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Modelling the dynamics of Breast Cancer disease with hormone therapy and surgery controls
Get PDFIn this study, we discussed a mathematical model that incorporates important interactions between normal cells, tumor cells, immune cells, and estrogen. The mathematical model was revised to include two control measures; namely surgery and hormone therapy to minimize the number of tumor cells. The model was mathematically analyzed with the premise that the two control measures are positive constants. Locally and globally analyses were performed using a variety of analytical methods to investigate the stability of the breast cancer model. Furthermore, an optimal control problem was formulated and used to determine the best strategy for reducing the number of tumor cells by incorporating hormone therapy and surgery, based on the well-known Pontryagin’s Maximum Principle. The numerical results indicates combining both optimal control measures (surgery and hormone therapy) simultaneously is more efficacious than using single control measure separately in decreasing the number of tumor cells.Thesis (MSc) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 202
A fraud investigation skills self-assessment framework for internal audit practitioners
Get PDFGlobally incidents of fraud are on the increase, resulting in an expectation from users of internal audit services that internal auditors should accept responsibility for conducting fraud investigations. This expectation exists even though limited guidance pronouncements on how to conduct fraud investigations being available from the Institute of internal auditors (IIA) and internal auditors not always being equipped to conduct fraud investigations. This expectation also stretches beyond the current pronounced role and responsibilities of internal audit practitioners, according to the IIAs International Professional Practices Framework (IPPF) (hereafter, referred to as the Standards). Conducting fraud investigations without possessing the relevant knowledge and skills, introduces the risk that evidence collected may be considered inadmissible in a court of law. The research problem is stated as, “a dearth of adequate guidance pronouncements for internal audit practitioners exists, in respect of fraud investigations.” In response to the expectation, risk, and research problem, underpinned by the policeman theory and theory of inspired confidence, the primary research objective of the study was to develop a fraud investigation proficiency self-assessment framework for use by internal audit practitioners who are expected to conduct fraud investigations. The study’s research objectives were achieved by making use of an interpretivist research paradigm and a qualitative methodological approach. Data were collected through semi-structured interviews from authoritative internal auditors on the membership database of the Institute of Internal Auditors South Africa (IIASA). Findings confirmed the existence of an expectation gap and the lack of guidance contained in IIA guidance pronouncements and Standards. Developed from the findings, the thesis proposes a fraud investigation proficiency self-assessment framework. The proposed self-assessment framework lists 14 fraud investigation knowledge and skills measures in the form of statements that internal audit practitioners should use to assess their personal level of proficiency for conducting a fraud investigation. The results from the self-assessment should then be Page | vii used to guide an internal audit practitioner on whether to accept the responsibility for conducting a fraud investigation or to defer the investigation to a more proficient fraud investigator. The decision for accepting the responsibility to conduct a fraud investigation ultimately resides with the internal audit practitioner. The study concluded that an expectation from organisations exists for internal audit practitioners to conduct fraud investigations, even though limited guidance pronouncements are available to internal audit practitioners from the IIA for conducting fraud investigations. The study identified that the most prominent risk associated with a fraud investigation being conducted by a person lacking the required fraud investigation knowledge and skills was that of collected evidence being dismissed in a court of law and not being able to use the evidence against a perpetrator. It can, therefore, be recommended that internal audit practitioners should not conduct a fraud investigation if they lacked any of the proficiencies required. The study provides support for the development and use of the proposed fraud investigation proficiency self-assessment framework.Thesis (PhD) -- Faculty of Faculty of Business and Economic Sciences, 202
A reconceptualised perspective of the six-step financial planning process
Get PDFThe globally applied six-step financial planning process which is used by CFP® professionals to provide financial advice is designed to ensure that the financial advice is suitable, based on the needs of the consumer. However, given the diverse cultures in South Africa, this study argues that the six-step financial planning process (as it is currently applied) may not be suitable, as it requires contextualisation based on the unique needs of South African consumers. The various population groups in South Africa have their own sets of beliefs, values and cultural practices, and thus view aspects such as wealth (the creation, preservation and transference thereof), marriage, death and retirement, differently. Thus, financial planners who are not knowledgeable about different cultures, diverse financial needs, or the provisions of customary law, may not be able to provide suitable advice. The primary objective of the study is thus to reconceptualise the six-step financial planning process to be more inclusive, in order to better serve the financial planning needs of South African consumers. A comprehensive literature review was undertaken to provide the context and framework within which the reconceptualisation of the six-step financial planning process could be approached. An investigation of the financial planning environment and the financial planning process was completed to determine how the six-step financial planning process is currently applied in the South African context. Further, an investigation of culture and the cultural dimensions – power distance, uncertainty avoidance, individualism, masculinity, timeorientation and indulgence – was conducted, as it was clear that these cultural dimensions cannot be generalised to all South African consumers, due to the large degree of diversity within the population. It was also determined that there are various factors that contribute towards the cultural diversity of South African consumers, which may influence their financial needs and the type of financial advice that is required. These factors include race and ethnicity, marital regimes, procreation and family structures. To further illustrate the diversity of financial needs of South African consumers, a discussion of Black households and the application of financial planning legislation and customary law was provided. Black households are considered to be under-serviced, historically financially excluded, have low levels of financial literacy, and are mostly collectivist in nature. It is for these reasons that Black households are the focus of the study. Some of the financial needs that vi are common among Black households include land and property ownership, family wealth, family homesteads, lobola capital and ‘black tax’ expenditure. Given that the literature review established how the six-step financial planning process is currently applied, an interpretivist research philosophy was adopted in order to gain a deeper understanding of how the six-step financial planning process should be applied in a South African context. Further, the research approach in the context of this study is an inductive one, as the six-step financial planning process is an existing theory that was reconceptualised by considering the perceptions and experiences of 16 CFP® professionals and 14 Black South African households. A mono-method qualitative research methodology was used, with a single qualitative method of data collection (semi-structured interviews), and a single qualitative method of data analysis (latent content analysis). The findings of the study were used to provide a reconceptualised perspective of the six-step financial planning process which takes into consideration the fact that the image of a financial planner plays an important role when trying to establish a professional relationship with a client. The findings reveal that Black consumers in particular, generally have a negative image of a financial planner, which is influenced not only by their perceptions of a financial planner, but also by their self-perception of their own financial situation. The reconceptualised perspective of the six-step financial planning process also incorporates the finding that discussions around personal finances are considered impolite and taboo among the Black African community, which influences their ability to talk about these topics, trust a financial planner, and establish a professional relationship with them. The findings also reveal that a racial and gender bias exists among Black consumers – they prefer interacting with a White male financial planner, as they perceive them to be more competent and have more experience with finances and wealth accumulation. It was also found that CFP® professionals believe that having cultural awareness and cultural intelligence can reduce bias in the way that questions are asked, so as not to offend the client. Thus, cultural awareness was also incorporated into the reconceptualised perspective of the six-step financial planning process. It was also noted that it is important to ascertain clients’ level of financial literacy during the information gathering stage. Black consumers opined that in this regard, it is the role of the financial planner to both ascertain and ensure their clients’ financial literacy, and to offer financial education to ensure client understanding. vii Although the premise of the study is that South African consumers have unique financial needs due to the high degree of diversity among the population, it was the opinion of CFP® professionals that Black consumers, in particular, do not have unique financial needs – instead, they define their needs differently, have different exposures to financial resources to address their financial needs, and also prioritise and satisfy their needs differently. The prioritised financial needs of Black households (sub-themes) that emerged from both participant groups include the need to make provision for black tax, estate planning, funerals, and property ownership. Black household participants mentioned (to a greater extent than CFP® professionals did) the need to make provision for lobola and initiation schools, as these form part of several traditional ceremonies. The need to make provision for a family home was mentioned by Black household participants but not by CFP® professionals. It was discovered from Black household participants that stokvels are the most common micro-finance tool used by Black consumers, for various reasons. In fact for some, stokvels are preferred over formal financial products because they perceive that they yield a higher return, and others use them successfully to supplement their current provisions. These findings (among others) were incorporated into the reconceptualised perspective of the six-step financial planning process which is presented in this study. This study has made a contribution to the financial planning body of knowledge by presenting a reconceptualised perspective of the six-step financial planning process, and providing new knowledge on each of the associated six steps and their suitability in a South African context. This study also provides justification and evidence for the inclusion of aspects within the sixstep financial planning process that enhance the understanding of cultural diversity and needs of Black households in particular. Justification has also been provided for the inclusion of cultural aspects and diverse needs of Black consumers the in the academic curriculum of FPI and FSCA recognised qualifications, as well as the facilitation and learning outcomes of business and product-specific training that FSPs are required to provide to their representatives. The study findings also have implications for the development of the academic curriculum and assessment materials for CFP® professionals by recognised education providers, the FSCA regulatory examination, and the FPI professional competency examination. In addition, the study has provided evidence for the need to develop financial products, or customise existing financial products, that address the viii needs of Black households – especially culture-specific financial needs such as black tax, lobola and funding for initiation schools.Thesis (PhD) -- Faculty of Faculty of Business and Economic Sciences, 202
An exploration of the Participatory Guarantee System (PGS) facilitating the growth and certification of small-scale organic farmers: Giyani, Garden Route and Overberg case studies
Get PDFIn this study, I evaluated the Participatory Guarantee System (PGS) as a framework to support the growth and certification of small-scale organic farmers. I used the interpretivism and constructivism lenses to understand the PGS from the perspective of members of three PGS groups. The research was qualitative, treating the three PGS groups as case studies. I collected data using focus groups, semi-structured interviews, questionnaires, field notes and observations. The theoretical frameworks that guided the research and data analysis were Socio-ecological Systems (SES) based principles and the Multi-Level-Perspective (MLP) framework. The data were analysed using Atlas.ti content analysis software. The key results were grouped into four themes: capacity; market and logistics; learning process; and disturbance, shock and stress. The theme of ‘capacity’ dealt with the functioning of a PGS, where three categories were identified: group composition and capacity; resource limitations and institutional support; marketing and consumer education. The more diversity in age, education and culture of PGS stakeholders, the better performance and chances of continuity and propagation. PGS has limited capacity partly due to its voluntary nature and infancy. It needs institutional support to grow and be useful for members. Department of Agriculture extension officers knew little about organic farming, thus limiting their engagement and assistance to such farmers. The theme of ‘market and logistics’ looked at the various factors that influence the farmers’ market reach. The perception from the members was that there was minimal consumer awareness about organic agriculture and the PGS. The marketing of organic produce relied largely on the individual farmer’s efforts and ability to search for and secure markets. The theme of the ‘learning process’ was categorised into learning and knowledge exchange. Members of the PGS groups highly regarded the invaluable knowledge shared through farm visits and online platforms, such as their WhatsApp groups. This knowledge improved and informed their farming techniques and led to the growth of v their skill base and experimentation. They viewed the way knowledge was exchanged as non-threatening and highly useful. The fourth theme of ‘disturbance, shock and stress’ dealt with the effects of COVID19. The three groups were all affected by lockdown restrictions (at the time of data collection) and were initially cut off from their usual markets. This led to a loss of income, loss of farm staff and a loss of the desired growth of the farms. The group’s diverse farming practices bolstered their resilience, enabling them to adapt and try alternative marketing strategies.Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 202
Exploring the role of livelihood diversification of household food security in Umzimvubu Local Municipality
Get PDFThe study sought to explore the role of livelihood diversification for household food security in rural communities of Umzimvubu Local Municipality for sustainable development. The study adopted an interpretive paradigm as it gave the researcher appropriate information from a group of participants who better understand the livelihood assets. The qualitative research approach was adopted for the study due to its ability to appreciate the opinions, feelings and experiences of distinct individuals in order to give meaning to their behaviours. To gain better inferences and insights into this phenomenon, the researcher used semi-structured interviews with smallholder farmers who depend on practising farm activities for their livelihoods. The findings of the study revealed that due to retrenchment and the increase in unemployment rate, families are experiencing income inadequacy that has urged rural households to engage mostly in on-farm activities as a way of generating income and supplementing their livelihoods to sustain their families. Additionally, the findings unveiled that the efforts by government as well as non-government stakeholders to mitigate the effects of poverty by introducing the local entrepreneurs to the formal market, were evident. However, there are no consistent and stable programmes and policies to extend the market, or to encourage commercial farmers and smallholder farmers to work together to improve rural economies and transfer the much-needed skills to subsistence farmers. The study recommends that the government should play a leading role in capacitating rural communities and adequate funding should be made available to execute off-farm and non-farm activities to tackle the issues of food security and eliminating poverty. Also, with the emergence of a changing climate, there is a need for the Eastern Cape government to erect irrigation schemes, which can be done to sustain on-farm production and productivity for the rural communities. There is a need for the government to facilitate the introduction of stable and consistent programmes and efficient and effective policies which will enforce the commercial and small-holder farmers to work together and ensure that the much-needed skills and expertise are transferred to the marginalised group whilst improving the rural economy and meeting the market demands.Thesis (MA) -- Faculty of Business and Economic Sciences, School of Economics, Development and Tourism, 202
Main thesis title: An assessment of the quality of the service delivery effort in the Nelson Mandela Bay Municipality
No full textThe provision of services to people in South Africa is a constitutional right that all spheres of the South African government are bound to. South Africa’s Bill of Rights also lays it out that all SA citizens are entitled to these services. The functions of the national, provincial, and local spheres of government are to ensure that all that the Constitution and Bill of Rights promise, are provided and implemented. Service delivery is therefore a mandated activity that all municipalities are obligated to provide to their residents locally. The primary objective of this study is to assess the quality of the service delivery effort from the Nelson Mandela Bay Municipality (NMBM). The study was conducted by using a qualitative case study approach. A total of 12 participants were chosen for the study and in-depth interviews were implemented as data collection tool to accomplish the study’s objectives. The qualitative data analysis tool Atlas.ti was employed to present emerging themes from the collected data. The findings of the study highlighted the challenges experienced in the NMBM prevent a high level of service delivery to residents. The study participants agreed that the service delivery effort in the NMBM is below that what the various stakeholders, mainly the residents, expected. The effective management of the limited financial and human resources are the major themes that emerged during the interviews. The study recommends that the service delivery value chain be reviewed, and that policies and strategies be genuinely implemented. The study also suggests that proactive communication with residents be improved.Thesis (MBA) -- Faculty of Business and Economic Sciences, Business School, 202
Arts-based participatory research for more equitable ocean governance in South Africa
No full textThis 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, 202
Assessing the effects of materials management practices on performance of locomotive manufacturing firms in Gauteng province
Get PDFThe study assessed the effects of materials management practices (materials planning, procurement, availability, handling, and delivery) on the performance of rail rolling stock and locomotive manufacturing firms in Gauteng Province. The study also investigated the causes of delays in supply of materials in the rail rolling stock and locomotive manufacturing industry in Gauteng. The research design employed was both descriptive and explanatory, using a quantitative research approach in which online surveys were conducted on a sample of 200 respondents from the rolling stock manufacturing firms in Gauteng. Descriptive statistics performed through SPSS 27 and SEM performed through AMOS 26 were used for data analysis. The findings of the study revealed that materials management practises were implemented in the rail rolling stock and locomotive manufacturing industry. According to the results, materials availability and materials handling have positive and statistically significant effects on the performance of rail manufacturing firms in Gauteng Province. However, materials planning, procurement and delivery practices have no significant effect on the performance of rail manufacturing firms in Gauteng Province. Therefore, the results reveal that firm performance is driven by materials availability and materials handling. In addition, late delivery of materials to the production line was found to be the main cause of project delays. The study thus offered a contrasting perspective to the general findings that show materials management practices to be a significant contributor to manufacturing firm performance. However, the study confirms the importance of materials handling and availability as a predictor of performance in manufacturing firms.Thesis (MCom) -- Faculty of Business and Economic Sciences, School of Management Sciences, 202
Perceived critical factors impacting digital literacy at a South African automotive manufacturer
Get PDFThis treatise explores the critical factors affecting digital literacy within a South African Automotive Manufacturer. Previous research conducted within the organisation revealed that employees were not using digital tools to its full potential, and according to the literature, digital capabilities are one of the main drivers for organisational agility. There is a lack of research on digital literacy and organisational agility in a South African automotive context. As technology progresses rapidly, organisations must innovate to remain agile and relevant. This qualitative research study was conducted through a constructivist worldview, allowing the researcher and participant an opportunity to interact during an interview session to uncover experiences and thoughts relating to digital literacy within the organisation. The study enrolled 14 participants, and this was sufficient to achieve meaningful saturation of the data. The study highlighted low confidence levels in technology adoption within the organisation, often causing anxiety and apprehension among employees. This psychological barrier stems from a lack of digital literacy skills underpinned by insufficient training to fully understand the benefits technology may provide to the user and the organisation. The lack of awareness may be linked to ineffective communication techniques the organisation employs when relaying training or information relating to available resources. Furthermore, to enhance digital literacy skills, the study found that individuals need to have good foundational knowledge from which to build and have supportive leadership that assists in acquiring the necessary resources and training. This study provides insights into digital literacy within a South African Automotive Manufacturer. It will allow management to develop strategies to improve digital literacy levels and establish a learning culture where employees have higher levels of self-efficacy. When an organisation embraces digital technology, it increases productivity and fosters innovation.Thesis (MBA) -- Faculty of Business and Economic Sciences, Business School, 202
Immigration and human development outcomes in post-apartheid South Africa
Get PDFImmigration 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, 202