text:
- Date Issued: 2014
- Authors: Mokae, Sabata Paul
- Date: 2014
- Subjects: Creative writing (Higher education) -- Research -- South Africa , Creative writing -- Fiction , South African fiction (English) -- Study and teaching (Higher) , South African fiction (English) -- 21st century
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:6000 , http://hdl.handle.net/10962/d1020883
- Description: A young woman from a rural village near Kimberley is killed by her husband in a fit of jealousy. Her illiterate mother is summoned to the hospital to authorize the removal of vital organs – eyes, liver, kidney and heart – for organ donation. But some members of the family feel that their child should not be buried with parts of her body missing. Thus begins a story that changes the lives of many people, both black and white, over the following twenty years.
- Full Text:
- Date Issued: 2014
Knowledge and knowing in the public management and public administration programmes at a comprehensive university
- Authors: Lück, Jacqueline Catherine
- Date: 2014
- Subjects: Knowledge and learning , Public administration -- Study and teaching (Higher) , Knowledge, Sociology of , Learning, Psychology of , Knowledge, Theory of , Educational equalization -- South Africa , Education, Higher -- South Africa , Literacy -- South Africa , Technical institutes -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1326 , http://hdl.handle.net/10962/d1013166
- Description: Knowledge is often tacit and under researched in educational fields. In order for student access to knowledge and its related academic discourses to be facilitated, a deep understanding needs to be gained of the form that this knowledge takes. This study interrogates the ways in which knowledge is constituted in the first year of a Public Management Diploma and a Public Administration Degree at a comprehensive university in South Africa. The study takes a social realist approach that understands reality as fact but sees our knowledge thereof as a social phenomenon. The study was concerned with knowledge structures and knower structures as it argues that these have not been adequately accounted for in the sociology of education research. But this study comes to this concern from a strongly ideological view of student reading and writing. This study calls on a social practices approach that sees literacy as embedded within specific academic discourses, which vary from context to context. It uses this ideological understanding of literacy as the orienting framework for the study of knowledge. The study takes place in a Higher Education mileu that has begun to transform from its divisive past. The transformation brought about new institutional formations such as the comprehensive university, with its mix of vocational, professional and formative programmes and varied emphasis on contextual and conceptual curriculum coherence. Increasingly, the transformation agenda also shifts concern from simply providing physical access to a previously disenfranchised majority to ensuring full participation in the context of high attrition rates in first year and low retention rates. The data was analysed using the Specialisation Codes of Legitimation Code Theory to see what was being specialised in the Diploma and Degree curricula of the Public Management and Administration fields. These fields are characterised in the literature by ongoing tensions about focus, and perceptions of there being a theoretical vacuum and an inability to deal adequately with challenges in the South African public sector. Analysis of lecturer interviews and first-year curriculum documentation showed that both the Public Management Diploma and Public Administration Degree have stronger epistemic relations (ER), with an emphasis on claims to knowledge of the world. The data showed relatively weak social relations (SR), in that there was not the valuing of a particular lens on the world or a specific disposition required for legitimation within this field. The combination of ER+ and SR- indicates that these curricula are Knowledge Codes, where legitimation is through the acquisition of a set of skills and procedures. The programmes were characterised by fairly low-level procedural knowledge, which may point to a workplace-oriented direction that is dominant in the comprehensive university. In keeping with concerns raised in the literature about this field, there was little evidence of theoretical or propositional knowledge in the Public Management Diploma and while the Public Administration Degree had some evidence of this, it was arguably not to the extent expected of a degree as described in the National Qualifications Framework. This study was limited to the first-year of the Diploma and Degree and subsequent years could present different findings. Lecturers showed awareness of student challenges with literacy practices and made concerned attempts through various interventions to address this but they were found to value the surface features of writing practices over personal engagement with the knowledge. Though the expectations of student literacy practices in tests and assignments were aligned to the ways in which knowledge was constructed in the curriculum, there was little evidence of student induction into disciplinary discourses of the field as knowledge was presented as being neutral and student writing primarily took the form of retelling objective facts. The implications of these findings could include student exclusion from higher-level academic discourse, more powerful knowledge in the workplace and, finally, constrain them from becoming producers of knowledge.
- Full Text:
- Date Issued: 2014
- Authors: Lück, Jacqueline Catherine
- Date: 2014
- Subjects: Knowledge and learning , Public administration -- Study and teaching (Higher) , Knowledge, Sociology of , Learning, Psychology of , Knowledge, Theory of , Educational equalization -- South Africa , Education, Higher -- South Africa , Literacy -- South Africa , Technical institutes -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1326 , http://hdl.handle.net/10962/d1013166
- Description: Knowledge is often tacit and under researched in educational fields. In order for student access to knowledge and its related academic discourses to be facilitated, a deep understanding needs to be gained of the form that this knowledge takes. This study interrogates the ways in which knowledge is constituted in the first year of a Public Management Diploma and a Public Administration Degree at a comprehensive university in South Africa. The study takes a social realist approach that understands reality as fact but sees our knowledge thereof as a social phenomenon. The study was concerned with knowledge structures and knower structures as it argues that these have not been adequately accounted for in the sociology of education research. But this study comes to this concern from a strongly ideological view of student reading and writing. This study calls on a social practices approach that sees literacy as embedded within specific academic discourses, which vary from context to context. It uses this ideological understanding of literacy as the orienting framework for the study of knowledge. The study takes place in a Higher Education mileu that has begun to transform from its divisive past. The transformation brought about new institutional formations such as the comprehensive university, with its mix of vocational, professional and formative programmes and varied emphasis on contextual and conceptual curriculum coherence. Increasingly, the transformation agenda also shifts concern from simply providing physical access to a previously disenfranchised majority to ensuring full participation in the context of high attrition rates in first year and low retention rates. The data was analysed using the Specialisation Codes of Legitimation Code Theory to see what was being specialised in the Diploma and Degree curricula of the Public Management and Administration fields. These fields are characterised in the literature by ongoing tensions about focus, and perceptions of there being a theoretical vacuum and an inability to deal adequately with challenges in the South African public sector. Analysis of lecturer interviews and first-year curriculum documentation showed that both the Public Management Diploma and Public Administration Degree have stronger epistemic relations (ER), with an emphasis on claims to knowledge of the world. The data showed relatively weak social relations (SR), in that there was not the valuing of a particular lens on the world or a specific disposition required for legitimation within this field. The combination of ER+ and SR- indicates that these curricula are Knowledge Codes, where legitimation is through the acquisition of a set of skills and procedures. The programmes were characterised by fairly low-level procedural knowledge, which may point to a workplace-oriented direction that is dominant in the comprehensive university. In keeping with concerns raised in the literature about this field, there was little evidence of theoretical or propositional knowledge in the Public Management Diploma and while the Public Administration Degree had some evidence of this, it was arguably not to the extent expected of a degree as described in the National Qualifications Framework. This study was limited to the first-year of the Diploma and Degree and subsequent years could present different findings. Lecturers showed awareness of student challenges with literacy practices and made concerned attempts through various interventions to address this but they were found to value the surface features of writing practices over personal engagement with the knowledge. Though the expectations of student literacy practices in tests and assignments were aligned to the ways in which knowledge was constructed in the curriculum, there was little evidence of student induction into disciplinary discourses of the field as knowledge was presented as being neutral and student writing primarily took the form of retelling objective facts. The implications of these findings could include student exclusion from higher-level academic discourse, more powerful knowledge in the workplace and, finally, constrain them from becoming producers of knowledge.
- Full Text:
- Date Issued: 2014
Knowledge management as a tool to enhance innovative thinking in an organisation
- Authors: Kenqa, Bandile
- Date: 2014
- Subjects: Knowledge management Organizational learning
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11026 , vital:26878
- Description: The twenty-first century is an era where corporate and small businesses alike have to give way to what has been termed the ‘knowledge era’. Knowledge management is regarded as the most important factor in the mainstream of the business fraternity in ensuring sustainability within organisations. Because knowledge management is an integral part of managerial activity in a number of organisations, the broader economic environment and social life today, it is imperative that organisations must be knowledge-driven. Equally important are the associated knowledge management implementation strategies. Based on the literature study and the survey of the branch managerial teams in FNB branches in the Nelson Mandela Metropolitan in Port Elizabeth, it was concluded that FNB partly applied specified concepts to embrace an innovation culture in the organisation. The concepts specified included innovative competency, leadership initiative, customer engagement, staff engagement and personal desire, at both individual and FNB level. In order to attain the objective of the empirical study, survey results were evaluated in order to establish whether the above mentioned concepts were applied. A sample of fifty five (55) managerial members from fifteen (15) branches were surveyed. The responses obtained from the respondents were analysed and compared with the matters raised in the literature review. Leadership initiative appeared to be the most important critical factor in driving knowledge management culture in the organisation. However, it was established that personal desire, both at individual and FNB level, were misaligned to knowledge management. This implied that the organisation was not yielding full benefits from their employees in ensuring that management optimise on the employees’ skills, qualifications and expertise. Conclusions, research gaps and recommendations were formulated for the FNB’s promotion of innovative competency, leadership initiative, customer engagement, staff engagement and personal desire, both at individual and FNB levels. The empirical results were satisfactory and informative. Leadership initiative appeared to be the most critical factor in driving knowledge management culture in the organisation.
- Full Text:
- Date Issued: 2014
- Authors: Kenqa, Bandile
- Date: 2014
- Subjects: Knowledge management Organizational learning
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11026 , vital:26878
- Description: The twenty-first century is an era where corporate and small businesses alike have to give way to what has been termed the ‘knowledge era’. Knowledge management is regarded as the most important factor in the mainstream of the business fraternity in ensuring sustainability within organisations. Because knowledge management is an integral part of managerial activity in a number of organisations, the broader economic environment and social life today, it is imperative that organisations must be knowledge-driven. Equally important are the associated knowledge management implementation strategies. Based on the literature study and the survey of the branch managerial teams in FNB branches in the Nelson Mandela Metropolitan in Port Elizabeth, it was concluded that FNB partly applied specified concepts to embrace an innovation culture in the organisation. The concepts specified included innovative competency, leadership initiative, customer engagement, staff engagement and personal desire, at both individual and FNB level. In order to attain the objective of the empirical study, survey results were evaluated in order to establish whether the above mentioned concepts were applied. A sample of fifty five (55) managerial members from fifteen (15) branches were surveyed. The responses obtained from the respondents were analysed and compared with the matters raised in the literature review. Leadership initiative appeared to be the most important critical factor in driving knowledge management culture in the organisation. However, it was established that personal desire, both at individual and FNB level, were misaligned to knowledge management. This implied that the organisation was not yielding full benefits from their employees in ensuring that management optimise on the employees’ skills, qualifications and expertise. Conclusions, research gaps and recommendations were formulated for the FNB’s promotion of innovative competency, leadership initiative, customer engagement, staff engagement and personal desire, both at individual and FNB levels. The empirical results were satisfactory and informative. Leadership initiative appeared to be the most critical factor in driving knowledge management culture in the organisation.
- Full Text:
- Date Issued: 2014
Land redistribution and state decentralisation in South Africa
- Authors: Jaricha, Desmond Tichaona
- Date: 2014
- Subjects: Land reform -- South Africa , Land tenure -- South Africa , Agriculture -- Economic aspects -- South Africa , Decentralization in government -- South Africa , Local government -- South Africa , South Africa -- Politics and government
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3374 , http://hdl.handle.net/10962/d1013120
- Description: South Africa is a new democracy that has had to deal with many historical remnants of apartheid. One of the main remnants has been land dispossession and massive inequalities along racial lines of access to land for agricultural purposes. In countering this, the post-apartheid state has pursued land redistribution programmes since the end of apartheid in 1994, as part of a broader land reform project. Simultaneously, post-apartheid South Africa has been marked by significant state restructuring notably a process of state de-centralisation including the positioning of municipalities as development agents. Amongst other goals, this is designed to democratise the state given the authoritarian and exclusive character of the apartheid state, and thereby to democratise development initiatives and programmes. Land redistribution and state decentralisation in South Africa are different political processes with their own specific dynamics. They have though become interlinked and intertwined but not necessarily in a coherent and integrated manner. Within broader global developments pertaining to state decentralisation and land redistribution, the thesis examines the complex relations between these two processes in South Africa. In particular, I analyse critically the decentralised character of the land redistribution programme in South Africa. In order to concretise and illustrate key themes and points, I discuss a particular land redistribution project called Masizakhe located in Makana Municipality in the Eastern Cape Province.
- Full Text:
- Date Issued: 2014
- Authors: Jaricha, Desmond Tichaona
- Date: 2014
- Subjects: Land reform -- South Africa , Land tenure -- South Africa , Agriculture -- Economic aspects -- South Africa , Decentralization in government -- South Africa , Local government -- South Africa , South Africa -- Politics and government
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3374 , http://hdl.handle.net/10962/d1013120
- Description: South Africa is a new democracy that has had to deal with many historical remnants of apartheid. One of the main remnants has been land dispossession and massive inequalities along racial lines of access to land for agricultural purposes. In countering this, the post-apartheid state has pursued land redistribution programmes since the end of apartheid in 1994, as part of a broader land reform project. Simultaneously, post-apartheid South Africa has been marked by significant state restructuring notably a process of state de-centralisation including the positioning of municipalities as development agents. Amongst other goals, this is designed to democratise the state given the authoritarian and exclusive character of the apartheid state, and thereby to democratise development initiatives and programmes. Land redistribution and state decentralisation in South Africa are different political processes with their own specific dynamics. They have though become interlinked and intertwined but not necessarily in a coherent and integrated manner. Within broader global developments pertaining to state decentralisation and land redistribution, the thesis examines the complex relations between these two processes in South Africa. In particular, I analyse critically the decentralised character of the land redistribution programme in South Africa. In order to concretise and illustrate key themes and points, I discuss a particular land redistribution project called Masizakhe located in Makana Municipality in the Eastern Cape Province.
- Full Text:
- Date Issued: 2014
Laser bending of commercially pure grade 2 titanium alloy plates: mechanisms analysis and characterisation of mechanical properties
- Authors: Mjali, Kadephi Vuyolwethu
- Date: 2014
- Subjects: Materials -- Mechanical properties , Bending , Titanium-aluminum alloys
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:9642 , http://hdl.handle.net/10948/d1021147
- Description: The processing of materials has become a specialist field and the industry will continue to grow due to rising costs in labour and raw materials which has forced many automotive industry suppliers to invest heavily in this field. In order to be relevant and competitive in today’s industrial world, companies in South Africa are now forced to dedicate billions of rands in profits to research and development. Metals like titanium are finding favour with automotive and aviation companies in pursuit of savings in fuel consumption. This saving is achieved by reducing weight on aircraft and automobiles yet still meeting acceptable and improved structural integrity. In-depth research into the behaviour of various materials under varying loading conditions is therefore essential. The study on the processing of commercially pure grade 2 titanium alloy plates focuses on the development of process parameters for bending the material using a 4kW Nd: YAG laser to an approximate radius of curvature of 120mm. The resulting mechanical properties of laser formed plates are then compared to those obtained from mechanically formed samples. The titanium parent material was used to benchmark the performance of formed samples. The effect of process parameters on the mechanical properties and structural integrity also formed part of this study. To obtain the bending parameters for laser forming, various combinations of processing speeds and laser powers were used. The line energy is dependent on the power and scanning velocity parameters and these are shown in table 1. The laser power, line energy and scanning velocity were the main parameters controlled in this study and the beam diameter remained unchanged. Residual stress analysis, micro-hardness and fatigue life testing were carried out to analyse mechanical properties and the structural integrity of the plate samples. Microstructural analysis was also done to observe changes in the material as a result of the forming processes. From the results it is evident that laser forming is beneficial to the hardness of titanium but detrimental to the fatigue life at higher line energies. Residual stress analysis showed the amount of stress within the study samples increased with each forming operation. This information was vital in the analysis of the fatigue life of titanium. A fatigue life prediction model was developed from this study and it shed some light on the behaviour of titanium in fatigue testing. The model could be used to predict fatigue life when no fatigue data is available for commercially pure grade 2 titanium alloy plates. In conclusion, this study helped establish parameters that could be used to bend titanium while the analysis of mechanical properties showed the limits of working with this alloy.
- Full Text:
- Date Issued: 2014
- Authors: Mjali, Kadephi Vuyolwethu
- Date: 2014
- Subjects: Materials -- Mechanical properties , Bending , Titanium-aluminum alloys
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:9642 , http://hdl.handle.net/10948/d1021147
- Description: The processing of materials has become a specialist field and the industry will continue to grow due to rising costs in labour and raw materials which has forced many automotive industry suppliers to invest heavily in this field. In order to be relevant and competitive in today’s industrial world, companies in South Africa are now forced to dedicate billions of rands in profits to research and development. Metals like titanium are finding favour with automotive and aviation companies in pursuit of savings in fuel consumption. This saving is achieved by reducing weight on aircraft and automobiles yet still meeting acceptable and improved structural integrity. In-depth research into the behaviour of various materials under varying loading conditions is therefore essential. The study on the processing of commercially pure grade 2 titanium alloy plates focuses on the development of process parameters for bending the material using a 4kW Nd: YAG laser to an approximate radius of curvature of 120mm. The resulting mechanical properties of laser formed plates are then compared to those obtained from mechanically formed samples. The titanium parent material was used to benchmark the performance of formed samples. The effect of process parameters on the mechanical properties and structural integrity also formed part of this study. To obtain the bending parameters for laser forming, various combinations of processing speeds and laser powers were used. The line energy is dependent on the power and scanning velocity parameters and these are shown in table 1. The laser power, line energy and scanning velocity were the main parameters controlled in this study and the beam diameter remained unchanged. Residual stress analysis, micro-hardness and fatigue life testing were carried out to analyse mechanical properties and the structural integrity of the plate samples. Microstructural analysis was also done to observe changes in the material as a result of the forming processes. From the results it is evident that laser forming is beneficial to the hardness of titanium but detrimental to the fatigue life at higher line energies. Residual stress analysis showed the amount of stress within the study samples increased with each forming operation. This information was vital in the analysis of the fatigue life of titanium. A fatigue life prediction model was developed from this study and it shed some light on the behaviour of titanium in fatigue testing. The model could be used to predict fatigue life when no fatigue data is available for commercially pure grade 2 titanium alloy plates. In conclusion, this study helped establish parameters that could be used to bend titanium while the analysis of mechanical properties showed the limits of working with this alloy.
- Full Text:
- Date Issued: 2014
Leadership and accountability of ward councillors in South African municipalities: a case study of Buffalo City Metropolitan Municipality
- Authors: Mfene, Primrose Nompendulo
- Date: 2014
- Subjects: Municipal government -- South Africa -- Eastern Cape , Local government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:8244 , http://hdl.handle.net/10948/d1010954 , Municipal government -- South Africa -- Eastern Cape , Local government -- South Africa -- Eastern Cape
- Description: The aim of the study is to critically examine the leadership and accountability of ward councillors in South African municipalities: A case of Buffalo City Municipality. The theory of communicative action by Jürgen Habermas was used to interpret the manner in which ward councillors are expected to interact with the members of the community when performing their leadership and accountability roles. The study adopted a case study design that assisted in establishing what is required from ward councillors with regard to their leadership and accountability roles in local governance. Qualitative and quantitative data collection instruments were used to collect data. The focus group interviews with ward committee members (n=100) from twenty-five (25) wards identified themes that relate to leadership and accountability constructs. The identified themes were verified in the quantitative phase in which questionnaires were administered to fifty (50) ward councillors. The qualitative data was analysed thematically using NVivo and quantitative data was analysed using MS Excel. Generally, the views of the ward councillors regarding their leadership and accountability were positive. However, their leadership and accountability were largely dependent on their individualised communication skills and emotional intelligence. Hence the study established that unless ward councillors are equipped with skills and knowledge in communication and emotional intelligence respectively, their leadership and accountability roles will not be able to contribute effectively to local governance. Subsequently, the study made a set of recommendations in this regard.
- Full Text:
- Date Issued: 2014
- Authors: Mfene, Primrose Nompendulo
- Date: 2014
- Subjects: Municipal government -- South Africa -- Eastern Cape , Local government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:8244 , http://hdl.handle.net/10948/d1010954 , Municipal government -- South Africa -- Eastern Cape , Local government -- South Africa -- Eastern Cape
- Description: The aim of the study is to critically examine the leadership and accountability of ward councillors in South African municipalities: A case of Buffalo City Municipality. The theory of communicative action by Jürgen Habermas was used to interpret the manner in which ward councillors are expected to interact with the members of the community when performing their leadership and accountability roles. The study adopted a case study design that assisted in establishing what is required from ward councillors with regard to their leadership and accountability roles in local governance. Qualitative and quantitative data collection instruments were used to collect data. The focus group interviews with ward committee members (n=100) from twenty-five (25) wards identified themes that relate to leadership and accountability constructs. The identified themes were verified in the quantitative phase in which questionnaires were administered to fifty (50) ward councillors. The qualitative data was analysed thematically using NVivo and quantitative data was analysed using MS Excel. Generally, the views of the ward councillors regarding their leadership and accountability were positive. However, their leadership and accountability were largely dependent on their individualised communication skills and emotional intelligence. Hence the study established that unless ward councillors are equipped with skills and knowledge in communication and emotional intelligence respectively, their leadership and accountability roles will not be able to contribute effectively to local governance. Subsequently, the study made a set of recommendations in this regard.
- Full Text:
- Date Issued: 2014
Leadership effectiveness in local government : the case of Amathole District Municipality
- Authors: Tshefu, Nolitha
- Date: 2014
- Subjects: Leadership -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8924 , http://hdl.handle.net/10948/d1021142
- Description: Local government is a complex sphere of government that was established on the principles of deepening democracy and advancing developmental local government. This is premised on the fact that local government is highly legislated; furthermore it is the sphere that is the closest to the people. Local government has endured a lot of criticism ranging from lack of leadership, inexperienced and unqualified managers, lack of service delivery and the poor quality of the services provided. The critical question being asked in this research study is whether the current calibre of leadership is achieving the principles of local government. Councillors, by virtue of their establishment, were meant to be the voice of communities. Councillors have a supervisory role to play in the council, but the skills, capacities and experience of councillors are often lacking. The media reports daily on problems and crises called “challenges” facing municipalities. Government has acknowledged that there are challenges in local government. This raises the issue of cadre deployment, whether it assists government in achieving its developmental objectives. Cadre deployment is a strategy of the ruling party which was meant to bring the previously disadvantaged groups to a position of power. This was meant to try to balance the imbalances of the past. This research study argues that the high volume of dissatisfaction by communities may be aggravated by the non-effectiveness of the political bearers in the municipal councils. This study identifies a number of contributing factors to the challenge at hand, such as the deployment of people to council structures; requirement in terms of academic qualification; and lack of leadership. Furthermore, this study investigates what could be the problem with the cadre deployment strategy of the ruling party; asking whether the problem is with the strategy itself or with its implementation. This research study therefore seeks to evaluate the impact the political leaders have on local government, focusing on service delivery. The study will first outline the state of local government in South Africa; compare the design of SA local government to international and African countries as well as looking at the key variables that result in the lack of service delivery. The issue of woman empowerment will also be discussed, evaluating the role that the country up to local government has played in ensuring that the 50/50 representation is achieved. The conclusion from this research is that a framework for the selection of council candidates should be developed. The framework will outline the basic skills and qualification requirements. The recommendations include improvements in the processes of interacting with communities; enforcing the code of conduct; developing ways that the municipality can educate communities on government operations; improved community participation and increased accountability. The impact of the lack of leadership in councillors undermines the democratic principles of developmental local government.
- Full Text:
- Date Issued: 2014
- Authors: Tshefu, Nolitha
- Date: 2014
- Subjects: Leadership -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8924 , http://hdl.handle.net/10948/d1021142
- Description: Local government is a complex sphere of government that was established on the principles of deepening democracy and advancing developmental local government. This is premised on the fact that local government is highly legislated; furthermore it is the sphere that is the closest to the people. Local government has endured a lot of criticism ranging from lack of leadership, inexperienced and unqualified managers, lack of service delivery and the poor quality of the services provided. The critical question being asked in this research study is whether the current calibre of leadership is achieving the principles of local government. Councillors, by virtue of their establishment, were meant to be the voice of communities. Councillors have a supervisory role to play in the council, but the skills, capacities and experience of councillors are often lacking. The media reports daily on problems and crises called “challenges” facing municipalities. Government has acknowledged that there are challenges in local government. This raises the issue of cadre deployment, whether it assists government in achieving its developmental objectives. Cadre deployment is a strategy of the ruling party which was meant to bring the previously disadvantaged groups to a position of power. This was meant to try to balance the imbalances of the past. This research study argues that the high volume of dissatisfaction by communities may be aggravated by the non-effectiveness of the political bearers in the municipal councils. This study identifies a number of contributing factors to the challenge at hand, such as the deployment of people to council structures; requirement in terms of academic qualification; and lack of leadership. Furthermore, this study investigates what could be the problem with the cadre deployment strategy of the ruling party; asking whether the problem is with the strategy itself or with its implementation. This research study therefore seeks to evaluate the impact the political leaders have on local government, focusing on service delivery. The study will first outline the state of local government in South Africa; compare the design of SA local government to international and African countries as well as looking at the key variables that result in the lack of service delivery. The issue of woman empowerment will also be discussed, evaluating the role that the country up to local government has played in ensuring that the 50/50 representation is achieved. The conclusion from this research is that a framework for the selection of council candidates should be developed. The framework will outline the basic skills and qualification requirements. The recommendations include improvements in the processes of interacting with communities; enforcing the code of conduct; developing ways that the municipality can educate communities on government operations; improved community participation and increased accountability. The impact of the lack of leadership in councillors undermines the democratic principles of developmental local government.
- Full Text:
- Date Issued: 2014
Learner perceptions on feedback received on performance tasks in mathematics in selected schools from the East London district in the Eastern Cape
- Authors: Ngudle, N G
- Date: 2014
- Subjects: Mathematics -- Study and teaching -- South Africa , Effective teaching , Teacher effectiveness
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16213 , http://hdl.handle.net/10353/d1016499 , Mathematics -- Study and teaching -- South Africa , Effective teaching , Teacher effectiveness
- Description: Feedback has an important role to play in the performance of learners. This study looks to identify the challenges that the learners are faced with when the teachers provide them with feedback and the ways they would like like it to be used in order to see feedback assisting them in their learning and improve their performance. Feedback contributes a lot to assessment and has a close link with performance. The study used the qualitative approach to identify the challenges the learners experience when they receive the feedback from their teachers. The participants were sampled from grade 12 learners in the form of a focus group (seven to ten per school) and individual respondents. The method used semi-structured interviews and portfolio observations to collect the data from two high schools in East London (EL) district to look at the nature of the feedback provided to learners. The data was later analysed and interpreted. It has been identified that for both schools feedback conveyed certain messages to learners such motivation to do better, a need to do better and, lastly, affirmation that the learners are on the right track or they are neglected and left to figure out how to do the tasks. The study discovered that, according to Hattie and Timperley (2007)’ there are four levels of feedback. It was found that for the task level learners from school A mainly received oral feedback which was often seen as denigrating them; however, in school B learners received both the oral and written feedback. They felt that the feedback assisted them to understand the task at hand. They also saw this as a way of building up their confidence in all the tasks they come across. Secondly, in the process level, learners in school A did not report receiving feedback at this level but only oral feedback which does not show their mistakes step by step in the task, yet in school B they reported that they got feedback from their teacher individually to help them understand the task. Thirdly, for the self regulation level, in school A there was no data to confirm this. Regarding school B, learners were being assisted by the feedback they received from their teacher and this caused them to monitor their progress. The fourth and last level is the self or personal evaluation where in school A learners were not able to evaluate themselves because they did not receive written feedback, whereas in school B learners could do that freely referring to the written comments from their teacher. The research therefore concluded that in one of the schools the four levels that the study was looking at were not all addressed and thus no meaningful feedback was given. For school B the teacher gave them the feedback which has contributed a lot in their learning. The study recommends that feedback should not be used for right or wrong answers but it must also state clearly why the learner has obtained such mark or grade and what to do to correct the wrongs. Teachers should consider that learner errors also assist them to have a broader picture on what more they need to do in their subjects. It is also recommended that teachers should consider various strategies in giving feedback and the learners’ work has to be monitored timeously for the purpose of the learning process. Lastly, a good approach when feedback is provided is also important because it builds high self-esteem and develops the teacher-learner approach accordingly.
- Full Text:
- Date Issued: 2014
- Authors: Ngudle, N G
- Date: 2014
- Subjects: Mathematics -- Study and teaching -- South Africa , Effective teaching , Teacher effectiveness
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16213 , http://hdl.handle.net/10353/d1016499 , Mathematics -- Study and teaching -- South Africa , Effective teaching , Teacher effectiveness
- Description: Feedback has an important role to play in the performance of learners. This study looks to identify the challenges that the learners are faced with when the teachers provide them with feedback and the ways they would like like it to be used in order to see feedback assisting them in their learning and improve their performance. Feedback contributes a lot to assessment and has a close link with performance. The study used the qualitative approach to identify the challenges the learners experience when they receive the feedback from their teachers. The participants were sampled from grade 12 learners in the form of a focus group (seven to ten per school) and individual respondents. The method used semi-structured interviews and portfolio observations to collect the data from two high schools in East London (EL) district to look at the nature of the feedback provided to learners. The data was later analysed and interpreted. It has been identified that for both schools feedback conveyed certain messages to learners such motivation to do better, a need to do better and, lastly, affirmation that the learners are on the right track or they are neglected and left to figure out how to do the tasks. The study discovered that, according to Hattie and Timperley (2007)’ there are four levels of feedback. It was found that for the task level learners from school A mainly received oral feedback which was often seen as denigrating them; however, in school B learners received both the oral and written feedback. They felt that the feedback assisted them to understand the task at hand. They also saw this as a way of building up their confidence in all the tasks they come across. Secondly, in the process level, learners in school A did not report receiving feedback at this level but only oral feedback which does not show their mistakes step by step in the task, yet in school B they reported that they got feedback from their teacher individually to help them understand the task. Thirdly, for the self regulation level, in school A there was no data to confirm this. Regarding school B, learners were being assisted by the feedback they received from their teacher and this caused them to monitor their progress. The fourth and last level is the self or personal evaluation where in school A learners were not able to evaluate themselves because they did not receive written feedback, whereas in school B learners could do that freely referring to the written comments from their teacher. The research therefore concluded that in one of the schools the four levels that the study was looking at were not all addressed and thus no meaningful feedback was given. For school B the teacher gave them the feedback which has contributed a lot in their learning. The study recommends that feedback should not be used for right or wrong answers but it must also state clearly why the learner has obtained such mark or grade and what to do to correct the wrongs. Teachers should consider that learner errors also assist them to have a broader picture on what more they need to do in their subjects. It is also recommended that teachers should consider various strategies in giving feedback and the learners’ work has to be monitored timeously for the purpose of the learning process. Lastly, a good approach when feedback is provided is also important because it builds high self-esteem and develops the teacher-learner approach accordingly.
- Full Text:
- Date Issued: 2014
Learning across projects in the African Development Bank
- Authors: Mukuvari, Itai
- Date: 2014
- Subjects: Development banks , Economic development projects -- Africa , Banks and banking
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9226 , http://hdl.handle.net/10948/d1020974
- Description: In this study, the focus will be on the possibility of a lack of learning during execution of projects, which could lead to poor performance in development effectiveness. This study will particularly look at the lessons learnt by individual road infrastructure projects and examine whether or not the learning points were embraced into other projects. The African Development Bank (AfDB) is an example of a multilateral donor agency that predominantly operates in Africa where there are some challenges with aid effectiveness as described earlier. The study is not an attempt to represent the use of lessons learnt and knowledge management in multilateral agencies in general; it is rather a start from which other researchers can build on in order to answer the question: What can donor agencies do to improve aid effectiveness in their project execution? The major contribution of this study is to encourage donor agencies to look at whether their organisations are learning from their different projects as they seek better development effectiveness.
- Full Text:
- Date Issued: 2014
- Authors: Mukuvari, Itai
- Date: 2014
- Subjects: Development banks , Economic development projects -- Africa , Banks and banking
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9226 , http://hdl.handle.net/10948/d1020974
- Description: In this study, the focus will be on the possibility of a lack of learning during execution of projects, which could lead to poor performance in development effectiveness. This study will particularly look at the lessons learnt by individual road infrastructure projects and examine whether or not the learning points were embraced into other projects. The African Development Bank (AfDB) is an example of a multilateral donor agency that predominantly operates in Africa where there are some challenges with aid effectiveness as described earlier. The study is not an attempt to represent the use of lessons learnt and knowledge management in multilateral agencies in general; it is rather a start from which other researchers can build on in order to answer the question: What can donor agencies do to improve aid effectiveness in their project execution? The major contribution of this study is to encourage donor agencies to look at whether their organisations are learning from their different projects as they seek better development effectiveness.
- Full Text:
- Date Issued: 2014
Learning pathways for improving rehabilitation practices in the mining industry : two cases of coal mining and borrow pits
- Authors: Mphinyane, Andani
- Date: 2014
- Subjects: Coal mines and mining -- Environmental aspects -- South Africa , Environmental education -- South Africa , Sustainable development -- South Africa , Coal miners -- Education (Continuing education) -- South Africa , Borrow pits -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1989 , http://hdl.handle.net/10962/d1013271
- Description: This research investigates cases of learning pathways for improving rehabilitation practices for key occupations in the mining industry. The study is set up as a partnership research programme between Rhodes University Environmental Learning Research Centre in South Africa, and the South African Qualification Authority, focussing on workplace learning and sustainability practices. This research programme seeks to understand the implications of the move to a knowledge society, with its emphasis on knowledge building over time, particularly in and for the environmental sector. The research was conducted as a qualitative case study that made use of semi-structured interviews, document analysis, visual photographs and observations as instruments of data gathering. Participants were sampled from two case studies, one in Limpopo province and the other one in Mpumalanga Province, who are directly involved in rehabilitation practices and related education and training programmes. The study makes use of career stories from the key occupations to provide insight into workplace learning pathways to inform education and training in the mining industry. A series of analytical statements captures some of the main findings on early education histories, career choices, learning pathway decisions and experiences related to sustainable practices and some complexities related to learning pathways. Environment and sustainability education is a cross-cutting issue in the NQF; and it pertains to the mining sector, especially to rehabilitation practices, which form the focus of this study as little is known about learning pathways associated with these sustainability practices. Insights from the study should enable the sector to enhance rehabilitation training for key occupations and at the same time encourage lifelong learning contributing towards sustainable development.
- Full Text:
- Date Issued: 2014
- Authors: Mphinyane, Andani
- Date: 2014
- Subjects: Coal mines and mining -- Environmental aspects -- South Africa , Environmental education -- South Africa , Sustainable development -- South Africa , Coal miners -- Education (Continuing education) -- South Africa , Borrow pits -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1989 , http://hdl.handle.net/10962/d1013271
- Description: This research investigates cases of learning pathways for improving rehabilitation practices for key occupations in the mining industry. The study is set up as a partnership research programme between Rhodes University Environmental Learning Research Centre in South Africa, and the South African Qualification Authority, focussing on workplace learning and sustainability practices. This research programme seeks to understand the implications of the move to a knowledge society, with its emphasis on knowledge building over time, particularly in and for the environmental sector. The research was conducted as a qualitative case study that made use of semi-structured interviews, document analysis, visual photographs and observations as instruments of data gathering. Participants were sampled from two case studies, one in Limpopo province and the other one in Mpumalanga Province, who are directly involved in rehabilitation practices and related education and training programmes. The study makes use of career stories from the key occupations to provide insight into workplace learning pathways to inform education and training in the mining industry. A series of analytical statements captures some of the main findings on early education histories, career choices, learning pathway decisions and experiences related to sustainable practices and some complexities related to learning pathways. Environment and sustainability education is a cross-cutting issue in the NQF; and it pertains to the mining sector, especially to rehabilitation practices, which form the focus of this study as little is known about learning pathways associated with these sustainability practices. Insights from the study should enable the sector to enhance rehabilitation training for key occupations and at the same time encourage lifelong learning contributing towards sustainable development.
- Full Text:
- Date Issued: 2014
Learning pathways of key occupations relevant to sustainable development in Makana Municipality
- Authors: Mohanoe, Elma Nthabiseng
- Date: 2014
- Subjects: Makana Municipality , Sustainable development -- South Africa -- Grahamstown , Municipal government -- South Africa -- Grahamstown , Environmental education -- South Africa -- Grahamstown , Sustainable development -- Study and teaching -- South Africa -- Grahamstown , Vocational qualifications -- South Africa -- Grahamstown , Organizational learning -- South Africa -- Grahamstown , Educational equalization -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1990 , http://hdl.handle.net/10962/d1013322
- Description: This study presents results to be contributed to the field of Environmental Education. It is a new arena for qualifications development and implementation in the South African Education and Training system. The study is located in the context of a joint research programme focusing on understanding issues of articulation and learning pathways development for sustainable development, established between the South African Qualifications Authority (SAQA) in partnership with Rhodes University, Environmental Learning Research Centre (ELRC). Phase 1 of the SAQA/ELRC research showed that researching workplace learning requires an understanding of learning pathways, if it is to be meaningful. It is for this reason that this research in phase 2 focuses specifically on learning pathways in the context of a local municipality in Makana. Using a case study research approach and qualitative data, this study investigated learning pathways for three occupational categories at different levels in the Makana Municipality: 1) key managerial occupations; 2) key supervisory occupations; and 3) key workers occupations relevant to sustainable development and how they are shaped and experienced. It also identified system and structural factors influencing articulation and access issues relevant to progress in learning pathways relevant to these key occupations. The study was designed using a case study research. Primarily, qualitative research techniques were employed to generate data, including observations, interviews and document analysis. The study used inductive, abductive and retroductive modes of inference to interpret and analyse data, using critical realist and systems perspectives. The findings on worker learning pathways show that there is a discrepancy between the Training Policy and the Environmental Training and Education Strategy of Makana Municipality. The issue of complexity in learning pathways and social structural factors such as inequality emerged as factors that strongly influenced learning pathways for workers. Learning pathways for workers involved in sustainable development practices hardly existed or simply did not exist. Interesting transitions associated with learning pathways such as from home, to work or no schooling in the case of the workers, showed a pattern of emergence. These showed that learning pathways are not accessible and equally available to everyone as can often erroneously be assumed. The findings on supervisor learning pathways show diverse complexities as well as related issues, when compared to the worker’s learning pathways. Issues such as overlapping of study and work emerge as influential to supervisor learning pathways. Lack of support is, however, an influencing factor, but in a different context compared to the workers, and mainly focuses on lack of bursaries, highlighting training policy issues. This aspect was found to also relate to lack of proper resources in order to enable them to learn and do their job better; an issue raised by the workers too. This challenge of lack of support in various forms posed a barrier to learning pathways. Findings related to the manager’s learning pathways show a noticeable gap between the workers, supervisors and managers. The manager’s generally have higher education qualifications related to sustainable development, and in certain cases managers have had exposure to international training related to sustainable development. Factors such as ample opportunities for learning, mentoring, association on professional bodies, and decision making powers influenced the manager’s learning pathways. It was also notable that while managers receive occupationally directed training, it is not necessarily sustainable development related. In theory, the results highlighted a need to understand systems as a whole and how their integration is important in influencing learning pathways. There were also underlying mechanisms and structures identified which needed to be unravelled and understood as these were found to influence learning pathways in this study. The study highlighted critical insights in understanding how learning pathways in a local municipality context (the case of Makana Municipality) are constructed by both systems and structural factors in the workplace, while also identifying ways in which agency of those engaged in learning for sustainable development in workplaces is enabled and /or constrained by such factors. It also showed the persistence of deep-seated inequalities of opportunity, especially for workers, to access and participate in sustainable development learning pathways.
- Full Text:
- Date Issued: 2014
- Authors: Mohanoe, Elma Nthabiseng
- Date: 2014
- Subjects: Makana Municipality , Sustainable development -- South Africa -- Grahamstown , Municipal government -- South Africa -- Grahamstown , Environmental education -- South Africa -- Grahamstown , Sustainable development -- Study and teaching -- South Africa -- Grahamstown , Vocational qualifications -- South Africa -- Grahamstown , Organizational learning -- South Africa -- Grahamstown , Educational equalization -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1990 , http://hdl.handle.net/10962/d1013322
- Description: This study presents results to be contributed to the field of Environmental Education. It is a new arena for qualifications development and implementation in the South African Education and Training system. The study is located in the context of a joint research programme focusing on understanding issues of articulation and learning pathways development for sustainable development, established between the South African Qualifications Authority (SAQA) in partnership with Rhodes University, Environmental Learning Research Centre (ELRC). Phase 1 of the SAQA/ELRC research showed that researching workplace learning requires an understanding of learning pathways, if it is to be meaningful. It is for this reason that this research in phase 2 focuses specifically on learning pathways in the context of a local municipality in Makana. Using a case study research approach and qualitative data, this study investigated learning pathways for three occupational categories at different levels in the Makana Municipality: 1) key managerial occupations; 2) key supervisory occupations; and 3) key workers occupations relevant to sustainable development and how they are shaped and experienced. It also identified system and structural factors influencing articulation and access issues relevant to progress in learning pathways relevant to these key occupations. The study was designed using a case study research. Primarily, qualitative research techniques were employed to generate data, including observations, interviews and document analysis. The study used inductive, abductive and retroductive modes of inference to interpret and analyse data, using critical realist and systems perspectives. The findings on worker learning pathways show that there is a discrepancy between the Training Policy and the Environmental Training and Education Strategy of Makana Municipality. The issue of complexity in learning pathways and social structural factors such as inequality emerged as factors that strongly influenced learning pathways for workers. Learning pathways for workers involved in sustainable development practices hardly existed or simply did not exist. Interesting transitions associated with learning pathways such as from home, to work or no schooling in the case of the workers, showed a pattern of emergence. These showed that learning pathways are not accessible and equally available to everyone as can often erroneously be assumed. The findings on supervisor learning pathways show diverse complexities as well as related issues, when compared to the worker’s learning pathways. Issues such as overlapping of study and work emerge as influential to supervisor learning pathways. Lack of support is, however, an influencing factor, but in a different context compared to the workers, and mainly focuses on lack of bursaries, highlighting training policy issues. This aspect was found to also relate to lack of proper resources in order to enable them to learn and do their job better; an issue raised by the workers too. This challenge of lack of support in various forms posed a barrier to learning pathways. Findings related to the manager’s learning pathways show a noticeable gap between the workers, supervisors and managers. The manager’s generally have higher education qualifications related to sustainable development, and in certain cases managers have had exposure to international training related to sustainable development. Factors such as ample opportunities for learning, mentoring, association on professional bodies, and decision making powers influenced the manager’s learning pathways. It was also notable that while managers receive occupationally directed training, it is not necessarily sustainable development related. In theory, the results highlighted a need to understand systems as a whole and how their integration is important in influencing learning pathways. There were also underlying mechanisms and structures identified which needed to be unravelled and understood as these were found to influence learning pathways in this study. The study highlighted critical insights in understanding how learning pathways in a local municipality context (the case of Makana Municipality) are constructed by both systems and structural factors in the workplace, while also identifying ways in which agency of those engaged in learning for sustainable development in workplaces is enabled and /or constrained by such factors. It also showed the persistence of deep-seated inequalities of opportunity, especially for workers, to access and participate in sustainable development learning pathways.
- Full Text:
- Date Issued: 2014
Legislating business rescue in South Africa: a critical evaluation
- Authors: Darko-Mamphey, Dorothy
- Date: 2014
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11121 , http://hdl.handle.net/10353/d1015244
- Description: Social, political and economic changes in post-apartheid South Africa have generated the need for a major reform of the legislative regime governing companies in order to ensure that that regime is capable of addressing the challenges faced in domestic and international circles, and to also meet the demands of globalisation. 1 These developments include the change in culture from company liquidations to commercial renewal which caused the Department of Trade and Industry (DTI) to embark on drastic reforms of South Africa’s business rescue mechanism as part of the broader company law reform project. 2 The domestic and global environments have indeed changed drastically with corporate structures showing significant evolution.
- Full Text:
- Date Issued: 2014
- Authors: Darko-Mamphey, Dorothy
- Date: 2014
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11121 , http://hdl.handle.net/10353/d1015244
- Description: Social, political and economic changes in post-apartheid South Africa have generated the need for a major reform of the legislative regime governing companies in order to ensure that that regime is capable of addressing the challenges faced in domestic and international circles, and to also meet the demands of globalisation. 1 These developments include the change in culture from company liquidations to commercial renewal which caused the Department of Trade and Industry (DTI) to embark on drastic reforms of South Africa’s business rescue mechanism as part of the broader company law reform project. 2 The domestic and global environments have indeed changed drastically with corporate structures showing significant evolution.
- Full Text:
- Date Issued: 2014
Lesson for spatial planning: post-1994 human settlement development in Nelson Mandela Bay Municipality
- Authors: Nagar, Manesh
- Date: 2014
- Subjects: Land settlement -- South Africa -- Port Elizabeth -- 21st century Human geography -- South Africa -- Port Elizabeth -- 21st century , City planning -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/47992 , vital:40461
- Description: Spatial planning of human settlements in South African cities, particularly during the apartheid era, has been extensively investigated. Urban development in Nelson Mandela Bay (formerly known as Port Elizabeth) resembled most other South African cities and towns based on the informants of the apartheid spatial planning policies since 1948. Consequent to the colonial style urban forms, the typical South African city and town (including Nelson Mandela Bay) faces numerous challenges to eradicate the effects of the apartheid legacies of functional and structural inefficiencies during the post-apartheid period. The research aims at examining the effectiveness of the post-apartheid residential policies with emphasis on the ‘Breaking New Ground’ policy in meeting the government’s expectations of restructuring and transformation of spatial urban planning after 1994, between 2004 and 2011 in Walmer Township. More specifically, the objectives of the study were to determine the extent of eradication of informal settlements in the study area; functional integration to investigate the extent of transformation of the study area in terms of functional integration; and to analyse the financially sustainability of the area, focused on the road network. The study was theoretically and conceptually influenced by colonial and postcolonial policies that impacted on urban development and spatial planning in the former colonial city. Methodologically, both quantitative and qualitative approaches were adopted in this investigation and in a case study. The data used for the study was obtained from both primary and secondary sources. Primary data were collected by using a remote sensing technique and via face-to-face interviews, where the interviewees were selected at random from within the identified suburb areas. Secondary data were obtained from scholarly articles and books, and government agencies and departments. The Chi-square test of dependence was used and this was to determine whether there was a relationship between variables. The results indicate that there are over 3,000 informal settlement dwellings in 2011, and very little eradication of informal settlement has been achieved. Although there are signs of heightened efforts of functional integration, it still remains limited. It was revealed that the local government has missed opportunities to promote the BNG policy objectives, particularly in the application of higher density developments and to promote cost-effective road networks. Based on the outcomes of the study, there are clear signs of the post-apartheid governments’ slow pace to transform human settlements. The post-apartheid housing policies, in particular the BNG policy, have not effectively transformed human settlements as envisaged.
- Full Text:
- Date Issued: 2014
- Authors: Nagar, Manesh
- Date: 2014
- Subjects: Land settlement -- South Africa -- Port Elizabeth -- 21st century Human geography -- South Africa -- Port Elizabeth -- 21st century , City planning -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/47992 , vital:40461
- Description: Spatial planning of human settlements in South African cities, particularly during the apartheid era, has been extensively investigated. Urban development in Nelson Mandela Bay (formerly known as Port Elizabeth) resembled most other South African cities and towns based on the informants of the apartheid spatial planning policies since 1948. Consequent to the colonial style urban forms, the typical South African city and town (including Nelson Mandela Bay) faces numerous challenges to eradicate the effects of the apartheid legacies of functional and structural inefficiencies during the post-apartheid period. The research aims at examining the effectiveness of the post-apartheid residential policies with emphasis on the ‘Breaking New Ground’ policy in meeting the government’s expectations of restructuring and transformation of spatial urban planning after 1994, between 2004 and 2011 in Walmer Township. More specifically, the objectives of the study were to determine the extent of eradication of informal settlements in the study area; functional integration to investigate the extent of transformation of the study area in terms of functional integration; and to analyse the financially sustainability of the area, focused on the road network. The study was theoretically and conceptually influenced by colonial and postcolonial policies that impacted on urban development and spatial planning in the former colonial city. Methodologically, both quantitative and qualitative approaches were adopted in this investigation and in a case study. The data used for the study was obtained from both primary and secondary sources. Primary data were collected by using a remote sensing technique and via face-to-face interviews, where the interviewees were selected at random from within the identified suburb areas. Secondary data were obtained from scholarly articles and books, and government agencies and departments. The Chi-square test of dependence was used and this was to determine whether there was a relationship between variables. The results indicate that there are over 3,000 informal settlement dwellings in 2011, and very little eradication of informal settlement has been achieved. Although there are signs of heightened efforts of functional integration, it still remains limited. It was revealed that the local government has missed opportunities to promote the BNG policy objectives, particularly in the application of higher density developments and to promote cost-effective road networks. Based on the outcomes of the study, there are clear signs of the post-apartheid governments’ slow pace to transform human settlements. The post-apartheid housing policies, in particular the BNG policy, have not effectively transformed human settlements as envisaged.
- Full Text:
- Date Issued: 2014
Lessons learnt from teachers during the first two years of the implemetation of a new foundation phase science curriculum
- Authors: Plaatjies, Randall
- Date: 2014
- Subjects: Early childhood teachers -- South Africa , Science -- Study and teaching -- South Africa , Education, Elementary -- Curricula -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/3052 , vital:20391
- Description: Foundation Phase (FP) teachers’ reluctance to teach science might stem from their weak science backgrounds that has resulted in their limited science content knowledge and their congruent science misconceptions and low self-efficacy with respect to science (Boyer, 2010; Luera, Moyer, & Everett, 2005). This study was guided by the following research question: What lessons, if any, can be learnt from a representative sample of FP teachers from six rural schools in the Libode Mega District with respect to the implementation of the Natural Sciences aspect of a new curriculum? The sample comprised 18 black, female, isiXhosa speaking teachers that represented six schools in the Libode Mega District (Libode, Ntlaza and Lusikisiki). A mixed-methods approach was used to collect qualitative and descriptive quantitative data using two structured questionnaires and semi-structured interviews in the form of focus groups.
- Full Text:
- Date Issued: 2014
- Authors: Plaatjies, Randall
- Date: 2014
- Subjects: Early childhood teachers -- South Africa , Science -- Study and teaching -- South Africa , Education, Elementary -- Curricula -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/3052 , vital:20391
- Description: Foundation Phase (FP) teachers’ reluctance to teach science might stem from their weak science backgrounds that has resulted in their limited science content knowledge and their congruent science misconceptions and low self-efficacy with respect to science (Boyer, 2010; Luera, Moyer, & Everett, 2005). This study was guided by the following research question: What lessons, if any, can be learnt from a representative sample of FP teachers from six rural schools in the Libode Mega District with respect to the implementation of the Natural Sciences aspect of a new curriculum? The sample comprised 18 black, female, isiXhosa speaking teachers that represented six schools in the Libode Mega District (Libode, Ntlaza and Lusikisiki). A mixed-methods approach was used to collect qualitative and descriptive quantitative data using two structured questionnaires and semi-structured interviews in the form of focus groups.
- Full Text:
- Date Issued: 2014
Levels of job satisfaction experienced by employees at crime intelligence, protection and security services in King William's Town
- Authors: Sotana, Lizo
- Date: 2014
- Subjects: Job satisfaction -- South Africa -- Eastern Cape , Employee motivation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:8492 , http://hdl.handle.net/10948/d1021031
- Description: This study evaluated the levels of job satisfaction experienced by warrant officers and constables at crime intelligence, protection and security services in King William’s Town. Job satisfaction is a personal appraisal of the job and the psychological experience at work. It is a measure of the general attitudes to work of a specific individual rather than of a collection of attitudes of an employee to a number of aspects related to his / her job. These include the work itself, workplace interactions and relationships, rewards and incentive schemes, and personal characteristics. The main purpose of this research paper was to identify certain factors impacting on job satisfaction. The literature study was completed on the factors that influence job satisfaction. The factors were work itself, promotion, pay, work group and working conditions. The literature study revealed which methods were used in selecting factors impacting on job satisfaction. The employees at Crime intelligence, protection and security services (CIPS), specifically the warrant officers and constables were asked questions in an empirical study and were asked to complete questionnaires. After the previous steps were completed, the findings of the study and the empirical study were made. The recommendations were also made to improve levels of job satisfaction experienced by warrant officers and constables at Constables at CIPS. The recommendations made were to assist the management assist the management as to what needs to be done to motivate members to achieve their objectives.
- Full Text:
- Date Issued: 2014
- Authors: Sotana, Lizo
- Date: 2014
- Subjects: Job satisfaction -- South Africa -- Eastern Cape , Employee motivation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:8492 , http://hdl.handle.net/10948/d1021031
- Description: This study evaluated the levels of job satisfaction experienced by warrant officers and constables at crime intelligence, protection and security services in King William’s Town. Job satisfaction is a personal appraisal of the job and the psychological experience at work. It is a measure of the general attitudes to work of a specific individual rather than of a collection of attitudes of an employee to a number of aspects related to his / her job. These include the work itself, workplace interactions and relationships, rewards and incentive schemes, and personal characteristics. The main purpose of this research paper was to identify certain factors impacting on job satisfaction. The literature study was completed on the factors that influence job satisfaction. The factors were work itself, promotion, pay, work group and working conditions. The literature study revealed which methods were used in selecting factors impacting on job satisfaction. The employees at Crime intelligence, protection and security services (CIPS), specifically the warrant officers and constables were asked questions in an empirical study and were asked to complete questionnaires. After the previous steps were completed, the findings of the study and the empirical study were made. The recommendations were also made to improve levels of job satisfaction experienced by warrant officers and constables at Constables at CIPS. The recommendations made were to assist the management assist the management as to what needs to be done to motivate members to achieve their objectives.
- Full Text:
- Date Issued: 2014
Lignocellulosic waste degradation using enzyme synergy with commercially available enzymes and Clostridium cellulovorans XylanaseA and MannanaseA
- Authors: Morrison, David Graham
- Date: 2014
- Subjects: Lignocellulose -- Biodegradation , Enzymes -- Biotechnology , Agricultural wastes as fuel , Polysaccharides -- Biotechnology , Sugar -- Inversion , Clostridium , Xylanases , Monomers
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4119 , http://hdl.handle.net/10962/d1013292
- Description: The launch of national and international initiatives to reduce pollution, reliance on fossil fuels and increase the beneficiation of agricultural wastes has prompted research into sugar monomer production from lignocellulosic wastes. These sugars can subsequently be used in the production of biofuels and environmentally degradable plastics. This study investigated the use of synergistic combinations of commercial and pure enzymes to lower enzyme costs and loadings, while increasing enzyme activity in the hydrolysis of agricultural waste. Pineapple pomace was selected due to its current underutilisation and the substantial quantities of it produced annually, as a by-product of pineapple canning. One of the primary costs in beneficiating agricultural wastes, such as pineapple pomace, is the high cost of enzyme solutions used to generate reducing sugars. This can be lowered through the use of synergistic combinations of enzymes. Studies related to the inclusion of hemicellulose degrading enzymes with commercial enzyme solutions have been limited and investigation of these solutions in select combinations, together with pineapple pomace substrate, allows for novel research. The use of synergistic combinations of purified cellulosomal enzymes has previously been shown to be effective at releasing reducing sugars from agricultural wastes. For the present study, MannanaseA and XylanaseA from Clostridium cellulovorans were heterologously expressed in Escherichia coli BL21 (DE3) cells and purified with immobilised metal affinity chromatography. These enzymes, in addition to two commercially available enzyme solutions (Celluclast 1.5L® and Pectinex® 3XL), were assayed on defined polysaccharides that are present in pineapple pomace to determine their substrate specificities. The degree(s) of synergy and specific activities of selected combinations of these enzymes were tested under both simultaneous and sequential conditions. It was observed that several synergistic combinations of enzyme solutions in select ratios, such as C20P60X20 (20% cellulose, 60% pectinase and 20% xylanse), C20P40X40 (20% cellulose, 40% pectinase and 40% xylanase) and C20P80 (20% cellulose, 80% pectinase) with pineapple pomace could both decrease the protein loading, while raising the level of activity compared to individual enzyme solutions. The highest quantity of reducing sugars to protein weight used on pineapple pomace was recorded at 3, 9 and 18 hours with combinations of Pectinex® 3XL and Celluclast 1.5L®, but for 27 h it was combinations of both these commercial solutions with XynA. The contribution of XynA was significant as C20P60X20 displayed the second highest reducing sugar production of 1.521 mg/mL, at 36 h from 12.875 μg/mL of protein, which was the second lowest protein loading. It was also shown that certain enzyme combinations, such as Pectinex® 3XL, Celluclast 1.5L® and XynA, did not generate synergy when combined in solution at the initial stages of hydrolysis, and instead generated a form of competition called anti-synergy. This was due to Pectinex® 3XL which had anti-synergy relationships in select combinations with the other enzyme solutions assayed. It was also observed that the degree of synergy and specific activity for a combination changed over time. Some solutions displayed the highest levels of synergy at the commencement of hydrolysis, namely Celluclast 1.5L®, ManA and XynA. Other combinations exhibited the highest levels of synergy at the end of the assay period, such as Pectinex® 3XL and Celluclast 1.5L®. Whether greater synergy was generated at the start or end of hydrolysis was a function of the stability of the enzymes in solution and whether enzyme activity increased substrate accessibility or generated competition between enzymes in solution. Sequential synergy studies demonstrated an anti-synergy relationship between Pectinex® 3XL and XynA or ManA, as well as Pectinex® 3 XL and Celluclast 1.5L®. It was found that under sequential synergy conditions with Pectinex® 3 XL, XynA and ManA, that anti-synergy could be negated and high degrees of synergy attained when the enzymes were added in specific loading orders and not inhibited by the presence of other active enzymes. The importance of loading order was demonstrated under sequential synergy conditions when XynA was added before ManA followed by Pectinex® 3 XL, which increased the activity and synergy of the solution by 50%. This equates to a 60% increase in reducing sugar release from the same concentrations of enzymes and emphasises the importance of removing anti-synergy relationships from combinations of enzymes. It can be concluded that a C20P60X20 combination (based on activity) can both synergistically increase the reducing sugar production and lower the protein loading required for pineapple pomace hydrolysis. This study also highlights the importance of reducing anti-synergy in customised enzyme cocktails and how sequential synergy can demonstrate the order in which a lignocellulosic waste is degraded.
- Full Text:
- Date Issued: 2014
- Authors: Morrison, David Graham
- Date: 2014
- Subjects: Lignocellulose -- Biodegradation , Enzymes -- Biotechnology , Agricultural wastes as fuel , Polysaccharides -- Biotechnology , Sugar -- Inversion , Clostridium , Xylanases , Monomers
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4119 , http://hdl.handle.net/10962/d1013292
- Description: The launch of national and international initiatives to reduce pollution, reliance on fossil fuels and increase the beneficiation of agricultural wastes has prompted research into sugar monomer production from lignocellulosic wastes. These sugars can subsequently be used in the production of biofuels and environmentally degradable plastics. This study investigated the use of synergistic combinations of commercial and pure enzymes to lower enzyme costs and loadings, while increasing enzyme activity in the hydrolysis of agricultural waste. Pineapple pomace was selected due to its current underutilisation and the substantial quantities of it produced annually, as a by-product of pineapple canning. One of the primary costs in beneficiating agricultural wastes, such as pineapple pomace, is the high cost of enzyme solutions used to generate reducing sugars. This can be lowered through the use of synergistic combinations of enzymes. Studies related to the inclusion of hemicellulose degrading enzymes with commercial enzyme solutions have been limited and investigation of these solutions in select combinations, together with pineapple pomace substrate, allows for novel research. The use of synergistic combinations of purified cellulosomal enzymes has previously been shown to be effective at releasing reducing sugars from agricultural wastes. For the present study, MannanaseA and XylanaseA from Clostridium cellulovorans were heterologously expressed in Escherichia coli BL21 (DE3) cells and purified with immobilised metal affinity chromatography. These enzymes, in addition to two commercially available enzyme solutions (Celluclast 1.5L® and Pectinex® 3XL), were assayed on defined polysaccharides that are present in pineapple pomace to determine their substrate specificities. The degree(s) of synergy and specific activities of selected combinations of these enzymes were tested under both simultaneous and sequential conditions. It was observed that several synergistic combinations of enzyme solutions in select ratios, such as C20P60X20 (20% cellulose, 60% pectinase and 20% xylanse), C20P40X40 (20% cellulose, 40% pectinase and 40% xylanase) and C20P80 (20% cellulose, 80% pectinase) with pineapple pomace could both decrease the protein loading, while raising the level of activity compared to individual enzyme solutions. The highest quantity of reducing sugars to protein weight used on pineapple pomace was recorded at 3, 9 and 18 hours with combinations of Pectinex® 3XL and Celluclast 1.5L®, but for 27 h it was combinations of both these commercial solutions with XynA. The contribution of XynA was significant as C20P60X20 displayed the second highest reducing sugar production of 1.521 mg/mL, at 36 h from 12.875 μg/mL of protein, which was the second lowest protein loading. It was also shown that certain enzyme combinations, such as Pectinex® 3XL, Celluclast 1.5L® and XynA, did not generate synergy when combined in solution at the initial stages of hydrolysis, and instead generated a form of competition called anti-synergy. This was due to Pectinex® 3XL which had anti-synergy relationships in select combinations with the other enzyme solutions assayed. It was also observed that the degree of synergy and specific activity for a combination changed over time. Some solutions displayed the highest levels of synergy at the commencement of hydrolysis, namely Celluclast 1.5L®, ManA and XynA. Other combinations exhibited the highest levels of synergy at the end of the assay period, such as Pectinex® 3XL and Celluclast 1.5L®. Whether greater synergy was generated at the start or end of hydrolysis was a function of the stability of the enzymes in solution and whether enzyme activity increased substrate accessibility or generated competition between enzymes in solution. Sequential synergy studies demonstrated an anti-synergy relationship between Pectinex® 3XL and XynA or ManA, as well as Pectinex® 3 XL and Celluclast 1.5L®. It was found that under sequential synergy conditions with Pectinex® 3 XL, XynA and ManA, that anti-synergy could be negated and high degrees of synergy attained when the enzymes were added in specific loading orders and not inhibited by the presence of other active enzymes. The importance of loading order was demonstrated under sequential synergy conditions when XynA was added before ManA followed by Pectinex® 3 XL, which increased the activity and synergy of the solution by 50%. This equates to a 60% increase in reducing sugar release from the same concentrations of enzymes and emphasises the importance of removing anti-synergy relationships from combinations of enzymes. It can be concluded that a C20P60X20 combination (based on activity) can both synergistically increase the reducing sugar production and lower the protein loading required for pineapple pomace hydrolysis. This study also highlights the importance of reducing anti-synergy in customised enzyme cocktails and how sequential synergy can demonstrate the order in which a lignocellulosic waste is degraded.
- Full Text:
- Date Issued: 2014
Linking satellite and point micrometeorological data to estimate : distributed evapotranspiration modelling based on MODIS LAI, Penman-Monteith and functional convergence theory
- Authors: Weideman, Craig Ivan
- Date: 2014
- Subjects: Plants -- Water requirements -- South Africa , Evaporation (Meteorology) -- Measurement , Satellite meteorology , Micrometeorology , Evapotranspiration , MODIS (Spectroradiometer)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4779 , http://hdl.handle.net/10962/d1012078 , Plants -- Water requirements -- South Africa , Evaporation (Meteorology) -- Measurement , Satellite meteorology , Micrometeorology , Evapotranspiration , MODIS (Spectroradiometer)
- Description: Recent advances in satellite sensor technology and micrometeorological instrumentation for water flux measurement, coupled with the expansion of automatic weather station networks that provide routine measurements of near-surface climate variables, present new opportunities for combining satellite and ground-based instrumentation to obtain distributed estimates of vegetation water use over wide areas in South Africa. In this study, a novel approach is tested, which uses satellite leaf area index (LAI) data retrieved by the Moderate Resolution Imaging Spectroradiometer (MODIS) to inform the FAO-56 Penman-Monteith equation for calculating reference evaporation (ET₀) of vegetation phenological activity. The model (ETMODIS) was validated at four sites in three different ecosystems across the country, including semi-arid savanna near Skukuza, mixed community grassland at Bellevue, near Pietermaritzburg, and Groenkop, a mixed evergreen indigenous forest near George, to determine potential for application over wider areas of the South African land surface towards meeting water resource management objectives. At Skukuza, evaluated against 170 days of flux data measured at a permanent eddy covariance (EC) flux tower in 2007, the model (ETMODIS) predicted 194.8 mm evapotranspiration relative to 148.9 mm measured fluxes, an overestimate of 31.7 %, (r² = 0.67). At an adjacent site, evaluated against flux data measured on two discrete periods of seven and eight days in February and May of 2005 using a large aperture scintillometer (SLS), ETMODIS predicted 27.4 mm and 6.7 mm evapotranspiration respectively, relative to measured fluxes of 32.5 and 8.2 mm, underestimates of 15.7 % and 18.3 % in each case (r² = 0.67 and 0.34, respectively). At Bellevue, evaluated against 235 days of evapotranspiration data measured using a surface layer scintillometer (SLS) in 2003, ETMODIS predicted 266.9 mm evapotranspiration relative to 460.2 mm measured fluxes, an underestimate of 42 % (r² = 0.67). At Groenkop, evaluated against data measured using a SLS over three discrete periods of four, seven and seven days in February, June and September/October respectively, ETMODIS predicted 9.7 mm, 10.3 mm and 17.0 mm evapotranspiration, relative to measured fluxes of 10.9 mm, 14.6 mm and 23. 9 mm, underestimates of 22.4 %, 11.2 % and 24.1 % in each case (r² = 0.98, 0.43 and 0.80, respectively). Total measured evapotranspiration exceeded total modelled evapotranspiration in all cases, with the exception of the flux tower site at Skukuza, where evapotranspiration was overestimated by ETMODIS by 31.7 % relative to measured (EC) values for the 170 days in 2007 where corresponding modelled and measured data were available. The most significant differences in measured versus predicted data were recorded at the Skukuza flux tower site in 2007 (31.7 % overestimate), and the Bellevue SLS flux site in 2003 (42 % underestimate); coefficients of determination, a measure of the extent to which modelled data are able to explain observed data at validation periods, with just two exceptions, were within a range of 0.67 – 0.98. Several sources of error and uncertainty were identified, relating predominantly to uncertainties in measured flux data used to evaluate ETMODIS, uncertainties in MODIS LAI submitted to ETMODIS, and uncertainties in ETMODIS itself, including model assumptions, and specific uncertainties relating to various inputs; further application of the model is required to test these uncertainties however, and establish confidence limits in performance. Nevertheless, the results of this study suggest that the technique is generally able to produce estimates of vegetation water use to within reasonably close approximations of measurements acquired using micrometeorological instruments, with r² values within the range of other peer-reviewed satellite remote sensing-based approaches.
- Full Text:
- Date Issued: 2014
- Authors: Weideman, Craig Ivan
- Date: 2014
- Subjects: Plants -- Water requirements -- South Africa , Evaporation (Meteorology) -- Measurement , Satellite meteorology , Micrometeorology , Evapotranspiration , MODIS (Spectroradiometer)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4779 , http://hdl.handle.net/10962/d1012078 , Plants -- Water requirements -- South Africa , Evaporation (Meteorology) -- Measurement , Satellite meteorology , Micrometeorology , Evapotranspiration , MODIS (Spectroradiometer)
- Description: Recent advances in satellite sensor technology and micrometeorological instrumentation for water flux measurement, coupled with the expansion of automatic weather station networks that provide routine measurements of near-surface climate variables, present new opportunities for combining satellite and ground-based instrumentation to obtain distributed estimates of vegetation water use over wide areas in South Africa. In this study, a novel approach is tested, which uses satellite leaf area index (LAI) data retrieved by the Moderate Resolution Imaging Spectroradiometer (MODIS) to inform the FAO-56 Penman-Monteith equation for calculating reference evaporation (ET₀) of vegetation phenological activity. The model (ETMODIS) was validated at four sites in three different ecosystems across the country, including semi-arid savanna near Skukuza, mixed community grassland at Bellevue, near Pietermaritzburg, and Groenkop, a mixed evergreen indigenous forest near George, to determine potential for application over wider areas of the South African land surface towards meeting water resource management objectives. At Skukuza, evaluated against 170 days of flux data measured at a permanent eddy covariance (EC) flux tower in 2007, the model (ETMODIS) predicted 194.8 mm evapotranspiration relative to 148.9 mm measured fluxes, an overestimate of 31.7 %, (r² = 0.67). At an adjacent site, evaluated against flux data measured on two discrete periods of seven and eight days in February and May of 2005 using a large aperture scintillometer (SLS), ETMODIS predicted 27.4 mm and 6.7 mm evapotranspiration respectively, relative to measured fluxes of 32.5 and 8.2 mm, underestimates of 15.7 % and 18.3 % in each case (r² = 0.67 and 0.34, respectively). At Bellevue, evaluated against 235 days of evapotranspiration data measured using a surface layer scintillometer (SLS) in 2003, ETMODIS predicted 266.9 mm evapotranspiration relative to 460.2 mm measured fluxes, an underestimate of 42 % (r² = 0.67). At Groenkop, evaluated against data measured using a SLS over three discrete periods of four, seven and seven days in February, June and September/October respectively, ETMODIS predicted 9.7 mm, 10.3 mm and 17.0 mm evapotranspiration, relative to measured fluxes of 10.9 mm, 14.6 mm and 23. 9 mm, underestimates of 22.4 %, 11.2 % and 24.1 % in each case (r² = 0.98, 0.43 and 0.80, respectively). Total measured evapotranspiration exceeded total modelled evapotranspiration in all cases, with the exception of the flux tower site at Skukuza, where evapotranspiration was overestimated by ETMODIS by 31.7 % relative to measured (EC) values for the 170 days in 2007 where corresponding modelled and measured data were available. The most significant differences in measured versus predicted data were recorded at the Skukuza flux tower site in 2007 (31.7 % overestimate), and the Bellevue SLS flux site in 2003 (42 % underestimate); coefficients of determination, a measure of the extent to which modelled data are able to explain observed data at validation periods, with just two exceptions, were within a range of 0.67 – 0.98. Several sources of error and uncertainty were identified, relating predominantly to uncertainties in measured flux data used to evaluate ETMODIS, uncertainties in MODIS LAI submitted to ETMODIS, and uncertainties in ETMODIS itself, including model assumptions, and specific uncertainties relating to various inputs; further application of the model is required to test these uncertainties however, and establish confidence limits in performance. Nevertheless, the results of this study suggest that the technique is generally able to produce estimates of vegetation water use to within reasonably close approximations of measurements acquired using micrometeorological instruments, with r² values within the range of other peer-reviewed satellite remote sensing-based approaches.
- Full Text:
- Date Issued: 2014
Liquidity linkages between the South African bond and equity markets
- Authors: Magagula, Sifiso Charles
- Date: 2014
- Subjects: Financial crises , Global Financial Crisis, 2000-2008 , Financial risk management
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:9029 , http://hdl.handle.net/10948/d1020758
- Description: Purpose - The study sought to examine the liquidity linkages between the South African bond and equity markets before the global financial crisis in 2008. Design/methodology/approach: The window of observation covered the period January 2000 to September 2008. In order to ensure robustness in the estimation, the study used foreign participation in the various markets as an additional measure of liquidity. The other liquidity measures considered in the study were volume and value traded of the various securities respectively. Time series modeling techniques were used in the estimation. An unrestricted vector autoregressive (VAR) model was estimated following which the standard innovation accounting techniques, impulse response functions and forecast error variance decompositions were applied. In the empirical analysis, the Granger-causality between the two markets was also used. Findings - While all the liquidity measures suggest the existence of linkages between the bond and equity markets, the direction of causality was found to be unidirectional from equity to the bond market using the volume and value measures. On the other hand, the foreign participation measure of liquidity suggests bi-directional causality. The study also provides evidence of long run relationship between key macroeconomic variables such as inflation, exchange rate and interest rate on one hand and liquidity in the debt and equity markets on the other. As empirical findings indicates that the linkages in liquidity between these markets positive, this consistent with studies conducted by Chordia et al (2003 & 2005) and Engsted and Tanggaard (2000) who found the relationship was a positive one. When volumes of trade and trade values, the study find evidence on uni-directional causality and strong bi-directional causality is evidence when foreign investor participation is used as a liquidity measure. In summary, there is a strong evidence liquidity linkage between the bond and equity market from the empirical results.
- Full Text:
- Date Issued: 2014
- Authors: Magagula, Sifiso Charles
- Date: 2014
- Subjects: Financial crises , Global Financial Crisis, 2000-2008 , Financial risk management
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:9029 , http://hdl.handle.net/10948/d1020758
- Description: Purpose - The study sought to examine the liquidity linkages between the South African bond and equity markets before the global financial crisis in 2008. Design/methodology/approach: The window of observation covered the period January 2000 to September 2008. In order to ensure robustness in the estimation, the study used foreign participation in the various markets as an additional measure of liquidity. The other liquidity measures considered in the study were volume and value traded of the various securities respectively. Time series modeling techniques were used in the estimation. An unrestricted vector autoregressive (VAR) model was estimated following which the standard innovation accounting techniques, impulse response functions and forecast error variance decompositions were applied. In the empirical analysis, the Granger-causality between the two markets was also used. Findings - While all the liquidity measures suggest the existence of linkages between the bond and equity markets, the direction of causality was found to be unidirectional from equity to the bond market using the volume and value measures. On the other hand, the foreign participation measure of liquidity suggests bi-directional causality. The study also provides evidence of long run relationship between key macroeconomic variables such as inflation, exchange rate and interest rate on one hand and liquidity in the debt and equity markets on the other. As empirical findings indicates that the linkages in liquidity between these markets positive, this consistent with studies conducted by Chordia et al (2003 & 2005) and Engsted and Tanggaard (2000) who found the relationship was a positive one. When volumes of trade and trade values, the study find evidence on uni-directional causality and strong bi-directional causality is evidence when foreign investor participation is used as a liquidity measure. In summary, there is a strong evidence liquidity linkage between the bond and equity market from the empirical results.
- Full Text:
- Date Issued: 2014