Evaluation of the toxicity of secondary metabolites in Solanum incanum L. to advance community knowledge
- Authors: Zivanayi, William
- Date: 2023-04
- Subjects: Solanum -- Zimbabwe , Pesticides -- Toxicology , Medicinal plants
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/61018 , vital:69686
- Description: The effects of pests and the need to produce adequate food have influenced small-scale farmers in disadvantaged communities to adopt and utilise natural plant pesticides to improve harvests in many Southern African Development Communities. However, the phytochemistry associated with these indigenous plants’ pesticide activity still needs to be explored. The lack of evidence of scientific knowledge of the plant species has caused a lot of health issues among the users of indigenous plant pesticides. Solanum incanum is among the plants utilised to control cabbage aphids in Mkoba village, Zimbabwe. Solanum species are known for their steroidal compounds which comprise glycoalkaloids and saponins. This study evaluated the knowledge, opinions, and attitudes of the vegetable peasant farming community in Gweru regarding their use of the indigenous plant (S. incanum) as a pesticide. The study also reported the phytochemical profiling, structural characterisation of the isolated compounds, and biological and pesticidal activity evaluation of phytochemicals isolated from S. incanum. A descriptive survey was carried out to assess the knowledge, attitude, and practices of a conveniently sampled group of vegetable farmers in Mkoba village who use S. incanum as a pesticide. Forty-nine respondents comprised of 19 males and 30 females of ages ranging from 15 to above 60 years took part in the study by answering an open and closed-ended questionnaire. The survey revealed that parents and neighbours were instrumental in disseminating pesticidal information in the community. Brassica napus were the most grown.vegetable and vulnerable to cabbage aphids. Mixed opinions amongst the respondents varied regarding the health and environmental impact of S. incanum as a pesticide. Seventy-five percent (75%) of the respondents supported the use of S. incanum as a pesticide whilst 25% claimed that the use of S. incanum was the source of the health problems experienced in the community. The survey demonstrated that (45)91% of the farmers displayed poor practices regarding the disposal of empty pesticide containers and the use of personal protective clothing. The most prevalent symptoms in the community were skin rash, nausea, headache, and poor vision and these symptoms were common in the age group 30 to 60 years. , Thesis (PhD) -- Faculty of Science, School of biomolecular and Chemical Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Zivanayi, William
- Date: 2023-04
- Subjects: Solanum -- Zimbabwe , Pesticides -- Toxicology , Medicinal plants
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/61018 , vital:69686
- Description: The effects of pests and the need to produce adequate food have influenced small-scale farmers in disadvantaged communities to adopt and utilise natural plant pesticides to improve harvests in many Southern African Development Communities. However, the phytochemistry associated with these indigenous plants’ pesticide activity still needs to be explored. The lack of evidence of scientific knowledge of the plant species has caused a lot of health issues among the users of indigenous plant pesticides. Solanum incanum is among the plants utilised to control cabbage aphids in Mkoba village, Zimbabwe. Solanum species are known for their steroidal compounds which comprise glycoalkaloids and saponins. This study evaluated the knowledge, opinions, and attitudes of the vegetable peasant farming community in Gweru regarding their use of the indigenous plant (S. incanum) as a pesticide. The study also reported the phytochemical profiling, structural characterisation of the isolated compounds, and biological and pesticidal activity evaluation of phytochemicals isolated from S. incanum. A descriptive survey was carried out to assess the knowledge, attitude, and practices of a conveniently sampled group of vegetable farmers in Mkoba village who use S. incanum as a pesticide. Forty-nine respondents comprised of 19 males and 30 females of ages ranging from 15 to above 60 years took part in the study by answering an open and closed-ended questionnaire. The survey revealed that parents and neighbours were instrumental in disseminating pesticidal information in the community. Brassica napus were the most grown.vegetable and vulnerable to cabbage aphids. Mixed opinions amongst the respondents varied regarding the health and environmental impact of S. incanum as a pesticide. Seventy-five percent (75%) of the respondents supported the use of S. incanum as a pesticide whilst 25% claimed that the use of S. incanum was the source of the health problems experienced in the community. The survey demonstrated that (45)91% of the farmers displayed poor practices regarding the disposal of empty pesticide containers and the use of personal protective clothing. The most prevalent symptoms in the community were skin rash, nausea, headache, and poor vision and these symptoms were common in the age group 30 to 60 years. , Thesis (PhD) -- Faculty of Science, School of biomolecular and Chemical Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Exploring African vs Western values: A Case Study of Managing Conflict of Interest in the Public Sector
- Authors: Nkohla, Tumelo Luvuyo
- Date: 2023-04
- Subjects: Public works , Conflict of interest
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62275 , vital:72369
- Description: This study explored African versus (vs) Western values on managing conflict of interest in the Eastern Cape Department of Public Works and Infrastructure (ECPDWI). This research was evoked by the ethical challenges of gift giving, procurement and recruitment processes, which give rise to conflicts of interest. These challenges are caused by difficulties in applying public sector policy instruments to manage such conflicts of interest. These policies were developed on foundations of Western values, whereas most public servants subscribe to an African value system, hence there is conflict. This study explored the implications of these values in the management of conflicts of interest. The study was conducted using qualitative research and purposive sampling was used. Semi-structured interviews were used to collect data and a 60% participation rate was attained. This research enhances policy instruments to manage conflicts of interest within ECDPWI. Reflexive thematic analysis was used to analyse, interpret and report on the data. Findings were reported under thematic headings of gift giving and receiving, conflicts of interest in procurement and recruitment, including relevance of the code of conduct and policies. The study found dichotomous views on gift giving from African and Western values perspectives. African perspectives believe that conflict of interest policies do not reflect the values of Ubuntu, which drives Africans’ human behaviour. The study observed that the mechanisms of managing conflicts of interest in procurement and recruitment are inadequate and ineffective from both an African and Western perspective. The study established that a code of conduct was irrelevant in managing conflicts of interest from African perspectives. Recommendations included amongst others, a review of the gift policy to consider observations identified on African gift giving, structured awareness programmes, strengthened accountability on managing conflicts of interest within procurement and recruitment respectively. Additionally, the development of a framework to manage conflict of interest within ECDPWI taking into consideration both African and Western values perspectives, was recommended. This study enhances scholarly debate on exploring African ethics within a business context, by suggesting a synthesis of African and Western values towards managing conflicts of interest in the South African public sector. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Nkohla, Tumelo Luvuyo
- Date: 2023-04
- Subjects: Public works , Conflict of interest
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62275 , vital:72369
- Description: This study explored African versus (vs) Western values on managing conflict of interest in the Eastern Cape Department of Public Works and Infrastructure (ECPDWI). This research was evoked by the ethical challenges of gift giving, procurement and recruitment processes, which give rise to conflicts of interest. These challenges are caused by difficulties in applying public sector policy instruments to manage such conflicts of interest. These policies were developed on foundations of Western values, whereas most public servants subscribe to an African value system, hence there is conflict. This study explored the implications of these values in the management of conflicts of interest. The study was conducted using qualitative research and purposive sampling was used. Semi-structured interviews were used to collect data and a 60% participation rate was attained. This research enhances policy instruments to manage conflicts of interest within ECDPWI. Reflexive thematic analysis was used to analyse, interpret and report on the data. Findings were reported under thematic headings of gift giving and receiving, conflicts of interest in procurement and recruitment, including relevance of the code of conduct and policies. The study found dichotomous views on gift giving from African and Western values perspectives. African perspectives believe that conflict of interest policies do not reflect the values of Ubuntu, which drives Africans’ human behaviour. The study observed that the mechanisms of managing conflicts of interest in procurement and recruitment are inadequate and ineffective from both an African and Western perspective. The study established that a code of conduct was irrelevant in managing conflicts of interest from African perspectives. Recommendations included amongst others, a review of the gift policy to consider observations identified on African gift giving, structured awareness programmes, strengthened accountability on managing conflicts of interest within procurement and recruitment respectively. Additionally, the development of a framework to manage conflict of interest within ECDPWI taking into consideration both African and Western values perspectives, was recommended. This study enhances scholarly debate on exploring African ethics within a business context, by suggesting a synthesis of African and Western values towards managing conflicts of interest in the South African public sector. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Exploring strategies that enhance a safety culture in mitigating the number of safety incidents at Eskom.
- Authors: Ngeva, Unathi Felix
- Date: 2023-04
- Subjects: safety culture , Electrical injuries , Safety incidents
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62260 , vital:72368
- Description: Ever since its emergence during the 1980’s, safety culture has become a topical subject in high-risk industries such as electricity generation, construction, mining, and many others. Eskom in particular has paid a considerable amount of attention on the issue of safety in general. Although the company has made safety one of its focal points through its SHEQ Policy and various interventions in an endeavour to promote safety culture in the organisation, its safety statistics are showing that safety incidents are continuing to happen. To commence the inquiry, a literature review was conducted on secondary sources which highlighted various causes of employee injury-related incidents at Eskom which range from fall on same level, motor vehicle accidents, struck by, and others. In an endeavour to assist the company to enhance a safety culture so that it can achieve its value of ‘Zero Harm’, this study focuses on different modalities that can be developed to improve the status quo. It examines ways that can be followed towards improving the safety relationship between management and employees which in turn will result in an improved overall safety culture of the organisation. In so doing, managements’ perceptions regarding the safety culture that is currently in place as well as the employee’s attitudes towards safety standards were used to gain insights into the organisation’s safety climate on safety behaviour while examining the existing safety culture. To realise the empirical objectives of the study, a pragmatic research paradigm was adopted. This approach involved the use of both a qualitative research method, namely, a focus group, and a quantitative research method, namely, a questionnaire. Quantitative data was analysed using SPSS version 26. Meanwhile, data collected during interviews was analysed using a thematic analysis. Key findings from this study point mainly to the level of mistrust between employees and the safety leadership, which, if left unattended will have a knock-on-effect not only to the safety culture but to the entire organisational culture. Based on the meaningful results uncovered by this study, various recommendations that are aimed at enhancing a safety culture in the organisation were made. Among these recommendations, it was suggested that coaching and mentorship programmes be introduced and allow employees to champion some of the safety programmes to enhance morale and safety accountability. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Ngeva, Unathi Felix
- Date: 2023-04
- Subjects: safety culture , Electrical injuries , Safety incidents
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62260 , vital:72368
- Description: Ever since its emergence during the 1980’s, safety culture has become a topical subject in high-risk industries such as electricity generation, construction, mining, and many others. Eskom in particular has paid a considerable amount of attention on the issue of safety in general. Although the company has made safety one of its focal points through its SHEQ Policy and various interventions in an endeavour to promote safety culture in the organisation, its safety statistics are showing that safety incidents are continuing to happen. To commence the inquiry, a literature review was conducted on secondary sources which highlighted various causes of employee injury-related incidents at Eskom which range from fall on same level, motor vehicle accidents, struck by, and others. In an endeavour to assist the company to enhance a safety culture so that it can achieve its value of ‘Zero Harm’, this study focuses on different modalities that can be developed to improve the status quo. It examines ways that can be followed towards improving the safety relationship between management and employees which in turn will result in an improved overall safety culture of the organisation. In so doing, managements’ perceptions regarding the safety culture that is currently in place as well as the employee’s attitudes towards safety standards were used to gain insights into the organisation’s safety climate on safety behaviour while examining the existing safety culture. To realise the empirical objectives of the study, a pragmatic research paradigm was adopted. This approach involved the use of both a qualitative research method, namely, a focus group, and a quantitative research method, namely, a questionnaire. Quantitative data was analysed using SPSS version 26. Meanwhile, data collected during interviews was analysed using a thematic analysis. Key findings from this study point mainly to the level of mistrust between employees and the safety leadership, which, if left unattended will have a knock-on-effect not only to the safety culture but to the entire organisational culture. Based on the meaningful results uncovered by this study, various recommendations that are aimed at enhancing a safety culture in the organisation were made. Among these recommendations, it was suggested that coaching and mentorship programmes be introduced and allow employees to champion some of the safety programmes to enhance morale and safety accountability. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Factors affecting pinniped skull morphology
- Authors: Penaluna, Julia Elizabeth
- Date: 2023-04
- Subjects: hybridisation -- South Africa , Sexual dimorphism (Animals) , Craniology
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61306 , vital:70077
- Description: Morphologies have evolved due to trade-offs between competing selective pressures. This is especially true for the skull. Not only does it contain the brain and the organs that are responsible for sensory function, but it is also contains components that play important roles in feeding, breathing, balance, defence, aggression and communication. The pinnipeds, a group of species that has evolved from terrestrial origins and became adapted to the marine environment, are under numerous selective pressures within the marine environment. These species have had to evolve in order to capture and process food underwater, and to dive. In addition, they are also characterised by substantial sexual size dimorphism in some species. Pinnipeds also make use of numerous marine and haul-out habitats with varying characteristics and complexity. Hybridisation has been recorded among pinnipeds, resulting in the production of hybrid offspring with characteristics that are different to their parent species. The aim of the study was to investigate the effect of these life history characteristics on skull and mandible morphology of pinniped species using three dimensional geometric morphometrics. To achieve this, 43 skull and 15 mandible 3D landmarks were collected using a Microscribe G2X digitizer with 0.2mm accuracy, on the skull and mandibles of 17 species of pinnipeds across three families, and one hybrid species. In total, 96 specimens across these species were examined. Data on the different life history characteristics of each species were collected from the literature. These data were plotted onto the PCA results in order to create and visually compare minimum convex polygons for each life history category. The results found that phylogeny, feeding strategy and sexual dimorphism were the most important factors in explaining differences in pinniped skull and mandible shape and size. may have resulted in these changes. Similarly, the inclusion of more species, covering a broader range of life histories may be beneficial. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Penaluna, Julia Elizabeth
- Date: 2023-04
- Subjects: hybridisation -- South Africa , Sexual dimorphism (Animals) , Craniology
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61306 , vital:70077
- Description: Morphologies have evolved due to trade-offs between competing selective pressures. This is especially true for the skull. Not only does it contain the brain and the organs that are responsible for sensory function, but it is also contains components that play important roles in feeding, breathing, balance, defence, aggression and communication. The pinnipeds, a group of species that has evolved from terrestrial origins and became adapted to the marine environment, are under numerous selective pressures within the marine environment. These species have had to evolve in order to capture and process food underwater, and to dive. In addition, they are also characterised by substantial sexual size dimorphism in some species. Pinnipeds also make use of numerous marine and haul-out habitats with varying characteristics and complexity. Hybridisation has been recorded among pinnipeds, resulting in the production of hybrid offspring with characteristics that are different to their parent species. The aim of the study was to investigate the effect of these life history characteristics on skull and mandible morphology of pinniped species using three dimensional geometric morphometrics. To achieve this, 43 skull and 15 mandible 3D landmarks were collected using a Microscribe G2X digitizer with 0.2mm accuracy, on the skull and mandibles of 17 species of pinnipeds across three families, and one hybrid species. In total, 96 specimens across these species were examined. Data on the different life history characteristics of each species were collected from the literature. These data were plotted onto the PCA results in order to create and visually compare minimum convex polygons for each life history category. The results found that phylogeny, feeding strategy and sexual dimorphism were the most important factors in explaining differences in pinniped skull and mandible shape and size. may have resulted in these changes. Similarly, the inclusion of more species, covering a broader range of life histories may be beneficial. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Factors influencing consumers’ adoption of chatbot assisted marketing activities in the South African banking industry
- Authors: Rusike, Christabel
- Date: 2023-04
- Subjects: Banks and banking -- South Africa , Consumer movements
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62380 , vital:72643
- Description: In a world where technology is evolving at an alarming rate there have been so many advancements and developments in the marketing field and how consumers engage in accessing products and services. In general, a great body of literature on information technology shows evidence that areas such as mobile banking and organisational technology adoption have been explored. However, limited attention has been dedicated to consumer adoption or acceptance stages of technology, particularly chatbots in the South African context. Apart from that, during the peak of the Covid 19 pandemic, consumers had to adjust to mainly doing transactions online as there was a restriction in accessing banking halls. Given this backdrop, the aim of this study is to address this particular research gap through investigating factors influencing consumers’ adoption of chatbot assisted marketing activities in the South African banking industry. The research was inspired and constructed upon three research theories, namely Technology Acceptance Model (TAM), The Diffusion of Innovation Theory (DoIT) and Unified Theory of Acceptance and Use of Technology 2 (UTAUT2). Based on these theories, a hypothesised model was formulated with eight independent variables, namely Perceived Usefulness, Perceived Ease of Use, Facilitating Conditions, Price Value, Hedonic Motivation, Social Influence, Perceived Compatibility and Relative Advantage. The dependent variable was put forward as Chatbot Adoption. Descriptive and explanatory research designs were selected for this study, utilising a quantitative research methodology. In addressing the objectives of the study, secondary data was collected through the internet, magazines, newspapers, articles, journals and books to aid in completing the literature chapters and construction of the measuring instrument. Primary data was also collected through a self-administered questionnaire which was created on QuestionPro and the link was distributed to the respondents. The population under study were consumers of the banking industry products and services in South Africa. The target respondents consisted of consumers who hold valid bank account and have used or experienced online activities within the banking sector. A non-probability vii sampling method through convenience and snowball sampling was adopted to recruit the respondents. Data were obtained from 151 usable survey questionnaires. The data collected from the respondents was coded and captured on a Microsoft excel spreadsheet which was then followed by analysing of data using IBM SPSS version 16. From the analysed results, all the suggested independent variables were retained as the respondents confirm in varying degrees the influence on behaviour that the factors have. The study found that the eight independent factors have practical and statistically significant correlation with consumer adoption of chatbot assisted marketing activities within the South African banking industry. In addition, the inferential ranking of the factors indicates that Relative Advantage, Perceived Usefulness and Price Value fall under one group of significant factors perceived by consumers in their decision to adopt chatbot assisted marketing activities. It can therefore be concluded that it is useful for the banking industry to implement the identified factors and recommendations offered to enhance the use of chatbots in consumers’ online banking activities as the responses obtained are in general favourable. The study thus contributes theoretically and practically to the body of knowledge particularly digital marketing through chatbots in the banking sector. Therefore, the findings can be useful for financial marketing, digital banking and the suggested model can help the marketing and artificial intelligence departments in the banking industry in the decision-making process. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Rusike, Christabel
- Date: 2023-04
- Subjects: Banks and banking -- South Africa , Consumer movements
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62380 , vital:72643
- Description: In a world where technology is evolving at an alarming rate there have been so many advancements and developments in the marketing field and how consumers engage in accessing products and services. In general, a great body of literature on information technology shows evidence that areas such as mobile banking and organisational technology adoption have been explored. However, limited attention has been dedicated to consumer adoption or acceptance stages of technology, particularly chatbots in the South African context. Apart from that, during the peak of the Covid 19 pandemic, consumers had to adjust to mainly doing transactions online as there was a restriction in accessing banking halls. Given this backdrop, the aim of this study is to address this particular research gap through investigating factors influencing consumers’ adoption of chatbot assisted marketing activities in the South African banking industry. The research was inspired and constructed upon three research theories, namely Technology Acceptance Model (TAM), The Diffusion of Innovation Theory (DoIT) and Unified Theory of Acceptance and Use of Technology 2 (UTAUT2). Based on these theories, a hypothesised model was formulated with eight independent variables, namely Perceived Usefulness, Perceived Ease of Use, Facilitating Conditions, Price Value, Hedonic Motivation, Social Influence, Perceived Compatibility and Relative Advantage. The dependent variable was put forward as Chatbot Adoption. Descriptive and explanatory research designs were selected for this study, utilising a quantitative research methodology. In addressing the objectives of the study, secondary data was collected through the internet, magazines, newspapers, articles, journals and books to aid in completing the literature chapters and construction of the measuring instrument. Primary data was also collected through a self-administered questionnaire which was created on QuestionPro and the link was distributed to the respondents. The population under study were consumers of the banking industry products and services in South Africa. The target respondents consisted of consumers who hold valid bank account and have used or experienced online activities within the banking sector. A non-probability vii sampling method through convenience and snowball sampling was adopted to recruit the respondents. Data were obtained from 151 usable survey questionnaires. The data collected from the respondents was coded and captured on a Microsoft excel spreadsheet which was then followed by analysing of data using IBM SPSS version 16. From the analysed results, all the suggested independent variables were retained as the respondents confirm in varying degrees the influence on behaviour that the factors have. The study found that the eight independent factors have practical and statistically significant correlation with consumer adoption of chatbot assisted marketing activities within the South African banking industry. In addition, the inferential ranking of the factors indicates that Relative Advantage, Perceived Usefulness and Price Value fall under one group of significant factors perceived by consumers in their decision to adopt chatbot assisted marketing activities. It can therefore be concluded that it is useful for the banking industry to implement the identified factors and recommendations offered to enhance the use of chatbots in consumers’ online banking activities as the responses obtained are in general favourable. The study thus contributes theoretically and practically to the body of knowledge particularly digital marketing through chatbots in the banking sector. Therefore, the findings can be useful for financial marketing, digital banking and the suggested model can help the marketing and artificial intelligence departments in the banking industry in the decision-making process. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Factors that contribute to an optimal omnichannel retail experience: A South African perspective
- Authors: Hopa, Tandazile
- Date: 2023-04
- Subjects: Business planning , Consumer satisfaction
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61339 , vital:70374
- Description: The increase in the number of channels driven by technology trajectory over the years have led to a change in customer behaviour. Customers move around different retailer platforms during a single purchase; even so customers still expect a superior and seamless customer experience while navigating these channels. The present study built on studies conducted in countries such as China, Spain, India, United Kingdom amongst others to determine if the learnings from these countries can be applied in the South African context. This study used an interpretivist phenomenological approach and interviewed a qualitative sample of participants to gain insights on their experiences while shopping in these retailers. This study will assist Information Technology managers with prioritisation of their technology roadmaps. This study will also contribute to computer science studies because programmers will have a context of a customer’s perspective when developing omnichannel solutions. Lastly, the study can be used by governments and policy makers in developing national strategic plans relating to shared economy because the study highlights the need to omnichannel retailing in remote areas. The findings from the research were summarised into five themes customer experience, convenience, product, support, and security. The optimal South African omnichannel retail experience is one that allows the customer to seamlessly move across channels by integrating the retailing mix elements of product, place, promotion, price. To achieve this experience, retailers must integrate the customer’s profile information and ensure that the customer’s payment details are secure and are able to seamlessly login in all the retailer platforms. Contrary to the researcher’s expectations, South African customers do not expect an omnichannel support. They expect to keep online support separate from in-store support. , Thesis (MA) -- Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Hopa, Tandazile
- Date: 2023-04
- Subjects: Business planning , Consumer satisfaction
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61339 , vital:70374
- Description: The increase in the number of channels driven by technology trajectory over the years have led to a change in customer behaviour. Customers move around different retailer platforms during a single purchase; even so customers still expect a superior and seamless customer experience while navigating these channels. The present study built on studies conducted in countries such as China, Spain, India, United Kingdom amongst others to determine if the learnings from these countries can be applied in the South African context. This study used an interpretivist phenomenological approach and interviewed a qualitative sample of participants to gain insights on their experiences while shopping in these retailers. This study will assist Information Technology managers with prioritisation of their technology roadmaps. This study will also contribute to computer science studies because programmers will have a context of a customer’s perspective when developing omnichannel solutions. Lastly, the study can be used by governments and policy makers in developing national strategic plans relating to shared economy because the study highlights the need to omnichannel retailing in remote areas. The findings from the research were summarised into five themes customer experience, convenience, product, support, and security. The optimal South African omnichannel retail experience is one that allows the customer to seamlessly move across channels by integrating the retailing mix elements of product, place, promotion, price. To achieve this experience, retailers must integrate the customer’s profile information and ensure that the customer’s payment details are secure and are able to seamlessly login in all the retailer platforms. Contrary to the researcher’s expectations, South African customers do not expect an omnichannel support. They expect to keep online support separate from in-store support. , Thesis (MA) -- Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Factors that influence the success of total quality management (TGM) practices in a South African (SA) automotive organisation
- Authors: Makone, Tlangelani Sandra
- Date: 2023-04
- Subjects: Automotive Industry , Total Quality Management
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62113 , vital:71996
- Description: The South African automotive industry is a key driver of the economy and industrialisation of the country. The Covid-19 pandemic has had adverse effects on many industries globally. In the automotive industry, Covid-19 affected the supply chain resulting in a shortage of semi-conductors, which are essential in the microchips used in the vehicle assembly process. The delays in supply resulted in decreased production volumes and thus a decline in sales which has had an adverse effect on the economic growth of the industry. Therefore, the automotive industry must be sustainable and agile to be competitive globally. This study aimed to focus on total quality management (TQM) practices as a tool for competitive advantage. TQM is significant for sustainability, business continuity and competitive advantage. The study highlights the relevance of TQM practices in the global automotive industry and in South Africa where the study was performed. The organisations at the base of the study are multinational original equipment manufacturers (OEMs) that manufacture passenger vehicles for both local and export markets. This quantitative study investigated the relationship between leadership support, quality culture, education and training, structure and resources, and strategic quality plan as the independent variables and TQM practices as the dependent variable. A closed-ended online survey with 70 respondents was employed to collect the data from the OEMs. The findings are that there is a positive and significant correlation between the variables. Leadership support, quality culture and strategic quality planning have more influence on the success of TQM practices. Education and training, and structure and resources have a moderate influence on TQM practices. Managers in quality assurance and production in automotive organisations need to prioritise leadership support, quality culture and strategic quality planning for TQM practices to succeed. , Thesis (MA) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Makone, Tlangelani Sandra
- Date: 2023-04
- Subjects: Automotive Industry , Total Quality Management
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62113 , vital:71996
- Description: The South African automotive industry is a key driver of the economy and industrialisation of the country. The Covid-19 pandemic has had adverse effects on many industries globally. In the automotive industry, Covid-19 affected the supply chain resulting in a shortage of semi-conductors, which are essential in the microchips used in the vehicle assembly process. The delays in supply resulted in decreased production volumes and thus a decline in sales which has had an adverse effect on the economic growth of the industry. Therefore, the automotive industry must be sustainable and agile to be competitive globally. This study aimed to focus on total quality management (TQM) practices as a tool for competitive advantage. TQM is significant for sustainability, business continuity and competitive advantage. The study highlights the relevance of TQM practices in the global automotive industry and in South Africa where the study was performed. The organisations at the base of the study are multinational original equipment manufacturers (OEMs) that manufacture passenger vehicles for both local and export markets. This quantitative study investigated the relationship between leadership support, quality culture, education and training, structure and resources, and strategic quality plan as the independent variables and TQM practices as the dependent variable. A closed-ended online survey with 70 respondents was employed to collect the data from the OEMs. The findings are that there is a positive and significant correlation between the variables. Leadership support, quality culture and strategic quality planning have more influence on the success of TQM practices. Education and training, and structure and resources have a moderate influence on TQM practices. Managers in quality assurance and production in automotive organisations need to prioritise leadership support, quality culture and strategic quality planning for TQM practices to succeed. , Thesis (MA) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Fiscal consolidation and economic growth: a comparison of South Africa and selected three OECD countries
- Mphaphuli, Zeb Junior Rabelani
- Authors: Mphaphuli, Zeb Junior Rabelani
- Date: 2023-04
- Subjects: Fiscal consolidation , Economic growth -- South Africa , OECD countries
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62142 , vital:72001
- Description: The study examined the relationship between fiscal consolidation and economic growth in South Africa (SA) in comparison with the Organisation for Economic Cooperation and Development (OECD) countries. The study emphasizes the use of fiscal consolidation as a tool to stimulate economic growth and reduce the budget deficit, focusing on the reforms of public revenues and expenditures. Moreover, the study employed the panel Autoregressive Distributed Lag (PARDL) model to explore the relationship between fiscal consolidation and economic growth in SA and three OECD countries from the period 1990 - 2018. The cointegration analysis confirmed the existence of cointegration between the variables which suggested that there is a long-run relationship among the variables. As a result, both long and short run dynamic models were evaluated. The result of the study shows that fiscal consolidation positively affects economic growth in South Africa in the long run, whilst in OECD countries fiscal consolidation negatively affects economic growth, both in the short and long run. Low government debt in South Africa due to lower deficit translated to a higher economic growth whilst higher debt level in OECD countries due to higher government spending translated to higher economic growth, one of the main differences in the relationship between fiscal consolidation and economic growth in South Africa and OECD countries is their spending pattern. Majority of South Africa’s budget is spent on inefficient state-owned enterprises, which have accounted for the bulk of government contingent liabilities, resulting in high borrowing costs, which consequently lead to high borrowing cost, thus the rising central government debt as a percentage of GDP. Unlike in SA, OECD countries spend towards capital expenditure specifically in priority areas such as infrastructure, Technology, and transport hence their high debt levels result in higher economic growth. In attempt to stimulate South Africa's economic growth, it is recommended that South Africa implement effective fiscal consolidations based on expenditure adjustments rather than revenue adjustments, as expenditure adjustments are more likely to reduce deficits and debt-to-GDP ratios and are more effective. In addition, the South African fiscal stimulus package can be used to invest more in infrastructure to increase private capital accumulation and stimulate economic growth. However, South Africa must exercise caution when reducing expenditures to avoid a reduction in development spending, which could lead to a decline in unemployment. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Mphaphuli, Zeb Junior Rabelani
- Date: 2023-04
- Subjects: Fiscal consolidation , Economic growth -- South Africa , OECD countries
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62142 , vital:72001
- Description: The study examined the relationship between fiscal consolidation and economic growth in South Africa (SA) in comparison with the Organisation for Economic Cooperation and Development (OECD) countries. The study emphasizes the use of fiscal consolidation as a tool to stimulate economic growth and reduce the budget deficit, focusing on the reforms of public revenues and expenditures. Moreover, the study employed the panel Autoregressive Distributed Lag (PARDL) model to explore the relationship between fiscal consolidation and economic growth in SA and three OECD countries from the period 1990 - 2018. The cointegration analysis confirmed the existence of cointegration between the variables which suggested that there is a long-run relationship among the variables. As a result, both long and short run dynamic models were evaluated. The result of the study shows that fiscal consolidation positively affects economic growth in South Africa in the long run, whilst in OECD countries fiscal consolidation negatively affects economic growth, both in the short and long run. Low government debt in South Africa due to lower deficit translated to a higher economic growth whilst higher debt level in OECD countries due to higher government spending translated to higher economic growth, one of the main differences in the relationship between fiscal consolidation and economic growth in South Africa and OECD countries is their spending pattern. Majority of South Africa’s budget is spent on inefficient state-owned enterprises, which have accounted for the bulk of government contingent liabilities, resulting in high borrowing costs, which consequently lead to high borrowing cost, thus the rising central government debt as a percentage of GDP. Unlike in SA, OECD countries spend towards capital expenditure specifically in priority areas such as infrastructure, Technology, and transport hence their high debt levels result in higher economic growth. In attempt to stimulate South Africa's economic growth, it is recommended that South Africa implement effective fiscal consolidations based on expenditure adjustments rather than revenue adjustments, as expenditure adjustments are more likely to reduce deficits and debt-to-GDP ratios and are more effective. In addition, the South African fiscal stimulus package can be used to invest more in infrastructure to increase private capital accumulation and stimulate economic growth. However, South Africa must exercise caution when reducing expenditures to avoid a reduction in development spending, which could lead to a decline in unemployment. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Foreign aid and Human Development Indicators: Evidence from South Africa
- Authors: Mwimba, Inambao
- Date: 2023-04
- Subjects: Human development indicators , Official Development Aid
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62162 , vital:72003
- Description: The purpose of this study is to determine whether foreign aid influences the quality of life in South Africa. To do so, the study analyses the relationship between foreign aid and the human development index (HDI). HDI consists of three other indices: the index of wellbeing, the index of education, and the index of income. To measure the relationship between foreign aid and HDI, five Autoregressive Distributed Lag (ARDL) models are used in estimating the effect of foreign aid on HDI as well as life expectancy, education level, unemployment, and GDP per capita from 1993 to 2019. Income, population density, and credit are given to the private sector are part of the empirical models as controlled variables. The results show that no significant relationship exists between foreign aid and HDI, education, and GDP, while aid is linked to a lower life expectancy rate and unemployment. These findings imply that aid can increase the HDI in South Africa by contributing to a decreased unemployment rate, and thus policy makers should establish concrete plans and develop economic strategies that focus on creating incentives that attract more aid, especially in the short run. This can lead to a decrease in the unemployment rate, which is often regarded as South Africa’s biggest economic issue. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Mwimba, Inambao
- Date: 2023-04
- Subjects: Human development indicators , Official Development Aid
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/62162 , vital:72003
- Description: The purpose of this study is to determine whether foreign aid influences the quality of life in South Africa. To do so, the study analyses the relationship between foreign aid and the human development index (HDI). HDI consists of three other indices: the index of wellbeing, the index of education, and the index of income. To measure the relationship between foreign aid and HDI, five Autoregressive Distributed Lag (ARDL) models are used in estimating the effect of foreign aid on HDI as well as life expectancy, education level, unemployment, and GDP per capita from 1993 to 2019. Income, population density, and credit are given to the private sector are part of the empirical models as controlled variables. The results show that no significant relationship exists between foreign aid and HDI, education, and GDP, while aid is linked to a lower life expectancy rate and unemployment. These findings imply that aid can increase the HDI in South Africa by contributing to a decreased unemployment rate, and thus policy makers should establish concrete plans and develop economic strategies that focus on creating incentives that attract more aid, especially in the short run. This can lead to a decrease in the unemployment rate, which is often regarded as South Africa’s biggest economic issue. , Thesis (Ma) -- Faculty of Faculty of Business and Economic Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Gamification Recommendations to address the user experience of the security education and training course at the Nelson Mandela University
- Authors: Mdiniso, Thandokazi
- Date: 2023-04
- Subjects: Gamification , Human-computer interaction , Safety training programs, Nelson Mandela University
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/65053 , vital:74012
- Description: The use of technology alone cannot ensure a secure environment for organisations. Consideration should be given to the human aspect of cybersecurity. User errors are rooted in a lack of awareness and ignorance. A security awareness programme allows organisations to equip employees with the knowledge required to safeguard their data. The Security Education and Training (SEAT) course provided at the Nelson Mandela University seeks to bridge the gap by providing the necessary tools to equip students to be better employees for their future employers. However, the SEAT course is fairly outdated and has a poor user experience. Gamification has therefore been considered to address the user experience of the SEAT course. Incorporating game elements can help to increase the positive user experience of a system. User experience designers use gamification and well-chosen game elements to improve user experience. People enjoy using systems that are full of excitement, and that challenge and encourage a competitive spirit. The primary objective of this study is to provide recommendations for the gamification of the user experience of the SEAT course at the Nelson Mandela University. The primary objective is further divided into several secondary objectives that aim to address the proposed problem. The secondary objectives are to investigate user experience, identifying the most common user experience evaluation methods; to understand gamification and to identify relevant game elements that could enhance the user experience of the SEAT course at the Nelson Mandela University; to evaluate the user experience of the Nelson Mandela University SEAT course and to identify opportunities to implement the identified game elements; to implement the identified game elements into the selected module of the SEAT course. A literature review was conducted to gather an understanding of user experience, user experience evaluation methods, gamification, and game elements. A prototype was created using the information gathered in the literature review, based on a component of the SEAT course. The prototype incorporates different game elements that foster motivation in users. The prototype is used as a proof-of-concept, demonstrating that gamification can address the user experience of the SEAT course. Self-evaluations were conducted on both the SEAT course and the prototype, as a first step in comparing the user experience of the original SEAT course with the proof-of-concept prototype. Finally, gamification recommendations were proposed to address the user experience of the SEAT course. , Thesis (MIT) -- Faculty of Engineering, the Built Environment and Information Technology, School of Information Techonology, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Mdiniso, Thandokazi
- Date: 2023-04
- Subjects: Gamification , Human-computer interaction , Safety training programs, Nelson Mandela University
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/65053 , vital:74012
- Description: The use of technology alone cannot ensure a secure environment for organisations. Consideration should be given to the human aspect of cybersecurity. User errors are rooted in a lack of awareness and ignorance. A security awareness programme allows organisations to equip employees with the knowledge required to safeguard their data. The Security Education and Training (SEAT) course provided at the Nelson Mandela University seeks to bridge the gap by providing the necessary tools to equip students to be better employees for their future employers. However, the SEAT course is fairly outdated and has a poor user experience. Gamification has therefore been considered to address the user experience of the SEAT course. Incorporating game elements can help to increase the positive user experience of a system. User experience designers use gamification and well-chosen game elements to improve user experience. People enjoy using systems that are full of excitement, and that challenge and encourage a competitive spirit. The primary objective of this study is to provide recommendations for the gamification of the user experience of the SEAT course at the Nelson Mandela University. The primary objective is further divided into several secondary objectives that aim to address the proposed problem. The secondary objectives are to investigate user experience, identifying the most common user experience evaluation methods; to understand gamification and to identify relevant game elements that could enhance the user experience of the SEAT course at the Nelson Mandela University; to evaluate the user experience of the Nelson Mandela University SEAT course and to identify opportunities to implement the identified game elements; to implement the identified game elements into the selected module of the SEAT course. A literature review was conducted to gather an understanding of user experience, user experience evaluation methods, gamification, and game elements. A prototype was created using the information gathered in the literature review, based on a component of the SEAT course. The prototype incorporates different game elements that foster motivation in users. The prototype is used as a proof-of-concept, demonstrating that gamification can address the user experience of the SEAT course. Self-evaluations were conducted on both the SEAT course and the prototype, as a first step in comparing the user experience of the original SEAT course with the proof-of-concept prototype. Finally, gamification recommendations were proposed to address the user experience of the SEAT course. , Thesis (MIT) -- Faculty of Engineering, the Built Environment and Information Technology, School of Information Techonology, 2023
- Full Text:
- Date Issued: 2023-04
Health and safety coordination between main contractors and subcontractors at the Medupi power station project
- Authors: Nkqayana, Yolisa Jennifer
- Date: 2023-04
- Subjects: Contractors' operations , Subcontractors (Medupi power station) , Limpopo (South Africa)
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/65119 , vital:74026
- Description: Health and safety (H&S) coordination between main contractors and subcontractors on construction projects is one of the most important factors for the success of a project. The aim of this study was to develop a framework to improve H&S coordination between main contractors and subcontractors on the Medupi power station project, and the objectives were to ascertain the H&S measures used to assess the H&S risks towards the reduction of hazards and injuries; assess the enforcement mechanisms of H&S regulations, and examine the challenges encountered in terms of the coordination of H&S at the Medupi power station project. Moreover, this research addressed the significant issue of possible ineffective coordination of H&S guidelines and policies in the South African construction industry, as well as at the Medupi power station project. This research will help to alleviate incidents and accidents at the Medupi power station project. The research entailed a review of the literature pertaining to H&S, and a questionnaire survey that was used to gain insight into the working conditions on site and to evaluate the state of H&S coordination, its implications, and compliance with the Construction Regulations by all parties concerned. A purposive sampling method was adopted to survey contractors working on the Medupi power station project. The research findings revealed that inadequate H&S communication between main contractors and subcontractors negatively affected project performance as it resulted in the occurrence of accidents on site. The research findings also revealed that most respondents, both main contractors and subcontractors, were aware, and clearly understood the required H&S practices. However, a small number indicated that they were uncertain with respect to such practices. This indicated that there was a gap in terms of H&S coordination between the main contractors and subcontractors on the Medupi power station project. The research findings further revealed that lack of commitment to H&S practices, inadequate communication / consultation relative to the implementation of the H&S management system (H&SMS), inadequate resources as well as inadequate contractor relations between the main contractors and subcontractors constituted barriers in terms of the H&SMS. 5 Recommendations included a need for the following relative to H&S: management leadership, worker participation, hazard identification and control, education and training, programme evaluation and improvement, and optimum communication and coordination for employers on multi-employer work sites. , Thesis (MSc) -- Faculty of Engineering, the Built Environment and Technology, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Nkqayana, Yolisa Jennifer
- Date: 2023-04
- Subjects: Contractors' operations , Subcontractors (Medupi power station) , Limpopo (South Africa)
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/65119 , vital:74026
- Description: Health and safety (H&S) coordination between main contractors and subcontractors on construction projects is one of the most important factors for the success of a project. The aim of this study was to develop a framework to improve H&S coordination between main contractors and subcontractors on the Medupi power station project, and the objectives were to ascertain the H&S measures used to assess the H&S risks towards the reduction of hazards and injuries; assess the enforcement mechanisms of H&S regulations, and examine the challenges encountered in terms of the coordination of H&S at the Medupi power station project. Moreover, this research addressed the significant issue of possible ineffective coordination of H&S guidelines and policies in the South African construction industry, as well as at the Medupi power station project. This research will help to alleviate incidents and accidents at the Medupi power station project. The research entailed a review of the literature pertaining to H&S, and a questionnaire survey that was used to gain insight into the working conditions on site and to evaluate the state of H&S coordination, its implications, and compliance with the Construction Regulations by all parties concerned. A purposive sampling method was adopted to survey contractors working on the Medupi power station project. The research findings revealed that inadequate H&S communication between main contractors and subcontractors negatively affected project performance as it resulted in the occurrence of accidents on site. The research findings also revealed that most respondents, both main contractors and subcontractors, were aware, and clearly understood the required H&S practices. However, a small number indicated that they were uncertain with respect to such practices. This indicated that there was a gap in terms of H&S coordination between the main contractors and subcontractors on the Medupi power station project. The research findings further revealed that lack of commitment to H&S practices, inadequate communication / consultation relative to the implementation of the H&S management system (H&SMS), inadequate resources as well as inadequate contractor relations between the main contractors and subcontractors constituted barriers in terms of the H&SMS. 5 Recommendations included a need for the following relative to H&S: management leadership, worker participation, hazard identification and control, education and training, programme evaluation and improvement, and optimum communication and coordination for employers on multi-employer work sites. , Thesis (MSc) -- Faculty of Engineering, the Built Environment and Technology, 2023
- Full Text:
- Date Issued: 2023-04
Implementation of technological innovations within the South African construction industry
- Authors: Koopman, Kelly Leigh
- Date: 2023-04
- Subjects: Technological innovations , construction industry -- South Africa
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/60960 , vital:69301
- Description: In South Africa the construction industry has grown by more than 15% per annum over the past five-years and the construction industry is facing several pressures to decrease costs, improve productivity and to develop a competitive edge in terms of quality of service and customer satisfaction. Faced with a growing demand for service delivery the industry must seek new and improved ways to stay competitive in this market space. By effectively analysing the construction market all role players within the AEC industry can adopt new trends and techniques being implemented by either their foreign counterparts or direct competitors. One of these trends within the industry is technological innovations; each designed to play a beneficial role in construction industry advancements. It is clear that our industry is moving forward at an alarming rate, yet our foreign counterparts seem to be one step ahead. Based on the 2010 Soccer World Cup it was clear that the South African AEC Industry had the ability to conform and deliver on world class infrastructure, yet we still seem to have a slow adoption rate surrounding technological innovations. Investigating the depth of knowledge based around the most popular technological innovations currently being implemented can provide a clear view as to what S.A industry role players see as potentially profitable within our marketplace and the steps that could be taken to provide further research pertaining to those technological innovations which are being overlooked. Establishing the most prominent barriers preventing technological adoption within the South African AEC Industry can effectively be compared with those faced by foreign counterparts to mirror their solutions to similar problems. Finally, by establishing whether resistance to a changing environment plays a vital role in the hindrance to technological adoption one can access the extent to which the AEC Industry may effectively change based on a projected industry time frame. , Thesis (MSc) -- Faculty of Engineering, the Built Environment and Technology, School of the Built Environment, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Koopman, Kelly Leigh
- Date: 2023-04
- Subjects: Technological innovations , construction industry -- South Africa
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/60960 , vital:69301
- Description: In South Africa the construction industry has grown by more than 15% per annum over the past five-years and the construction industry is facing several pressures to decrease costs, improve productivity and to develop a competitive edge in terms of quality of service and customer satisfaction. Faced with a growing demand for service delivery the industry must seek new and improved ways to stay competitive in this market space. By effectively analysing the construction market all role players within the AEC industry can adopt new trends and techniques being implemented by either their foreign counterparts or direct competitors. One of these trends within the industry is technological innovations; each designed to play a beneficial role in construction industry advancements. It is clear that our industry is moving forward at an alarming rate, yet our foreign counterparts seem to be one step ahead. Based on the 2010 Soccer World Cup it was clear that the South African AEC Industry had the ability to conform and deliver on world class infrastructure, yet we still seem to have a slow adoption rate surrounding technological innovations. Investigating the depth of knowledge based around the most popular technological innovations currently being implemented can provide a clear view as to what S.A industry role players see as potentially profitable within our marketplace and the steps that could be taken to provide further research pertaining to those technological innovations which are being overlooked. Establishing the most prominent barriers preventing technological adoption within the South African AEC Industry can effectively be compared with those faced by foreign counterparts to mirror their solutions to similar problems. Finally, by establishing whether resistance to a changing environment plays a vital role in the hindrance to technological adoption one can access the extent to which the AEC Industry may effectively change based on a projected industry time frame. , Thesis (MSc) -- Faculty of Engineering, the Built Environment and Technology, School of the Built Environment, 2023
- Full Text:
- Date Issued: 2023-04
Implementation of technological innovations within the South African construction industry
- Authors: Koopman, Kelly Leigh
- Date: 2023-04
- Subjects: Technological innovations , Design-build process (Construction industry) – South Africa
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/60623 , vital:66245
- Description: In South Africa the construction industry has grown by more than 15% per annum over the past five-years and the construction industry is facing several pressures to decrease costs, improve productivity and to develop a competitive edge in terms of quality of service and customer satisfaction. Faced with a growing demand for service delivery the industry must seek new and improved ways to stay competitive in this market space. By effectively analysing the construction market all role players within the AEC industry can adopt new trends and techniques being implemented by either their foreign counterparts or direct competitors. One of these trends within the industry is technological innovations; each designed to play a beneficial role in construction industry advancements. It is clear that our industry is moving forward at an alarming rate, yet our foreign counterparts seem to be one step ahead. Based on the 2010 Soccer World Cup it was clear that the South African AEC Industry had the ability to conform and deliver on world class infrastructure, yet we still seem to have a slow adoption rate surrounding technological innovations. Investigating the depth of knowledge based around the most popular technological innovations currently being implemented can provide a clear view as to what S.A industry role players see as potentially profitable within our marketplace and the steps that could be taken to provide further research pertaining to those technological innovations which are being overlooked. Establishing the most prominent barriers preventing technological adoption within the South African AEC Industry can effectively be compared with those faced by foreign counterparts to mirror their solutions to similar problems. Finally, by establishing whether resistance to a changing environment plays a vital role in the hindrance to technological adoption one can access the extent to which the AEC Industry may effectively change based on a projected industry time frame. , Thesis (MSc) -- Faculty of Faculty of Engineering, the Built Environment and Technology, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Koopman, Kelly Leigh
- Date: 2023-04
- Subjects: Technological innovations , Design-build process (Construction industry) – South Africa
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/60623 , vital:66245
- Description: In South Africa the construction industry has grown by more than 15% per annum over the past five-years and the construction industry is facing several pressures to decrease costs, improve productivity and to develop a competitive edge in terms of quality of service and customer satisfaction. Faced with a growing demand for service delivery the industry must seek new and improved ways to stay competitive in this market space. By effectively analysing the construction market all role players within the AEC industry can adopt new trends and techniques being implemented by either their foreign counterparts or direct competitors. One of these trends within the industry is technological innovations; each designed to play a beneficial role in construction industry advancements. It is clear that our industry is moving forward at an alarming rate, yet our foreign counterparts seem to be one step ahead. Based on the 2010 Soccer World Cup it was clear that the South African AEC Industry had the ability to conform and deliver on world class infrastructure, yet we still seem to have a slow adoption rate surrounding technological innovations. Investigating the depth of knowledge based around the most popular technological innovations currently being implemented can provide a clear view as to what S.A industry role players see as potentially profitable within our marketplace and the steps that could be taken to provide further research pertaining to those technological innovations which are being overlooked. Establishing the most prominent barriers preventing technological adoption within the South African AEC Industry can effectively be compared with those faced by foreign counterparts to mirror their solutions to similar problems. Finally, by establishing whether resistance to a changing environment plays a vital role in the hindrance to technological adoption one can access the extent to which the AEC Industry may effectively change based on a projected industry time frame. , Thesis (MSc) -- Faculty of Faculty of Engineering, the Built Environment and Technology, 2023
- Full Text:
- Date Issued: 2023-04
Inner-city regeneration in South Africa : a property development approach
- Authors: Chidzambwa, Overt
- Date: 2023-04
- Subjects: Regeneration -- South Africa , Real estate development
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/60578 , vital:65894
- Description: Worldwide, the topic of inner-city decay and regeneration continues to attract a lot of attention from various parties and organisations. This is largely due to the fact that Central Business Districts (CBDs) remain the heartbeat of any city’s economic, social and political vibrancy. It therefore remains an ongoing process for the government and private stakeholders to keep on devising strategies aimed at revitalising the inner-city. The problem of urban decay is however experienced more in the developing third world and is characterised by high unemployment rates, high crime rates, depopulation, desolate-looking landscapes, abandonment of buildings, split families amongst others. Urban decay does not have one single cause, but rather a combination of many, including poor urban planning, redlining, poverty, suburbanization, and racial discrimination. These factors have resulted in urban sprawl as property owners preferred to migrate from the increasingly toxic social and economic environment that now became of the inner-city. The study seeks to investigate the current state of urban decay in South African CBDs with a case study of Gqeberha metro city, it also investigates current efforts and measures in place for regeneration and lastly, recommendations that have been put and continue to be put in place for inner-city regeneration. The state of inner-city infrastructure, property development finance options, town planning requirements and regulations and the investment case are other factors that have been investigated. Various other aspects of inner-city dynamics in the context of property development have been explored with findings from extensive literature review and structured interviews enabling the researcher to come up with recommendations for sustainable inner-city regeneration. , Thesis (MSBE) --Faculty of Engineering Built Environment and Information Technology, School of Built Environment and Civil Engineering, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Chidzambwa, Overt
- Date: 2023-04
- Subjects: Regeneration -- South Africa , Real estate development
- Language: English
- Type: Master's theses , Thesis
- Identifier: http://hdl.handle.net/10948/60578 , vital:65894
- Description: Worldwide, the topic of inner-city decay and regeneration continues to attract a lot of attention from various parties and organisations. This is largely due to the fact that Central Business Districts (CBDs) remain the heartbeat of any city’s economic, social and political vibrancy. It therefore remains an ongoing process for the government and private stakeholders to keep on devising strategies aimed at revitalising the inner-city. The problem of urban decay is however experienced more in the developing third world and is characterised by high unemployment rates, high crime rates, depopulation, desolate-looking landscapes, abandonment of buildings, split families amongst others. Urban decay does not have one single cause, but rather a combination of many, including poor urban planning, redlining, poverty, suburbanization, and racial discrimination. These factors have resulted in urban sprawl as property owners preferred to migrate from the increasingly toxic social and economic environment that now became of the inner-city. The study seeks to investigate the current state of urban decay in South African CBDs with a case study of Gqeberha metro city, it also investigates current efforts and measures in place for regeneration and lastly, recommendations that have been put and continue to be put in place for inner-city regeneration. The state of inner-city infrastructure, property development finance options, town planning requirements and regulations and the investment case are other factors that have been investigated. Various other aspects of inner-city dynamics in the context of property development have been explored with findings from extensive literature review and structured interviews enabling the researcher to come up with recommendations for sustainable inner-city regeneration. , Thesis (MSBE) --Faculty of Engineering Built Environment and Information Technology, School of Built Environment and Civil Engineering, 2023
- Full Text:
- Date Issued: 2023-04
Interactive visualisation of electricity usage in smart environments
- Ngwenya, Moreblessing Tafadzwa
- Authors: Ngwenya, Moreblessing Tafadzwa
- Date: 2023-04
- Subjects: Smart environment -- south Africa , Application software -- Development , Intelligent buildings
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61477 , vital:70687
- Description: Saving electricity is a trending topic due to the electricity challenges that are being faced globally. Smart environments are environments that are equipped with physical objects, which include computers, sensors, actuators, smartphones, and wearable devices interconnected together through the Internet of Things. The Internet of Things provides a network to achieve communication, and computation abilities to provide individuals with smart services anytime, and anywhere. Rapid developments in information technology have increased the number of smart appliances being used, leading to increased electricity usage. Devices and appliances in Smart Environments continue to consume electricity even when not in use, because of the standby function. The problems arise as the electricity consumption of the standby function accumulates to large amounts. Effective communication through visualisation of the electricity consumption in a Smart Environment provides a viable solution to reducing the consumption of electricity. This research aimed to design and developed a visualisation system that successfully communicates electricity consumption to the user using a variety of visualisation techniques. The Design Science Research Methodology was used to address the research questions and was used to iteratively design and develop an energy usage visualisation system. The visualisation system was created for the Smart Lab at the Nelson Mandela University's Department of Computing Sciences. A usability study was conducted to assess the usability and efficacy of the system. The system was found to be usable and effective in communicating power usage to potential customers, since the participants were able to complete the tasks in a short amount of time. The positive results show that visualisation can aid in communicating electricity usage to customers, resulting in a possible reduction in electricity consumption and improved decision-making. , Thesis (MSc) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Ngwenya, Moreblessing Tafadzwa
- Date: 2023-04
- Subjects: Smart environment -- south Africa , Application software -- Development , Intelligent buildings
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61477 , vital:70687
- Description: Saving electricity is a trending topic due to the electricity challenges that are being faced globally. Smart environments are environments that are equipped with physical objects, which include computers, sensors, actuators, smartphones, and wearable devices interconnected together through the Internet of Things. The Internet of Things provides a network to achieve communication, and computation abilities to provide individuals with smart services anytime, and anywhere. Rapid developments in information technology have increased the number of smart appliances being used, leading to increased electricity usage. Devices and appliances in Smart Environments continue to consume electricity even when not in use, because of the standby function. The problems arise as the electricity consumption of the standby function accumulates to large amounts. Effective communication through visualisation of the electricity consumption in a Smart Environment provides a viable solution to reducing the consumption of electricity. This research aimed to design and developed a visualisation system that successfully communicates electricity consumption to the user using a variety of visualisation techniques. The Design Science Research Methodology was used to address the research questions and was used to iteratively design and develop an energy usage visualisation system. The visualisation system was created for the Smart Lab at the Nelson Mandela University's Department of Computing Sciences. A usability study was conducted to assess the usability and efficacy of the system. The system was found to be usable and effective in communicating power usage to potential customers, since the participants were able to complete the tasks in a short amount of time. The positive results show that visualisation can aid in communicating electricity usage to customers, resulting in a possible reduction in electricity consumption and improved decision-making. , Thesis (MSc) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2023
- Full Text:
- Date Issued: 2023-04
Investigating Funding Challenges Experienced by SMMEs in Komani, South Africa
- Authors: Doku, Daniel Korku
- Date: 2023-04
- Subjects: Small business -- South Africa , Economic development projects--Finance
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61165 , vital:69790
- Description: All around the world there are small, medium and micro-enterprises (SMMEs) that help by creating jobs and contributing to gross domestic product. However, funding is a major problem that limits the growth and development of SMMEs. Funding challenges have increased, hence the need for research to be conducted in Komani, in South Africa‟s Eastern Cape Province, to see how the challenge can be overcome. This research aims at investigating the funding challenges experienced by SMMEs in Komani. The objectives of the research were to: evaluate the effect of funding challenges on the number of people employed in SMMEs; establish reasons why SMMEs fail to obtain funding from major financial institutions; to examine the avenues available for funding SMMEs; and to recommend to policymakers and SMMEs how to solve the problem of funding. However, previous research in Komani has not managed to investigate this problem with regard to the research process and the method used. This research is based on the positivistic paradigm and used the quantitative method to investigate the funding challenges. The research population was 441 SMMEs; of them 82 SMMEs were sampled using questionnaires. Data collected was analysed using Excel and Stata. Pearson Chi-square test of association from Stata and Excel Analysis ToolPak were used. The study found that most SMMEs use retained earnings and informal funding to finance their operations. It also found that most SMMEs were unaware of government support agencies like SEFA. The research recommends that more must be done to raise awareness on a regular basis to make sure that all SMMEs are aware of the financial support system that the government has for the SMMEs. Financial institutions will need to lower their requirements when SMMEs apply for finance. Finally, SMMEs are supported financially by both the government and the private sector to employ more people. However, the government could also create a guarantee scheme for SMMEs to ensure successful credit applications , Thesis (MA) -- Faculty of business and economic sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Doku, Daniel Korku
- Date: 2023-04
- Subjects: Small business -- South Africa , Economic development projects--Finance
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61165 , vital:69790
- Description: All around the world there are small, medium and micro-enterprises (SMMEs) that help by creating jobs and contributing to gross domestic product. However, funding is a major problem that limits the growth and development of SMMEs. Funding challenges have increased, hence the need for research to be conducted in Komani, in South Africa‟s Eastern Cape Province, to see how the challenge can be overcome. This research aims at investigating the funding challenges experienced by SMMEs in Komani. The objectives of the research were to: evaluate the effect of funding challenges on the number of people employed in SMMEs; establish reasons why SMMEs fail to obtain funding from major financial institutions; to examine the avenues available for funding SMMEs; and to recommend to policymakers and SMMEs how to solve the problem of funding. However, previous research in Komani has not managed to investigate this problem with regard to the research process and the method used. This research is based on the positivistic paradigm and used the quantitative method to investigate the funding challenges. The research population was 441 SMMEs; of them 82 SMMEs were sampled using questionnaires. Data collected was analysed using Excel and Stata. Pearson Chi-square test of association from Stata and Excel Analysis ToolPak were used. The study found that most SMMEs use retained earnings and informal funding to finance their operations. It also found that most SMMEs were unaware of government support agencies like SEFA. The research recommends that more must be done to raise awareness on a regular basis to make sure that all SMMEs are aware of the financial support system that the government has for the SMMEs. Financial institutions will need to lower their requirements when SMMEs apply for finance. Finally, SMMEs are supported financially by both the government and the private sector to employ more people. However, the government could also create a guarantee scheme for SMMEs to ensure successful credit applications , Thesis (MA) -- Faculty of business and economic sciences, 2023
- Full Text:
- Date Issued: 2023-04
Investigating the role of UAVs and convolutional neural networks in the identification of invasive plant species in the Albany Thicket
- Authors: Wesson, Frank Cameron
- Date: 2023-04
- Subjects: Drone aircraft -- Control systems , Drone -- South Africa , Albany Thicket -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61097 , vital:69755
- Description: The study aimed to determine whether plant species could be classified by using high resolution aerial imagery and a convolutional neural network (CNN). The full capabilities of a CNN were examined including testing whether the platform could be used for land cover and the evaluation of land change over time. A drone or unmanned aerial vehicle (UAV) was used to collect the aerial data of the study area, and 45 subplots were used for the image analysis. The CNN was coded and operated in RStudio, and digitised data from the input imagery were used as training and validation data by the programme to learn features. Four classifications were performed using various quantities of input data to access the performance of the neural network. In addition, tests were performed to understand whether the CNN could be used as a land cover and land change detection tool. Accuracy assessments were done on the results to test reliability and accuracy. The best-performing classification achieved an average user and producer accuracy of above 90%, while the overall accuracy was 93%, and the kappa coefficient score was 0.86. The CNN was also able to predict the land coverage area of Opuntia to be within 4% of the ground truthing data area. A change in land cover over time was detected by the programme after the manual clearing of the invasive plant had been undertaken. This research has determined that the use of a CNN in remote sensing is a very powerful tool for supervised image classifications and that it can be used for monitoring land cover by accurately estimating the spatial distribution of plant species and by monitoring the species' growth or decline over time. A CNN could also be used as a tool for landowners to prove that they are making efforts to clear invasive species from their land. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Wesson, Frank Cameron
- Date: 2023-04
- Subjects: Drone aircraft -- Control systems , Drone -- South Africa , Albany Thicket -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61097 , vital:69755
- Description: The study aimed to determine whether plant species could be classified by using high resolution aerial imagery and a convolutional neural network (CNN). The full capabilities of a CNN were examined including testing whether the platform could be used for land cover and the evaluation of land change over time. A drone or unmanned aerial vehicle (UAV) was used to collect the aerial data of the study area, and 45 subplots were used for the image analysis. The CNN was coded and operated in RStudio, and digitised data from the input imagery were used as training and validation data by the programme to learn features. Four classifications were performed using various quantities of input data to access the performance of the neural network. In addition, tests were performed to understand whether the CNN could be used as a land cover and land change detection tool. Accuracy assessments were done on the results to test reliability and accuracy. The best-performing classification achieved an average user and producer accuracy of above 90%, while the overall accuracy was 93%, and the kappa coefficient score was 0.86. The CNN was also able to predict the land coverage area of Opuntia to be within 4% of the ground truthing data area. A change in land cover over time was detected by the programme after the manual clearing of the invasive plant had been undertaken. This research has determined that the use of a CNN in remote sensing is a very powerful tool for supervised image classifications and that it can be used for monitoring land cover by accurately estimating the spatial distribution of plant species and by monitoring the species' growth or decline over time. A CNN could also be used as a tool for landowners to prove that they are making efforts to clear invasive species from their land. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Investigating thermoregulatory responses of rhabdomys pumilio at high wet-bulb temperatures
- Authors: Hartley, Oliver
- Date: 2023-04
- Subjects: Heat stress physiology , Small mammal thermoregulation -- South Africa , Climate change - Wet-bulb temperature
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60873 , vital:68916
- Description: As the Anthropocene continues to be characterised by ever rising temperature highs, increasingly sporadic and extreme climatic events, and their accompanying mass mortality events, climate scientists now warn that the continued climate destabilisation may for the first time in recorded history prevent terrestrial homeothermic endotherms from being able to thermoregulate. Having evolved to maintain body temperatures (Tbs) well above their ambient (Ta) conditions, these endotherms have evolved a suite of adaptations to a colder environment to allow for homeothermic thermoregulation to occur. However, by the same vein, having evolved in a colder climate to stay warm also has led to a reduced capacity to prevent heat stress when temperature conditions are elevated. In absence of behavioural counter measures, the only physiological means available to thermoregulation to prevent such heat stress is that of evaporative water loss (EWL). If still inefficient, the endotherm will risk becoming hyperthermic. Literature has established that excessive heat exposure or reduced evaporative cooling capacities strain or retard thermoregulatory processes. If an endotherm experiences severe heat exposure, the rate at which passive heating is experienced will increase. Should an endotherm be in a humid environment, evaporative cooling efficiency is reduced. As a result, these two abiotic factors are therefore known to contribute towards heat storage, and therefore thermal stress. However, should both factors occur in the same environment, the heat stress effects are compounded, creating an environment dangerous for thermoregulating endotherms. For this reason, authors have emphasised that future wet-bulb (Tw) conditions may pose a penultimate threat to thermoregulating endotherms. Being a measure of coldest temperature attainable as a result of evaporative cooling, Tw has been proposed to represent a lower temperature thermal limit to endothermic thermoregulation. Once reaching a 2°C differential below an endotherms Tb (Tb – Tw = 2˚C), Tw is believed to impede the evaporative cooling process and, consequentially, commit endotherms to becoming hyperthermic. Considering that most mammals defend constant Tbs within the range of predicted Tw maxima increases that future Tw conditions may pose a significant threat to mammalian thermoregulation. However, to date, despite being well supported in the literature, ii empirical investigations into how extreme Tw conditions will affect endothermic thermoregulation are scant. Therefore, understanding of the proposed inhibitory nature of extreme Tw conditions is lacking. Considering that such conditions are to have a profound effect of endothermic survival, this dearth in understanding could prove fatal. As such, this thesis sought to provide evidence on how extreme Tw conditions may affect thermoregulatory processes in homeothermic endotherms. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Hartley, Oliver
- Date: 2023-04
- Subjects: Heat stress physiology , Small mammal thermoregulation -- South Africa , Climate change - Wet-bulb temperature
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60873 , vital:68916
- Description: As the Anthropocene continues to be characterised by ever rising temperature highs, increasingly sporadic and extreme climatic events, and their accompanying mass mortality events, climate scientists now warn that the continued climate destabilisation may for the first time in recorded history prevent terrestrial homeothermic endotherms from being able to thermoregulate. Having evolved to maintain body temperatures (Tbs) well above their ambient (Ta) conditions, these endotherms have evolved a suite of adaptations to a colder environment to allow for homeothermic thermoregulation to occur. However, by the same vein, having evolved in a colder climate to stay warm also has led to a reduced capacity to prevent heat stress when temperature conditions are elevated. In absence of behavioural counter measures, the only physiological means available to thermoregulation to prevent such heat stress is that of evaporative water loss (EWL). If still inefficient, the endotherm will risk becoming hyperthermic. Literature has established that excessive heat exposure or reduced evaporative cooling capacities strain or retard thermoregulatory processes. If an endotherm experiences severe heat exposure, the rate at which passive heating is experienced will increase. Should an endotherm be in a humid environment, evaporative cooling efficiency is reduced. As a result, these two abiotic factors are therefore known to contribute towards heat storage, and therefore thermal stress. However, should both factors occur in the same environment, the heat stress effects are compounded, creating an environment dangerous for thermoregulating endotherms. For this reason, authors have emphasised that future wet-bulb (Tw) conditions may pose a penultimate threat to thermoregulating endotherms. Being a measure of coldest temperature attainable as a result of evaporative cooling, Tw has been proposed to represent a lower temperature thermal limit to endothermic thermoregulation. Once reaching a 2°C differential below an endotherms Tb (Tb – Tw = 2˚C), Tw is believed to impede the evaporative cooling process and, consequentially, commit endotherms to becoming hyperthermic. Considering that most mammals defend constant Tbs within the range of predicted Tw maxima increases that future Tw conditions may pose a significant threat to mammalian thermoregulation. However, to date, despite being well supported in the literature, ii empirical investigations into how extreme Tw conditions will affect endothermic thermoregulation are scant. Therefore, understanding of the proposed inhibitory nature of extreme Tw conditions is lacking. Considering that such conditions are to have a profound effect of endothermic survival, this dearth in understanding could prove fatal. As such, this thesis sought to provide evidence on how extreme Tw conditions may affect thermoregulatory processes in homeothermic endotherms. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2023
- Full Text:
- Date Issued: 2023-04
Isolation, characterization and functionalization of cellulose fibres derived from the waste pineapple leaf fibres by hydrolysis to produce cellulose acetate
- Authors: Seyisi, Thulethu
- Date: 2023-04
- Subjects: Nonwoven fabrics -- Technological innovations , Pineapple fiber -- South Africa , Fibrous composites
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61248 , vital:69844
- Description: This thesis forms part of the Nelson Mandela University biomass and nanotechnology project, which aims at using agricultural waste for many applications, including biomedical applications, water treatment, and agricultural films. Pineapple leaf fiber (PALF) is one of the natural fibers with the highest cellulose content (about 80%), and they produce about 2.5–3.3% of the weight of green leaves. However, the other parts of the pineapple fruit, such as the leaves and crown, are still treated as waste due to a lack of understanding of the benefits and risks of these parts of the pineapple fruit. The transformation of PALF as a renewable and abundantly available natural residue into cellulose fibers (CFs) will reduce the waste accumulated in the atmosphere, and it will add value to the cultivation of pineapple. In the biomedical industry, CF is very promising in terms of drug delivery. Cellulose acetate is a remarkable biomaterial extensively used in biomedical applications due to its properties such as being non-toxic, non-irritant, biodegradable, heat resistant, and less hygroscopic. In this research, the isolation, functionalization, and characterization of cellulose from PALFs were conducted. The PALFs were dried and ground into small particles before being alkali treated with sodium hydroxide to remove the non-cellulosic components. Moreover, the remaining lignin in the residue was removed using sodium chlorite and acetic acid; this process is known as the bleaching process. The bleaching process resulted in white CFs, which was an indication of the successful removal of the non-cellulosic material. The obtained CFs were further functionalized using acetic acid, acetic anhydride, and sulfuric acid, and this reaction is known as the acetylation reaction. Subsequently, both treated, untreated, and functionalized CFs were characterised using the following instruments: FTIR, SEM, SPM, TGA, XRD, and XPS. In the FTIR data of raw PALFs, the following functional groups were more pronounced: C-O, C=C-O, and C=O, whereas peak C-O-C disappeared and peak CH2, C-O, were less pronounced. These FTIR results confirmed the successful removal of non-cellulosic components. The SEM and SPM images visually suggested the partial removal of hemicellulose and lignin from the raw PALFs after the chemical treatment, which are the cementing materials around the fiber bundles. The TGA studies revealed good thermal stability for the isolated CFs from PALFs. The XRD diffractograms of the PALFs showed a cellulose I crystal pattern where the peaks were located at angular positions (2θ) of around 18°, 26°, and 41°. Lastly, after the functionalization of CFs, the cellulose structure remained intact (not damaged); instead, the newly ix introduced functional groups (the acetyl group) were attached at the ends of the cellulose structure. These results are therefore confirmation of the successful removal of non-cellulose material from the PALFs after the chemical treatment. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Science and Management, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Seyisi, Thulethu
- Date: 2023-04
- Subjects: Nonwoven fabrics -- Technological innovations , Pineapple fiber -- South Africa , Fibrous composites
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61248 , vital:69844
- Description: This thesis forms part of the Nelson Mandela University biomass and nanotechnology project, which aims at using agricultural waste for many applications, including biomedical applications, water treatment, and agricultural films. Pineapple leaf fiber (PALF) is one of the natural fibers with the highest cellulose content (about 80%), and they produce about 2.5–3.3% of the weight of green leaves. However, the other parts of the pineapple fruit, such as the leaves and crown, are still treated as waste due to a lack of understanding of the benefits and risks of these parts of the pineapple fruit. The transformation of PALF as a renewable and abundantly available natural residue into cellulose fibers (CFs) will reduce the waste accumulated in the atmosphere, and it will add value to the cultivation of pineapple. In the biomedical industry, CF is very promising in terms of drug delivery. Cellulose acetate is a remarkable biomaterial extensively used in biomedical applications due to its properties such as being non-toxic, non-irritant, biodegradable, heat resistant, and less hygroscopic. In this research, the isolation, functionalization, and characterization of cellulose from PALFs were conducted. The PALFs were dried and ground into small particles before being alkali treated with sodium hydroxide to remove the non-cellulosic components. Moreover, the remaining lignin in the residue was removed using sodium chlorite and acetic acid; this process is known as the bleaching process. The bleaching process resulted in white CFs, which was an indication of the successful removal of the non-cellulosic material. The obtained CFs were further functionalized using acetic acid, acetic anhydride, and sulfuric acid, and this reaction is known as the acetylation reaction. Subsequently, both treated, untreated, and functionalized CFs were characterised using the following instruments: FTIR, SEM, SPM, TGA, XRD, and XPS. In the FTIR data of raw PALFs, the following functional groups were more pronounced: C-O, C=C-O, and C=O, whereas peak C-O-C disappeared and peak CH2, C-O, were less pronounced. These FTIR results confirmed the successful removal of non-cellulosic components. The SEM and SPM images visually suggested the partial removal of hemicellulose and lignin from the raw PALFs after the chemical treatment, which are the cementing materials around the fiber bundles. The TGA studies revealed good thermal stability for the isolated CFs from PALFs. The XRD diffractograms of the PALFs showed a cellulose I crystal pattern where the peaks were located at angular positions (2θ) of around 18°, 26°, and 41°. Lastly, after the functionalization of CFs, the cellulose structure remained intact (not damaged); instead, the newly ix introduced functional groups (the acetyl group) were attached at the ends of the cellulose structure. These results are therefore confirmation of the successful removal of non-cellulose material from the PALFs after the chemical treatment. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Science and Management, 2023
- Full Text:
- Date Issued: 2023-04
Justification of chest mobile radiographic examinations: : experiences of radiographers in a private radiology practice in the Nelson Mandela Bay Health District
- Authors: Barnardo, Linda-Ann
- Date: 2023-04
- Subjects: Radiographer , Radiation protection , Mobile radiographic
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/66367 , vital:74719
- Description: The principle of justification in radiographic imaging aims to best answer a medical question while evaluating the expected benefits of radiation exposure against the probable detriment to the individual patient. The implementation of justification in radiography requires the assessment and evaluation of chest mobile radiographic requests against justification criteria, considering the underpinning principles of radiation: justification, optimisation and authorisation. Diagnostic chest mobile radiographic imaging has been part of healthcare for the last century. Medico-legal requirements by the professional registration body, the Health Professions Council of South Africa (HPCSA), identify justification as an advocated and obligatory practice among radiographers. Yet, justification remains an inconsistent practice among South African radiographers due to several challenges in the healthcare setting. The aim of this study was to investigate the experiences of radiographers regarding the justification of chest mobile radiographic examination requests in a private radiology practice in the Nelson Mandela Bay Health District (NMBHD). A qualitative, exploratory-descriptive and contextual research design was used to gain in-depth data of the experiences of South African radiographers regarding the justification of chest mobile radiographic requests. Data were gathered from the participants using unstructured, open-ended, in-depth individual interviews. Data were transcribed verbatim and coded using Tesch’s eight steps of data coding and analysis process. Two principal themes were constructed during data analysis. Theme one identified the barriers and associated affective responses related to the appropriate implementation of justification of mobile chest radiographic examinations. Theme two recognised recommendations to enhance the implementation of justification by radiographers for mobile chest radiographic examinations. The research study was governed by methods to ensure trustworthiness and ethical practices. Based on the findings of this study, four recommendations were developed to assist radiographers to establish whether a request for mobile radiographic chest examinations is appropriately justified, which can contribute to establishing a radiation safety culture in the research setting pertaining to chest mobile radiography. , Thesis (MSc) -- Faculty of Health Science, School of Clinical Care Sciences, 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Barnardo, Linda-Ann
- Date: 2023-04
- Subjects: Radiographer , Radiation protection , Mobile radiographic
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/66367 , vital:74719
- Description: The principle of justification in radiographic imaging aims to best answer a medical question while evaluating the expected benefits of radiation exposure against the probable detriment to the individual patient. The implementation of justification in radiography requires the assessment and evaluation of chest mobile radiographic requests against justification criteria, considering the underpinning principles of radiation: justification, optimisation and authorisation. Diagnostic chest mobile radiographic imaging has been part of healthcare for the last century. Medico-legal requirements by the professional registration body, the Health Professions Council of South Africa (HPCSA), identify justification as an advocated and obligatory practice among radiographers. Yet, justification remains an inconsistent practice among South African radiographers due to several challenges in the healthcare setting. The aim of this study was to investigate the experiences of radiographers regarding the justification of chest mobile radiographic examination requests in a private radiology practice in the Nelson Mandela Bay Health District (NMBHD). A qualitative, exploratory-descriptive and contextual research design was used to gain in-depth data of the experiences of South African radiographers regarding the justification of chest mobile radiographic requests. Data were gathered from the participants using unstructured, open-ended, in-depth individual interviews. Data were transcribed verbatim and coded using Tesch’s eight steps of data coding and analysis process. Two principal themes were constructed during data analysis. Theme one identified the barriers and associated affective responses related to the appropriate implementation of justification of mobile chest radiographic examinations. Theme two recognised recommendations to enhance the implementation of justification by radiographers for mobile chest radiographic examinations. The research study was governed by methods to ensure trustworthiness and ethical practices. Based on the findings of this study, four recommendations were developed to assist radiographers to establish whether a request for mobile radiographic chest examinations is appropriately justified, which can contribute to establishing a radiation safety culture in the research setting pertaining to chest mobile radiography. , Thesis (MSc) -- Faculty of Health Science, School of Clinical Care Sciences, 2023
- Full Text:
- Date Issued: 2023-04