Synthesis of cannibigerol, an antibiotic for methycillin resistant staphylococcus aureus, in continuous flow system
- Authors: Koeberg, Bryce
- Date: 2022-04
- Subjects: Drug resistance in microorganisms , Cannabis-- Therapeutic use --South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55866 , vital:54395
- Description: This study focuses on the development of a synthetic version of the cannabinoid cannabigerol (CBG) through continuous flow systems. The compound has exhibited antibiotic properties that have been proven to be a potent killer of gram-positive methicillin-resistant Staphylococcus aureus that drive repeat infections. The cannabinoid kills the superbug by disrupting the cell wall integrity of cells that are drug resistant. Research suggests that CBG is not effective against gram-negative multi-drug resistant bacteria. However, when CBG is administered with polymyxin B, an antibiotic that disrupts the outer membrane of gram-negative bacteria the cannabinoid compound wipes out the drug-resistant gram-negative bacteria, thus revealing the extensive medicinal potential of cannabigerol. Cannabinoids, such as CBG, are present in low yields in the plant, depending on the extraction method, usually less than 5% in most strains. Natural medicines have a low amount of active ingredients due to the lab intensive and time-consuming extraction and isolation process; this has hindered the application of natural products in drug development. A major health concern of the human consumption of cannabis plant extracted cannabinoids is that the plant may be contaminated with microbes, heavy metals and pesticides due to the lack of regulation. Thus, it is proposed that these cannabinoids are synthetically produced through the integration of microfluidic technology, eliminating the presence of pesticides, microbes and heavy metals. The proposed method would even further speed up the rate of production at a lowered cost, produce greater yields of the product compared to extraction procedures / in batch reactions and improve the purity of cannabinoid compounds. This was achieved in flow chemistry whereby the key intermediates (olivetol, a derivative of methyl 6-n-pentyl-2-hydroxy-4-oxo-cyclohex 2-ene-l-carboxylate and cannabigerol) were produced at high conversions (67%, 100% and 34% respectively) in LTF glass microreactors. Cannabigerol was successfully synthesized in flow at high yields compared to literature, however, it was further discovered that the formation of side products was a hindrance to further improvement of the obtained yield in flow. , Thesis (MSc) -- Faculty of Science, School of Biomecular and Chemical Sciences, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Koeberg, Bryce
- Date: 2022-04
- Subjects: Drug resistance in microorganisms , Cannabis-- Therapeutic use --South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55866 , vital:54395
- Description: This study focuses on the development of a synthetic version of the cannabinoid cannabigerol (CBG) through continuous flow systems. The compound has exhibited antibiotic properties that have been proven to be a potent killer of gram-positive methicillin-resistant Staphylococcus aureus that drive repeat infections. The cannabinoid kills the superbug by disrupting the cell wall integrity of cells that are drug resistant. Research suggests that CBG is not effective against gram-negative multi-drug resistant bacteria. However, when CBG is administered with polymyxin B, an antibiotic that disrupts the outer membrane of gram-negative bacteria the cannabinoid compound wipes out the drug-resistant gram-negative bacteria, thus revealing the extensive medicinal potential of cannabigerol. Cannabinoids, such as CBG, are present in low yields in the plant, depending on the extraction method, usually less than 5% in most strains. Natural medicines have a low amount of active ingredients due to the lab intensive and time-consuming extraction and isolation process; this has hindered the application of natural products in drug development. A major health concern of the human consumption of cannabis plant extracted cannabinoids is that the plant may be contaminated with microbes, heavy metals and pesticides due to the lack of regulation. Thus, it is proposed that these cannabinoids are synthetically produced through the integration of microfluidic technology, eliminating the presence of pesticides, microbes and heavy metals. The proposed method would even further speed up the rate of production at a lowered cost, produce greater yields of the product compared to extraction procedures / in batch reactions and improve the purity of cannabinoid compounds. This was achieved in flow chemistry whereby the key intermediates (olivetol, a derivative of methyl 6-n-pentyl-2-hydroxy-4-oxo-cyclohex 2-ene-l-carboxylate and cannabigerol) were produced at high conversions (67%, 100% and 34% respectively) in LTF glass microreactors. Cannabigerol was successfully synthesized in flow at high yields compared to literature, however, it was further discovered that the formation of side products was a hindrance to further improvement of the obtained yield in flow. , Thesis (MSc) -- Faculty of Science, School of Biomecular and Chemical Sciences, 2022
- Full Text:
- Date Issued: 2022-04
The application of a simple decision support system to address water quality contestations in the Vaal Barrage catchment, South Africa
- Authors: Chili, Asanda Sandra
- Date: 2022-04
- Subjects: Vaal Barrage (South Africa : Reservoir) , Decision support systems South Africa Vaal Barrage (Reservoir) , Water Pollution Law and legislation South Africa , Water quality South Africa Vaal Barrage (Reservoir) , Water use Law and legislation South Africa Vaal Barrage (Reservoir) , Urban watersheds South Africa Vaal Barrage (Reservoir) , Watershed management South Africa Vaal Barrage (Reservoir) , Water use licences(WUL)
- Language: English
- Type: Master's thesis , text
- Identifier: http://hdl.handle.net/10962/232204 , vital:49971
- Description: Deteriorating environmental water quality is one of the complex challenges in South Africa that threaten freshwater ecosystem health and functionality. An emerging concern is the contestation of water quality regulatory instruments such as standards in water use licences (WUL), and the resource quality objectives. In the Vaal Barrage catchment where this study was undertaken these contestations were evident, suggesting the need for both technical and social solutions to water quality changes in socio-ecological systems. The Vaal Barrage catchment within the lower section of the Upper Vaal is a highly developed, urbanised, and complex catchment supporting and contributing to the social-economic development of Gauteng Province and the entire country, as the Upper Vaal contribute 20% to the Gross Domestic Product of South Africa. This study explores the motivations for stakeholders’ contestations of water quality regulatory instruments in order to contribute to ways in which water resource users and regulators can collaboratively address water quality challenges in the Vaal Barrage catchment. The study also explores water quality scenarios and their ecological and management implications. Document analysis, participant observations and a semi-structured questionnaire were deployed to explore stakeholders’ motivations, values, and perceptions of the water quality regulatory instruments. The results were triangulated to gain better insights into research participants responses. To explore water quality management scenarios, the study applied a water quality systems assessment model Decision Support System (DSS). The DSS was recently developed as part of a bigger project within the Vaal Barrage catchment. Regarding stakeholders’ motivation for contesting water quality regulatory instruments in the catchment, the results revealed a perceived lack of scientific credibility and defensibility in the processes used for deriving standards in WUL, a lack of transparent linkage between the WUL and resource quality objectives, and the increased need for stakeholder engagement in the resource quality objective formulation process. Furthermore, the study revealed punitive measures, education and awareness, self-regulation as mechanisms to encourage compliance. The applied DSS results showed that high nutrient loads, sulphate and total dissolved solids sourced from upstream catchments contribute to water quality deterioration in the Vaal Barrage catchment. The results also showed that the Vaal Barrage catchment could not host additional licence emitters because of TDS, phosphate and nitrate levels, which pose a serious risk to the ecology of the Vaal Barrage catchment, indicating that system had exceeded its assimilative capacity for critical water quality variables. Lastly, the results evidenced the need for collaborative action by the waste emitters within the Vaal Barrage catchment, particularly collaboration between upstream and downstream waste emitters. The study has far-reaching implications for water quality management in South Africa. These include i) the need for transparent and open processes and methods for deriving standards in water use licence, ii) the need for a water quality DSS that recognises catchment hydrological complexity in deriving standards in WUL, and for linking WUL and Resource Quality Objectives (RQOs), iii) collaboration between resources users, and between the resources users and the regulators to bring pollution to acceptable levels and iv) both social and technical solutions are necessary for managing water quality challenge, particularly in a highly developed catchment such as the Vaal Barrage system. , Thesis (MSc) -- Faculty of Science, Institute for Water Research, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Chili, Asanda Sandra
- Date: 2022-04
- Subjects: Vaal Barrage (South Africa : Reservoir) , Decision support systems South Africa Vaal Barrage (Reservoir) , Water Pollution Law and legislation South Africa , Water quality South Africa Vaal Barrage (Reservoir) , Water use Law and legislation South Africa Vaal Barrage (Reservoir) , Urban watersheds South Africa Vaal Barrage (Reservoir) , Watershed management South Africa Vaal Barrage (Reservoir) , Water use licences(WUL)
- Language: English
- Type: Master's thesis , text
- Identifier: http://hdl.handle.net/10962/232204 , vital:49971
- Description: Deteriorating environmental water quality is one of the complex challenges in South Africa that threaten freshwater ecosystem health and functionality. An emerging concern is the contestation of water quality regulatory instruments such as standards in water use licences (WUL), and the resource quality objectives. In the Vaal Barrage catchment where this study was undertaken these contestations were evident, suggesting the need for both technical and social solutions to water quality changes in socio-ecological systems. The Vaal Barrage catchment within the lower section of the Upper Vaal is a highly developed, urbanised, and complex catchment supporting and contributing to the social-economic development of Gauteng Province and the entire country, as the Upper Vaal contribute 20% to the Gross Domestic Product of South Africa. This study explores the motivations for stakeholders’ contestations of water quality regulatory instruments in order to contribute to ways in which water resource users and regulators can collaboratively address water quality challenges in the Vaal Barrage catchment. The study also explores water quality scenarios and their ecological and management implications. Document analysis, participant observations and a semi-structured questionnaire were deployed to explore stakeholders’ motivations, values, and perceptions of the water quality regulatory instruments. The results were triangulated to gain better insights into research participants responses. To explore water quality management scenarios, the study applied a water quality systems assessment model Decision Support System (DSS). The DSS was recently developed as part of a bigger project within the Vaal Barrage catchment. Regarding stakeholders’ motivation for contesting water quality regulatory instruments in the catchment, the results revealed a perceived lack of scientific credibility and defensibility in the processes used for deriving standards in WUL, a lack of transparent linkage between the WUL and resource quality objectives, and the increased need for stakeholder engagement in the resource quality objective formulation process. Furthermore, the study revealed punitive measures, education and awareness, self-regulation as mechanisms to encourage compliance. The applied DSS results showed that high nutrient loads, sulphate and total dissolved solids sourced from upstream catchments contribute to water quality deterioration in the Vaal Barrage catchment. The results also showed that the Vaal Barrage catchment could not host additional licence emitters because of TDS, phosphate and nitrate levels, which pose a serious risk to the ecology of the Vaal Barrage catchment, indicating that system had exceeded its assimilative capacity for critical water quality variables. Lastly, the results evidenced the need for collaborative action by the waste emitters within the Vaal Barrage catchment, particularly collaboration between upstream and downstream waste emitters. The study has far-reaching implications for water quality management in South Africa. These include i) the need for transparent and open processes and methods for deriving standards in water use licence, ii) the need for a water quality DSS that recognises catchment hydrological complexity in deriving standards in WUL, and for linking WUL and Resource Quality Objectives (RQOs), iii) collaboration between resources users, and between the resources users and the regulators to bring pollution to acceptable levels and iv) both social and technical solutions are necessary for managing water quality challenge, particularly in a highly developed catchment such as the Vaal Barrage system. , Thesis (MSc) -- Faculty of Science, Institute for Water Research, 2022
- Full Text:
- Date Issued: 2022-04
The application of the prescription act in labour disputes
- Authors: Mncanca, Siyamthanda
- Date: 2022-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55498 , vital:52375
- Description: It is inevitable that in an employment relationship grievances and conflicts may emerge.1 This is attested to by the large volume of 193 732 disputes that were referred to the Commission for Conciliation, Mediation and Arbitration (CCMA) during the 2018/19 financial year.2 In the event where an employee is dismissed from work and he decides to challenge the dismissal, section 191 of the Labour Relations Act (LRA) grants the employee a right to refer the matter to the CCMA for conciliation or arbitration.3 The purpose of referring the disputes to the CCMA is to support an establishment of a voluntary, free of charge and expeditious mechanisms for labour disputes settlement and allow parties to resolve their disputes through a consensus based process before taking the route of a court process.4 There are time frames that are provided for the referral of disputes to the CCMA. Section 191 determines these time frames by stating that an employee must refer their alleged unfair dismissal to the CCMA within 30 days or 90 days when a dispute relates to an unfair labour practice in accordance with section 191(1)(b)(ii) of the LRA.5 The rationale behind these time frames was outlined in the Constitutional Court (CC) judgement of Toyota SA Motors (Pty) Ltd v CCMA,6 as a means to bring about the expeditious resolution of labour disputes which by their nature, require speedy resolution. , Thesis (L.L.M.) -- Faculty of Law, Mercantile Law, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Mncanca, Siyamthanda
- Date: 2022-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55498 , vital:52375
- Description: It is inevitable that in an employment relationship grievances and conflicts may emerge.1 This is attested to by the large volume of 193 732 disputes that were referred to the Commission for Conciliation, Mediation and Arbitration (CCMA) during the 2018/19 financial year.2 In the event where an employee is dismissed from work and he decides to challenge the dismissal, section 191 of the Labour Relations Act (LRA) grants the employee a right to refer the matter to the CCMA for conciliation or arbitration.3 The purpose of referring the disputes to the CCMA is to support an establishment of a voluntary, free of charge and expeditious mechanisms for labour disputes settlement and allow parties to resolve their disputes through a consensus based process before taking the route of a court process.4 There are time frames that are provided for the referral of disputes to the CCMA. Section 191 determines these time frames by stating that an employee must refer their alleged unfair dismissal to the CCMA within 30 days or 90 days when a dispute relates to an unfair labour practice in accordance with section 191(1)(b)(ii) of the LRA.5 The rationale behind these time frames was outlined in the Constitutional Court (CC) judgement of Toyota SA Motors (Pty) Ltd v CCMA,6 as a means to bring about the expeditious resolution of labour disputes which by their nature, require speedy resolution. , Thesis (L.L.M.) -- Faculty of Law, Mercantile Law, 2022
- Full Text:
- Date Issued: 2022-04
The criminal liability of health care practitioners for culpable homicide
- Authors: Dweba, Asavela
- Date: 2022-04
- Subjects: South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55511 , vital:52594
- Description: South African health societies and associations have allied to call for reform in the criminal law system involving the prosecution of health care practitioners, specifically on charges of culpable homicide. Warranted by the spate of criminal prosecutions against healthcare practitioners and the need for reform, this treatise investigates the criminal liability of healthcare practitioners for culpable homicide. Overall, this study aims to determine the recognition of criminal liability of healthcare practitioners, requirements for culpability, the level of negligence that constitutes culpable homicide, and whether the South African law can adjust the threshold for criminal liability in culpable homicide. An analysis of the consequences of legal literature concerning the offence of culpable homicide and medical negligence is provided. In addition, this study examines pertinent case law to devise a strategy for law reform in South Africa and the development of common law. The study includes a comparative study of foreign jurisdictions to incorporate the position in England, Scotland, New Zealand, India, and Canada from which South Africa can adopt some principles within the South African context. The analysis revealed that South Africa has a low threshold in the form of ordinary negligence required to establish criminal liability in cases of culpable homicide while a higher threshold is required for the selected foreign jurisdictions. Furthermore, this treatise contends that the current South African criminal justice regime is lacking in identifying the ideal degree of fault required for criminal conduct. Thus, reform of South Africa’s approach in dealing with healthcare practitioners suspected/ accused of causing the death of patients under medical care is necessary. This study recommends that the South African criminal law justice system should be developed by way of legislative intervention in which ‘gross negligence or recklessness’ will serve as a measure to criminalise the conduct of healthcare practitioners. This study acknowledges the noble role played by healthcare practitioners in the society and notes that medicine is not an exact science. Therefore, this treatise does not advocate a mandatory exoneration of criminal liability of healthcare practitioners. Rather, for a fair and evidence-based prosecution of reckless medical practices. , Thesis (LLM) -- Faculty of Law, Department of Criminal and Procedural Law, 2021
- Full Text:
- Date Issued: 2022-04
- Authors: Dweba, Asavela
- Date: 2022-04
- Subjects: South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55511 , vital:52594
- Description: South African health societies and associations have allied to call for reform in the criminal law system involving the prosecution of health care practitioners, specifically on charges of culpable homicide. Warranted by the spate of criminal prosecutions against healthcare practitioners and the need for reform, this treatise investigates the criminal liability of healthcare practitioners for culpable homicide. Overall, this study aims to determine the recognition of criminal liability of healthcare practitioners, requirements for culpability, the level of negligence that constitutes culpable homicide, and whether the South African law can adjust the threshold for criminal liability in culpable homicide. An analysis of the consequences of legal literature concerning the offence of culpable homicide and medical negligence is provided. In addition, this study examines pertinent case law to devise a strategy for law reform in South Africa and the development of common law. The study includes a comparative study of foreign jurisdictions to incorporate the position in England, Scotland, New Zealand, India, and Canada from which South Africa can adopt some principles within the South African context. The analysis revealed that South Africa has a low threshold in the form of ordinary negligence required to establish criminal liability in cases of culpable homicide while a higher threshold is required for the selected foreign jurisdictions. Furthermore, this treatise contends that the current South African criminal justice regime is lacking in identifying the ideal degree of fault required for criminal conduct. Thus, reform of South Africa’s approach in dealing with healthcare practitioners suspected/ accused of causing the death of patients under medical care is necessary. This study recommends that the South African criminal law justice system should be developed by way of legislative intervention in which ‘gross negligence or recklessness’ will serve as a measure to criminalise the conduct of healthcare practitioners. This study acknowledges the noble role played by healthcare practitioners in the society and notes that medicine is not an exact science. Therefore, this treatise does not advocate a mandatory exoneration of criminal liability of healthcare practitioners. Rather, for a fair and evidence-based prosecution of reckless medical practices. , Thesis (LLM) -- Faculty of Law, Department of Criminal and Procedural Law, 2021
- Full Text:
- Date Issued: 2022-04
The foraging ecology of female Cape fur seals (Arctocephalus pusillus pusillus) in South Africa
- Botha, Jonathan Aubrey, Kirkman, Stephen, Lombard, Amanda
- Authors: Botha, Jonathan Aubrey , Kirkman, Stephen , Lombard, Amanda
- Date: 2022-04
- Subjects: Seals (Animals)--Habitat—Conservation , Marine ecology—South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55965 , vital:54559
- Description: The marine environment is spatially and temporally dynamic and many marine ecosystems are experiencing impacts of broad-scale climate change. Within these ecosystems, marine predators play a crucial role in ecosystem function through their top-down influences on prey populations. These predators may also respond to bottom-up influences and changes at lower trophic levels. A thorough understanding of marine predator foraging ecology is thus important to improve our understanding of ecosystem function, inform conservation and management measures, and to predict the response of predators to future environmental change. The Cape fur seal (Arctocephalus pusillus pusillus) comprises a major proportion of the southern African marine predator biomass. However, little is known about the foraging distribution and behaviour of the species, despite its obvious importance within the ecosystem and increasing concerns regarding seal-fisheries conflict. Using a variety of technologies, including, GPS and satellite-linked tags, dive behaviour recorders, accelerometers and stable isotope analysis, this thesis investigated the foraging ecology of female Cape fur seals breeding on the coast of South Africa. First, to identify important foraging areas and assess the influence of geographic, temporal and environmental factors on these areas, lactating females from three breeding colonies were fitted with GPS or Argos-linked tracking devices, while individuals from two of these colonies were also fitted with dive behaviour recorders. Results revealed geographic differences in the foraging distributions and ranges of individuals between breeding colonies, which likely reflects a combined influence of ecological setting and density dependant competition. In addition, dive behaviour recorders revealed the occurrence of benthic foraging at both sites where they were deployed, and the dominance of this strategy in some individuals. , Thesis (PhD) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Botha, Jonathan Aubrey , Kirkman, Stephen , Lombard, Amanda
- Date: 2022-04
- Subjects: Seals (Animals)--Habitat—Conservation , Marine ecology—South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55965 , vital:54559
- Description: The marine environment is spatially and temporally dynamic and many marine ecosystems are experiencing impacts of broad-scale climate change. Within these ecosystems, marine predators play a crucial role in ecosystem function through their top-down influences on prey populations. These predators may also respond to bottom-up influences and changes at lower trophic levels. A thorough understanding of marine predator foraging ecology is thus important to improve our understanding of ecosystem function, inform conservation and management measures, and to predict the response of predators to future environmental change. The Cape fur seal (Arctocephalus pusillus pusillus) comprises a major proportion of the southern African marine predator biomass. However, little is known about the foraging distribution and behaviour of the species, despite its obvious importance within the ecosystem and increasing concerns regarding seal-fisheries conflict. Using a variety of technologies, including, GPS and satellite-linked tags, dive behaviour recorders, accelerometers and stable isotope analysis, this thesis investigated the foraging ecology of female Cape fur seals breeding on the coast of South Africa. First, to identify important foraging areas and assess the influence of geographic, temporal and environmental factors on these areas, lactating females from three breeding colonies were fitted with GPS or Argos-linked tracking devices, while individuals from two of these colonies were also fitted with dive behaviour recorders. Results revealed geographic differences in the foraging distributions and ranges of individuals between breeding colonies, which likely reflects a combined influence of ecological setting and density dependant competition. In addition, dive behaviour recorders revealed the occurrence of benthic foraging at both sites where they were deployed, and the dominance of this strategy in some individuals. , Thesis (PhD) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-04
The impact of leadership styles used by college heads on the functioning of TVET colleges in Limpopo
- Authors: Peter, Bandile
- Date: 2022-04
- Subjects: Management -- College heads , Decision-making -- post-secondary Education -- Limpopo
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/56091 , vital:55321
- Description: This study sought to examine the impact of leadership styles used by college heads on the functioning of TVET colleges in Limpopo. The purpose of the study was to better understand the prevailing path-goal leadership styles among college heads, the development and communication of college’s goals, vision and mission, involvement of lecturers and students in decision-making processes, motivation of students and lecturers, and continuous monitoring in the TVET colleges. The key research question that this study was based on was: What is the impact of the leadership styles used by college heads on the functioning of Limpopo TVET colleges? A mixed methods approach was adopted with questionnaires, interviews, observations and document review as a means of data collection. College heads (campus managers and HODs), lecturers and students were participants in this study. The participants were purposefully selected in three of the seven TVET colleges in the Limpopo Province. The findings indicated that all the four path-goal leadership styles were prevalent in the college heads. However, there was poor communication of the colleges’ goals, vision and mission. The study further found that lecturers and students were not on many occasions involved in the decision-making processes. Poor monitoring by college heads was also discovered by the study. Moreover, the study uncovered that lecturers and students were not properly rewarded for good performance. The subsequent recommendations include, among others, that as in-service training, DHET should provide the opportunity for college heads to take guided leadership courses that promote path-goal leadership styles. DHET should also provide college heads with the opportunity to study and enhance their qualifications in the areas of educational management and leadership. , Thesis (MEd) -- Faculty of Education, 2022
- Full Text:
- Date Issued: 2022-04
The impact of leadership styles used by college heads on the functioning of TVET colleges in Limpopo
- Authors: Peter, Bandile
- Date: 2022-04
- Subjects: Management -- College heads , Decision-making -- post-secondary Education -- Limpopo
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/56091 , vital:55321
- Description: This study sought to examine the impact of leadership styles used by college heads on the functioning of TVET colleges in Limpopo. The purpose of the study was to better understand the prevailing path-goal leadership styles among college heads, the development and communication of college’s goals, vision and mission, involvement of lecturers and students in decision-making processes, motivation of students and lecturers, and continuous monitoring in the TVET colleges. The key research question that this study was based on was: What is the impact of the leadership styles used by college heads on the functioning of Limpopo TVET colleges? A mixed methods approach was adopted with questionnaires, interviews, observations and document review as a means of data collection. College heads (campus managers and HODs), lecturers and students were participants in this study. The participants were purposefully selected in three of the seven TVET colleges in the Limpopo Province. The findings indicated that all the four path-goal leadership styles were prevalent in the college heads. However, there was poor communication of the colleges’ goals, vision and mission. The study further found that lecturers and students were not on many occasions involved in the decision-making processes. Poor monitoring by college heads was also discovered by the study. Moreover, the study uncovered that lecturers and students were not properly rewarded for good performance. The subsequent recommendations include, among others, that as in-service training, DHET should provide the opportunity for college heads to take guided leadership courses that promote path-goal leadership styles. DHET should also provide college heads with the opportunity to study and enhance their qualifications in the areas of educational management and leadership. , Thesis (MEd) -- Faculty of Education, 2022
- Full Text:
- Date Issued: 2022-04
The Impact of socio-Economic and institutional factors on the Livelihoods of artisanal fisherfolk of Korsten, Gqeberha.
- Authors: Forbes-Liberty,Abigail
- Date: 2022-04
- Subjects: Fishing--Social aspects -- South Africa , Korsten-- Gqeberha
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55584 , vital:53334
- Description: his dissertation focuses on a relatively underrepresented group of the fishing industry: subsistence fisherfolk. By using a Sustainable Livelihoods Approach (SLA) and Community Capitals Framework (CCF) as a theoretical framework and interpretive lens, the purpose of this qualitative study is to explore the impact of socio-economic and institutional factors on the livelihoods of artisanal fisherfolk of Korsten, Gqeberha (formerly known as Port Elizabeth). By highlighting the socio-spatial implications of the forced removals of the past, this dissertation shows that legislative reforms should consider the population that they affect. Food security is a major issue on a global scale and South Africa is not impervious to food security concerns. This dissertation focuses on the negative impact that socio-economic climate and legislation has had on subsistence fisherfolk. Hunger and poverty eradication is one of the key goals of sustainable development. In this case, subsistence fishers faced legislative reforms at two distinct points in its tumultuous past, both of which had a detrimental impact on this sector of society's ability to support a healthy livelihood. This research fills a theoretical and practical gap in research regarding the current livelihoods, policies, and laws, as well as provides a deeper understanding of the socio-economic context of the subsistence fishing community of Korsten, Gqeberha. The SLA and CCF helps readers understand how subsistence fishers contribute to local livelihoods and integrate into the greater processes of the community. Further, exploration of the institutional policies limiting subsistence fishers helps understand decision making processes and laws in artisanal fisheries and the implications thereof. A snowball sampling method was used to recruit and enrol participants for this study. The sample size consisted of fourteen (14) participants consisting of eight (8) subsistence fishers and six (6) relatives of subsistence fisherfolk. Narrative analysis is a qualitative method that was conducted in this study. Participant observation and semi-structured interviews were conducted as the methods of data collection and analysed in ATLAS.ti 9 Qualitative Analysis Software. Most participants indicated that fishing plays an integral part of their lives. It contributes to and still ensures the food security in the families of Korsten. In addition, participants highlighted the constant legislative and socio-economic barriers as well as the social and personal benefits of fishing in the community. A key recommendation is made for policy-makers to be cognizant of subsistence fishers and to include this underrepresented group in decision making processes. , Thesis (MSc) -- Faculty of Science, Geosciences, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Forbes-Liberty,Abigail
- Date: 2022-04
- Subjects: Fishing--Social aspects -- South Africa , Korsten-- Gqeberha
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55584 , vital:53334
- Description: his dissertation focuses on a relatively underrepresented group of the fishing industry: subsistence fisherfolk. By using a Sustainable Livelihoods Approach (SLA) and Community Capitals Framework (CCF) as a theoretical framework and interpretive lens, the purpose of this qualitative study is to explore the impact of socio-economic and institutional factors on the livelihoods of artisanal fisherfolk of Korsten, Gqeberha (formerly known as Port Elizabeth). By highlighting the socio-spatial implications of the forced removals of the past, this dissertation shows that legislative reforms should consider the population that they affect. Food security is a major issue on a global scale and South Africa is not impervious to food security concerns. This dissertation focuses on the negative impact that socio-economic climate and legislation has had on subsistence fisherfolk. Hunger and poverty eradication is one of the key goals of sustainable development. In this case, subsistence fishers faced legislative reforms at two distinct points in its tumultuous past, both of which had a detrimental impact on this sector of society's ability to support a healthy livelihood. This research fills a theoretical and practical gap in research regarding the current livelihoods, policies, and laws, as well as provides a deeper understanding of the socio-economic context of the subsistence fishing community of Korsten, Gqeberha. The SLA and CCF helps readers understand how subsistence fishers contribute to local livelihoods and integrate into the greater processes of the community. Further, exploration of the institutional policies limiting subsistence fishers helps understand decision making processes and laws in artisanal fisheries and the implications thereof. A snowball sampling method was used to recruit and enrol participants for this study. The sample size consisted of fourteen (14) participants consisting of eight (8) subsistence fishers and six (6) relatives of subsistence fisherfolk. Narrative analysis is a qualitative method that was conducted in this study. Participant observation and semi-structured interviews were conducted as the methods of data collection and analysed in ATLAS.ti 9 Qualitative Analysis Software. Most participants indicated that fishing plays an integral part of their lives. It contributes to and still ensures the food security in the families of Korsten. In addition, participants highlighted the constant legislative and socio-economic barriers as well as the social and personal benefits of fishing in the community. A key recommendation is made for policy-makers to be cognizant of subsistence fishers and to include this underrepresented group in decision making processes. , Thesis (MSc) -- Faculty of Science, Geosciences, 2022
- Full Text:
- Date Issued: 2022-04
The mechanisms conditioning doctoral supervision development in public universities across South Africa
- Authors: Motshoane, Puleng Lorraine
- Date: 2022-04
- Subjects: Doctoral students South Africa , Graduate students Supervision of South Africa , Agent (Philosophy) , Public universities and colleges South Africa , Supervisors Training of South Africa , Supervision South Africa , Mentoring in education South Africa
- Language: English
- Type: Doctoral thesis , text
- Identifier: http://hdl.handle.net/10962/232305 , vital:49980 , DOI 10.21504/10962/232305
- Description: This study offers a social realist account of how South African public institutions develop emerging supervisors. The study addresses the need for supervision development across South African public higher education universities. The purpose of the study was to answer the question “What mechanisms condition the development and support of emerging doctoral supervisors across South African public universities?” To examine this question, analytical dualism was used to separate the roles of the ‘people’ (agents) from the ‘parts’ (structure and culture) to examine their interplay. The study was qualitative, and the data was generated through documents, an online survey, and semi-structured interviews. One hundred and eighty-six participants responded to the survey and fifty-four people were interviewed. The participants came from twenty of the twenty-six public higher education universities and represent a large range of disciplines. The study findings revealed that emerging supervisors were often simply ‘thrown into the deep-end’ as they had to work out how to supervise by learning from their students and using the experience gained while they were being supervised. This was experienced as highly problematic by the participants who shared this understanding. Secondly, the findings suggest that where there were developmental events in place, some were not well received. For example where those providing the training were not regarded as credible because they lacked the supervision experience or because the interventions were seen to be too ad hoc and generic. There were calls for more discipline-specific interventions and collaborative spaces where emerging supervisors could engage with experienced supervisors rather than being instructed in a generic best-practice of ‘how to supervise’. The findings indicated that the lines between co-supervision and mentoring were often blurred, and both were used as another form of supervision development. Such relationships provided a useful means for emerging supervisors to come to understand the complex pedagogy of postgraduate supervision but were at times constrained by power imbalances. It was evident across the data that supervision is a special form of teaching and needs to be conceptualised at least in part as a pedagogy. Moreover, the issue of institutional differentiation needs to be considered for the sector to achieve its intended goals of increasing doctoral output and to be able to participate fully in the knowledge economy. , Phuputso ena e fana ka tlaleho ea 'nete ea kahisano ea kamoo litsi tsa Afrika Boroa li ntlafatsang batsamaisi ba ntseng ba hlaha. Phuputso ena e sebetsana le tlhokeho ya ntshetsopele ya bolebedi ho tswa ho diyunibesithing tsa thuto e phahameng tsa setjhaba tsa Aforika Borwa. Sepheo sa phuputso e ne e le ho araba potso e mabapi le "Ke mekhoa efe e behang nts'etsopele le tšehetso ea baokameli ba ntseng ba tsoela pele ho pholletsa le liunivesithi tsa sechaba tsa Afrika Boroa?" E le ho hlahloba potso ena, ho ile ha sebelisoa li-analytical dualism ho arola likarolo tsa "batho" (baemeli) ho "likarolo" (sebopeho le setso) ho hlahloba likamano tsa bona. Thuto e ne e le ea boleng, 'me lintlha li ile tsa hlahisoa ka litokomane, phuputso ea inthaneteng, le lipuisano tse hlophisitsoeng hantle. Barupeluoa ba lekholo le mashome a robeli a metso e tšeletseng ba ile ba arabela phuputsong eo, 'me batho ba 54 ba botsoa. Barupeluoa ba ne ba tsoa liunivesithing tse mashome a mabeli ho tse mashome a mabeli a metso e tšeletseng tsa thuto e phahameng ea sechaba 'me ba emetse mefuta e mengata ea lithuto. Liphuputso tsa phuputso li senotse hore baokameli ba ntseng ba hlaha hangata ba ne ba ‘lahleloa botebong ba pelo kaha ba ne ba lokela ho etsa qeto ea ho laola ka ho ithuta ho liithuti tsa bona le ho sebelisa phihlelo eo ba e fumaneng ha ba ntse ba behiloe leihlo. Phihlelo ena e bile bothata haholo ho barupeluoa ba arolelanang boiphihlelo bona. Taba ea bobeli, liphuputso li fana ka maikutlo a hore ha liketsahalo tsa nts'etsopele li ntse li le teng, tse ling ha lia ka tsa amoheloa hantle, mohlala, hobane ba fanang ka koetliso ba ne ba sa nkoe e le ba ka tšeptjoang hobane ba ne ba se na boiphihlelo ba bolebeli kapa hobane ho ne ho bonahala hore ho na le mehato ea nakoana. . Ho bile le meipiletso ea hore ho be le litšebetso tse khethehileng tsa khalemelo le libaka tse kopanetsoeng moo baokameli ba neng ba ka buisana le baokameli ba nang le phihlelo ho e-na le ho rutoa ka mokhoa o tloaelehileng oa 'ho laola'. Liphuputso li bonts'itse hore litsela tse pakeng tsa ts'ebelisano-'moho le boeletsi hangata li ne li sa hlaka. Ho feta moo, ka bobeli li ne li sebelisoa e le mofuta o mong oa ntlafatso ea tlhokomelo. Likamano tse joalo li ne li fana ka mokhoa oa bohlokoa bakeng sa baokameli ba ba qalang ho utloisisa thuto e rarahaneng ea bolebeli ba morao-rao empa ka linako tse ling ba ne ba sitisoa ke ho se leka-lekane ha matla. Ho ile ha totobala ho pholletsa le data hore tsamaiso ke mokhoa o ikhethileng oa ho ruta 'me o hloka ho nahanoa bonyane e le mokhoa oa ho ruta. Ho feta moo, taba ea karohano ea litsi e lokela ho shejoa hore lekala le fihlele lipheo tsa lona tse reriloeng tsa ho eketsa tlhahiso ea bongaka le ho kenya letsoho ka botlalo moruong oa tsebo. , Thesis (PhD) -- Faculty of Education, Education, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Motshoane, Puleng Lorraine
- Date: 2022-04
- Subjects: Doctoral students South Africa , Graduate students Supervision of South Africa , Agent (Philosophy) , Public universities and colleges South Africa , Supervisors Training of South Africa , Supervision South Africa , Mentoring in education South Africa
- Language: English
- Type: Doctoral thesis , text
- Identifier: http://hdl.handle.net/10962/232305 , vital:49980 , DOI 10.21504/10962/232305
- Description: This study offers a social realist account of how South African public institutions develop emerging supervisors. The study addresses the need for supervision development across South African public higher education universities. The purpose of the study was to answer the question “What mechanisms condition the development and support of emerging doctoral supervisors across South African public universities?” To examine this question, analytical dualism was used to separate the roles of the ‘people’ (agents) from the ‘parts’ (structure and culture) to examine their interplay. The study was qualitative, and the data was generated through documents, an online survey, and semi-structured interviews. One hundred and eighty-six participants responded to the survey and fifty-four people were interviewed. The participants came from twenty of the twenty-six public higher education universities and represent a large range of disciplines. The study findings revealed that emerging supervisors were often simply ‘thrown into the deep-end’ as they had to work out how to supervise by learning from their students and using the experience gained while they were being supervised. This was experienced as highly problematic by the participants who shared this understanding. Secondly, the findings suggest that where there were developmental events in place, some were not well received. For example where those providing the training were not regarded as credible because they lacked the supervision experience or because the interventions were seen to be too ad hoc and generic. There were calls for more discipline-specific interventions and collaborative spaces where emerging supervisors could engage with experienced supervisors rather than being instructed in a generic best-practice of ‘how to supervise’. The findings indicated that the lines between co-supervision and mentoring were often blurred, and both were used as another form of supervision development. Such relationships provided a useful means for emerging supervisors to come to understand the complex pedagogy of postgraduate supervision but were at times constrained by power imbalances. It was evident across the data that supervision is a special form of teaching and needs to be conceptualised at least in part as a pedagogy. Moreover, the issue of institutional differentiation needs to be considered for the sector to achieve its intended goals of increasing doctoral output and to be able to participate fully in the knowledge economy. , Phuputso ena e fana ka tlaleho ea 'nete ea kahisano ea kamoo litsi tsa Afrika Boroa li ntlafatsang batsamaisi ba ntseng ba hlaha. Phuputso ena e sebetsana le tlhokeho ya ntshetsopele ya bolebedi ho tswa ho diyunibesithing tsa thuto e phahameng tsa setjhaba tsa Aforika Borwa. Sepheo sa phuputso e ne e le ho araba potso e mabapi le "Ke mekhoa efe e behang nts'etsopele le tšehetso ea baokameli ba ntseng ba tsoela pele ho pholletsa le liunivesithi tsa sechaba tsa Afrika Boroa?" E le ho hlahloba potso ena, ho ile ha sebelisoa li-analytical dualism ho arola likarolo tsa "batho" (baemeli) ho "likarolo" (sebopeho le setso) ho hlahloba likamano tsa bona. Thuto e ne e le ea boleng, 'me lintlha li ile tsa hlahisoa ka litokomane, phuputso ea inthaneteng, le lipuisano tse hlophisitsoeng hantle. Barupeluoa ba lekholo le mashome a robeli a metso e tšeletseng ba ile ba arabela phuputsong eo, 'me batho ba 54 ba botsoa. Barupeluoa ba ne ba tsoa liunivesithing tse mashome a mabeli ho tse mashome a mabeli a metso e tšeletseng tsa thuto e phahameng ea sechaba 'me ba emetse mefuta e mengata ea lithuto. Liphuputso tsa phuputso li senotse hore baokameli ba ntseng ba hlaha hangata ba ne ba ‘lahleloa botebong ba pelo kaha ba ne ba lokela ho etsa qeto ea ho laola ka ho ithuta ho liithuti tsa bona le ho sebelisa phihlelo eo ba e fumaneng ha ba ntse ba behiloe leihlo. Phihlelo ena e bile bothata haholo ho barupeluoa ba arolelanang boiphihlelo bona. Taba ea bobeli, liphuputso li fana ka maikutlo a hore ha liketsahalo tsa nts'etsopele li ntse li le teng, tse ling ha lia ka tsa amoheloa hantle, mohlala, hobane ba fanang ka koetliso ba ne ba sa nkoe e le ba ka tšeptjoang hobane ba ne ba se na boiphihlelo ba bolebeli kapa hobane ho ne ho bonahala hore ho na le mehato ea nakoana. . Ho bile le meipiletso ea hore ho be le litšebetso tse khethehileng tsa khalemelo le libaka tse kopanetsoeng moo baokameli ba neng ba ka buisana le baokameli ba nang le phihlelo ho e-na le ho rutoa ka mokhoa o tloaelehileng oa 'ho laola'. Liphuputso li bonts'itse hore litsela tse pakeng tsa ts'ebelisano-'moho le boeletsi hangata li ne li sa hlaka. Ho feta moo, ka bobeli li ne li sebelisoa e le mofuta o mong oa ntlafatso ea tlhokomelo. Likamano tse joalo li ne li fana ka mokhoa oa bohlokoa bakeng sa baokameli ba ba qalang ho utloisisa thuto e rarahaneng ea bolebeli ba morao-rao empa ka linako tse ling ba ne ba sitisoa ke ho se leka-lekane ha matla. Ho ile ha totobala ho pholletsa le data hore tsamaiso ke mokhoa o ikhethileng oa ho ruta 'me o hloka ho nahanoa bonyane e le mokhoa oa ho ruta. Ho feta moo, taba ea karohano ea litsi e lokela ho shejoa hore lekala le fihlele lipheo tsa lona tse reriloeng tsa ho eketsa tlhahiso ea bongaka le ho kenya letsoho ka botlalo moruong oa tsebo. , Thesis (PhD) -- Faculty of Education, Education, 2022
- Full Text:
- Date Issued: 2022-04
The narratives of women in South Africa who use social media to talk about gender-based violence
- Authors: Walton, Donica Jasmin
- Date: 2022-04
- Subjects: Women Violence against South Africa , Social media and society South Africa , Internet and activism South Africa , Discourse analysis, Narrative , Internet and women South Africa , Subject positions
- Language: English
- Type: Master's thesis , text
- Identifier: http://hdl.handle.net/10962/232590 , vital:50005
- Description: There has been research conducted, both globally and in South Africa, on social media activism against gender-based violence (GBV). However, most research on the topic is based on participants in other parts of the world. Not much has been published on Black, African women. More specifically, not much is known about how women in South Africa experience using social media to talk about GBV. This research project draws on critical feminism and a narrative-discursive approach to explore the narratives of women in South Africa who use social media to talk about GBV. This is done by identifying the discourses women draw on to construct narratives, the subject positions utilised within these discourses, and how “trouble” and “repair” features in the narratives and positioning of women. Twelve interviews were conducted with women who volunteered and fit the inclusion criteria. The analysis of data was presented in two parts. The first set of discourses (discourses of ‘efficacy’, ‘convenience’, and ‘education’) were focused on what the use of social media achieves irrespective of the topic being discussed. These discourses speak to the idea that social media is powerful and useful because of its reach, speed, immediacy, and ability to be used to educate and be educated. The second set of discourses (discourses of ‘community and solidarity’, ‘validation’, and ‘vulnerability’) were focused on what the use of social media does for the people participating. Women have found a community and solidarity, and their experiences and thoughts have been validated on social media. Overall, the women in this research project justified their use of social media for activism against GBV, and acknowledged the tension that exists because despite its potential, there are limitations. , Thesis (MSocSci) -- Faculty of Humanities, Psychology, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Walton, Donica Jasmin
- Date: 2022-04
- Subjects: Women Violence against South Africa , Social media and society South Africa , Internet and activism South Africa , Discourse analysis, Narrative , Internet and women South Africa , Subject positions
- Language: English
- Type: Master's thesis , text
- Identifier: http://hdl.handle.net/10962/232590 , vital:50005
- Description: There has been research conducted, both globally and in South Africa, on social media activism against gender-based violence (GBV). However, most research on the topic is based on participants in other parts of the world. Not much has been published on Black, African women. More specifically, not much is known about how women in South Africa experience using social media to talk about GBV. This research project draws on critical feminism and a narrative-discursive approach to explore the narratives of women in South Africa who use social media to talk about GBV. This is done by identifying the discourses women draw on to construct narratives, the subject positions utilised within these discourses, and how “trouble” and “repair” features in the narratives and positioning of women. Twelve interviews were conducted with women who volunteered and fit the inclusion criteria. The analysis of data was presented in two parts. The first set of discourses (discourses of ‘efficacy’, ‘convenience’, and ‘education’) were focused on what the use of social media achieves irrespective of the topic being discussed. These discourses speak to the idea that social media is powerful and useful because of its reach, speed, immediacy, and ability to be used to educate and be educated. The second set of discourses (discourses of ‘community and solidarity’, ‘validation’, and ‘vulnerability’) were focused on what the use of social media does for the people participating. Women have found a community and solidarity, and their experiences and thoughts have been validated on social media. Overall, the women in this research project justified their use of social media for activism against GBV, and acknowledged the tension that exists because despite its potential, there are limitations. , Thesis (MSocSci) -- Faculty of Humanities, Psychology, 2022
- Full Text:
- Date Issued: 2022-04
The perception of school management teams and Teachers about their role to implement the national school nutrition programme in the Sisonke District in KwaZulu-Natal
- Authors: Zulu, Xolani Wycliff
- Date: 2022-04
- Subjects: School management teams , nutrition -- Study and teaching -- KwaZulu-Natal
- Language: English
- Type: Doctoral's theses , Thesis
- Identifier: http://hdl.handle.net/10948/56102 , vital:55420
- Description: This study focused on the perception of School Management Teams and Teachers about their role to implement the national school nutrition programme in the Sisonke District in KwaZulu-Natal (South Africa). The national school nutrition programme like any other projects in the country, faces some changes in the District which seem to interfere with the role of stakeholders in implementing the programme. This study explored the following research question with the set of secondary research questions: What are the perceptions of School Management Teams and Teachers in the Sisonke District of KwaZulu-Natal about their role in National School Nutrition Programme? • What perceptions do teachers and school managers have on the implementation of National School Nutrition Programme? • What challenges do Teachers and School Managers have to enhance the objectives of the National School Nutrition Programme? Both Teachers and School Managers were conveniently and purposively selected. For the generation of data, semi-structured interviews were used which were tape-recorded which were followed by transcription of data with interim analysis. Data was also generated through the use document analysis. Thematic analysis was used to analyse the data, which was theoretically framed by Maslow’s theory of motivation, Hertzberg two-factor motivation theory, Lawler and Porter’s Expectancy theory of motivation and the Situational theory of Hersey and Blanchard through which, I lens the study and managed to explain the findings. The study findings revealed that most Teachers and School Managers perceived national school nutrition programme as an important programme in the context of Umzimkhulu as it isa deep rural area. Despite the positive perceptions of Teachers and School Managers about their role, the study findings further revealed that they are facing some challenges in the implementation of the programme. The findings have several implications for poverty alleviation in the Sisonke District, job creation and improved learner’s attendance, improved health conditions of learners. They also highlighted the weaknesses of the DBE official’s nutrition sub-directorate about role players of the programme. Both stakeholders in fulfilling their role, should take into consideration the constitutional rights of learners as some of them are in Maslow’s hierarchy of needs. , Thesis (PhD) -- Faculty of Education, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Zulu, Xolani Wycliff
- Date: 2022-04
- Subjects: School management teams , nutrition -- Study and teaching -- KwaZulu-Natal
- Language: English
- Type: Doctoral's theses , Thesis
- Identifier: http://hdl.handle.net/10948/56102 , vital:55420
- Description: This study focused on the perception of School Management Teams and Teachers about their role to implement the national school nutrition programme in the Sisonke District in KwaZulu-Natal (South Africa). The national school nutrition programme like any other projects in the country, faces some changes in the District which seem to interfere with the role of stakeholders in implementing the programme. This study explored the following research question with the set of secondary research questions: What are the perceptions of School Management Teams and Teachers in the Sisonke District of KwaZulu-Natal about their role in National School Nutrition Programme? • What perceptions do teachers and school managers have on the implementation of National School Nutrition Programme? • What challenges do Teachers and School Managers have to enhance the objectives of the National School Nutrition Programme? Both Teachers and School Managers were conveniently and purposively selected. For the generation of data, semi-structured interviews were used which were tape-recorded which were followed by transcription of data with interim analysis. Data was also generated through the use document analysis. Thematic analysis was used to analyse the data, which was theoretically framed by Maslow’s theory of motivation, Hertzberg two-factor motivation theory, Lawler and Porter’s Expectancy theory of motivation and the Situational theory of Hersey and Blanchard through which, I lens the study and managed to explain the findings. The study findings revealed that most Teachers and School Managers perceived national school nutrition programme as an important programme in the context of Umzimkhulu as it isa deep rural area. Despite the positive perceptions of Teachers and School Managers about their role, the study findings further revealed that they are facing some challenges in the implementation of the programme. The findings have several implications for poverty alleviation in the Sisonke District, job creation and improved learner’s attendance, improved health conditions of learners. They also highlighted the weaknesses of the DBE official’s nutrition sub-directorate about role players of the programme. Both stakeholders in fulfilling their role, should take into consideration the constitutional rights of learners as some of them are in Maslow’s hierarchy of needs. , Thesis (PhD) -- Faculty of Education, 2022
- Full Text:
- Date Issued: 2022-04
The potential impacts of hydraulic fracturing on Khoisan peoples’ sense of place: in the case of Karoo Region, South Africa
- Authors: Tembe, Thandeka
- Date: 2022-04
- Subjects: Hydraulic fracturing--Environmental aspects--South Africa--Eastern Cape , Khoikhoi (African people) -- History
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55701 , vital:53408
- Description: Hydraulic fracturing is a practical solution to minimising production of fossil fuels and to boost the South African economy. However, this development comes at a cost to the society, environment and heritage of the Karoo, which is home to majority of the Khoisan community. Developments such as hydraulic fracturing are barely understood by local communities therefore this study tried to determine the potential impacts of hydraulic fracturing on Khoisan people’s sense of place in the Karoo region, to also establish their perceptions, attitudes, opinion and knowledge on hydraulic fracturing, to facilitate and improve understanding. A mixed method approach was employed to gather relevant information from participants. The qualitative data collection used semi structured interviews to gain participants perceptions, attitudes, opinions and knowledge on hydraulic fracturing, whereas quantitative used questionnaire survey which was administrated to gain socio-demographics and sense of place of Khoisan people (N=50) using survey based psychometric approach to examine the relationship between Khoisan people and sense of place on proposed hydraulic fracturing in the Karoo region (Cradock). Primary data was employed to gain in depth raw data directly from participants and secondary data from literature that already exists. The purposive and snowball sampling technique was used to draw Khoisan participants from the Karoo region (Cradock). Data acquired was analysed using SPSS v26 and Microsoft excel. The results concluded that most Khoisan participants (N= 43) are not aware of what hydraulic fracturing is and therefore there is a need to be taught about the development. The (N= 7) of the participants who have an idea of what hydraulic fracturing is had attended a workshop that was facilitated by the AEON research institute, others learnt about it on the internet and others were informed by someone who either learnt from the internet or attend the workshop. The study also concluded that the Khoisan people have a strong positive sense of place (α= 0.922) with the Karoo region therefore going ahead with the proposed hydraulic fracturing will cause massive damage and could possibly lead to solastalgia and loss of sense of place. vi The recommendation of the study was to involve all stakeholders who will be part of the development of hydraulic fracturing from government, research institutes to oil and gas companies to thorough research, educate and inform local communities in the Karoo. Therefore, it is essential for the government to protect the Karoo culture and heritage, local peoples sense of place by communicating with local communities on such development and assist in holding these companies reliable for any misconducts. , Thesis (MSc) -- Faculty of Science, Environmental Geography, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Tembe, Thandeka
- Date: 2022-04
- Subjects: Hydraulic fracturing--Environmental aspects--South Africa--Eastern Cape , Khoikhoi (African people) -- History
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55701 , vital:53408
- Description: Hydraulic fracturing is a practical solution to minimising production of fossil fuels and to boost the South African economy. However, this development comes at a cost to the society, environment and heritage of the Karoo, which is home to majority of the Khoisan community. Developments such as hydraulic fracturing are barely understood by local communities therefore this study tried to determine the potential impacts of hydraulic fracturing on Khoisan people’s sense of place in the Karoo region, to also establish their perceptions, attitudes, opinion and knowledge on hydraulic fracturing, to facilitate and improve understanding. A mixed method approach was employed to gather relevant information from participants. The qualitative data collection used semi structured interviews to gain participants perceptions, attitudes, opinions and knowledge on hydraulic fracturing, whereas quantitative used questionnaire survey which was administrated to gain socio-demographics and sense of place of Khoisan people (N=50) using survey based psychometric approach to examine the relationship between Khoisan people and sense of place on proposed hydraulic fracturing in the Karoo region (Cradock). Primary data was employed to gain in depth raw data directly from participants and secondary data from literature that already exists. The purposive and snowball sampling technique was used to draw Khoisan participants from the Karoo region (Cradock). Data acquired was analysed using SPSS v26 and Microsoft excel. The results concluded that most Khoisan participants (N= 43) are not aware of what hydraulic fracturing is and therefore there is a need to be taught about the development. The (N= 7) of the participants who have an idea of what hydraulic fracturing is had attended a workshop that was facilitated by the AEON research institute, others learnt about it on the internet and others were informed by someone who either learnt from the internet or attend the workshop. The study also concluded that the Khoisan people have a strong positive sense of place (α= 0.922) with the Karoo region therefore going ahead with the proposed hydraulic fracturing will cause massive damage and could possibly lead to solastalgia and loss of sense of place. vi The recommendation of the study was to involve all stakeholders who will be part of the development of hydraulic fracturing from government, research institutes to oil and gas companies to thorough research, educate and inform local communities in the Karoo. Therefore, it is essential for the government to protect the Karoo culture and heritage, local peoples sense of place by communicating with local communities on such development and assist in holding these companies reliable for any misconducts. , Thesis (MSc) -- Faculty of Science, Environmental Geography, 2022
- Full Text:
- Date Issued: 2022-04
The systematic assembly of prostate specific antigen electrochemical sensors based on asymmetric Co(II) phthalocyanines, graphitic quantum dots and an aptamer
- Authors: Nxele, Siphesihle Robin
- Date: 2022-04
- Subjects: Prostate-specific antigen , Electrochemical sensors , Phthalocyanines , Quantum dots , Co(II) phthalocyanines , Aptamer
- Language: English
- Type: Doctoral thesis , text
- Identifier: http://hdl.handle.net/10962/232893 , vital:50035 , DOI 10.21504/10962/232893
- Description: The need for low-cost, efficient and simple diagnostic tools has led to more research going into this subject, with the aim of making such medical devices more accessible where they are needed. This has led to more researchers developing point-of-care devices for this purpose worldwide, by sensor fabrication. This thesis focuses on electrochemical sensor development for the early diagnosis of prostate cancer. It is common knowledge that prostate cancer is one of the most prevalent carcinomas that have claimed lives due to late diagnosis where even the most invasive treatments have failed. For this reason, development of early detection devices that can even be used in the comfort of home is necessary and quite crucial. Electrochemical sensors have gained much attention due to their ease of fabrication, cost effectiveness, simplicity, ease of use and high efficiency. Using nanocomposites as modifiers has also become popular as they provide greater stability and improve detection limits when used together with biomolecules. With that said, the work reported herein has combined nanocomposites of graphenebased quantum dots, gold nanoparticles, phthalocyanines and an aptamer in order to fabricate aptasensors for the electrochemical detection of prostate cancer biomarker. The aptamer is specifically designed to bind to the biomarker, and the nanocomposites are expected to enhance current output thus lowering detection limits and increasing stability and efficiency. Reproducible results are also expected. Prior to the detection of the prostate cancer biomarker, the quantum dots-phthalocyanine nanohybrids were used to detect L-cysteine, which is an amino acid, in order to verify the synergistic effects as electrode modifiers that lead to the enhancement of current output. This increase in current output is then v exploited for the improvement of aptasensor functionality upon incorporation of the aptamer, for the detection of prostate specific antigen. The research in this thesis has been carried out with the intention of contributing to the world of medical research, more so because of the ever-increasing need for medical care to become accessible to all and not only to those who can afford expensive technologies and treatments. , Thesis (PhD) -- Faculty of Science, Chemistry, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Nxele, Siphesihle Robin
- Date: 2022-04
- Subjects: Prostate-specific antigen , Electrochemical sensors , Phthalocyanines , Quantum dots , Co(II) phthalocyanines , Aptamer
- Language: English
- Type: Doctoral thesis , text
- Identifier: http://hdl.handle.net/10962/232893 , vital:50035 , DOI 10.21504/10962/232893
- Description: The need for low-cost, efficient and simple diagnostic tools has led to more research going into this subject, with the aim of making such medical devices more accessible where they are needed. This has led to more researchers developing point-of-care devices for this purpose worldwide, by sensor fabrication. This thesis focuses on electrochemical sensor development for the early diagnosis of prostate cancer. It is common knowledge that prostate cancer is one of the most prevalent carcinomas that have claimed lives due to late diagnosis where even the most invasive treatments have failed. For this reason, development of early detection devices that can even be used in the comfort of home is necessary and quite crucial. Electrochemical sensors have gained much attention due to their ease of fabrication, cost effectiveness, simplicity, ease of use and high efficiency. Using nanocomposites as modifiers has also become popular as they provide greater stability and improve detection limits when used together with biomolecules. With that said, the work reported herein has combined nanocomposites of graphenebased quantum dots, gold nanoparticles, phthalocyanines and an aptamer in order to fabricate aptasensors for the electrochemical detection of prostate cancer biomarker. The aptamer is specifically designed to bind to the biomarker, and the nanocomposites are expected to enhance current output thus lowering detection limits and increasing stability and efficiency. Reproducible results are also expected. Prior to the detection of the prostate cancer biomarker, the quantum dots-phthalocyanine nanohybrids were used to detect L-cysteine, which is an amino acid, in order to verify the synergistic effects as electrode modifiers that lead to the enhancement of current output. This increase in current output is then v exploited for the improvement of aptasensor functionality upon incorporation of the aptamer, for the detection of prostate specific antigen. The research in this thesis has been carried out with the intention of contributing to the world of medical research, more so because of the ever-increasing need for medical care to become accessible to all and not only to those who can afford expensive technologies and treatments. , Thesis (PhD) -- Faculty of Science, Chemistry, 2022
- Full Text:
- Date Issued: 2022-04
The use of psychometric test systems as a pre-selection tool for identifying successful harvesting machine operators
- Authors: Schwegman, Kylle
- Date: 2022-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55246 , vital:51102
- Description: A shift towards fully mechanized forest activities, such as harvesting and, more recently, silviculture, has occurred from the early 2 000’s. The reason for mechanizing these activities differs for each country, although for most countries there is concern relating to the health and safety of forest workers. With mechanization in harvesting, the forest worker has moved away from the physical intensity of having to fell, debranch, debark and cross-cut trees into logs using either an axe or chainsaw, to operating a machine. Studies revolving around the human element (operator) have been conducted specifically relating to the ergonomics of the machines and how operators may influence machine productivity. Results showed that due to the repetitive nature of the work, the operators are exposed to associated stresses for longer periods. Typical injuries associated to these kinds of stressors are whole body vibrations (WBVs), repetitive hand and arm movements, non-neutral body postures and manual lifting, which lead to musculoskeletal symptoms in the lower back, neck and shoulders. However, as machine technology improves so does the ergonomic conditions which are experienced by machine operators. Machine productivity can be influenced by various factors, with the most influential being tree volume. However, a recent study showed that over 40% of variation in machine productivity has been observed amongst different machine operators operating similar machines. The specific reason for these differences has yet to be determined. However, decision making, motivation, planning capacity, concentration, memory, motor coordination, pattern recognition, logic reasoning, and spatial perception are abilities that have been described as important for successful harvesting work. The pre-selection of operators using psychometric and cognitive tests is not new to forestry, although very little information is available relating to the aptitude test known as the Vienna test system as well as the best possible demographic associated with successful harvesting operators. The overall aim of this study was to determine whether the high variation found amongst harvesting machine operators could be reduced initially through a preselection process which involves the use of aptitude tests (Vienna Test System) and demographic questionnaires. A study was implemented in Zululand, South Africa, testing whether there were significant productivity differences between nine machine operators. , Thesis (PhD) -- Faculty of Science, School of Natural Resource Management, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Schwegman, Kylle
- Date: 2022-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55246 , vital:51102
- Description: A shift towards fully mechanized forest activities, such as harvesting and, more recently, silviculture, has occurred from the early 2 000’s. The reason for mechanizing these activities differs for each country, although for most countries there is concern relating to the health and safety of forest workers. With mechanization in harvesting, the forest worker has moved away from the physical intensity of having to fell, debranch, debark and cross-cut trees into logs using either an axe or chainsaw, to operating a machine. Studies revolving around the human element (operator) have been conducted specifically relating to the ergonomics of the machines and how operators may influence machine productivity. Results showed that due to the repetitive nature of the work, the operators are exposed to associated stresses for longer periods. Typical injuries associated to these kinds of stressors are whole body vibrations (WBVs), repetitive hand and arm movements, non-neutral body postures and manual lifting, which lead to musculoskeletal symptoms in the lower back, neck and shoulders. However, as machine technology improves so does the ergonomic conditions which are experienced by machine operators. Machine productivity can be influenced by various factors, with the most influential being tree volume. However, a recent study showed that over 40% of variation in machine productivity has been observed amongst different machine operators operating similar machines. The specific reason for these differences has yet to be determined. However, decision making, motivation, planning capacity, concentration, memory, motor coordination, pattern recognition, logic reasoning, and spatial perception are abilities that have been described as important for successful harvesting work. The pre-selection of operators using psychometric and cognitive tests is not new to forestry, although very little information is available relating to the aptitude test known as the Vienna test system as well as the best possible demographic associated with successful harvesting operators. The overall aim of this study was to determine whether the high variation found amongst harvesting machine operators could be reduced initially through a preselection process which involves the use of aptitude tests (Vienna Test System) and demographic questionnaires. A study was implemented in Zululand, South Africa, testing whether there were significant productivity differences between nine machine operators. , Thesis (PhD) -- Faculty of Science, School of Natural Resource Management, 2022
- Full Text:
- Date Issued: 2022-04
Towards a risk assessment matrix for information security workarounds associated with acceptable use policies
- Authors: Slabbert,Eugene
- Date: 2022-04
- Subjects: Information networks--security measures , Computer security--South africa
- Language: English
- Type: Master's theses
- Identifier: http://hdl.handle.net/10948/55533 , vital:52811
- Description: Acceptable Use Policies (AUPs) are used to influence employees’ information security behaviour. Some employees feel that the AUPs and related procedures interfere with their ability to work efficiently and may, therefore, choose not to comply by utilising information security workarounds associated with the AUP. An AUP workaround is a form of information security non compliance that may result in unnecessary information security risk exposure for an organisation. Some AUP workarounds may be useful as they identify more efficient ways to complete tasks that may not impact the information security of an organisation. However, these efficiencies should only be considered for incorporation into standard procedures when the information security risk exposure of an AUP workaround is known. This leads to the problem statement. Many organisations do not have a formal way in which to assess the information security risks posed by workarounds associated with their Acceptable Use Policies, and related procedures. This study provides a solution to the identified problem through the primary objective, to develop a Risk Assessment Matrix for Information Security Workarounds associated with Acceptable Use Policies, and related procedures. Four secondary research objectives were proposed to achieve the primary research objective. The first secondary objective determines the role of information security risk management and how it relates to information security governance through the utilisation of a literature review. The second secondary objective firstly utilises a literature review to determine the role that the AUP and its related procedures play within an organisation, followed by a content analysis which identifies the key content that should be considered in a comprehensive AUP. The third secondary objective determines the factors that influence the use of AUP workarounds within an organisation through the utilisation of a literature review. Lastly, the fourth secondary objective utilises a literature review to determine the key components required for the development of the risk assessment matrix for information security workarounds. In addition, critical reasoning is used to create the risk assessment matrix for information security workarounds. The solution to this study contributes to the body of knowledge by proposing a risk assessment matrix to assess the information security risk exposure of AUP workarounds and find possible efficiency gains while keeping information security risk exposure to a minimum. , Thesis (MTech) -- Faculty of Engineering, the Built Environment and Information Technology , Information Technology, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Slabbert,Eugene
- Date: 2022-04
- Subjects: Information networks--security measures , Computer security--South africa
- Language: English
- Type: Master's theses
- Identifier: http://hdl.handle.net/10948/55533 , vital:52811
- Description: Acceptable Use Policies (AUPs) are used to influence employees’ information security behaviour. Some employees feel that the AUPs and related procedures interfere with their ability to work efficiently and may, therefore, choose not to comply by utilising information security workarounds associated with the AUP. An AUP workaround is a form of information security non compliance that may result in unnecessary information security risk exposure for an organisation. Some AUP workarounds may be useful as they identify more efficient ways to complete tasks that may not impact the information security of an organisation. However, these efficiencies should only be considered for incorporation into standard procedures when the information security risk exposure of an AUP workaround is known. This leads to the problem statement. Many organisations do not have a formal way in which to assess the information security risks posed by workarounds associated with their Acceptable Use Policies, and related procedures. This study provides a solution to the identified problem through the primary objective, to develop a Risk Assessment Matrix for Information Security Workarounds associated with Acceptable Use Policies, and related procedures. Four secondary research objectives were proposed to achieve the primary research objective. The first secondary objective determines the role of information security risk management and how it relates to information security governance through the utilisation of a literature review. The second secondary objective firstly utilises a literature review to determine the role that the AUP and its related procedures play within an organisation, followed by a content analysis which identifies the key content that should be considered in a comprehensive AUP. The third secondary objective determines the factors that influence the use of AUP workarounds within an organisation through the utilisation of a literature review. Lastly, the fourth secondary objective utilises a literature review to determine the key components required for the development of the risk assessment matrix for information security workarounds. In addition, critical reasoning is used to create the risk assessment matrix for information security workarounds. The solution to this study contributes to the body of knowledge by proposing a risk assessment matrix to assess the information security risk exposure of AUP workarounds and find possible efficiency gains while keeping information security risk exposure to a minimum. , Thesis (MTech) -- Faculty of Engineering, the Built Environment and Information Technology , Information Technology, 2022
- Full Text:
- Date Issued: 2022-04
Using information visualization to support the self-management of type 2 diabetes mellitus
- Authors: Nauder, Meggan Kate
- Date: 2022-04
- Subjects: Information visualization , Diabetics --Treatment --South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55711 , vital:53409
- Description: The globally increasing number of individuals suffering from Type 2 Diabetes Mellitus (T2DM), a completely preventable incurable disease of the pancreas, highlights the need for an effective tool for users to understand the relationship between their behaviours and the effect that those behaviours can have on their blood glucose levels (BGLs). There are few Information Visualisation (IV) tools available that can be used to reduce the cognition required to understand correlations between behaviour and BGLs. Existing tools require time-consuming, lengthy inputs and provide simple visualisations that do not show correlations. This leads to ineffective self-management of T2DM. Information Visualisation (IV) techniques can be used to support effective self-management of T2DM and reduce the cognition required to interpret DM data. Suitable IV techniques were identified and used to visualize T2DM data to aid in the self-management of the disease. Temporal charts, i.e. The Bar, Pie and Line Chart as well as heat maps, were selected as the most appropriate IV techniques to visualize T2DM data as they support time-series data well. A prototype, MedicMetric was created as an IV tool for visualizing T2DM data. MedicMetric incorporated three designed charts, namely the Change Rate Line View, the Radial Progress View, and the Annotated Line View. The Change Rate Line View and Annotated Line View both used line IV techniques, while the Radial Progress View made use of the bar IV technique. The Change Rate Line View performed the worst overall. A usability evaluation was conducted to compare these techniques and to determine which technique is most suitable for visualizing T2DM data. The results leaned significantly in favour of the Annotated Line View. This view is most similar to the line charts typically used in other IV tools. For this reason, the MedicMetric app was briefly compared to the MySygr and Diabetes:M application. In effectiveness and efficiency, MedicMetric and MySugr obtained almost identical results. However, participants indicated that MedicMetric supported their tasks using the Visual Information Seeking Mantra (VISM) the best overall, with 100% of participants stating that they would prefer to use the MedicMetric application. Several usability problems were identified with the IV techniques and they were addressed shortly after the study was complete. Overall participants were most satisfied with the Annotated Line View. , Thesis (MSc) -- Faculty of Science, Computing Sciences, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Nauder, Meggan Kate
- Date: 2022-04
- Subjects: Information visualization , Diabetics --Treatment --South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55711 , vital:53409
- Description: The globally increasing number of individuals suffering from Type 2 Diabetes Mellitus (T2DM), a completely preventable incurable disease of the pancreas, highlights the need for an effective tool for users to understand the relationship between their behaviours and the effect that those behaviours can have on their blood glucose levels (BGLs). There are few Information Visualisation (IV) tools available that can be used to reduce the cognition required to understand correlations between behaviour and BGLs. Existing tools require time-consuming, lengthy inputs and provide simple visualisations that do not show correlations. This leads to ineffective self-management of T2DM. Information Visualisation (IV) techniques can be used to support effective self-management of T2DM and reduce the cognition required to interpret DM data. Suitable IV techniques were identified and used to visualize T2DM data to aid in the self-management of the disease. Temporal charts, i.e. The Bar, Pie and Line Chart as well as heat maps, were selected as the most appropriate IV techniques to visualize T2DM data as they support time-series data well. A prototype, MedicMetric was created as an IV tool for visualizing T2DM data. MedicMetric incorporated three designed charts, namely the Change Rate Line View, the Radial Progress View, and the Annotated Line View. The Change Rate Line View and Annotated Line View both used line IV techniques, while the Radial Progress View made use of the bar IV technique. The Change Rate Line View performed the worst overall. A usability evaluation was conducted to compare these techniques and to determine which technique is most suitable for visualizing T2DM data. The results leaned significantly in favour of the Annotated Line View. This view is most similar to the line charts typically used in other IV tools. For this reason, the MedicMetric app was briefly compared to the MySygr and Diabetes:M application. In effectiveness and efficiency, MedicMetric and MySugr obtained almost identical results. However, participants indicated that MedicMetric supported their tasks using the Visual Information Seeking Mantra (VISM) the best overall, with 100% of participants stating that they would prefer to use the MedicMetric application. Several usability problems were identified with the IV techniques and they were addressed shortly after the study was complete. Overall participants were most satisfied with the Annotated Line View. , Thesis (MSc) -- Faculty of Science, Computing Sciences, 2022
- Full Text:
- Date Issued: 2022-04
Zooplankton dynamics of Algoa Bay (South Africa) under varying oceanographic conditions
- Authors: Bizani,Mfundo
- Date: 2022-04
- Subjects: Marine zooplankton -- South Africa , Climate changes
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55943 , vital:54554
- Description: the ecological significance of ocean plankton in terms of nutrient cycling and energy transfer is widely recognised, as is their mechanistic link with both oceanographic processes and climate. Consequently, plankton are widely regarded as sentinels of climate change, principally owing to their responsiveness to changing environmental conditions. Developing an understanding of the ecological as well as socio-economic consequences associated with changes in marine plankton dynamics has emerged as a key issue worldwide. Though many exciting advances in this respect have been attained with the aid of long-term plankton time series (>50 y), global environmental datasets and innovative meta-analyses, building deep knowledge of regional bio-physical dynamics and responses to specific perturbed states remains an essential component of the collective effort. Algoa Bay, situated on the warmtemperate south-east coast of South Africa presents a unique opportunity to study key elements of plankton ecology relevant to climate change problems in the regional sense. The embayment is locally subjected to frequent wind-driven upwelling and regionally, to periodic mesoscale oceanographic forcing (e.g., large solitary meanders, Agulhas Current intrusions), all of which culminate in a complex physical and biogeochemical environment. Using zooplankton as the focal component and drawing from a multi-year monthly dataset incorporating a bay-scale sampling framework, the present study addressed three key hypotheses pertaining to 1) drivers of spatio-temporal variability, 2) biomass rate of change over temporal scales using time-series analyses, and 3) community responses to a bay-scale biological perturbation event. Zooplankton biomass exhibited prominent seasonal patterns with bimodal peaks corresponding with near-consistent year-to-year autumn and spring blooms. Overall, the spatial trend showed no heterogeneity, though statistical significance between-station variability was noted per season. An analytical framework involving generalised additive models revealed zooplankton spatial heterogeneity in Algoa Bay to be a function of seasonal variation in a suite of physicochemical variables, including the combined effects of temperature, salinity, dissolved oxygen, total nitrogen and silicate, but not ammonium, phosphate or chlorophyll-a (as proxy for phytoplankton). Fronts (including river plumes), warm water intrusion from the Agulhas Current, and wind-driven upwelling were postulated to be key driving forces. Structural breaks analysis performed on station-specific time series revealed significant incremental increases in zooplankton biomass over time, which in turn, corresponded with a gradual decrease in thermocline depth. The most pronounced increasing effect was associated with a period (2013– 14) of amplified land-derived nutrient input and increasing harmful algal bloom (HAB) activity. , Thesis (PhD) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Bizani,Mfundo
- Date: 2022-04
- Subjects: Marine zooplankton -- South Africa , Climate changes
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55943 , vital:54554
- Description: the ecological significance of ocean plankton in terms of nutrient cycling and energy transfer is widely recognised, as is their mechanistic link with both oceanographic processes and climate. Consequently, plankton are widely regarded as sentinels of climate change, principally owing to their responsiveness to changing environmental conditions. Developing an understanding of the ecological as well as socio-economic consequences associated with changes in marine plankton dynamics has emerged as a key issue worldwide. Though many exciting advances in this respect have been attained with the aid of long-term plankton time series (>50 y), global environmental datasets and innovative meta-analyses, building deep knowledge of regional bio-physical dynamics and responses to specific perturbed states remains an essential component of the collective effort. Algoa Bay, situated on the warmtemperate south-east coast of South Africa presents a unique opportunity to study key elements of plankton ecology relevant to climate change problems in the regional sense. The embayment is locally subjected to frequent wind-driven upwelling and regionally, to periodic mesoscale oceanographic forcing (e.g., large solitary meanders, Agulhas Current intrusions), all of which culminate in a complex physical and biogeochemical environment. Using zooplankton as the focal component and drawing from a multi-year monthly dataset incorporating a bay-scale sampling framework, the present study addressed three key hypotheses pertaining to 1) drivers of spatio-temporal variability, 2) biomass rate of change over temporal scales using time-series analyses, and 3) community responses to a bay-scale biological perturbation event. Zooplankton biomass exhibited prominent seasonal patterns with bimodal peaks corresponding with near-consistent year-to-year autumn and spring blooms. Overall, the spatial trend showed no heterogeneity, though statistical significance between-station variability was noted per season. An analytical framework involving generalised additive models revealed zooplankton spatial heterogeneity in Algoa Bay to be a function of seasonal variation in a suite of physicochemical variables, including the combined effects of temperature, salinity, dissolved oxygen, total nitrogen and silicate, but not ammonium, phosphate or chlorophyll-a (as proxy for phytoplankton). Fronts (including river plumes), warm water intrusion from the Agulhas Current, and wind-driven upwelling were postulated to be key driving forces. Structural breaks analysis performed on station-specific time series revealed significant incremental increases in zooplankton biomass over time, which in turn, corresponded with a gradual decrease in thermocline depth. The most pronounced increasing effect was associated with a period (2013– 14) of amplified land-derived nutrient input and increasing harmful algal bloom (HAB) activity. , Thesis (PhD) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-04
A framework to prepare an information security awareness and training programme for a provincial government department in the Eastern Cape, South Africa.
- Authors: Potelwa, Zandile
- Date: 2022-03
- Subjects: Information technology--Security measures. , Employees--Training of. , Data encryption (Computer science)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22289 , vital:52016
- Description: Provincial government departments do not have good audit reports on the information security section. The underlying issues are human factors associated with employee interaction with Information and Communication Technology (ICT). The problem to be addressed is how a provincial government needs to focus on employees’ information security awareness so that there is a residual improvement in information security culture to realise unqualified government audits for information security. A case study approach that focused on the provincial government departments in the Eastern Cape Province was used. The primary data was collected using semi-structured interviews containing questions related to information security awareness. Microsoft Teams was used to conduct online semi-structured interviews with 12 provincial government IT staff from two identified provincial departments. The data was analysed using thematic analysis and MS Excel for coding. The findings then were used to determine the outcome of this study which is the framework for preparing an information security awareness programme. The outcome of the study was achieved by condensing the themes that emerged in both the primary and secondary data. The framework was then explained as a way of recommending the importance of preparing information security awareness and training programmes in changing information security behaviour. The derived artefact of this study is an information security awareness framework that can be utilised in a provincial government department to increase the awareness of information security amongst government employees. The contribution of this study is a framework based on the Protection Motivation Theory and the Organisational Culture, to ascertain employees’ actions in relation to information risks and threats; requirements for preparing an information security awareness program for public sector employees and to determine the requirements to be considered when building information security culture in provincial government departments. The proposed framework can then be used to establish an information security culture within the government departments, which will mitigate security risks and threats. The significance of this study as per the constructs of ISA and training show that it can challenge thinking of how ISA can be prepared for not only provincial government but also for state-owned entities or local government. , Thesis (MCom) (Information Systems) -- University of Fort Hare, 2022
- Full Text:
- Date Issued: 2022-03
- Authors: Potelwa, Zandile
- Date: 2022-03
- Subjects: Information technology--Security measures. , Employees--Training of. , Data encryption (Computer science)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22289 , vital:52016
- Description: Provincial government departments do not have good audit reports on the information security section. The underlying issues are human factors associated with employee interaction with Information and Communication Technology (ICT). The problem to be addressed is how a provincial government needs to focus on employees’ information security awareness so that there is a residual improvement in information security culture to realise unqualified government audits for information security. A case study approach that focused on the provincial government departments in the Eastern Cape Province was used. The primary data was collected using semi-structured interviews containing questions related to information security awareness. Microsoft Teams was used to conduct online semi-structured interviews with 12 provincial government IT staff from two identified provincial departments. The data was analysed using thematic analysis and MS Excel for coding. The findings then were used to determine the outcome of this study which is the framework for preparing an information security awareness programme. The outcome of the study was achieved by condensing the themes that emerged in both the primary and secondary data. The framework was then explained as a way of recommending the importance of preparing information security awareness and training programmes in changing information security behaviour. The derived artefact of this study is an information security awareness framework that can be utilised in a provincial government department to increase the awareness of information security amongst government employees. The contribution of this study is a framework based on the Protection Motivation Theory and the Organisational Culture, to ascertain employees’ actions in relation to information risks and threats; requirements for preparing an information security awareness program for public sector employees and to determine the requirements to be considered when building information security culture in provincial government departments. The proposed framework can then be used to establish an information security culture within the government departments, which will mitigate security risks and threats. The significance of this study as per the constructs of ISA and training show that it can challenge thinking of how ISA can be prepared for not only provincial government but also for state-owned entities or local government. , Thesis (MCom) (Information Systems) -- University of Fort Hare, 2022
- Full Text:
- Date Issued: 2022-03
A mobile based control system for smart homes
- Authors: Tshimanga, Danny Kazadi
- Date: 2022-03
- Subjects: Smart power grids , Home automation
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22632 , vital:52606
- Description: A Smart Home Control System can provide a secure home, convenience, comfort, and interactivity of life in a particular home. The system can enable the automatic controlling of a house via a Smart Phone. These systems are becoming vital and widely used in homes to improve conditions of life. Most commercial home automation systems are expensive and their maintenance would require experts who understand the underlying implementation of the systems. This study developed a mobile-based home automation system prototype. The system was developed using the waterfall model methodology. To evaluate the developed system, the study used a simulation method. Ten trials were conducted to determine the performance of the implemented system. The mean time to failure was used to evaluate the system’ reliability. The system’s performance analysis revealed that the developed system performed better than the two other approaches; the Bluetooth and ZigBee. The developed system showed a 0 percent error, while the Bluetooth had 8 percent error and ZigBee 6 percent error. The reliability results showed the average lifespan of assets in the system before they could fail. Knowing the lifespan of an asset before it fails can help in reducing downtime of the system by planning or scheduling maintenance and develop an improved maintenance strategy. , Thesis (MSc) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2022-03
- Authors: Tshimanga, Danny Kazadi
- Date: 2022-03
- Subjects: Smart power grids , Home automation
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22632 , vital:52606
- Description: A Smart Home Control System can provide a secure home, convenience, comfort, and interactivity of life in a particular home. The system can enable the automatic controlling of a house via a Smart Phone. These systems are becoming vital and widely used in homes to improve conditions of life. Most commercial home automation systems are expensive and their maintenance would require experts who understand the underlying implementation of the systems. This study developed a mobile-based home automation system prototype. The system was developed using the waterfall model methodology. To evaluate the developed system, the study used a simulation method. Ten trials were conducted to determine the performance of the implemented system. The mean time to failure was used to evaluate the system’ reliability. The system’s performance analysis revealed that the developed system performed better than the two other approaches; the Bluetooth and ZigBee. The developed system showed a 0 percent error, while the Bluetooth had 8 percent error and ZigBee 6 percent error. The reliability results showed the average lifespan of assets in the system before they could fail. Knowing the lifespan of an asset before it fails can help in reducing downtime of the system by planning or scheduling maintenance and develop an improved maintenance strategy. , Thesis (MSc) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2022-03
Accountability of the police to provincial governments in South Africa: a comparative analysis of law and practice in the eastern and Western Cape Provinces
- Authors: Tyabazayo, Phumlani
- Date: 2022-03
- Subjects: Police -- South Africa , Police power , Police administration
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22456 , vital:52323
- Description: The 2012 Constitutional Court matter between the national minister of police and the premier of the Western Cape (Minister of Police v Premier of the Western Cape 2013 (12) BCLR 1365 (CC)) concerning the exercise of provincial policing powers as provided for in chapter 11 of the Constitution of South Africa laid bare the tension between the national and provincial governments in the exercise of these powers. Despite the Court’s determination of the dispute, there are still grey areas regarding the constitutional obligations of the provinces with regard to policing. The result has been a lack of clarity and uniformity in the exercise of policing powers by various provinces in South Africa. Based on documentary analysis and interviews, this study explores the parameters of the powers of provinces in policing matters as well as the extent of accountability of the police to provincial governments in South Africa by comparing the law and practice in the Eastern Cape and Western Cape provinces. The study argues that if provinces are to effectively exercise their constitutional powers in policing matters, there needs to be a degree of uniformity in and a mutual understanding of the extent and parameters of provincial policing powers. Only when they clearly understand their powers in policing matters will provincial governments be able to develop legal and policy frameworks to consolidate their powers and effectively hold the police accountable. The study considers whether the current policing powers afforded to provinces are adequate and if not, whether constitutional reform is needed to afford provinces more and clearer policing powers. Furthermore, within the context of participatory democracy, the study takes an in-depth look into the accountability role of Community Police Forums. The study finds that, generally, provincial governments fall short in fulfilling the obligations imposed on them by the Constitution. The study further finds that, in practice, there is still uncertainty about the role of the provincial governments and the Civilian Secretariat for Police in policing matters. Among the recommendations of this study is that section 206 (1) of the Constitution be amended to give provinces power to formulate policing policy in respect of issues peculiar to a particular province. The study also proposes a model to enhance the exercise of provincial policing powers by provincial governments in South Africa. , Thesis (PhD) -- Faculty of Law, 2022
- Full Text:
- Date Issued: 2022-03
- Authors: Tyabazayo, Phumlani
- Date: 2022-03
- Subjects: Police -- South Africa , Police power , Police administration
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/22456 , vital:52323
- Description: The 2012 Constitutional Court matter between the national minister of police and the premier of the Western Cape (Minister of Police v Premier of the Western Cape 2013 (12) BCLR 1365 (CC)) concerning the exercise of provincial policing powers as provided for in chapter 11 of the Constitution of South Africa laid bare the tension between the national and provincial governments in the exercise of these powers. Despite the Court’s determination of the dispute, there are still grey areas regarding the constitutional obligations of the provinces with regard to policing. The result has been a lack of clarity and uniformity in the exercise of policing powers by various provinces in South Africa. Based on documentary analysis and interviews, this study explores the parameters of the powers of provinces in policing matters as well as the extent of accountability of the police to provincial governments in South Africa by comparing the law and practice in the Eastern Cape and Western Cape provinces. The study argues that if provinces are to effectively exercise their constitutional powers in policing matters, there needs to be a degree of uniformity in and a mutual understanding of the extent and parameters of provincial policing powers. Only when they clearly understand their powers in policing matters will provincial governments be able to develop legal and policy frameworks to consolidate their powers and effectively hold the police accountable. The study considers whether the current policing powers afforded to provinces are adequate and if not, whether constitutional reform is needed to afford provinces more and clearer policing powers. Furthermore, within the context of participatory democracy, the study takes an in-depth look into the accountability role of Community Police Forums. The study finds that, generally, provincial governments fall short in fulfilling the obligations imposed on them by the Constitution. The study further finds that, in practice, there is still uncertainty about the role of the provincial governments and the Civilian Secretariat for Police in policing matters. Among the recommendations of this study is that section 206 (1) of the Constitution be amended to give provinces power to formulate policing policy in respect of issues peculiar to a particular province. The study also proposes a model to enhance the exercise of provincial policing powers by provincial governments in South Africa. , Thesis (PhD) -- Faculty of Law, 2022
- Full Text:
- Date Issued: 2022-03
An appraisal of strategies to mitigate related to non-communicable diseases of the eye: a case study of Michael Mapongwane Health Clinic in Khayelitsha, Western Cape Metro District
- Authors: Ngcebetsha, Avela Ayanda
- Date: 2022-03
- Subjects: Chronically ill--Care , Ophthalmic nursing
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22908 , vital:53186
- Description: Preventive and curative eye-care services are a critical component of care for patients diagnosed with chronic diseases. The South African constitution guarantees health as a fundamental human right of all citizens. While most chronically ill patients are managed at the primary health care centers, eye care services are currently contracted to private service providers. The extent to which people, especially the chronically ill patients, have access to eye-care service under the current structure is less understood. The study aims to establish the effectiveness and sustainability of the eye-care service delivery model at the Michael Mapongwane CHC, with specific reference to access to eye-care services. Specifically, the study examined the rate and determinants of eye-care service utilisation, assess user’s satisfaction and perspectives of primary health workers and private service providers regarding the current structure of eye-care services. The study adopted a descriptive and explanatory design, which involved a survey and semi-structured interviews. The survey was conducted among 423 patients attending the two primary health centers selected for this study. Patients with chronic illness were recruited over a period of one month. Overall, 365 patients with chronic illness and 58 patients without chronic illness took part in the study. Descriptive and inferential statistics were used to analyse the quantitative date. Purposive sampling was used to select nine health workers and 10 private eye-care service providers for the semi-structured interviews. The data obtained were transcribed and coded. Thematic content analysis was performed on the qualitative data. The results show that less than half of the respondents (n=168) had ever had an eye test, and an even lower proportion (n=115) had had an eye test in the past two years. Age, female sex, formal rural dwelling, marital status, and income were significantly associated with ever having an eye test done. The results reveal a gross inequality in access to eye care test. Only 19.2% of patients diagnosed with hypertension had had their eyes examined. Even fewer proportions of the patients (8.5%) had had their eyes examined during or after diagnosis for hypertension. Likewise, only one in three patients diagnosed with diabetes has had their eyes examined before or after they were diagnosed with diabetes. The majority of patients who had used the services affirmed that it was easy to access eye care services. While most respondents agreed that waiting time to make an appointment was not too long, over half of them affirmed that waiting to see an eye doctor was too long. Most users were reasonably satisfied with the eye care services received. Primary health care providers highlighted challenges such as work overload, poor infrastructure, and patient’s forgetfulness of the appointment dates as factors affecting access to eye care services in their clinic. The primary challenges the private eye-care service providers experienced were small rooms or inappropriate clinic rooms, language barrier and inadequate support from the clinics. In conclusion, this study has shown that access to preventive and curative health care services was among patients attending primary health care centres, and especially those with chronic illness. The current structure of eye care services makes it difficult for patients to access care and for providers to provide quality care. , Thesis (MPH) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-03
- Authors: Ngcebetsha, Avela Ayanda
- Date: 2022-03
- Subjects: Chronically ill--Care , Ophthalmic nursing
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22908 , vital:53186
- Description: Preventive and curative eye-care services are a critical component of care for patients diagnosed with chronic diseases. The South African constitution guarantees health as a fundamental human right of all citizens. While most chronically ill patients are managed at the primary health care centers, eye care services are currently contracted to private service providers. The extent to which people, especially the chronically ill patients, have access to eye-care service under the current structure is less understood. The study aims to establish the effectiveness and sustainability of the eye-care service delivery model at the Michael Mapongwane CHC, with specific reference to access to eye-care services. Specifically, the study examined the rate and determinants of eye-care service utilisation, assess user’s satisfaction and perspectives of primary health workers and private service providers regarding the current structure of eye-care services. The study adopted a descriptive and explanatory design, which involved a survey and semi-structured interviews. The survey was conducted among 423 patients attending the two primary health centers selected for this study. Patients with chronic illness were recruited over a period of one month. Overall, 365 patients with chronic illness and 58 patients without chronic illness took part in the study. Descriptive and inferential statistics were used to analyse the quantitative date. Purposive sampling was used to select nine health workers and 10 private eye-care service providers for the semi-structured interviews. The data obtained were transcribed and coded. Thematic content analysis was performed on the qualitative data. The results show that less than half of the respondents (n=168) had ever had an eye test, and an even lower proportion (n=115) had had an eye test in the past two years. Age, female sex, formal rural dwelling, marital status, and income were significantly associated with ever having an eye test done. The results reveal a gross inequality in access to eye care test. Only 19.2% of patients diagnosed with hypertension had had their eyes examined. Even fewer proportions of the patients (8.5%) had had their eyes examined during or after diagnosis for hypertension. Likewise, only one in three patients diagnosed with diabetes has had their eyes examined before or after they were diagnosed with diabetes. The majority of patients who had used the services affirmed that it was easy to access eye care services. While most respondents agreed that waiting time to make an appointment was not too long, over half of them affirmed that waiting to see an eye doctor was too long. Most users were reasonably satisfied with the eye care services received. Primary health care providers highlighted challenges such as work overload, poor infrastructure, and patient’s forgetfulness of the appointment dates as factors affecting access to eye care services in their clinic. The primary challenges the private eye-care service providers experienced were small rooms or inappropriate clinic rooms, language barrier and inadequate support from the clinics. In conclusion, this study has shown that access to preventive and curative health care services was among patients attending primary health care centres, and especially those with chronic illness. The current structure of eye care services makes it difficult for patients to access care and for providers to provide quality care. , Thesis (MPH) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-03