A multidisciplinary study to assess the ecology of the Cape sea urchin, Parechinus angulosus, and its emerging use as a bioindicator to monitor coastal resiliency
- Authors: Redelinghuys, Suzanne
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/435691 , vital:73179 , DOI 10.21504/10962/435692
- Description: The resilience of marine species in the face of unpredictable climate change stands as a paramount concern for the maintenance of ecological stability. Under such fluctuating conditions, it is critical to understand how organisms mitigate these effects in physiological, genetic, and morphological terms. To that end, this thesis focused on the Cape sea urchin, Parechinus angulosus, employing a multidisciplinary approach encompassing morphology, genomics, and gut microbial diversity to assess its potential as a bioindicator species and elucidate its adaptive strategies in response to varying environmental conditions along the South African coastline. This was achieved through studying their anatomy in order to link observed variation to prevailing local environmental conditions, aided by the species’ wide distribution range which allows insight into adaptations across broad geographic regions and ecological settings. The first empirical chapter, Chapter 3, focusing on eight key morphometric traits of test, Aristotle’s lantern and spines, revealed distinct variation in the Cape sea urchin's morphology between the east and west coasts of South Africa, suggesting the presence of some level of local adaptation to the prevailing environmental factors found on the east and west coasts of South Africa. This points to potential bioindicator capabilities of the species, reflecting adaptive divergence amidst contrasting environmental conditions. Further analysis is however necessary in order to isolate specific physiological trends that may be associated with these morphometric differences, thereby enhancing and tightening their ecological implications. The second experimental chapter, Chapter 4, delved into the genetic structure of the Cape urchin by investigating genome-wide diversity, the presence of cryptic population structure, and spatial patterns of genomic diversity. Moderate genomic differentiation was detected among populations along the eastern and western coasts of South Africa by outlier loci that may undergo natural selection, which could indicate local adaptation to environmental conditions. This pattern hints at adaptive differentiation and cryptic genetic structures within the Cape sea urchin populations and emphasises the species' potential adaptive responses to localised (in this case regional) environmental pressures. Assigning functional significance to these genetic variations will require a comprehensive annotated reference genome, a limitation acknowledged in the current study. Chapter 5 explored the gut microbial diversity and revealed significant compositional variations between the east and west coast populations of South Africa, confirming regional and inter-regional variation. This chapter also highlighted the essential biochemical pathways critical to the survival of the host which is crucial for assessing the health of the urchin host. Together, the functional content of the gut bacteria and microbial diversity showcases its potential as a bioindicator for coastal ecosystem health. Logistical challenges and confounding factors like host physiology will need to be fully considered for its effective application. Overall, the findings of this doctoral research suggest that the Cape sea urchin displays promising characteristics as a bioindicator species due to its morphological, genetic, and gut microbial variations in response to environmental differences, providing a diverse array of means in which urchins could be used as bioindicators, from their uses to assess water quality and detect pollution, to ecosystem health monitoring and biodiversity studies in which sea urchin abundance, distribution, and presence are monitored. Further research, integrating these multidisciplinary approaches is recommended to validate and refine its bioindicator potential. Additionally, the development of a comprehensive annotated reference genome is imperative to harness the species' genetic information effectively. This study underscores the significance of integrating multiple disciplines in understanding how species respond to environmental change and their potentials contributions to monitor ecological resilience. The original multidisciplinary approach, combined with high computational outputs presents a promising framework for a comprehensive ecological monitoring in marine ecosystems. , Thesis (PhD) -- Faculty of Science, Zoology and Entomology, 2024
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- Date Issued: 2024-04-05
Augmentation of Aphytis melinus DeBach (Hymenoptera: Aphelinidae) for the control of California red scale Aonidiella aurantii Maskell (Hemiptera: Diaspididae) on citrus
- Authors: De Beer, Ernst Friedrich Ludwig
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/435638 , vital:73175 , DOI 10.21504/10962/435638
- Description: Aphytis lingnanensis was reared and tested in South Africa in the early 2000s for augmentation against red scale on citrus and was found to be ineffective. Aphytis melinus is now commercially available and it is important that the efficacy of augmentation thereof on red scale is determined locally. Field trials, fitness assessments and molecular identification on A. melinus from two insectaries were done. Field trials was done in seven, five and six pairs of comparable release and control orchards across the Eastern and Western Cape during the seasons of 2019/2020, 2020/2021 and 2021/2022 respectively. Red scale infestation was monitored and a sample of 20 infested fruit from each orchard was randomly collected every four weeks. Aphytis spp. responsible for parasitism were identified and the percentage parasitism recorded. Results of this study of field trials suggest that the augmentation of A. melinus did not significantly increase the level of parasitism above that of the untreated control. Five repetitions with six replicates of flight and longevity tests were performed with wasps from each insectary. Wasps in the longevity test from two insectaries were kept at 23 °C and 65% RH with honey. Flight tests were performed in tubes of 16 by 30 cm, with a light above a clear, sticky ceiling at 23 °C and 65% RH. On average in five replicates, 65%, 33% and 17% A. melinus wasps were alive on day one, five and 10 respectively. The overall sex ratio was 1.58 for females to males, but 1.05, 2.19 and 2.66 for non-flyers, non-crawlers, crawlers, and flyers respectively. In flight tests for both insectaries combined, only 36.97% of wasps could initiate flight in 24 h while 56.96% remained on the tube floor, and 6.05% attempted to crawl upwards. No significant differences in flight performance were recorded between the two insectaries. Wasps from the local insectary lived significantly longer during the longevity tests but were shorter in transit than wasps from the overseas insectary. COI genes were sequenced and compared against Genbank sequences using BLAST. Molecular identifications did not confirm morphological identifications for all species, indicating unexpected genetic complexity. , Thesis (PhD) -- Faculty of Science, Zoology and Entomology, 2024
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- Date Issued: 2024-04-05
Investigating occupation as frame for planning and developing agricultural extension VET skills for climate resilience: cross-case analysis of Alice, South Africa, and Gulu, Uganda
- Authors: Muhangi, Sidney
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/436559 , vital:73282 , DOI 10.21504/10962/436559
- Description: In sub-Saharan Africa and most of the Global South, climate change is challenging work and livelihoods for smallholder farmers who depend on rainfed farming, demanding climate resilience. Smallholder agriculture in Africa remains a mainstay for most economies and livelihoods, including South Africa and Uganda. My firsthand experience in Uganda as a subsistence farmer revealed the vitality of extension services to farmers. Participating in VETAfrica 4.0, a VET skill planning project, sparked my interest in examining the adequacy of 'Occupation' as a skills planning tool for addressing contemporary climate change challenges faced by extension officers and farmers, with implications for skills development. This research sought to answer the question: What is the theoretical and practical history and current constitution of the agricultural extension officer occupation as a mediating unit of intervention for VET skills planning, and is it adequate for climate resilience? The study addressed five objectives. First, the study undertook a historical review of occupation as a mediating unit of intervention for skills planning. Secondly, the study examined current descriptions of the extension occupation as used for skills planning in Africa. Thirdly, in order to better understand the operationalisation of this skills planning instrument, the study examined aspects of skills development, specifically how VET preparation for extension work was taking place in response to the need for climate resilience through a curriculum review and the experiences and related work activities of extension services actors. The study also reviewed agricultural extension and VET policy, and labour market data for its responsiveness to climate resilience. In response to the findings of Objectives 1-4, a fifth objective was developed to offer expanded possibilities for a mediating unit of intervention for skills planning and development relevant to climate resilience in agricultural extension, as this appeared to be needed. To develop the study, I drew on the Social Ecosystems Model (SEM) for skills, which raises the issue of mediation in skills development. I also drew on Cultural-Historical Activity Theory (CHAT) to help theorise the mediation in the SEM for skills, where different activity systems (policy, training and extension, farming) were present. This framework allowed me to probe how these activity systems were mediating climate-resilient skills development with/for extension services (or not). Empirical data was produced through secondary and primary data, generated in two case study contexts using a cross-case design. Documentary analysis involved analysing policy documents, study curricula and historical literature to develop an understanding of historical sociology of occupation as a skills planning mediating unit and insight into contemporary understanding of how occupational frameworks are structured and deployed. Analysis was undertaken in two stages; firstly, through in-depth cases of occupation as mediating unit of intervention for skills planning, and aspects of skills development as influenced by this as influenced by this mediating unit (Chapter 5 and 6). This offered a first layer of analysis and insights into temporality, verticalities, mediation and horizontalities in the SEM for skills in each case. Secondly, abduction was undertaken to build models of the SEM for skills as found in each of the two countries using the SEM and CHAT analytical tools (Chapter 7), showing the need for skills planning tools that are more closely related to and relevant to the contexts of skills development. Findings revealed insights into the SEM for skills related to ecological time, notably a mismatch between the cultural-historical time of occupational skills planning and development, and the temporal demands for climate resilience. Historical analysis the deep rootedness of occupations and occupational structures in colonial histories and traditions, going back as far as the medieval era, with current occupations still bearing features of ancient occupational guild practices and hence not adequately responsive to climate change, affecting the SEM for skills in both cases and producing contradictions. Analysis further revealed that contemporary agricultural extension in Africa is decentralised and pluralistic, with few extension-related policies employed underdeveloped. Labour market in both South Africa and Uganda are not adequately orientated to climate resilience and fail to include climate resilience expertise, despite a need for this amongst farmers and by policy, revealing contradictions between various policy activity systems, which are not adequately facilitating. Empirical findings from study sites revealed that VET preparation for extension work lacks responsiveness to climate resilience within the skills ecosystem. Consequently, extension officers lack expertise in climate resilience, which is an increasing demand expressed by farmers and other horizontal activity systems in the SEM for skills. Through a more complex understanding of the extension officer occupation and its development in skills ecosystem in Africa, the study proposes a broader mediating unit of intervention for skills planning than that of ‘occupation’ only. The mediating unit of intervention put forward for skills planning is a workstream mapping approach for climate resilient extension training in VET. This planning approach has implications for skills development viewed as work, learning and living involving more than one activity system in the skills development landscape, thus also broadening the approach to VET. The study concludes with recommendations to further test this approach. Finally, it makes recommendations that can inform: 1) curriculum innovation, 2) extension practice, 3) policy, and 4) research. , Thesis (PhD) -- Faculty of Education, Secondary and Post School Education, 2024
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- Date Issued: 2024-04-05
Phthalocyanine-based bio-functional conjugates: photodynamic therapy and photoantimicrobial chemotherapeutic efficacy evaluation in-vitro
- Authors: Magadla, Aviwe
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/435918 , vital:73212 , DOI 10.21504/10962/435918
- Description: This thesis reports on the syntheses and characterisation of symmetrical and asymmetrical phthalocyanines (Pcs) with different ring substituents derived to form either cationic styryl pyridine, cationic styryl pyridine triphenylphosphonium (TPP+)-based, benzothiazole, cationic pyridyl-dihydrothiazole and other closely related groups. The starting Pc complex of the synthesised Pc derivatives was typically obtained through the cyclotetramerisation of a substituted phthalonitrile. Then, depending on the desired final complex, the desired complexes were synthesised through the Knoevenagel condensation, alkylation reaction, and Schiff base reaction. Furthermore, silica nanoparticles (SiNPs) were also used to encapsulate Pcs. Following aminopropyl triethoxysilane amino (APTES) functionalisation of the surface of the Pc@SiNPs-APTES, biomolecules such as gallic acid, folic acid, and ampicillin were covalently attached to the surface. Additionally, Pc@SiNPs-APTES is protonated with 1,3-propanesultone. The pair of synthesised asymmetric Pcs is attached to ciprofloxacin (CIP) via an amide bond. Different analytical methods were used to characterise the Pcs and their conjugates. The photophysics and photochemistry of the Pcs both by themselves and in their conjugate form when doped with SiNPs. The cationic Pcs were able to produce sufficient singlet oxygen on their own in most cases. This is explained by the Pcs greater solubility in water. Since singlet oxygen is produced from the triplet state, singlet oxygen quantum yield (Δ) values complement triplet quantum yield (T) values. Low Δ values could be attributed to ineffective energy transfer; screening effects may have prevented the excited triplet state of the Pcs from interacting with the ground state molecular oxygen, lowering the Δ values. In other instances, the Pcs' protection by the SiNPs could be credited with extending the triplet lifetime. The direct connection of Pcs with CIP increased the formation of T and Δ in ABSTRACT comparison to Pcs alone. Both in planktonic and biofilm form, the cationic Pcs and conjugates showed enhanced bacterial elimination. The Pcs and conjugates demonstrated significant activity in photodynamic therapy treatment (PDT) experiments at the tested doses. In both PDT and photodynamic antimicrobial chemotherapy (PACT) treatment, the cationic Pcs outperformed the neutral Pc in terms of biological activity. , Thesis (PhD) -- Faculty of Science, Chemistry, 2024
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- Date Issued: 2024-04-05
Plankton and macroinvertebrate dynamics in the Khakhea–Bray transboundary aquifer region
- Authors: Mungenge, Chipo Perseverance
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/435674 , vital:73178 , DOI 10.21504/10962/435674
- Description: Temporary wetlands are prevalent in semi–arid and arid climates across the globe and harbour unique faunal assemblages that significantly contribute to regional aquatic biodiversity. This study aims to enhance our understanding of the ecological dynamics of temporary wetland ecosystems, focusing on plankton dynamics, large branchiopod diversity, trophic dynamics, water quality and the impacts of freshwater salinisation in temporary pans in the Khakhea Bray Transboundary aquifer region in the North west Province, South Africa. This body of work represents field, laboratory and writing components which span the period May 2021 to December 2023. The results from this study revealed seasonal patterns in plankton diversity with a winter peak in phytoplankton diversity dominated by Zygnematophyceae species, while Chlorophyceae were dominant in summer. Zooplankton diversity was high in summer as compared to winter, with both Rotifera and Copepoda dominant in both seasons. Six large branchiopod species were found in the region, and three of these were new distribution records for the North west Province, including the first record of Phallocryptus spinosa in the salt pan that was sampled in summer. Large branchiopod diversity was mainly influenced by water temperature and phosphorous in summer, while sediment sodium influenced the diversity in winter. The stable isotope analyses used to determine trophic dynamics in these temporary pans revealed that the food web had four trophic levels, with the top predators being the notonectids Anisops sp. The dominant consumers were predatory insects such as Sigara sp., Anisops sp., Lestes sp., Rhantus sp. and Cybister sp. adults and larvae, as well as detritivorous Tomopterna sp. tadpoles. High trophic niche overlaps were found between the notonectids and the dytiscids. These temporary pans are susceptible to anthropogenic impacts, and disturbed pans were found to have elevated pH, ammonium, phosphates and dissolved oxygen compared to the undisturbed pans. A strong positive relationship was observed between chl–a and temperature, pH, dissolved oxygen, phosphates and ammonium. Chlorophyll–a concentration increased as surface area and the distance from kraals, buildings and latrines decreased. Freshwater salinisation was found to cause notable shifts in abiotic factors and benthic phytoplankton communities, favouring the proliferation of saline–tolerant diatom species at the cost of more sensitive taxa. The study also revealed that in interaction with salinisation, time also exerted a notable influence on shaping the benthic phytoplankton community. Salinity levels of 2.5 ppt and above led to significant decreases in emergent taxa richness and abundance, with Spinicaudata and Ostracoda being the most sensitive taxa to high salinities. There was a limited effect on community hatching phenology dynamics from salinity. This suggests that the main impact of salinisation in these systems will be reductions in hatching success and, hence, reduced recruitment. The study highlights the vulnerability of temporary pan ecosystems to anthropogenic influences and the complexities of interactions of organisms and the environmental conditions in these systems. , Thesis (PhD) -- Faculty of Science, Zoology and Entomology, 2024
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- Date Issued: 2024-04-05
Case in modern standard Arabic
- Authors: Ghammaz, Hamzah Saleh Theyab
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/435593 , vital:73171 , DOI 10.21504/10962/435593
- Description: This thesis provides a novel account of case checking in Modern Standard Arabic (henceforth MSA). It argues against the concept that nominative case in topic and comment structures is default. Default or inherent case is not related to case filter, nor is it assigned by any syntactic method. Some linguists claim that the default case in Arabic language is employed only when no case assigner is available. I argue, in light of the minimalist program (henceforth MP), that default (inherent) case is always a problem for syntactic theory and that the nominative case which the topic and comment sentences bear is valued by a functional head. The topic and comment constructions contain a predicational head (Pred)- a functional head, that is equivalent to vP which occurs in verbal constructions. The head of PredP is accountable for nominative case value on the topic and comment structures. This thesis also provides a novel paradigm regarding the clitics that appear at the end of verbs in MSA. This paradigm proves that these clitics are not agreement, tense, nor mood markers but rather Verbal Case markers and it provides a minimalist program account to explain case checking on verbs in MSA. Regarding sentence initial DP, and contra to the proposal that in SVO sentence initial DP is a subject, I have scrutinised the nature of this DP and provided enough evidence that it is a topic. Additionally, I have investigated the relationship between agreement asymmetry and the position of the subject in MSA from the minimalist feature inheritance account viewpoint. Mainly, I reviewed null pro hypothesis which proved to be redundant to account for the derivation of VSO or SVO word orders. I have also proved what were considered agreement markers are not agreement markers but resumptive pronouns. Finally, I proved that there is not agreement asymmetry in MSA. Agreement pattern in MSA results from the agree operation and it is achieved under Probe-Goal alignment; regardless of whether the Goal is raised up to Spec-TP or remains in situ (Spec-VP), the agreement is not supposed to change. This conclusion is in harmony with the principles of MP Agree Theory. , Thesis (PhD) -- Humanities, Linguistics and Applied Language Studies, 2024
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- Date Issued: 2024-04-04
A critical analysis of the factors influencing knowledge sharing in Indian family owned businesses in South Africa
- Authors: Sha, Shafeek
- Date: 2024-04-03
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/434817 , vital:73107 , DOI 10.21504/10962/434817
- Description: It is commonly believed that family businesses have formed the backbone of many economies around the globe and that they have been the predominant form of enterprise that has given rise to some of the most famous multinational enterprises. Family businesses contribute to the wealth creation in most economies and conservative estimates suggest that 65% to 80% of all businesses worldwide are owned and managed by families. In South Africa, Indian family owned businesses contribute more to employment than any other family business. There is a general perception amongst South Africans that Indian family owned businesses are more successful and that this success is continued from one generation to the next. Intrigued by this “phenomenon” for many years, the researcher decided to investigate it. The perspective adopted for this research was to look at the research problem from a knowledge management discipline viewpoint, in general, with a specific focus on knowledge sharing and Indian family owned businesses. The purpose of this study is to critically analyse the factors that influence the effectiveness of knowledge sharing in Indian family owned businesses. So the research answered the question: How do Indian family owned businesses in South Africa share their knowledge to ensure the continued success of their businesses through succeeding generations? A positivist research paradigm and philosophy was adopted for this research together with a quantitative research approach using survey research as the research strategy of choice. After conducting an extensive literature review, the next step was to develop and formulate a theoretical model, and flowing from the model and prior research, a research instrument was developed and administered to a qualifying sample of Indian family owned businesses in South Africa. Structural equation modelling was used as the principal mode of statistical analysis to measure the relationships amongst the variables in the model proposed in this study. After analysing the empirical data, the following key factors were identified as statistically significant in being determinants of knowledge sharing in Indian family owned businesses in South Africa: organisational culture, learning organisation, and leadership. These findings serve to contribute to the existing literature within the fields of knowledge management and family business. This study will richly contribute to research-based evidence of the factors that influence knowledge sharing in Indian family owned businesses. The outcomes will allow existing and emerging family businesses to ensure the future success of their enterprises from one generation to the next by embracing the empirical findings of this research and thus ultimately contribute to the future success of the family business as a whole. , Thesis (PhD) -- Faculty of Commerce, Management, 2024
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- Date Issued: 2024-04-03
A framework to improve supply chain performance through lead time management in Ugandan public health institutions
- Authors: Kabagenyi, Dorothy
- Date: 2023-12
- Subjects: Lean manufacturing -- Management , Business logistics -- Uganda , Medical care -- Uganda , Industrial procurement Inventory control
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/65633 , vital:74213
- Description: A well-organised public healthcare supply chain leads to easy accessibility of medical supplies. In order to have healthy populations, it is important for governments to have the required medical supplies in their healthcare facilities at the required time. As such, appropriate lead time management by supply chain actors greatly improves supply chain performance. However, the current public healthcare supply chains in Uganda have challenges that lead to poor quality and inefficient public health supply chain performance. The primary objective of this study was to develop an implementation framework to guide public health institutions in improving supply chain performance through lead time management in Uganda. The study also sought to determine the influence of supply chain optimisation on lead time management. It also sought to examine the influence of supply chain dynamic capabilities on lead time management. The study further examined the influence of supplier performance on lead time management, and sought to examine the influence of lead time management on supply chain performance. The study also sought to assess the mediating effect of lead time management on the relationship between supply chain dynamic capabilities and overall supply chain performance, between supply chain optimisation and overall supply chain performance, as well as between supplier performance and overall supply chain performance. Lastly, the study sought to assess the mediation effect of supply chain optimisation on the relationship between supplier performance and lead time management as well as between supply chain dynamic capabilities and lead time management. A positivist philosophy that allowed quantitative data to be collected from 340 respondents was used in this study. The study used both stratified sampling and simple random sampling without replacement to choose the public healthcare facilities as well as purposive sampling to select the final respondents for the study. An exploratory factor analysis (EFA) was performed in the Statistical Package for Social Sciences (SPSS) Version 25 for factor reduction and dimensional groupings. Confirmatory factor analysis (CFA) and structural equation modeling (SEM) path analysis models were performed in the Analysis of Moments of Structure (AMOS Version 27) software for model fit assessments and hypotheses testing, respectively. A multiple regression analysis was performed in SPSS Version 25 software, and was used for comparison and confirmation of the weak and insignificant result obtained for the unsupported hypothesis (H4) in the SEM hypotheses tests. , Thesis (PhD) -- Faculty of Business and Economic Sciences, School of Management Sciences, 2023
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- Date Issued: 2023-12
An alternative model for the financial sustainability of social services sector NGOs in the Eastern Cape, South Africa
- Authors: Kagande, Albert Tafadzwa
- Date: 2023-12
- Subjects: Non-governmental organizations -- South Africa , Accounting -- Social aspects , Sustainability
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/65644 , vital:74217
- Description: The work of Non-Governmental Organisations (NGOs) is traditionally deemed “unprofitable”, yet they provide valuable services to communities. With an exponentially growing NGO sector of more than 270 000 NGOs, of which 40% are social service sector NGOs, and an increased demand for NGO services, a decrease in government and donor funding has heightened the debate on the need for financial sustainability of NGOs in South Africa. NGOs are important development actors, and their financial sustainability is crucial as it ensures that the sector continues to be relevant and effective in ensuring that social needs are met. Using a mixed methods sequential explanatory research design, the study focused on the social services sector NGOs in the Eastern Cape with the aim of understanding their financial challenges and strategies being employed to address such and, in the process, develop an alternative model for the financial sustainability of these NGOs. A conceptual framework was developed from six theories which were used to explore the concept of financial sustainability drawing insights from the internal and external environment of the participating NGOs. These theories were used together to emphasise that no one theory could single-handedly and holistically explain the concept of the financial sustainability of social service sector NGOs. The use of multiple theories also came from the realisation that NGOs in South Africa, in general, are struggling to survive owing to a myriad of factors which include increased competition for resources and reduced funding from their traditional source. Furthermore, donor dependency, staff and organisational capacity, management practices and values, and the interplay of an NGO with its stakeholders and environment all have a bearing on financial sustainability. Being the poorest province in South Africa heightens the need for social services in the Eastern Cape. From the study, it was established that 48% of social services sector NGOs depended on government funding while only 16% had the capacity to generate their own income. However, depending on government funding was not sustainable and this was crippling the social services sector. The study also established that “young” NGOs struggled to secure funding when compared to their “mature” counterparts. In addition, staff capacity and the values of an organisation affected income generation and how funds were sourced. Lack of capacity to fundraise and/or implement commercial activities had affected the financial sustainability of the social sector NGOs. The interplay of an NGO and its stakeholders and environment also had a bearing on the financial sustainability of the sector. The study provides a multipronged approach and perspective to financial sustainability. The proposed financial sustainability model challenges social services sector NGOs to consciously reflect on their internal and external environments as well a come up with strategies that positively affect their financial sustainability. From the study, the strategies that were being implemented to realise financially sustainability included, retaining current donors, reaching out to new donors, innovative fundraising approaches, redesigning programme activities to include cost-recovery components, collaborating with other NGOs as well as commercial ventures. This study concludes that social services sector NGOs need all these approaches in addition to improving staff capacity and adopting a culture that enhances organisational performance. There is need to build a system where NGOs are adequately supported to do their work without worrying about income and where well-designed financial sustainability components help NGOs, funders, government and communities identify where change is needed. , Thesis (DPhil) -- Faculty of Business and Economic Sciences, School of Economics, Development and Tourism, 2023
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- Date Issued: 2023-12
An application of the Mundell Fleming model in emerging market economies
- Authors: Tenderere, Morris
- Date: 2023-12
- Subjects: Macroeconomics , Foreign exchange rates , International economic relations
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/66039 , vital:74319
- Description: The core objective of this study was to test the applicability of the Mundell-Fleming model in emerging market economies. Despite its importance, no study has examined the applicability of the Mundell-Fleming model in emerging market economies, as far as this study is aware. The Mundell-Fleming model predicts that in an environment with freely floating exchange rates, a drop in interest rates will lead to capital flight, which in turn will result in a fall in the exchange rate and a rise in net exports. The model takes into account both the international flow of capital and the flow of goods and services that might have a big impact on the country. The model's theoretical foundations offer practical instruments for assessing the impact of economic policy in light of the adopted exchange rate regimes of a nation. The model plays a key role in anticipating the link between output, interest rates, and exchange rates. A quantitative approach using panel monthly data over the period 2000 to 2017 for five emerging countries was carried out. Brazil, Malaysia, China, India, and South Africa were the considered countries due to availability of data. The Dynamic Ordinary Least Square (DOLS) and Fully Modified Ordinary Least Square (FMOLS) were used to analyse the data. The study confirmed the applicability of the Mundell-Fleming model in the studied countries given a positive relationship between interest rate and portfolio investment. This result means that when interest rates rise, capital flows also increase. In addition, the confirmation of Mundell-Fleming model is reflected in the negative relationship between portfolio investment and the rate of exchange. The Mundell-Fleming model describes how movement of capital and exchange rates behave. The study recommended that to ease the threat of currency appreciation, the Central Banks in merging market economies must ensure that the domestic interest rate is always in line with the world interest rate. This will promote exchange rate stability and whenever there is an appreciation/depreciation the Central Banks must use interest rates to bring back the exchange rate to the desired rate. In emerging market economies, the reserve banks must employ what is referred to as the "sterilization" of capital flows to lessen the threat of currency appreciation. The local component of the monetary base (bank reserves plus currency) is decreased in a successful sterilization operation to counteract the reserve influx, at least temporarily. , Thesis (PhD) -- Faculty of Business and Economic Sciences, School of Economics, Development and Tourism, 2023
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- Date Issued: 2023-12
An exploration of stakeholder perceptions of the quality of teaching and learning in higher education
- Authors: Jackson,Linda Grace
- Date: 2023-12
- Subjects: Quality assurance --Education (Higher)-- South Africa , Teaching and learning – Nelson Mandela University , Quality education—South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/62464 , vital:72757
- Description: Quality in higher education is a complex and evolving concept that has been a subject of measurement, assurance and promotion in universities globally for the past three decades. However, its precise definition remains elusive due to its fluid nature, influenced by various contextual factors and stakeholder perspectives. This study explored the concepts of quality teaching and quality learning within the specific context of Nelson Mandela University, focusing on two critical internal stakeholder groups, lecturers and students. By maintaining a constant context, the study sought to gain a deeper understanding of how these stakeholders perceived and contributed to the overall quality of education at the institution. Defining quality in higher education (HE) is important, as it directly impacts on the evaluation processes within educational institutions. Presently, most Higher Education Institutions (HEIs) assess quality using tangible inputs and outputs, resulting in a quantifiable representation of quality. Despite this approach, realistically, the anticipated improvements in the quality of teaching and learning are not apparent, leading to concerns about graduate readiness for the demands of the workforce. This situation raises imperative questions about the quality of teaching and learning within HEIs, necessitating a response to address this issue. This study used the conceptual model Schindler et al. (2015) developed to investigate stakeholder perceptions of quality teaching and quality learning in higher education (HE). The research followed a novel perspective by uncoupling quality in HE from the prevailing neoliberal approach and considering quality in HE within social inclusion interventions (Gidley et al., 2010a) already in place in HE settings. The research methodology expanded on social inclusion theory and employed a qualitative, participative and visual approach adapted from Mmogo-method®, an indigenous method. The research design fostered active participation from the participants, who assumed the role of co-researchers. Participants constructed their answers to the research question using unstructured materials, subsequently sharing, explaining, and interpreting their viewpoints within the group setting. , Thesis (PhD) -- Faculty of Education, School of teaching and learning, 2023
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- Date Issued: 2023-12
Analysis of export performance and its determinants in Uganda
- Authors: Mugambe, Kenneth
- Date: 2023-12
- Subjects: Economics -- Uganda , Shipping -- Economic aspects -- Uganda , Exports -- Uganda
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/65841 , vital:74273
- Description: The purpose of this study was to investigate whether variations in the factor endowments, endo-genous factors and governance factors can explain the growth rates in export performance in Uga-nda. The study was guided by the objectives, which included examining the effect of factor endowments on export performance in Uganda, examining the effect of endogenous factors on export performance in Uganda and examining the effect of governance factors on Uganda’s export performance. From the theoretical review, the study benchmarks the growth frameworks of neo-classical theory, endogenous growth theory and institutionalist growth theory, which guided the formulation of the empirical growth models. The study followed a longitudinal research design with time series analysis. A longitudinal design was selected for this study to examine the determinants of exporting in Uganda from 1996 to 2021. The estimation was achieved by imple-menting the first instrumental variable generalised method moments (1V-GMM) on a linear dy-namic panel model through the specific-to-general modelling technique. Among the factors moti-vated by the neo-classical theory paradigm, estimates from this study indicate that foreign direct investment has a positive influence on Uganda’s export performance positively. At the same time, gross capital formation significantly reduces the growth of exports. On the other hand, labour force (in the final model) does not influence changes in export performance since it is insignificant. Among the endogenous growth factors, estimates show that higher exchange rates and inflation have a significant negative effect on Uganda’s export performance. Estimates indicate further that among the governance factors, control of corruption has no effect on Uganda’s export performance. On the other hand, government effectiveness (which also serves as regulatory quality) has a significant negative effect on export performance in that government efforts to im-prove its efficacy affect export performance negatively. So the study shows that variations in Uga-nda’s export performance can partially be explained by the neo-classical trade theory and the endogenous growth model with little influence from the institutional growth model, suggesting the incompleteness of the growth frameworks adopted in assessing the sources of export performance in Uganda. The regression results from Model 3 indicate that all the independent variables explain 77.21% (R Square = .7721) of the variations in export performance, implying that the remaining 22.79% explains other factors not considered in this study. In conclusion, factor endowments play a crucial role in driving Uganda’s export performance. Foreign direct investment consistently influences exports, underscoring the role of capital, technology and international market access in enhancing export competitiveness. However, the negative co-efficient for gross capital formation raises concerns about potential trade-offs between domestic investment and export promotion. In addition, the positive co-efficient for real effective exchange rate (REER) in Model 2 suggests that a favourable exchange rate enhances export competitiveness. This highlights the importance of exchange rate policies that promote stability and competitiveness. However, the mixed and marginal significance of REER in Model 3 indicates the presence of other factors influencing the relationship, emphasising the need for a comprehensive analysis of exchange rate dynamics. The negative co-efficients for inflation across the models imply that higher inflation rates may hinder export performance, emphasising the importance of maintaining price stability to preserve export competitiveness. Based on the results of the analysis, a number of policy recommendations for Uganda can be made. The country should prioritise export promotion initiatives as supported by the positive and significant influence of previous export performance and foreign direct investment on exports. The government could implement targeted policies and programmes to support export-oriented industries, provide incentives for export activities and facilitate market access for Ugandan goods and services. Uganda could attract more investments and stimulate export growth by fostering a conducive environment for exporters. , Thesis (PhD) -- Faculty of Business and Economic Sciences, School of Economics, Development and Tourism, 2023
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- Date Issued: 2023-12
Arts-based participatory research for more equitable ocean governance in South Africa
- Authors: Strand, Mia
- Date: 2023-12
- Subjects: Marine resources conservation , Marine resources development , Law of the sea
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/66017 , vital:74307
- Description: This research explored the usefulness of arts-based participatory research (ABPR) in identifying more equitable ocean governance in South Africa. Co-developing the ABPR with Indigenous and local knowledge holders as co-researchers, the research expanded on opportunities to inform more equitable marine spatial planning (MSP) and marine protected areas (MPAs) processes. Working with 24 co-researchers in Algoa Bay (Eastern Cape) and 24 co-researchers in Mandeni (KwaZulu-Natal) for over two years, the thesis formulated and contextually adapted an approach incorporating photovoice and digital storytelling for co-researchers to share their ocean knowledges, priorities and stories. As people hold various priorities, interests and knowledges of the ocean, these knowledges shape how people interact with the ocean and coast. Despite a multitude of interconnected and complex ocean knowledges (pluriversality), a growing body of literature describes the exclusionary, top-down and inequitable nature of area-based ocean management in South Africa, which do not recognise Indigenous and local knowledge systems (ILKS). The research was conceptualised as a response to these realities, and the ABPR processes were developed with knowledge holders who felt excluded from current ocean governance approaches. Working within a broader theoretical framework of social and environmental justice, the research drew on contextually relevant literature and theoretical paradigms such as social sustainability, social-ecological systems, decolonial and postcolonial theory, social learning, transdisciplinary knowledge co-production and arts-based research. The ABPR methods were carefully crafted together with co-researchers, and photovoice experts assisted with cross-learning workshops. The ABPR included in situ photography and storytelling processes to ensure co-researchers could convey embodied, daily lived experiences or re-imagined connections with the ocean and coast. Embracing and reclaiming world-making through processes of participatory community mapping, the ABPR also facilitated collaborative analysis of co-researchers’ relationships and interactions with the ocean in light of current MSP and MPA processes. The final photostories from the ABPR processes were shared by the co-researchers at two multimedia exhibitions and two multi-stakeholder workshops that brought together relevant government representatives, coastal managers, conservation authorities, scientists and local community members. The results from the ABPR processes provided a number of novel and significant insights into ocean knowledges, connections and priorities that are currently not recognised in ocean governance processes in South Africa. Specifically, the ABPR proved useful in highlighting strong spiritual and traditional connections to the ocean and facilitating direct engagements and social learning processes between various ocean priorities to start bridging the gap between ILKS, marine science and ocean decision-making. Furthermore, the ABPR was valuable in mapping sociocultural priorities and interactions with the ocean, which could inform more inclusive and equitable MSP and MPAs processes. The ABPR surfaced opportunities for cognitive justice, where ILKS holders could own the knowledge production process, and identify opportunities for greater co-management in ocean decision-making. The insights from the research are relevant for several disciplines, research practices, and ocean governance processes. In summary, the ABPR process was useful to identify practical approaches and pathways necessary for embracing and working with the complexity of social-ecological marine systems and the plurality of ocean knowledges for more equitable ocean futures. , Thesis (DPhil) -- Faculty of Business and Economic Sciences, School of Economics, Development and Tourism, 2023
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- Date Issued: 2023-12
Assessing the effects of fish stock management on Cape gannet foraging behaviour in South Africa
- Authors: Strydom, Zanri , Grémillet, David , Pichegru, Lorien
- Date: 2023-12
- Subjects: Gannets -- South Africa , Birds of prey -- Behavior -- South Africa , Fish stock assessment
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/62622 , vital:72887
- Description: Seabirds are one of the most threatened groups of birds under both marine and terrestrial pressures. Among seabirds, the Cape gannet Morus capensis is a southern African endemic species facing several pressures of anthropogenic origin, including competition with industrial fisheries on small pelagic fish stocks. Cape gannets, being a long-lived species that is sensitive to environmental changes, are sentinels of change in oceanic environments granting it important to understand which factors influence their foraging behaviour and breeding outputs. For example, factors like age can result in a loss of physical capabilities which can lead to behavioral compensation and subsequent changes in chick provisioning rates and amounts. With the current fisheries management the fish stocks are continually decreasing, indicating the importance of an updated fine-scale assessment on the spatiotemporal overlap between foraging gannets and fisheries. The first objective of this thesis was to determine the influence of adult Cape gannets’ age and sex on their foraging characteristics and energy expenditure during foraging. I equipped chick-rearing Cape gannets of known age and sex with a 3D accelerometer and GPS device. Foraging effort (trip duration, foraging path and maximum distance to the nest) did not differ between sexes nor with age in Cape gannets. Both sexes rested less on the water with age. Aging females also spent more time in flight than males. The age- and sexual differences in energy expenditure prevalent in our study might reflect niche and/or risk partitioning strategies to ensure adequate provisioning to the chick. The second objective of this thesis was to determine the influence of fisheries catch rates, sardine and anchovy biomass, and adult foraging effort on chick growth rates in Cape gannets, using a long-term dataset collected between 2005 and 2020 on Malgas Island. I equipped chick-rearing adults with a GPS device and I weighed the chicks for between 3 to 6 increments to calculate the average daily mass increment. Of all the variables, foraging trip duration was the main determinant of daily growth rates, with chicks benefitting from parents’ shorter foraging trip durations. Chicks tended to grow slower when fisheries catch of sardine and anchovy were higher, possibly an effect of competition with fisheries. Chicks also grew faster when fish biomass was higher. This long-term monitoring demonstrated the possible effect of food competition between Cape gannets and fisheries, with negative impacts on gannet fitness as determined via chick growth rates. The third objective of this thesis was to determine the influence of both the biomass and fisheries catch rates of sardine and anchovy on Cape gannet foraging effort at a spatial and temporal scale. This was achieved by equipping a total of 668 chick-rearing Cape gannets with a GPS device. With an increase in fisheries catch there was an increase in the birds’ foraging effort. To reduce competition between the gannets and fisheries, the gannets’ core foraging areas seldomly overlapped with the fisheries catch locations, at the cost of the gannets’ increased foraging effort. One method to halt the Cape gannet population decline would be to conserve the fish resources close to the breeding colonies. This would reduce the birds’ foraging whereby increasing their fitness. Safeguarding small pelagic fish to ensure the perseverance of the remaining Benguela seabird populations, would lead to preserving the Benguela marine ecosystem as a whole. My study provided new insight into effects of fish stock management on Cape gannet foraging behaviour in South Africa, and the need for adequate management to ensure population persistence. , Thesis (PhD) -- Faculty of Science, School of Environmental Sciences, 2023
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- Date Issued: 2023-12
Creating a value proposition in the optometry industry: perceptions of customers
- Authors: Mmamogobo, Maleage Jacob
- Date: 2023-12
- Subjects: Optometry--Economic aspects , Optometry--Practice , Consumer behavior -- South Africa , Corporate image -- Management
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/65782 , vital:74237
- Description: The highly competitive environment in the optometry healthcare industry, the over-serviced urban market and the cost of keeping businesses operating with little knowledge of how a profitable business operates lead most independent business owners to employ inappropriate strategies to manage situations that arise, and the optometry industry, particularly standalone practices, are particularly vulnerable to these challenges. As a result, creating a value proposition for customers has become a common approach to operations and ensuring service providers’ survival in new and existing practices. Therefore, the limitations under which service providers operate need to be investigated to determine which competencies are lacking. The study aimed to create a value proposition in the optometry industry in South Africa by exploring optometry customers’ perceptions. Through a qualitative research approach a total of 17 telephone interviews and eight mask-to-mask interviews were conducted with participants (five per chosen service provider from all nine provinces). The participants were drawn from all service providers’ current customers, including those whom in the past three months used the services or products, purchased an optical frame temple or full pair of spectacles, underwent an eye examination, and others. The qualitative data analysis employed content and thematic analyses, focusing on key elements such as the importance of creating a value proposition, developing a value proposition process, and the challenges associated with its creation. The five building blocks for creating a value proposition are visibility, service and product, price and value, reputation management and communication. This study’s findings will assist individual service providers to evaluate themselves against customers’ expectations and benefit customers and researchers. The main recommendations are 24-hour online access to a website, quality of services or products, full standard optometry service, affordable health care products or services, a short turnaround time for complete products, and acquired management skills to grow and generate sales. , Thesis (PhD) -- Faculty of Business and Economic Sciences, School of Management Sciences, 2023
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- Date Issued: 2023-12
Eco-leadership determinants necessary for effective sustainability implementation
- Authors: May,Jodé
- Date: 2023-12
- Subjects: Retail trade -- Management , Leadership -- South Africa , Sustainability
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/65683 , vital:74228
- Description: Sustainability is regarded globally as one of the key focus areas for organisations and requires also considering environmental and social performance in addition to economic performance. Eco-leadership is required to ensure operations impact society and the environment in a positive manner, in particular in the retail sector as customers have become conscious of their purchases being produced sustainably. The main objective of this study was thus to explore eco-leadership determinants necessary for sustainability implementation in retail organisations. The research was aimed at expanding knowledge about how retailers can implement or improve their sustainability status by following an eco-leadership approach. A literature review was conducted on what leadership in organisations entailed and how it can be described in terms of leaders’ characteristics, work practices and decisions. In addition a review on, leader qualities and leadership styles in general and of change leaders such as eco-leaders, sustainability strategies from both an environmental and socially responsible view in general and of the retail sector, was provided. The study followed a qualitative research approach using purposive sampling to identify the 11 participants from across the provinces in South Africa and retail product categories comprising of two hard-line retailers, five soft goods and consumables retailers, three FMCG retailers and one art retailer. A semi-structured interview guide was utilised to gather primary data using face-to-face, telephonic and email interviews. Content and constant comparative analysis was used to analyse the data. It appears that retailers ascribe eco-leadership in relation to resource management-, being people centred and practising sustainability leadership. All retailers seem to demonstrate their commitment to eco-leadership and serve society. Their sustainability status is publicised via digital and print media or visually displayed in-store. They practise eco-leadership as it is beneficial for their reputation or to ensure business continuity. Retailers use innovation and incorporate eco-leadership into their business models and have further plans to improve their sustainability. , Thesis (PhD) -- Faculty of Business and Economic Sciences, School of Management Sciences, 2023
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- Date Issued: 2023-12
Evaluation of the antidiabetic potential, safety and efficacy of selected natural products using zebrafish larvae and in vitro bioassays
- Authors: Reddy, Shanika , Dambuza, Ntokozo
- Date: 2023-12
- Subjects: Traditional medicine -- Research -- South Africa , Medicinal plants -- South Africa -- Research , Insulin resistance
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/62575 , vital:72825
- Description: Abstract. , Thesis (MSc) -- Faculty of Science, School of Biomolecular & Chemical Sciences, 2023
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- Date Issued: 2023-12
Evidence of Late Holocene extreme marine wave event (tsunami) deposits along the South African coast and implications for coastal zone management
- Authors: Mfikili, Athi Nkosibonile
- Date: 2023-12
- Subjects: Tsunamis -- South Africa , Coasts -- Risk assessment , Sediments (Geology)
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/62517 , vital:72811
- Description: Although extreme marine wave events such as tsunamis and storm surges have always been part of human existence, their impact on ever-growing coastal population of the world’s coast was highlighted by the recent catastrophic events over the past three decades. Although in situ observations and eyewitness accounts have improved our ability to record and interpret wave inundation by modern extreme marine events, records documenting inundation by pre-historic and historical events are relatively sparse to provide reasonable information on their distribution, magnitude and frequency intervals in most parts of the world. Owing to consequences these natural coastal hazards have on coastal population and infrastructure of the world’s coast, onshore sedimentary deposits preserved in the geological records have been extensively utilized by scientists worldwide to reconstruct the record of pre-historic and historical events and establish the recurrence interval of future events. Although studies investigating inundation of past tsunami has increased worldwide over the past two decades, research on extreme marine inundation has received little attention along the South African coast, despite known inundation by recent events and potential source mechanisms. Therefore, the aim of this study is to investigate sedimentary evidence of past tsunamis and related extreme marine wave events (i.e., storm surges) preserved in the recent geological archive of several coastal environments along the South African coast. The Swartkops, Kabeljous, Kromme and Keurbooms estuaries located in log-spiral bays along the south-east coast and sheltered coastal systems of the Berg Estuary and Verlorenvlei as well as coastal lowlands of the Dwarskersbos on the west coast were selected as the study sites. The sediment cores were collected from these coastal environments and identification of extreme marine wave inundation was based on the recognition of distinct anomalous sand layers. To characterise sediment transport and reconstruct provenance source origin of the deposits, a combination of sedimentological (i.e., grain size distribution), exoscopy (i.e., quartz grain surface microtextures) and micropaleontological (i.e., foraminiferal assemblages) proxies were utilized. Furthermore, age estimation of the deposits was determined using a combination of radiocarbon (14C) and radiometric (137Cs and 210Pb) dating methods.Evidence of coastal flooding by high-energy marine wave events is found preserved in the stratigraphic records of Swartkops and Kabeljous estuaries along the south-east coast and lowlands of Dwarskersbos on the west coast in the form of anomalous sand deposits (layers). The anomalous deposits of Swartkops and Kabeljous estuaries generally consist of gravel-sized shell fragments often with a sharp erosive contact suggesting deposition by a highly energetic marine wave event. Although the preservation varies between cores, a maximum of three anomalous sand depositional layers are preserved in the Swartkops whereas only a single layer in the Kabeljous Estuary with a basal layer of calcrete deposits. 210Pb and 14C dating, constrain the ages of the younger deposits (i.e., the uppermost layer) at Swartkops between 1770-1804 AD and 339-3 cal. BP (1611-1947 cal. AD), respectively. Although these ages span over a wide period, they are interpreted to represent evidence of one of the historical tsunamis generated in the subduction zones of the Indian Ocean e.g., 1762 AD and 1797 AD events generated by 8.8 and 8.0 Mw earthquakes in the Arakan and Sunda Subduction Zones, respectively. Furthermore, the deposits could also represent geological evidence of the 1833 Mentawai events whereas evidence of 1883 Krakatau tsunami is not disregarded, since this event reportedly inundated Algoa Bay. On the other hand, the 14C dating constrain the ages of the second anomalous deposits between 1526-1253 cal. BP (424-697 cal. AD), whereas the older anomalous deposits preserved in the deeper sections of the Swartkops cores as well as the backwater channel of the Kabeljous Estuary are constrained to have been deposited around 4000 cal. BP. Although there is no known locally documented extreme marine wave event during this period, these deposits are interpreted to represent late and mid-Holocene tsunamis associated with mega-thrust subduction zones of the Indian Ocean whereas local submarine landslide generated event are also not disregarded entirely. On the west coast, three anomalous deposits representing extreme marine wave inundation are preserved in the coastal lowlands of the Dwarskersbos. Although the general sedimentary features and thickness vary between the deposits, the first anomalous deposits in the uppermost section of the cores consist of medium sand with scattered shell fragments whereas, the third anomalous deposits in the deeper section of the cores are generally coarser with gravel-sized shell fragments and sharp erosive basal contacts. By contrast, the second anomalous deposits consist of three successive sub-layers of yellow sand with variable sedimentary features and these layers represent successive wave inundation events. Although the sedimentary characteristics of these sub-layers varies, it was noted that the lowermost layers consist of coarser and less well sorted sediments often with basal erosive contact, suggesting that the first wave was more energetic than the two-succeeding waves. Furthermore, calibrated 14C dated shell fragments from the first and second anomalous deposits yielded ‘post-bomb’ ages suggesting deposition after 1950 AD. Given their position within the stratigraphic records, the two deposits are interpreted to represent first geological evidence of the 2008 west coast and 1969 Dwarskersbos events, respectively. On the other hand, the 14C dated shell fragments constrain the deposition of the third anomalous deposits between 315-0 cal. BP (1635-11950 cal. AD) and 358-0 cal. BP (1592-1950 cal. AD), respectively. The third anomalous deposits are interpreted to the 07 April 1620 event, which was described as ‘Two startling thunderclaps’ near Robben Island. Although initially associated to earthquakes, there are no records of an earthquake during this period, therefore, we postulate that the 1620 event could have been a similar event to that of 2008 that inundated the west coast region and/or an unknown event. While it is acknowledged that the absence of reliable source mechanisms poses a great challenge in the reconstruction of extreme marine wave events inundation along the south-east coast, the findings of exoscopy and micropaleontological analyses suggest that the deposits were transported to their depositional environments, although resultant microtextural features and occurrence of individual foraminiferal species and their taphonomical conditions is dependent on coastal setting. The south-east coast deposits consist of highly diverse foraminiferal assemblages, which are dominated by marine and marginal-marine taxa with relatively low abundances of estuarine-brackish species and variable taphonomical conditions. Furthermore, the mechanical-induced features such as percussion marks, fresh surfaces with sharp edges were still preserved on quartz grain surface of the Swartkops deposits, despite dominance by chemical-induced features such as dissolution. By contrast, grain surface microtextural signatures of the Dwarskersbos deposits are dominated by mechanical features such as fresh surfaces and v-percussion marks. Furthermore, the foraminiferal assemblages of the Dwarskersbos deposits consist of exclusively marine and marginal-marine species, suggesting that the sediments were sourced from shallow water environments as well as the adjacent beach. It was further noted that the foraminiferal tests of these deposits consist of higher abundance of corroded and fragmented tests indicating deposition by high-energy conditions. , Thesis (D.Phil) -- Faculty of Science, School of Environmental Sciences, 2023
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- Date Issued: 2023-12
Immigration and human development outcomes in post-apartheid South Africa
- Authors: Nyagweta, David Tinashe
- Date: 2023-12
- Subjects: Emigration and immigration -- Economic aspects , South Africa -- Emigration and immigration -- Economic aspects , Emigration and immigration -- Government policy
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/65912 , vital:74283
- Description: Immigration remains an issue of constant and recuring debate which in many instances has reached extreme limits of violent confrontation. South Africa has been at the forefront of this debate given the history of migration that has led to the creation of the modern state. In this context, the current era has presented contestations on the implications of immigration to the country and how that relates to human development. With this backdrop, this thesis sought to investigate international immigration and its relation to human development outcomes within context of the democratic era in South Africa. Thus, the study focused on evaluating the differences between immigrants and non-immigrants in terms of physical and mental health, subjective wellbeing, and education. Furthermore, the study evaluated the relationship between immigration concentration across provinces and human development outcomes in aggregate. The comprehensive results focusing on both the full and racial specific sample identified that there are no significant differences between immigrants and non-immigrants in terms of health pinned to self-reported health. This finding supports small scale studies in South Africa and other countries which divert from the immigrant-paradox paradigm although this could be accounted for by convergence adjustments to the healthy immigrant effect. In terms of mental health and subjective wellbeing, the results showed that immigrants are significantly less likely to report depressive level scores on the CEDS-10 scale. Thus, the study demonstrated that the healthy immigrant effect holds in relation to depression. Contrarily, in terms of satisfaction with life, no significant differences are found between immigrants and non-immigrants, thus pointing to possible sudden convergence upwards in satisfaction with life, particularly considering most immigrants are from countries with lower levels of satisfaction with life. In relation to education findings, it was demonstrated that there are no significant differences between immigrant and non-immigrant students in terms of progression. Thus, neither the straight-line nor immigrant-paradox argument prevails as found mostly in the Global North. Lastly, regional analysis which accounted for human development across provinces showed that a significant positive relationship exists between immigration concentration and human development overall coupled with the component accounting for education diverting from panel studies. Furthermore, insignificant relationship is found in terms of health and income supporting findings by the study of no differences between immigrants and non-immigrants. Thus, this thesis proved that the pessimistic view on immigrants significantly diverting from the overall health and education levels coupled with negative relationship with human development are not supported empirically within the context of post-apartheid South Africa. Results of this study provide evidence that is critical to formulate policy, both in terms of immigration and further factors identified as important markers, on issues of education and physical and mental health such as race, gender, and wealth. In this regard, the differences in findings from those in countries especially in Global North challenge policies based on theoretical and empirical formulations that lack account for countries especially in the Global South which have increased levels of both inequality and poverty. Thus, it is critical that policies reflect the socioeconomic issues a country faces and informed by research that takes regional factors within a country to account. The study prescribes policies which aim to reduce discrimination due to unproved assumptions and those that aim to ensure that racial and income inequality are tackled within the country. In terms of immigration, rollout of awareness projects and campaigns, coupled with regional policies and projects rooted in communities to ensure participation of both sending and receiving countries will create platforms for better structuring of policies to tackle immigration especially given the integration goals of the African Union. Moreover, critical revaluation of policies and implementation thereof is critical given results identify inequality with those that are African, Coloured, and from poorer households facing lower levels of health, education and high levels of depression scores coupled with life dissatisfaction. Policies should thus, focus on ensuring that redistributive investments are enabled and implemented efficiently for better outcomes in terms of access to education, health, and economic opportunities for the disadvantaged. In enabling such projects with considerations of societal needs and immigration policies, strides could be made given that most contestations arise out of increased inequalities and socioeconomic destitution. , Thesis (PhD) -- Faculty of Business and Economic Sciences, School of Economics, Development and Tourism, 2023
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- Date Issued: 2023-12
Influence of digital marketing activities on brand awareness in Zimbabwean polytechnics
- Authors: Bhebe, Bekimpilo
- Date: 2023-12
- Subjects: Internet marketing , Industrial marketing , Digital media , Brand name products Brand choice
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/65545 , vital:74186
- Description: The heightened competition for skilled students, capable staff, and government funding has spurred Zimbabwean higher education institutions to engage in competitive efforts. Due to the intense competition in the higher education sector, higher education institutions have become more market-oriented than before. Furthermore, the increased offering of online programmes by higher education institutions during the COVID-19 pandemic period has increased the bargaining power of students. Higher education institutions have therefore taken initiatives to promote their institutions through various interactive digital marketing activities. Digital marketing activities have brought about innovative changes and opportunities for higher education marketers. Higher education marketers, specifically university marketers, are taking advantage of the opportunity to market their institutions through digital marketing activities, thereby gaining a competitive advantage over other institutions of higher education such as polytechnics. There is, therefore, a need for polytechnics to effectively utilise digital marketing activities such as websites, text messaging, social media marketing and email marketing for brand awareness purposes so that they gain a competitive advantage over other institutions of higher learning. The study aimed to empirically evaluate the influence of digital marketing activities on brand awareness of Zimbabwe polytechnics and to propose a model that can be adopted by Zimbabwean polytechnics in an attempt to enhance their brand awareness. As such, a conceptual model was constructed from the literature review to investigate the relationship between digital marketing activities (independent variable) and brand awareness (dependent variable). Based on the comprehensive literature review, four digital marketing activities (website, text messaging, social media marketing and email marketing) were identified in the Zimbabwean polytechnic context. The study further identified the digital marketing activities sub-factors that were adopted in the development of a customised measuring instrument that was used to evaluate the influence of digital marketing activities on brand awareness of Zimbabwean polytechnics. These sub-factors included web design, navigation, interactivity and relevance for website; personalisation, interactivity, timeliness and reliability for text messaging; interactivity, sharing of content, advocacy and credibility for social media marketing and personalisation, interest, informativeness, interactivity and efficiency for email marketing. Furthermore, five hypotheses were formulated and three hypotheses were supported while two hypotheses were rejected. The positivist paradigm, the descriptive research design and the quantitative approach were used in the current study. The study‟s target population consisted of the registered student population of the two Zimbabwean polytechnics in the Midlands province, in the Applied Sciences, Commerce and Engineering divisions. The respondents were selected using non-probability sampling, specifically convenience sampling. Data was collected through an email survey, whereby a web-based self-administered questionnaire was distributed to the Applied Sciences, Commerce and Engineering students with assistance from the Information Technology Departments of the two polytechnics. The measuring instrument consisted of three sections with section A having nominal scales to gather demographic data from respondents. Section B consisted of scaled items that measured the influence of digital marketing activities, while section C measured brand awareness focussing on the three levels of brand awareness. A total of 500 completed questionnaires were received from the two polytechnics. Out of the 500 completed questionnaires, a total of 492 questionnaires had usable responses. Therefore, the current study had a response rate of 98.4%. The study further used descriptive statistics and inferential statistics to interpret the data. The descriptive statistics utilised included frequency measures of central tendency and measures of dispersion or variation. Regarding inferential statistics, the study utilised the CFA, Pearson‟s correlation coefficient, regression analysis, p-value independent sample t-test, ANOVAs and the Welch Robust test, Tukey HSD test, the Games-Howell test and the Cohen‟s d tests. The findings of the study revealed a significant relationship and a strong correlation between digital marketing activities and brand awareness. Regarding website use and brand awareness, a significant relationship and a moderate correlation were determined. The results further revealed an insignificant relationship but a moderate correlation between text messaging and brand awareness. The empirical results also revealed a significant relationship and a strong correlation between social media marketing and brand awareness. Finally, an insignificant relationship and a moderate correlation were revealed between email marketing and brand awareness in the current study. Based on the empirical results, this study gave recommendations to polytechnic marketers. Under the website use items, the study revealed that the respondents had a less positive experience with the web design of the polytechnics' websites. It was recommended that polytechnic marketers should take pragmatic steps to enhance their polytechnic web designs so that students can take note of the college information on well-organised polytechnic websites. The study also found that the respondents felt the need to experience more personalisation and timeliness of the polytechnics' text messaging. Therefore the polytechnic marketers were advised to personalise their text messages each time that they send them to students enabling them to build long-lasting relationships with students. Regarding the timeliness of text messaging, the polytechnic marketers were advised to send text messages to students at the right time when they need the information so that the disseminated information is readily accepted by the students. The polytechnic marketers were also advised to provide up-to-date polytechnic information on their social media pages after the respondents indicated the need to experience more sharing of content on the colleges' social media pages through the provision of up-to-date information. Lastly, the empirical results revealed that the respondents felt the need to experience more personalisation and the provision of interesting content through polytechnic email marketing. Therefore the Zimbabwean polytechnic marketers were strongly recommended to personalise the students' emails to motivate students to engage with them personally. The polytechnic marketers were further recommended to include interesting content in students' emails so that they draw the students' attention to polytechnic information in their emails. The study made the following important contributions. Firstly, the study made contributions to theory, literature, knowledge, society and marketing practitioners within the context of digital marketing activities and brand awareness in Zimbabwean polytechnics. Secondly, the current study provided the measuring instrument and a model that adds to scholarly work and provides a basis for future research in the marketing of Zimbabwean polytechnics. Thirdly, the study will assist in the enhancement of brand awareness of Zimbabwean polytechnics, enabling them to attract academically gifted students who will become productive workers, self-reliant entrepreneurs and responsible citizens. Lastly, the model will also provide a basis for future reference for polytechnic marketers in their marketing efforts for competitive advantage purposes. The current study had limitations that comprised uneven sample distribution, the adoption of limited social media variables and the exclusion of external stakeholders from the current study. Finally, the study made recommendations for future areas of study. , Thesis (PhD) -- Faculty of Business and Economic Sciences, School of Management Sciences, 2023
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- Date Issued: 2023-12