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
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
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
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 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
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
Emerging Job Categories and Competencies Informing Talent Strategies for Industry 4.0 Automotive Organisations
- Authors: Macpherson, Wayne Elvison
- Date: 2021-12
- Subjects: Automobile industry and trade , Automobiles -- Technological innovations -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54002 , vital:46174
- Description: The emergence of Industry 4.0 is impacting the world of work and brings along new job categories that require new competency sets. The global shortage of skills is aggravated by the emergence of Industry 4.0 which is set to perpetuate the war for talent with talent being a main driver of business success. The South African automotive industry, being the largest contributor to the country’s GDP and the second largest employer in the country, needed to effectively manage talent to stay relevant and survive in a highly competitive labour market. Given the above, this research investigated emerging job categories and competencies required by automotive organisations for informing Talent Strategies in the context of Industry 4.0. To attain the purpose of the study, a literature study was conducted that explored the evolution of industry and the nature of Industry 4.0 with its associate technologies. A main part of the literature study was dedicated to identifying emerging job categories and competencies associated with Industry 4.0, with specific emphasis on identifying a hybrid competency set. The literature study was supplemented by data mining, semi-structured interviews and an online survey which, in turn, ensured a triangulation approach. Firstly, data mining was employed by consulting scientific and web-based sources to uncover trends in job advertisements relating to emerging job categories and competencies required in Industry 4.0 automotive organisations. Secondly, 30 semi-structured interviews were conducted with experts in the fields of HRM, production and engineering in automotive organisations, to gather their thoughts and views on the extent to which their organisations experienced Industry 4.0, and the influence of Industry 4.0 on both job losses and job creation, competencies employees required and Talent Strategies adopted to ensure the supply of relevant talent. The results from the interviews were qualitatively analysed with the extraction of themes. Lastly, a self-administered online survey was administered to HRM professionals, line-managers, and production professionals in automotive organisations through snowball sampling with 162 usable questionnaires returned. Factor analysis and Cronbach alpha coefficient were utilised to successfully validate the scales used in the study, with technical skills revealing two distinct factors, and Talent Strategies revealing three distinct factors. The results provided evidence of technical, conceptual, human and personal skills required by automotive organisations in the context of Industry 4.0. A high level of differing responses was noted for Talent Strategies, and specially for retention strategies. Based on the results obtained in the study, recommendations were made for informing talent in the South African automotive sector. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Macpherson, Wayne Elvison
- Date: 2021-12
- Subjects: Automobile industry and trade , Automobiles -- Technological innovations -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54002 , vital:46174
- Description: The emergence of Industry 4.0 is impacting the world of work and brings along new job categories that require new competency sets. The global shortage of skills is aggravated by the emergence of Industry 4.0 which is set to perpetuate the war for talent with talent being a main driver of business success. The South African automotive industry, being the largest contributor to the country’s GDP and the second largest employer in the country, needed to effectively manage talent to stay relevant and survive in a highly competitive labour market. Given the above, this research investigated emerging job categories and competencies required by automotive organisations for informing Talent Strategies in the context of Industry 4.0. To attain the purpose of the study, a literature study was conducted that explored the evolution of industry and the nature of Industry 4.0 with its associate technologies. A main part of the literature study was dedicated to identifying emerging job categories and competencies associated with Industry 4.0, with specific emphasis on identifying a hybrid competency set. The literature study was supplemented by data mining, semi-structured interviews and an online survey which, in turn, ensured a triangulation approach. Firstly, data mining was employed by consulting scientific and web-based sources to uncover trends in job advertisements relating to emerging job categories and competencies required in Industry 4.0 automotive organisations. Secondly, 30 semi-structured interviews were conducted with experts in the fields of HRM, production and engineering in automotive organisations, to gather their thoughts and views on the extent to which their organisations experienced Industry 4.0, and the influence of Industry 4.0 on both job losses and job creation, competencies employees required and Talent Strategies adopted to ensure the supply of relevant talent. The results from the interviews were qualitatively analysed with the extraction of themes. Lastly, a self-administered online survey was administered to HRM professionals, line-managers, and production professionals in automotive organisations through snowball sampling with 162 usable questionnaires returned. Factor analysis and Cronbach alpha coefficient were utilised to successfully validate the scales used in the study, with technical skills revealing two distinct factors, and Talent Strategies revealing three distinct factors. The results provided evidence of technical, conceptual, human and personal skills required by automotive organisations in the context of Industry 4.0. A high level of differing responses was noted for Talent Strategies, and specially for retention strategies. Based on the results obtained in the study, recommendations were made for informing talent in the South African automotive sector. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Emotional Intelligence as a strategy to enhance leadership
- Authors: Knight, Melody
- Date: 2021-12
- Subjects: Emotional intelligence -- South Africa -- Leadership , Development leadership -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53980 , vital:46166
- Description: The elevated levels of burnout and stress that arise from work-related challenges, occurring from poor public health infrastructure, are prevalent in developing countries such as South Africa. Emotional intelligence (EI) theory offers a means to understand behaviour, attitudes, and interpersonal skills, which are important for nursing managers (NMs) to facilitate personal and professional development, well-being, and improved quality of care. Researchers have called for more research to create a greater awareness and understanding of EI in nursing leadership. Critical Realism was used as the epistemological framework to meet the objectives of the study. The aim was to identify practical recommendations for interventions that could enhance the ability of NMs to manage the challenges associated with leadership. Using an explanatory framework, the objectives were to (i) generate causal explanations for organisational phenomena, given the EI of NMs and the conditions of its exercise, (ii) describe how NMs use their EI abilities in challenging situations, and to (iii) identify interventions to develop the EI of NMs. Although the research on EI is extensive, research on NMs and interventions to develop EI in NMs was not found. Purposive sampling was employed with focus groups and individual semi-structured interviews used to gather data. The data was analysed using thematic data analysis and retroduction to identify the most logically compelling explanation for events. The findings showed that the EI of NMs is essentially related to work engagement, burnout, turnover intention, work satisfaction, communication, interpersonal relationships, and job performance. It showed that organisational support and policies, personal and psychological factors, as well as training, play a necessary role in enhancing the EI of NMs. The recommendations provide suggestions to create the conditions necessary to enhance the EI of NMs. , Thesis (DPhil) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Knight, Melody
- Date: 2021-12
- Subjects: Emotional intelligence -- South Africa -- Leadership , Development leadership -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53980 , vital:46166
- Description: The elevated levels of burnout and stress that arise from work-related challenges, occurring from poor public health infrastructure, are prevalent in developing countries such as South Africa. Emotional intelligence (EI) theory offers a means to understand behaviour, attitudes, and interpersonal skills, which are important for nursing managers (NMs) to facilitate personal and professional development, well-being, and improved quality of care. Researchers have called for more research to create a greater awareness and understanding of EI in nursing leadership. Critical Realism was used as the epistemological framework to meet the objectives of the study. The aim was to identify practical recommendations for interventions that could enhance the ability of NMs to manage the challenges associated with leadership. Using an explanatory framework, the objectives were to (i) generate causal explanations for organisational phenomena, given the EI of NMs and the conditions of its exercise, (ii) describe how NMs use their EI abilities in challenging situations, and to (iii) identify interventions to develop the EI of NMs. Although the research on EI is extensive, research on NMs and interventions to develop EI in NMs was not found. Purposive sampling was employed with focus groups and individual semi-structured interviews used to gather data. The data was analysed using thematic data analysis and retroduction to identify the most logically compelling explanation for events. The findings showed that the EI of NMs is essentially related to work engagement, burnout, turnover intention, work satisfaction, communication, interpersonal relationships, and job performance. It showed that organisational support and policies, personal and psychological factors, as well as training, play a necessary role in enhancing the EI of NMs. The recommendations provide suggestions to create the conditions necessary to enhance the EI of NMs. , Thesis (DPhil) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Foraging ecology of Kelp Gulls in natural and anthropogenically modified environments
- Authors: Reusch, Katharina
- 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/10948/54106 , vital:46303
- Description: Humans are having a profound impact on the natural environment through a myriad of activities, such as land use change or direct exploitation of resources. Some species are able to adapt to these changes and thrive in deeply modified environments. They are often considered winners of global change. Among these are Kelp GullsLarus dominicanus in South Africa, which have a generalist foraging nature. Despite their abundance and potential role in the ecosystem, knowledge on their foraging ecology is limited, with no understanding of the role of natural and anthropogenic food resources during breeding. The aim of this thesis was to assess the foraging movements, diet and health of Kelp Gulls breeding in seven different colonies varying in proximity to landfills. GPS loggers were deployed on incubating adults to assess foraging trip patterns, effort, and habitats. Diet and trophic ecology of adults and chicks was determined during the breeding season by combining conventional diet analysis (i.e. stomach content samples and regurgitated pellets) with stable isotope analysis of blood plasma. Finally, population health was estimated using indices of body condition for adults and chicks, and blood and faecal parasites were examined. The first successful tracking data from Kelp Gulls in South Africa revealed that birds from all colonies spent more time foraging in natural environments (marine, coastal and terrestrial) than in anthropogenically modified ones, irrelevant of the distance to the nearest landfill, potentially reflecting prey profitability or availability around thebreeding colonies. Gulls also had higher foraging effort when foraging at sea (longer travelling distance), which might be balanced by foraging on high energy prey in themarine environment (e.g. fish). Diet and trophic ecology data confirmed the wide range of resources Kelp Gulls were capable of exploiting. Anthropogenic items were important food sources at some colonies, while annual differences in trophic level targeted were apparent at some other colonies, possibly reflecting varying predation levels on other seabirds. Diet and trophic ecology generally differed between adults and chicks, with chicks being fed a more marine, i.e. fish, and higher trophic level diet, potentially due to the higher energy content of fish being important for chick growth. Despite differences between colonies in foraging effort and diet, body condition of both adults and chicks was similar across colonies. Birds from one of the urban colonies, foraging at the local landfill, tended to have slightly higher body condition values, possibly due to the high fat content of anthropogenic items, although this was not significant. Blood parasites were very scarce, with only one genus identified, Haemoproteus spp. Parasite abundance was significantly lower in chicks than in adults, implicating that adults might get infected in areas outside the colony. Faecal smears revealed the presence of yeast cells (Candida spp.) in birds, coinciding with higher body condition values, possibly linked to foraging habitat choice, as birds might ingest yeast cells when feeding in urban areas contaminated with human excrement.Kelp Gulls breeding in South Africa forage on a wide variety of resources and habitats, with limited apparent impact on their parasite load and body condition. All colonies foraged to some extend on natural sources, although some colonies located in very urban areas seemed to depend more closely on anthropogenic items as food resource. Therefore, changes in e.g. landfill management might cause changes in population dynamics, with possible repercussions on neighbouring bird populations. Theirgeneralist foraging nature, among others, makes Kelp Gulls winners of global change and is partly responsible for their increased population numbers. As they are often perceived as pests, information on the foraging ecology is important to manage gull populations effectively. , Thesis (PhD) -- Faculty of Sciences, School of Environmental Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Reusch, Katharina
- 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/10948/54106 , vital:46303
- Description: Humans are having a profound impact on the natural environment through a myriad of activities, such as land use change or direct exploitation of resources. Some species are able to adapt to these changes and thrive in deeply modified environments. They are often considered winners of global change. Among these are Kelp GullsLarus dominicanus in South Africa, which have a generalist foraging nature. Despite their abundance and potential role in the ecosystem, knowledge on their foraging ecology is limited, with no understanding of the role of natural and anthropogenic food resources during breeding. The aim of this thesis was to assess the foraging movements, diet and health of Kelp Gulls breeding in seven different colonies varying in proximity to landfills. GPS loggers were deployed on incubating adults to assess foraging trip patterns, effort, and habitats. Diet and trophic ecology of adults and chicks was determined during the breeding season by combining conventional diet analysis (i.e. stomach content samples and regurgitated pellets) with stable isotope analysis of blood plasma. Finally, population health was estimated using indices of body condition for adults and chicks, and blood and faecal parasites were examined. The first successful tracking data from Kelp Gulls in South Africa revealed that birds from all colonies spent more time foraging in natural environments (marine, coastal and terrestrial) than in anthropogenically modified ones, irrelevant of the distance to the nearest landfill, potentially reflecting prey profitability or availability around thebreeding colonies. Gulls also had higher foraging effort when foraging at sea (longer travelling distance), which might be balanced by foraging on high energy prey in themarine environment (e.g. fish). Diet and trophic ecology data confirmed the wide range of resources Kelp Gulls were capable of exploiting. Anthropogenic items were important food sources at some colonies, while annual differences in trophic level targeted were apparent at some other colonies, possibly reflecting varying predation levels on other seabirds. Diet and trophic ecology generally differed between adults and chicks, with chicks being fed a more marine, i.e. fish, and higher trophic level diet, potentially due to the higher energy content of fish being important for chick growth. Despite differences between colonies in foraging effort and diet, body condition of both adults and chicks was similar across colonies. Birds from one of the urban colonies, foraging at the local landfill, tended to have slightly higher body condition values, possibly due to the high fat content of anthropogenic items, although this was not significant. Blood parasites were very scarce, with only one genus identified, Haemoproteus spp. Parasite abundance was significantly lower in chicks than in adults, implicating that adults might get infected in areas outside the colony. Faecal smears revealed the presence of yeast cells (Candida spp.) in birds, coinciding with higher body condition values, possibly linked to foraging habitat choice, as birds might ingest yeast cells when feeding in urban areas contaminated with human excrement.Kelp Gulls breeding in South Africa forage on a wide variety of resources and habitats, with limited apparent impact on their parasite load and body condition. All colonies foraged to some extend on natural sources, although some colonies located in very urban areas seemed to depend more closely on anthropogenic items as food resource. Therefore, changes in e.g. landfill management might cause changes in population dynamics, with possible repercussions on neighbouring bird populations. Theirgeneralist foraging nature, among others, makes Kelp Gulls winners of global change and is partly responsible for their increased population numbers. As they are often perceived as pests, information on the foraging ecology is important to manage gull populations effectively. , Thesis (PhD) -- Faculty of Sciences, School of Environmental Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Inbound tourist experience in south africa
- Authors: Twumasi, Gabriel Kwadwo
- Date: 2021-12
- Subjects: Tourism -- Economic aspects -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54641 , vital:46877
- Description: The tourism industry contributes significantly to the economic growth of South Africa. Although international tourism is noted for a great contribution to customer experience beyond their borders, few studies exist in respect of tourist experience in South Africa. An individual experience to a tourism destination impact on his/her satisfaction and behavioural intentions. Tourist experience has been identified as a possible strategy for building and improving the relationship between tourism businesses and their clients in order to improve customer retention and recommending and revisiting of destination. Thus, the primary objective of this study was to identify, investigate and empirically test the factors influencing customer (inbound tourists) experience in South Africa. The study also seeks to determine how these experiences influence customer satisfaction, recommendation of the destination and the likelihood of a return visit. Tourist experience is of performance value to tourism businesses as these businesses need to identify the factors they should focus on to increase the value of products and services they are delivering to their customers. A quantitative methodology was chosen for this study and data was collected through a self-administered questionnaire. The study population included all inbound tourist who had visited South Africa between the years 2018 and 2020. The research design consisted of causal and descriptive research. The study followed a quantitative research method to obtain the set objectives of the study. A measuring instrument in the form of a structured questionnaire was designed from secondary sources to source for the needed data. A web-based online questionnaire and convenience sampling technique was chosen to identify inbound tourist to South Africa. Of the 320 inbound tourists to South Africa reached and completed the questionnaire, 319 were included in the analysis. Both descriptive and inferential statistics were employed in the data analysis. The main empirical results of the study found that statistically significant relationships exist between the independent variables: Quality accommodation, Tidiness of attractions, Ancillary services, Safety of destination, Convenience retention, Quality of attractions, Transport and the dependent variables, Customer satisfaction and Recommending and revisiting of destination. The outcome of the results of the structural equation modelling revealed an acceptable model fit of the study. The results suggest that customer satisfaction, recommending and revisiting of destination are of strategic importance in promoting tourism destinations for inbound tourists. It is imperative to provide memorable experiences to tourist. Tourism destinations must always provide an excellent service in order to enhance efficient competitive services to their customers. Furthermore, it is recommended that tourism business provide products and services that will cater for the needs of inbound tourists based on the specific factors influencing customer satisfaction and the recommendation and revisiting of destinations. This study makes a significant contribution to the body of knowledge and practitioners as it has established the factors influencing inbound tourists’ experience and, how these factors influence customer satisfaction, recommending and revisiting of international tourists to South Africa. Furthermore, the study presents recommendations and practical strategies that could help tourism businesses improve inbound tourists’ experiences in South Africa. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Twumasi, Gabriel Kwadwo
- Date: 2021-12
- Subjects: Tourism -- Economic aspects -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54641 , vital:46877
- Description: The tourism industry contributes significantly to the economic growth of South Africa. Although international tourism is noted for a great contribution to customer experience beyond their borders, few studies exist in respect of tourist experience in South Africa. An individual experience to a tourism destination impact on his/her satisfaction and behavioural intentions. Tourist experience has been identified as a possible strategy for building and improving the relationship between tourism businesses and their clients in order to improve customer retention and recommending and revisiting of destination. Thus, the primary objective of this study was to identify, investigate and empirically test the factors influencing customer (inbound tourists) experience in South Africa. The study also seeks to determine how these experiences influence customer satisfaction, recommendation of the destination and the likelihood of a return visit. Tourist experience is of performance value to tourism businesses as these businesses need to identify the factors they should focus on to increase the value of products and services they are delivering to their customers. A quantitative methodology was chosen for this study and data was collected through a self-administered questionnaire. The study population included all inbound tourist who had visited South Africa between the years 2018 and 2020. The research design consisted of causal and descriptive research. The study followed a quantitative research method to obtain the set objectives of the study. A measuring instrument in the form of a structured questionnaire was designed from secondary sources to source for the needed data. A web-based online questionnaire and convenience sampling technique was chosen to identify inbound tourist to South Africa. Of the 320 inbound tourists to South Africa reached and completed the questionnaire, 319 were included in the analysis. Both descriptive and inferential statistics were employed in the data analysis. The main empirical results of the study found that statistically significant relationships exist between the independent variables: Quality accommodation, Tidiness of attractions, Ancillary services, Safety of destination, Convenience retention, Quality of attractions, Transport and the dependent variables, Customer satisfaction and Recommending and revisiting of destination. The outcome of the results of the structural equation modelling revealed an acceptable model fit of the study. The results suggest that customer satisfaction, recommending and revisiting of destination are of strategic importance in promoting tourism destinations for inbound tourists. It is imperative to provide memorable experiences to tourist. Tourism destinations must always provide an excellent service in order to enhance efficient competitive services to their customers. Furthermore, it is recommended that tourism business provide products and services that will cater for the needs of inbound tourists based on the specific factors influencing customer satisfaction and the recommendation and revisiting of destinations. This study makes a significant contribution to the body of knowledge and practitioners as it has established the factors influencing inbound tourists’ experience and, how these factors influence customer satisfaction, recommending and revisiting of international tourists to South Africa. Furthermore, the study presents recommendations and practical strategies that could help tourism businesses improve inbound tourists’ experiences in South Africa. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Integration of clinical legal education with procedural law modules
- Authors: Welgemoed, Marc
- Date: 2021-12
- Subjects: Law -- Study and teaching (Clinical education) , Procedure law
- Language: English
- Type: Doctoral theses , Thesis
- Identifier: http://hdl.handle.net/10948/56123 , vital:55571
- Description: This research evaluates the role that Clinical Legal Education (CLE) can and should play in the teaching and learning of procedural law modules, ie Civil Procedure, Criminal Procedure and the Law of Evidence. It is argued that the doctrine of transformative constitutionalism provides a sound theoretical basis for the integration of CLE in the teaching and learning of procedural law modules in that there is a constitutional imperative on law schools to train law graduates, who are ready for entry into legal practice, as far as adequate theoretical knowledge and practical skills are concerned. This research provides an indication of how the integration of CLE with procedural law modules can improve the appreciation of the values of the Constitution of the Republic of South Africa 108 of 1996 by law graduates. Graduates will learn the importance of advancing social and procedural justice when rendering legal services to members of the public. Furthermore, graduates will be equipped with valuable graduate attributes required for legal practice. The conclusion of this research is that an integrated teaching and learning methodology, in relation to procedural law modules, will result in producing better law graduates for legal practice. The result of this will be that future legal practitioners, who can serve the public in a professional, ethical and accountable manner as envisaged by the Legal Practice Act 28 of 2014, immediately after graduating from law schools, will be produced. , Thesis (LLD) -- Faculty of Law, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Welgemoed, Marc
- Date: 2021-12
- Subjects: Law -- Study and teaching (Clinical education) , Procedure law
- Language: English
- Type: Doctoral theses , Thesis
- Identifier: http://hdl.handle.net/10948/56123 , vital:55571
- Description: This research evaluates the role that Clinical Legal Education (CLE) can and should play in the teaching and learning of procedural law modules, ie Civil Procedure, Criminal Procedure and the Law of Evidence. It is argued that the doctrine of transformative constitutionalism provides a sound theoretical basis for the integration of CLE in the teaching and learning of procedural law modules in that there is a constitutional imperative on law schools to train law graduates, who are ready for entry into legal practice, as far as adequate theoretical knowledge and practical skills are concerned. This research provides an indication of how the integration of CLE with procedural law modules can improve the appreciation of the values of the Constitution of the Republic of South Africa 108 of 1996 by law graduates. Graduates will learn the importance of advancing social and procedural justice when rendering legal services to members of the public. Furthermore, graduates will be equipped with valuable graduate attributes required for legal practice. The conclusion of this research is that an integrated teaching and learning methodology, in relation to procedural law modules, will result in producing better law graduates for legal practice. The result of this will be that future legal practitioners, who can serve the public in a professional, ethical and accountable manner as envisaged by the Legal Practice Act 28 of 2014, immediately after graduating from law schools, will be produced. , Thesis (LLD) -- Faculty of Law, 2021
- Full Text:
- Date Issued: 2021-12
Microstructural characterization of Swift Heavy Ion (SHI) induced rotation in single crystal NiO
- Authors: Douglas-Henry, Danielle
- 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/10948/53648 , vital:45685
- Description: Swift Heavy Ions (SHI) are characterised by having energies greater than 1 MeV per nucleon with an atomic mass greater than 6 amu. Exposure to irradiation of this type has been known to produce latent tracks in insulators. This is due to the energy loss through the material being governed by electronic excitation processes. The extent of the track formation and microstructural changes induced has been reported to be material specific. Models such as the thermal spike model have been used to explain these changes, however rough approximations are still made. A particularly under studied phenomena is the collective rotation seen in materials exposed to off-normal incidence irradiation. To date the only available experimental data is X-Ray Diffraction (XRD) spectra and surface shifts. This does not allow for depth-dependent rotation studies and very little can be deduced regarding the microstructure of the modified volume. In this study, the microstructural changes in single crystal Nickel Oxide (NiO) have been studied using electron microscopy techniques. A depth dependent investigation of the crystal rotation was performed using Selected Area Electron Diffraction (SAED), Transmission Kikuchi Diffraction (TKD) and Electron Backscatter Diffraction (EBSD). Transmission Electron Microscopy (TEM) and Scanning Transmission Electron Microscopy (STEM) were utilized to interrogate the microstructural changes facilitating the bulk rotation. Five different NiO specimens were investigated. Specimens had surfaces parallel to either the {0 0 1} or {1 1 1} planes. Ion energies used were 593 MeV, 940 MeV and 1.6 GeV, while fluences ranged from 1.0 x 1011 ions/cm² to 9.6 x 1014 ions/cm². Latent track formation in both low fluence (nonoverlapping regime) and high fluence (overlapping regime) specimens were investigated and compared. , Thesis (PhD) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
- Full Text: false
- Date Issued: 2021-12
- Authors: Douglas-Henry, Danielle
- 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/10948/53648 , vital:45685
- Description: Swift Heavy Ions (SHI) are characterised by having energies greater than 1 MeV per nucleon with an atomic mass greater than 6 amu. Exposure to irradiation of this type has been known to produce latent tracks in insulators. This is due to the energy loss through the material being governed by electronic excitation processes. The extent of the track formation and microstructural changes induced has been reported to be material specific. Models such as the thermal spike model have been used to explain these changes, however rough approximations are still made. A particularly under studied phenomena is the collective rotation seen in materials exposed to off-normal incidence irradiation. To date the only available experimental data is X-Ray Diffraction (XRD) spectra and surface shifts. This does not allow for depth-dependent rotation studies and very little can be deduced regarding the microstructure of the modified volume. In this study, the microstructural changes in single crystal Nickel Oxide (NiO) have been studied using electron microscopy techniques. A depth dependent investigation of the crystal rotation was performed using Selected Area Electron Diffraction (SAED), Transmission Kikuchi Diffraction (TKD) and Electron Backscatter Diffraction (EBSD). Transmission Electron Microscopy (TEM) and Scanning Transmission Electron Microscopy (STEM) were utilized to interrogate the microstructural changes facilitating the bulk rotation. Five different NiO specimens were investigated. Specimens had surfaces parallel to either the {0 0 1} or {1 1 1} planes. Ion energies used were 593 MeV, 940 MeV and 1.6 GeV, while fluences ranged from 1.0 x 1011 ions/cm² to 9.6 x 1014 ions/cm². Latent track formation in both low fluence (nonoverlapping regime) and high fluence (overlapping regime) specimens were investigated and compared. , Thesis (PhD) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
- Full Text: false
- Date Issued: 2021-12
Ocean structures and dynamics of two open bays on the eastern Agulhas Bank
- Authors: Dlomo, Xolisa
- 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/10948/53607 , vital:45680
- Description: Upwelling, bay-scale currents, fronts and mixing in Algoa Bay and St Francis Bay occur over both short and long time periods. These physical ocean dynamics drive the temporal and spatial distribution of nutrients in the bays, there by influencing primary and secondary production. Thermal gradients and fronts are driven by the wind and open ocean influences, such as the Agulhas Current, daily and seasonal variations in solar radiation, long and short period waves, air-sea fluxes, coastal trapped waves and terrestrial freshwater inflow. These phenomena are poorly understood along this part of the coastline and were the focus of this study. I investigated the dominant temperature scales of variability in both bays, to determine which isotherm is best suited to describe temperature fluctuations and thermocline spatiotemporal variability in and between the two bays. I investigated upwelling spatiotemporal variability in the two bays and tested whether upwelling occurs at the opposite sides of the bays with a change in wind direction. Thereafter studied the occurrence and drivers of winter upwelling events. The wind-driven current spatiotemporal variability and correlations were investigated at the extremities of the two bays. The daily, intra-seasonal and yearly variation in temperature structures in Algoa Bay and St. Francis Bay were mainly driven by the local winds, coastal topography, and bathymetry. The most suitable isotherm to describe thermal fluctuations and variability in Algoa Bay shallower sites was 16.5 °C and its mean depth was 16.2 m. The best isotherm for the deeper sites in Algoa Bay was 15.7 °C with a depth of 33.1 m. The average temperature and depth of the best isotherm to describe thermal fluctuations in St. Francis Bay for the shallower sites was15.80 °C and 16.83 m, and for the deeper sites it was 15.10 °C and 32.08 m. Algoa Bay showed an average cooling trend of -0.000172 °C per year, whereas in St. Francis Bay a warming average trend of 0.0188 °C per year was observed over the study period often and six years, respectively. The wind, Coriolis Effect and Ekman Transport were the main external forces that influenced upwelling throughout the year. Since the available mesoscale indices for upwelling intensity lack the resolution needed to characterize and compare inner-shelf upwelling regimes at small spatial scales, I developed a new local, quantitative index of thermal variability. Index calculations were based on hourly records of in site depth-averaged temperatures, measured at 6 sites in St. Francis Bay and at 8 sites in Algoa Bay. Using the Multivariate Upwelling Zone Index of Cooling (MUZIC) I found that Woody Cape and Blue Horizon Bay had the highest upwelling intensity in Algoa Bay and St. Francis Bay, respectively. The other sites were ordinated and ranked according to their upwelling rates and intensity. Evidence of wind-driven winter upwelling was found to be a common occurrence in both bays. There was no obvious current seasonality observed, however, strong spectral signals in the period of a weather band (4 –7 days) were present. Current structures were generally positively correlated with wind variations in both bays. Thus, when westerly/easterly winds blew the overall surface current direction was eastward/westward. I observed a pronounced current spatiotemporal variability that was driven by local winds. The Bird Island surface currents in Algoa Bay were strongly correlated at 0–lag day with the winds, however, in Cape Recife the strongest correlations were usually observed at 1–lag day highlighting the spatiotemporal influence of wind regimes on current structures in Algoa Bay. Bird Island current speeds were higher and had an obvious bimodal directional variation (south westward /north eastward) compared to Cape Recife currents, which generally had a slower current speed with a strong west-north westward direction. In St. Francis Bay, the Schoenmakerskop surface currents showed weak positive correlation with winds at 0–lag day, however, stronger negative correlations were observed at 4–lag days. The current surface speeds in Schoenmakerskop were the lowest and varied directionally between north-north eastward and south-south eastward. The basic data requirements (i.e. SST/ UTR and ADCP time series) and the simplicity of the calculations make these indices a useful tool to apply to a large number of sites nationally and internationally, and to examine the generality of community and population-level responses to physical forcing. , Thesis (PhD) -- Faculty of Science, Journalsim and Media Studies, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Dlomo, Xolisa
- 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/10948/53607 , vital:45680
- Description: Upwelling, bay-scale currents, fronts and mixing in Algoa Bay and St Francis Bay occur over both short and long time periods. These physical ocean dynamics drive the temporal and spatial distribution of nutrients in the bays, there by influencing primary and secondary production. Thermal gradients and fronts are driven by the wind and open ocean influences, such as the Agulhas Current, daily and seasonal variations in solar radiation, long and short period waves, air-sea fluxes, coastal trapped waves and terrestrial freshwater inflow. These phenomena are poorly understood along this part of the coastline and were the focus of this study. I investigated the dominant temperature scales of variability in both bays, to determine which isotherm is best suited to describe temperature fluctuations and thermocline spatiotemporal variability in and between the two bays. I investigated upwelling spatiotemporal variability in the two bays and tested whether upwelling occurs at the opposite sides of the bays with a change in wind direction. Thereafter studied the occurrence and drivers of winter upwelling events. The wind-driven current spatiotemporal variability and correlations were investigated at the extremities of the two bays. The daily, intra-seasonal and yearly variation in temperature structures in Algoa Bay and St. Francis Bay were mainly driven by the local winds, coastal topography, and bathymetry. The most suitable isotherm to describe thermal fluctuations and variability in Algoa Bay shallower sites was 16.5 °C and its mean depth was 16.2 m. The best isotherm for the deeper sites in Algoa Bay was 15.7 °C with a depth of 33.1 m. The average temperature and depth of the best isotherm to describe thermal fluctuations in St. Francis Bay for the shallower sites was15.80 °C and 16.83 m, and for the deeper sites it was 15.10 °C and 32.08 m. Algoa Bay showed an average cooling trend of -0.000172 °C per year, whereas in St. Francis Bay a warming average trend of 0.0188 °C per year was observed over the study period often and six years, respectively. The wind, Coriolis Effect and Ekman Transport were the main external forces that influenced upwelling throughout the year. Since the available mesoscale indices for upwelling intensity lack the resolution needed to characterize and compare inner-shelf upwelling regimes at small spatial scales, I developed a new local, quantitative index of thermal variability. Index calculations were based on hourly records of in site depth-averaged temperatures, measured at 6 sites in St. Francis Bay and at 8 sites in Algoa Bay. Using the Multivariate Upwelling Zone Index of Cooling (MUZIC) I found that Woody Cape and Blue Horizon Bay had the highest upwelling intensity in Algoa Bay and St. Francis Bay, respectively. The other sites were ordinated and ranked according to their upwelling rates and intensity. Evidence of wind-driven winter upwelling was found to be a common occurrence in both bays. There was no obvious current seasonality observed, however, strong spectral signals in the period of a weather band (4 –7 days) were present. Current structures were generally positively correlated with wind variations in both bays. Thus, when westerly/easterly winds blew the overall surface current direction was eastward/westward. I observed a pronounced current spatiotemporal variability that was driven by local winds. The Bird Island surface currents in Algoa Bay were strongly correlated at 0–lag day with the winds, however, in Cape Recife the strongest correlations were usually observed at 1–lag day highlighting the spatiotemporal influence of wind regimes on current structures in Algoa Bay. Bird Island current speeds were higher and had an obvious bimodal directional variation (south westward /north eastward) compared to Cape Recife currents, which generally had a slower current speed with a strong west-north westward direction. In St. Francis Bay, the Schoenmakerskop surface currents showed weak positive correlation with winds at 0–lag day, however, stronger negative correlations were observed at 4–lag days. The current surface speeds in Schoenmakerskop were the lowest and varied directionally between north-north eastward and south-south eastward. The basic data requirements (i.e. SST/ UTR and ADCP time series) and the simplicity of the calculations make these indices a useful tool to apply to a large number of sites nationally and internationally, and to examine the generality of community and population-level responses to physical forcing. , Thesis (PhD) -- Faculty of Science, Journalsim and Media Studies, 2021
- Full Text:
- Date Issued: 2021-12
Possible futures for South Africa’s transition to a low carbon economy towards 2050
- Authors: Myeki, Pumla Qamisa
- Date: 2021-12
- Subjects: Environmental economics -- South Africa , Carbon dioxide mitigation -- Economic aspects -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54969 , vital:48523
- Description: South Africa together with the rest of the world have been caught up in a new policy wave of developing policies that support the move towards sustainable, low-carbon and climate-resilient economies underpinned by the desire to reduce greenhouse gas (GHG) emissions as per declared Intended Nationally Determined Contributions (INDCs). However, South Africa’s economic development model is still characterised by a coal-based energy structure, which imposes a significant stress on its natural resources and environment, due to vast quantities of GHG emissions into the atmosphere. Currently, in South Africa there is no sign of any coherent plan for achieving the socio-technological change that the transition to a low carbon economy vision implies. The existing policies, strategies and plans are not yet fully aligned with the low carbon transition agenda as they were developed prior to the United Nations Framework Convention on Climate Change (UNFCCC) Paris Agreement call. There has been minimal or no noticeable change in South Africa’s carbon-dependence, which may further lead to market failure effects. The existing policy and regulatory framework for low carbon economy (LCE) transition is perceived complimentary; but is defined by short-term, overarching and vague policies that lack forward thinking far-sighted element of framing the desired future. To tackle the short-termism of South African LCE policy, the study commissioned a mixed-method, futures research approach in order to facilitate a kind of forward thinking required for integrated manoeuvres and long-term vision of different alternating choices with a cognisance of their respective repercussions. The primary research objective of this study was to develop and illustrate possible scenarios for South Africa’s low-carbon economy transition futures over the next 30 years, taking into consideration numerous uncertainties about the future structure of South Africa’s economy, costs of the transition as well as potential technological breakthroughs that could emerge. This objective was achieved with the ultimate description of possible futures - Ses’fikile, Stimela, Inqanawa and Siyaya phambili, and the identification of Ses’fikile as the desired future state; as outlined by the Integrated Vision for South Africa’s transition to an inclusive, competitive, climate-resilient and low carbon economy future. Further, the secondary objectives outlined in Chapter 1 and 2 of this research study were realised through an all-encompassing literature review, political economy and political, economic, social, technological, environmental, legal (PESTEL) analysis, the Real-Time Delphi exercise as well as scenario planning methodology. This research study extracts intuitions from academic, policy planning and futures research in order to discover the prevailing frontiers in the progression of both the theoretical and real-world requirements considered as essential for fundamental economic transformation to a low-carbon future. Extensive contribution of this study included; - Closing the literature gaps that exist in terms of gaining a deeper understanding into insights on the potential drivers, impacts and global trends in the low-carbon economy transition space. Pushing forward a narrative within and between the economic development, policy decision-making and environment about how to visualise and plan for a decarbonized future economy for South Africa. Futures research approach afforded this research study an opportunity to engage with the uncertainties of the low-carbon economy future, while engaging with emerging issues, trends and weak signals that are transforming South Africa’s social horizons. Policy decision-makers were afforded a chance to improve their policy making while addressing the dynamic nature of implications of the current economic development trajectories, alternative future possibilities as well as transitioning to a preferred low-carbon future. In conclusion, contributions made by low-carbon experts who participated in this study provided bigger picture insights for policy decision makers and can provide timely interventions while deliberating about South Africa’s low-carbon future. Finally, conclusions drawn and recommendations made would assist in the stimulation of discussions for further policy research. Key concepts: Low carbon economy, decarbonisation, futures research, climate-resilient, scenario planning, Real-Time Delphi. , Thesis (DBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Myeki, Pumla Qamisa
- Date: 2021-12
- Subjects: Environmental economics -- South Africa , Carbon dioxide mitigation -- Economic aspects -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54969 , vital:48523
- Description: South Africa together with the rest of the world have been caught up in a new policy wave of developing policies that support the move towards sustainable, low-carbon and climate-resilient economies underpinned by the desire to reduce greenhouse gas (GHG) emissions as per declared Intended Nationally Determined Contributions (INDCs). However, South Africa’s economic development model is still characterised by a coal-based energy structure, which imposes a significant stress on its natural resources and environment, due to vast quantities of GHG emissions into the atmosphere. Currently, in South Africa there is no sign of any coherent plan for achieving the socio-technological change that the transition to a low carbon economy vision implies. The existing policies, strategies and plans are not yet fully aligned with the low carbon transition agenda as they were developed prior to the United Nations Framework Convention on Climate Change (UNFCCC) Paris Agreement call. There has been minimal or no noticeable change in South Africa’s carbon-dependence, which may further lead to market failure effects. The existing policy and regulatory framework for low carbon economy (LCE) transition is perceived complimentary; but is defined by short-term, overarching and vague policies that lack forward thinking far-sighted element of framing the desired future. To tackle the short-termism of South African LCE policy, the study commissioned a mixed-method, futures research approach in order to facilitate a kind of forward thinking required for integrated manoeuvres and long-term vision of different alternating choices with a cognisance of their respective repercussions. The primary research objective of this study was to develop and illustrate possible scenarios for South Africa’s low-carbon economy transition futures over the next 30 years, taking into consideration numerous uncertainties about the future structure of South Africa’s economy, costs of the transition as well as potential technological breakthroughs that could emerge. This objective was achieved with the ultimate description of possible futures - Ses’fikile, Stimela, Inqanawa and Siyaya phambili, and the identification of Ses’fikile as the desired future state; as outlined by the Integrated Vision for South Africa’s transition to an inclusive, competitive, climate-resilient and low carbon economy future. Further, the secondary objectives outlined in Chapter 1 and 2 of this research study were realised through an all-encompassing literature review, political economy and political, economic, social, technological, environmental, legal (PESTEL) analysis, the Real-Time Delphi exercise as well as scenario planning methodology. This research study extracts intuitions from academic, policy planning and futures research in order to discover the prevailing frontiers in the progression of both the theoretical and real-world requirements considered as essential for fundamental economic transformation to a low-carbon future. Extensive contribution of this study included; - Closing the literature gaps that exist in terms of gaining a deeper understanding into insights on the potential drivers, impacts and global trends in the low-carbon economy transition space. Pushing forward a narrative within and between the economic development, policy decision-making and environment about how to visualise and plan for a decarbonized future economy for South Africa. Futures research approach afforded this research study an opportunity to engage with the uncertainties of the low-carbon economy future, while engaging with emerging issues, trends and weak signals that are transforming South Africa’s social horizons. Policy decision-makers were afforded a chance to improve their policy making while addressing the dynamic nature of implications of the current economic development trajectories, alternative future possibilities as well as transitioning to a preferred low-carbon future. In conclusion, contributions made by low-carbon experts who participated in this study provided bigger picture insights for policy decision makers and can provide timely interventions while deliberating about South Africa’s low-carbon future. Finally, conclusions drawn and recommendations made would assist in the stimulation of discussions for further policy research. Key concepts: Low carbon economy, decarbonisation, futures research, climate-resilient, scenario planning, Real-Time Delphi. , Thesis (DBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Post-apartheid geographies of studentification at Nelson Mandela University, Port Elizabeth, South Africa
- Authors: Mzileni, Pedro Mihlali
- 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/10948/53758 , vital:45759
- Description: This study takes the concept of studentification from its British conception to the post-apartheid African city, Port Elizabeth (Gqeberha), where the Nelson Mandela University is situated. Studentification refers to the mass arrival of students in university cities and towns and the economic, infrastructural, geographic and sociopolitical changes that the settlements of these students make overtime to such cities and towns. For the case of Nelson Mandela University in Port Elizabeth, this study identified four major areas that are engulfed by studentification and sought to understand how this phenomenon takes shape in them. The study extends the existing terms and languages used to comprehend studentification by introducing a viewpoint of how it emerges in an African post-apartheid city. This is a city that has deindustrialised and has also experienced a capital flight out of its city centre since the 1970s. These declining economic indicators over decades have left the city to decay and experience high rates of unemployment, poverty and housing displacements. But, the post-1994 massification of the South African higher education system introduced new micro-economies for the city mainly through the emergence of student accommodation as a thriving business opportunity in the city in light of increased university enrolments. However, the economic injection brought by student accommodation in this city that has been deindustrialising remains minimal in having the necessary power to turnaround the city’s fortunes and transform the urban space towards a developmental path. This socioeconomic problem is also compounded by the presence of a weak arm of the state (particularly local government) that is unable to play an active role in driving capital flows to deliver tangible urban development. As a result, the university emerges as one of the active public actors in the renewal efforts of the city even though this is not its primary mandate. Thus, the process of studentification in this case takes place in a context defined by a declining higher education political economy and a weak city planning regime. As a result, these factors leave studentification to be vulnerable to being impacted by old colonial-apartheid structures of the city and the economic shortfalls of post-apartheid urban South Africa that have produced a precarious urban space where the private property market and the illicit economy have a stronger hand in determining the power relations that emerge in the city space. Studentification in this African city is expressed in four major geographies: (1) the Summerstrand suburb that is nearest to the University’s main urban campuses, (2) the Central CBD that has experienced capital flight and currently has tall buildings that are former offices of apartheid commerce which have been converted to student accommodation, (3) the deindustrialised and abandoned manufacturing sites at the North End margins of the city which have also been converted to student accommodation, and (4) the Zwide township, an underprivileged black community that is close to the former black Missionvale campus of the University – this is the furthest student accommodation area in the city. The study examines these student communities that emerge out of these four identified areas of the urban space and it also underscores the genre of the political, social, and economic relations of each of these four geographies and their interconnectedness. The study found that the South African post-apartheid city is characterised by an urban model and a university campus design that is a structural outcome of colonisation, apartheid spatial planning, and racial capitalism that still has continuing legacies today. As a result, these four geographies of studentification in the city are historical, racial and economic outcomes of urban power relations that originate from colonialism. Key defining features of studentification in each of these four areas were identified and analysed to illustrate that the South African account of studentification resembles the city’s apartheid legacy and these untransformed urban structures get further compounded by the country’s underfunded higher education massification strategy, its declining economic indicators and a weak state that has ‘soft’ planning and governance systems that are unable to decisively impact the trajectory of socioeconomic development in this university city. These intersecting forces translate into precarious day-to-day student life experiences and structural complications for the governance of the University and the city. These socioeconomic misfortunes also handicap the potential of the city to renew through a studentification economy. Henri Lefebvre’s Production of Space Theory was utilised to frame the study. Methodologically, the study utilised qualitative narrative interviews and document interpretation. This is the first doctoral thesis written about the concept of studentification in South Africa. , Thesis (PhD) -- Faculty of Humanities, The Department of Sociology and Anthropology, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mzileni, Pedro Mihlali
- 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/10948/53758 , vital:45759
- Description: This study takes the concept of studentification from its British conception to the post-apartheid African city, Port Elizabeth (Gqeberha), where the Nelson Mandela University is situated. Studentification refers to the mass arrival of students in university cities and towns and the economic, infrastructural, geographic and sociopolitical changes that the settlements of these students make overtime to such cities and towns. For the case of Nelson Mandela University in Port Elizabeth, this study identified four major areas that are engulfed by studentification and sought to understand how this phenomenon takes shape in them. The study extends the existing terms and languages used to comprehend studentification by introducing a viewpoint of how it emerges in an African post-apartheid city. This is a city that has deindustrialised and has also experienced a capital flight out of its city centre since the 1970s. These declining economic indicators over decades have left the city to decay and experience high rates of unemployment, poverty and housing displacements. But, the post-1994 massification of the South African higher education system introduced new micro-economies for the city mainly through the emergence of student accommodation as a thriving business opportunity in the city in light of increased university enrolments. However, the economic injection brought by student accommodation in this city that has been deindustrialising remains minimal in having the necessary power to turnaround the city’s fortunes and transform the urban space towards a developmental path. This socioeconomic problem is also compounded by the presence of a weak arm of the state (particularly local government) that is unable to play an active role in driving capital flows to deliver tangible urban development. As a result, the university emerges as one of the active public actors in the renewal efforts of the city even though this is not its primary mandate. Thus, the process of studentification in this case takes place in a context defined by a declining higher education political economy and a weak city planning regime. As a result, these factors leave studentification to be vulnerable to being impacted by old colonial-apartheid structures of the city and the economic shortfalls of post-apartheid urban South Africa that have produced a precarious urban space where the private property market and the illicit economy have a stronger hand in determining the power relations that emerge in the city space. Studentification in this African city is expressed in four major geographies: (1) the Summerstrand suburb that is nearest to the University’s main urban campuses, (2) the Central CBD that has experienced capital flight and currently has tall buildings that are former offices of apartheid commerce which have been converted to student accommodation, (3) the deindustrialised and abandoned manufacturing sites at the North End margins of the city which have also been converted to student accommodation, and (4) the Zwide township, an underprivileged black community that is close to the former black Missionvale campus of the University – this is the furthest student accommodation area in the city. The study examines these student communities that emerge out of these four identified areas of the urban space and it also underscores the genre of the political, social, and economic relations of each of these four geographies and their interconnectedness. The study found that the South African post-apartheid city is characterised by an urban model and a university campus design that is a structural outcome of colonisation, apartheid spatial planning, and racial capitalism that still has continuing legacies today. As a result, these four geographies of studentification in the city are historical, racial and economic outcomes of urban power relations that originate from colonialism. Key defining features of studentification in each of these four areas were identified and analysed to illustrate that the South African account of studentification resembles the city’s apartheid legacy and these untransformed urban structures get further compounded by the country’s underfunded higher education massification strategy, its declining economic indicators and a weak state that has ‘soft’ planning and governance systems that are unable to decisively impact the trajectory of socioeconomic development in this university city. These intersecting forces translate into precarious day-to-day student life experiences and structural complications for the governance of the University and the city. These socioeconomic misfortunes also handicap the potential of the city to renew through a studentification economy. Henri Lefebvre’s Production of Space Theory was utilised to frame the study. Methodologically, the study utilised qualitative narrative interviews and document interpretation. This is the first doctoral thesis written about the concept of studentification in South Africa. , Thesis (PhD) -- Faculty of Humanities, The Department of Sociology and Anthropology, 2021
- Full Text:
- Date Issued: 2021-12
Preventive diplomacy and conflict prevention in Africa: an examination of South Africa’s role in conflict resolution in the Democratic Republic of The Congo
- Authors: Mandela, Siyabulela
- 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/10948/54471 , vital:46584
- Description: The Agenda 2063 tabled a blueprint of seven aspirations, for the Africa we want and one which was critical to this study being a peaceful and secure Africa. As postulated in this aspiration, by Agenda 2063, “Africa shall be free from armed conflict, terrorism, extremism, intolerance, and gender-based violence, which are major threats to human security, peace and development”. The Assembly of the AU committed in the agenda to fast-track actions to silence the guns by 2020, through enhanced dialogue-centred conflict prevention and resolution. The deadline for silencing guns and ending all wars in Africa was 2020, which has passed and Africa remains characterised by violent conflict and underdevelopment. Violent conflict of different magnitudes continues unabated across different states in Africa and remain insolent to any means towards resolution. The African continent is also a host to the most fragile states in the world, and the governments of these countries are unable to cultivate or facilitate the necessary conditions needed for sustainable peace and development. The conditions of poverty, frustration of basic human needs, maladministration, corruption, mismanagement of diversity and ethnic divisions so prevalent in Africa increase the likelihood of violent conflict. Conflict provention, preventive diplomacy, problem-solving workshops, peacebuilding and peacekeeping are all variants of peace operations deemed crucial in this study for Africa’s stability, peace and development. The advancement of preventive diplomacy and conflict provention as a hybrid framework for the prevention and resolution of violent conflict and promotion of sustainable peace and development in Africa was at the centre of this study. The study adopted John Burton’s basic human needs theory as a theoretical framework to further highlight an urgency by African states to prioritise policies and conflict resolution efforts directed at addressing the underlying issues giving rise to violent conflicts, if sustainable peace and development was to be realised in the continent. , Thesis (PhD) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mandela, Siyabulela
- 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/10948/54471 , vital:46584
- Description: The Agenda 2063 tabled a blueprint of seven aspirations, for the Africa we want and one which was critical to this study being a peaceful and secure Africa. As postulated in this aspiration, by Agenda 2063, “Africa shall be free from armed conflict, terrorism, extremism, intolerance, and gender-based violence, which are major threats to human security, peace and development”. The Assembly of the AU committed in the agenda to fast-track actions to silence the guns by 2020, through enhanced dialogue-centred conflict prevention and resolution. The deadline for silencing guns and ending all wars in Africa was 2020, which has passed and Africa remains characterised by violent conflict and underdevelopment. Violent conflict of different magnitudes continues unabated across different states in Africa and remain insolent to any means towards resolution. The African continent is also a host to the most fragile states in the world, and the governments of these countries are unable to cultivate or facilitate the necessary conditions needed for sustainable peace and development. The conditions of poverty, frustration of basic human needs, maladministration, corruption, mismanagement of diversity and ethnic divisions so prevalent in Africa increase the likelihood of violent conflict. Conflict provention, preventive diplomacy, problem-solving workshops, peacebuilding and peacekeeping are all variants of peace operations deemed crucial in this study for Africa’s stability, peace and development. The advancement of preventive diplomacy and conflict provention as a hybrid framework for the prevention and resolution of violent conflict and promotion of sustainable peace and development in Africa was at the centre of this study. The study adopted John Burton’s basic human needs theory as a theoretical framework to further highlight an urgency by African states to prioritise policies and conflict resolution efforts directed at addressing the underlying issues giving rise to violent conflicts, if sustainable peace and development was to be realised in the continent. , Thesis (PhD) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Sustainable strategies for improved implementation of South Africa's marine living resource legislation
- Authors: Tembo, Danai
- Date: 2021-12
- Subjects: Marine resources conservation -- law and legislation -- South Africa , Fishery law and legislation -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54729 , vital:47531
- Description: South Africa's marine and coastal resources are rich, diverse national assets that represent an important interface of human activity, socio-economic influence, and ecological diversity. The Exclusive Economic Zone (EEZ) has rich fishing grounds that support an industry that makes significant contributions to the economy, providing hundreds of thousands of jobs. Use of this resource-rich ocean space has increased over time. The challenge for South Africa is finding a balance between protecting the ocean space while simultaneously encouraging research, investment, and use of the ocean resources to contribute to economic upliftment and job creation. The South African government's recognition of the vast potential in coastal ecosystems is evident in the introduction of programmes such as Operation Phakisa and the comprehensive legislation. Legislation such as the Marine Living Resources Act (Act No. 18 of 1998) aims to ensure the sustainable utilisation of marine living resources in a manner that is beneficial to all citizens. South Africa's marine living resource legislation is good, reflecting the main principles of fisheries management that are encouraged by the international legal order. However, implementation of the legislation continues to be a challenge; one that extends beyond marine living resource legislation. Although this challenge is acknowledged by the government, little work has been done to understand why they continue to fall short in terms of implementation. Understanding that the implementation of statutes involves various actors, the study sought to understand implementation failures related to marine living resource legislation by explaining the behaviours of actors involved in implementation. A conceptual framework was developed that identified a variety of influencing factors, drawing on elements from different theories. Guided by the framework, document analysis, and key-informant interviews were the means through which the behaviours of actors were investigated and explained. Findings showed that the behaviours of actors were directly and indirectly influenced to varying degrees, by the tractability of the problem, the formal conditions of the law, enforcement, capacity, power relations, and political salience. These behaviours were in turn found to have a strong influence on the status of marine living resources, identified as the implementation outcome. In recognising the behaviours contributing to implementation failures, recommendations were made for improved implementation efforts going forward. Acting to correct these failures will be critical to ensuring South Africa does not continue its current trajectory of marine living resource depletion. Resources that not only make significant contributions to the country's economy but constitute the livelihoods of a significant portion of the country's population. , Thesis (DPHIL) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Tembo, Danai
- Date: 2021-12
- Subjects: Marine resources conservation -- law and legislation -- South Africa , Fishery law and legislation -- South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54729 , vital:47531
- Description: South Africa's marine and coastal resources are rich, diverse national assets that represent an important interface of human activity, socio-economic influence, and ecological diversity. The Exclusive Economic Zone (EEZ) has rich fishing grounds that support an industry that makes significant contributions to the economy, providing hundreds of thousands of jobs. Use of this resource-rich ocean space has increased over time. The challenge for South Africa is finding a balance between protecting the ocean space while simultaneously encouraging research, investment, and use of the ocean resources to contribute to economic upliftment and job creation. The South African government's recognition of the vast potential in coastal ecosystems is evident in the introduction of programmes such as Operation Phakisa and the comprehensive legislation. Legislation such as the Marine Living Resources Act (Act No. 18 of 1998) aims to ensure the sustainable utilisation of marine living resources in a manner that is beneficial to all citizens. South Africa's marine living resource legislation is good, reflecting the main principles of fisheries management that are encouraged by the international legal order. However, implementation of the legislation continues to be a challenge; one that extends beyond marine living resource legislation. Although this challenge is acknowledged by the government, little work has been done to understand why they continue to fall short in terms of implementation. Understanding that the implementation of statutes involves various actors, the study sought to understand implementation failures related to marine living resource legislation by explaining the behaviours of actors involved in implementation. A conceptual framework was developed that identified a variety of influencing factors, drawing on elements from different theories. Guided by the framework, document analysis, and key-informant interviews were the means through which the behaviours of actors were investigated and explained. Findings showed that the behaviours of actors were directly and indirectly influenced to varying degrees, by the tractability of the problem, the formal conditions of the law, enforcement, capacity, power relations, and political salience. These behaviours were in turn found to have a strong influence on the status of marine living resources, identified as the implementation outcome. In recognising the behaviours contributing to implementation failures, recommendations were made for improved implementation efforts going forward. Acting to correct these failures will be critical to ensuring South Africa does not continue its current trajectory of marine living resource depletion. Resources that not only make significant contributions to the country's economy but constitute the livelihoods of a significant portion of the country's population. , Thesis (DPHIL) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Team-related factors influencing intra-team knowledge sharing in knowledge-intensive businesses
- Authors: Van Greunen, Conrad
- Date: 2021-12
- Subjects: Knowledge management , Organizational behavior
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54630 , vital:46873
- Description: In today’s knowledge-driven economy, knowledge is regarded as possibly the most important factor of production next to labour, land and capital. Knowledge is the lifeblood of a business and therefore crucial for its survival in today’s constantly changing and competitive economic environment. In fact, effective knowledge management holds many benefits for an organisation, such as increased productivity and enhanced business performance. Knowledge management is therefore key to ensure business success. In the knowledge management process, knowledge-sharing is typically recognised as the most important activity. Knowledge that is not shared, in particular tacit knowledge residing in the minds of individuals and accrued over time, loses its value. Notably, team knowledge-sharing is of utmost importance in that it enables a team to resolve practical issues more successfully, given that knowledge is shared among team members that hold various kinds of specialised and unique expertise. Organisations increasingly organise their specialised knowledge-intensive work around projects that consist of allocated members who cooperate on a regular basis to accomplish specific goals before a set deadline. However, without knowledge-sharing among team members, the diverse knowledge of various members cannot be optimally utilised to the benefit of the team and the organisation. Although it is well documented that knowledge-sharing among team members, in particular knowledge-intensive teams, may hold various advantages for teams and organisations in terms of their performance and competitive advantage, researchers also acknowledge that individuals are sometimes reluctant to share their knowledge. Moreover, there is a lack of empirical research on the team-related factors influencing intra-team knowledge-sharing, and a subsequent lack of guidance in terms of encouraging intra-team knowledge-sharing behaviour. Notably, the lack of current systematic, integrated research, that pay particular attention to the team-related factors influencing the knowledge-sharing behaviour within a team is problematic. This lack of research calls for further empirical research to better understand the teamrelated factors influencing intra-team knowledge-sharing behaviour in knowledgeintensive teams. As such, the main research objective of this study was to identify and empirically examine selected team-related factors influencing the intra-team knowledge-sharing behaviour of individual members participating in knowledgeintensive teams in knowledge-intensive businesses. Based on an extensive literature review, the following team-related factors influencing knowledge-sharing in a team context were identified and hypothesised to have a relationship with the dependent variable Intra-team knowledge-sharing behaviour. These factors, which also served as the independent variables in this study, are: Team development competition, Team hyper-competition, Team psychological safety, Perceived surface-level diversity, Perceived deep-level diversity, Team identification, Metacognitive cultural intelligence, Cognitive cultural intelligence, Motivational cultural intelligence, Behavioural cultural intelligence, Affective team commitment, Continuance team commitment and Normative team commitment. Following the construction of the proposed hypothesised model, the researcher proceeded to develop a research design that would be suitable to address the research questions. For the purpose of this study, a positivist research philosophy and deductive approach to theory building were adopted, which is in line with the quantitative nature of this study. In addition, a survey research strategy was used and the study was cross-sectional in nature. The measuring instrument, which was in the form of a self-administered online questionnaire, was subjected to a pilot study. Minor adjustments were made to the questionnaire before an electronic link to the final version, accompanied by a cover letter, was e-mailed to 8 496 potential respondents. These potential respondents, who were identified using a convenience sampling technique, were likely to participate in knowledge-intensive teams and be representative of the population. A total of 384 usable responses were received. Following the data collection, the data were analysed to examine the proposed relationships as depicted in the hypothesised model. To address possible multicollinearity concerns associated with different variables that belong to a shared category, such variables were first combined into a single hierarchical variable. Thereafter, a confirmatory factor analysis (CFA) was performed on each factor that confirmed the factor structures by using various goodness-of-fit indices. Subsequent to the CFAs, the validity and reliability of the measuring instrument was assessed. The reliability of the measuring instrument was evaluated using Cronbach’s alpha coefficients, while the assessment of validity involved calculations of the average variance extracted (AVE) estimates and squared correlations between constructs. Based on the results of the reliability and validity assessments, the hypothesised model was revised accordingly. The revised model included Team development competition, Team psychological safety, Cultural intelligence, Team commitment and Perceived deep-level diversity as the independent variables influencing Intra-team knowledge-sharing behaviour. Descriptive statistics and correlation results were presented on the constructs in the revised hypothesised model, while a structural equation modelling (SEM) analysis was the main statistical technique used to test the significance of the relationships between the dependent and the independent variables. The relationships between selected demographic variables and Intra-team knowledge-sharing behaviour were assessed by means of general linear modelling (GLM), a subset of SEM. In light of these analyses, it was concluded that Team psychological safety, Team development competition, Cultural intelligence and Age have a significant influence on Intra-team knowledge-sharing behaviour and could thus be seen as predictors or determinants thereof. Of all the significant relationships identified in this study, Team psychological safety had the strongest effect on Intra-team knowledge-sharing behaviour. One should, however, not lose sight of the impact that competition and cultural intelligence could have on the knowledge-sharing behaviour of individual members participating in knowledge-intensive teams. This study contributes to the body of knowledge-sharing research in general, but also to knowledge-sharing behaviour in a team context in particular. Besides the theoretical contributions, this study makes several practical recommendations to knowledgeintensive businesses on how to manage the team-related factors influencing the Intrateam knowledge-sharing behaviour of individual members participating in knowledgeintensive teams. These recommendations could possibly enhance the competitive advantage of knowledge-intensive businesses. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Van Greunen, Conrad
- Date: 2021-12
- Subjects: Knowledge management , Organizational behavior
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54630 , vital:46873
- Description: In today’s knowledge-driven economy, knowledge is regarded as possibly the most important factor of production next to labour, land and capital. Knowledge is the lifeblood of a business and therefore crucial for its survival in today’s constantly changing and competitive economic environment. In fact, effective knowledge management holds many benefits for an organisation, such as increased productivity and enhanced business performance. Knowledge management is therefore key to ensure business success. In the knowledge management process, knowledge-sharing is typically recognised as the most important activity. Knowledge that is not shared, in particular tacit knowledge residing in the minds of individuals and accrued over time, loses its value. Notably, team knowledge-sharing is of utmost importance in that it enables a team to resolve practical issues more successfully, given that knowledge is shared among team members that hold various kinds of specialised and unique expertise. Organisations increasingly organise their specialised knowledge-intensive work around projects that consist of allocated members who cooperate on a regular basis to accomplish specific goals before a set deadline. However, without knowledge-sharing among team members, the diverse knowledge of various members cannot be optimally utilised to the benefit of the team and the organisation. Although it is well documented that knowledge-sharing among team members, in particular knowledge-intensive teams, may hold various advantages for teams and organisations in terms of their performance and competitive advantage, researchers also acknowledge that individuals are sometimes reluctant to share their knowledge. Moreover, there is a lack of empirical research on the team-related factors influencing intra-team knowledge-sharing, and a subsequent lack of guidance in terms of encouraging intra-team knowledge-sharing behaviour. Notably, the lack of current systematic, integrated research, that pay particular attention to the team-related factors influencing the knowledge-sharing behaviour within a team is problematic. This lack of research calls for further empirical research to better understand the teamrelated factors influencing intra-team knowledge-sharing behaviour in knowledgeintensive teams. As such, the main research objective of this study was to identify and empirically examine selected team-related factors influencing the intra-team knowledge-sharing behaviour of individual members participating in knowledgeintensive teams in knowledge-intensive businesses. Based on an extensive literature review, the following team-related factors influencing knowledge-sharing in a team context were identified and hypothesised to have a relationship with the dependent variable Intra-team knowledge-sharing behaviour. These factors, which also served as the independent variables in this study, are: Team development competition, Team hyper-competition, Team psychological safety, Perceived surface-level diversity, Perceived deep-level diversity, Team identification, Metacognitive cultural intelligence, Cognitive cultural intelligence, Motivational cultural intelligence, Behavioural cultural intelligence, Affective team commitment, Continuance team commitment and Normative team commitment. Following the construction of the proposed hypothesised model, the researcher proceeded to develop a research design that would be suitable to address the research questions. For the purpose of this study, a positivist research philosophy and deductive approach to theory building were adopted, which is in line with the quantitative nature of this study. In addition, a survey research strategy was used and the study was cross-sectional in nature. The measuring instrument, which was in the form of a self-administered online questionnaire, was subjected to a pilot study. Minor adjustments were made to the questionnaire before an electronic link to the final version, accompanied by a cover letter, was e-mailed to 8 496 potential respondents. These potential respondents, who were identified using a convenience sampling technique, were likely to participate in knowledge-intensive teams and be representative of the population. A total of 384 usable responses were received. Following the data collection, the data were analysed to examine the proposed relationships as depicted in the hypothesised model. To address possible multicollinearity concerns associated with different variables that belong to a shared category, such variables were first combined into a single hierarchical variable. Thereafter, a confirmatory factor analysis (CFA) was performed on each factor that confirmed the factor structures by using various goodness-of-fit indices. Subsequent to the CFAs, the validity and reliability of the measuring instrument was assessed. The reliability of the measuring instrument was evaluated using Cronbach’s alpha coefficients, while the assessment of validity involved calculations of the average variance extracted (AVE) estimates and squared correlations between constructs. Based on the results of the reliability and validity assessments, the hypothesised model was revised accordingly. The revised model included Team development competition, Team psychological safety, Cultural intelligence, Team commitment and Perceived deep-level diversity as the independent variables influencing Intra-team knowledge-sharing behaviour. Descriptive statistics and correlation results were presented on the constructs in the revised hypothesised model, while a structural equation modelling (SEM) analysis was the main statistical technique used to test the significance of the relationships between the dependent and the independent variables. The relationships between selected demographic variables and Intra-team knowledge-sharing behaviour were assessed by means of general linear modelling (GLM), a subset of SEM. In light of these analyses, it was concluded that Team psychological safety, Team development competition, Cultural intelligence and Age have a significant influence on Intra-team knowledge-sharing behaviour and could thus be seen as predictors or determinants thereof. Of all the significant relationships identified in this study, Team psychological safety had the strongest effect on Intra-team knowledge-sharing behaviour. One should, however, not lose sight of the impact that competition and cultural intelligence could have on the knowledge-sharing behaviour of individual members participating in knowledge-intensive teams. This study contributes to the body of knowledge-sharing research in general, but also to knowledge-sharing behaviour in a team context in particular. Besides the theoretical contributions, this study makes several practical recommendations to knowledgeintensive businesses on how to manage the team-related factors influencing the Intrateam knowledge-sharing behaviour of individual members participating in knowledgeintensive teams. These recommendations could possibly enhance the competitive advantage of knowledge-intensive businesses. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
The effect of silicon on palladium migration in pyrolytic carbon and graphite
- Authors: Downey, Justin Michael
- 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/10948/53665 , vital:45684
- Description: The pebble-bed reactor (PBR) is a graphite-moderated, gas-cooled high temperature nuclear reactor design and it is one of six nuclear reactor concepts included in the Generation IV initiative. Pebble-bed reactors use spherical fuel elements (called pebbles) which consist of pyrolytic graphite (which acts as the moderator) and contain thousands of micro-fuel particles called tristructural isotropic (TRISO) particles. These TRISO fuel particles consist of a fissile material (such as U235 in oxide or carbide form) surrounded by a carbon buffer layer, a pyrolytic carbon (PyC) layer, a silicon carbide (SiC) ceramic layer for structural integrity and metallic fission product containment, and an outer PyC layer. The PBR is claimed to be a passively safe design. The commercial development of the first pebble bed reactor was that of the German AVR reactor (German: Arbeitsgemeinschaft Versuchsreaktor) developed during the 1960s. The AVR design was later updated and marketed by a company called HTR. In 1999 the South African electricity company ESKOM obtained the right to access the HTR engineering database that included details of the Siemens/Interatom HTR-Module design. ESKOM worked with HTR on a new design and dubbed it the pebble bed modular reactor (PBMR). The PBMR Co. Ltd. was formed in 1999 and mandated to license and build PBMR reactors. One of the safety considerations which emerged from research is that of metal fission product release from the TRISO fuel particles. Ag110m is a radioactive metallic fission product found to have been released from intact TRISO particles. The release of this Ag isotope is of particular concern because it is highly gamma active and has a half-life of approximately 250 days, resulting in unsafe environments for maintenance workers of PBRs. During the past four decades, many different mechanisms for Ag transport in SiC and release from TRISO particles have been proposed. A promising more recent mechanism suggests that the metallic fission product palladium (Pd) plays a significant role in the transport and release of Ag from intact TRISO particles. In this mechanism Ag transport in irradiated TRISO particle fuel takes place in the presence of the fission product Pd. The Pd reacts with the SiC layer and penetrates the SiC layer along grain boundaries to form a silicide layer which provides a rapid diffusion path for Ag in the SiC. The presence of thin silicide layers in irradiated TRISO particles was subsequently confirmed. , Thesis (PhD) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
- Full Text: false
- Date Issued: 2021-12
- Authors: Downey, Justin Michael
- 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/10948/53665 , vital:45684
- Description: The pebble-bed reactor (PBR) is a graphite-moderated, gas-cooled high temperature nuclear reactor design and it is one of six nuclear reactor concepts included in the Generation IV initiative. Pebble-bed reactors use spherical fuel elements (called pebbles) which consist of pyrolytic graphite (which acts as the moderator) and contain thousands of micro-fuel particles called tristructural isotropic (TRISO) particles. These TRISO fuel particles consist of a fissile material (such as U235 in oxide or carbide form) surrounded by a carbon buffer layer, a pyrolytic carbon (PyC) layer, a silicon carbide (SiC) ceramic layer for structural integrity and metallic fission product containment, and an outer PyC layer. The PBR is claimed to be a passively safe design. The commercial development of the first pebble bed reactor was that of the German AVR reactor (German: Arbeitsgemeinschaft Versuchsreaktor) developed during the 1960s. The AVR design was later updated and marketed by a company called HTR. In 1999 the South African electricity company ESKOM obtained the right to access the HTR engineering database that included details of the Siemens/Interatom HTR-Module design. ESKOM worked with HTR on a new design and dubbed it the pebble bed modular reactor (PBMR). The PBMR Co. Ltd. was formed in 1999 and mandated to license and build PBMR reactors. One of the safety considerations which emerged from research is that of metal fission product release from the TRISO fuel particles. Ag110m is a radioactive metallic fission product found to have been released from intact TRISO particles. The release of this Ag isotope is of particular concern because it is highly gamma active and has a half-life of approximately 250 days, resulting in unsafe environments for maintenance workers of PBRs. During the past four decades, many different mechanisms for Ag transport in SiC and release from TRISO particles have been proposed. A promising more recent mechanism suggests that the metallic fission product palladium (Pd) plays a significant role in the transport and release of Ag from intact TRISO particles. In this mechanism Ag transport in irradiated TRISO particle fuel takes place in the presence of the fission product Pd. The Pd reacts with the SiC layer and penetrates the SiC layer along grain boundaries to form a silicide layer which provides a rapid diffusion path for Ag in the SiC. The presence of thin silicide layers in irradiated TRISO particles was subsequently confirmed. , Thesis (PhD) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2021
- Full Text: false
- Date Issued: 2021-12
The impact of exchange rates on trade balances in SADC countries
- Authors: Nyahokwe, Olivia
- Date: 2021-12
- Subjects: Foreign exchange rates -- Africa, Southern
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54980 , vital:48575
- Description: This study aims to determine the impact of exchange rates on trade balances in SADC countries. Further, the study also aims to determine the existence of the J-curve phenomena in SADC countries. To achieve the objectives of the study, a panel GMM model and quantile regressions were used as a method of data analysis on data covering the period of 1993 to 2018. Panel GMM model and quantile regression were used to determine the relationships between the real exchange rate (XR), world income (WGDP), as well as gross domestic product (GDP), and trade balance (TB) of SADC countries. The SADC countries used in this study are South Africa, Mauritius, Lesotho, Angola, Malawi, Mozambique, DRC, Madagascar, Namibia, and Botswana. To provide a conceptual framework for the study, a comprehensive theoretical and empirical literature review was undertaken. Within the framework of the theoretical literature review, Magee’s (1973) J-curve phenomena were tested for its relevance and application within SADC countries. Given the main highlights of the empirical literature review, this J-curve phenomenon as well as the impact of trade balances in SADC countries, has not been addressed optimally. The main focus of previous studies in this area within SADC countries has fallen short of explaining the nature and causality of J-curve phenomena. It is in this respect that this study contributes to the regional and international trade discourse. The main findings from the quantile regression analysis in this study suggest that no evidence of "J-curve" in the case of Angola, Namibia, Mozambique, Malawi, and Madagascar. South Africa shows a delayed J curve. Lesotho an inverted J-curve, whilst DRC and Botswana show a sharp V-shape. Contrary to the "J-curve" phenomenon, as explained by the classical textbooks, the findings of the study suggest that the depreciation of Namibia, Mozambique, Angola, Malawi, and Madagascar’s exchange rates produce no J-curve phenomenon, indicating that there is no room for improving these countries’ trade balances through a currency devaluation process. Yet for countries such as South Africa, DRC, Botswana, and Mauritius the findings suggest that the depreciation of these countries’ exchange rates improves the trade balances. Concerning GMM results, the exchange rate and gross domestic product in SADC countries had a positive relationship with the trade balances in SADC countries. Further, the exchange rates also show evidence of a positive relationship with trade balances. On the contrary, the world income (represented as world GDP) has a negative relationship with trade balances in SADC countries. This implies that, as SADC currencies strengthen, the trade balance worsens. This finding presents a serious open macroeconomic challenge in SADC countries, in that the trade balances worsen irrespective of the strengths of the currencies; hence the trade balances in SADC countries have remained negative for prolonged periods. Furthermore, the world economic growth does not necessarily improve the SADC countries' trade balances either, as shown by a negative relation between world income and trade balances in SADC countries. This finding concerning world GDP, suggests that SADC countries lack export diversification and are trapped in primary product exports which, at times, are subjected to low prices. Given the above findings, it is clear that SADC countries will continue to suffer from negative trade balances, which in turn will continue to stifle their growth. To address the continued and persistent trade balances in SADC countries, policymakers should focus on an integrated open macroeconomic strategy. Such a strategy should pay special attention to improving technical skills, research, and development, quality of exports, export diversification, infrastructure; maintain the use of flexible exchange rate regimes, raise the level of productivity; substitute imports of capital equipment and support domestic industries. Furthermore, it is recommended that SADC countries focus on attracting and retaining foreign direct investments. This macroeconomic strategy should not be approached in isolation but as an integrated policy framework. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Nyahokwe, Olivia
- Date: 2021-12
- Subjects: Foreign exchange rates -- Africa, Southern
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54980 , vital:48575
- Description: This study aims to determine the impact of exchange rates on trade balances in SADC countries. Further, the study also aims to determine the existence of the J-curve phenomena in SADC countries. To achieve the objectives of the study, a panel GMM model and quantile regressions were used as a method of data analysis on data covering the period of 1993 to 2018. Panel GMM model and quantile regression were used to determine the relationships between the real exchange rate (XR), world income (WGDP), as well as gross domestic product (GDP), and trade balance (TB) of SADC countries. The SADC countries used in this study are South Africa, Mauritius, Lesotho, Angola, Malawi, Mozambique, DRC, Madagascar, Namibia, and Botswana. To provide a conceptual framework for the study, a comprehensive theoretical and empirical literature review was undertaken. Within the framework of the theoretical literature review, Magee’s (1973) J-curve phenomena were tested for its relevance and application within SADC countries. Given the main highlights of the empirical literature review, this J-curve phenomenon as well as the impact of trade balances in SADC countries, has not been addressed optimally. The main focus of previous studies in this area within SADC countries has fallen short of explaining the nature and causality of J-curve phenomena. It is in this respect that this study contributes to the regional and international trade discourse. The main findings from the quantile regression analysis in this study suggest that no evidence of "J-curve" in the case of Angola, Namibia, Mozambique, Malawi, and Madagascar. South Africa shows a delayed J curve. Lesotho an inverted J-curve, whilst DRC and Botswana show a sharp V-shape. Contrary to the "J-curve" phenomenon, as explained by the classical textbooks, the findings of the study suggest that the depreciation of Namibia, Mozambique, Angola, Malawi, and Madagascar’s exchange rates produce no J-curve phenomenon, indicating that there is no room for improving these countries’ trade balances through a currency devaluation process. Yet for countries such as South Africa, DRC, Botswana, and Mauritius the findings suggest that the depreciation of these countries’ exchange rates improves the trade balances. Concerning GMM results, the exchange rate and gross domestic product in SADC countries had a positive relationship with the trade balances in SADC countries. Further, the exchange rates also show evidence of a positive relationship with trade balances. On the contrary, the world income (represented as world GDP) has a negative relationship with trade balances in SADC countries. This implies that, as SADC currencies strengthen, the trade balance worsens. This finding presents a serious open macroeconomic challenge in SADC countries, in that the trade balances worsen irrespective of the strengths of the currencies; hence the trade balances in SADC countries have remained negative for prolonged periods. Furthermore, the world economic growth does not necessarily improve the SADC countries' trade balances either, as shown by a negative relation between world income and trade balances in SADC countries. This finding concerning world GDP, suggests that SADC countries lack export diversification and are trapped in primary product exports which, at times, are subjected to low prices. Given the above findings, it is clear that SADC countries will continue to suffer from negative trade balances, which in turn will continue to stifle their growth. To address the continued and persistent trade balances in SADC countries, policymakers should focus on an integrated open macroeconomic strategy. Such a strategy should pay special attention to improving technical skills, research, and development, quality of exports, export diversification, infrastructure; maintain the use of flexible exchange rate regimes, raise the level of productivity; substitute imports of capital equipment and support domestic industries. Furthermore, it is recommended that SADC countries focus on attracting and retaining foreign direct investments. This macroeconomic strategy should not be approached in isolation but as an integrated policy framework. , Thesis (PhD) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12