Efficient market hypothesis : testing weak-form efficiency on the Johannesburg stock exchange
- Authors: Eaton, Bradley Hayes
- Date: 2020
- Subjects: Efficient market theory
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/47895 , vital:40396
- Description: Understanding financial markets is paramount in acknowledging the flow of domestic and foreign funds over time. In this study, net market capitalisation price and simple return characteristics were investigated for the period from January 2009 to December 2017. An empirical, statistical approach was used to explore the possibility that, since the 2008 financial crisis, forward-looking, aggregate market and financial-oriented equity indices have conformed to the Efficient Market Hypothesis. Accordingly, monthly observations were made to ensure long-run traits were identified and scrutinised. Such revelations are important for portfolio diversification, risk, and expected return potentials with respect to South African equity markets. Based on the study, it was found that random walks were evident in both the price and return time-series as a result of significant stochastic price action, supported by evidence suggesting non-normality of price and return distributions. Unit root and stationarity modelling confirmed such traits. However, significant trending behaviours were evident in the auto-correlation figures with regards to prices, despite mean-reverting and stochastic influences. Therefore, it was concluded from the results of the study that the respective time-series were weak-form efficient. The empirical component was supplemented by a comprehensive investigation into the market determinants of financial market inefficiencies, including partial correlations, contagion effects, momentum, financial bubbles, and liquidity issues. Secondary objectives of the study included identifying the roles of security exchanges and the effect of international linkages, as a result of globalisation, on the financial markets. Increased macro-economic and systems integration has led to positive and negative connotations for business cycles. Spill-over effects into global equity markets are evident as can be seen through the co-integration of leading world exchanges, both in the developed and emerging market spheres. Fundamental to this study was the sensitivity of South African equity markets to recessionary pressures, as analysed through the efficiency of aggregated equity indices.
- Full Text:
- Date Issued: 2020
- Authors: Eaton, Bradley Hayes
- Date: 2020
- Subjects: Efficient market theory
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/47895 , vital:40396
- Description: Understanding financial markets is paramount in acknowledging the flow of domestic and foreign funds over time. In this study, net market capitalisation price and simple return characteristics were investigated for the period from January 2009 to December 2017. An empirical, statistical approach was used to explore the possibility that, since the 2008 financial crisis, forward-looking, aggregate market and financial-oriented equity indices have conformed to the Efficient Market Hypothesis. Accordingly, monthly observations were made to ensure long-run traits were identified and scrutinised. Such revelations are important for portfolio diversification, risk, and expected return potentials with respect to South African equity markets. Based on the study, it was found that random walks were evident in both the price and return time-series as a result of significant stochastic price action, supported by evidence suggesting non-normality of price and return distributions. Unit root and stationarity modelling confirmed such traits. However, significant trending behaviours were evident in the auto-correlation figures with regards to prices, despite mean-reverting and stochastic influences. Therefore, it was concluded from the results of the study that the respective time-series were weak-form efficient. The empirical component was supplemented by a comprehensive investigation into the market determinants of financial market inefficiencies, including partial correlations, contagion effects, momentum, financial bubbles, and liquidity issues. Secondary objectives of the study included identifying the roles of security exchanges and the effect of international linkages, as a result of globalisation, on the financial markets. Increased macro-economic and systems integration has led to positive and negative connotations for business cycles. Spill-over effects into global equity markets are evident as can be seen through the co-integration of leading world exchanges, both in the developed and emerging market spheres. Fundamental to this study was the sensitivity of South African equity markets to recessionary pressures, as analysed through the efficiency of aggregated equity indices.
- Full Text:
- Date Issued: 2020
Elucidation of the effect of cannabinoids on ER stress to determine their molecular mechanism of action in breast cancer cells
- Authors: De la Harpe, Amy
- Date: 2020
- Subjects: Endoplasmic reticulum -- Pathophysiology , Breast -- Cancer -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/48213 , vital:40525
- Description: Endoplasmic reticulum (ER) stress is defined as an imbalance between the ER’s protein-folding load and folding capacity. ER stress is induced by various physiological conditions and subsequently triggers the activation of the unfolded protein response (UPR) to re-establish homeostasis and promote cell survival. However, under severe or chronic stress, apoptosis is induced. Normal cells generally do not experience ER stress; however, stressful conditions in the tumour micro-environment facilitates chronic ER stress and UPR activation, which plays a pivotal role in tumour survival. Exacerbation of pre-existing ER stress can trigger cancer cell death, with a minimal effect on normal cells. Currently, no high-throughput method exists to detect and quantify ER stress in cell lines. This study showed that Thioflavin T, a fluorescent dye that binds to misfolded protein aggregates, can be used for the high-throughput detection of ER stress, and provides several advantages over currently used methods. Current literature suggests that cannabinoid treatment may induce cancer cell death via ER stress, however little is known about the mechanism of induction. This study proposed a mechanism that occurs via the influx of Ca2+ via the vanilloid receptor 1 (TRPV1), and subsequent ROS production, which affects protein folding. ER stress was induced using various cannabinoids and measured using Thioflavin T and western blot analysis. The effect of cannabinoid treatment on ROS production and the intracellular Ca2+ concentration was measured. Cannabidiol (CBD) was the most potent ER stress inducer, significantly increasing Ca2+ and ROS accumulation; however, the level of accumulated Ca2+ across cell lines varied, which may be due to the differences in the TRPV1 expression and localization. Concomitant treatment of CBD with an antioxidant significantly increased cell viability and decreased ER stress induction in the MCF7 cell line. Concomitant treatment with a TRPV1 antagonist increased viability in this cell line. In conclusion, the results suggested that CBD may induce ER stress via Ca2+ influx through the TRPV1 receptor, thereby elevating intracellular ROS levels and disrupting protein folding.
- Full Text:
- Date Issued: 2020
- Authors: De la Harpe, Amy
- Date: 2020
- Subjects: Endoplasmic reticulum -- Pathophysiology , Breast -- Cancer -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/48213 , vital:40525
- Description: Endoplasmic reticulum (ER) stress is defined as an imbalance between the ER’s protein-folding load and folding capacity. ER stress is induced by various physiological conditions and subsequently triggers the activation of the unfolded protein response (UPR) to re-establish homeostasis and promote cell survival. However, under severe or chronic stress, apoptosis is induced. Normal cells generally do not experience ER stress; however, stressful conditions in the tumour micro-environment facilitates chronic ER stress and UPR activation, which plays a pivotal role in tumour survival. Exacerbation of pre-existing ER stress can trigger cancer cell death, with a minimal effect on normal cells. Currently, no high-throughput method exists to detect and quantify ER stress in cell lines. This study showed that Thioflavin T, a fluorescent dye that binds to misfolded protein aggregates, can be used for the high-throughput detection of ER stress, and provides several advantages over currently used methods. Current literature suggests that cannabinoid treatment may induce cancer cell death via ER stress, however little is known about the mechanism of induction. This study proposed a mechanism that occurs via the influx of Ca2+ via the vanilloid receptor 1 (TRPV1), and subsequent ROS production, which affects protein folding. ER stress was induced using various cannabinoids and measured using Thioflavin T and western blot analysis. The effect of cannabinoid treatment on ROS production and the intracellular Ca2+ concentration was measured. Cannabidiol (CBD) was the most potent ER stress inducer, significantly increasing Ca2+ and ROS accumulation; however, the level of accumulated Ca2+ across cell lines varied, which may be due to the differences in the TRPV1 expression and localization. Concomitant treatment of CBD with an antioxidant significantly increased cell viability and decreased ER stress induction in the MCF7 cell line. Concomitant treatment with a TRPV1 antagonist increased viability in this cell line. In conclusion, the results suggested that CBD may induce ER stress via Ca2+ influx through the TRPV1 receptor, thereby elevating intracellular ROS levels and disrupting protein folding.
- Full Text:
- Date Issued: 2020
Employee retention as a strategy for the sustainability of rehabilitation services within the Nelson Mandela Bay Health District
- Authors: Campbell, Teneille Dawn
- Date: 2020
- Subjects: Employee retention--South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/47530 , vital:40124
- Description: Health care facilities in the South African public sector have, over time, become notorious for poor service delivery, peppered with issues of poor governance, weak administration capabilities, and ailing working conditions. Often, the consequence hereof is a loss of good talent to both the private sector and health sectors abroad, all the while placing more strain on institutional service delivery capabilities. To achieve the United Nation’s Sustainable Development Goal (SDG) of Universal Health Coverage (UHC) by 2030, the strengthening of health systems is critical. The purpose of this study is therefore to offer supportable solutions to improve and maintain a sustainable rehabilitation service in the Nelson Mandela Metro through successful retention of staff. The aim of this study then is to investigate the influence that Human Resources (HR) processes, working conditions and leadership have had on retention of staff. A review of the available literature was conducted on possible factors that contribute to the problem and the solutions thereof. The study population included all staff that worked in rehabilitation service departments in the public health institutions in the Nelson Mandela Metro, namely; physiotherapy, occupational therapy, speech therapy and audiology. The sample constituted n=51 respondents. Data was collected via a questionnaire as the selected measurement tool. The data was analysed using the statistical data analysis software system, TIBCO Statistica (version 13), and selected methods for quantitative data. The results of the study showed that only HR processes were significantly and positively (r = 0.67, p < 0.05) related to retention. It means that satisfying the HR needs of this population is most likely to retain their employ and improve and maintain rehabilitation service delivery in the selected metro. Descriptive statistics of all the variables were also calculated and reported on. Lastly, the managerial implications of the study findings were reported on.
- Full Text:
- Date Issued: 2020
- Authors: Campbell, Teneille Dawn
- Date: 2020
- Subjects: Employee retention--South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/47530 , vital:40124
- Description: Health care facilities in the South African public sector have, over time, become notorious for poor service delivery, peppered with issues of poor governance, weak administration capabilities, and ailing working conditions. Often, the consequence hereof is a loss of good talent to both the private sector and health sectors abroad, all the while placing more strain on institutional service delivery capabilities. To achieve the United Nation’s Sustainable Development Goal (SDG) of Universal Health Coverage (UHC) by 2030, the strengthening of health systems is critical. The purpose of this study is therefore to offer supportable solutions to improve and maintain a sustainable rehabilitation service in the Nelson Mandela Metro through successful retention of staff. The aim of this study then is to investigate the influence that Human Resources (HR) processes, working conditions and leadership have had on retention of staff. A review of the available literature was conducted on possible factors that contribute to the problem and the solutions thereof. The study population included all staff that worked in rehabilitation service departments in the public health institutions in the Nelson Mandela Metro, namely; physiotherapy, occupational therapy, speech therapy and audiology. The sample constituted n=51 respondents. Data was collected via a questionnaire as the selected measurement tool. The data was analysed using the statistical data analysis software system, TIBCO Statistica (version 13), and selected methods for quantitative data. The results of the study showed that only HR processes were significantly and positively (r = 0.67, p < 0.05) related to retention. It means that satisfying the HR needs of this population is most likely to retain their employ and improve and maintain rehabilitation service delivery in the selected metro. Descriptive statistics of all the variables were also calculated and reported on. Lastly, the managerial implications of the study findings were reported on.
- Full Text:
- Date Issued: 2020
Essential services in light of the 2014 Labour Law amendments
- Authors: Seshoka, Lesiba Job
- Date: 2020
- Subjects: Labor laws and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/47427 , vital:39990
- Description: The topic of the treatise is “Essential Services in light of the 2014 Labour Law amendments”. It aims to investigate the state of essential services in the wake of the 2014 changes to the Labour Relations Act. As Pillay1 puts it, Furthermore, 15 years under our new essential services regime, it is time for reflection to preserve and improve what works and to fix what does not. The treatment of essential services is not playing as planned. In the meantime, notwithstanding the prohibition of strikes in essential services, they occur with disconcerting frequency, duration and intensity”. From these, one can deduce that prior to the changes effected in 2014, there have been serious challenges facing essential service personnel and employers which necessitated a change in legislation. The question, which this treatise tries to answer, is whether such change in legislation would in all likelihood addresses the challenges, which faced essential service employers and employees before it was enacted.
- Full Text:
- Date Issued: 2020
- Authors: Seshoka, Lesiba Job
- Date: 2020
- Subjects: Labor laws and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/47427 , vital:39990
- Description: The topic of the treatise is “Essential Services in light of the 2014 Labour Law amendments”. It aims to investigate the state of essential services in the wake of the 2014 changes to the Labour Relations Act. As Pillay1 puts it, Furthermore, 15 years under our new essential services regime, it is time for reflection to preserve and improve what works and to fix what does not. The treatment of essential services is not playing as planned. In the meantime, notwithstanding the prohibition of strikes in essential services, they occur with disconcerting frequency, duration and intensity”. From these, one can deduce that prior to the changes effected in 2014, there have been serious challenges facing essential service personnel and employers which necessitated a change in legislation. The question, which this treatise tries to answer, is whether such change in legislation would in all likelihood addresses the challenges, which faced essential service employers and employees before it was enacted.
- Full Text:
- Date Issued: 2020
Establishment of an information technology risk management framework within food manufacturing enterprises in South Africa
- Authors: Sandi, Siyabulela
- Date: 2020
- Subjects: Business enterprises -- Computer networks -- Security measures , Information technology -- Security measures Computer security Risk management
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: http://hdl.handle.net/10948/47128 , vital:39812
- Description: Enterprises of all kinds, regardless of the sector, are directly or indirectly dependent on Information Technology (IT) to carry out their daily activities. With this in mind, and correlated with the problem statement that it is “the lack of IT governance principles that lead to exposing enterprises to IT-related threats, vulnerabilities, and risks”, the objective of this study was to establish an Information Technology Risk Management Framework for enterprises within the Food manufacturing industry in South Africa that will ensure that IT-related threats, vulnerabilities, and risks are properly managed. In order to accomplish this, the research followed a process called design science research. The design science research paradigm was used to create a design artificial artefact in the form of a framework. The Nelson Mandela University – Design Science Framework Methodology (NMU-DSFM) was adopted since the objective of the study was to develop a framework. The study has revealed that enterprises within the sector are indeed lagging behind in terms of IT governance principles, hence an artefact called the IT Risk Management Framework for Enterprises within Food Manufacturing Industries in South Africa was developed.
- Full Text:
- Date Issued: 2020
- Authors: Sandi, Siyabulela
- Date: 2020
- Subjects: Business enterprises -- Computer networks -- Security measures , Information technology -- Security measures Computer security Risk management
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: http://hdl.handle.net/10948/47128 , vital:39812
- Description: Enterprises of all kinds, regardless of the sector, are directly or indirectly dependent on Information Technology (IT) to carry out their daily activities. With this in mind, and correlated with the problem statement that it is “the lack of IT governance principles that lead to exposing enterprises to IT-related threats, vulnerabilities, and risks”, the objective of this study was to establish an Information Technology Risk Management Framework for enterprises within the Food manufacturing industry in South Africa that will ensure that IT-related threats, vulnerabilities, and risks are properly managed. In order to accomplish this, the research followed a process called design science research. The design science research paradigm was used to create a design artificial artefact in the form of a framework. The Nelson Mandela University – Design Science Framework Methodology (NMU-DSFM) was adopted since the objective of the study was to develop a framework. The study has revealed that enterprises within the sector are indeed lagging behind in terms of IT governance principles, hence an artefact called the IT Risk Management Framework for Enterprises within Food Manufacturing Industries in South Africa was developed.
- Full Text:
- Date Issued: 2020
Evaluation of product x pre and post cpv implementation
- Authors: Killian, Christopher Grant
- Date: 2020
- Subjects: Pharmaceutical industry
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: http://hdl.handle.net/10948/46447 , vital:39577
- Description: Purpose: Stage 3 of the pharmaceutical process validation lifecycle, is called continued process verification (CPV). CPV is the final stage of lifecycle management and is intended to provide ongoing assurance that during routine production that a process remains in a state of control. Since CPV is a relatively new focus area for regulators, many legacy products will not have undergone Stage 3 process validation. Therefore, an opportunity existed to review the impact and challenges of implementing CPV on a legacy product. Methodology: This study employed quantitative analysis to evaluate the impact of CPV on process stability and end product quality for Product X, a legacy product manufactured at a generics manufacturing facility. Initial Stage 3a CPV was used to review historical process data and identify special cause variation. Corrective and preventative actions were taken to address these statistical outliers and the impact of these process changes were evaluated in Stage 3b. Results: CPV implementation appeared to have an effect on process control, stability and capability for Product X. In Stage 3b, an increase in statistical outliers along with significant changes to process mean and standard deviation were seen for the critical process parameters, average mass and hardness. An improvement in process capability for the critical quality attributes, assay and dissolution, was also seen. Conclusion: The largest benefit of CPV implementation, especially for a legacy product, is the process knowledge gained. This provided opportunities for process improvement and ultimately benefited patient safety.
- Full Text:
- Date Issued: 2020
- Authors: Killian, Christopher Grant
- Date: 2020
- Subjects: Pharmaceutical industry
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: http://hdl.handle.net/10948/46447 , vital:39577
- Description: Purpose: Stage 3 of the pharmaceutical process validation lifecycle, is called continued process verification (CPV). CPV is the final stage of lifecycle management and is intended to provide ongoing assurance that during routine production that a process remains in a state of control. Since CPV is a relatively new focus area for regulators, many legacy products will not have undergone Stage 3 process validation. Therefore, an opportunity existed to review the impact and challenges of implementing CPV on a legacy product. Methodology: This study employed quantitative analysis to evaluate the impact of CPV on process stability and end product quality for Product X, a legacy product manufactured at a generics manufacturing facility. Initial Stage 3a CPV was used to review historical process data and identify special cause variation. Corrective and preventative actions were taken to address these statistical outliers and the impact of these process changes were evaluated in Stage 3b. Results: CPV implementation appeared to have an effect on process control, stability and capability for Product X. In Stage 3b, an increase in statistical outliers along with significant changes to process mean and standard deviation were seen for the critical process parameters, average mass and hardness. An improvement in process capability for the critical quality attributes, assay and dissolution, was also seen. Conclusion: The largest benefit of CPV implementation, especially for a legacy product, is the process knowledge gained. This provided opportunities for process improvement and ultimately benefited patient safety.
- Full Text:
- Date Issued: 2020
Experiences and coping strategies of probation officers in fulfilling their role within the multi-stakeholder child justice system
- Authors: Ndwammbi, Thomani Freddy
- Date: 2020
- Subjects: Probation officers
- Language: English
- Type: Thesis , Masters , MSW
- Identifier: http://hdl.handle.net/10948/46437 , vital:39591
- Description: Probation officers, as social workers, play a central role in the child justice system. They are expected to collaborate with various stakeholders within the multi-stakeholder child justice system. They have to meet the various expectations of these stakeholdersthatincludepolice, prosecutors, lawyers and magistrates while ensuring the best interest of the children involved in the child justice system. Despite the important rolethat isplayed by probation officers in the system, there is a gap in literature on the experiences and coping strategies of probation officers in fulfilling their roles within a multi-stakeholder context. This was a qualitative study that was exploratory-descriptive and contextual in design. A non-probability purposive sampling technique was employed to identify probation officers who are working in Vhembe district, Limpopo and who have a minimum of two years working experience as probation officers. Individual semi-structured interviews were conducted with the selected probation officers, and the data collected was analysed using thematic data analysis. The trustworthiness of the research process and the findings was enhanced by employing a variety of data verification strategies. This research contributes to a greater understanding of probation officers’ experiences and coping strategies in fulfilling their role within the multi-stakeholder child justice system. Thestudy revealed that most probation officers experienced difficulties in fulfilling their role within the multi-stakeholder child justice system. They needed resources, supervisors who understand probation services and full support from the department and other child justice stakeholders. The study revealed various coping strategies that probation officers employed in order to cope with fulfilling their role. Probation Officers use personal resources as a coping strategy, draw support from their colleagues andregard job satisfaction as a coping strategy.
- Full Text:
- Date Issued: 2020
- Authors: Ndwammbi, Thomani Freddy
- Date: 2020
- Subjects: Probation officers
- Language: English
- Type: Thesis , Masters , MSW
- Identifier: http://hdl.handle.net/10948/46437 , vital:39591
- Description: Probation officers, as social workers, play a central role in the child justice system. They are expected to collaborate with various stakeholders within the multi-stakeholder child justice system. They have to meet the various expectations of these stakeholdersthatincludepolice, prosecutors, lawyers and magistrates while ensuring the best interest of the children involved in the child justice system. Despite the important rolethat isplayed by probation officers in the system, there is a gap in literature on the experiences and coping strategies of probation officers in fulfilling their roles within a multi-stakeholder context. This was a qualitative study that was exploratory-descriptive and contextual in design. A non-probability purposive sampling technique was employed to identify probation officers who are working in Vhembe district, Limpopo and who have a minimum of two years working experience as probation officers. Individual semi-structured interviews were conducted with the selected probation officers, and the data collected was analysed using thematic data analysis. The trustworthiness of the research process and the findings was enhanced by employing a variety of data verification strategies. This research contributes to a greater understanding of probation officers’ experiences and coping strategies in fulfilling their role within the multi-stakeholder child justice system. Thestudy revealed that most probation officers experienced difficulties in fulfilling their role within the multi-stakeholder child justice system. They needed resources, supervisors who understand probation services and full support from the department and other child justice stakeholders. The study revealed various coping strategies that probation officers employed in order to cope with fulfilling their role. Probation Officers use personal resources as a coping strategy, draw support from their colleagues andregard job satisfaction as a coping strategy.
- Full Text:
- Date Issued: 2020
Experiences of community service nurses regarding supervision and support from professional nurses in primary health care clinics in Nelson Mandela Bay
- Authors: Zambodla, Ayanda
- Date: 2020
- Subjects: Primary health care -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: http://hdl.handle.net/10948/46456 , vital:39604
- Description: Community servicenursesinSouthAfricaarenewly qualified nurses who have to undertake a one-year community service rotation in public healthcare facility. Recently qualified, they are not yet competent to work alone and require supervision Theobjectiveofthisstudywastoexploreanddescribetheexperiencesofcommunity service nurses with regards to the supervision and support they received from professional nurses at primary healthcare clinics inNelsonMandelaBay.The researcher utilised a qualitative research approach, with an explorative, descriptive and contextual research design inorder to achieve the objectives of this study. The research population comprised community service nurses who had completed their one-year community serviceduringthe2016-2017cycleinaprimary healthcarefacilityinNelsonMandelaBay.Purposivesamplingwasusedtoselectthe research sample. Data collection was done by conducting 10semi-structured interviews. Descriptive field notes supplemented the data. Tesch’smethod of qualitative data analysis was employed to analyse the data. Ethical considerations were applied throughout the study. Trustworthiness of the study was maintained by applyingGuba’s criteria of credibility, transferability, dependability and confirmability. Two main themes emerged from the study. Theme1 focused on the participant's experiences regarding the diverse needs related to the community service placement at primary healthcare clinics. Theme2 related to the participants expressed experiences with regard to social interaction during community service at primary healthcare clinics. The findings of the study enabled recommendations to be made for nursing practice, education and research.
- Full Text:
- Date Issued: 2020
- Authors: Zambodla, Ayanda
- Date: 2020
- Subjects: Primary health care -- South Africa
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: http://hdl.handle.net/10948/46456 , vital:39604
- Description: Community servicenursesinSouthAfricaarenewly qualified nurses who have to undertake a one-year community service rotation in public healthcare facility. Recently qualified, they are not yet competent to work alone and require supervision Theobjectiveofthisstudywastoexploreanddescribetheexperiencesofcommunity service nurses with regards to the supervision and support they received from professional nurses at primary healthcare clinics inNelsonMandelaBay.The researcher utilised a qualitative research approach, with an explorative, descriptive and contextual research design inorder to achieve the objectives of this study. The research population comprised community service nurses who had completed their one-year community serviceduringthe2016-2017cycleinaprimary healthcarefacilityinNelsonMandelaBay.Purposivesamplingwasusedtoselectthe research sample. Data collection was done by conducting 10semi-structured interviews. Descriptive field notes supplemented the data. Tesch’smethod of qualitative data analysis was employed to analyse the data. Ethical considerations were applied throughout the study. Trustworthiness of the study was maintained by applyingGuba’s criteria of credibility, transferability, dependability and confirmability. Two main themes emerged from the study. Theme1 focused on the participant's experiences regarding the diverse needs related to the community service placement at primary healthcare clinics. Theme2 related to the participants expressed experiences with regard to social interaction during community service at primary healthcare clinics. The findings of the study enabled recommendations to be made for nursing practice, education and research.
- Full Text:
- Date Issued: 2020
Exploring student teachers’ self-reflections on implementation of IsiXhosa literacy strategies with Grade 3 learners : a single case study approach
- Authors: Magangxa, Pretty Neliswa
- Date: 2020
- Subjects: Primary school teachers -- South Africa -- Xhosa language , Education -- Curricula
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/46251 , vital:39528
- Description: Reflection is the core aspect in many teacher education programmes around the world, South Africa included. The Department of Higher Education and Training (DHET) regards reflection as a vital tool in integrating theoretical and practical knowledge gained in university coursework with practical knowledge obtained in the school classroom context. Literature highlighted that student teachers do not engage in reflection effectively, especially within the context of African language literacy teaching, thus they feel unprepared to deal with the complexities in classrooms. This has negative repercussions on how learners are taught and achieve their educational attainments. The main aim of this study was to explore and describe student teachers’ selfreflections on implementing isiXhosa literacy strategies with Grade 3 learners. This study further sought to understand their reflections on integrating theory and practice as well as their successes and challenges of implementing theoretical knowledge. The main argument of this study is that reflective thinking is a complex and valuable tool that can be utilised to provide quality teaching and learning. In this qualitative single case study premised on an interpretivist paradigm, I purposively selected student teachers and generated data through classroom observations, individual semi-structured interviews and reflective journals. Data was analysed through thematic analysis and two themes emerged. The findings revealed that student teachers used a learner-centred approach to teach isiXhosa literacy in Grade 3 classrooms. Moreover, it revealed that student teachers experienced curriculum demands that inhibited them from implementing isiXhosa literacy strategies efficiently. Conclusions were made based on ideas of sociocultural theory, the reflective thinking model and literature. From these findings, several recommendations were made for student teachers, literacy teacher educators, mentor teachers and policy makers.
- Full Text:
- Date Issued: 2020
- Authors: Magangxa, Pretty Neliswa
- Date: 2020
- Subjects: Primary school teachers -- South Africa -- Xhosa language , Education -- Curricula
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/46251 , vital:39528
- Description: Reflection is the core aspect in many teacher education programmes around the world, South Africa included. The Department of Higher Education and Training (DHET) regards reflection as a vital tool in integrating theoretical and practical knowledge gained in university coursework with practical knowledge obtained in the school classroom context. Literature highlighted that student teachers do not engage in reflection effectively, especially within the context of African language literacy teaching, thus they feel unprepared to deal with the complexities in classrooms. This has negative repercussions on how learners are taught and achieve their educational attainments. The main aim of this study was to explore and describe student teachers’ selfreflections on implementing isiXhosa literacy strategies with Grade 3 learners. This study further sought to understand their reflections on integrating theory and practice as well as their successes and challenges of implementing theoretical knowledge. The main argument of this study is that reflective thinking is a complex and valuable tool that can be utilised to provide quality teaching and learning. In this qualitative single case study premised on an interpretivist paradigm, I purposively selected student teachers and generated data through classroom observations, individual semi-structured interviews and reflective journals. Data was analysed through thematic analysis and two themes emerged. The findings revealed that student teachers used a learner-centred approach to teach isiXhosa literacy in Grade 3 classrooms. Moreover, it revealed that student teachers experienced curriculum demands that inhibited them from implementing isiXhosa literacy strategies efficiently. Conclusions were made based on ideas of sociocultural theory, the reflective thinking model and literature. From these findings, several recommendations were made for student teachers, literacy teacher educators, mentor teachers and policy makers.
- Full Text:
- Date Issued: 2020
Exploring the career aspirations of youths from a rural secondary school in the Eastern Cape Province
- Authors: Ahmed, Leila
- Date: 2020
- Subjects: Career education -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/45963 , vital:39395
- Description: Many inequalities still exist among those living in both rural and urban areas despite the abolishment of apartheid in 1994. Addressing these inequalities has been deemed important and require urgent attention, especially career education among rural youth, as this is a social justice issue (Watson, 2010). There also appears to be a lack of qualitative research pertaining to the aspirations of rural youth. During sessions with the research team, the teachers and school governing board (SGB) members, it was indicated that the youth in the community seem to be without hope for the future and that career aspirations were lacking. Based on the background and problem identified, the main research question of this study aimed to explore how youths in a rural secondary school perceive how they might actualise their future career aspirations. This research was set within the interpretivist and critical paradigm. Qualitative data was gathered to gain an understanding of how the participants constructed meaning with regard to ways in which they might actualise their career aspirations, the challenges they faced and pathways to overcome these challenges. This study began with nine secondary school rural youths as participants but this number decreased to four as the research progressed. Four data sets were generated, namely photovoice, participant PowerPoint artefact creation, focus group interviews and PowerPoint presentations by participants to the community, learners and school. The data was generated using a qualitative thematic analysis guided by the utilisation of Creswell’s application of Tesch’s (1990) framework. Measures were employed to ensure trustworthiness, credibility, transferability and dependability (Ary, Jacobs, Razavieh & Sorensen, 2010). Both the primary and secondary researchers had access to identical files that contained all the data that was generated and stored by the primary researcher. Ethical approval to conduct the study was obtained from the ethics committee at the university and consent was obtained in writing from all relevant parties participating. This research found that the research participants had future career aspirations that included careers in the medical field, law enforcement, business, IT as well as the music industry. The participants envisaged a hopeful future for themselves, their families, their school and the community. Their aspirations focused on transcending their current lived experiences and attaining financial stability. They wished to give back to their communities and schools to ensure a better future for all. The participants aspired to be instruments of social change. The participants were aware that they would encounter various challenges along their path to actualise their dreams. The anticipated challenges included peer-pressure and negative influences, being confronted by various social ills such as violence, drugs and alcohol, abuse and gangsterism. They understood that a lack of self-belief would lead to hopelessness. The participants were concerned that if they did not succeed at school they would not be promoted to the next grade. They also indicated that parental involvement was a challenge and that they did not receive adequate support from their parents. The participants also mentioned that underperforming teachers and conflict with the SGB could derail their career aspirations. They were also concerned about their lack of financial means, as they did not have the necessary funding to gain access to a university but were aware of ways to overcome these challenges. They indicated that drawing on the spiritual domain is important to them and this included the church and their faith in God as a means to overcome their challenges. Education was also key to actualise their aspirations and the participants mentioned that being focused at school and knowing that education has the potential to open doors served as a form of motivation. They were prepared to work hard to succeed at school. It was important for their teachers to be committed, as this would assist in ensuring their success. They indicated the importance of having access to social capital through networking. This included guidance, support and mentoring, as well as using social media to inform society of their plight in order to receive encouragement and support. It was also noted that the aspirations project of which they were part, afforded the participants with transformative possibilities, as they began to critically reflect on the future. They shared their vision, hope and goals with those around them, which further motivated them to aspire to achieving their goals. The participants became selfconfident as a result of their new abilities. They were open to exploring alternative career opportunities and developed a sense of self-belief that they can realise their goals. The participants began to take a stand, as they were aware that agency begins with them. The findings revealed that the rural youth, their parents, the school as a whole, the life orientation teacher(s), the school principal, the school governing body, the community as well as the Department of Basic Education could guide them and assist rural secondary youths to actualise their aspirations.
- Full Text:
- Date Issued: 2020
- Authors: Ahmed, Leila
- Date: 2020
- Subjects: Career education -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/45963 , vital:39395
- Description: Many inequalities still exist among those living in both rural and urban areas despite the abolishment of apartheid in 1994. Addressing these inequalities has been deemed important and require urgent attention, especially career education among rural youth, as this is a social justice issue (Watson, 2010). There also appears to be a lack of qualitative research pertaining to the aspirations of rural youth. During sessions with the research team, the teachers and school governing board (SGB) members, it was indicated that the youth in the community seem to be without hope for the future and that career aspirations were lacking. Based on the background and problem identified, the main research question of this study aimed to explore how youths in a rural secondary school perceive how they might actualise their future career aspirations. This research was set within the interpretivist and critical paradigm. Qualitative data was gathered to gain an understanding of how the participants constructed meaning with regard to ways in which they might actualise their career aspirations, the challenges they faced and pathways to overcome these challenges. This study began with nine secondary school rural youths as participants but this number decreased to four as the research progressed. Four data sets were generated, namely photovoice, participant PowerPoint artefact creation, focus group interviews and PowerPoint presentations by participants to the community, learners and school. The data was generated using a qualitative thematic analysis guided by the utilisation of Creswell’s application of Tesch’s (1990) framework. Measures were employed to ensure trustworthiness, credibility, transferability and dependability (Ary, Jacobs, Razavieh & Sorensen, 2010). Both the primary and secondary researchers had access to identical files that contained all the data that was generated and stored by the primary researcher. Ethical approval to conduct the study was obtained from the ethics committee at the university and consent was obtained in writing from all relevant parties participating. This research found that the research participants had future career aspirations that included careers in the medical field, law enforcement, business, IT as well as the music industry. The participants envisaged a hopeful future for themselves, their families, their school and the community. Their aspirations focused on transcending their current lived experiences and attaining financial stability. They wished to give back to their communities and schools to ensure a better future for all. The participants aspired to be instruments of social change. The participants were aware that they would encounter various challenges along their path to actualise their dreams. The anticipated challenges included peer-pressure and negative influences, being confronted by various social ills such as violence, drugs and alcohol, abuse and gangsterism. They understood that a lack of self-belief would lead to hopelessness. The participants were concerned that if they did not succeed at school they would not be promoted to the next grade. They also indicated that parental involvement was a challenge and that they did not receive adequate support from their parents. The participants also mentioned that underperforming teachers and conflict with the SGB could derail their career aspirations. They were also concerned about their lack of financial means, as they did not have the necessary funding to gain access to a university but were aware of ways to overcome these challenges. They indicated that drawing on the spiritual domain is important to them and this included the church and their faith in God as a means to overcome their challenges. Education was also key to actualise their aspirations and the participants mentioned that being focused at school and knowing that education has the potential to open doors served as a form of motivation. They were prepared to work hard to succeed at school. It was important for their teachers to be committed, as this would assist in ensuring their success. They indicated the importance of having access to social capital through networking. This included guidance, support and mentoring, as well as using social media to inform society of their plight in order to receive encouragement and support. It was also noted that the aspirations project of which they were part, afforded the participants with transformative possibilities, as they began to critically reflect on the future. They shared their vision, hope and goals with those around them, which further motivated them to aspire to achieving their goals. The participants became selfconfident as a result of their new abilities. They were open to exploring alternative career opportunities and developed a sense of self-belief that they can realise their goals. The participants began to take a stand, as they were aware that agency begins with them. The findings revealed that the rural youth, their parents, the school as a whole, the life orientation teacher(s), the school principal, the school governing body, the community as well as the Department of Basic Education could guide them and assist rural secondary youths to actualise their aspirations.
- Full Text:
- Date Issued: 2020
Exploring the motivational factors of millennials in the automotive sector in South Africa
- Authors: Walters, Ashraf
- Date: 2020
- Subjects: Automobile industry and trade -- South Africa , Employee motivation
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/50709 , vital:42388
- Description: Motivation in the workplace is the willingness of employees to exert high levels of effort in achieving the organisations goals and objectives. Motivation has been studied by psychologists and organisational experts throughout the ages and was consistently found that motivated employees provide organisations with improved productivity and a competitive edge. Millennials, born between the years of 1980 and 2000, are the biggest cohort since the baby boomer to enter the workplace. A significant amount of research was done on the characteristics of millennials but there is a limited amount of empirical research done on understanding and potentially improving motivation of millennials. The automotive industry is a key player and contributor to South Africa’s gross domestic product and employs a great number of people in direct and indirect jobs throughout the value chain. Against this backdrop, research was conducted within the automotive sector in the Gauteng and Eastern Cape (Nelson Mandela Bay) regions in South Africa aimed at exploring motivation under the context of leadership, communication, social responsibility, rewards and, given the tech savvy nature of millennials, the use of technology. This study was conducted under the positivistic paradigm, which employed a quantitative approach, by means of a questionnaire survey. The study and review of the literature by the researcher found that millennials value leadership which supports, and guides as oppose to enforces. Communication, which is transparent, concise but frequent. They are willing to make personal sacrifices working for an organisation who genuinely cares about Environment.Furthermore, millennials demand using technology to improve efficiency and interestingly, regards career development more than money as the most important and rewarding aspect. By understanding the motivational factors of millennials, Leaders can be equipped to keep them engaged, motivated and highly productive, after all, they are not only the future, but are fast becoming the present.
- Full Text:
- Date Issued: 2020
- Authors: Walters, Ashraf
- Date: 2020
- Subjects: Automobile industry and trade -- South Africa , Employee motivation
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/50709 , vital:42388
- Description: Motivation in the workplace is the willingness of employees to exert high levels of effort in achieving the organisations goals and objectives. Motivation has been studied by psychologists and organisational experts throughout the ages and was consistently found that motivated employees provide organisations with improved productivity and a competitive edge. Millennials, born between the years of 1980 and 2000, are the biggest cohort since the baby boomer to enter the workplace. A significant amount of research was done on the characteristics of millennials but there is a limited amount of empirical research done on understanding and potentially improving motivation of millennials. The automotive industry is a key player and contributor to South Africa’s gross domestic product and employs a great number of people in direct and indirect jobs throughout the value chain. Against this backdrop, research was conducted within the automotive sector in the Gauteng and Eastern Cape (Nelson Mandela Bay) regions in South Africa aimed at exploring motivation under the context of leadership, communication, social responsibility, rewards and, given the tech savvy nature of millennials, the use of technology. This study was conducted under the positivistic paradigm, which employed a quantitative approach, by means of a questionnaire survey. The study and review of the literature by the researcher found that millennials value leadership which supports, and guides as oppose to enforces. Communication, which is transparent, concise but frequent. They are willing to make personal sacrifices working for an organisation who genuinely cares about Environment.Furthermore, millennials demand using technology to improve efficiency and interestingly, regards career development more than money as the most important and rewarding aspect. By understanding the motivational factors of millennials, Leaders can be equipped to keep them engaged, motivated and highly productive, after all, they are not only the future, but are fast becoming the present.
- Full Text:
- Date Issued: 2020
Exploring the perceptions of School Governing Bodies towards foundation phase male teachers in Eastern Cape schools
- Authors: Kagola, Obakeng
- Date: 2020
- Subjects: Male teachers -- South Africa , Primary school teaching -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/46239 , vital:39518
- Description: Since the adoption and implementation of the South African Schools Act of (1996), School Governing Bodies (SGBs) have been provided with the powers to recommend the employment of teachers in schools. Moreover, SGBs are also required to have an impact on the promotion of diversity in schools through the employment of teachers in a non-discriminatory way. However, two decades since SASA of 1996, Foundation Phase teaching remains dominated by females. Literature in the South African context posits that gendered schooling practices still exist in the differentiated opportunities of the employment of teachers. Particularly male teachers eager to teach in the foundation phase in the Eastern Cape, KwaZulu-Natal and North West Province. The study sought to explore the perceptions of SGB members towards foundation phase male teachers in the Eastern Cape schools. This study employed Participatory Visual Research Methodologies (PVRM), as its research design and was underpinned by the critical paradigm. It utilised a participatory method, collages and a focus group discussion to generate data with five SGB members from three purposively selected schools in the Eastern Cape. The study utilised a feminist post-structural theory in the analysis of findings. The findings revealed three themes, which are; (1) Males are not seen as good caregivers, (2) Foundation phase male teachers are seen as multifaceted and lastly (3) Male teachers are seen as not suitable for Foundation Phase teaching. Each of the above findings offers recommendations to the following stakeholders, the Department of Basic Education (DBE), Department of Higher Education and Training (DHET) and for future research.
- Full Text:
- Date Issued: 2020
- Authors: Kagola, Obakeng
- Date: 2020
- Subjects: Male teachers -- South Africa , Primary school teaching -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10948/46239 , vital:39518
- Description: Since the adoption and implementation of the South African Schools Act of (1996), School Governing Bodies (SGBs) have been provided with the powers to recommend the employment of teachers in schools. Moreover, SGBs are also required to have an impact on the promotion of diversity in schools through the employment of teachers in a non-discriminatory way. However, two decades since SASA of 1996, Foundation Phase teaching remains dominated by females. Literature in the South African context posits that gendered schooling practices still exist in the differentiated opportunities of the employment of teachers. Particularly male teachers eager to teach in the foundation phase in the Eastern Cape, KwaZulu-Natal and North West Province. The study sought to explore the perceptions of SGB members towards foundation phase male teachers in the Eastern Cape schools. This study employed Participatory Visual Research Methodologies (PVRM), as its research design and was underpinned by the critical paradigm. It utilised a participatory method, collages and a focus group discussion to generate data with five SGB members from three purposively selected schools in the Eastern Cape. The study utilised a feminist post-structural theory in the analysis of findings. The findings revealed three themes, which are; (1) Males are not seen as good caregivers, (2) Foundation phase male teachers are seen as multifaceted and lastly (3) Male teachers are seen as not suitable for Foundation Phase teaching. Each of the above findings offers recommendations to the following stakeholders, the Department of Basic Education (DBE), Department of Higher Education and Training (DHET) and for future research.
- Full Text:
- Date Issued: 2020
Exploring the privacy calculus on social networking services from a South African perspective
- Authors: Mathew, Boney George
- Date: 2020
- Subjects: Data encryption (Computer science) , Public key cryptography Online social networks -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MIT
- Identifier: http://hdl.handle.net/10948/46163 , vital:39510
- Description: Social Network Services (SNSs) have revolutionized the way we communicate, interact and present ourselves before others. The business model of SNS’S like Facebook is primarily based on SNS’S user self-disclosure of personal information. It is argued that the SNS’S user conducts a cost-benefit analysis before deciding to self-disclose their personal information, and this user behaviour forms the basis of the Privacy Calculus Theory. Enjoyment, Self-Presentation and Relationship Maintenance is considered as the benefits and the Privacy Concerns of the users is considered as the costs of disclosing personal information.As national or regional culture could influence SNS’S user self-disclosure behaviour, it would be advantageous for multinational SNS’S’s like Facebook to understand the perceptions of SNS’S user’s from different nationalities. Currently, no studies have been conducted amongst the South African (SA) SNSs’ users’ self-disclosure behaviour. This research is aimed at understanding the South African SNSs’ users’ perceptions regarding their perceived costs, benefits and selfdisclosure using the Privacy Calculus theory. This study is a replication of a similar study undertaken amongst the United States of America (US) and German SNS’S users. To remain competitive in the market and to sustain the viability of their business model, SNS like Facebook will have to encourage user self-disclosure. Studies have proven that national cultures play an important role on the nature and extent of user disclosure (Krasnova & Veltri, 2010; Lewis, Kaufman, & Christakis, 2008). However, no similar research has been undertaken in South Africa, and currently we do not understand South African SNS users’ self-disclosure behaviour in terms of the privacy calculus theory. The primary objective of this study is to understand the perceptions of South African SNS’S users regarding the perceived benefits, costs, moderating factors and self-disclosure, using the Privacy Calculus Theory. To achieve this objective, we initially undertook a detailed literature review to understand the concept of information privacy, privacy calculus, information privacy policy and legal framework, SNS’S and self-disclosure and the various factors affecting self-disclosure. We then proceeded to validate the theoretical framework by collecting data from two South African universities, namely the Nelson Mandela University (NMU) and Walter Sisulu University (WSU (NMD Campus – Former University of Transkei)), by adopting the same methodology and instrument used in the original study (and the isiXhosa translation). The theoretical framework used for this study is based on the Privacy Calculus theory, which argues that users conduct a cost-benefit calculus before deciding to self-disclose their personal information. This analysis is further influenced by other moderating factors like trust, control and awareness. All these factors have been incorporated into the theoretical framework and the instrument, adapted from the original research was used to collect data from the participants. The data from 239 respondents, who finally qualified for analysis was collated and proceeded with the analysis of that data. The data was analysed in four stages using established statistical tests. The first three phases were used to determine the actual value placed by the users on selfdisclosure, its determinants and moderating factors, and the last phase concentrated on how each of the constructs included in the theoretical framework influenced the other constructs. The results obtained from the analysis provided valuable insights into the self-disclosure behaviour of South African SNS’S users. Entertainment was the primary benefit the students derived from using SNS like Facebook, followed by relationship maintenance and those who enjoyed the platform more tended to Self-Disclose more. Those who tended to derive more benefits from the platform were found to trust the platform and the other users of the network. The theoretical framework was validated and it was determined that privacy paradox exists within the South African SNS’S user community, meaning that even with high privacy concerns, these SNS users are willing to self-disclose their personal information.
- Full Text:
- Date Issued: 2020
- Authors: Mathew, Boney George
- Date: 2020
- Subjects: Data encryption (Computer science) , Public key cryptography Online social networks -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MIT
- Identifier: http://hdl.handle.net/10948/46163 , vital:39510
- Description: Social Network Services (SNSs) have revolutionized the way we communicate, interact and present ourselves before others. The business model of SNS’S like Facebook is primarily based on SNS’S user self-disclosure of personal information. It is argued that the SNS’S user conducts a cost-benefit analysis before deciding to self-disclose their personal information, and this user behaviour forms the basis of the Privacy Calculus Theory. Enjoyment, Self-Presentation and Relationship Maintenance is considered as the benefits and the Privacy Concerns of the users is considered as the costs of disclosing personal information.As national or regional culture could influence SNS’S user self-disclosure behaviour, it would be advantageous for multinational SNS’S’s like Facebook to understand the perceptions of SNS’S user’s from different nationalities. Currently, no studies have been conducted amongst the South African (SA) SNSs’ users’ self-disclosure behaviour. This research is aimed at understanding the South African SNSs’ users’ perceptions regarding their perceived costs, benefits and selfdisclosure using the Privacy Calculus theory. This study is a replication of a similar study undertaken amongst the United States of America (US) and German SNS’S users. To remain competitive in the market and to sustain the viability of their business model, SNS like Facebook will have to encourage user self-disclosure. Studies have proven that national cultures play an important role on the nature and extent of user disclosure (Krasnova & Veltri, 2010; Lewis, Kaufman, & Christakis, 2008). However, no similar research has been undertaken in South Africa, and currently we do not understand South African SNS users’ self-disclosure behaviour in terms of the privacy calculus theory. The primary objective of this study is to understand the perceptions of South African SNS’S users regarding the perceived benefits, costs, moderating factors and self-disclosure, using the Privacy Calculus Theory. To achieve this objective, we initially undertook a detailed literature review to understand the concept of information privacy, privacy calculus, information privacy policy and legal framework, SNS’S and self-disclosure and the various factors affecting self-disclosure. We then proceeded to validate the theoretical framework by collecting data from two South African universities, namely the Nelson Mandela University (NMU) and Walter Sisulu University (WSU (NMD Campus – Former University of Transkei)), by adopting the same methodology and instrument used in the original study (and the isiXhosa translation). The theoretical framework used for this study is based on the Privacy Calculus theory, which argues that users conduct a cost-benefit calculus before deciding to self-disclose their personal information. This analysis is further influenced by other moderating factors like trust, control and awareness. All these factors have been incorporated into the theoretical framework and the instrument, adapted from the original research was used to collect data from the participants. The data from 239 respondents, who finally qualified for analysis was collated and proceeded with the analysis of that data. The data was analysed in four stages using established statistical tests. The first three phases were used to determine the actual value placed by the users on selfdisclosure, its determinants and moderating factors, and the last phase concentrated on how each of the constructs included in the theoretical framework influenced the other constructs. The results obtained from the analysis provided valuable insights into the self-disclosure behaviour of South African SNS’S users. Entertainment was the primary benefit the students derived from using SNS like Facebook, followed by relationship maintenance and those who enjoyed the platform more tended to Self-Disclose more. Those who tended to derive more benefits from the platform were found to trust the platform and the other users of the network. The theoretical framework was validated and it was determined that privacy paradox exists within the South African SNS’S user community, meaning that even with high privacy concerns, these SNS users are willing to self-disclose their personal information.
- Full Text:
- Date Issued: 2020
Exploring the role of HRM in the ministry of health’s decentralisation policy
- Authors: Cekwane, Thulane Johannes
- Date: 2020
- Subjects: Personnel management
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/47490 , vital:40127
- Description: According to Rigoli and Dussault (2003), HR in the health sectors are regarded as strategic actors and are not entirely involved in the delivery of health services. Morgan–Javis (2015) further maintains that in 2011 decentralisation was launched with a view to decentralise health services from the Ministry of Health (MOH) to the Ministry of Local Government and Chieftainship Affairs (MOLGCA). There has been increased attention on the restructuring process of the health sector reform but little priority has been given as to how to decentralise key human resources functions. A guiding policy was developed and endorsed in 2014, but still excludes how these human resources functions are to be decentralised. Centralised human resources services is an impediment in the transformation process of improved health care services for the Basotho Nation (Morgan–Javis, 2015).Ulrich’s (1998) HR model formed the theoretical model of study.This study aimed to explore how the Human Resources (HR) functions support the decentralisation in the Ministry of Health. Data was collected through in-depth interviews. The sample consisted ofall eight (8) Directors from the Ministry of Health. These Directors were knowledgeable about phenomenon being studied. Thematic analysis was used to examine the main theme.The data collected through interviews emerged into different categories of themes from the interview data set such as Conceptualising decentralisation, HR’s role, Employee buy-in and Decentralisation and implementation
- Full Text:
- Date Issued: 2020
- Authors: Cekwane, Thulane Johannes
- Date: 2020
- Subjects: Personnel management
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/47490 , vital:40127
- Description: According to Rigoli and Dussault (2003), HR in the health sectors are regarded as strategic actors and are not entirely involved in the delivery of health services. Morgan–Javis (2015) further maintains that in 2011 decentralisation was launched with a view to decentralise health services from the Ministry of Health (MOH) to the Ministry of Local Government and Chieftainship Affairs (MOLGCA). There has been increased attention on the restructuring process of the health sector reform but little priority has been given as to how to decentralise key human resources functions. A guiding policy was developed and endorsed in 2014, but still excludes how these human resources functions are to be decentralised. Centralised human resources services is an impediment in the transformation process of improved health care services for the Basotho Nation (Morgan–Javis, 2015).Ulrich’s (1998) HR model formed the theoretical model of study.This study aimed to explore how the Human Resources (HR) functions support the decentralisation in the Ministry of Health. Data was collected through in-depth interviews. The sample consisted ofall eight (8) Directors from the Ministry of Health. These Directors were knowledgeable about phenomenon being studied. Thematic analysis was used to examine the main theme.The data collected through interviews emerged into different categories of themes from the interview data set such as Conceptualising decentralisation, HR’s role, Employee buy-in and Decentralisation and implementation
- Full Text:
- Date Issued: 2020
Factors in the school context that enhance resilience in high school learners from socio-economically challenged backgrounds
- Authors: Mzini, Yondela
- Date: 2020
- Subjects: Education, Secondary
- Language: English
- Type: Thesis , Masters , MSW
- Identifier: http://hdl.handle.net/10948/46428 , vital:39586
- Description: School is a rich source of information about the world, history, nature and its phenomena. Learning is an important part in young people lives and it begins at school. A young person can learn various subjects and facts in schools that would be life-long remembered. Schools can thus be regarded as an important instrument contributing to the positive development of young people.These young people are born into families and in addition to the school the family is regarded as the basic source of strength, nurturance and support for its individual members as well as ensuring stability and generational continuity. Families also play a key role in the development of young people. However, many families struggle with socio-economic issues like poverty, substance abuse and conflict amongst parents and caregivers. The focus of this study is on factors within the school environment that enhance the resilience of high school learnerswhere their experiences of the family’s less than ideal socio-economic situation and challenges create barriers to learning. Literature shows that the school is a place where learners spend the largest portion of their time per day. When learners leave homeforschool, they become the responsibility of the teacher. Teachers in high schools are thus challenged to facilitatereal support to vast number of learners who facedifficult issues in their personal lives. The researcher was interested to know what these young people regard as the factors in school that enhance their resilience despite difficult family circumstances. This study employed a qualitative research approach, embedded in an explorative anddescriptive research design.The sample of the study was drawn from young people who have successfully completed high school. A non-probability, volunteer sampling technique wasemployed to recruit ten young people. They were interviewed using semi-structured interviews. The research ethics such as voluntary participation, informed consent, confidentiality and principle of no harm to participants were adhered to. To ensure the trustworthiness of the data, the researcher observed aspects of credibility, transferability, dependability and conformability. The findings of the study couldcontribute to local knowledge and an increased understanding of aspects of the school that supportresilience-building for young people from challenging circumstances. Young people interviewed in the study came from backgrounds where they experienced various socio-economic challenges, they were able to reflect on strengths in their family systems, personal strengths and how it influences their choices. They also spoke about the positive role the school played in building their resilience and made valuable contributions about how the school can be responsive to students with varying strength-sets.
- Full Text:
- Date Issued: 2020
- Authors: Mzini, Yondela
- Date: 2020
- Subjects: Education, Secondary
- Language: English
- Type: Thesis , Masters , MSW
- Identifier: http://hdl.handle.net/10948/46428 , vital:39586
- Description: School is a rich source of information about the world, history, nature and its phenomena. Learning is an important part in young people lives and it begins at school. A young person can learn various subjects and facts in schools that would be life-long remembered. Schools can thus be regarded as an important instrument contributing to the positive development of young people.These young people are born into families and in addition to the school the family is regarded as the basic source of strength, nurturance and support for its individual members as well as ensuring stability and generational continuity. Families also play a key role in the development of young people. However, many families struggle with socio-economic issues like poverty, substance abuse and conflict amongst parents and caregivers. The focus of this study is on factors within the school environment that enhance the resilience of high school learnerswhere their experiences of the family’s less than ideal socio-economic situation and challenges create barriers to learning. Literature shows that the school is a place where learners spend the largest portion of their time per day. When learners leave homeforschool, they become the responsibility of the teacher. Teachers in high schools are thus challenged to facilitatereal support to vast number of learners who facedifficult issues in their personal lives. The researcher was interested to know what these young people regard as the factors in school that enhance their resilience despite difficult family circumstances. This study employed a qualitative research approach, embedded in an explorative anddescriptive research design.The sample of the study was drawn from young people who have successfully completed high school. A non-probability, volunteer sampling technique wasemployed to recruit ten young people. They were interviewed using semi-structured interviews. The research ethics such as voluntary participation, informed consent, confidentiality and principle of no harm to participants were adhered to. To ensure the trustworthiness of the data, the researcher observed aspects of credibility, transferability, dependability and conformability. The findings of the study couldcontribute to local knowledge and an increased understanding of aspects of the school that supportresilience-building for young people from challenging circumstances. Young people interviewed in the study came from backgrounds where they experienced various socio-economic challenges, they were able to reflect on strengths in their family systems, personal strengths and how it influences their choices. They also spoke about the positive role the school played in building their resilience and made valuable contributions about how the school can be responsive to students with varying strength-sets.
- Full Text:
- Date Issued: 2020
Factors influencing organisational commitment amongst generation Z in South Africa
- Authors: Masia, Thapelo
- Date: 2020
- Subjects: Staff Retention -- South Africa , Young adults -- Employment -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/50294 , vital:42093
- Description: In a world of constant change, organisations face demanding pressures and challenges. Now, more than ever, organisations need to optimise resources in maximising outcomes in order to maintain a competitive advantage. In doing so, it must be acknowledged that people remain the most valuable resource in achieving organisational success. This has led to a war for talent across and between organisations. In South Africa this situation is complicated for many reasons, including the fact that there is a skills shortage crisis faced in South Africa and because many experienced Baby Boomers are now reaching retirement age. This time is also marked by the entry of the newest member of the workforce, this being Generation Z. These considerations make it important for organisations to create relevant strategies to build and retain the organisational commitment of top talent, more specifically that of Generation Z. Organisational commitment is a key organisational consideration in driving employee behaviour and attitude through influencing performance, satisfaction, organisational citizenship and motivation. The aim of this study was to explore the factors influencing organisational commitment amongst Generation Z employees in the South African workplace. This is important in assisting organisations in developing and enhancing attraction and retention strategies for current and future talent.
- Full Text:
- Date Issued: 2020
- Authors: Masia, Thapelo
- Date: 2020
- Subjects: Staff Retention -- South Africa , Young adults -- Employment -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/50294 , vital:42093
- Description: In a world of constant change, organisations face demanding pressures and challenges. Now, more than ever, organisations need to optimise resources in maximising outcomes in order to maintain a competitive advantage. In doing so, it must be acknowledged that people remain the most valuable resource in achieving organisational success. This has led to a war for talent across and between organisations. In South Africa this situation is complicated for many reasons, including the fact that there is a skills shortage crisis faced in South Africa and because many experienced Baby Boomers are now reaching retirement age. This time is also marked by the entry of the newest member of the workforce, this being Generation Z. These considerations make it important for organisations to create relevant strategies to build and retain the organisational commitment of top talent, more specifically that of Generation Z. Organisational commitment is a key organisational consideration in driving employee behaviour and attitude through influencing performance, satisfaction, organisational citizenship and motivation. The aim of this study was to explore the factors influencing organisational commitment amongst Generation Z employees in the South African workplace. This is important in assisting organisations in developing and enhancing attraction and retention strategies for current and future talent.
- Full Text:
- Date Issued: 2020
Financial inclusion and food security nexus: Evidence from Southern African Development Community (SADC)
- Authors: Machili, Tharollo
- Date: 2020
- Subjects: Economic growth, development, planning , Finance -- Developing countries
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/49886 , vital:41813
- Description: Everywhere on the African continent, governments are starting to realize the crucial role of financial inclusion in mitigating poverty and contributing to sustainable and inclusive economic development and stability. Emerging evidence indicates that financial sector deepening is essential for facilitating economic development. The 2016 SADC financial inclusion strategy asserts that inclusive economic growth has a positive impact on the needy through minimizing income inequality and increasing employment Finmark Trust (2016). Recent developments in financial services for the low-income segment, specifically, reveals how financial inclusion can strengthen the dependence of a vulnerable and excluded population (Demirgüç-Kunt, Klapper, Singer, Ansar and Hess, 2017). As such, many countries within the continent now have national financial inclusion strategies and lead core initiatives to enhance financial markets. A number of researcher’s stress that financial inclusion, especially the use of digital financial services and mobile money services, can have developmental benefits Although studies fail to concur on the direction of the effect that financial inclusion has on economic development. It is worth noting that, even studies that do not find any evidence of the relationship between financial inclusion and economic development to support this hypothesis, also emphasize the prospect of attaining better outcomes through careful consideration of local needs
- Full Text:
- Date Issued: 2020
- Authors: Machili, Tharollo
- Date: 2020
- Subjects: Economic growth, development, planning , Finance -- Developing countries
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/49886 , vital:41813
- Description: Everywhere on the African continent, governments are starting to realize the crucial role of financial inclusion in mitigating poverty and contributing to sustainable and inclusive economic development and stability. Emerging evidence indicates that financial sector deepening is essential for facilitating economic development. The 2016 SADC financial inclusion strategy asserts that inclusive economic growth has a positive impact on the needy through minimizing income inequality and increasing employment Finmark Trust (2016). Recent developments in financial services for the low-income segment, specifically, reveals how financial inclusion can strengthen the dependence of a vulnerable and excluded population (Demirgüç-Kunt, Klapper, Singer, Ansar and Hess, 2017). As such, many countries within the continent now have national financial inclusion strategies and lead core initiatives to enhance financial markets. A number of researcher’s stress that financial inclusion, especially the use of digital financial services and mobile money services, can have developmental benefits Although studies fail to concur on the direction of the effect that financial inclusion has on economic development. It is worth noting that, even studies that do not find any evidence of the relationship between financial inclusion and economic development to support this hypothesis, also emphasize the prospect of attaining better outcomes through careful consideration of local needs
- Full Text:
- Date Issued: 2020
Flammability of indigenous and invasive alien woody plants in coastal fynbos and thicket
- Msweli, Samukelisiwe Tholakele, Potts, Alastair J
- Authors: Msweli, Samukelisiwe Tholakele , Potts, Alastair J
- Date: 2020
- Subjects: Forest fires -- Environmental aspects , Forest fires -- Prevention and control
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/45875 , vital:39313
- Description: Globally, extreme fires have become more common in wildland-urban interface areas, and more recently, along the southern Cape coast of South Africa. The 2017 Knysna fires prompted greater understanding of the flammability of, and the fire risk posed by, different vegetation groups, which is essential to develop fire risk mitigation strategies. In this study, I experimentally assessed flammability of 30 woody plant species from the vegetation groups indigenous fynbos, thicket, and invasive alien plants (IAPs) that occur along the southern Cape coast. Live plant shoots were sampled across varying fire weather conditions and burnt experimentally to measure flammability in relation to fire weather conditions, fuel moisture, and fuel load. Flammability measures considered were: burn intensity, completeness of burn, time-to-ignition, and the likelihood of spontaneous ignition. I further assessed the flammability of partially dried plant material as a crude proxy for drought effects, to ascertain whether drying of fuels would differentially affect the flammability of the vegetation groups. I used generalized linear mixed-effects models to assess flammability measures in relation to the predictor variables: fire weather, fuel moisture, fuel load, vegetation groups, and species (as a random factor). Results showed that increasing severity of fire weather significantly increased flammability through increasing burn intensity, increasing completeness of burn, increasing the likelihood of spontaneous ignition, and also reducing time-to-ignition. Increasing fuel moisture significantly decreased burn intensity, completeness of burn, and the likelihood of spontaneous ignition. Fuel load significantly increased burn intensity and time-to-ignition. Flammability was highest in IAPs, intermediate in fynbos, and lowest in thicket. IAPs and fynbos showed significantly higher ignitability, and thus present risks under moderate and high fire weather conditions, whereas thicket presents lower risks under low and moderate fire weather conditions. The drying out of fuels considerably increased flammability equally in the three vegetation groups, and by implication, fire risk due to an increase in dead:live ratio. Flammability was furthermore assessed in relation to fuel traits, i.e. the proportion of fine fuels, coarse fuels, and dead fuels, fuel bed porosity, fuel load, and fuel moisture, using multiple regression analysis and stepwise selection of factors. This revealed that fuel moisture was the most important factor affecting flammability in terms of all the flammability measures. Results further showed that the increase in v the proportions of fine fuels increased flammability by increasing completeness of burn. Lastly, vegetation groups were compared (using Kruskal Wallis) in terms of their flammability and fuel traits. I found that fynbos and IAPs exhibited greater flammability on account of higher completeness of burn and more rapid ignition than thicket species, but no clear distinction was evident between fynbos and IAPs. Fynbos’ high flammability was attributed to high proportions of fine and porous fuels. Thicket’s low flammability was attributed to high proportions of coarse and dense fuels. Little distinction in fuel traits could be made between fynbos and IAPs, except that fynbos had a greater proportion of fine fuels. There is a potential risk posed by the IAPs in terms of increased flammability and fire severity, on an indigenous landscape that is invaded. Fire managers need to encourage the prioritization of the management of IAPs that present high flammability as an attempt to reduce fire risk along the southern Cape coast of South Africa.
- Full Text:
- Date Issued: 2020
- Authors: Msweli, Samukelisiwe Tholakele , Potts, Alastair J
- Date: 2020
- Subjects: Forest fires -- Environmental aspects , Forest fires -- Prevention and control
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/45875 , vital:39313
- Description: Globally, extreme fires have become more common in wildland-urban interface areas, and more recently, along the southern Cape coast of South Africa. The 2017 Knysna fires prompted greater understanding of the flammability of, and the fire risk posed by, different vegetation groups, which is essential to develop fire risk mitigation strategies. In this study, I experimentally assessed flammability of 30 woody plant species from the vegetation groups indigenous fynbos, thicket, and invasive alien plants (IAPs) that occur along the southern Cape coast. Live plant shoots were sampled across varying fire weather conditions and burnt experimentally to measure flammability in relation to fire weather conditions, fuel moisture, and fuel load. Flammability measures considered were: burn intensity, completeness of burn, time-to-ignition, and the likelihood of spontaneous ignition. I further assessed the flammability of partially dried plant material as a crude proxy for drought effects, to ascertain whether drying of fuels would differentially affect the flammability of the vegetation groups. I used generalized linear mixed-effects models to assess flammability measures in relation to the predictor variables: fire weather, fuel moisture, fuel load, vegetation groups, and species (as a random factor). Results showed that increasing severity of fire weather significantly increased flammability through increasing burn intensity, increasing completeness of burn, increasing the likelihood of spontaneous ignition, and also reducing time-to-ignition. Increasing fuel moisture significantly decreased burn intensity, completeness of burn, and the likelihood of spontaneous ignition. Fuel load significantly increased burn intensity and time-to-ignition. Flammability was highest in IAPs, intermediate in fynbos, and lowest in thicket. IAPs and fynbos showed significantly higher ignitability, and thus present risks under moderate and high fire weather conditions, whereas thicket presents lower risks under low and moderate fire weather conditions. The drying out of fuels considerably increased flammability equally in the three vegetation groups, and by implication, fire risk due to an increase in dead:live ratio. Flammability was furthermore assessed in relation to fuel traits, i.e. the proportion of fine fuels, coarse fuels, and dead fuels, fuel bed porosity, fuel load, and fuel moisture, using multiple regression analysis and stepwise selection of factors. This revealed that fuel moisture was the most important factor affecting flammability in terms of all the flammability measures. Results further showed that the increase in v the proportions of fine fuels increased flammability by increasing completeness of burn. Lastly, vegetation groups were compared (using Kruskal Wallis) in terms of their flammability and fuel traits. I found that fynbos and IAPs exhibited greater flammability on account of higher completeness of burn and more rapid ignition than thicket species, but no clear distinction was evident between fynbos and IAPs. Fynbos’ high flammability was attributed to high proportions of fine and porous fuels. Thicket’s low flammability was attributed to high proportions of coarse and dense fuels. Little distinction in fuel traits could be made between fynbos and IAPs, except that fynbos had a greater proportion of fine fuels. There is a potential risk posed by the IAPs in terms of increased flammability and fire severity, on an indigenous landscape that is invaded. Fire managers need to encourage the prioritization of the management of IAPs that present high flammability as an attempt to reduce fire risk along the southern Cape coast of South Africa.
- Full Text:
- Date Issued: 2020
Food and Nihilism :a Nietzschean and Deleuzian exploration of contemporary dominant food discourses
- Authors: Du Plessis, Karen
- Date: 2020
- Subjects: Nihilism (Philosophy) -- History , Food culture -- Religious Aspects
- Language: English
- Type: Thesis , Masters , DPhil
- Identifier: http://hdl.handle.net/10948/46870 , vital:39718
- Description: This study is based on the proposition that the respective philosophies of Nietzsche and Deleuze, including his collaborative work with Guattari, provide a way to rethink the underlying structures that inform ways of thinking about food and eating. In Nietzschean and Deleuzian terms, many of the dominant ways that humans currently think about food and eating are fraught with multiple anxieties that lead to passivity and despair, as well as obsessive concerns and feelings of guilt. This can be understood as various ways to say No to life and to difference‘. For the sake of overcoming (or at least addressing) such forms of eating-related nihilism, or life-denying attitudes, I argue that there is an urgent need for philosophical research that deals critically with the underlying food values‘ that lead to contemporary nihilistic ways of thinking about food. Further, I argue that critiquing contemporary dominant nihilistic food discourses and values from a Deleuzian and Nietzschean perspective, as well as exploring what produces nihilism, opens up Avenues/possibilities for shifts in approaching the problem of food and eating in a more life-affirming way. Specifically, Nietzsche‘s work on active and reactive forces, coupled with Deleuze and Guattari‘s account of concepts, allows for an exploration of what a starting point for overcoming nihilism might look like. In this case I argue that in order to think in a new way about the different aspects of eating, a more life-affirming and active concept of a body‘ should be produced.
- Full Text:
- Date Issued: 2020
- Authors: Du Plessis, Karen
- Date: 2020
- Subjects: Nihilism (Philosophy) -- History , Food culture -- Religious Aspects
- Language: English
- Type: Thesis , Masters , DPhil
- Identifier: http://hdl.handle.net/10948/46870 , vital:39718
- Description: This study is based on the proposition that the respective philosophies of Nietzsche and Deleuze, including his collaborative work with Guattari, provide a way to rethink the underlying structures that inform ways of thinking about food and eating. In Nietzschean and Deleuzian terms, many of the dominant ways that humans currently think about food and eating are fraught with multiple anxieties that lead to passivity and despair, as well as obsessive concerns and feelings of guilt. This can be understood as various ways to say No to life and to difference‘. For the sake of overcoming (or at least addressing) such forms of eating-related nihilism, or life-denying attitudes, I argue that there is an urgent need for philosophical research that deals critically with the underlying food values‘ that lead to contemporary nihilistic ways of thinking about food. Further, I argue that critiquing contemporary dominant nihilistic food discourses and values from a Deleuzian and Nietzschean perspective, as well as exploring what produces nihilism, opens up Avenues/possibilities for shifts in approaching the problem of food and eating in a more life-affirming way. Specifically, Nietzsche‘s work on active and reactive forces, coupled with Deleuze and Guattari‘s account of concepts, allows for an exploration of what a starting point for overcoming nihilism might look like. In this case I argue that in order to think in a new way about the different aspects of eating, a more life-affirming and active concept of a body‘ should be produced.
- Full Text:
- Date Issued: 2020
Friction stir welding of thin section aluminium extrusions for marine applications
- Authors: Chikamhi, Prince Philhelene
- Date: 2020
- Subjects: Friction welding , Welding
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/46030 , vital:39410
- Description: This dissertation focuses on the development of a welding extrusion feeder, tool and schedule for implementation of defect-free butt welds on long, thin and complex-shape aluminium extrusions, as used by the marine industry. Viability of employing Friction Stir Welding (FSW) as a welding technology for joining long extrusions with a short-bed and bolt-on feeder to facilitate onsite fabrication of flat structures in shipbuilding is evaluated. An FSW feeder, tool and process control unit were designed, developed and integrated with an existing FSW platform, to facilitate implementation of continuous welds. Weld data acquired from literature review, experimentation, mechanical testing and metallographic analysis was used in design considerations for the development of a feeder. Subsequently, butt welds were implemented successfully on long 3 mm AA6082-T6 extrusions, during continuous FSW on the feeder. A specially adapted tool, the Floating Bobbin Tool, used with the feeder to implement butt welds was designed and developed from literature tool heuristics and weld trials. The tool eliminated the need for a backing bar and enabled tool-workpiece auto-alignment, beneficial with thin-section extrusions. Effect of rotational and weld speed and tool geometry of two tools (Tool 1 and 2), on weld forces and quality was tested, to establish optimum parameters for attaining high quality welds. Tool geometry had a profound effect on weld forces and integrity; Tool 2 welds exhibited superior and consistent weld quality, meeting maritime rules and standards and proving the adequacy of using FSW for joining long thin extrusions. Feeder process control, automation and optimisation, was implemented by process control unit devices, in addition to force and position control provided by the existing FSW platform. Owing to process control, automation and optimisation during continuous FSW of thin long and complex-shape aluminium extrusions, welding setup times and process variations are minimised and chances for defect-free welds increased, boosting production and cost savings in large panel fabrication in shipbuilding.
- Full Text:
- Date Issued: 2020
- Authors: Chikamhi, Prince Philhelene
- Date: 2020
- Subjects: Friction welding , Welding
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/46030 , vital:39410
- Description: This dissertation focuses on the development of a welding extrusion feeder, tool and schedule for implementation of defect-free butt welds on long, thin and complex-shape aluminium extrusions, as used by the marine industry. Viability of employing Friction Stir Welding (FSW) as a welding technology for joining long extrusions with a short-bed and bolt-on feeder to facilitate onsite fabrication of flat structures in shipbuilding is evaluated. An FSW feeder, tool and process control unit were designed, developed and integrated with an existing FSW platform, to facilitate implementation of continuous welds. Weld data acquired from literature review, experimentation, mechanical testing and metallographic analysis was used in design considerations for the development of a feeder. Subsequently, butt welds were implemented successfully on long 3 mm AA6082-T6 extrusions, during continuous FSW on the feeder. A specially adapted tool, the Floating Bobbin Tool, used with the feeder to implement butt welds was designed and developed from literature tool heuristics and weld trials. The tool eliminated the need for a backing bar and enabled tool-workpiece auto-alignment, beneficial with thin-section extrusions. Effect of rotational and weld speed and tool geometry of two tools (Tool 1 and 2), on weld forces and quality was tested, to establish optimum parameters for attaining high quality welds. Tool geometry had a profound effect on weld forces and integrity; Tool 2 welds exhibited superior and consistent weld quality, meeting maritime rules and standards and proving the adequacy of using FSW for joining long thin extrusions. Feeder process control, automation and optimisation, was implemented by process control unit devices, in addition to force and position control provided by the existing FSW platform. Owing to process control, automation and optimisation during continuous FSW of thin long and complex-shape aluminium extrusions, welding setup times and process variations are minimised and chances for defect-free welds increased, boosting production and cost savings in large panel fabrication in shipbuilding.
- Full Text:
- Date Issued: 2020