4. Electronic Theses and Dissertations (ETDs) - Faculties submissions

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A Mixed Methods Sequential Explanatory Study of the Determinants of the Insurance Purchase Decision-Making in Zambia
(University of the Witwatersrand, Johannesburg, 2020-03) Haamukwanza, Chimuka Leo; Masie, Desné
Zambia has low insurance consumption and penetration. The particularities around the insurance purchase decision-making have not been researched. Financial decision-making has been a topic of interest as increased financial services uptake is one method of increasing financial inclusion. This thesis defines and compares the Insurance Purchase Decision-making (IPD) of the Workers in the Pensions and Insurance Industry (WPII) and the Urban Poor (UP) using a mixed methods sequential explanatory design. In the quantitative phase, data was collected using a questionnaire and analysed using IBM SPSS and IBM AMOS for Structural Equation Modelling. Significant differences emerged in the two populations regarding their IPD: the risk coping mechanisms, the extent of loss aversion, and education attained. The qualitative phase delved into detail on the areas that were not clear in the quantitative phase and used structured interviews to collect data. The thesis has confirmed that the decision-making of the two populations and their perceptions on insurance differ. The thematic analysis in the qualitative phase of the thesis highlight three major themes from both populations that insurance practice and management and the government need to undertake to enhance insurance consumption: financial literacy, service quality and regulation. This thesis has contributed to the literature on the IPD in Zambia; towards a detailed understanding of the IPD in Zambia through the integration of an interdisciplinary mixed methods approach; and highlights how the WPII and the UP make their IPD. The thesis highlights the potential consumers’ needs and inclination towards insurance and how insurance practice could take advantage of the consumers’ needs in undertaking market segmentation and penetration. The thesis optimises the insurance needs of the two populations: their expectations, their experiences, their understanding of and perceptions on insurance. The activities that insurance practice and management should do to enhance insurance consumption in Zambia have been highlighted.
A study of the support effect of carbon dots-derived graphene-like sheets on the autoreduction of cobalt nanoparticles for Fischer–Tropsch synthesis
(2022) Mokoloko, Lerato Lydia
The aim of this study was to synthesize and characterize carbon dots (CDs) and to use them as a support material for cobalt (Co) based Fischer-Tropsch synthesis (FTS) reactions. The CDs were chosen for this study due to their small size (< 10 nm), easy surface functionalization and synthesis. The small size of the CDs was required for the study of inverse catalyst support effects. An inverse supported catalyst (in this case, the Co/CDs catalyst) refers to the dispersion of a support material that has a small size (d < 5 nm) onto the surface of a metal catalyst with a similar small size (d > 8 nm). The synthesis of this proposed catalyst was successful. FTS studies on the Co ‘supported’ CDs were attempted. Extremely poor FT activity was observed. Post analysis of the catalyst revealed that the CDs did not retain their quasi-spherical and small particle size morphology under the FTS reaction conditions (temperature 220 °C, 10 bar P; H2:CO ratio = 2:1). Instead, upon exposure to a heat treatment, the CDs were transformed into layered structures with a unique resemblance to graphene-based nanosheets (GNSs). This transformation impacted on the use of these catalysts in the FTS reaction. However, this result indicated an unusual transformation of the CDs into another carbon shape. In light of the fascinating transformation phenomenon, annealing studies were then conducted to investigate the effect of annealing temperatures on the CDs structural changes. The CDs (average d= ~ 2.5 nm) used in this study were obtained from the microwave-assisted carbonization of L-ascorbic acid and subjected to a heat treatment (i.e. annealing) at temperatures between 200 and 700 ℃ in a horizontal CVD apparatus under an inert nitrogen gas. It was observed that annealing transformed the CDs from 0-D qausi-spherical nanoparticles to 3- D multi-layered carbons (at 300-600 ℃) and finally 2-D layered materials (at 700 ℃). Furthermore, annealing at 700 ℃ yielded a 2-D single-layered material with comparable properties to traditionally reduced graphene oxide (rGO). A wide range of characterization techniques were used to gain an insight into the physicochemical properties of these novel CDs-derived allotropes as well as to rationalize their mechanism of formation. After evaluating the properties of these materials, it was clear that the surface oxygen functional groups, observed from XPS, 13C NMR and other studies, were responsible for the CDs to rGO transformation. It was proposed that the CDs are assembled to form rGO (and other CDs-rGO derivatives) by either the Ostwald ripening (in which the carbons agglomerated via a gas phase) or a solid phase reaction (involving reaction of CD edges). To further investigate the effect of annealing on the evolution of CDs to layered carbon structures, N-doped CDs (or NCDs) were also studied. The method used to make the pristine CDs was modified by incorporating urea as a nitrogen source to make the NCDs. Annealing the NCDs at temperatures between 200 and 700 ℃ also transformed the quasi-spherical NCDs (average d = ~ 4.1 nm) to multi-layered carbon sheets at temperature as low as 200 ℃. The CD transformation was also associated with the loss of surface functional groups, with % O and N contents of ca. 17 and 16 % (pristine NCDs) being reduced to ca. 8 and 7 % for NCDs annealed at 700 ℃. A similar mechanism for the formation of these N-doped layered carbon structures by annealing was also proposed here. For these samples, it was also observed that the N-bonds, especially the sp3 type nitrogen bonds found on the edges of the NCDs, also took part in the coalescence of the NCDs to give the layered materials. XPS data suggested that in the process, these sp3 type nitrogen bonds were transformed into sp2 pyrrolic-N, pyridinic-N and GraphiticN groups. The annealed CDs products were used to support Co (called Co3O4/T250, Co3O4/T400 and Co3O4/T700 where T is the temperature at which the CDs were annealed) for use in FT studies. Studies were conducted to evaluate the effect Co hydrogen reduction temperatures verses autoreduction temperature, catalyst thermal stability and performance in the FTS reaction at 220 °C (10 bar P; H2:CO ratio = 2:1). Upon investigation of the reduction behaviour of the Co/CDs derivative catalysts using in situ PXRD, it was found that these materials can successfully facilitate autoreduction of Co3O4 to Co face-centered-cubic (fcc) at temperatures > 400 ℃ by a reduction pathway similar to that observed using conventional H2 reduction conditions. As expected, the reduction under H2 took place at a lower activation temperature (> 250 ℃) than the autoreduction process. It was also noted that these novel carbon support derived from CDs gave reduced FTS performance compared to the unsupported Co, especially towards C5+ yields (< 30 % for all Co supported catalysts). These novel CDs-derived allotropes were found to have limited use as supports in Co-based FTS, due to Co agglomeration. These NCDs-derived allotropes (annealed at 200 ℃, 400 ℃ and 700 ℃) were incorporated as active layers in the fabrication of chemoresistive sensing device detection of volatile organic compounds (VOCs). These layered showed enhanced chemical vapour sensing properties, especially for methanol and ethanol detection at room temperature. Therefore, although there are great limitations for applications of these CDs-derived layered allotropes in FTS reaction, these materials show a much better potential for applications in facile and cost effective VOC sensors. Further studies on this will be conducted.
A symmetry perspective of third-order polynomial evolution equations
(University of the Witwatersrand, Johannesburg, 2024) Gwaxa, Bongumusa; Jamal, Sameerah
In this thesis, we analyse the full class of ten Fujimoto-Watanabe equations. In particular, these are highly nonlinear third-order and two fifth-order equations. With the aid of computer algebra software such as Mathematica, we calculate symmetries for these equations and we construct their commutator tables. The one dimensional system of optimal subalgebras is obtained via adjoint operators. Finally, we reduce these higher-order partial differential equations into ordinary differential equations, derive their solutions via a power series solution method and show how convergence may be tested. Lastly, we determine some conservation laws
Alternative Tenure Options as a Stepping Stone for Urban Land Reform: The Case of Kwa Mai Mai Muthi Market
(University of the Witwatersrand, Johannesburg, 2024-02) Mnguni, Thobeka; Maina, Miriam M.
This research uses qualitative methods to investigate the case of the Kwa Mai Mai muthi market located in the central business district of Johannesburg where over the decades informal traders have converted their trading units into residential homes. This case is used to respond to the research question, ‘To what extent is taking administrative action to improve land tenure by offering communities rights to occupy urban land feasible and necessary for advancing the urban land reform agenda?.’ The research acknowledges that popular approaches to improving tenure by converting insecure tenure rights to statutory ownership through the Deeds office has had limited success and resulted in efficiencies due to the high costs and the resources intensive nature of this approach. Instead, the research recommends a necessary transition to improving tenure in innovative, context-specific ways that work to build on existing settlements through taking low-cost and low LOE administrative action.
Analysing the player's involvement in video game character animation
(University of the Witwatersrand, Johannesburg, 2021) Ponde, Rugare; Whitcher, Ray
This dissertation investigates the impact of animation on player interest in an existing video game character. There is high demand and expectation regarding character animation quality, yet understanding and achieving this standard is complex and challenging. The quality of a character’s animation is often derived from its direct appeal to the audience and how its representation informs their impression. However, there is a gap in the literature where there is little on how style representation plays a role in character perception and identification in video games. A practice-led approach was used to understand the relationship between player involvement and the player-character's appeal. The process involved the creation of an animation reel to demonstrate how a popular video game character's acceptance can change based on a player's perception of style in the character's animation. I used Link from the video game Super Smash Brothers Ultimate (Nintendo, 2018). The reel was presented to adults between 18 and 35 to review the animations. Using the process of creative exegesis, the theories and concepts about character appeal, animation design, and player involvement were combined to analyse and critique the contributing factors that inform the perception of the creative work. The results from this study indicate that a change in movement style impacted the perception of Link and the participant's demonstrated interest to play him. This study confirms that style representations are an important design consideration to improve a character’s appeal. This topic may benefit the art and technique of character design and how to improve on it.
Analysis of some convergence results for inertial variational inequalities problem and its application
(University of the Witwatersrand, Johannesburg, 2023) Kunene, Thembinkosi Eezy
Some core aspects of nonlinear analysis, which is a major branch of mathematics, are the optimization problems, fixed point theory and its applications. These concepts, that is, optimization theory, fixed point theory and its applications are widely applied in several fields of science such as networking, inventory control, engineering, economics, policy modelling, transportation and mathematical sciences to mention but a few. Due to its relevance to different fields, the theory of optimization and fixed point has been a popular field of research for a long time. Given its expansive nature, researchers continue to make new discoveries and advancements, contributing to its enduring significance across various disciplines. The goal of this dissertation is to explore some convergence iterative methods for approximating optimization problems. We propose a new modified projection and contraction algorithm for approximating solutions of a variational inequality problem involving a quasi-monotone and Lipschitz continuous mapping in real Hilbert spaces. We incorporate the technique of two-step inertial into a single projection and contraction method and prove a weak convergence theorem for the proposed algorithm. The weak convergence theorem proved requires neither the prior knowledge of the Lipschitz constant nor the weak sequential continuity of the associated mapping. Under additional strong pseudomonotonicity, the R-linear convergence rate of the two-step inertial algorithm is presented. Finally, some numerical examples are given to illustrate the effectiveness and competitiveness of the proposed algorithm in comparison with some existing algorithms in the literature
Anxiety as a Mediator of the Associations Between Stressful Life Events and Social Media Use Intensity in Young Adults
(University of the Witwatersrand, Johannesburg, 2022-05) Ramoroka, Morongwa Rebaabetswe Elina; Price, Esther
Introduction: This study quantitatively explored the associations between SLEs, anxiety, and social media use intensity. The study explores whether anxiety mediates the relationship between SLEs and social media use intensity across all four domains. This study further aims to explore whether social media use intensity, operationalized as an avoidance coping strategy, is possibly due to poor emotional regulation and distress tolerance skills. The first-time undergraduate student population are often inadequately prepared for the transition to university during a critical period of their development. As a result, they may drift towards health compromising behaviours such as intense social media use. The findings will set a precedent for the development of preventative programs and/or interventions in order to assist young adults with emotional regulation. Methods: This was a cross-sectional design that was analysed quantitatively. The participants were invited to participate in online questionnaires which assessed stressful life events, anxiety, and social media use intensity. While a total sample of 402 students completed parts of the online survey questionnaires, a final sample of 360 participants was used in the study as their data sets were complete for all the variables. The Social Readjustment Rating Scale, Beck's Anxiety Inventory, and the Facebook Intensity Scale were the measures used. Results: Positive associations were found between SLEs, anxiety and social media use intensity. Anxiety mediated the relationship between SLEs and social media use intensity across all four domains. This reflected that social media use intensity is a form of avoidance coping mechanism that emerges due to poor emotional regulation and distress tolerance skills. Conclusions: The present study highlights the challenges experienced and how to set a precedent for the development of preventative programs and interventions. Keywords: stressful life events, anxiety, avoidance coping, social media use intensity
Assessing financial literacy amongst anaesthetists in an academic department
(2024) Mohamed, Ayesha Noor
Background: Financial literacy is an important skill that is used to navigate the complex financial landscape. According to studies done in South Africa, wealth, income, racial classification, age, geographical location and level of education affect financial literacy levels. Higher financial literacy is associated with greater wellness and less financial concerns. Studies done in other countries show that doctors have low financial literacy. The financial literacy of anaesthetists in South Africa is not known. Objectives: The aim of this study was to assess financial literacy among anaesthetists in the Wits Department of Anaesthesiology and to identify demographic factors that could predict differences in financial literacy. Methods: This was a cross-sectional, contextual and descriptive study using an anonymous, self administered questionnaire. The questionnaire was an adaptation of the original used in the South African Social Attitudes Survey and was scored similarly. A mean financial literacy score was calculated for each anaesthetist using four domain scores (financial knowledge, financial planning, financial control and product choice and awareness) and used to make comparisons between demographic categories. Results: A total of 184 anaesthetists from the Wits Department of Anaesthesiology were included. The mean financial literacy score (0-100 scale) was 72. With the exception of White anaesthetists scoring higher than Coloured anaesthetists (p= .049), no other demographic category showed significant differences. Gender, age, relationship status and years of employment did not inform any enduring trend with regards to mean financial literacy scores. The mean scores for the individual domains were 79 for financial control, 76 for financial planning, 51 for product choice and 82 for financial knowledge. Between the domains, the mean financial knowledge score was higher than the mean financial planning score (p =.011). The product choice score was found to be the lowest (p<.0005) Only 35% of anaesthetists are confident in buying financial products and services by themselves while 8.2% of anaesthetists are very confident in their retirement planning. Anaesthetists who held an unsuitable financial product in their portfolio accounted for 40%, while 36% of anaesthetists experienced regret regarding financial decisions. It was also found that younger, junior, Coloured and Black anaesthetists have poorer financial preparedness. Conclusion: Anaesthetists in the Wits Department of Anaesthesiology have high levels of overall financial literacy, however, do not display adequate preparedness in planning for a secure financial future. A mandatory structured financial literacy programme during university, specialisation and fellowship training is recommended.
Assessing monitoring and evaluation system implementation challenges: A case of a Botswana Government Ministry
(University of the Witwatersrand, Johannesburg, 2021) Metla, Neo Naledi; Wotela, Kambidima
The Botswana Government instituted for monitoring and evaluation of government projects and programmes in order to redress issues of accountability, transparency and oversight (Lahey, 2015). The aim is to strengthen programme performance and ultimately lead to improved service delivery to the targeted beneficiaries and inform policy decision (NDP11 Performance Framework, 2017-2023). This study utilised a qualitative research strategy and case study research design to conduct the empirical part of the research. The research participants were recruited through purposive sampling. Eight (8) MYSC employees ranging from Executive Management, Senior Management and Management were sampled and interviewed. A semi-structured interview was used to collect information from the respondents. The data analysis was through thematic analysis after transcription of the audio recorded interviews. The findings reveal that there are challenges emanating with implementation of the monitoring and evaluation system in MYSC although it is perceived to be a critical system in guiding programming and improving the ministry’s performance. These challenges are fostered by the lack of accountability, transparency and an oversight not adequately providing guidance and playing its support role. Ultimately they limit inputs, result in unplanned or unmet activities, and fail to produce outputs and consequently prevailing unintended outcomes that cannot serve as concrete evidence for policy decisions. These perceptions confirms the implementation theory, which proclaims that execution of a programme requires appropriations, personnel, talent, time, energy, and equipment available to administrators, their unavailability will decrease the probability of achieving successful results (Vedung, 2017). The theory of change which implies that it is necessary to ensure all are planned for and provided adequately. This research concludes that implementation of the monitoring and evaluation system in MYSC needs to be improved and crucially supported, this requires for improved accountability, transparency and a functional oversight
Benefits of using Internet of Things technology for fuel management at a mechanised underground platinum bord and pillar mine: A Bathopele mine case study
(University of the Witwatersrand, Johannesburg, 2024-01) Thema, Sephela Makete; Cawood, Frederick; Feroze, Tariq
The advent of the fourth industrial revolution, Environmental Social and Governance (ESG), and push for green energy transition has propelled mining companies to reconsider their strategies. Over the past two decades, mining companies along the Bushveld Igneous complex in South Africa have been shifting towards mechanized mining methods which are generally safer and provide for the generation of greater volumes of output. Sibanye Stillwater’s Bathopele mine, which has a fleet of over two hundred and fifty (250) trackless mobile machinery (TMM) and a daily fuel consumption of approximately ten thousand (10 000) liters per day. The introduction of Internet of Things (IOT) technology in the fuel management system at Bathopele mine achieved benefits such as fuel consumption tracking, effective inventory management, prevention of fuel theft, detection of fuel leaks, determination of maintenance requirements and readily available access to fuel use data. This access to data enabled the mine to effectively apply for fuel use rebates from the South African Revenue Services (SARS) with ease. To determine the impact of the increased distance to underground working places on the refueling of TMM, the Theory of Constraints (TOC) method, qualitative and quantitative techniques were applied. A bivariate analysis conducted indicated a linear relationship between fuel consumption and production output at Bathopele mine, which suggests that an effective fuel management system had a positive impact on production output at the mine. A real-time or near real time model for fuel management in underground trackless bord and pillar mines in proposed.
Black Writings: The Modal Mixtape Sampling and Remixing the Ethos of South African Poor Theatre with the Film Medium
(University of the Witwatersrand, Johannesburg, 2022-03) Sono, Sipho Alex; Jansen van Veuren, Mocke
Let’s imagine I’m standing in a record store aisle, with all these nostalgic “records” of film and theatre that I’m too young and perhaps too black to be drawn to, but still somehow feel connected to. Not only that, but I can’t shake the feeling that these records have informed me as a South African and could form new work in a strong way. I'm trying to make a “song”, a cohesive language for my practice as a filmmaker, with an underpinning interest, ethos and an understanding of South African Poor Theatre. In my hand I have a Grotowski “record”, called Towards Poor Theatre (1976), that is the main sample for my track. I’m also “digging through crates”, looking at the Theatre of the Oppressed by Augasto Boal (1974) and other theories of theatre in film, to mix together to make the song. I’ve been listening to tracks by Athol Fugard and Barney Simon, as sources of inspiration. As Pharrell Williams describes chords as “coordinates pointing us to emotion” (2019) , I have begun to think that maybe plays such Woza Albert (1971) and Sizwe Banzi is Dead (1972 ) and their recordings for BBC (1982 and 1983) can serve as chords and indicators to the direction for my filmic practice. Although you might not find a section entitled “methodology” in this paper, what you will find is that it is underpinned by practice based research methodologies, in the interest of Walter Mignolo’s epistemology disobedience. In this paper, I employ DJ Lyneé Denise’s concept of The DJ Scholarship (2013) as a research methodology, which sees the paralleling between the roles of the research to those of a DJ, borrowing ideas and recontextualising them . I sample theatre concepts, ideas and theories to mix and remix them and eventually form my own knowledge around my filmic practice. This notion of deejaying also exists in the research question itself, as it seeks to attempt a blending of two artistic disciplines. It is further carried in the way I approach film and storytelling, through the editing process, cutting, scratching, loop and rewinding for further indentation. This research further makes use of auto-ethnographic methods for meaning making and epistemic disobedience. These methods are employed through personal anecdotes and reflexivity as additive interrogators and informers to the research exploration. This research project also makes use of the personal, in the research film as a means to explore therapeutic processes for film as well as an exploration of the personal as a political enquiry. Auto-Ethnography functions in the crux of this research, it is an inquiry of the self, as a black “born free” South African and my relationship with Poor and Protest Theatre as an inherited artistic voice. As I stand in the middle of this record-store of theoretical frameworks and literature, I am also analysing the “records” which pick and sample. I am studying them and thinking about what they represent and what they indicate about me and the ethos of my filmmaking practice in a traumatised, post-apartheid South Africa . So let’s get to mixing.
Bottom-half Intergenerational Mobility Among the Coloured Population in South Africa
(University of the Witwatersrand, Johannesburg, 2023) De Kock, Tryston; Roberts, Gareth
I examined the intergenerational mobility of education among the Coloured population in South Africa between 1975 and 1990. I used the National Income Dynamics Study to measure intergenerational mobility among Coloured children born to parents at the bottom of the education distribution-this includes parents with an educational attainment lower than grade 10. I found across the whole population; the median rank of education is grade 10 – making grade 10 my middle point. I compared several intergenerational mobility indices with bottom-half mobility and look at the IGE and IGC indices for sons, as well as the summary statistics for the coloured, African, and White populations. I suggested that Coloured daughters born to mothers in the bottom half of the education distribution have experienced a decrease in upward mobility meanwhile upward mobility has increased for Coloured sons. However, I suggested Coloured daughters born to parents with educational attainment lower than grade 10 have a higher chance of increasing their educational attainment compared to Coloured sons. I also compared mobility estimates between Coloured children born in the Western and Northern Cape with Coloured children born elsewhere. I found that Coloured children born in the former have lower upward mobility compared to Coloured children born elsewhere
Comparing the effectiveness of LSTM, ARIMA, and GRU algorithms for forecasting customer charging behavior in the electric mobility industry in Europe
(University of the Witwatersrand, Johannesburg, 2023) Pelwan, Robyne Chimere
Forecasting, a powerful technique for unveiling potential future events, relies on historical data and methodological approaches to provide valuable insights. This dissertation delves into the domain of electric mobility, investigating the effectiveness of three distinct algorithms—Long Short-term Memory (LSTM), Autoregressive Integrated Moving Average (ARIMA), and Gated Recurrent Unit (GRU)—for predicting customer charging behavior. Specifically, it focuses on forecasting the number of charges over a 7-day period using time-series data from European electric mobility customers. In this study, we scrutinize the interplay between algorithmic performance and the intricacies of the dataset. Root mean squared error (RMSE) serves as a metric for gauging predictive accuracy. The findings highlight the supremacy of the ARIMA model in single-variable analysis, surpassing the predictive capabilities of both LSTM and GRU models. Even when additional features are introduced to enhance LSTM and GRU predictions, the superiority of ARIMA remains pronounced. Notably, this research underscores that ARIMA is particularly well-suited for time series data of this nature due to its tailored design. It contributes valuable insights for both researchers and practitioners in the electric mobility industry, aiding in the strategic selection of forecasting methodologies.
Comparison of ultrasound and magnetic resonance Imaging findings in patients with suspected placenta accreta spectrum at Chris Hani Baragwanath Academic Hospital
(2024)
Background: Placenta accreta spectrum (PAS) is a serious condition that is increasing in prevalence with an increase in the caesarean section rate. This condition is associated with significant haemorrhage. Accurate diagnosis and adequate surgical planning are associated with favourable outcomes. Ultrasound and MRI are used in prenatal diagnosis of this condition. • Objectives: To compare ultrasound and MRI report findings with histopathology or surgical findings in patients with suspected PAS at Chris Hani Baragwanath Academic Hospital. To compare the diagnostic accuracy of PAS between the junior and senior (>5 years’ experience) radiologists’ MRI reports. Method: A retrospective comparison of 14 MRI and 18 ultrasound report findings of patients with suspected PAS were compared with histopathologic or surgical report findings. These imaging modalities' sensitivity, specificity, accuracy, true positive, true negative, false negative and false positive values were determined. The accuracy, sensitivity and specificity of MRI reports were determined based on radiologists’ experience. Results: Ultrasound correctly diagnosed PAS in 10/18(56%) of the patient reports. MRI correctly diagnosed PAS in 6/14(43%) of reports. Ultrasound reports had sensitivity and specificity of 90.9% and 28.6%, respectively, while MRI reports had sensitivity and specificity of 20% and 75%, respectively. The senior radiologists correctly diagnosed PAS in 3/7(42%) of reports, while junior radiologists correctly diagnosed PAS in 4/6(67.7%) of MRI reports. Conclusion: There was no statistically significant difference in the accuracy of Ultrasound and MRI in diagnosing PAS. There was no statistically significant difference in diagnosis of PAS between junior and senior radiologists
Complexities of the professionalisation process and ethics of community development in South Africa
(University of the Witwatersrand, Johannesburg, 2021) Ditlhake, Kefilwe Johanna; Pillay, Pundy
This thesis examined the professionalisation process complexities and ethics of community development in South Africa. The purpose of this study was to examine the current move to professionalise the community development sector to explain professionalisation process complexities, the tensions, challenges, and the values of community development in South Africa. The quest for professionalisation calls for the standardisation of knowledge, certifications, the establishment of occupational membership associations, and a system of self-regulation for community development practitioners and community workers into a formalised profession and be committed to serving the public interest. The professionalisation process of the community development sector was explicitly acknowledged in the White Paper on Social Welfare in 1997. In October 2011, the national Department of Social Development (DSD) organised a three-day Inaugural Summit held at the Vulindlela Village in Coega, Eastern Cape, which paved the way for the professionalisation process, and consulted stakeholders within the community development sector to plan the professionalisation process in this field. This summit was the first step undertaken towards the professionalisation process. The national DSD was mandated to lead, oversee and coordinate the professionalisation of community development. The Steering Committee, the South African Council of Social Service Profession (SACSSP), and the Task Team to professionalise community development in the planning and implementation process. The study adopted multiple case study designs to explore and explain how the community development practitioners, social workers, and community development workers view the professionalisation process complexities and the values of community development. This case study research took place in Gauteng at the local, provincial, and national levels of government. The four cases underpinning the study include the practitioners from non-governmental organisations (NGO), community development workers (CDWs) from the Department of Cooperative Governance and Traditional Affairs (COGTA), the provincial and national Department of Social Development (DSD), and the higher education institutions (HEI). The case study analysis focused first on each case separately (within-case analysis), including the connection of each case to the phenomenon underpinning the study. Understanding each case (within-case analysis) was essential to understanding the case context. By adopting multiple case study research designs, contributions to existing research on community development and the professionalisation process are made. The research questions underpinning the phenomenon under study are answered by accumulating findings from all four cases (cross-case analysis findings). Interviews and secondary data analysis were used to collect data. The interviews are the primary data source, and documentary analysis was used to corroborate the findings of the interviews. Non-probability purposive sampling and theoretical sampling were employed in this study. The empirics consist of seventy-four interviews with community development workers, social workers, and community development practitioners. The data analysis process followed the constructivist grounded theory constant comparison iterative and coding process, including two cycles of initial and focused coding. The theoretical codes developed in the study represent the foundation of the theory developed. Given the plethora of research in this field of study, the constructivist grounded theory data analysis process was applicable in generating the nascent theory that suits the nature of this inquiry. This study found that the professionalisation process was motivated by the need for status recognition and that the process is evolving as state regulation. Professionalisation process complexities are connected to the complex context of the history of the multidisciplinary nature of community development practice, lack of engagement and broader consultative processes, the qualification versus the occupational wider set of professionalisation processes, a crisis of status recognition, professional identity issues, the unclear scope of practice, and a lack of regulatory framework. Against this backdrop, challenges, tensions, turf issues, and contestations are identified. Including the ethical issues of conflict of interest, professional misconduct, and malpractice are raised as the major challenge of the evolving profession of community development practice. A substantive theory developed in this study is inductively theorised from data and contributes to existing research on community development professional practice. Based on the study findings, recommendations for policy and practice and further research are suggested
Condonation of non-compliance under section 67(1) of the competition act 89 of 1998
(University of the Witwatersrand, Johannesburg, 2023) Humphreys, Russell
The Competition Commission has long sought to extend its powers to investigate and refer complaints to the Competition Tribunal for prosecution. Prior to the decision of the Constitutional Court in the case of the Competition Commission of South Africa v Pickfords Removals SA (Pty) Limited 2021 (3) SA 1 (CC) (the ‘Pickfords’ case), the power of the Commission to initiate investigations and therefore refer matters to the Competition Tribunal was limited by section 67(1) of the Act. Those accused of breaching the Competition Act 89 of 1998 have, in their defence, relied on the limitations of section 49B of the Competition Act - the procedure for initiating a complaint and section 67(1) which provides for a time limitation on initiating/referring a complaint to the Competition Tribunal. The Constitutional Court in the Pickfords case considered whether in light of section 34 of the Constitution, section 67(1) of the Competition Act should be interpreted as an absolute bar (a prescriptive provision) or procedural time bar (capable of condonation). Section 67(1) was, however, amended in 2018 to limit the referral of a compliant to the Tribunal to no more than three years after the practice ceased. This paper considers the statutory limitations on the Commission to initiate and refer complaints to the Competition Tribunal in terms of sections 49B, 50, 67(1) and section 58(1)(c)(ii) and to examine how these limitations have been by interpreted by our courts
Cost utility analysis of long acting muscarinic antagonists (LAMAs) as an alternative to long acting beta agonists (labas) for treatment of severe COPD in the South African public sector
(2024) Thompson, Peggy
Objective- The study purposed to estimate the cost-effectiveness of Tiotropium, compared with Salmeterol and Indacaterol for chronic obstructive pulmonary disease (COPD) patients within the South African public sector. Methods- A global Markov model was adapted for the local setting and developed in Microsoft Excel. Transition probabilities and data on costs, resource use and effectiveness were obtained from literature. Outcomes were calculated for 3-years in the base case, then extrapolated over a 10-year and lifetime time horizon. A 5% discounting rate was applied according to local guidelines. Cost-effectiveness was estimated as the incremental cost per quality adjusted life year (QALY). One-way and probabilistic sensitivity analyses were conducted to consider model uncertainty. Results- When compared with Indacaterol (300µg), Tiotropium was dominant (less costly and more effective) across all time horizons. Conversely, Tiotropium was not cost-effective when compared with Indacaterol (150µg) and dominated by Salmeterol over the 3- and 10-year time horizons. The resulting ICURs exceeded the estimated willingness to pay thresholds for all scenarios. The deterministic sensitivity analysis revealed the new intervention cost and utility for mild COPD impacted most on intervention cost effectiveness. Conclusion- Tiotropium was deemed not cost-effective at the proposed price, when compared to usual care for COPD. A price reduction should be considered, to determine the feasibility of displacing existing maintenance therapies. Indacaterol 150µg appeared more cost-effective at the current price and effectiveness demonstrated.
Decentralisation in Cameroon and the Anglophones’ Struggle for Autonomy
(University of the Witwatersrand, Johannesburg, 2023) Epongo, Emmanuel Makia; Van Nieuwkerk, Anthoni
In Cameroon, decentralisation was introduced in 1996 to promote development, democracy and good governance at the local level. However, decentralisation exacerbated conflicts between the Anglophone minority and the Francophone-majority government, resulting in a civil war in 2017. Therefore, this research explores how the implementation of decentralisation in the two Anglophone regions exacerbated conflicts between the Anglophone minority and the Francophone-majority government. Despite the growing literature on decentralisation and conflicts, very little research has been conducted on conflicts arising from former independent colonial territories that reunited under a federal system and later evolved to a decentralised unitary system, a shortcoming addressed by this research. This study used qualitative methodology and a case study design. The research was conducted at the Kumba and Bamenda city councils in the Southwest and Northwest regions, respectively. Participants were selected through purposive and snowball sampling techniques for semi-structured interviews. Data from interviews, observation and archival documents were merged and analysed through thematic analysis. The findings suggest that decentralisation in the Anglophone regions is more of deconcentration than devolution. Understanding how decentralisation increased intrastate conflict between the Anglophone minority and the Francophone-majority government could have a broader significance for researchers, governments and policymakers seeking to mitigate conflicts, particularly in Africa, with diverse societies prone to intrastate conflicts
Determination of U and Th Radioisotopes in environmental samples by ICP-QMS
(University of the Witwatersrand, Johannesburg, 2023-07) Rikhotso, Xikhongelo Valentia; Sehata, James; Chimuka, Luke
Not Available
Development of a multi-disease targeted next generation sequencing panel to study genetic aetiology of rasopathies
(2024) Mudau, Maria Mabyalwa
With Next Generation Sequencing (NGS), technologies it is now possible to screen a large number of genes simultaneously through massively parallel sequencing, significantly reducing costs and time generally associated with mutation screening. After an informal survey of the diagnostic needs of the clinicians in the Division of Human Genetics, National Health Laboratory Service (NHLS), it was established that the aetiology of genetic disorders called facial dysostoses, RASopathies and Cohesinopathies (FRASC) could be understood better using NGS. These are developmental disorders that are phenotypically different and are commonly referred to our genetic clinic, currently there is limited genetic testing for these conditions in South Africa. A NGS panel targeting genes associated with the FRASC disorders was designed and optimised. Upon successful optimisation the panel was then utilised to sequence samples from patients presenting with features suggestive of RASopathies. An overall detection rate of 56.6% (34/60) was obtained for all RASopathy patients sequenced in the current study. Detection rate of 46.7% (7/15) for neurofibromatosis type 1 (NF1) patients and 60% (27/45) for patients with non-NF1 RASopathies was obtained. No clinically significant variants were identified in 26 of the 60 patients (43.3%), two of the 26 had a VUS in the MAP2K1 gene. Seven patients of the panel negatives were successfully sequenced using whole exome sequencing (WES), one patient had a pathogenic variant and the rest had variants of uncertain significance identified. This is the first report profiling mutations and clinical features in patients with RASopathies as a whole in South Africa, compared to a study focusing on NS patients only. The detection rates obtained were comparable to other international studies using NGS, except for detection rate of LZTR1 and BRAF1 gene variants observed in Noonan syndrome patients. The (35/60) 58.3% (panel and WES) of patients with a disease causing variant identified in this study now have a molecular confirmation that they previously did not have. Our results show that a targeted panel could be an effective first-line diagnostic testing for RASopathies in SA. The development of the multi-disease targeted panel in the current study has contributed to the design of the 500 gene inherited disease NGS targeted panel (IDP) that is currently being utilised in our facility for diagnostic testing of various monogenic disorders.

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Browsing 4. Electronic Theses and Dissertations (ETDs) - Faculties submissions by SDG "SDG-17: Partnerships for the goals"

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