Tomographic imaging of East African equatorial ionosphere and study of equatorial plasma bubbles
- Authors: Giday, Nigussie Mezgebe
- Date: 2018
- Subjects: Ionosphere -- Africa, Central , Tomography -- Africa, Central , Global Positioning System , Neural networks (Computer science) , Space environment , Multi-Instrument Data Analysis System (MIDAS) , Equatorial plasma bubbles
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63980 , vital:28516
- Description: In spite of the fact that the African ionospheric equatorial region has the largest ground footprint along the geomagnetic equator, it has not been well studied due to the absence of adequate ground-based instruments. This thesis presents research on both tomographic imaging of the African equatorial ionosphere and the study of the ionospheric irregularities/equatorial plasma bubbles (EPBs) under varying geomagnetic conditions. The Multi-Instrument Data Analysis System (MIDAS), an inversion algorithm, was investigated for its validity and ability as a tool to reconstruct multi-scaled ionospheric structures for different geomagnetic conditions. This was done for the narrow East African longitude sector with data from the available ground Global Positioning Sys-tem (GPS) receivers. The MIDAS results were compared to the results of two models, namely the IRI and GIM. MIDAS results compared more favourably with the observation vertical total electron content (VTEC), with a computed maximum correlation coefficient (r) of 0.99 and minimum root-mean-square error (RMSE) of 2.91 TECU, than did the results of the IRI-2012 and GIM models with maximum r of 0.93 and 0.99, and minimum RMSE of 13.03 TECU and 6.52 TECU, respectively, over all the test stations and validation days. The ability of MIDAS to reconstruct storm-time TEC was also compared with the results produced by the use of a Artificial Neural Net-work (ANN) for the African low- and mid-latitude regions. In terms of latitude, on average,MIDAS performed 13.44 % better than ANN in the African mid-latitudes, while MIDAS under performed in low-latitudes. This thesis also reports on the effects of moderate geomagnetic conditions on the evolution of EPBs and/or ionospheric irregularities during their season of occurrence using data from (or measurements by) space- and ground-based instruments for the east African equatorial sector. The study showed that the strength of daytime equatorial electrojet (EEJ), the steepness of the TEC peak-to-trough gradient and/or the meridional/transequatorial thermospheric winds sometimes have collective/interwoven effects, while at other times one mechanism dominates. In summary, this research offered tomographic results that outperform the results of the commonly used (“standard”) global models (i.e. IRI and GIM) for a longitude sector of importance to space weather, which has not been adequately studied due to a lack of sufficient instrumentation.
- Full Text:
- Date Issued: 2018
- Authors: Giday, Nigussie Mezgebe
- Date: 2018
- Subjects: Ionosphere -- Africa, Central , Tomography -- Africa, Central , Global Positioning System , Neural networks (Computer science) , Space environment , Multi-Instrument Data Analysis System (MIDAS) , Equatorial plasma bubbles
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63980 , vital:28516
- Description: In spite of the fact that the African ionospheric equatorial region has the largest ground footprint along the geomagnetic equator, it has not been well studied due to the absence of adequate ground-based instruments. This thesis presents research on both tomographic imaging of the African equatorial ionosphere and the study of the ionospheric irregularities/equatorial plasma bubbles (EPBs) under varying geomagnetic conditions. The Multi-Instrument Data Analysis System (MIDAS), an inversion algorithm, was investigated for its validity and ability as a tool to reconstruct multi-scaled ionospheric structures for different geomagnetic conditions. This was done for the narrow East African longitude sector with data from the available ground Global Positioning Sys-tem (GPS) receivers. The MIDAS results were compared to the results of two models, namely the IRI and GIM. MIDAS results compared more favourably with the observation vertical total electron content (VTEC), with a computed maximum correlation coefficient (r) of 0.99 and minimum root-mean-square error (RMSE) of 2.91 TECU, than did the results of the IRI-2012 and GIM models with maximum r of 0.93 and 0.99, and minimum RMSE of 13.03 TECU and 6.52 TECU, respectively, over all the test stations and validation days. The ability of MIDAS to reconstruct storm-time TEC was also compared with the results produced by the use of a Artificial Neural Net-work (ANN) for the African low- and mid-latitude regions. In terms of latitude, on average,MIDAS performed 13.44 % better than ANN in the African mid-latitudes, while MIDAS under performed in low-latitudes. This thesis also reports on the effects of moderate geomagnetic conditions on the evolution of EPBs and/or ionospheric irregularities during their season of occurrence using data from (or measurements by) space- and ground-based instruments for the east African equatorial sector. The study showed that the strength of daytime equatorial electrojet (EEJ), the steepness of the TEC peak-to-trough gradient and/or the meridional/transequatorial thermospheric winds sometimes have collective/interwoven effects, while at other times one mechanism dominates. In summary, this research offered tomographic results that outperform the results of the commonly used (“standard”) global models (i.e. IRI and GIM) for a longitude sector of importance to space weather, which has not been adequately studied due to a lack of sufficient instrumentation.
- Full Text:
- Date Issued: 2018
Waste management knowledge, its production, recontextualisation and circulation in Expanded Public Works Programme (EPWP) training programmes
- Authors: Giqwa, Nomfundiso Louisa
- Date: 2018
- Subjects: Refuse and refuse disposal -- South Africa -- Eastern Cape , South Africa. Expanded Public Works Programme , Refuse and refuse disposal -- Employees -- Training of -- South Africa -- Eastern Cape , South Africa. Department of Environmental Affairs , Knowledge, Theory of , Knowledge, Sociology of
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63729 , vital:28478
- Description: This study set out to investigate the structuring, recontextualisation and circulation of waste management knowledge in the South African environmental Expanded Public Works Programme (EPWP) Waste Management Projects. In this thesis these projects also referred to as the Working on Waste (WoW) programme or focus area within the Environmental Protection and Infrastructure Programme (EPIP) hosted by the National Department of Environmental Affairs. Expanded Public Work Programmes are a strategy used by governments to address unemployment and in South Africa; the programmes also seek to address a need for skills development. In this study, the focus is on EPWP waste management knowledge, training programmes and activities only. With waste management knowledge as the core interest, the focus of the investigation was on knowledge circulation of waste management via informal (participation in the project) and formal training of workers at Level 2 National Qualifications Framework (NQF). The study started by firstly investigating what waste management knowledge is produced in the Field of Production via scientific research and policy. It then studied how this waste management knowledge is recontextualised into qualifications and skills programmes designed in the official recontextualising field and learning materials and training programmes designed and offered in the professional recontextualising field. The study also focused on the knowledge of workers and their experience of training in the EPWP workplaces, with an emphasis on rural workplaces. This is where the Department of Environmental Affairs (DEA) is placing emphasis on training for job creation, empowerment and skills development, and it is also where a number of EPWP Working on Waste programmes are being implemented. The aim was also to develop an understanding of how knowledge circulates amongst learners in training sessions and in workplaces. To do this, I drew on Bernstein’s theory of the pedagogical device which provides theoretical lenses and a language of description to explain how knowledge is recontextualised from the field of production to the field of reproduction. To investigate the structuring of this knowledge by official and pedagogical recontextualisers, I drew on the work of Maton, who offers a Legitimation Code Theory to explain the principles structuring knowledge, of which I used specialisation and semantics (two of his suite of knowledge structuring principles) for analysis. The questions that guided the study throughout were: 1. What is the structure of legitimate knowledge and knowers in waste management? 2. What are the underlying principles underpinning knowledge and knowers in waste management? 3. How is the knowledge recontextualised in waste management training qualifications, documents and manuals for worker training at NQF Level 2? 4. How is the knowledge reproduced and evaluated in the waste management EPWP training activities (formal) and workplaces (informal)? 5. How does waste management knowledge circulate amongst the workers in the EPWP training activities and workplaces? For this study I used the case study method, focusing only on one field or DEA EPWP focus area (waste management) and one programme (EPWP Working on Waste), looking in more depth at two cases (two similar types of projects) within the EPWP Working on Waste programme, though they are situated in different areas and though I could only carry through observations of actual workplace training in one of the two sites due to contextual circumstances. The first project was situated in the Amathole District Municipality while the second one was situated in the Chris Hani District Municipality, both of which are in the rural towns of the former Transkei region in the Eastern Cape, South Africa. This area has been at the forefront in accessing funding for these projects due to the level of poverty surrounding these towns and the inability of the local government sphere to deliver on its mandate in the region. Data was collected through document analysis, questionnaires, interviews and observations. Documents analysed were research documents produced by researchers at the level of production as well as legal frameworks guiding waste management processes in this country. Qualifications and Unit Standards at Level 2, as well as training materials designed by providers were analysed. Training in one of the projects was observed and workers in both sites were interviewed twice. The main finding of the study is that waste management knowledge is characterised by interdisciplinarity and a strong epistemic relation which emphasises procedural and technical forms of knowledge. The study found that the knowledge constructed in the field, as well as the policies, qualifications and training programmes are all consequently characterised by a strong epistemic code (ER+) and a weak social relations code (SR-). The study also identified a ‘code clash’ with the knowledge of workers in rural towns whose knowledge and experience of waste management was found to reflect a strong social relation (SR+) and weak epistemic code (ER-), a pattern which was traced back to a similar code in waste management knowledge at home and school (i.e. workers’ prior knowledge and learning experiences). This created difficulties for the trainers who sought to use strategies of descending from the abstract to the concrete in various ‘descending’ semantic waves that tended to move from high levels of semantic density (SD+) to lower levels of semantic density (SD-) as the training provider sought to contextualise a range of concepts. This was the main strategy identified for mediating waste management knowledge reflecting a dominant pattern of SD+/SG- to SD-/SG+ (with SG meaning semantic gravity). This shows that the trainer seldom started mediating concepts from the basis of workers’ prior knowledge and experience and observations showed little responsiveness from workers resulting from this strategy. Despite this, the study found that workers did develop an improved understanding of specialised waste management knowledge over time, especially through observing and doing more complex tasks in the workplace. The study offers a model for addressing the pedagogical difficulty identified around the code clash, and suggests that further attention needs to be given to ‘ascending’ from the concrete to the abstract in pedagogical practices. The study also pointed to the need for a more inclusive knowledge framework for waste management training, especially in the field of recontextualisation (both the official and pedagogical recontextualisation fields) to extend possibilities for workers to learn more about economic potential and access routes into more sustainable jobs. It identifies the need for a more systemic approach to waste management in rural towns and municipalities, improved compliance and also proposes that better waste management practices are modelled to avoid performative contradictions between the knowledge promoted in the field of production and the official and pedagogical recontextualising fields and the field of reproduction, where workers are learning this knowledge via a mix of accredited training and exposure to participation in waste management practices. This study contributes to new knowledge in that it offers an epistemically grounded and theorised pedagogical process model for Level 2 Waste Management Training (in the EPWP programmes, but potentially also more broadly) that accords with the need for a strong epistemic relation code (ER+) embodied in the need for learning scientific and technical waste management knowledge and procedures. It also addresses workers’ needs for greater epistemic access and participation in knowledge building and application of waste management knowledge in praxis as per the purpose of the EPW training programmes, thereby potentially opening up more sustainable learning pathways for them out of poverty through the EPWP training opportunities. The study has pointed to key areas for further research, including further research on the proposed model, further research into Level 2 pedagogical practices and further research into the foundations of waste management learning in schools. Most of the workers who were participating in the training in the EPWP programmes were educated at above Level 2 before participating in the projects, yet their knowledge and experience of waste management was mostly based on everyday knowledge, pointing to an absence of adequate waste management education in schools in rural contexts in South Africa. The study has also made various recommendations for improving waste management education and training at Level 2 in EPWP programmes in rural areas in particular (but potentially also more widely), notably the need to develop a more inclusive knowledge framework that includes historical and economic knowledge more explicitly at all levels of the recontextualisation process; improved pedagogical and assessment practices that take better account of learners knowledge and experiences in knowledge building processes; and giving attention to structural and systemic approaches to waste management in rural areas to avoid performative contradictions that arise between the knowledge being promoted in the field of production and the field of reproduction and the actual context of waste management.
- Full Text:
- Date Issued: 2018
- Authors: Giqwa, Nomfundiso Louisa
- Date: 2018
- Subjects: Refuse and refuse disposal -- South Africa -- Eastern Cape , South Africa. Expanded Public Works Programme , Refuse and refuse disposal -- Employees -- Training of -- South Africa -- Eastern Cape , South Africa. Department of Environmental Affairs , Knowledge, Theory of , Knowledge, Sociology of
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63729 , vital:28478
- Description: This study set out to investigate the structuring, recontextualisation and circulation of waste management knowledge in the South African environmental Expanded Public Works Programme (EPWP) Waste Management Projects. In this thesis these projects also referred to as the Working on Waste (WoW) programme or focus area within the Environmental Protection and Infrastructure Programme (EPIP) hosted by the National Department of Environmental Affairs. Expanded Public Work Programmes are a strategy used by governments to address unemployment and in South Africa; the programmes also seek to address a need for skills development. In this study, the focus is on EPWP waste management knowledge, training programmes and activities only. With waste management knowledge as the core interest, the focus of the investigation was on knowledge circulation of waste management via informal (participation in the project) and formal training of workers at Level 2 National Qualifications Framework (NQF). The study started by firstly investigating what waste management knowledge is produced in the Field of Production via scientific research and policy. It then studied how this waste management knowledge is recontextualised into qualifications and skills programmes designed in the official recontextualising field and learning materials and training programmes designed and offered in the professional recontextualising field. The study also focused on the knowledge of workers and their experience of training in the EPWP workplaces, with an emphasis on rural workplaces. This is where the Department of Environmental Affairs (DEA) is placing emphasis on training for job creation, empowerment and skills development, and it is also where a number of EPWP Working on Waste programmes are being implemented. The aim was also to develop an understanding of how knowledge circulates amongst learners in training sessions and in workplaces. To do this, I drew on Bernstein’s theory of the pedagogical device which provides theoretical lenses and a language of description to explain how knowledge is recontextualised from the field of production to the field of reproduction. To investigate the structuring of this knowledge by official and pedagogical recontextualisers, I drew on the work of Maton, who offers a Legitimation Code Theory to explain the principles structuring knowledge, of which I used specialisation and semantics (two of his suite of knowledge structuring principles) for analysis. The questions that guided the study throughout were: 1. What is the structure of legitimate knowledge and knowers in waste management? 2. What are the underlying principles underpinning knowledge and knowers in waste management? 3. How is the knowledge recontextualised in waste management training qualifications, documents and manuals for worker training at NQF Level 2? 4. How is the knowledge reproduced and evaluated in the waste management EPWP training activities (formal) and workplaces (informal)? 5. How does waste management knowledge circulate amongst the workers in the EPWP training activities and workplaces? For this study I used the case study method, focusing only on one field or DEA EPWP focus area (waste management) and one programme (EPWP Working on Waste), looking in more depth at two cases (two similar types of projects) within the EPWP Working on Waste programme, though they are situated in different areas and though I could only carry through observations of actual workplace training in one of the two sites due to contextual circumstances. The first project was situated in the Amathole District Municipality while the second one was situated in the Chris Hani District Municipality, both of which are in the rural towns of the former Transkei region in the Eastern Cape, South Africa. This area has been at the forefront in accessing funding for these projects due to the level of poverty surrounding these towns and the inability of the local government sphere to deliver on its mandate in the region. Data was collected through document analysis, questionnaires, interviews and observations. Documents analysed were research documents produced by researchers at the level of production as well as legal frameworks guiding waste management processes in this country. Qualifications and Unit Standards at Level 2, as well as training materials designed by providers were analysed. Training in one of the projects was observed and workers in both sites were interviewed twice. The main finding of the study is that waste management knowledge is characterised by interdisciplinarity and a strong epistemic relation which emphasises procedural and technical forms of knowledge. The study found that the knowledge constructed in the field, as well as the policies, qualifications and training programmes are all consequently characterised by a strong epistemic code (ER+) and a weak social relations code (SR-). The study also identified a ‘code clash’ with the knowledge of workers in rural towns whose knowledge and experience of waste management was found to reflect a strong social relation (SR+) and weak epistemic code (ER-), a pattern which was traced back to a similar code in waste management knowledge at home and school (i.e. workers’ prior knowledge and learning experiences). This created difficulties for the trainers who sought to use strategies of descending from the abstract to the concrete in various ‘descending’ semantic waves that tended to move from high levels of semantic density (SD+) to lower levels of semantic density (SD-) as the training provider sought to contextualise a range of concepts. This was the main strategy identified for mediating waste management knowledge reflecting a dominant pattern of SD+/SG- to SD-/SG+ (with SG meaning semantic gravity). This shows that the trainer seldom started mediating concepts from the basis of workers’ prior knowledge and experience and observations showed little responsiveness from workers resulting from this strategy. Despite this, the study found that workers did develop an improved understanding of specialised waste management knowledge over time, especially through observing and doing more complex tasks in the workplace. The study offers a model for addressing the pedagogical difficulty identified around the code clash, and suggests that further attention needs to be given to ‘ascending’ from the concrete to the abstract in pedagogical practices. The study also pointed to the need for a more inclusive knowledge framework for waste management training, especially in the field of recontextualisation (both the official and pedagogical recontextualisation fields) to extend possibilities for workers to learn more about economic potential and access routes into more sustainable jobs. It identifies the need for a more systemic approach to waste management in rural towns and municipalities, improved compliance and also proposes that better waste management practices are modelled to avoid performative contradictions between the knowledge promoted in the field of production and the official and pedagogical recontextualising fields and the field of reproduction, where workers are learning this knowledge via a mix of accredited training and exposure to participation in waste management practices. This study contributes to new knowledge in that it offers an epistemically grounded and theorised pedagogical process model for Level 2 Waste Management Training (in the EPWP programmes, but potentially also more broadly) that accords with the need for a strong epistemic relation code (ER+) embodied in the need for learning scientific and technical waste management knowledge and procedures. It also addresses workers’ needs for greater epistemic access and participation in knowledge building and application of waste management knowledge in praxis as per the purpose of the EPW training programmes, thereby potentially opening up more sustainable learning pathways for them out of poverty through the EPWP training opportunities. The study has pointed to key areas for further research, including further research on the proposed model, further research into Level 2 pedagogical practices and further research into the foundations of waste management learning in schools. Most of the workers who were participating in the training in the EPWP programmes were educated at above Level 2 before participating in the projects, yet their knowledge and experience of waste management was mostly based on everyday knowledge, pointing to an absence of adequate waste management education in schools in rural contexts in South Africa. The study has also made various recommendations for improving waste management education and training at Level 2 in EPWP programmes in rural areas in particular (but potentially also more widely), notably the need to develop a more inclusive knowledge framework that includes historical and economic knowledge more explicitly at all levels of the recontextualisation process; improved pedagogical and assessment practices that take better account of learners knowledge and experiences in knowledge building processes; and giving attention to structural and systemic approaches to waste management in rural areas to avoid performative contradictions that arise between the knowledge being promoted in the field of production and the field of reproduction and the actual context of waste management.
- Full Text:
- Date Issued: 2018
Perceptions of Ulwaluko in a Liberal Democratic State: is multiculturalism beneficial to AmaXhosa women in the Eastern Cape province of South Africa?
- Authors: Gogela, Kholisa B
- Date: 2018
- Subjects: Initiation rites -- South Africa -- Eastern Cape , Circumcision -- South Africa -- Eastern Cape , Stigma (Social psychology) -- South Africa -- Eastern Cape , Xhosa (African people) -- South Africa -- Eastern Cape , Women -- Attitudes , Multiculturalism -- South Africa -- Eastern Cape , Women's rights -- South Africa -- Eastern Cape , Male domination (Social structure) -- South Africa -- Eastern Cape , Sex discrimination against women -- South Africa -- Eastern Cape , Ulwaluko
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61780 , vital:28059
- Description: This exploratory qualitative study sought to investigate the views and perceptions of women on their experiences of ulwaluko, a traditional rite practised by amaXhosa in the Eastern Cape province of South Africa. Ulwaluko is also known as isiko lokwaluka or ukoluka in isiXhosa. The concept refers not only to the act of circumcision that occurs during the initiation ritual but the entire process a boy goes through in observing this practice. Ulwaluko is performed in the belief that it will transform boys into accountable and responsible citizens of the society who are fully committed and dedicated to the tenets and standards of nation building. All amaXhosa boys are expected to undergo this tradition to be considered men. Failure to go to the initiation school usually results in social stigma and complete banishment by the society. There is an abundance of literature on studies that have been conducted on male circumcision (and not ulwaluko) which is performed for hygiene and religious purposes worldwide. With regards to ulwaluko of amaXhosa, research studies that have been conducted appear to lean mainly towards biomedical and public health aspects of the ritual. There seems to be an even bigger proportion of studies whose objective was to examine the relationship between circumcision and HIV/AIDS. From the literature review, it was not difficult to observe the pervasive paucity of research studies on women in relation to initiation (and that of amaXhosa in particular), with regards to their inclusion or exclusion in the practice, their feelings, perceptions, experiences and attitudes towards the custom. It is for this reason that I found it crucial to conduct this study. The main research question I sought to answer in this investigation was: are the human rights and gender equality rights of women, as entrenched in the multicultural principles that underpin South Africa’s liberal, democratic order, adequately protected? In other words, could the individual rights of women (or gender rights) that are endorsed by liberalism, be deferred in the interest of respecting traditions and cultural values associated with ulwaluko? And if they are, I further ask: could the deferral of such rights be legitimate in the face of South Africa’s legal framework? The nature of this study places it in the qualitative paradigm, and interpretive phenomenology was the most appropriate research design to carry out the investigation. Multiculturalism is a principle at the centre of liberalism, and as a framework for this study, I contrast and reconcile it with feminism. While multiculturalism is concerned with protecting traditions and cultures of minority groups, feminism is concerned about women’s emancipation. I used the non-probability purposive sampling to select participants who were rich in information; and I made use of community structures to gain entry into research sites and to seek permission to carry out the investigation. I conducted the pilot study in Mdantsane, a township in the Buffalo City Municipality; and I gathered data in two research sites, namely: Flagstaff in Mpondondoland and Grahamstown in the Makana Local Municipality. I employed two qualitative methods to collect information, namely: focus group discussions (FGDs) and semi-structured in-depth interviews. A total of 70 participants took part in the study. 60 women participated in 8 focus groups and 10 participated in-depth interviews. Their ages ranged between 31 and 82 years. I recorded all the FGDs and semi-structured in-depth interviews that I conducted, for ease of transcription and translation. To interprete and analyze data, I applied the general inductive approach which I later substantiated with the use of NVivo 8, a computer assisted qualitative data analysis (CAQDAS). This resulted in the identification of four themes and their related sub-themes which I compared and contrasted with literature review and the theoretical framework, so as to make sense of the information I generated from the data collection process. I also discussed the results in line with the four goals of the study. The findings of this inquiry suggest a number of factors about ulwaluko, the following being the most significant: that firstly, although the rite is espoused and celebrated by some women as a significant cultural practice among amaXhosa, for others it is synonymous with patriarchy and hegemony. Secondly, women felt largely excluded, claiming that they were relegated to a subordinate position in society. For this reason, as well as because of the biomedical and other socio-political concerns associated with the practice, some women resented the custom. Thirdly, participants were divided about whether the practice should be continued or abolished; and these differences manifested within and between different regions. Fourthly, the results also demonstrated that the norms and values applied in ulwaluko are in contravention of the fundamental principles of a liberal state in that universal human rights are infringed upon through exclusionary practices. In this case the woman’s voice is muted; and this results in the denial of human agency. The study however, also revealed the emergence of shifting patterns in some parts of the province where an effort to include women appears to be taking place. Fifth and last, the enquiry demonstrated that ulwaluko is deeply entrenched among amaXhosa; that it has stood the test of time and is unlikely to be discontinued. Based on the results, I recommend that creative and transformative ways of addressing the evident clash between the provision of individual rights by the state and the recognition of ulwaluko as a cultural practice (which is perceived by some as harmful to women) be sought. To achieve this objective I make the following recommendations: 1) establishment and utilization of gender equality programmes; 2) modification of values and norms of the custom; 3) representation of women in decision-making structures; 4) establishment of collaborative networks; 5) widening of access to services (such as chapter nine institutions and national gender machinery); 6) documentation and sharing of effective and inclusive practices as well as; 7) creating awareness on initiation legislation.
- Full Text:
- Date Issued: 2018
- Authors: Gogela, Kholisa B
- Date: 2018
- Subjects: Initiation rites -- South Africa -- Eastern Cape , Circumcision -- South Africa -- Eastern Cape , Stigma (Social psychology) -- South Africa -- Eastern Cape , Xhosa (African people) -- South Africa -- Eastern Cape , Women -- Attitudes , Multiculturalism -- South Africa -- Eastern Cape , Women's rights -- South Africa -- Eastern Cape , Male domination (Social structure) -- South Africa -- Eastern Cape , Sex discrimination against women -- South Africa -- Eastern Cape , Ulwaluko
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61780 , vital:28059
- Description: This exploratory qualitative study sought to investigate the views and perceptions of women on their experiences of ulwaluko, a traditional rite practised by amaXhosa in the Eastern Cape province of South Africa. Ulwaluko is also known as isiko lokwaluka or ukoluka in isiXhosa. The concept refers not only to the act of circumcision that occurs during the initiation ritual but the entire process a boy goes through in observing this practice. Ulwaluko is performed in the belief that it will transform boys into accountable and responsible citizens of the society who are fully committed and dedicated to the tenets and standards of nation building. All amaXhosa boys are expected to undergo this tradition to be considered men. Failure to go to the initiation school usually results in social stigma and complete banishment by the society. There is an abundance of literature on studies that have been conducted on male circumcision (and not ulwaluko) which is performed for hygiene and religious purposes worldwide. With regards to ulwaluko of amaXhosa, research studies that have been conducted appear to lean mainly towards biomedical and public health aspects of the ritual. There seems to be an even bigger proportion of studies whose objective was to examine the relationship between circumcision and HIV/AIDS. From the literature review, it was not difficult to observe the pervasive paucity of research studies on women in relation to initiation (and that of amaXhosa in particular), with regards to their inclusion or exclusion in the practice, their feelings, perceptions, experiences and attitudes towards the custom. It is for this reason that I found it crucial to conduct this study. The main research question I sought to answer in this investigation was: are the human rights and gender equality rights of women, as entrenched in the multicultural principles that underpin South Africa’s liberal, democratic order, adequately protected? In other words, could the individual rights of women (or gender rights) that are endorsed by liberalism, be deferred in the interest of respecting traditions and cultural values associated with ulwaluko? And if they are, I further ask: could the deferral of such rights be legitimate in the face of South Africa’s legal framework? The nature of this study places it in the qualitative paradigm, and interpretive phenomenology was the most appropriate research design to carry out the investigation. Multiculturalism is a principle at the centre of liberalism, and as a framework for this study, I contrast and reconcile it with feminism. While multiculturalism is concerned with protecting traditions and cultures of minority groups, feminism is concerned about women’s emancipation. I used the non-probability purposive sampling to select participants who were rich in information; and I made use of community structures to gain entry into research sites and to seek permission to carry out the investigation. I conducted the pilot study in Mdantsane, a township in the Buffalo City Municipality; and I gathered data in two research sites, namely: Flagstaff in Mpondondoland and Grahamstown in the Makana Local Municipality. I employed two qualitative methods to collect information, namely: focus group discussions (FGDs) and semi-structured in-depth interviews. A total of 70 participants took part in the study. 60 women participated in 8 focus groups and 10 participated in-depth interviews. Their ages ranged between 31 and 82 years. I recorded all the FGDs and semi-structured in-depth interviews that I conducted, for ease of transcription and translation. To interprete and analyze data, I applied the general inductive approach which I later substantiated with the use of NVivo 8, a computer assisted qualitative data analysis (CAQDAS). This resulted in the identification of four themes and their related sub-themes which I compared and contrasted with literature review and the theoretical framework, so as to make sense of the information I generated from the data collection process. I also discussed the results in line with the four goals of the study. The findings of this inquiry suggest a number of factors about ulwaluko, the following being the most significant: that firstly, although the rite is espoused and celebrated by some women as a significant cultural practice among amaXhosa, for others it is synonymous with patriarchy and hegemony. Secondly, women felt largely excluded, claiming that they were relegated to a subordinate position in society. For this reason, as well as because of the biomedical and other socio-political concerns associated with the practice, some women resented the custom. Thirdly, participants were divided about whether the practice should be continued or abolished; and these differences manifested within and between different regions. Fourthly, the results also demonstrated that the norms and values applied in ulwaluko are in contravention of the fundamental principles of a liberal state in that universal human rights are infringed upon through exclusionary practices. In this case the woman’s voice is muted; and this results in the denial of human agency. The study however, also revealed the emergence of shifting patterns in some parts of the province where an effort to include women appears to be taking place. Fifth and last, the enquiry demonstrated that ulwaluko is deeply entrenched among amaXhosa; that it has stood the test of time and is unlikely to be discontinued. Based on the results, I recommend that creative and transformative ways of addressing the evident clash between the provision of individual rights by the state and the recognition of ulwaluko as a cultural practice (which is perceived by some as harmful to women) be sought. To achieve this objective I make the following recommendations: 1) establishment and utilization of gender equality programmes; 2) modification of values and norms of the custom; 3) representation of women in decision-making structures; 4) establishment of collaborative networks; 5) widening of access to services (such as chapter nine institutions and national gender machinery); 6) documentation and sharing of effective and inclusive practices as well as; 7) creating awareness on initiation legislation.
- Full Text:
- Date Issued: 2018
Detection of early warning signs of currency crises in South Africa
- Gondoza, Gladys Nicola Fernandes
- Authors: Gondoza, Gladys Nicola Fernandes
- Date: 2018
- Subjects: Financial crises -- 21st century
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/30238 , vital:30905
- Description: In a world characterised by globalisation, particularly increased financial integration and capital mobility, international economic theory stipulates that countries rather maintain a floating exchange rate system than a fixed exchange rate system in order to have less susceptibility to currency crises (Glick & Hutchison, 2011). South Africa, the economic powerhouse of Africa, is an interesting case to examine. It has a floating exchange rate and should thus be more resistant to currency crises due to market adjustment expectations that limit the build-up of pressure in its foreign exchange markets. South Africa’s foreign exchange market is characterised as volatile with recurring turbulent periods with currency crises observed in 1996, 1998, 2001 and 2008, of which the 2007/2008 global financial crisis was the worst the world had experienced since the Great Depression of the 1930s and it had a significant, negative impact on the South African economy and certainly exposed the country’s vulnerably (South African Reserve Bank, 2012). Having experienced these periods of currency crisis in South Africa and with no specific tool adequately tested and developed for the South African economy to accurately detect such an event before its occurrence, this research was an attempt to fill this gap within the economics discipline. The purpose of this thesis was to examine and make use of Early Warning System (EWS) models to ascertain which one best identifies potential early warning signs of a currency crisis in South Africa. To achieve this, the study tested two standard and commonly used EWS models, namely the Signals and probit models. Added to these approaches, two newer EWS models, namely the Markov regime switching model and the artificial neural networks model were tested. To date only two studies on EWS models for currency crises have been conducted in South Africa. Knedlik (2006) used the signals approach and Knedlik and Scheufele (2007) used the signals, probit/logit and Markov regime switching approaches. Both studies recommended that further research was needed. With this in mind, this thesis built on these studies by extending the sample period under observation from 1993/02 to 2017/03 to fully capture the probability of the global financial crisis of 2007/2008. This study separated the sample period into two parts, a first period (1993/02 – 2004/12) catering for the July 1998 and December 2001 crises and a second period (2005/01 – 2017/03) catering for the October 2008 crisis. This was done to separately observe how well the models detected early warning signs of the October 2008 crisis due to its global nature. By exploring the potential of artificial intelligence by employing the non-parametric approach of artificial neural networks, which has not yet been applied in the South African context for the probability prediction of currency crises, and comparing its prediction performance to the signals, the probit and the Markov regime switching EWS models, this thesis fills an existing information gap. This study found that of these four EWS models for predicting the probabilities of currency crises within the 24-month crisis window, the signals model performed better than the other models for the period 1993/02 – 2004/12. However, the final-outcome of the best model in probability prediction of South African currency crises is not straightforward for this period, as the artificial neural network model and Markov regime switching model performed almost as well as the signals model. During the period 2005/01 – 2017/03, the artificial neural networks model outperformed the other three models in capturing the global financial crisis of 2007/2008, specifically with regard to the evaluations of the percentage of pre-crisis periods called correctly and the percentage of tranquil periods called correctly. As the cut-off probability increases, the artificial neural networks model is the superior model and is not closely followed by the other models. The artificial neural network model also indicated a stable / tranquil economy during the period following the global financial crisis (from about 2009 – 2017), which is a true reflection of that period. The findings of this study suggest that the artificial neural network model is a powerful tool in the probability prediction of early warning signs of currency crises in South Africa.
- Full Text:
- Date Issued: 2018
- Authors: Gondoza, Gladys Nicola Fernandes
- Date: 2018
- Subjects: Financial crises -- 21st century
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/30238 , vital:30905
- Description: In a world characterised by globalisation, particularly increased financial integration and capital mobility, international economic theory stipulates that countries rather maintain a floating exchange rate system than a fixed exchange rate system in order to have less susceptibility to currency crises (Glick & Hutchison, 2011). South Africa, the economic powerhouse of Africa, is an interesting case to examine. It has a floating exchange rate and should thus be more resistant to currency crises due to market adjustment expectations that limit the build-up of pressure in its foreign exchange markets. South Africa’s foreign exchange market is characterised as volatile with recurring turbulent periods with currency crises observed in 1996, 1998, 2001 and 2008, of which the 2007/2008 global financial crisis was the worst the world had experienced since the Great Depression of the 1930s and it had a significant, negative impact on the South African economy and certainly exposed the country’s vulnerably (South African Reserve Bank, 2012). Having experienced these periods of currency crisis in South Africa and with no specific tool adequately tested and developed for the South African economy to accurately detect such an event before its occurrence, this research was an attempt to fill this gap within the economics discipline. The purpose of this thesis was to examine and make use of Early Warning System (EWS) models to ascertain which one best identifies potential early warning signs of a currency crisis in South Africa. To achieve this, the study tested two standard and commonly used EWS models, namely the Signals and probit models. Added to these approaches, two newer EWS models, namely the Markov regime switching model and the artificial neural networks model were tested. To date only two studies on EWS models for currency crises have been conducted in South Africa. Knedlik (2006) used the signals approach and Knedlik and Scheufele (2007) used the signals, probit/logit and Markov regime switching approaches. Both studies recommended that further research was needed. With this in mind, this thesis built on these studies by extending the sample period under observation from 1993/02 to 2017/03 to fully capture the probability of the global financial crisis of 2007/2008. This study separated the sample period into two parts, a first period (1993/02 – 2004/12) catering for the July 1998 and December 2001 crises and a second period (2005/01 – 2017/03) catering for the October 2008 crisis. This was done to separately observe how well the models detected early warning signs of the October 2008 crisis due to its global nature. By exploring the potential of artificial intelligence by employing the non-parametric approach of artificial neural networks, which has not yet been applied in the South African context for the probability prediction of currency crises, and comparing its prediction performance to the signals, the probit and the Markov regime switching EWS models, this thesis fills an existing information gap. This study found that of these four EWS models for predicting the probabilities of currency crises within the 24-month crisis window, the signals model performed better than the other models for the period 1993/02 – 2004/12. However, the final-outcome of the best model in probability prediction of South African currency crises is not straightforward for this period, as the artificial neural network model and Markov regime switching model performed almost as well as the signals model. During the period 2005/01 – 2017/03, the artificial neural networks model outperformed the other three models in capturing the global financial crisis of 2007/2008, specifically with regard to the evaluations of the percentage of pre-crisis periods called correctly and the percentage of tranquil periods called correctly. As the cut-off probability increases, the artificial neural networks model is the superior model and is not closely followed by the other models. The artificial neural network model also indicated a stable / tranquil economy during the period following the global financial crisis (from about 2009 – 2017), which is a true reflection of that period. The findings of this study suggest that the artificial neural network model is a powerful tool in the probability prediction of early warning signs of currency crises in South Africa.
- Full Text:
- Date Issued: 2018
The missing ingredient: rethinking the drought disaster risk reduction and climate change adaptation nexus in Chirumhanzu District, Zimbabwe
- Authors: Grey, Mashoko Stephen
- Date: 2018
- Subjects: Climatic changes -- Zimbabwe -- Chirumanzu District , Climatic changes -- Government policy -- Zimbabwe -- Chirumanzu District , Climatic changes -- Economic aspects -- Zimbabwe -- Chirumanzu District , Natural disasters -- Risk assessment -- Zimbabwe -- Chirumanzu District , Drought management -- Zimbabwe -- Chirumanzu District , Hazard mitigation -- Zimbabwe -- Chirumanzu District
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/58298 , vital:27207
- Description: Two of the main challenges facing communities and governments in developing countries are the reduction of risks of hydro-meteorological hazards and adaptation to climate change. As climate variability and change impacts are becoming more visible in the form of disasters, and are negatively affecting climate sensitive livelihoods and eroding communities' ability to fully recover, leading to increased vulnerability to subsequent climate risks. The unpredictability of current weather systems, therefore, makes it very difficult for poor governments and households to deal with adverse impacts of climate change. Furthermore, the fragmented approach to DRR and CCA with regards to practice, policy and organisational frameworks for dealing with climate risks is resulting in coordination challenges for the government departments. This study aimed to explore how local households and communities perceive and are experiencing and coping with climate change and drought, and what that means for integrating hydro-meteorological disaster risk reduction and climate change adaptation. The study was carried out in Chirumhanzu district and the methods used for data collection included: 217 household surveys; six focus group discussions; participatory learning actions methods; key informant's interviews and document review. The majority of households owned low value material assets and had low levels of livelihood capitals and this exposed them to the impacts of climate variability and successive droughts. This low adaptive capacity largely affected their ability to engage effective drought risk reduction and adaptation strategies for their livelihood activities in small-scale farming and livestock rearing. Vulnerability to climate risks was exacerbated by seasonal weather forecasts, which were deemed by some households to be unreliable, inaccurate and not easily understood, while others used of indigenous knowledge. Successive droughts affected households' access to food and cash income for other household demands. Other non-climatic factors that contributed to adverse drought impacts at the household level were an emphasis on reactive humanitarian aid approach and the poor economy in Zimbabwe. Additionally, the policy framework for dealing with climate change and drought hazards is fragmented and weak; and is housed in different government departments making it difficult to coordinate and implement. To improve climate risk management, there is need for the government to appreciate that drought risk reduction and climate change adaptation are all about reducing vulnerability. Understanding this, might assist in improving government focus on addressing the underlying causes of vulnerability and mainstreaming DRR and CCA into development processes through addressing specific and generic adaptive capacities. The thesis argues that as long as rural households are involved in climate sensitive livelihood activities and not getting meaningful intervention to diversity and/or better intensify their livelihood activities, they will continue to be vulnerable to successive climate risks. This fragmented approach to dealing with climate risks, is not yielding any successful results with regards to building resilience, risk reduction or adaptation of rural households.
- Full Text:
- Date Issued: 2018
- Authors: Grey, Mashoko Stephen
- Date: 2018
- Subjects: Climatic changes -- Zimbabwe -- Chirumanzu District , Climatic changes -- Government policy -- Zimbabwe -- Chirumanzu District , Climatic changes -- Economic aspects -- Zimbabwe -- Chirumanzu District , Natural disasters -- Risk assessment -- Zimbabwe -- Chirumanzu District , Drought management -- Zimbabwe -- Chirumanzu District , Hazard mitigation -- Zimbabwe -- Chirumanzu District
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/58298 , vital:27207
- Description: Two of the main challenges facing communities and governments in developing countries are the reduction of risks of hydro-meteorological hazards and adaptation to climate change. As climate variability and change impacts are becoming more visible in the form of disasters, and are negatively affecting climate sensitive livelihoods and eroding communities' ability to fully recover, leading to increased vulnerability to subsequent climate risks. The unpredictability of current weather systems, therefore, makes it very difficult for poor governments and households to deal with adverse impacts of climate change. Furthermore, the fragmented approach to DRR and CCA with regards to practice, policy and organisational frameworks for dealing with climate risks is resulting in coordination challenges for the government departments. This study aimed to explore how local households and communities perceive and are experiencing and coping with climate change and drought, and what that means for integrating hydro-meteorological disaster risk reduction and climate change adaptation. The study was carried out in Chirumhanzu district and the methods used for data collection included: 217 household surveys; six focus group discussions; participatory learning actions methods; key informant's interviews and document review. The majority of households owned low value material assets and had low levels of livelihood capitals and this exposed them to the impacts of climate variability and successive droughts. This low adaptive capacity largely affected their ability to engage effective drought risk reduction and adaptation strategies for their livelihood activities in small-scale farming and livestock rearing. Vulnerability to climate risks was exacerbated by seasonal weather forecasts, which were deemed by some households to be unreliable, inaccurate and not easily understood, while others used of indigenous knowledge. Successive droughts affected households' access to food and cash income for other household demands. Other non-climatic factors that contributed to adverse drought impacts at the household level were an emphasis on reactive humanitarian aid approach and the poor economy in Zimbabwe. Additionally, the policy framework for dealing with climate change and drought hazards is fragmented and weak; and is housed in different government departments making it difficult to coordinate and implement. To improve climate risk management, there is need for the government to appreciate that drought risk reduction and climate change adaptation are all about reducing vulnerability. Understanding this, might assist in improving government focus on addressing the underlying causes of vulnerability and mainstreaming DRR and CCA into development processes through addressing specific and generic adaptive capacities. The thesis argues that as long as rural households are involved in climate sensitive livelihood activities and not getting meaningful intervention to diversity and/or better intensify their livelihood activities, they will continue to be vulnerable to successive climate risks. This fragmented approach to dealing with climate risks, is not yielding any successful results with regards to building resilience, risk reduction or adaptation of rural households.
- Full Text:
- Date Issued: 2018
Modelling plant water use of the grassland and thicket biomes in the Eastern Cape, South Africa: towards an improved understanding of the impact of invasive alien plants on soil chemistry, biomass production and evapotranspiration
- Authors: Gwate, Onalenna
- Date: 2018
- Subjects: Grasslands -- South Africa -- Eastern Cape , Invasive plants -- South Africa -- Eastern Cape , Rangelands -- South Africa -- Eastern Cape , Range ecology-- South Africa -- Eastern Cape , Rangelands -- Water-supply , Rangelands -- Weed control , Evapotranspiration , Plant-water relationships
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/54800 , vital:26617
- Description: It is imperative to understand the strong coupling between the carbon capture process and water use to sustainably manage rangelands. Woody encroachment is undermining rangelands grass production. Evapotranspiration (ET) highlights the links between ecosystem carbon capture process and water use. It forms the biggest flux of the hydrological cycle after precipitation yet it is not well understood. The Grassland and the Albany Thicket (AT) biomes in the Eastern Cape, South Africa, provide an interesting space to study the dynamics in rangelands biomass production and the associated water use. Therefore, the main purpose of this study was to contribute towards management of rangelands by understanding the dynamics in rangeland grass production and water use. To achieve this aim, the impact of Acacia mearnsii, an invasive alien plant, on soil chemical properties and rangelands grass production was investigated. This was achieved by analysing the biophysical attributes of A. mearnsii as they related to grass production. Secondly, selected soil variables that could be used as a prognosis for landscape recovery or deterioration were evaluated. In addition, aboveground grass biomass was measured in areas cleared of A. mearnsii and regression equations were prepared to help model aboveground grass biomass in areas cleared of A. mearnsi. The thesis also explored dynamics in water vapour and energy fluxes in these two biomes using an eddy covariance system. Consequently, water vapour and energy fluxes were evaluated in order to understand landscape water use and energy partitioning in the landscape. The study also tested the application of Penman-Monteith equation based algorithms for estimating ET with micrometeorological techniques used for validation. Pursuant to this, the Penman- Monteith-Leuning (PML) and Penman-Monteith-Palmer (PMP) equations were applied. In addition, some effort was devoted to improving the estimates of ET from the PMP by incorporating a direct soil evaporation component. Finally, the influence of local changes in catchment characteristics on ET was explored through the application of a variant of the Budyko framework and investigating dynamics in the evaporative index as well as applying tests for trends and shifts on ET and rainfall data to detect changes in mean quaternary catchment rainfall and ET. Results revealed that A. mearnsii affected soil chemical properties and impaired grass production in rangelands. Hence, thinning of canopies provided an optimal solution for enhanced landscape water use to sequestrate carbon, provide shade, grazing, and also wood fuel. It was also shown that across sites, ET was water limited since differences between reference ET and actual ET were large. ET was largely sensitive to vapour pressure deficit and surface conductance than to net radiation, indicating that the canopies were strongly coupled with the boundary layer. Rangeland ET was successfully simulated and evaporation from the soil was the dominant flux, hence there is scope for reducing the so-called ‘unproductive’ water use. Further, it was shown that the PML was better able to simulate ET compared to the PMP model as revealed by different model evaluation metrics such as the root mean square error, absolute mean square error and the root mean square observations standard deviation ratio. The incorporation of a soil evaporation component in the PMP model improved estimates of ET as revealed by the root mean square error. The results also indicated that both the catchment parameter (w) and the evaporative index were important in highlighting the impacts of land cover change on ET. It was also shown that, despite changes in the local environment such as catchment characteristics, global forces also affected ET at a local scale. Overall, the study demonstrated that combining remote sensing and ground based observations was important to better understand rangeland grass production and water use dynamics.
- Full Text:
- Date Issued: 2018
- Authors: Gwate, Onalenna
- Date: 2018
- Subjects: Grasslands -- South Africa -- Eastern Cape , Invasive plants -- South Africa -- Eastern Cape , Rangelands -- South Africa -- Eastern Cape , Range ecology-- South Africa -- Eastern Cape , Rangelands -- Water-supply , Rangelands -- Weed control , Evapotranspiration , Plant-water relationships
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/54800 , vital:26617
- Description: It is imperative to understand the strong coupling between the carbon capture process and water use to sustainably manage rangelands. Woody encroachment is undermining rangelands grass production. Evapotranspiration (ET) highlights the links between ecosystem carbon capture process and water use. It forms the biggest flux of the hydrological cycle after precipitation yet it is not well understood. The Grassland and the Albany Thicket (AT) biomes in the Eastern Cape, South Africa, provide an interesting space to study the dynamics in rangelands biomass production and the associated water use. Therefore, the main purpose of this study was to contribute towards management of rangelands by understanding the dynamics in rangeland grass production and water use. To achieve this aim, the impact of Acacia mearnsii, an invasive alien plant, on soil chemical properties and rangelands grass production was investigated. This was achieved by analysing the biophysical attributes of A. mearnsii as they related to grass production. Secondly, selected soil variables that could be used as a prognosis for landscape recovery or deterioration were evaluated. In addition, aboveground grass biomass was measured in areas cleared of A. mearnsii and regression equations were prepared to help model aboveground grass biomass in areas cleared of A. mearnsi. The thesis also explored dynamics in water vapour and energy fluxes in these two biomes using an eddy covariance system. Consequently, water vapour and energy fluxes were evaluated in order to understand landscape water use and energy partitioning in the landscape. The study also tested the application of Penman-Monteith equation based algorithms for estimating ET with micrometeorological techniques used for validation. Pursuant to this, the Penman- Monteith-Leuning (PML) and Penman-Monteith-Palmer (PMP) equations were applied. In addition, some effort was devoted to improving the estimates of ET from the PMP by incorporating a direct soil evaporation component. Finally, the influence of local changes in catchment characteristics on ET was explored through the application of a variant of the Budyko framework and investigating dynamics in the evaporative index as well as applying tests for trends and shifts on ET and rainfall data to detect changes in mean quaternary catchment rainfall and ET. Results revealed that A. mearnsii affected soil chemical properties and impaired grass production in rangelands. Hence, thinning of canopies provided an optimal solution for enhanced landscape water use to sequestrate carbon, provide shade, grazing, and also wood fuel. It was also shown that across sites, ET was water limited since differences between reference ET and actual ET were large. ET was largely sensitive to vapour pressure deficit and surface conductance than to net radiation, indicating that the canopies were strongly coupled with the boundary layer. Rangeland ET was successfully simulated and evaporation from the soil was the dominant flux, hence there is scope for reducing the so-called ‘unproductive’ water use. Further, it was shown that the PML was better able to simulate ET compared to the PMP model as revealed by different model evaluation metrics such as the root mean square error, absolute mean square error and the root mean square observations standard deviation ratio. The incorporation of a soil evaporation component in the PMP model improved estimates of ET as revealed by the root mean square error. The results also indicated that both the catchment parameter (w) and the evaporative index were important in highlighting the impacts of land cover change on ET. It was also shown that, despite changes in the local environment such as catchment characteristics, global forces also affected ET at a local scale. Overall, the study demonstrated that combining remote sensing and ground based observations was important to better understand rangeland grass production and water use dynamics.
- Full Text:
- Date Issued: 2018
On high-altitude and high- latitude frost environments
- Authors: Hansen, Christel Dorothee
- Date: 2018
- Subjects: Frost -- Drakensberg Mountains , Frost -- Prince Edward Islands -- Marion Island , Frost -- Antarctica -- Queen Maud Land , Climatic geomorphology -- Southern Hemisphere , Permafrost -- Southern Hemisphere , Periglacial processes -- Southern Hemisphere , Frost environments -- Southern Hemisphere
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62383 , vital:28169
- Description: Frost environments occur throughout the world, with associated processes occurring across climatic zones. Climatic geomorphology proposes that climatic zones, largely derived from annual average air temperature and precipitation values, have specific landforms and processes active within that zone. This study offers unique insights into the frost environments of three locations in the Southern Hemisphere, namely the Eastern Cape Drakensberg of South Africa, sub-Antarctic Marion Island, and Dronning Maud Land of Antarctica. The Drakensberg ranges from temperate to alpine, Marion Island is hyper-maritime, and Dronning Maud Land a polar desert. Drivers and forcings on the ground frost regime are identified, as are future climatic scenarios. Altitude and latitude were identified as the most important locational drivers, while air temperature showed highest correlation with freezing events. The initiation of a freeze event correlated strongly with maximum ground temperatures. Vegetation cover was found to ameliorate frost cycles, thereby increasing ground temperatures. Dronning Maud Land of Antarctica is characterised by annual frost (permafrost), with limited seasonal thaw in summer. Thawing cycles reflected the depth of the active layer, which ranged from just under 60 cm for Robertskollen (at lowest altitude) to less than 15 cm on Slettfjell (at greatest altitude). Marion Island had the most active frost environment, exhibiting both seasonal frost, and ubiquitous shallow diurnal frost cycles. The Drakensberg were largely frost-free, with limited seasonal frost and few diurnal freeze- thaw events. Diurnal frost processes were found to be azonal, and present at all three study locations. Evidence of landforms derived from diurnal frost processes were evident in each zone. Equifinality/convergence of form was present to a degree. The presence of patterned ground, which was not wholly derived from frost processes, suggests a measure of equifinality. Furthermore, openwork block deposits, of which not all are either blockstreams nor blockfields, are not necessarily the result of frost processes. The periglacial environment is poorly defined and methods to delineate this environment, as well as other climatic zones, should include additional parameters. Delineating zones on annual (and limited) monthly averages based on predominantly temperature, is not sufficient. While concepts of climatic geomorphology may be applied in a general sense, this framework is not suited to working at smaller scales. Specifically, periglacial environments should be delineated using ground moisture, as well as air temperature. Furthermore, vegetation and snow cover are important, as are soil textural properties.
- Full Text:
- Date Issued: 2018
- Authors: Hansen, Christel Dorothee
- Date: 2018
- Subjects: Frost -- Drakensberg Mountains , Frost -- Prince Edward Islands -- Marion Island , Frost -- Antarctica -- Queen Maud Land , Climatic geomorphology -- Southern Hemisphere , Permafrost -- Southern Hemisphere , Periglacial processes -- Southern Hemisphere , Frost environments -- Southern Hemisphere
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62383 , vital:28169
- Description: Frost environments occur throughout the world, with associated processes occurring across climatic zones. Climatic geomorphology proposes that climatic zones, largely derived from annual average air temperature and precipitation values, have specific landforms and processes active within that zone. This study offers unique insights into the frost environments of three locations in the Southern Hemisphere, namely the Eastern Cape Drakensberg of South Africa, sub-Antarctic Marion Island, and Dronning Maud Land of Antarctica. The Drakensberg ranges from temperate to alpine, Marion Island is hyper-maritime, and Dronning Maud Land a polar desert. Drivers and forcings on the ground frost regime are identified, as are future climatic scenarios. Altitude and latitude were identified as the most important locational drivers, while air temperature showed highest correlation with freezing events. The initiation of a freeze event correlated strongly with maximum ground temperatures. Vegetation cover was found to ameliorate frost cycles, thereby increasing ground temperatures. Dronning Maud Land of Antarctica is characterised by annual frost (permafrost), with limited seasonal thaw in summer. Thawing cycles reflected the depth of the active layer, which ranged from just under 60 cm for Robertskollen (at lowest altitude) to less than 15 cm on Slettfjell (at greatest altitude). Marion Island had the most active frost environment, exhibiting both seasonal frost, and ubiquitous shallow diurnal frost cycles. The Drakensberg were largely frost-free, with limited seasonal frost and few diurnal freeze- thaw events. Diurnal frost processes were found to be azonal, and present at all three study locations. Evidence of landforms derived from diurnal frost processes were evident in each zone. Equifinality/convergence of form was present to a degree. The presence of patterned ground, which was not wholly derived from frost processes, suggests a measure of equifinality. Furthermore, openwork block deposits, of which not all are either blockstreams nor blockfields, are not necessarily the result of frost processes. The periglacial environment is poorly defined and methods to delineate this environment, as well as other climatic zones, should include additional parameters. Delineating zones on annual (and limited) monthly averages based on predominantly temperature, is not sufficient. While concepts of climatic geomorphology may be applied in a general sense, this framework is not suited to working at smaller scales. Specifically, periglacial environments should be delineated using ground moisture, as well as air temperature. Furthermore, vegetation and snow cover are important, as are soil textural properties.
- Full Text:
- Date Issued: 2018
“We are white”: oral tradition, documented history and molecular biology of Xhosa clans descended from non-African forebears and their expression of this ancestry through the idiom of ancestor religion
- Authors: Hayward, Janet M
- Date: 2018
- Subjects: Clans -- South Africa -- Eastern Cape , Patrilineal kinship -- South Africa -- Eastern Cape , Xhosa (African people) -- Genealogy , Oral history -- South Africa -- Eastern Cape , Genetic genealogy , Xhosa (African people) -- Rites and ceremonies , Xhosa (African people) -- Race identity
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62939 , vital:28312
- Description: Xhosa clan membership is symbolised by a clan-name (isiduko) and passed along the male line from father to son. This social indicator has a biological counterpart in Y chromosome DNA that passes through successive generations in the patriline. Both relate specifically to a distant patrilineal forebear or apical ancestor. The present study has involved the collection and documentation of oral-historical information relating to the descent of certain Cape Nguni clans from non-African forebears and (where possible) a review of documented accounts of such origins. The research has also included collection of buccal cells from male research participants and analysis of their Y chromosome DNA. This method indicates whether a man’s patrilineal forebear lived in Africa. Otherwise, it indicates the broad geographical region from which he originated, hence providing an additional, independent source of information relating to ancestry that can confirm or challenge claims made based on oral history. Ethnographic research into the performance of distinctive ancestor rituals by clan members explores the continuing relevance of foreign ancestry in the contemporary context of rural communities in the Eastern Cape, South Africa. The study heeds calls for the decolonisation of scholarship in various ways: methodologically, through transdisciplinary research; ontologically, by questioning the utility of the nature: culture and related dichotomies; and epistemologically, because instead of relying entirely on the western academic tradition, it takes account of other modes of knowledge production. In rejection of the notion that only one side of history is true, it records multiple voices – those of the powerful but also the ordinary. The study deals with race and racial identification, but confirms the superficiality of these constructed differences by offering evidence of their submergence in the unifying power of kinship and descent.
- Full Text:
- Date Issued: 2018
- Authors: Hayward, Janet M
- Date: 2018
- Subjects: Clans -- South Africa -- Eastern Cape , Patrilineal kinship -- South Africa -- Eastern Cape , Xhosa (African people) -- Genealogy , Oral history -- South Africa -- Eastern Cape , Genetic genealogy , Xhosa (African people) -- Rites and ceremonies , Xhosa (African people) -- Race identity
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62939 , vital:28312
- Description: Xhosa clan membership is symbolised by a clan-name (isiduko) and passed along the male line from father to son. This social indicator has a biological counterpart in Y chromosome DNA that passes through successive generations in the patriline. Both relate specifically to a distant patrilineal forebear or apical ancestor. The present study has involved the collection and documentation of oral-historical information relating to the descent of certain Cape Nguni clans from non-African forebears and (where possible) a review of documented accounts of such origins. The research has also included collection of buccal cells from male research participants and analysis of their Y chromosome DNA. This method indicates whether a man’s patrilineal forebear lived in Africa. Otherwise, it indicates the broad geographical region from which he originated, hence providing an additional, independent source of information relating to ancestry that can confirm or challenge claims made based on oral history. Ethnographic research into the performance of distinctive ancestor rituals by clan members explores the continuing relevance of foreign ancestry in the contemporary context of rural communities in the Eastern Cape, South Africa. The study heeds calls for the decolonisation of scholarship in various ways: methodologically, through transdisciplinary research; ontologically, by questioning the utility of the nature: culture and related dichotomies; and epistemologically, because instead of relying entirely on the western academic tradition, it takes account of other modes of knowledge production. In rejection of the notion that only one side of history is true, it records multiple voices – those of the powerful but also the ordinary. The study deals with race and racial identification, but confirms the superficiality of these constructed differences by offering evidence of their submergence in the unifying power of kinship and descent.
- Full Text:
- Date Issued: 2018
Key considerations for novel aptamer generation and aptasensor platform design: a case study on human α-thrombin and histamine as sensor targets
- Authors: Ho, Lance St John
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63534 , vital:28432
- Description: Expected release date-April 2020
- Full Text:
- Date Issued: 2018
- Authors: Ho, Lance St John
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63534 , vital:28432
- Description: Expected release date-April 2020
- Full Text:
- Date Issued: 2018
The knowledge commons, pan-Africanism, and epistemic inequality: a study of CODESRIA
- Authors: Hoffmann, Nimi
- Date: 2018
- Subjects: Pan-Africanism , Codesria , Equality -- Africa , Social justice -- Africa , Feminist criticism -- Africa , Sex discrimination against women -- Africa , Postcolonialism -- Africa , Women intellectuals -- Africa , Academic freedom -- Africa , Africans -- Intellectual life
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60303 , vital:27764
- Description: This study is about the Council for the Development of Social Science Research in Africa (CODESRIA). Conceived in 1964 and formalised in 1973, CODESRIA is the longest-standing pan-African intellectual organisation on the continent. It was established with the primary objective of fostering greater collaboration between African scholars, and has acquired a reputation for challenging the marginalisation and fragmentation of African scholarship. However, there has been no systematic account of this important organisation. This study aims to cast light on this organisation and its intellectual contributions in the post-independence period. It examines CODESRIA as a knowledge commons - a community of scholars that creates, manages and shares intellectual goods outside of the state and the market. It asks: what factors have shaped CODESRIA as a pan-African knowledge commons in the context of epistemic inequality? As a way of answering this question, it examines three key debates: the different meanings of pan-Africanism in CODESRIA, CODESRIA’s defence of the academic project during structural adjustment, and African feminists’ struggles to change CODESRIA. These debates exemplify the ways in which different generations of African scholars in the post - independence period have sought to make sense of and respond to the problems of inequality - both outside of CODESRIA and within CODESRIA. This thesis approaches CODESRIA as a case study. It combines a document analysis with semi-structured interviews to construct and critique key intellectuals' understandings of the organisational design and practices of CODESRIA, the nature of its community and intellectual work. It supplements this with a descriptive analysis of CODESRIA’s bibliometric and administrative data. The study finds that CODESRIA has forged a distinctive form of pan-Africanism that offers a non-governmental and intellectual alternative to state-centric and bureaucratic forms of pan-Africanism. As a powerful counter-narrative to prevailing ideas of African intellectual inferiority, pan-Africanism has been an important motivational source for establishing and cohering CODESRIA’s community. Although its pan-African organisational form has been complicated by the enduring influence of colonial frameworks and limited by the the material and institutional weaknesses of African universities, it has nevertheless acted as a mode of collective enquiry for troubling and expanding the colonial conception of Africa. This study further finds that structural adjustment fundamentally reshaped the intellectual and material underpinnings of CODESRIA with complex and ambiguous results. In the short term, CODESRIA’s analysis of structural adjustment led to considerable intellectual and organisational innovation so that it grew in size and influence. In the long-run, however, structural adjustment eroded the public universities upon which CODESRIA relied. This eroded the mechanisms to maintain its intellectual vigour and democratic character, and increased CODESRIA’s dependency on donors. The study also finds that the struggles of feminist scholars to change unequal gender norms in CODESRIA have been a source of significant intellectual and organisational renewal. Contestations over gender inequality within CODESRIA have given rise to a distinctive form of African feminism, which emphasises the historicity of gender relations in ways that reject essentialist and teleological accounts of African societies. Feminist struggles have also given rise to new standards of scholastic excellence that mark a meaningful departure from the skewed standards introduced under colonial rule. Nevertheless, the persistent minoritisation of female scholars in CODESRIA has significantly limited their capacity to effect institutional change, such that the ghettoization of feminist scholarship and the hollowing out of feminist discourses on gender remains a constant threat. The central argument of this study is that inequality can motivate marginalised members to engage in the collective action required to create and reshape knowledge commons, but it can also constrain their collective action and threaten the long-term sustainability of the commons. The collective agency of marginalised individuals is therefore central to the flourishing of knowledge commons. Second, knowledge commons are intimately dependent on public goods, such as universities. Public goods are plausibly the source, and therefore the limit, of knowledge commons’ capacity to flourish over the long-term. As a consequence, it is likely that knowledge commons are complements to public goods provision, rather than substitutes. Rethinking the knowledge commons in terms of the predicaments of African intellectual communities, I contend, provides new ways of understanding the possibilities, constraints and contradictions of knowledge commons in an unequal world. This study contributes to the empirical literature on African intellectual communities. In particular, it provides critical knowledge on a scholarly community that has not only endured, but has managed to thrive in a context of profound economic and political instability. This provides an indication of the institutions, practices, and intellectual resources that are required to ensure that African knowledge systems flourish over the long-term. This study also makes a theoretical contribution to the literature on knowledge commons, which are largely theorised using examples from the global North. It shows how reconceptualising knowledge commons in terms of inequality opens up new lines of empirical investigation. Building on existing commons research, it develops a methodological framework for comparative research on southern knowledge commons, which may also be of use for investigating commons in general.
- Full Text:
- Date Issued: 2018
- Authors: Hoffmann, Nimi
- Date: 2018
- Subjects: Pan-Africanism , Codesria , Equality -- Africa , Social justice -- Africa , Feminist criticism -- Africa , Sex discrimination against women -- Africa , Postcolonialism -- Africa , Women intellectuals -- Africa , Academic freedom -- Africa , Africans -- Intellectual life
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60303 , vital:27764
- Description: This study is about the Council for the Development of Social Science Research in Africa (CODESRIA). Conceived in 1964 and formalised in 1973, CODESRIA is the longest-standing pan-African intellectual organisation on the continent. It was established with the primary objective of fostering greater collaboration between African scholars, and has acquired a reputation for challenging the marginalisation and fragmentation of African scholarship. However, there has been no systematic account of this important organisation. This study aims to cast light on this organisation and its intellectual contributions in the post-independence period. It examines CODESRIA as a knowledge commons - a community of scholars that creates, manages and shares intellectual goods outside of the state and the market. It asks: what factors have shaped CODESRIA as a pan-African knowledge commons in the context of epistemic inequality? As a way of answering this question, it examines three key debates: the different meanings of pan-Africanism in CODESRIA, CODESRIA’s defence of the academic project during structural adjustment, and African feminists’ struggles to change CODESRIA. These debates exemplify the ways in which different generations of African scholars in the post - independence period have sought to make sense of and respond to the problems of inequality - both outside of CODESRIA and within CODESRIA. This thesis approaches CODESRIA as a case study. It combines a document analysis with semi-structured interviews to construct and critique key intellectuals' understandings of the organisational design and practices of CODESRIA, the nature of its community and intellectual work. It supplements this with a descriptive analysis of CODESRIA’s bibliometric and administrative data. The study finds that CODESRIA has forged a distinctive form of pan-Africanism that offers a non-governmental and intellectual alternative to state-centric and bureaucratic forms of pan-Africanism. As a powerful counter-narrative to prevailing ideas of African intellectual inferiority, pan-Africanism has been an important motivational source for establishing and cohering CODESRIA’s community. Although its pan-African organisational form has been complicated by the enduring influence of colonial frameworks and limited by the the material and institutional weaknesses of African universities, it has nevertheless acted as a mode of collective enquiry for troubling and expanding the colonial conception of Africa. This study further finds that structural adjustment fundamentally reshaped the intellectual and material underpinnings of CODESRIA with complex and ambiguous results. In the short term, CODESRIA’s analysis of structural adjustment led to considerable intellectual and organisational innovation so that it grew in size and influence. In the long-run, however, structural adjustment eroded the public universities upon which CODESRIA relied. This eroded the mechanisms to maintain its intellectual vigour and democratic character, and increased CODESRIA’s dependency on donors. The study also finds that the struggles of feminist scholars to change unequal gender norms in CODESRIA have been a source of significant intellectual and organisational renewal. Contestations over gender inequality within CODESRIA have given rise to a distinctive form of African feminism, which emphasises the historicity of gender relations in ways that reject essentialist and teleological accounts of African societies. Feminist struggles have also given rise to new standards of scholastic excellence that mark a meaningful departure from the skewed standards introduced under colonial rule. Nevertheless, the persistent minoritisation of female scholars in CODESRIA has significantly limited their capacity to effect institutional change, such that the ghettoization of feminist scholarship and the hollowing out of feminist discourses on gender remains a constant threat. The central argument of this study is that inequality can motivate marginalised members to engage in the collective action required to create and reshape knowledge commons, but it can also constrain their collective action and threaten the long-term sustainability of the commons. The collective agency of marginalised individuals is therefore central to the flourishing of knowledge commons. Second, knowledge commons are intimately dependent on public goods, such as universities. Public goods are plausibly the source, and therefore the limit, of knowledge commons’ capacity to flourish over the long-term. As a consequence, it is likely that knowledge commons are complements to public goods provision, rather than substitutes. Rethinking the knowledge commons in terms of the predicaments of African intellectual communities, I contend, provides new ways of understanding the possibilities, constraints and contradictions of knowledge commons in an unequal world. This study contributes to the empirical literature on African intellectual communities. In particular, it provides critical knowledge on a scholarly community that has not only endured, but has managed to thrive in a context of profound economic and political instability. This provides an indication of the institutions, practices, and intellectual resources that are required to ensure that African knowledge systems flourish over the long-term. This study also makes a theoretical contribution to the literature on knowledge commons, which are largely theorised using examples from the global North. It shows how reconceptualising knowledge commons in terms of inequality opens up new lines of empirical investigation. Building on existing commons research, it develops a methodological framework for comparative research on southern knowledge commons, which may also be of use for investigating commons in general.
- Full Text:
- Date Issued: 2018
Naming in Germany in the 20th century: a sociological study of naming in times of social change, with a focus on statistical problems in empirical onomastic research
- Authors: Huschka, Denis
- Date: 2018
- Subjects: Onomastics , Names, Personal -- Germany , Names, German -- Etymology , Names, German -- Social aspects , German language -- Etymology -- Names , German Socio Economic Panel Study (SOEP)
- Language: German , English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63054 , vital:28359
- Description: In this thesis names are used as social indicators to observe social change in Germany in the 20th century. The German Socio Economic Panel Study (SOEP) offers the rare opportunity to analyse representative survey data of first names. The empirical results of the analyses in this thesis offer a comprehensive picture on how the naming reality in Germany looks like and how naming changed in a period of about 100 years. Names can serve as social indicators. It is demonstrated how chosen names mirror social change in the German society: Name choices have become less traditional and more individual. Over time names from other world regions and cultures have found their way into the German culture. There are more different names in use today than 100 years ago and the names have become more evenly distributed over the population. Today children are less likely to share their names with many of their peers. These are signs of an increasingly individualised, transnationalised modern behaviour of the people in contemporary Germany. Almost all of these developments started earlier and tend to be more pronounced for girl’s names. The secularisation of the German society - however - did not cause substantial changes in naming over time. Christian names still are used to the greatest extent, but – possibly – not because they are regarded as being of Christian origin. The analyses of the social-structural influences on naming touch on some effects of education and status. The analyses of differences in naming between the two German states during the time of division adds some evidence to the real-life experience that naming in the communist East Germany was much more oriented towards the free western hemisphere – a kind of silent protest. Obviously naming was a possibility to distance oneself from an un-loved regime. On a methodological level referring to onomastics, the so-called „Large Number of are Events-Zone (LNRE)“, a feature of the distribution of names that has mostly been handled inappropriately up to now, is discussed with respect to its effects on name statistics when using samples. An alternative approach is proposed for the appropriate handling of this feature. , In der vorliegenden Arbeit werden Vornamen als soziale Indikatoren benutzt, um gesellschaftlichen Wandel im 20. Jahrhundert zu beschreiben. Das Soziooekonomische Panel (SOEP) bietet die seltene Möglichkeit, Umfragedaten über die Vornamen der Deutschen repräsentativ auszuwerten. Die empirischen Ergebnisse der vorliegenden Arbeit bieten einen umfassenden Einblick in die deutsche Vornamensrealität und über die Entwicklungen der Namensvergabe in 100 Jahren. Namen sind soziale Indikatoren. Es wird aufgezeigt, wie die Namensgebung den sozialen Wandel in der deutschen Gesellschaft spiegelt: Namenwahlen weisen über die Zeit weniger traditionelle Bezüge auf, sie wurden individueller. Namen aus anderen Kulturen und Ländern fanden Eingang in die deutsche Kultur. Es werden mehr verschiedene Namen benutzt als vor 100 Jahren und die typischerweise hoch konzentrierten Verteilungen der Vornamen stellen sich über die Zeit etwas weniger konzentriert dar. Heute geborene Kinder teilen ihre Namen mit anteilig weniger anderen Kindern ihrer Kohorte. Dies sind Anzeichen für eine individualisierte, transnational orientierte moderne Gesellschaft. Fast alle dieser Entwicklungen sind für Mädchennamen früher und in deutlicherem Maße zu beobachten. Die Säkularisierung der deutschen Gesellschaft hat hingegen wenig Einfluss auf die Vornamenswahlen genommen. Nach wie vor werden vor allem christliche Namen vergeben, auch wenn der christliche Bezug unter Umständen nicht mehr der maßgebliche Grund für die Auswahl ist. Die Analyse der sozialstrukturellen Einflüsse auf Namenswahlen bestätigt einige Effekte von Bildung und Status der Mütter. Die Analyse der Unterschiede in der Namensgebung der beiden deutschen Staaten während der 40 jährigen Teilung zeigt, dass der lebensweltliche Eindruck einer zunehmenden West-Orientierung der Namenswahlen ostdeutscher Eltern nicht trügt. Offenbar waren westliche Namen eine Möglichkeit, sich vom ungeliebten Regime zu distanzieren. Auf einer statistisch-methodischen Ebene wird eine bislang in der empirischen Onomastik unrichtig gehandhabte Besonderheit von Vornamensverteilungen – die Large Number of Rare Events-Zone (LNRE) – diskutiert und Lösungsvorschläge für den statistisch korrekten Umgang mit dieser Besonderheit in Gruppenvergleichen auf der Basis von Stichproben vorgelegt.
- Full Text:
- Date Issued: 2018
- Authors: Huschka, Denis
- Date: 2018
- Subjects: Onomastics , Names, Personal -- Germany , Names, German -- Etymology , Names, German -- Social aspects , German language -- Etymology -- Names , German Socio Economic Panel Study (SOEP)
- Language: German , English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/63054 , vital:28359
- Description: In this thesis names are used as social indicators to observe social change in Germany in the 20th century. The German Socio Economic Panel Study (SOEP) offers the rare opportunity to analyse representative survey data of first names. The empirical results of the analyses in this thesis offer a comprehensive picture on how the naming reality in Germany looks like and how naming changed in a period of about 100 years. Names can serve as social indicators. It is demonstrated how chosen names mirror social change in the German society: Name choices have become less traditional and more individual. Over time names from other world regions and cultures have found their way into the German culture. There are more different names in use today than 100 years ago and the names have become more evenly distributed over the population. Today children are less likely to share their names with many of their peers. These are signs of an increasingly individualised, transnationalised modern behaviour of the people in contemporary Germany. Almost all of these developments started earlier and tend to be more pronounced for girl’s names. The secularisation of the German society - however - did not cause substantial changes in naming over time. Christian names still are used to the greatest extent, but – possibly – not because they are regarded as being of Christian origin. The analyses of the social-structural influences on naming touch on some effects of education and status. The analyses of differences in naming between the two German states during the time of division adds some evidence to the real-life experience that naming in the communist East Germany was much more oriented towards the free western hemisphere – a kind of silent protest. Obviously naming was a possibility to distance oneself from an un-loved regime. On a methodological level referring to onomastics, the so-called „Large Number of are Events-Zone (LNRE)“, a feature of the distribution of names that has mostly been handled inappropriately up to now, is discussed with respect to its effects on name statistics when using samples. An alternative approach is proposed for the appropriate handling of this feature. , In der vorliegenden Arbeit werden Vornamen als soziale Indikatoren benutzt, um gesellschaftlichen Wandel im 20. Jahrhundert zu beschreiben. Das Soziooekonomische Panel (SOEP) bietet die seltene Möglichkeit, Umfragedaten über die Vornamen der Deutschen repräsentativ auszuwerten. Die empirischen Ergebnisse der vorliegenden Arbeit bieten einen umfassenden Einblick in die deutsche Vornamensrealität und über die Entwicklungen der Namensvergabe in 100 Jahren. Namen sind soziale Indikatoren. Es wird aufgezeigt, wie die Namensgebung den sozialen Wandel in der deutschen Gesellschaft spiegelt: Namenwahlen weisen über die Zeit weniger traditionelle Bezüge auf, sie wurden individueller. Namen aus anderen Kulturen und Ländern fanden Eingang in die deutsche Kultur. Es werden mehr verschiedene Namen benutzt als vor 100 Jahren und die typischerweise hoch konzentrierten Verteilungen der Vornamen stellen sich über die Zeit etwas weniger konzentriert dar. Heute geborene Kinder teilen ihre Namen mit anteilig weniger anderen Kindern ihrer Kohorte. Dies sind Anzeichen für eine individualisierte, transnational orientierte moderne Gesellschaft. Fast alle dieser Entwicklungen sind für Mädchennamen früher und in deutlicherem Maße zu beobachten. Die Säkularisierung der deutschen Gesellschaft hat hingegen wenig Einfluss auf die Vornamenswahlen genommen. Nach wie vor werden vor allem christliche Namen vergeben, auch wenn der christliche Bezug unter Umständen nicht mehr der maßgebliche Grund für die Auswahl ist. Die Analyse der sozialstrukturellen Einflüsse auf Namenswahlen bestätigt einige Effekte von Bildung und Status der Mütter. Die Analyse der Unterschiede in der Namensgebung der beiden deutschen Staaten während der 40 jährigen Teilung zeigt, dass der lebensweltliche Eindruck einer zunehmenden West-Orientierung der Namenswahlen ostdeutscher Eltern nicht trügt. Offenbar waren westliche Namen eine Möglichkeit, sich vom ungeliebten Regime zu distanzieren. Auf einer statistisch-methodischen Ebene wird eine bislang in der empirischen Onomastik unrichtig gehandhabte Besonderheit von Vornamensverteilungen – die Large Number of Rare Events-Zone (LNRE) – diskutiert und Lösungsvorschläge für den statistisch korrekten Umgang mit dieser Besonderheit in Gruppenvergleichen auf der Basis von Stichproben vorgelegt.
- Full Text:
- Date Issued: 2018
Advanced high speed data and clock transmission over optical fibre for square kilometre telescope array
- Authors: Isoe, George Mosoti
- Date: 2018
- Subjects: Very large array telescopes -- South Africa , Semiconductor lasers Optical communications Optical amplifiers
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/30375 , vital:30935
- Description: There is an ever present need from Internet users for more bandwidth. This is manifested by continuous increase in bandwidth demanding applications such as 5G wireless, new end user consumer links like thunderbolt, video conferencing, high definition video-on-demand transmitted over the Internet and massive data transfers required with and within data centres for backup, storage and data processing in cloud computing. Fibre optic communications technologies are playing a pivotal role in communication, being a major enabling technology in our increasingly Internet-centric society. As network services continue to become more dynamic and diverse, Internet service providers are faced with a challenge of cost reduction in the transmission network, power and spectral efficiency as well as scalability of the optical network infrastructure to support incremental expansions and virtual machines. Intelligent design of terrestrial optical networks to allow for simultaneous signal transmission through shared network infrastructure, and the use of low cost, power efficient, high bandwidth transmitters such as vertical surface emitting lasers (VCSELs) as well as exploitation of spectral efficient in-complex advanced modulation formats is a viable approach to this situation. In this study, techniques for spectral efficiency upgrade and simultaneous transmission of data signal, reference frequency (RF) clock signal and pulse-per-second (PPS) over shared infrastructure have experimentally been optimized in a laboratory environment for adoption in next-generation telescope array networks such as the Square Kilometre Array (SKA), time keeping systems such as banking systems, Coordinated Universal Time(UTC) timing and Global Positioning Systems (GPS), as well as high capacity spectral efficient short reach optical fibre networks such as data centres. This work starts by experimentally optimizing VCSEL technology for simultaneous transmission of 10 Gbps data and 1.712 GHz RF clock signal over a single G. 655 optical fibre of length 24.75 Km at different channel spacing and different propagation direction for implementation in a cost effective next-generation telescope array network. The wavelength tuneability property of VCSEL transmitters allows for wavelength adjustment, a key requirement for simultaneous data and RF clock signal transmission over a single optical fibre. A receiver sensitivity of -19.19 dBm was experimentally achieved at back-to-back analysis. A 24.75 Km of simultaneous data and RF clock signal transmission performed at 0.4 nm channel spacing introduced a transmission penalty of 1.07 dB and 1.63 dB for counter and co-propagation scheme respectively. This work mainly utilized direct modulation and direct detection using a positive intrinsic negative (PIN) due to its simplicity and cost effectiveness. A novel modulation technique for simultaneous data and polarization-based pulse-per-second timing clock signal transmission using a single VCSEL carrier is experimentally demonstrated. Two signal types, a directly modulated 10 Gbps data signal and a polarization-based pulse per second (PPS) clock signal are modulated onto a single mode 10 GHz bandwidth VCSEL carrier at 1310 nm. Spectral efficiency is maximized by exploiting the inherent orthogonal polarization switching of the xiv VCSEL with changing bias in transmission of the PPS signal. A 10 Gbps VCSEL transmission with PPS over 11 Km of G.652 fibre introduced a transmission penalty of 0.52 dB. The contribution of PPS clock signal to this penalty was found to be 0.08 dB. A technique for simultaneous directly modulated data and phase modulated reference clock signal transmission over a signal channel in wavelength division multiplexing (WDM) solutions is experimentally demonstrated. This is to prepare solutions to the ever-increasing demand over gigabit/s, terabit/s and gigahertz capacities in WDM-based terrestrial optical fibre transmission systems such as telescope array networks. a total capacity of 30 Gbps (310 Gbps) data and 12 GHz ( 4 3 GHz) reference clock signal are multiplexed at a channel spacing of 100 GHz and simultaneously transmitted over a single mode G.655 fibre of length 24.73 Km. The recovery of the phase modulated RF clock signal using a differential delay line interferometry technique is experimentally demonstrated. A 625 Gbps (2525 Gbps) DWDM data transmission system is further implemented in simulation by multiplexing 25 channels at 25 Gbps per channel using 50 GHz channel spacing. A four level pulse amplitude modulation (4-PAM) data modulation format employing VCSELs is experimentally demonstrated for adoption in high bitrate networks such as big data science projects and data centre networks. 4-PAM offers a good trade-off between complexity, efficiency, reach, and sensitivity. A software defined digital signal processing (DSP) receiver is designed and implemented in MATLAB to recover the transmitted 4-PAM data signal cost effectively without the necessity of costly receiver hardware. A novel technique for maximizing carrier spectral efficiency through simultaneous 20 Gbps 4-PAM data and phase modulated 2 GHz RF clock signal transmission on a single mode 10 GHz bandwidth VCSEL carrier at 1310 nm is experimentally demonstrated for the first time to the best of our knowledge. Data transmission and clock stability performance of the designed high spectral efficient VCSEL-based link network is evaluated through BER curve plots, phase noise measurements and Allan variance analysis respectively. VCSEL-based Raman amplification is experimentally demonstrated as a viable approach for RF clock signal distribution in extended reach astronomical telescope array networks and other extended reach terrestrial optical fibre network application. This is achieved by adopting two pumping techniques namely forward pumping and backward pumping. A maximum on off gain of 5.7 dB and 1.5 dB was experimentally attained for forward pumping and backward pumping at 24 dBm pump power respectively, while a maximum 100.8 Km fibre transmission achieved experimentally. In summary, this study has successfully demonstrated in-complex, spectral efficient, low cost and power efficient simultaneous data signal, reference frequency (RF) clock signal and pulse-per-second (PPS) transmission techniques over shared network infrastructure. Simultaneous transmission of data, RF clock and PPS timing signal is relevant in nextgeneration telescope array networks such as the Square Kilometre Array (SKA), time keeping systems such as banking systems, Coordinated Universal Time (UTC) timing and Global Positioning Systems (GPS), as well as high capacity spectral efficient short reach optical fibre networks such as data centres.
- Full Text:
- Date Issued: 2018
- Authors: Isoe, George Mosoti
- Date: 2018
- Subjects: Very large array telescopes -- South Africa , Semiconductor lasers Optical communications Optical amplifiers
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/30375 , vital:30935
- Description: There is an ever present need from Internet users for more bandwidth. This is manifested by continuous increase in bandwidth demanding applications such as 5G wireless, new end user consumer links like thunderbolt, video conferencing, high definition video-on-demand transmitted over the Internet and massive data transfers required with and within data centres for backup, storage and data processing in cloud computing. Fibre optic communications technologies are playing a pivotal role in communication, being a major enabling technology in our increasingly Internet-centric society. As network services continue to become more dynamic and diverse, Internet service providers are faced with a challenge of cost reduction in the transmission network, power and spectral efficiency as well as scalability of the optical network infrastructure to support incremental expansions and virtual machines. Intelligent design of terrestrial optical networks to allow for simultaneous signal transmission through shared network infrastructure, and the use of low cost, power efficient, high bandwidth transmitters such as vertical surface emitting lasers (VCSELs) as well as exploitation of spectral efficient in-complex advanced modulation formats is a viable approach to this situation. In this study, techniques for spectral efficiency upgrade and simultaneous transmission of data signal, reference frequency (RF) clock signal and pulse-per-second (PPS) over shared infrastructure have experimentally been optimized in a laboratory environment for adoption in next-generation telescope array networks such as the Square Kilometre Array (SKA), time keeping systems such as banking systems, Coordinated Universal Time(UTC) timing and Global Positioning Systems (GPS), as well as high capacity spectral efficient short reach optical fibre networks such as data centres. This work starts by experimentally optimizing VCSEL technology for simultaneous transmission of 10 Gbps data and 1.712 GHz RF clock signal over a single G. 655 optical fibre of length 24.75 Km at different channel spacing and different propagation direction for implementation in a cost effective next-generation telescope array network. The wavelength tuneability property of VCSEL transmitters allows for wavelength adjustment, a key requirement for simultaneous data and RF clock signal transmission over a single optical fibre. A receiver sensitivity of -19.19 dBm was experimentally achieved at back-to-back analysis. A 24.75 Km of simultaneous data and RF clock signal transmission performed at 0.4 nm channel spacing introduced a transmission penalty of 1.07 dB and 1.63 dB for counter and co-propagation scheme respectively. This work mainly utilized direct modulation and direct detection using a positive intrinsic negative (PIN) due to its simplicity and cost effectiveness. A novel modulation technique for simultaneous data and polarization-based pulse-per-second timing clock signal transmission using a single VCSEL carrier is experimentally demonstrated. Two signal types, a directly modulated 10 Gbps data signal and a polarization-based pulse per second (PPS) clock signal are modulated onto a single mode 10 GHz bandwidth VCSEL carrier at 1310 nm. Spectral efficiency is maximized by exploiting the inherent orthogonal polarization switching of the xiv VCSEL with changing bias in transmission of the PPS signal. A 10 Gbps VCSEL transmission with PPS over 11 Km of G.652 fibre introduced a transmission penalty of 0.52 dB. The contribution of PPS clock signal to this penalty was found to be 0.08 dB. A technique for simultaneous directly modulated data and phase modulated reference clock signal transmission over a signal channel in wavelength division multiplexing (WDM) solutions is experimentally demonstrated. This is to prepare solutions to the ever-increasing demand over gigabit/s, terabit/s and gigahertz capacities in WDM-based terrestrial optical fibre transmission systems such as telescope array networks. a total capacity of 30 Gbps (310 Gbps) data and 12 GHz ( 4 3 GHz) reference clock signal are multiplexed at a channel spacing of 100 GHz and simultaneously transmitted over a single mode G.655 fibre of length 24.73 Km. The recovery of the phase modulated RF clock signal using a differential delay line interferometry technique is experimentally demonstrated. A 625 Gbps (2525 Gbps) DWDM data transmission system is further implemented in simulation by multiplexing 25 channels at 25 Gbps per channel using 50 GHz channel spacing. A four level pulse amplitude modulation (4-PAM) data modulation format employing VCSELs is experimentally demonstrated for adoption in high bitrate networks such as big data science projects and data centre networks. 4-PAM offers a good trade-off between complexity, efficiency, reach, and sensitivity. A software defined digital signal processing (DSP) receiver is designed and implemented in MATLAB to recover the transmitted 4-PAM data signal cost effectively without the necessity of costly receiver hardware. A novel technique for maximizing carrier spectral efficiency through simultaneous 20 Gbps 4-PAM data and phase modulated 2 GHz RF clock signal transmission on a single mode 10 GHz bandwidth VCSEL carrier at 1310 nm is experimentally demonstrated for the first time to the best of our knowledge. Data transmission and clock stability performance of the designed high spectral efficient VCSEL-based link network is evaluated through BER curve plots, phase noise measurements and Allan variance analysis respectively. VCSEL-based Raman amplification is experimentally demonstrated as a viable approach for RF clock signal distribution in extended reach astronomical telescope array networks and other extended reach terrestrial optical fibre network application. This is achieved by adopting two pumping techniques namely forward pumping and backward pumping. A maximum on off gain of 5.7 dB and 1.5 dB was experimentally attained for forward pumping and backward pumping at 24 dBm pump power respectively, while a maximum 100.8 Km fibre transmission achieved experimentally. In summary, this study has successfully demonstrated in-complex, spectral efficient, low cost and power efficient simultaneous data signal, reference frequency (RF) clock signal and pulse-per-second (PPS) transmission techniques over shared network infrastructure. Simultaneous transmission of data, RF clock and PPS timing signal is relevant in nextgeneration telescope array networks such as the Square Kilometre Array (SKA), time keeping systems such as banking systems, Coordinated Universal Time (UTC) timing and Global Positioning Systems (GPS), as well as high capacity spectral efficient short reach optical fibre networks such as data centres.
- Full Text:
- Date Issued: 2018
Energy use patterns and trends: the impact of energy policy in South African low-income households
- Israel-Akinbo, Sylvia Olawumi
- Authors: Israel-Akinbo, Sylvia Olawumi
- Date: 2018
- Subjects: Energy policy -- Social aspects -- South Africa , Energy security -- South Africa , Households -- Economic aspects -- South Africa , Poor -- Energy assistance -- South Africa , Poor -- South Africa , University of Cape Town. National Income Dynamics Study , Free Basic Electricity Policy (South Africa) , Income and Expenditure Survey (South Africa)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62264 , vital:28148
- Description: Energy poverty is a growing concern especially amongst low-income populations in developing countries. The transition to modern energy carriers is associated with welfare improvement and it is considered as an important developmental goal to achieve, in order to eradicate energy poverty. As such, the South African government has made energy poverty an issue of policy focus. Literature abounds with different measures of energy poverty; energy programmes and policies are also aimed at improving the welfare of the low-income households in terms of basic services such as electricity. As a point of entry into this study, this thesis explored energy use patterns and trends in low-income South African households. The research objectives addressed in the study included investigating the extent of energy poverty through a multidimensional energy poverty index, examining the extent to which the 'energy ladder' and 'energy stacking' models explains energy transition patterns and to examining whether the Free Basic Electricity Policy has impacted on energy choices and energy poverty. In order to contribute to energy poverty and energy policy discussion in South Africa, this study has investigated the dimensions of energy poverty amongst low-income South African households from these three different perspectives (objectives). A positivist approach, by using a quantitative method was used to underpin the study. The study utilised secondary data, which were from the National Income Dynamics Survey and Income and Expenditure Survey. The former was used for the analysis of the multidimensional energy poverty index and energy transition patterns whilst the latter was used for the analysis of the impact of the Free Basic Electricity Policy. The four waves of the National Income Dynamics Survey, with 2008 as the base year and the 2010/2011 version of the Income and Expenditure Survey were used whilst the data were processed through the quantitative software package, STATA version 12. The data were then analysed using the multidimensional energy poverty framework by Nussbaumer et al. (2011) and econometric models, which best fit the objectives. The result of the panel analysis, which assesses the multidimensional energy poverty for low-income households in South Africa showed that low-income households in both urban and rural areas are in a moderate state of energy poverty but different levels. However, the cross-sectional analysis revealed that the percentage of low-income households that are energy poor is reducing for the rural households but increasing for their urban counterparts from 2008 to 2014. The panel and cross-sectional results of the contribution of the energy dimensions in multidimensional energy poverty shows that the low-income households are especially energy poor in terms of heating fuel. The findings from the econometric estimates partly confirmed an energy ladder behaviour for the energy choice for cooking. An energy stacking behaviour was confirmed for the low- income households for these energy services - heating and lighting. Moreover, it was found that with respect to cooking and heating, low-income households living in a modern dwelling, having a small household size and residing in an urban area are less likely to use transitional or traditional energy carriers but most likely to use modern energy carriers. In addition, low-income households are more likely to use modern energy carriers for their cooking and heating in 2010, 2012 and 2014 than in 2008. For lighting energy service, low- income households living in a modern dwelling in an urban settlement are most likely to use modern energy carriers for lighting and less likely to use transitional energy carriers or candles. Only in 2014 were low-income households more likely to use modern energy carriers for lighting than in 2008. The results further showed that modern energy carriers have the highest probability of being preferred for lighting followed by cooking and lastly heating. Also emerging from the findings are that more urban low-income households are receiving the Free Basic Electricity (FBE) grant than their counterparts in the rural areas. The probability of low-income households owning entertainment/education appliance and food preserving appliance is positively influenced by access to Free Basic Electricity. The low- income households living in an urban settlement and in a modern type of dwelling supported this result. However, household size does not seems to support this result should it grow larger.
- Full Text:
- Date Issued: 2018
- Authors: Israel-Akinbo, Sylvia Olawumi
- Date: 2018
- Subjects: Energy policy -- Social aspects -- South Africa , Energy security -- South Africa , Households -- Economic aspects -- South Africa , Poor -- Energy assistance -- South Africa , Poor -- South Africa , University of Cape Town. National Income Dynamics Study , Free Basic Electricity Policy (South Africa) , Income and Expenditure Survey (South Africa)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62264 , vital:28148
- Description: Energy poverty is a growing concern especially amongst low-income populations in developing countries. The transition to modern energy carriers is associated with welfare improvement and it is considered as an important developmental goal to achieve, in order to eradicate energy poverty. As such, the South African government has made energy poverty an issue of policy focus. Literature abounds with different measures of energy poverty; energy programmes and policies are also aimed at improving the welfare of the low-income households in terms of basic services such as electricity. As a point of entry into this study, this thesis explored energy use patterns and trends in low-income South African households. The research objectives addressed in the study included investigating the extent of energy poverty through a multidimensional energy poverty index, examining the extent to which the 'energy ladder' and 'energy stacking' models explains energy transition patterns and to examining whether the Free Basic Electricity Policy has impacted on energy choices and energy poverty. In order to contribute to energy poverty and energy policy discussion in South Africa, this study has investigated the dimensions of energy poverty amongst low-income South African households from these three different perspectives (objectives). A positivist approach, by using a quantitative method was used to underpin the study. The study utilised secondary data, which were from the National Income Dynamics Survey and Income and Expenditure Survey. The former was used for the analysis of the multidimensional energy poverty index and energy transition patterns whilst the latter was used for the analysis of the impact of the Free Basic Electricity Policy. The four waves of the National Income Dynamics Survey, with 2008 as the base year and the 2010/2011 version of the Income and Expenditure Survey were used whilst the data were processed through the quantitative software package, STATA version 12. The data were then analysed using the multidimensional energy poverty framework by Nussbaumer et al. (2011) and econometric models, which best fit the objectives. The result of the panel analysis, which assesses the multidimensional energy poverty for low-income households in South Africa showed that low-income households in both urban and rural areas are in a moderate state of energy poverty but different levels. However, the cross-sectional analysis revealed that the percentage of low-income households that are energy poor is reducing for the rural households but increasing for their urban counterparts from 2008 to 2014. The panel and cross-sectional results of the contribution of the energy dimensions in multidimensional energy poverty shows that the low-income households are especially energy poor in terms of heating fuel. The findings from the econometric estimates partly confirmed an energy ladder behaviour for the energy choice for cooking. An energy stacking behaviour was confirmed for the low- income households for these energy services - heating and lighting. Moreover, it was found that with respect to cooking and heating, low-income households living in a modern dwelling, having a small household size and residing in an urban area are less likely to use transitional or traditional energy carriers but most likely to use modern energy carriers. In addition, low-income households are more likely to use modern energy carriers for their cooking and heating in 2010, 2012 and 2014 than in 2008. For lighting energy service, low- income households living in a modern dwelling in an urban settlement are most likely to use modern energy carriers for lighting and less likely to use transitional energy carriers or candles. Only in 2014 were low-income households more likely to use modern energy carriers for lighting than in 2008. The results further showed that modern energy carriers have the highest probability of being preferred for lighting followed by cooking and lastly heating. Also emerging from the findings are that more urban low-income households are receiving the Free Basic Electricity (FBE) grant than their counterparts in the rural areas. The probability of low-income households owning entertainment/education appliance and food preserving appliance is positively influenced by access to Free Basic Electricity. The low- income households living in an urban settlement and in a modern type of dwelling supported this result. However, household size does not seems to support this result should it grow larger.
- Full Text:
- Date Issued: 2018
Co-production of trust for effective local governance: a case study of the Nelson Mandela Bay Municipality
- Authors: Jakoet-Salie, Amina
- Date: 2018
- Subjects: Public participation -- South Africa -- Nelson Mandela Bay Local government -- South Africa -- Nelson Mandela Bay
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/20297 , vital:29227
- Description: The primary aim of this study was to establish whether co-production of public services will lead to trust in service delivery and ultimately to trust in government, with specific reference to the Nelson Mandela Bay Municipality (NMBM). Furthermore, this research investigatedthe fundamental reasons for the mistrust in government, in lieu of the ongoing service delivery protests and officials who are at times not held accountable for their actions. This study acknowledges that there is an underlying problem of lack ofpublic participation and co-production at the sphere of local government.This research is solely based on the assumption thatif co-production is non-existent or problematic and if communities lose trust in the performance of municipalities, any attempts by the government to address these challenges relating to effective governance would be ineffective.The studyprovidesan in-depth theoretical review on co-production, public participation, citizen engagement and trust, with reference to both the national and international context. The study employed both quantitative and qualitative research approaches to validate the research questions and authenticate the problem statement. The triangulation approach allowed the researcher to effectively engage the strengths of both research methodologies. The research findings from the empirical survey were statistically analysed using statistical procedures. The data analysis, derived from the qualitative research approach, involved thematic content analysis. The sample populations for the study comprised councillors selected senior officials and ward committee members. For the quantitative approach, questionnaires were employed for the councillors and the officials. Focus group interviews were conducted with ward committee members as the qualitative component of the study. The findings of the study revealed that as a result of communities’ increasing lack of trust and confidence in local government, service delivery protests are increasing.The study further indicated thatcommunities in the NMBM are generally not well informed about the development plans of the municipality and do not adequately participate in local government activities.The findings from the focus group interviewsconcluded that the working relationship between the ward councillors and ward committee members was somewhat strained and this could have a negative impact on service delivery and ultimately trust levels.Recommendations emanating from the empirical survey and focus group interviews are presented to promote public participation and co-production which essentially could lead to an increase in trust in local government. Legislative prescriptions require that communitiesshould actively participate in the decision-making processes at the local sphere of government. In this regard, a normative model is proposed to further enhance this requirement.
- Full Text:
- Date Issued: 2018
- Authors: Jakoet-Salie, Amina
- Date: 2018
- Subjects: Public participation -- South Africa -- Nelson Mandela Bay Local government -- South Africa -- Nelson Mandela Bay
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/20297 , vital:29227
- Description: The primary aim of this study was to establish whether co-production of public services will lead to trust in service delivery and ultimately to trust in government, with specific reference to the Nelson Mandela Bay Municipality (NMBM). Furthermore, this research investigatedthe fundamental reasons for the mistrust in government, in lieu of the ongoing service delivery protests and officials who are at times not held accountable for their actions. This study acknowledges that there is an underlying problem of lack ofpublic participation and co-production at the sphere of local government.This research is solely based on the assumption thatif co-production is non-existent or problematic and if communities lose trust in the performance of municipalities, any attempts by the government to address these challenges relating to effective governance would be ineffective.The studyprovidesan in-depth theoretical review on co-production, public participation, citizen engagement and trust, with reference to both the national and international context. The study employed both quantitative and qualitative research approaches to validate the research questions and authenticate the problem statement. The triangulation approach allowed the researcher to effectively engage the strengths of both research methodologies. The research findings from the empirical survey were statistically analysed using statistical procedures. The data analysis, derived from the qualitative research approach, involved thematic content analysis. The sample populations for the study comprised councillors selected senior officials and ward committee members. For the quantitative approach, questionnaires were employed for the councillors and the officials. Focus group interviews were conducted with ward committee members as the qualitative component of the study. The findings of the study revealed that as a result of communities’ increasing lack of trust and confidence in local government, service delivery protests are increasing.The study further indicated thatcommunities in the NMBM are generally not well informed about the development plans of the municipality and do not adequately participate in local government activities.The findings from the focus group interviewsconcluded that the working relationship between the ward councillors and ward committee members was somewhat strained and this could have a negative impact on service delivery and ultimately trust levels.Recommendations emanating from the empirical survey and focus group interviews are presented to promote public participation and co-production which essentially could lead to an increase in trust in local government. Legislative prescriptions require that communitiesshould actively participate in the decision-making processes at the local sphere of government. In this regard, a normative model is proposed to further enhance this requirement.
- Full Text:
- Date Issued: 2018
Disputes, relationships and identity: analysing human-human conflicts as a basis for human-wildlife conflicts in the mid-Zambezi valley, northern Zimbabwe
- Authors: Jani, Vincent
- Date: 2018
- Subjects: Environmental geography , Wildlife management Wildlife conservation Human-animal relationships
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/30364 , vital:30934
- Description: This study analysed how human-human conflicts (HHCs) underlie human-wildlife conflicts (HWCs) in Chapoto Ward in the mid-Zambezi valley, northern Zimbabwe. The analytical framework entailed the use of the Levels of Conflict Model (LCM) – a model that seeks to expose different levels of conflict. To gain a rich understanding of the conflicts under investigation, a qualitative research design was employed with triangulation at its core in order to ensure the necessary quality and rigour of the findings. In this case, four different types of data were used, namely, in-depth interviews with heads of households, key informant interviews, focus group sessions, and document analysis. Thematic and content analysis were used to analyse the data which were classified into the following conflict levels: surface level disputes; an intermediate level involving ongoing conflictual relationships; and a deeper level of conflict rooted in identity. Three key findings were generated. Firstly, a substantial number of long-standing disputes were recorded during the ten-year period (2007-2016). Most of these disputes were not resolved because they had a long and complicated history which resulted in previous disputes resurfacing whenever a current one arose. Secondly, the history of unresolved conflict resulted in mistrust and failure to find common ground between the parties involved in the conflict. Lastly, the source of the disputes and unresolved conflicts was traced back to the identity level. This means that the antagonistic relationships among the stakeholders spilled over into the labelling and stigmatisation of all the groups involved in wildlife management. Thus, conflict between people and wildlife in Chapoto Ward was demonstrated to be a complex issue and underlain by HHC. These findings support the new line of thinking that HWC should not be viewed as simply a problem between people and wildlife but as a conflict between stakeholders with divergent views over wildlife management which manifests as HHC. Furthermore, the degree of polarisation between groups is substantial. In light of these findings, four major conclusions are drawn. Firstly, is the need to shift from narrowly focusing on the proximate conflicts between people and wildlife, to fully understand the complexity of conflict in order to arrive at solutions that successfully mitigate conflict between people and wildlife, and to address the underlying and deep-rooted conflict between stakeholders with divergent wildlife management goals. Secondly, the need for concerted efforts to ensure the involvement of all stakeholders, including women, in wildlife management and conservation by developing structures that enhance active participation of the local people in decision-making, v which promotes the success of conservation initiatives. Thirdly, the need to address the underlying and deep-rooted conflicts over wildlife management by building positive relationships and trust between stakeholders through the holding of regular capacity building workshops based on a more respectful and inclusive process. Fourthly, is the need to consider the interests of both ethnic groups, namely the Doma and the Chikunda by gathering information on the preferences of the identity groups in order to increase cooperation among them. Overall, the thesis introduces a new lens through which one can clearly understand the complexity of the conflict between people and wildlife.
- Full Text:
- Date Issued: 2018
- Authors: Jani, Vincent
- Date: 2018
- Subjects: Environmental geography , Wildlife management Wildlife conservation Human-animal relationships
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/30364 , vital:30934
- Description: This study analysed how human-human conflicts (HHCs) underlie human-wildlife conflicts (HWCs) in Chapoto Ward in the mid-Zambezi valley, northern Zimbabwe. The analytical framework entailed the use of the Levels of Conflict Model (LCM) – a model that seeks to expose different levels of conflict. To gain a rich understanding of the conflicts under investigation, a qualitative research design was employed with triangulation at its core in order to ensure the necessary quality and rigour of the findings. In this case, four different types of data were used, namely, in-depth interviews with heads of households, key informant interviews, focus group sessions, and document analysis. Thematic and content analysis were used to analyse the data which were classified into the following conflict levels: surface level disputes; an intermediate level involving ongoing conflictual relationships; and a deeper level of conflict rooted in identity. Three key findings were generated. Firstly, a substantial number of long-standing disputes were recorded during the ten-year period (2007-2016). Most of these disputes were not resolved because they had a long and complicated history which resulted in previous disputes resurfacing whenever a current one arose. Secondly, the history of unresolved conflict resulted in mistrust and failure to find common ground between the parties involved in the conflict. Lastly, the source of the disputes and unresolved conflicts was traced back to the identity level. This means that the antagonistic relationships among the stakeholders spilled over into the labelling and stigmatisation of all the groups involved in wildlife management. Thus, conflict between people and wildlife in Chapoto Ward was demonstrated to be a complex issue and underlain by HHC. These findings support the new line of thinking that HWC should not be viewed as simply a problem between people and wildlife but as a conflict between stakeholders with divergent views over wildlife management which manifests as HHC. Furthermore, the degree of polarisation between groups is substantial. In light of these findings, four major conclusions are drawn. Firstly, is the need to shift from narrowly focusing on the proximate conflicts between people and wildlife, to fully understand the complexity of conflict in order to arrive at solutions that successfully mitigate conflict between people and wildlife, and to address the underlying and deep-rooted conflict between stakeholders with divergent wildlife management goals. Secondly, the need for concerted efforts to ensure the involvement of all stakeholders, including women, in wildlife management and conservation by developing structures that enhance active participation of the local people in decision-making, v which promotes the success of conservation initiatives. Thirdly, the need to address the underlying and deep-rooted conflicts over wildlife management by building positive relationships and trust between stakeholders through the holding of regular capacity building workshops based on a more respectful and inclusive process. Fourthly, is the need to consider the interests of both ethnic groups, namely the Doma and the Chikunda by gathering information on the preferences of the identity groups in order to increase cooperation among them. Overall, the thesis introduces a new lens through which one can clearly understand the complexity of the conflict between people and wildlife.
- Full Text:
- Date Issued: 2018
Baculovirus synergism: investigating mixed alphabaculovirus and betabaculovirus infections in the false codling moth, thaumatotibia leucotreta, for improved pest control
- Authors: Jukes, Michael David
- Date: 2018
- Subjects: Baculoviruses , Cryptophlebia leucotreta -- Biological control , Citrus -- Diseases and pests -- South Africa , Pests -- Integrated control , Nucleopolyhedroviruses , Natural pesticides , Cryptophlebia leucotreta granulovirus (CrleGV)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61797 , vital:28061
- Description: Baculovirus based biopesticides are an effective and environmentally friendly approach for the control of agriculturally important insect pests. The false codling moth (FCM), Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae), is indigenous to southern Africa and is a major pest of citrus crops. This moth poses a serious risk to export of fruit to foreign markets and the control of this pest is therefore imperative. The Cryptophlebia leucotreta granulovirus (CrleGV) has been commercially formulated into the products Cryptogran™ and Cryptex®. These products have been used successfully for over a decade as part of a rigorous integrated pest management (IPM) programme to control T. leucotreta in South Africa. There is however, a continuous need to improve this programme while also addressing new challenges as they arise. An example of a rising concern is the possibility of resistance developing towards CrleGV. This was seen in Europe with field populations of the codling moth, Cydia pomonella (Linnaeus) (Lepidoptera: Tortricidae), which developed resistance to the Mexican isolate of the Cydia pomonella granulovirus (CpGV-M). To prevent such a scenario occurring in South Africa, there is a need to improve existing methods of control. For example, additional baculovirus variants can be isolated and characterised for determining virulence, which can then be developed as new biopesticides. Additionally, the potential for synergistic effects between different baculoviruses infecting the same host can be explored for improved virulence. A novel nucleopolyhedrovirus was recently identified in T. leucotreta larval homogenates which were also infected with CrleGV. This provided unique opportunities for continued research and development. In this study, a method using C. pomonella larvae, which can be infected by the NPV but not by CrleGV, was developed to separate the NPV from GV-NPV mixtures in an in vivo system. Examination of NPV OBs by transmission electron microscopy showed purified occlusion bodies with a single nucleopolyhedrovirus morphology (SNPV). Genetic characterisation identified the novel NPV as Cryptophlebia peltastica nucleopolyhedrovirus (CrpeNPV), which was recently isolated from the litchi moth, Cryptophlebia peltastica (Meyrick) (Lepidoptera: Tortricidae). To begin examining the potential for synergism between the two viruses, a multiplex PCR assay was developed to accurately detect CrleGV and/or CrpeNPV in mixed infections. This assay was applied to various samples to screen for the presence of CrpeNPV and CrleGV. Additionally, a validation experiment was performed using different combinations of CrpeNPV and/or CrleGV to evaluate the effectiveness of the mPCR assay. The results obtained indicated a high degree of specificity with the correct amplicons generated for each test sample. The biological activity of CrpeNPV and CrleGV were evaluated using surface dose bioassays, both individually and in various combinations, against T. leucotreta neonate larvae in a laboratory setting. A synergistic effect was recorded in the combination treatments, showing improved virulence when compared against each virus in isolation. The LC90 for CrpeNPV and CrleGV when applied alone against T. leucotreta was calculated to be 2.75*106 and 3.00*106 OBs.ml"1 respectively. These values decreased to 1.07*106 and 7.18*105 OBs.ml"1 when combinations of CrleGV and CrpeNPV were applied at ratios of 3:1 and 1:3 respectively. These results indicate a potential for developing improved biopesticides for the control of T. leucotreta in the field. To better understand the interactions between CrleGV and CrpeNPV, experiments involving the serial passage of these viruses through T. leucotreta larvae were performed. This was done using each virus in isolation as well as both viruses in different combinations. Genomic DNA was extracted from recovered occlusion bodies after each passage and examined by multiplex and quantitative PCR. This analysis enabled the detection of each virus present throughout this assay, as well as recording shifts in the ratio of CrleGV and CrpeNPV at each passage. CrleGV rapidly became the dominant virus in all treatments, indicating a potentially antagonistic interaction during serial passage. Additionally, CrpeNPV and CrleGV were detected in treatments which were not originally inoculated with one or either virus, indicating potential covert infections in T. leucotreta. Occlusion bodies recovered from the final passage were used to inoculate C. pomonella larvae to isolate CrpeNPV from CrleGV. Genomic DNA was extracted from these CrpeNPV OBs and examined by restriction endonuclease assays and next generation sequencing. This enabled the identification of potential recombination events which may have occurred during the dual GV and NPV infections throughout the passage assay. No recombination events were identified in the CrpeNPV genome sequences assembled from virus collected at the end of the passage assay. Lastly, the efficacy of CrpeNPV and CrleGV, both alone and in various combinations, was evaluated in the field. In two separate trials conducted on citrus, unfavorable field conditions resulted in no significant reduction in fruit infestation for both the virus and chemical treatments. While not statistically significant, virus treatments were recorded to have the lowest levels of fruit infestation with a measured reduction of up to 64 %. This study is the first to report a synergistic effect between CrleGV and CrpeNPV in T. leucotreta. The discovery of beneficial interactions creates an opportunity for the development of novel biopesticides for improved control of this pest in South Africa.
- Full Text:
- Date Issued: 2018
- Authors: Jukes, Michael David
- Date: 2018
- Subjects: Baculoviruses , Cryptophlebia leucotreta -- Biological control , Citrus -- Diseases and pests -- South Africa , Pests -- Integrated control , Nucleopolyhedroviruses , Natural pesticides , Cryptophlebia leucotreta granulovirus (CrleGV)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61797 , vital:28061
- Description: Baculovirus based biopesticides are an effective and environmentally friendly approach for the control of agriculturally important insect pests. The false codling moth (FCM), Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae), is indigenous to southern Africa and is a major pest of citrus crops. This moth poses a serious risk to export of fruit to foreign markets and the control of this pest is therefore imperative. The Cryptophlebia leucotreta granulovirus (CrleGV) has been commercially formulated into the products Cryptogran™ and Cryptex®. These products have been used successfully for over a decade as part of a rigorous integrated pest management (IPM) programme to control T. leucotreta in South Africa. There is however, a continuous need to improve this programme while also addressing new challenges as they arise. An example of a rising concern is the possibility of resistance developing towards CrleGV. This was seen in Europe with field populations of the codling moth, Cydia pomonella (Linnaeus) (Lepidoptera: Tortricidae), which developed resistance to the Mexican isolate of the Cydia pomonella granulovirus (CpGV-M). To prevent such a scenario occurring in South Africa, there is a need to improve existing methods of control. For example, additional baculovirus variants can be isolated and characterised for determining virulence, which can then be developed as new biopesticides. Additionally, the potential for synergistic effects between different baculoviruses infecting the same host can be explored for improved virulence. A novel nucleopolyhedrovirus was recently identified in T. leucotreta larval homogenates which were also infected with CrleGV. This provided unique opportunities for continued research and development. In this study, a method using C. pomonella larvae, which can be infected by the NPV but not by CrleGV, was developed to separate the NPV from GV-NPV mixtures in an in vivo system. Examination of NPV OBs by transmission electron microscopy showed purified occlusion bodies with a single nucleopolyhedrovirus morphology (SNPV). Genetic characterisation identified the novel NPV as Cryptophlebia peltastica nucleopolyhedrovirus (CrpeNPV), which was recently isolated from the litchi moth, Cryptophlebia peltastica (Meyrick) (Lepidoptera: Tortricidae). To begin examining the potential for synergism between the two viruses, a multiplex PCR assay was developed to accurately detect CrleGV and/or CrpeNPV in mixed infections. This assay was applied to various samples to screen for the presence of CrpeNPV and CrleGV. Additionally, a validation experiment was performed using different combinations of CrpeNPV and/or CrleGV to evaluate the effectiveness of the mPCR assay. The results obtained indicated a high degree of specificity with the correct amplicons generated for each test sample. The biological activity of CrpeNPV and CrleGV were evaluated using surface dose bioassays, both individually and in various combinations, against T. leucotreta neonate larvae in a laboratory setting. A synergistic effect was recorded in the combination treatments, showing improved virulence when compared against each virus in isolation. The LC90 for CrpeNPV and CrleGV when applied alone against T. leucotreta was calculated to be 2.75*106 and 3.00*106 OBs.ml"1 respectively. These values decreased to 1.07*106 and 7.18*105 OBs.ml"1 when combinations of CrleGV and CrpeNPV were applied at ratios of 3:1 and 1:3 respectively. These results indicate a potential for developing improved biopesticides for the control of T. leucotreta in the field. To better understand the interactions between CrleGV and CrpeNPV, experiments involving the serial passage of these viruses through T. leucotreta larvae were performed. This was done using each virus in isolation as well as both viruses in different combinations. Genomic DNA was extracted from recovered occlusion bodies after each passage and examined by multiplex and quantitative PCR. This analysis enabled the detection of each virus present throughout this assay, as well as recording shifts in the ratio of CrleGV and CrpeNPV at each passage. CrleGV rapidly became the dominant virus in all treatments, indicating a potentially antagonistic interaction during serial passage. Additionally, CrpeNPV and CrleGV were detected in treatments which were not originally inoculated with one or either virus, indicating potential covert infections in T. leucotreta. Occlusion bodies recovered from the final passage were used to inoculate C. pomonella larvae to isolate CrpeNPV from CrleGV. Genomic DNA was extracted from these CrpeNPV OBs and examined by restriction endonuclease assays and next generation sequencing. This enabled the identification of potential recombination events which may have occurred during the dual GV and NPV infections throughout the passage assay. No recombination events were identified in the CrpeNPV genome sequences assembled from virus collected at the end of the passage assay. Lastly, the efficacy of CrpeNPV and CrleGV, both alone and in various combinations, was evaluated in the field. In two separate trials conducted on citrus, unfavorable field conditions resulted in no significant reduction in fruit infestation for both the virus and chemical treatments. While not statistically significant, virus treatments were recorded to have the lowest levels of fruit infestation with a measured reduction of up to 64 %. This study is the first to report a synergistic effect between CrleGV and CrpeNPV in T. leucotreta. The discovery of beneficial interactions creates an opportunity for the development of novel biopesticides for improved control of this pest in South Africa.
- Full Text:
- Date Issued: 2018
An investigation of the correlation of mitochondrial biogenesis, mitochondrial DNA methylation, mitochondrial network topology and adipogenesis in the human adipose-derived mesenchymal stromal stem cell model
- Authors: Kadye, Rose
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62637 , vital:28222
- Description: Expected release date-April 2019
- Full Text:
- Date Issued: 2018
- Authors: Kadye, Rose
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62637 , vital:28222
- Description: Expected release date-April 2019
- Full Text:
- Date Issued: 2018
Knowledge and knowers in Educational Leadership and Management (ELM) Master’s Programmes in South Africa
- Authors: Kajee, Farhana Amod
- Date: 2018
- Subjects: Educational leadership -- South Africa , Teachers -- Training of -- South Africa , Education, Higher -- South Africa , Master of education degree -- South Africa , Knowledge, Theory of , Educational sociology -- South Africa , Education, Higher -- Aims and objectives -- South Africa , Legitimation Code Theory (LCT)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60698 , vital:27819
- Description: This dissertation examines the knowledge and knower practices in the Master’s in Educational Leadership and Management (ELM) coursework programmes at South African public universities. This study was prompted by my growing awareness of problems and tensions in the field of ELM generally, and at the level of programme design of the M Ed degree in particular. Many of these had been identified by a national audit of coursework M Eds in ELM (CHE, 2010), and this study sought to find a way of theorising these with a view to improving both course design and teaching. To this end I employed Maton’s Legitimation Code Theory (LCT) which enables critical engagement with knowledge and knowers in programmes, how they are positioned, and how this positioning may be problematic. Hence my first research question sought to discover and critique what counted as knowledge in these programmes and why, while the second asked how knowers were positioned, and why this had come to be the case. LCT has its roots in the work of Bernstein and Maton, whose preoccupation with curriculum was/is driven by a sense of social justice: if we can understand how and why the curriculum is organised and presented in a particular way, it becomes possible to re-imagine teaching and learning, making it accessible to a broader, more inclusive body of learners. The study also drew on critical realism as an underlabourer. This philosophy provided a nuanced understanding of ontology, encouraging and enabling me, as researcher, to unearth causal mechanisms driving the status quo. Only seven South African universities currently offer the coursework option of a Master’s degree in ELM, compared to thirteen when the audit was conducted in 2010. Six of the universities agreed to take part in the study. Data was gathered through content analysis of the six course outlines and interviews with individual co-ordinators or academics centrally involved in the programmes. Through the development of a translation device I was able to establishing that a knower code was dominant in the programmes. Using this point as my departure, I interrogated the knowledge practices and found that different types of knowledge were being privileged across the programmes, with some having a practical/professional leaning and others a more academic/theoretical orientation. The resultant tension does, I argue, restrict knowledge building and helps to account for the fact that the field is generally considered to be under-theorised. The fact all of these programme are registered with the same national qualifications authority, ostensibly following the same national guidelines for Master’s degrees is worrying. The study attempts to find underlying, historically significant reasons for this unevenness. An analysis of the programmes revealed a leaning towards supportive pedagogical approaches. While all programmes promote a cultivated gaze their purposes are not always the same. While a hegemonic practices potential for opening counts as knowledge, cultivated gaze can enable transformation, it can also encourage that can impede real change and empowerment. The study has the up much needed debate on what is meant by a Master’s in ELM, what and what kinds of knower are envisaged.
- Full Text:
- Date Issued: 2018
- Authors: Kajee, Farhana Amod
- Date: 2018
- Subjects: Educational leadership -- South Africa , Teachers -- Training of -- South Africa , Education, Higher -- South Africa , Master of education degree -- South Africa , Knowledge, Theory of , Educational sociology -- South Africa , Education, Higher -- Aims and objectives -- South Africa , Legitimation Code Theory (LCT)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60698 , vital:27819
- Description: This dissertation examines the knowledge and knower practices in the Master’s in Educational Leadership and Management (ELM) coursework programmes at South African public universities. This study was prompted by my growing awareness of problems and tensions in the field of ELM generally, and at the level of programme design of the M Ed degree in particular. Many of these had been identified by a national audit of coursework M Eds in ELM (CHE, 2010), and this study sought to find a way of theorising these with a view to improving both course design and teaching. To this end I employed Maton’s Legitimation Code Theory (LCT) which enables critical engagement with knowledge and knowers in programmes, how they are positioned, and how this positioning may be problematic. Hence my first research question sought to discover and critique what counted as knowledge in these programmes and why, while the second asked how knowers were positioned, and why this had come to be the case. LCT has its roots in the work of Bernstein and Maton, whose preoccupation with curriculum was/is driven by a sense of social justice: if we can understand how and why the curriculum is organised and presented in a particular way, it becomes possible to re-imagine teaching and learning, making it accessible to a broader, more inclusive body of learners. The study also drew on critical realism as an underlabourer. This philosophy provided a nuanced understanding of ontology, encouraging and enabling me, as researcher, to unearth causal mechanisms driving the status quo. Only seven South African universities currently offer the coursework option of a Master’s degree in ELM, compared to thirteen when the audit was conducted in 2010. Six of the universities agreed to take part in the study. Data was gathered through content analysis of the six course outlines and interviews with individual co-ordinators or academics centrally involved in the programmes. Through the development of a translation device I was able to establishing that a knower code was dominant in the programmes. Using this point as my departure, I interrogated the knowledge practices and found that different types of knowledge were being privileged across the programmes, with some having a practical/professional leaning and others a more academic/theoretical orientation. The resultant tension does, I argue, restrict knowledge building and helps to account for the fact that the field is generally considered to be under-theorised. The fact all of these programme are registered with the same national qualifications authority, ostensibly following the same national guidelines for Master’s degrees is worrying. The study attempts to find underlying, historically significant reasons for this unevenness. An analysis of the programmes revealed a leaning towards supportive pedagogical approaches. While all programmes promote a cultivated gaze their purposes are not always the same. While a hegemonic practices potential for opening counts as knowledge, cultivated gaze can enable transformation, it can also encourage that can impede real change and empowerment. The study has the up much needed debate on what is meant by a Master’s in ELM, what and what kinds of knower are envisaged.
- Full Text:
- Date Issued: 2018
Evaluating selected enterprises for sustainable social development in South Africa :|ba case study of Buffalo City Municipality, Eastern Cape
- Authors: Kajiita, Robert Mutemi
- Date: 2018
- Subjects: Social entrepreneurship Social responsibility of business Nonprofit organizations -- Management
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/10829 , vital:35825
- Description: Globally, countries, institutions, and organizations are investing time, resources, and human capital on finding best solutions to address poverty, inequality and unemployment; and importantly on achieving sustainable development. This study sought to investigate how social enterprises in Buffalo City Metropolitan Municipality (BCMM) contribute to sustainable social development within the municipality and the country at large. The study endeavoured to answer the following research questions: what is the knowledge level among the selected stakeholders on social enterprise in BCMM? What is the scope, application, and sustainability of selected social enterprises in BCMM? What is the contribution of selected social enterprises in social development in BCMM? What are the bottlenecks associated with the application of social entrepreneurship in BCMM? These questions were answered through mixed methods approaches and techniques, where both qualitative and quantitative data was collected and analysed. The data was collected through in-depth interviews (key informant technique) and a min-survey which was administered to users of the social enterprises. Qualitative data was analysed thematically, while quantitative data was statistically analysed with help of SPSS software. The interpretation of the findings was premised on pragmatic and transformative paradigms. The study further used theoretical lenses such as empowerment theory, capability approach and positive theory of social enterprise to support and explain the findings. The main findings showed that: the selected stakeholders conceptualized social enterprises through the African lens of communal living; the social enterprises widely provided their services across a range of sectors and geographical locations; the social enterprises had direct and indirect contribution to socio-economic development in BCMM. This was specifically through provision of employment, training and skill development among others; the future of social enterprises in the country is bright as many sectors presented opportunities for social investment; and social enterprises face financial constraints, lack of skills in the sector, and competition from the mainstream market. The recommendations from this study address government entities, social services providers and practitioners, social enterprises, and researchers on pertinent endeavours to improve the growth and development of social enterprises. The study concludes that social enterprises are: vital vehicles of socio-economic development, more especially for the marginalized segment of the populations; tools for reducing inequality; platforms for innovations, community participation and conduits of empowerment interventions. Thus, social enterprises play dynamic role and presents potential for capable sustainable social development in the local communities and the South African community at large.
- Full Text:
- Date Issued: 2018
- Authors: Kajiita, Robert Mutemi
- Date: 2018
- Subjects: Social entrepreneurship Social responsibility of business Nonprofit organizations -- Management
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/10829 , vital:35825
- Description: Globally, countries, institutions, and organizations are investing time, resources, and human capital on finding best solutions to address poverty, inequality and unemployment; and importantly on achieving sustainable development. This study sought to investigate how social enterprises in Buffalo City Metropolitan Municipality (BCMM) contribute to sustainable social development within the municipality and the country at large. The study endeavoured to answer the following research questions: what is the knowledge level among the selected stakeholders on social enterprise in BCMM? What is the scope, application, and sustainability of selected social enterprises in BCMM? What is the contribution of selected social enterprises in social development in BCMM? What are the bottlenecks associated with the application of social entrepreneurship in BCMM? These questions were answered through mixed methods approaches and techniques, where both qualitative and quantitative data was collected and analysed. The data was collected through in-depth interviews (key informant technique) and a min-survey which was administered to users of the social enterprises. Qualitative data was analysed thematically, while quantitative data was statistically analysed with help of SPSS software. The interpretation of the findings was premised on pragmatic and transformative paradigms. The study further used theoretical lenses such as empowerment theory, capability approach and positive theory of social enterprise to support and explain the findings. The main findings showed that: the selected stakeholders conceptualized social enterprises through the African lens of communal living; the social enterprises widely provided their services across a range of sectors and geographical locations; the social enterprises had direct and indirect contribution to socio-economic development in BCMM. This was specifically through provision of employment, training and skill development among others; the future of social enterprises in the country is bright as many sectors presented opportunities for social investment; and social enterprises face financial constraints, lack of skills in the sector, and competition from the mainstream market. The recommendations from this study address government entities, social services providers and practitioners, social enterprises, and researchers on pertinent endeavours to improve the growth and development of social enterprises. The study concludes that social enterprises are: vital vehicles of socio-economic development, more especially for the marginalized segment of the populations; tools for reducing inequality; platforms for innovations, community participation and conduits of empowerment interventions. Thus, social enterprises play dynamic role and presents potential for capable sustainable social development in the local communities and the South African community at large.
- Full Text:
- Date Issued: 2018
Understanding the role of social capital in enhancing community resilience to natural disasters: a case study of Muzarabani District, Zimbabwe
- Authors: Kasimba, Rosemary
- Date: 2018
- Subjects: Social capital (Sociology) -- Zimbabwe , Natural disasters -- Zimbabwe -- Social aspects , Resilience (Personality trait) -- Zimbabwe , Food security -- Climatic factors -- Zimbabwe , Social sciences -- Network analysis , Cooperativeness -- Zimbabwe
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60292 , vital:27763
- Description: The central focus of the study was to seek an understanding of the role that Social Capital plays in enhancing the resilience and adaptive capacity of the community to floods and droughts in Muzarabani District of Northern Zimbabwe. The study was conducted in two of the wards in Muzarabani District namely Chadereka and Kapembere. In addition, the study sought to understand the coping and adaptation strategies employed by the most vulnerable groups such as the elderly, child heads, women and single heads of households. The specific objectives of the study were: to understand the effects of floods and droughts on residents’ livelihoods and food security, examine residents’ perceptions on droughts andfloods and to document community-based strategies utilised by women, child-headed families and the elderly to improve their livelihood and food security in the face of floods and droughts, explore different types of Social Capital that exist in the study area especially with regard to household resilience to disasters, comprehend the basis of residents’ resilience to floods and droughts and the extent to which vulnerable groups rely on Social Capital when coping with these disasters and to examine the repercussions of residents’ strategies on the community’s institutional structures. The study was informed by Social Capital theory and the social network analysis. Social Capital plays a pivotal role in enhancing the resilience of the community to floods and droughts. Different types of Social Capital that exist and help people to deal with floods and droughts include linking, bonding, and bridging and victim Social Capital. Inhabitants within and outside villages support each other. Non-Governmental Organisations (NGOs) and the government are also working hand in hand with community members to reduce the negative impacts of floods and droughts. Volunteerism, generalised reciprocity and mutual understanding are also at the centre of interventions. The study employed both quantitative and qualitative approaches to achieve its objectives. Questionnaires, focus groups discussions, observations, transect walks, key informant interviews and some participatory methods were used to collect data. SPSS, content and thematic analysis were used to analyse data. The study found that floods and droughts negatively impact on human security, causing acute food shortages, intensifying poverty, spread of water related diseases, increasing divorce rates, children dropping out of school, reduced livestock and crop production, family disintegration, chaos in religion, exacerbating local unemployment as well as negatively affecting the wellbeing of community members. On a positive note, floods in Chadereka cause the deposition of alluvial soils that are good for crop production. However, in Kapembere, volunteerism is not very common; inhabitants are not yet trained about the concept. Community members have also formed cooperatives where they would give each other money or grain. In Chadereka, women have formed a mother-support-group to assist children with food in schools. Strategies being employed by the most vulnerable groups include casual labour, joining cooperatives, migration, taking children from school, hiring out cattle, selling of assets, riverine farming, growing drought-resistant crops, making use of indigenous knowledge systems, skipping meals and exploiting natural resources among others. Some women have resorted to prostitution to increase their resilience to floods and drought impacts such as poverty and acute food shortages. The elderly also hire out their cattle. They also rely on support from the government and NGOs. There are a number of challenges faced by residents in dealing with floods and droughts. Community social relationships, migration, casual labour and the sale of assets are the basis of the people’s resilience against the impacts of floods and droughts. The study identified the following issues which all stakeholders involved could take note of: the government should not always be suspicious of disaster-risk reduction strategies implemented by NGOs as this scares away some of them that are willing to offer untied or unconditional assistance; timely and impartial distribution of agricultural inputs to inhabitants would be extremely useful. Moreover, the government needs to provide resources that support local organisations (formed by the local people) to assist the most vulnerable people in communities. Community leaders, together with the government and NGOs, are encouraged to hold awareness campaign programmes that dispel tribal and ethnic stereotypes, to promote local Social Capital among members of the community. Further investigations in the following areas are critical: A more comprehensive assessment of the determinants of resilience to droughts and floods in Zimbabwe is necessary.A study on the challenges faced by the disabled people and women in polygamous marriages and how they are adapting to floods and droughts, needs to be conducted and a critical investigation on the Zimbabwean government’s strengths and weaknesses in enhancing the resilience of the community to floods and droughts is necessary among others.
- Full Text:
- Date Issued: 2018
- Authors: Kasimba, Rosemary
- Date: 2018
- Subjects: Social capital (Sociology) -- Zimbabwe , Natural disasters -- Zimbabwe -- Social aspects , Resilience (Personality trait) -- Zimbabwe , Food security -- Climatic factors -- Zimbabwe , Social sciences -- Network analysis , Cooperativeness -- Zimbabwe
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/60292 , vital:27763
- Description: The central focus of the study was to seek an understanding of the role that Social Capital plays in enhancing the resilience and adaptive capacity of the community to floods and droughts in Muzarabani District of Northern Zimbabwe. The study was conducted in two of the wards in Muzarabani District namely Chadereka and Kapembere. In addition, the study sought to understand the coping and adaptation strategies employed by the most vulnerable groups such as the elderly, child heads, women and single heads of households. The specific objectives of the study were: to understand the effects of floods and droughts on residents’ livelihoods and food security, examine residents’ perceptions on droughts andfloods and to document community-based strategies utilised by women, child-headed families and the elderly to improve their livelihood and food security in the face of floods and droughts, explore different types of Social Capital that exist in the study area especially with regard to household resilience to disasters, comprehend the basis of residents’ resilience to floods and droughts and the extent to which vulnerable groups rely on Social Capital when coping with these disasters and to examine the repercussions of residents’ strategies on the community’s institutional structures. The study was informed by Social Capital theory and the social network analysis. Social Capital plays a pivotal role in enhancing the resilience of the community to floods and droughts. Different types of Social Capital that exist and help people to deal with floods and droughts include linking, bonding, and bridging and victim Social Capital. Inhabitants within and outside villages support each other. Non-Governmental Organisations (NGOs) and the government are also working hand in hand with community members to reduce the negative impacts of floods and droughts. Volunteerism, generalised reciprocity and mutual understanding are also at the centre of interventions. The study employed both quantitative and qualitative approaches to achieve its objectives. Questionnaires, focus groups discussions, observations, transect walks, key informant interviews and some participatory methods were used to collect data. SPSS, content and thematic analysis were used to analyse data. The study found that floods and droughts negatively impact on human security, causing acute food shortages, intensifying poverty, spread of water related diseases, increasing divorce rates, children dropping out of school, reduced livestock and crop production, family disintegration, chaos in religion, exacerbating local unemployment as well as negatively affecting the wellbeing of community members. On a positive note, floods in Chadereka cause the deposition of alluvial soils that are good for crop production. However, in Kapembere, volunteerism is not very common; inhabitants are not yet trained about the concept. Community members have also formed cooperatives where they would give each other money or grain. In Chadereka, women have formed a mother-support-group to assist children with food in schools. Strategies being employed by the most vulnerable groups include casual labour, joining cooperatives, migration, taking children from school, hiring out cattle, selling of assets, riverine farming, growing drought-resistant crops, making use of indigenous knowledge systems, skipping meals and exploiting natural resources among others. Some women have resorted to prostitution to increase their resilience to floods and drought impacts such as poverty and acute food shortages. The elderly also hire out their cattle. They also rely on support from the government and NGOs. There are a number of challenges faced by residents in dealing with floods and droughts. Community social relationships, migration, casual labour and the sale of assets are the basis of the people’s resilience against the impacts of floods and droughts. The study identified the following issues which all stakeholders involved could take note of: the government should not always be suspicious of disaster-risk reduction strategies implemented by NGOs as this scares away some of them that are willing to offer untied or unconditional assistance; timely and impartial distribution of agricultural inputs to inhabitants would be extremely useful. Moreover, the government needs to provide resources that support local organisations (formed by the local people) to assist the most vulnerable people in communities. Community leaders, together with the government and NGOs, are encouraged to hold awareness campaign programmes that dispel tribal and ethnic stereotypes, to promote local Social Capital among members of the community. Further investigations in the following areas are critical: A more comprehensive assessment of the determinants of resilience to droughts and floods in Zimbabwe is necessary.A study on the challenges faced by the disabled people and women in polygamous marriages and how they are adapting to floods and droughts, needs to be conducted and a critical investigation on the Zimbabwean government’s strengths and weaknesses in enhancing the resilience of the community to floods and droughts is necessary among others.
- Full Text:
- Date Issued: 2018