Assessing service delivery protests in the Nelson Mandela Bay Municipality: the case of Walmer Township
- Authors: Mdanyana, Esethu
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54492 , vital:46609
- Description: In many South Africa’s areas, citizen’s frustration with poor or slow service delivery has resulted in a surge of service delivery protests. Some of these service delivery protests are violent in nature, resulting in the damage of public and private property. Therefore, it is imperative to scrutinize service delivery protests. The South African constitution states that municipalities have the responsibility to make sure that all citizens are provided with services to satisfy their basic needs. These services include water supply, sewage collection and disposal electricity, gas supply health services, roads, storm water drainage, street lighting, municipal parks and recreation. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text: false
- Date Issued: 2021-12
- Authors: Mdanyana, Esethu
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54492 , vital:46609
- Description: In many South Africa’s areas, citizen’s frustration with poor or slow service delivery has resulted in a surge of service delivery protests. Some of these service delivery protests are violent in nature, resulting in the damage of public and private property. Therefore, it is imperative to scrutinize service delivery protests. The South African constitution states that municipalities have the responsibility to make sure that all citizens are provided with services to satisfy their basic needs. These services include water supply, sewage collection and disposal electricity, gas supply health services, roads, storm water drainage, street lighting, municipal parks and recreation. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text: false
- Date Issued: 2021-12
Assessing the implementation of environmental education school policy in Buffalo City Metro Education District South Africa
- Authors: Damoah, Benjamin
- Date: 2021-12
- Subjects: Environmental education , Environmental policy -- South Africa , Education and state -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21602 , vital:51703
- Description: Environmental Education (EE) is essential for addressing environmental challenges.The advantages of EE are undeniable; it might be used to address specific environmental concerns and their implications, as well as to modify behaviours that lead to environmental catastrophes.EE strengthens people's resilience to climaterelated hazards. Global environmental issues have heightened interest in educational policy outcomes and their implications for economic growth and social citizenship. It is worth noting that an effective EE policy has a significant influence on the development of learners' environmental literacy. This study assessed the implementation of environmental education school policy in the Buffalo City Metro Education District, South Africa. This study adopted the pragmatism paradigm of Mixed Method Research(MMR). Concurrent triangulation, which is a design that employs a single data collection technique in which quantitative and qualitative data gathering and analysis are carried out independently yet concurrently, was used for this study. The target population of this study involved 60,412 teachers, 1,770,289 learners in 5205 public schools, and 1 Pro-EE civil society organisation in the Eastern Cape province. This was narrowed down to over 268 public and independent schools, teachers, and principals within the enclave of the Buffalo Metropolitan education district. The study adopted stratified purposeful and simple random probability sampling. In this technique, the sampling frame of the study was divided into strata or groups (principals, teachers, learners, and CSOs) and a sample was purposefully selected from each stratum (Migiro & Magangi, 2011). The stratified purposeful random sampling techniques draw data from 10 principals, 175 teachers, 1500 learners, and 1 CSO. Structured questionnaire; Implementation of EE Policy Questionnaire (IEEPQ) whose reliability co-efficient value using Cronbach Alpha was 0.74, semi-structured interview and documents were the instruments used to collect data for this study. The data were analysed using descriptive statistics of percentage, mean, and standard deviation for the quantitative data while the thematic approach of sorting, coding, transcribing, and categorization was used for the qualitative data. The study revealed the following. When asked whether teachers had studied environmental education in tertiary institutions as part of their professional training, the majority of the teachers'respondents, 108, representing 61.7percent, disagreed with this view. On the flip side, a handful of teachers 67, (38.3percent) agreed with the view of having had some sort of EE knowledge during their professional training as teachers. With regards to the view that learners learn environmental issues through other subjects, most of the learner respondents, 1316 representing 87.7percent, agreed with this view. On the contrary, a minority of the respondents 184 (12,3percent) had a dissenting opinion. This indicates that most learners in school learn about environmental concerns through other traditional subjects. The study established that EE content is manifest in teachers' and learners' textbooks, teaching methods, and co-curricular activities. However, the study identified lapses in how teachers and learners integrate EE into their day-to-day practices. Therefore, the implementation of the EE policy seems to be an exercise in futility. The absence of a policy guideline document has made teachers and school administrators incapacitated in the implementation of EE school policy. , Thesis (PhD) -- Faculty of Education, 2022
- Full Text:
- Date Issued: 2021-12
- Authors: Damoah, Benjamin
- Date: 2021-12
- Subjects: Environmental education , Environmental policy -- South Africa , Education and state -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/21602 , vital:51703
- Description: Environmental Education (EE) is essential for addressing environmental challenges.The advantages of EE are undeniable; it might be used to address specific environmental concerns and their implications, as well as to modify behaviours that lead to environmental catastrophes.EE strengthens people's resilience to climaterelated hazards. Global environmental issues have heightened interest in educational policy outcomes and their implications for economic growth and social citizenship. It is worth noting that an effective EE policy has a significant influence on the development of learners' environmental literacy. This study assessed the implementation of environmental education school policy in the Buffalo City Metro Education District, South Africa. This study adopted the pragmatism paradigm of Mixed Method Research(MMR). Concurrent triangulation, which is a design that employs a single data collection technique in which quantitative and qualitative data gathering and analysis are carried out independently yet concurrently, was used for this study. The target population of this study involved 60,412 teachers, 1,770,289 learners in 5205 public schools, and 1 Pro-EE civil society organisation in the Eastern Cape province. This was narrowed down to over 268 public and independent schools, teachers, and principals within the enclave of the Buffalo Metropolitan education district. The study adopted stratified purposeful and simple random probability sampling. In this technique, the sampling frame of the study was divided into strata or groups (principals, teachers, learners, and CSOs) and a sample was purposefully selected from each stratum (Migiro & Magangi, 2011). The stratified purposeful random sampling techniques draw data from 10 principals, 175 teachers, 1500 learners, and 1 CSO. Structured questionnaire; Implementation of EE Policy Questionnaire (IEEPQ) whose reliability co-efficient value using Cronbach Alpha was 0.74, semi-structured interview and documents were the instruments used to collect data for this study. The data were analysed using descriptive statistics of percentage, mean, and standard deviation for the quantitative data while the thematic approach of sorting, coding, transcribing, and categorization was used for the qualitative data. The study revealed the following. When asked whether teachers had studied environmental education in tertiary institutions as part of their professional training, the majority of the teachers'respondents, 108, representing 61.7percent, disagreed with this view. On the flip side, a handful of teachers 67, (38.3percent) agreed with the view of having had some sort of EE knowledge during their professional training as teachers. With regards to the view that learners learn environmental issues through other subjects, most of the learner respondents, 1316 representing 87.7percent, agreed with this view. On the contrary, a minority of the respondents 184 (12,3percent) had a dissenting opinion. This indicates that most learners in school learn about environmental concerns through other traditional subjects. The study established that EE content is manifest in teachers' and learners' textbooks, teaching methods, and co-curricular activities. However, the study identified lapses in how teachers and learners integrate EE into their day-to-day practices. Therefore, the implementation of the EE policy seems to be an exercise in futility. The absence of a policy guideline document has made teachers and school administrators incapacitated in the implementation of EE school policy. , Thesis (PhD) -- Faculty of Education, 2022
- Full Text:
- Date Issued: 2021-12
Authentic leadership, psychological capital, work engagement and safety behaviour in a construction environment
- Authors: Turner, Gillian
- Date: 2021-12
- Subjects: Construction industry -- South Africa -- Safety measures
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54388 , vital:46487
- Description: Research purpose: The purpose of the study was (1) to investigate the relationship between authentic leadership, psychological capital (PsyCap), work engagement, and employees’ safety behaviour, and (2) to develop and test a theoretical model comprising of all four constructs as informed by the literature review and data collected. In essence, the goal is to develop recommendations to support and contribute to the overall effectiveness of the construction industry based on the findings of the study. The study will assist South African businesses in the construction domain to manage their demanding work environment and minimise the number of occupational safety violations and injuries. Research motivation: Studies that explore safety from more recently acknowledged leadership theories are in short supply. This study is addressed through the lens of Positive Organisational Behaviour (POB) to situate authentic leadership and PsyCap as measurable constructs that can be developed to have a positive impact on work engagement and safety behaviour. This approach is especially significant in the South African construction environment because of the growing emphasis on the health and safety concerns. In essence, this study links a contemporary leadership theory, psychological constructs, and associated outcomes distinctively to a given industry within the South African context, that is work engagement and safety behaviour. Research design, approach, and method: This study follows a cross-sectional approach to investigate the relationship between authentic leadership, PsyCap, work engagement, and safety behaviour in a construction environment. Convenience sampling was employed to recruit full-time employed workers across hierarchical levels, ranging from blue-collar workers (installation technicians, paving installers, and maintenance technicians) to white-collar workers (supervisors, line managers, senior managers, and other administrative employees), working in the South African construction industry. Both paper-and-pencil and online questionnaires were utilised to collect data for the study. Two hundred paper-and-pencil questionnaires were distributed, and 89 online questionnaires were accessed by potential respondents, with a total of 198 completed questionnaires. A response rate of 65.41% was realised. Quantitative techniques were used to analyse the data: Reliability assessment, Confirmatory factor analysis (CFA), correlation analysis, independent t-test, analysis of variance (ANOVA), and structural equation modelling (SEM). Main findings: All hypotheses were supported. The results indicate that there is an association between the constructs in the study. Specifically, the relationship between authentic leadership and safety behaviour is mediated by PsyCap and work engagement. The research provides valuable input as significant differences were noted across all constructs and demographic variables, except age. Limitations: The results should be interpreted, bearing in mind that there is limited literature available on the relationship between the constructs in the study when applied to the South African context. Furthermore, the limitations primarily revolved around the research design. Specifically, the questionnaire was completed at one point in time and the use of convenience sampling may be associated with possible sampling bias. In response to the COVID-19 pandemic and lockdown which limited group gatherings and contact, a change in the data collection method was necessary. That is, the data collection method changed from a paper-and-pencil version to the online administration of the questionnaire. This resulted in a six-month delay in the completion of data collection. Finally, the wording of certain items may have contributed to central tendency in responses. Future research: It is suggested that future studies should investigate the relationship between the constructs using larger samples, different occupations, alternative South African industries, and explore the long-term effects of these constructs in the South African workplace by adopting a longitudinal research design. This can also be considered in relation to possible interventions to improve leadership authenticity and increase PsyCap and work engagement, with the intention of mitigating adverse safety events in the construction industry. In addition, future studies should also consider how this relationship can be influenced by different ethnic and cultural groups to gain a better understanding of how differences in ethnicity manifests in the constructs. Researchers should also explore the constructs as a group-level phenomenon and consider explanations from an alternative theoretical framework. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Turner, Gillian
- Date: 2021-12
- Subjects: Construction industry -- South Africa -- Safety measures
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54388 , vital:46487
- Description: Research purpose: The purpose of the study was (1) to investigate the relationship between authentic leadership, psychological capital (PsyCap), work engagement, and employees’ safety behaviour, and (2) to develop and test a theoretical model comprising of all four constructs as informed by the literature review and data collected. In essence, the goal is to develop recommendations to support and contribute to the overall effectiveness of the construction industry based on the findings of the study. The study will assist South African businesses in the construction domain to manage their demanding work environment and minimise the number of occupational safety violations and injuries. Research motivation: Studies that explore safety from more recently acknowledged leadership theories are in short supply. This study is addressed through the lens of Positive Organisational Behaviour (POB) to situate authentic leadership and PsyCap as measurable constructs that can be developed to have a positive impact on work engagement and safety behaviour. This approach is especially significant in the South African construction environment because of the growing emphasis on the health and safety concerns. In essence, this study links a contemporary leadership theory, psychological constructs, and associated outcomes distinctively to a given industry within the South African context, that is work engagement and safety behaviour. Research design, approach, and method: This study follows a cross-sectional approach to investigate the relationship between authentic leadership, PsyCap, work engagement, and safety behaviour in a construction environment. Convenience sampling was employed to recruit full-time employed workers across hierarchical levels, ranging from blue-collar workers (installation technicians, paving installers, and maintenance technicians) to white-collar workers (supervisors, line managers, senior managers, and other administrative employees), working in the South African construction industry. Both paper-and-pencil and online questionnaires were utilised to collect data for the study. Two hundred paper-and-pencil questionnaires were distributed, and 89 online questionnaires were accessed by potential respondents, with a total of 198 completed questionnaires. A response rate of 65.41% was realised. Quantitative techniques were used to analyse the data: Reliability assessment, Confirmatory factor analysis (CFA), correlation analysis, independent t-test, analysis of variance (ANOVA), and structural equation modelling (SEM). Main findings: All hypotheses were supported. The results indicate that there is an association between the constructs in the study. Specifically, the relationship between authentic leadership and safety behaviour is mediated by PsyCap and work engagement. The research provides valuable input as significant differences were noted across all constructs and demographic variables, except age. Limitations: The results should be interpreted, bearing in mind that there is limited literature available on the relationship between the constructs in the study when applied to the South African context. Furthermore, the limitations primarily revolved around the research design. Specifically, the questionnaire was completed at one point in time and the use of convenience sampling may be associated with possible sampling bias. In response to the COVID-19 pandemic and lockdown which limited group gatherings and contact, a change in the data collection method was necessary. That is, the data collection method changed from a paper-and-pencil version to the online administration of the questionnaire. This resulted in a six-month delay in the completion of data collection. Finally, the wording of certain items may have contributed to central tendency in responses. Future research: It is suggested that future studies should investigate the relationship between the constructs using larger samples, different occupations, alternative South African industries, and explore the long-term effects of these constructs in the South African workplace by adopting a longitudinal research design. This can also be considered in relation to possible interventions to improve leadership authenticity and increase PsyCap and work engagement, with the intention of mitigating adverse safety events in the construction industry. In addition, future studies should also consider how this relationship can be influenced by different ethnic and cultural groups to gain a better understanding of how differences in ethnicity manifests in the constructs. Researchers should also explore the constructs as a group-level phenomenon and consider explanations from an alternative theoretical framework. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Barriers of entry for black people from owning game reserves in the Eastern Cape
- Authors: Mazaleni, Zintle
- Date: 2021-12
- Subjects: Game reserves -- South Africa -- Eastern Cape -- Management , Game reserves -- Black people -- South Africa -- Eastern Cape -- Management
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54903 , vital:48469
- Description: The conservation industry was closed in the previous apartheid time from the black native people and only opened for the white people alone (Spierenburg & Brooks, 2014). According to Mokotjomela, Nombewu, and Peinke, 2015, the game transformation industry is in need of being transformed to more young black people; they noted the challenges that are faced by the young black people in being able to own nature reserves. These include the fact that they are landless. Secondly, the land transformation that is done through the Department of Rural Development, Land and Agrarian Reform (DRDLAR) is not given back to the rightful owners with the title deeds which is also a challenge as one cannot develop land when there is no certainty that it is theirs (Turner, 2004). Tourism destinations which include the game reserves attract tourists because of the positive economic impacts such as labour-intensive jobs, foreign exchange, and foreign direct investments that come with tourists and boost small businesses. According to Sifilo and Henama (2017), tourism has been an economic messiah of South Africa and the decline of mining jobs has been mitigated by the growth of jobs in the tourism industry. The Eastern Cape's economy is still characterised by disparities in employment rates, income, service levels, and productivity. Economic growth rates have been modest, in line with the rest of the country. Low growth and high unemployment have created considerable issues for the province, with a notably increased demand for social services. According to the most recent economic data, the province's economy is declining (or at the very least is stagnant): The average yearly change in gross domestic product (GDP) per region (Eastern Cape) was 1% in the preceding five years, but only 0.6 percent in the last year The selection of the qualitative research approach and in particular the use of open-ended questionnaires is because it is the only platform that will allow participants to voice their opinions fully without limits and allow the study not to be limited with the information given by the participants. The first section of the questionnaire aimed at obtaining profile data on the respondents. These include age, gender, ethnicity, home language, educational level and time working in conservation and the tourism sector. Questions 8 – 17 focused on respondents stating no, yes, or maybe to the posed questions and elaborating on their experience and knowledge of the wildlife industry, while questions 18 – 24 mainly focused on gaining and listing opinions of respondents on solution to allow entry for black people into the wildlife industry, as well as giving advice on how government and the private sector can assist in reaching the desired goal. Strongly indicated by the empirical results is the gap between the previously disadvantaged group and the white minority group in the province of the Eastern Cape in the wildlife conservation industry. Shown by the results is the position of the black people in the industry as just servants or employees and not owners or equal shareholders and the lack of women leadership in the industry, as well as young people involvement in the decisions and operations of the industry. The list of barriers had one common barrier identified by almost all respondents as noted by the researcher: the issue of land unavailability for the black people in the province. Communal land does not have title deeds as the land is in the hands of governmental departments and traditional authorities. Conditions stipulated on the game transformation policy of the Eastern Cape state that an individual must be in possession of a title deed to the land. This is but a dream to the black people of the Eastern Cape, especially a title deed to a land big enough to be converted into a game reserve. The empirical results strongly indicate the land ownership as the number one barrier for black people from owning game reserves. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mazaleni, Zintle
- Date: 2021-12
- Subjects: Game reserves -- South Africa -- Eastern Cape -- Management , Game reserves -- Black people -- South Africa -- Eastern Cape -- Management
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54903 , vital:48469
- Description: The conservation industry was closed in the previous apartheid time from the black native people and only opened for the white people alone (Spierenburg & Brooks, 2014). According to Mokotjomela, Nombewu, and Peinke, 2015, the game transformation industry is in need of being transformed to more young black people; they noted the challenges that are faced by the young black people in being able to own nature reserves. These include the fact that they are landless. Secondly, the land transformation that is done through the Department of Rural Development, Land and Agrarian Reform (DRDLAR) is not given back to the rightful owners with the title deeds which is also a challenge as one cannot develop land when there is no certainty that it is theirs (Turner, 2004). Tourism destinations which include the game reserves attract tourists because of the positive economic impacts such as labour-intensive jobs, foreign exchange, and foreign direct investments that come with tourists and boost small businesses. According to Sifilo and Henama (2017), tourism has been an economic messiah of South Africa and the decline of mining jobs has been mitigated by the growth of jobs in the tourism industry. The Eastern Cape's economy is still characterised by disparities in employment rates, income, service levels, and productivity. Economic growth rates have been modest, in line with the rest of the country. Low growth and high unemployment have created considerable issues for the province, with a notably increased demand for social services. According to the most recent economic data, the province's economy is declining (or at the very least is stagnant): The average yearly change in gross domestic product (GDP) per region (Eastern Cape) was 1% in the preceding five years, but only 0.6 percent in the last year The selection of the qualitative research approach and in particular the use of open-ended questionnaires is because it is the only platform that will allow participants to voice their opinions fully without limits and allow the study not to be limited with the information given by the participants. The first section of the questionnaire aimed at obtaining profile data on the respondents. These include age, gender, ethnicity, home language, educational level and time working in conservation and the tourism sector. Questions 8 – 17 focused on respondents stating no, yes, or maybe to the posed questions and elaborating on their experience and knowledge of the wildlife industry, while questions 18 – 24 mainly focused on gaining and listing opinions of respondents on solution to allow entry for black people into the wildlife industry, as well as giving advice on how government and the private sector can assist in reaching the desired goal. Strongly indicated by the empirical results is the gap between the previously disadvantaged group and the white minority group in the province of the Eastern Cape in the wildlife conservation industry. Shown by the results is the position of the black people in the industry as just servants or employees and not owners or equal shareholders and the lack of women leadership in the industry, as well as young people involvement in the decisions and operations of the industry. The list of barriers had one common barrier identified by almost all respondents as noted by the researcher: the issue of land unavailability for the black people in the province. Communal land does not have title deeds as the land is in the hands of governmental departments and traditional authorities. Conditions stipulated on the game transformation policy of the Eastern Cape state that an individual must be in possession of a title deed to the land. This is but a dream to the black people of the Eastern Cape, especially a title deed to a land big enough to be converted into a game reserve. The empirical results strongly indicate the land ownership as the number one barrier for black people from owning game reserves. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Bayesian spatio-temporal zero-inflated mixed models for overdispersion on chronic disease mapping
- Osuji, Georgeleen O https://orcid.org/0000-0002-8408-3928
- Authors: Osuji, Georgeleen O https://orcid.org/0000-0002-8408-3928
- Date: 2021-12
- Subjects: Medical mapping , Bayesian statistical decision theory
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/23644 , vital:58230
- Description: Background: Life expectancy in most developing countries has remarkably increased and decreased in mortality, but under 5 years old mortality has increased due to HIV and Tuberculosis incidence. Many factors have been established to influence the mortality rate among HIV patients and understanding the factors contribution to the risk of under 5-year-old mortality is important for designing appropriate health interventions. Excess zeros usually occur in such HIV mortality count data. Mixed models consisting of count part and zero part are often used to describe the observed excess zero in the data. Poisson models are popular modeling inference, but Negative-Binomial models are more flexible in analyzing count data and dealing with overdispersion. Method: This research proposed to develop two-part hurdle models in analyzing areal zero count data. A spatial Bayesian lognormal-logit hurdle model (BLLHM) with random effects characterizes and cross-spatial dependencies were introduced. The parameter inferences and predictions were evaluated using the Markov Chain Monte Carlo algorithm. The model proposed was applied to HIV-positive under 5-year-old mortality collected from the Eastern Cape Department of Health. Results: Bayesian lognormal-logit hurdle model is selected as the best model fit. It is observed that the total number of HIV patients not on ART-HIVnotTB (0.000612, p <0.000) was positively and statistically significantly associated with the HIV-positive mortality of under 5 years patients. Both CD4 counts were done on newly diagnosed HIV rate (CD4count) and HIV-positive new patients screened for TB rate (HIVTBrate) were negatively and statistically significantly associated with the HIV-positive mortality of under 5 years patients (-0.6294, p = 0.000 and -0.00056, p = 0.0052). However, the covariate HIV positive Tuberculosis Preventive therapy (TPT) uptake rate (HIVandTB) was not statistically significantly associated with the HIV-positive mortality of under 5 years patients (-0.00155, p = 0.5392). Conclusion: The model is flexible to deal with zero-inflated and over-dispersed count data. There is a need to consider the risk of cause-specific under-5-year-old mortality in terms of spatial effects. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Osuji, Georgeleen O https://orcid.org/0000-0002-8408-3928
- Date: 2021-12
- Subjects: Medical mapping , Bayesian statistical decision theory
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/23644 , vital:58230
- Description: Background: Life expectancy in most developing countries has remarkably increased and decreased in mortality, but under 5 years old mortality has increased due to HIV and Tuberculosis incidence. Many factors have been established to influence the mortality rate among HIV patients and understanding the factors contribution to the risk of under 5-year-old mortality is important for designing appropriate health interventions. Excess zeros usually occur in such HIV mortality count data. Mixed models consisting of count part and zero part are often used to describe the observed excess zero in the data. Poisson models are popular modeling inference, but Negative-Binomial models are more flexible in analyzing count data and dealing with overdispersion. Method: This research proposed to develop two-part hurdle models in analyzing areal zero count data. A spatial Bayesian lognormal-logit hurdle model (BLLHM) with random effects characterizes and cross-spatial dependencies were introduced. The parameter inferences and predictions were evaluated using the Markov Chain Monte Carlo algorithm. The model proposed was applied to HIV-positive under 5-year-old mortality collected from the Eastern Cape Department of Health. Results: Bayesian lognormal-logit hurdle model is selected as the best model fit. It is observed that the total number of HIV patients not on ART-HIVnotTB (0.000612, p <0.000) was positively and statistically significantly associated with the HIV-positive mortality of under 5 years patients. Both CD4 counts were done on newly diagnosed HIV rate (CD4count) and HIV-positive new patients screened for TB rate (HIVTBrate) were negatively and statistically significantly associated with the HIV-positive mortality of under 5 years patients (-0.6294, p = 0.000 and -0.00056, p = 0.0052). However, the covariate HIV positive Tuberculosis Preventive therapy (TPT) uptake rate (HIVandTB) was not statistically significantly associated with the HIV-positive mortality of under 5 years patients (-0.00155, p = 0.5392). Conclusion: The model is flexible to deal with zero-inflated and over-dispersed count data. There is a need to consider the risk of cause-specific under-5-year-old mortality in terms of spatial effects. , Thesis (PhD) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-12
Beneficiation of pyrolysis-derived waste tyre char by blending with torrefied wood and microalgae to produce solid fuel
- Authors: Dube, Cleopatra Thulani
- Date: 2021-12
- Subjects: Pyrolysis , Solid fuel reactors
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/58439 , vital:59241
- Description: he thermal decomposition of waste tyres via pyrolysis is considered to be amongst the most promising methods of recycling tyres due to its minimal environmental impact (in terms of reduction in pollution). During pyrolysis, tyres are thermally degraded in an inert environment to produce gas, oil and char. The gas and oil have promising commercialization prospects while the char remains a pollutant despite the strides made in a lot of research to upgrade the char to carbon black, activated carbon and even for reuse as a filler in tyre manufacture. For pyrolysis to be profitable, or worthy of investments, all three of its products (oil, char and gas) need to be valorised. Pyrolysis-derived tyre chars (PT-char) have an energy value equivalent to high rank coals, however, the use of PT char as a solid fuel is uncommon due to the high contents of sulphur and mineral matter as well as low volatile matter content of the PT-char. As such, the combustion of PT-char is characterised by high ignition temperature, low thermal reactivity, and no flame formation due to the low amounts of volatile matter. On the other hand, biomass are clean, renewable feedstock, having low sulphur and mineral matter contents, as well as high thermal reactivity. The blending of PT-char with biomass could potentially improve the combustion properties of PT-char and minimise the release of toxic emissions from the char, and thus, could make PT-char suitable for use as a fuel source. In this study, PT-char was blended with torrefied wood and microalgae biomass to demonstrate the suitability of using PT-char-biomass-fuel blend as an energy feedstock. To this effect, a mixture design of experiments was used to formulate the PT-char biomass blends and regression analysis was employed to select an optimum blend formulation for the combustion and mechanical properties of the blends. Proximate analysis results showed a non-linear increase in the volatile matter and a non-linear decrease in the fixed carbon and ash yield as the biomass ratio increased. The calorific value also increased on an additive basis with increasing biomass proportion. The elemental analysis results showed a decrease in the calcium, zinc and bromine contents and an increase in the potassium and iron contents increased with increasing biomass proportion. Likewise, the sulphur content decreased while the oxygen, hydrogen and nitrogen contents increased with increasing biomass ratio. vi Thus, the fuel properties of the blends improved with increasing biomass ratio and without compromising the calorific value of the PT-char. Moreover, the TG-MS analysis showed that the PT-char and the respective blends did not show any release SO2 up to 650°C. Thus, making the fuel suitable for use in low temperature applications such as household and certain boilers. The results of the regression analysis showed that the blend formulation with the highest proportions of biomass, thus C55-T30-M15, is the optimum blend to produce a solid fuel with a low initial decomposition (214°C) and char ignition temperatures (532°C) as well as maximum burn-out temperature (640°C). In essence, the high thermal reactivity of PT-char is improved when both biomasses are loaded at maximum ratios as per the experimental design. The results of the MS showed a decrease in CO2 and NO2 emissions with increasing biomass proportion. The optimum blend (C55-T30-M15) was found to have a comparably higher gross calorific value (26 MJ/kg), lower sulphur content (1.1 wt.%), low ash yield (11wt.%) and lower concentration of minerals (i.e. zinc) than raw PT-char. In addition, the volatile matter content of the blend (20 wt.%) was found to be higher than that of PT-char and the ignition temperature of the optimum fuel blend was relatively lower and its burnout temperature higher than that of PT char. The MS results revealed that the CO2 and NO2 emissions were higher in the optimum blend than the PT-char. The mechanical properties of the pellets; impact resistance and compressive strength increased with increasing biomass blending ratio and even more so with increasing microalgae ratio. The C55-T30-M15 and C75-T10-M15 were selected as optimum blends using regression analysis and both blends exceeded the benchmark for mechanical properties except for water resistance. The blending did not improve the water resistance and all the blends did not meet the minimum threshold for water resistance. Overall, the blending of PT-char with torrefied wood and microalgae biomass has shown to improve the fuel properties PT-char, and therefore, making it a suitable potential fuel source. , Thesis (MSc) -- Faculty of Science, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Dube, Cleopatra Thulani
- Date: 2021-12
- Subjects: Pyrolysis , Solid fuel reactors
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/58439 , vital:59241
- Description: he thermal decomposition of waste tyres via pyrolysis is considered to be amongst the most promising methods of recycling tyres due to its minimal environmental impact (in terms of reduction in pollution). During pyrolysis, tyres are thermally degraded in an inert environment to produce gas, oil and char. The gas and oil have promising commercialization prospects while the char remains a pollutant despite the strides made in a lot of research to upgrade the char to carbon black, activated carbon and even for reuse as a filler in tyre manufacture. For pyrolysis to be profitable, or worthy of investments, all three of its products (oil, char and gas) need to be valorised. Pyrolysis-derived tyre chars (PT-char) have an energy value equivalent to high rank coals, however, the use of PT char as a solid fuel is uncommon due to the high contents of sulphur and mineral matter as well as low volatile matter content of the PT-char. As such, the combustion of PT-char is characterised by high ignition temperature, low thermal reactivity, and no flame formation due to the low amounts of volatile matter. On the other hand, biomass are clean, renewable feedstock, having low sulphur and mineral matter contents, as well as high thermal reactivity. The blending of PT-char with biomass could potentially improve the combustion properties of PT-char and minimise the release of toxic emissions from the char, and thus, could make PT-char suitable for use as a fuel source. In this study, PT-char was blended with torrefied wood and microalgae biomass to demonstrate the suitability of using PT-char-biomass-fuel blend as an energy feedstock. To this effect, a mixture design of experiments was used to formulate the PT-char biomass blends and regression analysis was employed to select an optimum blend formulation for the combustion and mechanical properties of the blends. Proximate analysis results showed a non-linear increase in the volatile matter and a non-linear decrease in the fixed carbon and ash yield as the biomass ratio increased. The calorific value also increased on an additive basis with increasing biomass proportion. The elemental analysis results showed a decrease in the calcium, zinc and bromine contents and an increase in the potassium and iron contents increased with increasing biomass proportion. Likewise, the sulphur content decreased while the oxygen, hydrogen and nitrogen contents increased with increasing biomass ratio. vi Thus, the fuel properties of the blends improved with increasing biomass ratio and without compromising the calorific value of the PT-char. Moreover, the TG-MS analysis showed that the PT-char and the respective blends did not show any release SO2 up to 650°C. Thus, making the fuel suitable for use in low temperature applications such as household and certain boilers. The results of the regression analysis showed that the blend formulation with the highest proportions of biomass, thus C55-T30-M15, is the optimum blend to produce a solid fuel with a low initial decomposition (214°C) and char ignition temperatures (532°C) as well as maximum burn-out temperature (640°C). In essence, the high thermal reactivity of PT-char is improved when both biomasses are loaded at maximum ratios as per the experimental design. The results of the MS showed a decrease in CO2 and NO2 emissions with increasing biomass proportion. The optimum blend (C55-T30-M15) was found to have a comparably higher gross calorific value (26 MJ/kg), lower sulphur content (1.1 wt.%), low ash yield (11wt.%) and lower concentration of minerals (i.e. zinc) than raw PT-char. In addition, the volatile matter content of the blend (20 wt.%) was found to be higher than that of PT-char and the ignition temperature of the optimum fuel blend was relatively lower and its burnout temperature higher than that of PT char. The MS results revealed that the CO2 and NO2 emissions were higher in the optimum blend than the PT-char. The mechanical properties of the pellets; impact resistance and compressive strength increased with increasing biomass blending ratio and even more so with increasing microalgae ratio. The C55-T30-M15 and C75-T10-M15 were selected as optimum blends using regression analysis and both blends exceeded the benchmark for mechanical properties except for water resistance. The blending did not improve the water resistance and all the blends did not meet the minimum threshold for water resistance. Overall, the blending of PT-char with torrefied wood and microalgae biomass has shown to improve the fuel properties PT-char, and therefore, making it a suitable potential fuel source. , Thesis (MSc) -- Faculty of Science, 2021
- Full Text:
- Date Issued: 2021-12
Bicultural voice in three works
- Authors: Nkuna, Musa Duke
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54607 , vital:46769
- Description: This portfolio of compositions is made up of two parts: Part one is a commentary on the works presented in the portfolio. As required by Nelson Mandela University for the degree of DMus, the commentary is a descriptive narrative, rather than an analysis, of the works. It forms a basic guide for the listener as to how these works were conceived and constructed, and how both African and Western music elements have been used in order to achieve a syncretism. My commentary endeavours to show the compositional techniques applied when writing these works, and how my cultural interactions, music training and experience as a professional opera singer influence my compositional output. Part two contains the creative content of the portfolio: a set of scores of the three works themselves, as well as accompanying recordings of these works, with a total duration of ca. 100 minutes of music. It forms the main part of the submission. , Thesis (DMA) -- Faculty of Humanities, Department of Music and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Nkuna, Musa Duke
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54607 , vital:46769
- Description: This portfolio of compositions is made up of two parts: Part one is a commentary on the works presented in the portfolio. As required by Nelson Mandela University for the degree of DMus, the commentary is a descriptive narrative, rather than an analysis, of the works. It forms a basic guide for the listener as to how these works were conceived and constructed, and how both African and Western music elements have been used in order to achieve a syncretism. My commentary endeavours to show the compositional techniques applied when writing these works, and how my cultural interactions, music training and experience as a professional opera singer influence my compositional output. Part two contains the creative content of the portfolio: a set of scores of the three works themselves, as well as accompanying recordings of these works, with a total duration of ca. 100 minutes of music. It forms the main part of the submission. , Thesis (DMA) -- Faculty of Humanities, Department of Music and Performing Arts, 2021
- Full Text:
- Date Issued: 2021-12
Climate change and food security in South Africa
- Authors: Xola, Dungelo
- Date: 2021-12
- Subjects: Food security -- Climatic factors -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/${Handle} , vital:45720
- Description: Climate change continues to pose a threat to mankind. Its impacts are evident in both developed and developing countries. South Africa is a no exception to the climate change problems. Climate change in South Africa has affected water availability which subsequently affects food security of the country. This research study investigated the impacts of climate change on food security in South Africa. South Africa’s food security is severely affected by climate change and as a result, the South African government through the Department of Agriculture, Forestry and Fisheries has devised strategies to respond to climate change and ensure food security in the country. The study analysed government documents and articles about climate change from 2008 to 2018. The study employed content analysis as a data analysis method and the study developed eighteen codes and from those codes, four themes emerged. The research findings highlight that South Africa is a food secure nation only at a national level. In addition, the findings highlighted that climate change poses a significant threat on the agricultural sector which ultimately affects food security in South Africa. The climate change impacts in South Africa include an increase in temperatures, rise in sea water levels, and floods. Climate change in South Africa continues to pose a significant threat in the GDP as it affects crop production and livestock farming, which ultimately affects the exports of the country. , Thesis (MA) -- Faculty of Business and Economic Sciences, Economics, Development & Tourism, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Xola, Dungelo
- Date: 2021-12
- Subjects: Food security -- Climatic factors -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/${Handle} , vital:45720
- Description: Climate change continues to pose a threat to mankind. Its impacts are evident in both developed and developing countries. South Africa is a no exception to the climate change problems. Climate change in South Africa has affected water availability which subsequently affects food security of the country. This research study investigated the impacts of climate change on food security in South Africa. South Africa’s food security is severely affected by climate change and as a result, the South African government through the Department of Agriculture, Forestry and Fisheries has devised strategies to respond to climate change and ensure food security in the country. The study analysed government documents and articles about climate change from 2008 to 2018. The study employed content analysis as a data analysis method and the study developed eighteen codes and from those codes, four themes emerged. The research findings highlight that South Africa is a food secure nation only at a national level. In addition, the findings highlighted that climate change poses a significant threat on the agricultural sector which ultimately affects food security in South Africa. The climate change impacts in South Africa include an increase in temperatures, rise in sea water levels, and floods. Climate change in South Africa continues to pose a significant threat in the GDP as it affects crop production and livestock farming, which ultimately affects the exports of the country. , Thesis (MA) -- Faculty of Business and Economic Sciences, Economics, Development & Tourism, 2021
- Full Text:
- Date Issued: 2021-12
Communal property associations and protected areas management: some participation controversies in Dwesa-Cwebe Nature Reserve, Eastern Cape
- Authors: Zwelakhe, Loyiso
- Date: 2021-12
- Subjects: National parks and reserves -- South Africa -- Eastern Cape -- Management
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54355 , vital:46478
- Description: The management and protection of protected areas such as nature reserves remains a primary concern for the different stakeholders involved; especially the marginalised rural communities that are deprived of genuine ownership of the natural resources. The representation of the marginalised rural communities adjacent to the protected areas has become significant in the control and utilisation of natural resources in protected areas. Communal Property Associations (CPAs) were established to help represent their communities in such matters of natural resources ownership and control. Despite; the formation of the CPAs, the participation of these associations in the management of the nature reserve in Dwesa-Cwebe has been questioned and under scrutiny. Therefore, this study seeks to understand the dynamics around the participation of the Dwesa-Cwebe Community Property Association in the management of Dwesa-Cwebe Nature Reserve. The study sought to find out experiences of the members of Dwesa-Cwebe CPA regarding their participation in the management of Dwesa-Cwebe Nature Reserve. Some questions needed to be answered, such as: To what extent is the membership in Dwesa-Cwebe CPAs a true representation of the needs of the local communities in the management of Dwesa-Cwebe Nature Reserve? What are the challenges faced by the members of the Dwesa-Cwebe CPA in representing the local communities in the management of the Dwesa-Cwebe Nature Reserve? What recommendations can be provided to solve the challenges faced by the Dwesa-Cwebe CPA in the management of Dwesa-Cwebe Nature Reserve? The study utilised a qualitative research methodology to obtain the answers to the main research questions. The study utilised convenience sampling to select ten suitable participants who were prepared to participate in the study and who are members of the CPA from Dwesa-Cwebe area. The research used interviews and non-participant observation to gather data. The collected data was analysed using thematic analysis. The analysis of the data revealed that there is limited participation by the CPA members in the management of Dwesa-Cwebe Nature Reserve. The study’s findings also indicated the CPA members are not involved in the management of the utilisation of generated revenue. The findings of this study also revealed that there are benefits that are entrenched in the participation of CPA members in the activities of the Dwesa-Cwebe Nature Reserve. However, the participation mechanisms are not producing the desired outcomes. Based on these findings the study recommends that the management of the Dwesa-Cwebe Nature Reserve review their management approach so as to ensure effective participation by CPA members. Further, there is a need to produce reports that update the Dwesa-Cwebe community on how the management of the nature reserve is utilising the generated revenue and its development plans. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Zwelakhe, Loyiso
- Date: 2021-12
- Subjects: National parks and reserves -- South Africa -- Eastern Cape -- Management
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54355 , vital:46478
- Description: The management and protection of protected areas such as nature reserves remains a primary concern for the different stakeholders involved; especially the marginalised rural communities that are deprived of genuine ownership of the natural resources. The representation of the marginalised rural communities adjacent to the protected areas has become significant in the control and utilisation of natural resources in protected areas. Communal Property Associations (CPAs) were established to help represent their communities in such matters of natural resources ownership and control. Despite; the formation of the CPAs, the participation of these associations in the management of the nature reserve in Dwesa-Cwebe has been questioned and under scrutiny. Therefore, this study seeks to understand the dynamics around the participation of the Dwesa-Cwebe Community Property Association in the management of Dwesa-Cwebe Nature Reserve. The study sought to find out experiences of the members of Dwesa-Cwebe CPA regarding their participation in the management of Dwesa-Cwebe Nature Reserve. Some questions needed to be answered, such as: To what extent is the membership in Dwesa-Cwebe CPAs a true representation of the needs of the local communities in the management of Dwesa-Cwebe Nature Reserve? What are the challenges faced by the members of the Dwesa-Cwebe CPA in representing the local communities in the management of the Dwesa-Cwebe Nature Reserve? What recommendations can be provided to solve the challenges faced by the Dwesa-Cwebe CPA in the management of Dwesa-Cwebe Nature Reserve? The study utilised a qualitative research methodology to obtain the answers to the main research questions. The study utilised convenience sampling to select ten suitable participants who were prepared to participate in the study and who are members of the CPA from Dwesa-Cwebe area. The research used interviews and non-participant observation to gather data. The collected data was analysed using thematic analysis. The analysis of the data revealed that there is limited participation by the CPA members in the management of Dwesa-Cwebe Nature Reserve. The study’s findings also indicated the CPA members are not involved in the management of the utilisation of generated revenue. The findings of this study also revealed that there are benefits that are entrenched in the participation of CPA members in the activities of the Dwesa-Cwebe Nature Reserve. However, the participation mechanisms are not producing the desired outcomes. Based on these findings the study recommends that the management of the Dwesa-Cwebe Nature Reserve review their management approach so as to ensure effective participation by CPA members. Further, there is a need to produce reports that update the Dwesa-Cwebe community on how the management of the nature reserve is utilising the generated revenue and its development plans. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Community development and sustainable livelihoods: the Jeffrey’s Bay wind farm cattle farming co-operative, South Africa
- Authors: Mnwana, Zandile
- Date: 2021-12
- Subjects: Community development -- South Africa , Agriculture, Cooperative -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54925 , vital:48481
- Description: In the South African context, co-operatives are mostly established to ease the impact of unemployment and poverty, particularly in rural communities. The Kruisfontein Cattle Farming Co-operative is no different, as it was formed by a group of farmers who were looking into converting their herd from that of a poor genetic quality, low-value breed to a superior quality breed. These farmers were all facing similar challenges prior to forming the co-operative and they hoped that through working together they would be able to overcome some of the challenges they faced and thus become a successful co-operative that can compete with established farmers. The Jeffery’s Bay Wind Farm carried a mandate from the Department of Energy, through the REIPPP, to ensure that a portion of its profits is redirected to assist communities that are within a 50km radius of the JBWF. The Kruisfontein Cattle Farming Co-operative became part of the programme and the JBWF’s project manager became the person responsible for the smooth running of the programme. However, research conducted in this field has revealed that in most cases project managers in the renewable energy sector encounter challenges when implementing community development initiatives and they may lack an in-depth understanding of what community or social development entails, as it might not necessarily be an area of expertise for them. Therefore, this study aimed to explore how the Kruisfontein Cattle Farming Co-operative has influenced the livelihoods of the beneficiaries. The theories that were adopted and deemed applicable to this study included the traditional modernisation theory, dependency theory and sustainable development. The study employed a qualitative approach and a case study research design. The study made use of primary data collected through semi-structured interviews and documents, and an interview schedule was employed to carry out the interviews. In terms of sampling, the researcher made use of convenience sampling, which is a form of non-probability sampling. All the members of the Kruisfontein Cattle Farming Co-operative, which was the entire population of the study, were interviewed, thus making the sample type a census. The study explored how the Kruisfontein Cattle Farming Co-operative has influenced the livelihoods of the beneficiaries and revealed that since the involvement of the JBWF, the co-operative has recorded several achievements such as fencing around the grazing land and cattle kraal as well as calves of a superior breed that will enable the beneficiaries to receive good prices when selling their cattle. However, the co-operative is faced with challenges associated with weak livelihood assets, as the asset pentagon illustrated that the beneficiaries have moderate access to physical, human and social capital, while their natural capital is low, and their financial capital is significantly low. An overreliance on nature-based activities as a livelihood strategy is also a challenge facing the co-operative. Lastly, notwithstanding the abovementioned challenges, it can be concluded that the Kruisfontein Cattle Farming Co-operative has had a positive influence on the livelihoods of the beneficiaries, as they indicated that they experienced reduced vulnerability through the fenced grazing land and anticipated an improvement in their financial capital status through the increased income they would receive from selling cattle of a superior breed. , Thesis (MADS) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mnwana, Zandile
- Date: 2021-12
- Subjects: Community development -- South Africa , Agriculture, Cooperative -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54925 , vital:48481
- Description: In the South African context, co-operatives are mostly established to ease the impact of unemployment and poverty, particularly in rural communities. The Kruisfontein Cattle Farming Co-operative is no different, as it was formed by a group of farmers who were looking into converting their herd from that of a poor genetic quality, low-value breed to a superior quality breed. These farmers were all facing similar challenges prior to forming the co-operative and they hoped that through working together they would be able to overcome some of the challenges they faced and thus become a successful co-operative that can compete with established farmers. The Jeffery’s Bay Wind Farm carried a mandate from the Department of Energy, through the REIPPP, to ensure that a portion of its profits is redirected to assist communities that are within a 50km radius of the JBWF. The Kruisfontein Cattle Farming Co-operative became part of the programme and the JBWF’s project manager became the person responsible for the smooth running of the programme. However, research conducted in this field has revealed that in most cases project managers in the renewable energy sector encounter challenges when implementing community development initiatives and they may lack an in-depth understanding of what community or social development entails, as it might not necessarily be an area of expertise for them. Therefore, this study aimed to explore how the Kruisfontein Cattle Farming Co-operative has influenced the livelihoods of the beneficiaries. The theories that were adopted and deemed applicable to this study included the traditional modernisation theory, dependency theory and sustainable development. The study employed a qualitative approach and a case study research design. The study made use of primary data collected through semi-structured interviews and documents, and an interview schedule was employed to carry out the interviews. In terms of sampling, the researcher made use of convenience sampling, which is a form of non-probability sampling. All the members of the Kruisfontein Cattle Farming Co-operative, which was the entire population of the study, were interviewed, thus making the sample type a census. The study explored how the Kruisfontein Cattle Farming Co-operative has influenced the livelihoods of the beneficiaries and revealed that since the involvement of the JBWF, the co-operative has recorded several achievements such as fencing around the grazing land and cattle kraal as well as calves of a superior breed that will enable the beneficiaries to receive good prices when selling their cattle. However, the co-operative is faced with challenges associated with weak livelihood assets, as the asset pentagon illustrated that the beneficiaries have moderate access to physical, human and social capital, while their natural capital is low, and their financial capital is significantly low. An overreliance on nature-based activities as a livelihood strategy is also a challenge facing the co-operative. Lastly, notwithstanding the abovementioned challenges, it can be concluded that the Kruisfontein Cattle Farming Co-operative has had a positive influence on the livelihoods of the beneficiaries, as they indicated that they experienced reduced vulnerability through the fenced grazing land and anticipated an improvement in their financial capital status through the increased income they would receive from selling cattle of a superior breed. , Thesis (MADS) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Contribution of the Community Works Programme (CWP) on poverty alleviation in the Western Cape Province
- Authors: Tshomela, Buyiswa Ellen
- Date: 2021-12
- Subjects: Community development -- South Africa -- Western Cape , Poverty -- Prevention -- Economic aspects -- South Africa -- Western Cape
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54652 , vital:46880
- Description: To address the persistent challenge of the high level of unemployment, poverty, and inequalities, in 2006, the South African government initiated the Community Works Programme that provides an employment safety net for people living in marginalized areas where access to employment opportunities is very limited. The study aims to investigate the contribution of the CWP on poverty alleviation in the Western Cape Province. A qualitative research approach and a qualitative survey questionnaire were used to conduct the study in the Western Cape Province of South Africa. The WC Province has a total target of 17 700 participants in the 27 sites established across seven districts with an average site size of 656 participants. A purposive stratified sampling technique was used to sample 90 participants. Semi-structured interviews, with open-ended questions, were conducted with all the 90 respondents. A thematic content data analysis process was used to analyse data. Findings such as positive contribution or benefits of the programme, economic benefits, personal development, and capacity building, and enhanced economic inclusion and opportunities will be discussed in this study. Recommendations will be made based on the findings of the study. The research findings have shown that the dominant perception expressed by the participants of the CWP was that the program has made a significant contribution to their livelihood. The primary research data also showed that most of the participants utilized the wages received from the programme to buy food, pay for municipal services, pay family educational needs, pay for personal educational needs, demonstrating that the CWP has made a significant contribution to the livelihood of the participants. The literature review reflected that with the high level of unemployment in South Africa, the conditions that necessitated the implementation of this kind of community public works programme remain intact and the intended beneficiaries remain vulnerable and marginalised. , Thesis (MA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Tshomela, Buyiswa Ellen
- Date: 2021-12
- Subjects: Community development -- South Africa -- Western Cape , Poverty -- Prevention -- Economic aspects -- South Africa -- Western Cape
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54652 , vital:46880
- Description: To address the persistent challenge of the high level of unemployment, poverty, and inequalities, in 2006, the South African government initiated the Community Works Programme that provides an employment safety net for people living in marginalized areas where access to employment opportunities is very limited. The study aims to investigate the contribution of the CWP on poverty alleviation in the Western Cape Province. A qualitative research approach and a qualitative survey questionnaire were used to conduct the study in the Western Cape Province of South Africa. The WC Province has a total target of 17 700 participants in the 27 sites established across seven districts with an average site size of 656 participants. A purposive stratified sampling technique was used to sample 90 participants. Semi-structured interviews, with open-ended questions, were conducted with all the 90 respondents. A thematic content data analysis process was used to analyse data. Findings such as positive contribution or benefits of the programme, economic benefits, personal development, and capacity building, and enhanced economic inclusion and opportunities will be discussed in this study. Recommendations will be made based on the findings of the study. The research findings have shown that the dominant perception expressed by the participants of the CWP was that the program has made a significant contribution to their livelihood. The primary research data also showed that most of the participants utilized the wages received from the programme to buy food, pay for municipal services, pay family educational needs, pay for personal educational needs, demonstrating that the CWP has made a significant contribution to the livelihood of the participants. The literature review reflected that with the high level of unemployment in South Africa, the conditions that necessitated the implementation of this kind of community public works programme remain intact and the intended beneficiaries remain vulnerable and marginalised. , Thesis (MA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Coordination polymers for denitrogenation of fuel oils
- Authors: Dembaremba, Tendai O
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53630 , vital:45682
- Description: In this thesis, we present adsorptive removal of nitrogen-containing compounds from fuel oil as an alternative to complement conventional hydrotreatment to obtain ultra-low sulfur and nitrogen levels. This is in cognizance of the challenges nitrogen-containing compounds pose to the hydrotreatment process, particularly their inhibition and/or poisoning of the catalysts used in the process, of which basic nitrogen-containing compounds are the major culprits. Selectivity is the biggest challenge for adsorptive removal of nitrogen-containing compounds. We explore reticular synthesis of metal organic frameworks and the use of coordinatively unsaturated metal sites in 1-dimensional coordination polymers to achieve good selectivity for nitrogen-containing compounds. In the first part of the thesis, reticular synthesis of metal organic frameworks to control the size of the cavity, and strategically use the linkers and metal centres was envisaged. In this work we explored variation of the metal centres in the secondary building units (SBUs of the MOFs as the first step to the testing and implementation of the design strategies. Carbazole, representing carbazoles which the major compounds that remain in hydrotreated fuel, was the target compound. Four MOFs of zinc (Zn-CDC-bpe), copper (Cu-CDC-bpe), nickel (Ni-CDC-bpe) and cobalt (Co-CDC-bpe) based on the formation of a dinuclear metal paddlewheel SBUs with the ligand 9H-Carbazole-3,6-dicarboxylic acid (H2CDC) and occupation of the axial positions of the paddlewheel by 1,2-Bis(4-pyridyl)ethane (bpe) to form porous networks were synthesized. A fifth MOF containing only CDC which forms a [Zn4O(O2C-R)5(O2HC-R)] SBU was also synthesized (Zn-CDC). The ligand H2CDC was inspired by the possibility of improving selectivity for carbazole via π–π interactions through the more preferred parallel-offset stacking as well as the possibility for further substitution of the carbazole N-H to add groups that improve selectivity. The sizes of the MOF cavities can then be controlled by choosing different lengths of ligands analogous to 1,2-Bis(4-pyridyl)ethane (bpe), e.g. 4,4’-bipyridine and pyrazine. All the MOFs showed good selectivity of carbazole. The Zn-CDC MOF also had good selectivity for the basic nitrogen-containing compounds tested: quinoline, isoquinoline, quinaldine and 1-naphthylamine. Its uptake of carbazole was also slightly higher. This was attributed to the presence of an unsaturated Zn site in the SBU. Adsorption in all the MOFs was primarily due to physisorption. It was concluded that the role of the metal centre does not play a significant role in the adsorption of carbazole besides providing a template for reticular synthesis. , Thesis (PhD) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text: false
- Date Issued: 2021-12
- Authors: Dembaremba, Tendai O
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53630 , vital:45682
- Description: In this thesis, we present adsorptive removal of nitrogen-containing compounds from fuel oil as an alternative to complement conventional hydrotreatment to obtain ultra-low sulfur and nitrogen levels. This is in cognizance of the challenges nitrogen-containing compounds pose to the hydrotreatment process, particularly their inhibition and/or poisoning of the catalysts used in the process, of which basic nitrogen-containing compounds are the major culprits. Selectivity is the biggest challenge for adsorptive removal of nitrogen-containing compounds. We explore reticular synthesis of metal organic frameworks and the use of coordinatively unsaturated metal sites in 1-dimensional coordination polymers to achieve good selectivity for nitrogen-containing compounds. In the first part of the thesis, reticular synthesis of metal organic frameworks to control the size of the cavity, and strategically use the linkers and metal centres was envisaged. In this work we explored variation of the metal centres in the secondary building units (SBUs of the MOFs as the first step to the testing and implementation of the design strategies. Carbazole, representing carbazoles which the major compounds that remain in hydrotreated fuel, was the target compound. Four MOFs of zinc (Zn-CDC-bpe), copper (Cu-CDC-bpe), nickel (Ni-CDC-bpe) and cobalt (Co-CDC-bpe) based on the formation of a dinuclear metal paddlewheel SBUs with the ligand 9H-Carbazole-3,6-dicarboxylic acid (H2CDC) and occupation of the axial positions of the paddlewheel by 1,2-Bis(4-pyridyl)ethane (bpe) to form porous networks were synthesized. A fifth MOF containing only CDC which forms a [Zn4O(O2C-R)5(O2HC-R)] SBU was also synthesized (Zn-CDC). The ligand H2CDC was inspired by the possibility of improving selectivity for carbazole via π–π interactions through the more preferred parallel-offset stacking as well as the possibility for further substitution of the carbazole N-H to add groups that improve selectivity. The sizes of the MOF cavities can then be controlled by choosing different lengths of ligands analogous to 1,2-Bis(4-pyridyl)ethane (bpe), e.g. 4,4’-bipyridine and pyrazine. All the MOFs showed good selectivity of carbazole. The Zn-CDC MOF also had good selectivity for the basic nitrogen-containing compounds tested: quinoline, isoquinoline, quinaldine and 1-naphthylamine. Its uptake of carbazole was also slightly higher. This was attributed to the presence of an unsaturated Zn site in the SBU. Adsorption in all the MOFs was primarily due to physisorption. It was concluded that the role of the metal centre does not play a significant role in the adsorption of carbazole besides providing a template for reticular synthesis. , Thesis (PhD) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text: false
- Date Issued: 2021-12
Corporate social responsibility from the community perspective
- Authors: De Kock, Breched Richard
- Date: 2021-12
- Subjects: Social responsibility of business -- South Africa -- Northern Cape
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53846 , vital:46016
- Description: Corporate Social Responsibility (CSR) is a strategy that is used by organisations to take responsibility for the social and environmental responsibility of where they are operating. The organisation has to make sure that the community in which they are operating benefits from their operations through Corporate Social Responsibility (CSR). The researcher conducted this study which focuses on the developmental side of Corporate Social Responsibility (CSR) as an instrument for supplementing the role of governments in developing communities, particularly in the Northern Cape, South Africa, where poverty and underdevelopment have become prevalent. The study explores CSR investments from a community perspective, community participation, supporting enterprise and social trust development within the respective communities. While Renewable Energy Independent Power Producers (REIPP) made every effort to implement CSR as part of their contribution to developing the communities they operate in, CSR is used as a tick box exercise for many. While some of these companies do it for more than just bragging rights, these CSR strategies normally follow a top-down approach. Some of these implementation programmes are purely based on desktop research and are so far removed from the current realities and needs of the communities that the money and effort spend does not have the multiplier effect that everyone desires. The study aimed to analyse Corporate Social Responsibility (CSR) from a community perspective, thus, the study explored the view of the community on Corporate Social Responsibility (CSR). The study discovered that many of the respondents have a general understanding of CSR and how it should impact the community. This impact, however, is not being seen with the research indicating that most of the youth are uneducated and unemployed. The majority have also pointed towards dissatisfaction and the lack of trust in how the government and REIPP are applying the renewable energy sector CSR principles within these communities. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: De Kock, Breched Richard
- Date: 2021-12
- Subjects: Social responsibility of business -- South Africa -- Northern Cape
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53846 , vital:46016
- Description: Corporate Social Responsibility (CSR) is a strategy that is used by organisations to take responsibility for the social and environmental responsibility of where they are operating. The organisation has to make sure that the community in which they are operating benefits from their operations through Corporate Social Responsibility (CSR). The researcher conducted this study which focuses on the developmental side of Corporate Social Responsibility (CSR) as an instrument for supplementing the role of governments in developing communities, particularly in the Northern Cape, South Africa, where poverty and underdevelopment have become prevalent. The study explores CSR investments from a community perspective, community participation, supporting enterprise and social trust development within the respective communities. While Renewable Energy Independent Power Producers (REIPP) made every effort to implement CSR as part of their contribution to developing the communities they operate in, CSR is used as a tick box exercise for many. While some of these companies do it for more than just bragging rights, these CSR strategies normally follow a top-down approach. Some of these implementation programmes are purely based on desktop research and are so far removed from the current realities and needs of the communities that the money and effort spend does not have the multiplier effect that everyone desires. The study aimed to analyse Corporate Social Responsibility (CSR) from a community perspective, thus, the study explored the view of the community on Corporate Social Responsibility (CSR). The study discovered that many of the respondents have a general understanding of CSR and how it should impact the community. This impact, however, is not being seen with the research indicating that most of the youth are uneducated and unemployed. The majority have also pointed towards dissatisfaction and the lack of trust in how the government and REIPP are applying the renewable energy sector CSR principles within these communities. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Corrosion and hydrogen resistant modified zirlo surfaces for nuclear fuel cladding
- Authors: Ngongo, Sinoyolo
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54077 , vital:46252
- Description: Zirconium (Zr) alloys are used as fuel cladding material in all modern water cooled commercial nuclear reactors. Zr alloys have many desirable properties for the nuclear reactor core environment, however, it also has a weakness in that overheated zirconium alloy fuel rods react with hot steam resulting in the release of hydrogen. High temperatures increase the oxidation rate and hence the hydrogen production rate which in turn increase the risk of a hydrogen gas explosion such as what is surmised to have happened in the 2011 Fukushima Daiichi nuclear plant incident. The some of the hydrogen produced will also diffuse into the zirconium alloy and form zirconium hydrides which will weaken the original zirconium alloy material. The development of accident tolerant fuel became a major focus area after the Fukushima event in March 2011 with the U.S. congress directing the U.S. Department of Energy to develop fuel with enhanced accident tolerance at high temperatures. The main objective in the case of zirconium alloy cladding has been the modification of cladding surface layers by coating or doping in order to reduce the oxidation rate and hydrogen generation rate by the reaction of steam with zirconium alloy cladding at high temperatures. This thesis focuses on two surface modifications to decrease the surface corrosion rate of ZIRLOTM (the Zr alloy used in this study) and reduce hydrogen uptake by ZIRLO. The first modification involves an oxidation-resistant nano-crystalline diamond (NCD) film deposited on ZIRLO. The NCD layer was deposited in a microwave plasma-enhanced linear antenna chemical vapor deposition (MW-LA-PECVD) system after immersion of the ZIRLO tubes in a water-based solution containing nanodiamonds. ZIRLO tube samples were coated with 200 nm and 500 nm thick NCD layers. The 200 nm thick NCD coated ZIRLO was kept as control sample whereas the 500 nm thick NCD coated ZIRLO was exposed to steam oxidation at 360 °C for 90 days. The results revealed that the NCD exfoliated in some areas leaving the ZIRLO exposed to the steam. In the areas where the diamond did not exfoliate, the diamond was still attached to the ZIRLO with an amorphous carbon layer present between the NCD and the zirconium oxide layer.The transmission electron microscopy (TEM) results of this study indicate the presence a sp3 – hybridised diamond phase for the NCD layer as well as an intermediate amorphous carbon layer between the NCD and ZrO2 layers. Analyses of the area where the NCD layer had exfoliated showed no evidence of an NCD layer. It is possible that the amorphous carbon layer between the diamond and the zirconium oxide is responsible for weak interfacial bonding leading to partial exfoliation during oxidation in steam 360 °C for 90 days. In the second modification, the effectiveness of a Cr doped ZrO2 layer to reduce the migration rate of hydrogen in ZrO2 was investigated. The ZIRLO tube used for this part of the study did not have a thin oxide passivation surface layer. Two different procedures were used to create chromium doped zirconium oxide surface layers on ZIRLO. The ZIRLO surface was coated with chromium using cathodic arc deposition followed compression plasma flow (CPF) treatment to facilitate intermixing of the Cr and the ZIRLO. In procedure 1, the surface modification was achieved through the incorporation of chromium into the zirconium surface layer using a compression plasma flow (CPF) technique, followed by the oxidation of the chromium doped zirconium. The oxidation process was conducted at 500 °C for 6 hours. In procedure 2, the chromium was incorporated into the zirconium oxide layer again using the CPF technique. Hydrogen desorption was measured from pure ZIRLO and CPF modified samples using a special gas reaction controller system. The key finding of the results is that the chromium doped (incorporated) zirconium oxide layer on ZIRLO sample exhibited the lowest hydrogen desorption rate of all the samples analysed. This indicates that H in the Cr doped zirconium oxide layer had the lowest mobility of all the samples investigated. This is consistent with the theoretical predictions that the doping of ZrO2 by Cr reduces the solubility of hydrogen in ZrO2. , Thesis (PhD) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
- Full Text: false
- Date Issued: 2021-12
- Authors: Ngongo, Sinoyolo
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54077 , vital:46252
- Description: Zirconium (Zr) alloys are used as fuel cladding material in all modern water cooled commercial nuclear reactors. Zr alloys have many desirable properties for the nuclear reactor core environment, however, it also has a weakness in that overheated zirconium alloy fuel rods react with hot steam resulting in the release of hydrogen. High temperatures increase the oxidation rate and hence the hydrogen production rate which in turn increase the risk of a hydrogen gas explosion such as what is surmised to have happened in the 2011 Fukushima Daiichi nuclear plant incident. The some of the hydrogen produced will also diffuse into the zirconium alloy and form zirconium hydrides which will weaken the original zirconium alloy material. The development of accident tolerant fuel became a major focus area after the Fukushima event in March 2011 with the U.S. congress directing the U.S. Department of Energy to develop fuel with enhanced accident tolerance at high temperatures. The main objective in the case of zirconium alloy cladding has been the modification of cladding surface layers by coating or doping in order to reduce the oxidation rate and hydrogen generation rate by the reaction of steam with zirconium alloy cladding at high temperatures. This thesis focuses on two surface modifications to decrease the surface corrosion rate of ZIRLOTM (the Zr alloy used in this study) and reduce hydrogen uptake by ZIRLO. The first modification involves an oxidation-resistant nano-crystalline diamond (NCD) film deposited on ZIRLO. The NCD layer was deposited in a microwave plasma-enhanced linear antenna chemical vapor deposition (MW-LA-PECVD) system after immersion of the ZIRLO tubes in a water-based solution containing nanodiamonds. ZIRLO tube samples were coated with 200 nm and 500 nm thick NCD layers. The 200 nm thick NCD coated ZIRLO was kept as control sample whereas the 500 nm thick NCD coated ZIRLO was exposed to steam oxidation at 360 °C for 90 days. The results revealed that the NCD exfoliated in some areas leaving the ZIRLO exposed to the steam. In the areas where the diamond did not exfoliate, the diamond was still attached to the ZIRLO with an amorphous carbon layer present between the NCD and the zirconium oxide layer.The transmission electron microscopy (TEM) results of this study indicate the presence a sp3 – hybridised diamond phase for the NCD layer as well as an intermediate amorphous carbon layer between the NCD and ZrO2 layers. Analyses of the area where the NCD layer had exfoliated showed no evidence of an NCD layer. It is possible that the amorphous carbon layer between the diamond and the zirconium oxide is responsible for weak interfacial bonding leading to partial exfoliation during oxidation in steam 360 °C for 90 days. In the second modification, the effectiveness of a Cr doped ZrO2 layer to reduce the migration rate of hydrogen in ZrO2 was investigated. The ZIRLO tube used for this part of the study did not have a thin oxide passivation surface layer. Two different procedures were used to create chromium doped zirconium oxide surface layers on ZIRLO. The ZIRLO surface was coated with chromium using cathodic arc deposition followed compression plasma flow (CPF) treatment to facilitate intermixing of the Cr and the ZIRLO. In procedure 1, the surface modification was achieved through the incorporation of chromium into the zirconium surface layer using a compression plasma flow (CPF) technique, followed by the oxidation of the chromium doped zirconium. The oxidation process was conducted at 500 °C for 6 hours. In procedure 2, the chromium was incorporated into the zirconium oxide layer again using the CPF technique. Hydrogen desorption was measured from pure ZIRLO and CPF modified samples using a special gas reaction controller system. The key finding of the results is that the chromium doped (incorporated) zirconium oxide layer on ZIRLO sample exhibited the lowest hydrogen desorption rate of all the samples analysed. This indicates that H in the Cr doped zirconium oxide layer had the lowest mobility of all the samples investigated. This is consistent with the theoretical predictions that the doping of ZrO2 by Cr reduces the solubility of hydrogen in ZrO2. , Thesis (PhD) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
- Full Text: false
- Date Issued: 2021-12
Customer experience at the East London fresh produce market
- Authors: Matyobeni, Akhona
- Date: 2021-12
- Subjects: Produce trade -- South Africa -- East London -- Marketing , Consumer satisfaction -- South Africa -- East London
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54069 , vital:46217
- Description: Fresh Produce Markets are an important sector in the agricultural value chain. The discussions on land expropriation, food security and job creation all demonstrate the potential that still exists within agriculture. The Fresh Produce Markets remain a solution to the distribution of food in South Africa and their existence remains relevant. Fresh Produce Markets in South Africa combined, generate about R15 billion, by distributing about 3 million tons of fresh produce. The main contributors to this success are the customers who are loyal to Fresh Produce Markets, regardless of distances these customers travel to get to Fresh Produce Markets. This study intends to understand how the East London Fresh Produce Market can put customer needs at the centre of their business, resulting in good Customer Experience. Positive customer experience promotes customer loyalty and assists organisations in encouraging brand advocacy. While customer experience has been explored in several contexts, regions and industries, customer experience at the East London Fresh Produce Market has not been measured. The literature review conducted investigated the field of customer experience. This literature review assisted in developing a conceptual model for customer experience for the East London Fresh Produce Market. This study follows a positivistic research approach, using quantitative methods of analysis. Exploratory factor analysis was conducted using data gathered from a questionnaire disseminated in hard copies and via e-mail. The sample of this study was selected at random using convenience and snowball sampling. A sample size of n = 210 was used in this study. Descriptive and inferential statistical analysis were conducted. The primary contribution of this study was the presentation and statistical assessment of an exploratory factor analysis of factors influencing customer experience at the East London Fresh Produce Market. This study found that the independent factors of Brand Experience, Service Experience and Post-purchase/Consumption Experience all have a positive effect on the overall customer experience and on each other. Furthermore, the statistical assessment suggested new factors of Product Quality and Range(s), Brand Experience(s), Empathy(s), Communication(s) and Facilities(s), which all are found to have a positive effect on customer experience and on each other. The study developed two models that presented the determinants of Customer Experience at the East London Fresh Produce Market. The models should assist managers, organisational leaders and marketers to improve their customer experience-related strategies and to gain competitive advantage. The results and insights obtained, resulted in understanding the factors that provide good customer experience at the East London Fresh Produce Market. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Matyobeni, Akhona
- Date: 2021-12
- Subjects: Produce trade -- South Africa -- East London -- Marketing , Consumer satisfaction -- South Africa -- East London
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54069 , vital:46217
- Description: Fresh Produce Markets are an important sector in the agricultural value chain. The discussions on land expropriation, food security and job creation all demonstrate the potential that still exists within agriculture. The Fresh Produce Markets remain a solution to the distribution of food in South Africa and their existence remains relevant. Fresh Produce Markets in South Africa combined, generate about R15 billion, by distributing about 3 million tons of fresh produce. The main contributors to this success are the customers who are loyal to Fresh Produce Markets, regardless of distances these customers travel to get to Fresh Produce Markets. This study intends to understand how the East London Fresh Produce Market can put customer needs at the centre of their business, resulting in good Customer Experience. Positive customer experience promotes customer loyalty and assists organisations in encouraging brand advocacy. While customer experience has been explored in several contexts, regions and industries, customer experience at the East London Fresh Produce Market has not been measured. The literature review conducted investigated the field of customer experience. This literature review assisted in developing a conceptual model for customer experience for the East London Fresh Produce Market. This study follows a positivistic research approach, using quantitative methods of analysis. Exploratory factor analysis was conducted using data gathered from a questionnaire disseminated in hard copies and via e-mail. The sample of this study was selected at random using convenience and snowball sampling. A sample size of n = 210 was used in this study. Descriptive and inferential statistical analysis were conducted. The primary contribution of this study was the presentation and statistical assessment of an exploratory factor analysis of factors influencing customer experience at the East London Fresh Produce Market. This study found that the independent factors of Brand Experience, Service Experience and Post-purchase/Consumption Experience all have a positive effect on the overall customer experience and on each other. Furthermore, the statistical assessment suggested new factors of Product Quality and Range(s), Brand Experience(s), Empathy(s), Communication(s) and Facilities(s), which all are found to have a positive effect on customer experience and on each other. The study developed two models that presented the determinants of Customer Experience at the East London Fresh Produce Market. The models should assist managers, organisational leaders and marketers to improve their customer experience-related strategies and to gain competitive advantage. The results and insights obtained, resulted in understanding the factors that provide good customer experience at the East London Fresh Produce Market. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Customer experience value, satisfaction and behavioural intentions within selected shopping malls in Ghana
- Authors: Turkson, Patrick Joel
- Date: 2021-12
- Subjects: Shopping malls -- Ghana , Consumer satisfaction -- Ghana , Consumer behavior -- Ghana
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54706 , vital:47525
- Description: A key function of shopping malls is still to facilitate retail shopping experiences. Globally, shopping malls have assumed great importance in economies as they generate revenues to governments and contribute immensely to economic development, and Ghana is no exception to the benefits of shopping malls. As more shoppers shop in shopping malls, managers of malls are aggressively intensifying their marketing efforts in order to deliver value to customers, while taking into account contemporary changes in consumer preferences. Since the 1950s, customers have been seeking value through products and services, and now customers are seeking value through experiences. For several reasons such as customer preferences and lifestyles, the notion of creating experience value for customers has emerged as an important topic in contemporary marketing literature. The main interest of shopping mall managers is profit maximisation. However, shopping malls in Ghana are relatively new, face stiff competition from the informal retail sector, and are perceived as charging higher prices compared with the informal sector. Therefore, it is argued that providing positive customer experience value, prioritising customers’ satisfaction, and ensuring positive behavioural intentions can assist shopping mall managers in Ghana to be sustainable and remain competitive in the retail industry. The aim of this study is thus to investigate the factors that influence customer experience value, and assess the influence of customer experience value on customer satisfaction and behavioural intentions within selected shopping malls in Ghana. In addition, the study investigates the influence of customer satisfaction on behavioural intentions and the mediating role that customer satisfaction plays in the relationship between customer experience value and behavioural intentions. This study is expected to provide shopping mall managers in Ghana with information that might support them in their decision making concerning the shopping experience value activities that they offer to their customers. Three core concepts, namely customer experience value, customer satisfaction and behavioural intentions, formed the basis of this study. Also, the relationship between experience value, customer satisfaction, and behavioural intentions were examined. The study identified customer experience value as a multidimensional construct which comprises of four factors, namely service encounter (efficiency, service excellence and playfulness), experience realms (education, entertainment, escapism and esthetics), utilitarian value (monetary savings, selection and convenience) and hedonic value (exploration, place attachment and social status) as prospective factors contributing to customer experience value within the shopping mall context. Also, the study identified three attributional factors to measure customer satisfaction, namely the basic factors, performance factors, and excitement factors. Three outcomes of behavioural intentions, namely customer loyalty, word of mouth communication and revisit intentions were also identified to measure behavioural intentions of shoppers within the shopping mall context in Ghana. The study employed a purposive sampling technique to identify the potential respondents and the quantitative research methodology for analysis of the data of the study. Primary data was collected through a survey utilising self-administered structured questionnaires in the four key selected shopping malls in Ghana. Within the scope of the research, five hundred (500) useable questionnaires were received. The target population of the research included shoppers who have frequented the selected shopping malls in Ghana. The IBM SPSS (version 26) and AMOS computer software were used to perform the statistical analysis. The findings of the study showed a significant correlation between all factors (service encounter, experience realms, utilitarian value, hedonic value) measuring customer experience value (EV), customer satisfaction (CS) and behavioural intentions (BI). The empirical results also show that there is a significant relationship between experience value as an independent variable and customer satisfaction as a mediating variable. The results further revealed that experience value has a significant relationship with behavioural intentions. However, the results indicate that the relationship between the mediating variable (customer satisfaction) and the dependent variable (behavioural intentions) is insignificant. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Turkson, Patrick Joel
- Date: 2021-12
- Subjects: Shopping malls -- Ghana , Consumer satisfaction -- Ghana , Consumer behavior -- Ghana
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54706 , vital:47525
- Description: A key function of shopping malls is still to facilitate retail shopping experiences. Globally, shopping malls have assumed great importance in economies as they generate revenues to governments and contribute immensely to economic development, and Ghana is no exception to the benefits of shopping malls. As more shoppers shop in shopping malls, managers of malls are aggressively intensifying their marketing efforts in order to deliver value to customers, while taking into account contemporary changes in consumer preferences. Since the 1950s, customers have been seeking value through products and services, and now customers are seeking value through experiences. For several reasons such as customer preferences and lifestyles, the notion of creating experience value for customers has emerged as an important topic in contemporary marketing literature. The main interest of shopping mall managers is profit maximisation. However, shopping malls in Ghana are relatively new, face stiff competition from the informal retail sector, and are perceived as charging higher prices compared with the informal sector. Therefore, it is argued that providing positive customer experience value, prioritising customers’ satisfaction, and ensuring positive behavioural intentions can assist shopping mall managers in Ghana to be sustainable and remain competitive in the retail industry. The aim of this study is thus to investigate the factors that influence customer experience value, and assess the influence of customer experience value on customer satisfaction and behavioural intentions within selected shopping malls in Ghana. In addition, the study investigates the influence of customer satisfaction on behavioural intentions and the mediating role that customer satisfaction plays in the relationship between customer experience value and behavioural intentions. This study is expected to provide shopping mall managers in Ghana with information that might support them in their decision making concerning the shopping experience value activities that they offer to their customers. Three core concepts, namely customer experience value, customer satisfaction and behavioural intentions, formed the basis of this study. Also, the relationship between experience value, customer satisfaction, and behavioural intentions were examined. The study identified customer experience value as a multidimensional construct which comprises of four factors, namely service encounter (efficiency, service excellence and playfulness), experience realms (education, entertainment, escapism and esthetics), utilitarian value (monetary savings, selection and convenience) and hedonic value (exploration, place attachment and social status) as prospective factors contributing to customer experience value within the shopping mall context. Also, the study identified three attributional factors to measure customer satisfaction, namely the basic factors, performance factors, and excitement factors. Three outcomes of behavioural intentions, namely customer loyalty, word of mouth communication and revisit intentions were also identified to measure behavioural intentions of shoppers within the shopping mall context in Ghana. The study employed a purposive sampling technique to identify the potential respondents and the quantitative research methodology for analysis of the data of the study. Primary data was collected through a survey utilising self-administered structured questionnaires in the four key selected shopping malls in Ghana. Within the scope of the research, five hundred (500) useable questionnaires were received. The target population of the research included shoppers who have frequented the selected shopping malls in Ghana. The IBM SPSS (version 26) and AMOS computer software were used to perform the statistical analysis. The findings of the study showed a significant correlation between all factors (service encounter, experience realms, utilitarian value, hedonic value) measuring customer experience value (EV), customer satisfaction (CS) and behavioural intentions (BI). The empirical results also show that there is a significant relationship between experience value as an independent variable and customer satisfaction as a mediating variable. The results further revealed that experience value has a significant relationship with behavioural intentions. However, the results indicate that the relationship between the mediating variable (customer satisfaction) and the dependent variable (behavioural intentions) is insignificant. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Deconstructing the Challenges of COVID-19 on First-Year Rural University Students in South Africa
- Authors: Omodan, Bunmi Isaiah
- Date: 2021 -12
- Subjects: COVID-1 (Desease) College freshmen Article
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/7664 , vital:54733 , xlink:href="https://doi.org/10.51415/ajims.v3i1.930"
- Description: Assumptions and facts exist about the various challenges rural learners face when transitioning into university education in South Africa due to the pedagogical differences between secondary and university education. However, the advent of the COVID-19 pandemic compounded the transitioning challenges of students because most of the universities, especially the selected university, utilise online learning, which is alien to first-year students who are transitioning from rural high schools to the university. This study explores the challenges and solutions associated with first-year students transitioning to a new level of education during the COVID-19 pandemic. An asset-based approach was used to theorise the study within the Transformative Paradigm (TP), while Participatory Research (PR) was used to design the study. These are relevant because both TP and PR are targeted towards transforming people’s predicaments. The participants consisted of ten first-year students selected using a convenient sampling technique. Data was collected using electronic interviews such as email, WhatsApp messages, and phone calls. The data were analysed using thematic analysis. The study revealed that first-year rural university students’ inability to use online learning tools effectively and unstable internet connections in the rural community are major challenges. The study, therefore, concludes that the provision of internet access and students’ readiness for adaptability are the possible solutions. Keywords: COVID-19; first-year students; rural communities; rural university
- Full Text:
- Date Issued: 2021 -12
- Authors: Omodan, Bunmi Isaiah
- Date: 2021 -12
- Subjects: COVID-1 (Desease) College freshmen Article
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/7664 , vital:54733 , xlink:href="https://doi.org/10.51415/ajims.v3i1.930"
- Description: Assumptions and facts exist about the various challenges rural learners face when transitioning into university education in South Africa due to the pedagogical differences between secondary and university education. However, the advent of the COVID-19 pandemic compounded the transitioning challenges of students because most of the universities, especially the selected university, utilise online learning, which is alien to first-year students who are transitioning from rural high schools to the university. This study explores the challenges and solutions associated with first-year students transitioning to a new level of education during the COVID-19 pandemic. An asset-based approach was used to theorise the study within the Transformative Paradigm (TP), while Participatory Research (PR) was used to design the study. These are relevant because both TP and PR are targeted towards transforming people’s predicaments. The participants consisted of ten first-year students selected using a convenient sampling technique. Data was collected using electronic interviews such as email, WhatsApp messages, and phone calls. The data were analysed using thematic analysis. The study revealed that first-year rural university students’ inability to use online learning tools effectively and unstable internet connections in the rural community are major challenges. The study, therefore, concludes that the provision of internet access and students’ readiness for adaptability are the possible solutions. Keywords: COVID-19; first-year students; rural communities; rural university
- Full Text:
- Date Issued: 2021 -12
Demarcation of municipalities and service delivery capacity: a case of selected eastern cape municipalities
- Authors: Sokopo, Johannes
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54574 , vital:46715
- Description: The study examines the relationship between demarcation of municipal boundaries and the capacity of a municipality to deliver services. The case of the amalgamation of Baviaans, Camdeboo, and Ikwezi local municipalities which has led to the establishment of the Dr Beyers Naudè Municipality in the Sara Baartman District Municipality in the Eastern Cape has been used to determine this relationship in this study. The amalgamation of these municipalities has led to the redetermination and dismantling of their boundaries and the establishment of the boundaries of the newly created and larger Dr Beyers Naudè Local Municipality. The study investigated whether the demarcation of municipal boundaries has, in this instance, enhanced the capacity of the municipality to deliver basic services. Organisational Theory was used to interpret the amalgamation of municipalities. This theory was used for the theoretical basis of organisational structure and highlighting the need for the alignment of organizational structure with the municipalities’ mandate, of effective and efficient service delivery. The study adopted a qualitative research method and employed a non-probability purposive sampling technique to select participants. Interviews were used for data collection. 38 participants were interviewed, namely 7 councillors, 5 municipal officials, 5 members of the ratepayers’ association and 21 members of the community. Mixed views were expressed by participants regarding the enhancement of the state on basic service delivery after the merger of the three local municipalities. Furthermore, the study did not find evidence of a feasibility study prior to the implementation of the amalgamation process. Subsequently, the study could not find conclusive evidence relating to the enhancement of the capacity of the municipality to deliver services after the redetermination of municipal boundaries. The study recommends, among others, that the demarcation of municipal boundaries should be preceded by an appropriate feasibility study and be done such that there is compliance with the relevant legislation, and it must also have an effective public participation. The study also recommends that the newly established Dr Beyers Naudè Local Municipality should focus on maintaining the service delivery infrastructure it has inherited from the merger of its three predecessor municipalities, enhance public participation in its programmes, and priorities community beneficiation as a critical aspect of its service delivery mandate. , Thesis (PhD) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Sokopo, Johannes
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54574 , vital:46715
- Description: The study examines the relationship between demarcation of municipal boundaries and the capacity of a municipality to deliver services. The case of the amalgamation of Baviaans, Camdeboo, and Ikwezi local municipalities which has led to the establishment of the Dr Beyers Naudè Municipality in the Sara Baartman District Municipality in the Eastern Cape has been used to determine this relationship in this study. The amalgamation of these municipalities has led to the redetermination and dismantling of their boundaries and the establishment of the boundaries of the newly created and larger Dr Beyers Naudè Local Municipality. The study investigated whether the demarcation of municipal boundaries has, in this instance, enhanced the capacity of the municipality to deliver basic services. Organisational Theory was used to interpret the amalgamation of municipalities. This theory was used for the theoretical basis of organisational structure and highlighting the need for the alignment of organizational structure with the municipalities’ mandate, of effective and efficient service delivery. The study adopted a qualitative research method and employed a non-probability purposive sampling technique to select participants. Interviews were used for data collection. 38 participants were interviewed, namely 7 councillors, 5 municipal officials, 5 members of the ratepayers’ association and 21 members of the community. Mixed views were expressed by participants regarding the enhancement of the state on basic service delivery after the merger of the three local municipalities. Furthermore, the study did not find evidence of a feasibility study prior to the implementation of the amalgamation process. Subsequently, the study could not find conclusive evidence relating to the enhancement of the capacity of the municipality to deliver services after the redetermination of municipal boundaries. The study recommends, among others, that the demarcation of municipal boundaries should be preceded by an appropriate feasibility study and be done such that there is compliance with the relevant legislation, and it must also have an effective public participation. The study also recommends that the newly established Dr Beyers Naudè Local Municipality should focus on maintaining the service delivery infrastructure it has inherited from the merger of its three predecessor municipalities, enhance public participation in its programmes, and priorities community beneficiation as a critical aspect of its service delivery mandate. , Thesis (PhD) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Dualistic role of the Employee Relations Office and its influence on labour relations at the University of Fort Hare
- Authors: Mnqayi, Leon M
- Date: 2021-12
- Subjects: Industrial relations--South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/23416 , vital:57729
- Description: Employee relations are important for the success of any organisation. Maintaining healthy cordial employee relations usually involves creating understanding and harmony between the employees and the employer. However, due to several dynamics within the work environment, employee relations become complex. The employee relations unit in the human resources management department is tasked with handling this complex situation by dealing with different grievances in organisations. In this regard, in organisations like the University of Fort Hare, the employee relations office represents both the employees and employer. The dualistic role assumed by the employee relations office is associated with several challenges, such as employees not trusting the employee relations office. The employee relations office is deemed to be safeguarding the interests of the management, which complicates employee relations at the university. Therefore, this study sought to explore perceptions on the dualistic role of the employee relations office and its influence on labour relations at the University of Fort Hare. The study utilised a qualitative research methodology to find out perceptions of participants on the dualistic role of the employee relations office and its influence on labour relations at the University of Fort Hare. The research used semi-structured interviews to collect data. The participants were purposively selected from the University of Fort Hare. The Human Relations Theory was used as the main theory, and it provided underpinning arguments regarding employee relations at the University of Fort Hare. The data gathered were thematically analysed. The main findings revealed that there are fragmented employee relations at the university, mainly due to lack of clarity about the standard working conditions that should be expected and that are acceptable by the university. Furthermore, the study also established that the employee relations office is largely seen as biased against employees and seems to favour employers most of the times, leading to disputes being taken to an external party. Based on these findings, the study recommends that to improve objectivity, the employee relations office can create an oversight team that independently provides insights on specific issues faced by employees and management. Improving objectivity should include making decisions based on facts or data, focusing on the vision and mission of the institution, increasing the ratio of positive against negative feedback, improving on transparency during decision-making and the creation of an anonymous human resources engagement system. , Thesis (MPA) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mnqayi, Leon M
- Date: 2021-12
- Subjects: Industrial relations--South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/23416 , vital:57729
- Description: Employee relations are important for the success of any organisation. Maintaining healthy cordial employee relations usually involves creating understanding and harmony between the employees and the employer. However, due to several dynamics within the work environment, employee relations become complex. The employee relations unit in the human resources management department is tasked with handling this complex situation by dealing with different grievances in organisations. In this regard, in organisations like the University of Fort Hare, the employee relations office represents both the employees and employer. The dualistic role assumed by the employee relations office is associated with several challenges, such as employees not trusting the employee relations office. The employee relations office is deemed to be safeguarding the interests of the management, which complicates employee relations at the university. Therefore, this study sought to explore perceptions on the dualistic role of the employee relations office and its influence on labour relations at the University of Fort Hare. The study utilised a qualitative research methodology to find out perceptions of participants on the dualistic role of the employee relations office and its influence on labour relations at the University of Fort Hare. The research used semi-structured interviews to collect data. The participants were purposively selected from the University of Fort Hare. The Human Relations Theory was used as the main theory, and it provided underpinning arguments regarding employee relations at the University of Fort Hare. The data gathered were thematically analysed. The main findings revealed that there are fragmented employee relations at the university, mainly due to lack of clarity about the standard working conditions that should be expected and that are acceptable by the university. Furthermore, the study also established that the employee relations office is largely seen as biased against employees and seems to favour employers most of the times, leading to disputes being taken to an external party. Based on these findings, the study recommends that to improve objectivity, the employee relations office can create an oversight team that independently provides insights on specific issues faced by employees and management. Improving objectivity should include making decisions based on facts or data, focusing on the vision and mission of the institution, increasing the ratio of positive against negative feedback, improving on transparency during decision-making and the creation of an anonymous human resources engagement system. , Thesis (MPA) -- Faculty of Management and Commerce, 2021
- Full Text:
- Date Issued: 2021-12
Effect of coal and microalgae biomass co-firing on CO2, SO2 and NOx emissions: An experimental evaluation
- Authors: Magida, Nokuthula Ethel
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53817 , vital:45984
- Description: There is increasingly stringent legislation on the environmental impact of energy production from coal combustion, and this has led to growing pressure to reduce the emission of greenhouse gases (GHGs). Thus, there is a significant need to develop and implement clean coal combustion technologies that would reduce the environmental gas pollutants. For power generation, the co-firing of biomass fuels at conventional coal-fired power stations is recognised as one of the low-cost, low-risk options to achieve significant reductions in GHG emissions. When coal is co-utilized with biomass there is added attractiveness because the biomass is CO2 neutral, and there is interest in using waste biomass and microalgae. Thus, the co-combustion of coal and biomass for energy production results in pollutant reduction, especially in the emissions of NOx, SOx, volatile organic compounds and polyaromatic hydrocarbons. The synergistic activity observed for toxic organic emissions is not well understood and is thought to involve chemical interaction between the volatiles from each fuel coupled with possible catalytic activity from the inorganic constituents of the fuels. The characterization of co-firing products and gases emitted from coal and microalgae (particularly the Scenedesmus strain) co-combustion has received limited attention. Therefore, this study seeks to understand possible interactions occurring during co-combustion of coal and Scenedesmus microalgae (Coalgae®). Additionally, the study aims to determine the effect of co-firing coal and Scenedesmus microalgae on CO2, SO2 and NOx emissions. The term “Coalgae®” refers to the mixture of coal and microalgae biomass. The study looks at physico-thermal characteristics as well as CO2, SO2 and NOx emissions of various coal-microalgae blending ratios by mass; 100:0 (coal), 95:5 (Coalgae® 5%), 90:10 (Coalgae® 10%), 85:15 (Coalgae® 15%) and 80:20 (Coalgae® 20%). Characterization techniques carried out included proximate and ultimate analyses, Fourier-transform infrared (FT-IR) and Scanning electron microscopy and X-ray energy dispersive spectroscopy (SEM/EDS). For combustion studies two techniques were applied. Low heating rate was obtained through a Thermogravimetric-Mass spectrometer analysis (TG-MS). Other combustion experiments were performed on the five lumpy fuels (coal and Coalgae® 5% - 20%) exposed to the flame in a fixed-bed combustion reactor. The emission concentrations of CO2 (%), NOx (ppm) and SO2 (ppm) of coal and Coalgae® blends were measured during the combustion of the five materials using a Lancom 4 portable flue gas analyser. The mass reduction (g) and temperature (°C) at the reactor exit were recorded during the combustion tests to compare the combustion behaviour of the four mixtures to that of raw coal. TG-DTG curves of coal and microalgae confirmed that the combustion behaviour of these materials was different. Coal showed one reaction during the combustion process, while microalgae and the Coalgae® blends showed three reactions. A significant reduction in activation energies of 160.4 kJ/mol, 159.6 kJ/mol, 151.3 kJ/mol, and 134.2 kJ/mol for Coalgae® 5% - Coalgae® 20%, respectively, compared to coal (161.3 kJ/mol) was achieved. The lowering of activation energy could be attributed to the relative fixed carbon content. SEM morphology images of ash obtained from the combustion of coal and Coalgae® 5% - 20% confirmed changes in devolatilization and combustion behaviour of solid raw fuel. The ash of Coalgae® blends had higher fluxing elements (Fe, Ca, K and Mg) than coal and this shows possibility of slagging and fouling in combustion systems. The Coalgae® blends showed a synergistic effect due to different combustion characteristics of coal and Scenedesmus microalgae. The combustion results obtained from the fixed-bed reactor showed significant reductions in concentrations of CO2, SO2 and NOx emissions for Coalgae® blends compared to baseline coal. Microalgae reduced CO2 emissions from baseline coal by 14.9%, 19.5%, 23.5% and 31.4% for Coalgae® 5%, 10%, 15% and 20%, respectively. SO2 reductions of 1.9%, 10.6%, 15.8% and 18.2%, and NOx reductions of 22.4%, 26.1%, 24.4% and 16.9% were achieved with Coalgae® 5%, 10%, 15% and 20%, respectively. Moreover, the combustion efficiency of Coalgae® blends increased significantly by up to 14.5% from baseline coal (86.4%) to Coalgae® 20% (98.9%). Based on the above findings, the co-firing of coal and Scenedesmus microalgae biomass was necessary for the reduction of CO2, SO2, and NOx emissions. As such, Coalgae® blends can be considered as alternative fuels in any coal driven process for energy generation. , Thesis (MSc) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Magida, Nokuthula Ethel
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53817 , vital:45984
- Description: There is increasingly stringent legislation on the environmental impact of energy production from coal combustion, and this has led to growing pressure to reduce the emission of greenhouse gases (GHGs). Thus, there is a significant need to develop and implement clean coal combustion technologies that would reduce the environmental gas pollutants. For power generation, the co-firing of biomass fuels at conventional coal-fired power stations is recognised as one of the low-cost, low-risk options to achieve significant reductions in GHG emissions. When coal is co-utilized with biomass there is added attractiveness because the biomass is CO2 neutral, and there is interest in using waste biomass and microalgae. Thus, the co-combustion of coal and biomass for energy production results in pollutant reduction, especially in the emissions of NOx, SOx, volatile organic compounds and polyaromatic hydrocarbons. The synergistic activity observed for toxic organic emissions is not well understood and is thought to involve chemical interaction between the volatiles from each fuel coupled with possible catalytic activity from the inorganic constituents of the fuels. The characterization of co-firing products and gases emitted from coal and microalgae (particularly the Scenedesmus strain) co-combustion has received limited attention. Therefore, this study seeks to understand possible interactions occurring during co-combustion of coal and Scenedesmus microalgae (Coalgae®). Additionally, the study aims to determine the effect of co-firing coal and Scenedesmus microalgae on CO2, SO2 and NOx emissions. The term “Coalgae®” refers to the mixture of coal and microalgae biomass. The study looks at physico-thermal characteristics as well as CO2, SO2 and NOx emissions of various coal-microalgae blending ratios by mass; 100:0 (coal), 95:5 (Coalgae® 5%), 90:10 (Coalgae® 10%), 85:15 (Coalgae® 15%) and 80:20 (Coalgae® 20%). Characterization techniques carried out included proximate and ultimate analyses, Fourier-transform infrared (FT-IR) and Scanning electron microscopy and X-ray energy dispersive spectroscopy (SEM/EDS). For combustion studies two techniques were applied. Low heating rate was obtained through a Thermogravimetric-Mass spectrometer analysis (TG-MS). Other combustion experiments were performed on the five lumpy fuels (coal and Coalgae® 5% - 20%) exposed to the flame in a fixed-bed combustion reactor. The emission concentrations of CO2 (%), NOx (ppm) and SO2 (ppm) of coal and Coalgae® blends were measured during the combustion of the five materials using a Lancom 4 portable flue gas analyser. The mass reduction (g) and temperature (°C) at the reactor exit were recorded during the combustion tests to compare the combustion behaviour of the four mixtures to that of raw coal. TG-DTG curves of coal and microalgae confirmed that the combustion behaviour of these materials was different. Coal showed one reaction during the combustion process, while microalgae and the Coalgae® blends showed three reactions. A significant reduction in activation energies of 160.4 kJ/mol, 159.6 kJ/mol, 151.3 kJ/mol, and 134.2 kJ/mol for Coalgae® 5% - Coalgae® 20%, respectively, compared to coal (161.3 kJ/mol) was achieved. The lowering of activation energy could be attributed to the relative fixed carbon content. SEM morphology images of ash obtained from the combustion of coal and Coalgae® 5% - 20% confirmed changes in devolatilization and combustion behaviour of solid raw fuel. The ash of Coalgae® blends had higher fluxing elements (Fe, Ca, K and Mg) than coal and this shows possibility of slagging and fouling in combustion systems. The Coalgae® blends showed a synergistic effect due to different combustion characteristics of coal and Scenedesmus microalgae. The combustion results obtained from the fixed-bed reactor showed significant reductions in concentrations of CO2, SO2 and NOx emissions for Coalgae® blends compared to baseline coal. Microalgae reduced CO2 emissions from baseline coal by 14.9%, 19.5%, 23.5% and 31.4% for Coalgae® 5%, 10%, 15% and 20%, respectively. SO2 reductions of 1.9%, 10.6%, 15.8% and 18.2%, and NOx reductions of 22.4%, 26.1%, 24.4% and 16.9% were achieved with Coalgae® 5%, 10%, 15% and 20%, respectively. Moreover, the combustion efficiency of Coalgae® blends increased significantly by up to 14.5% from baseline coal (86.4%) to Coalgae® 20% (98.9%). Based on the above findings, the co-firing of coal and Scenedesmus microalgae biomass was necessary for the reduction of CO2, SO2, and NOx emissions. As such, Coalgae® blends can be considered as alternative fuels in any coal driven process for energy generation. , Thesis (MSc) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text:
- Date Issued: 2021-12