Diversion Programmes and Empowerment: A Case Study of Young Offenders’ Experiences in the Buffalo City Metropolitan and Amathole District Municipalities in the Eastern Cape Province of South Africa
- Authors: Mangwiro, Vongai P
- Date: 2020
- Subjects: Social work with criminals Social work with juvenile delinquents
- Language: English
- Type: Thesis , Doctoral , PhD (Social Work)
- Identifier: http://hdl.handle.net/10353/18031 , vital:42006
- Description: Crime amongst the young in South Africa has been high since the attainment of democracy in 1994. Diversion programmes were established through the National Framework Chid Justice Act of 2008, as part of a plethora of measures to curb the ever spiralling problem of crime amongst the youth. The purpose of this thesis was to investigate the experiences of young offenders regarding their empowerment vis-à-vis diversion programmes in the Buffalo City Metropolitan and Amathole District Municipalities in the Eastern Cape Province. Underpinned by the Empowerment and Social Control Theories, the study adopted a qualitative research paradigm and used focus group discussions and in-depth interviews amongst thirty-five young offenders and five social workers, who work as probation officers at NICRO, to collect data, which was analysed using thematic analysis. The major findings indicated that diversion programmes are effective in reducing the number of children who commit crimes in these two municipalities and in influencing their behavioural change, resulting in fewer chances of re-offending. The Life Skills Programme was identified as the most effective programme, in comparison to the other programmes, such as the Community pre-trial Service Programme, in changing the behaviour of the young offenders, as it helps them to discover themselves; learn respect for the self and others in the community; help with family and community reintegration; and helps them focus on who they want to be in the future. In spite of such positive attributes for the diversion programmes, the study observed that there are challenges being faced by the implementing organisation, NICRO. These include high caseloads; lack of support from the probation officers who refer young offenders; limited support from parents; paucity of financial resources; lack of transport; poor v coordination from the courts; and delays in the implementation of some accredited but not credited programmes. Overall, the study concluded that diversion programmes in the Buffalo city Metropolitan and Amathole district municipalities in the Eastern Cape suffer due to weak partnerships between different organisations and stakeholders that are supposed to complement the efforts of the judiciary. From the research findings above, it is recommended that the Child Justice System should promote a multi-sectored approach in order to restore and reunify all the stakeholders, working with children in conflict with the law. This adds more roles and responsibilities for the various stakeholders, such as the Department of Justice and Department of Social development. Furthermore, there is a need to increase the monitoring and evaluation of diversion programmes to advance accountability and improve effectiveness; and there is a need to enhance the efficiency of accrediting authorities to timeously accredit other diversion programmes that, so far, have not yet been accredited, but may be useful in empowering young offenders. Therefore, the study proposes an extension of the framework with additions of strategies to support diversion programmes at NICRO, through a stakeholder extension to the model allocating more roles and responsibilities for stakeholders in the Child Justice system, in order for diversion programmes to effectively achieve desired goals.
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- Date Issued: 2020
Do submarine canyons influence the structure and diversity of benthic fish assemblages on the continental shelf edge?
- Authors: Nyawo, Mpilonhle Aura June-Rose
- Date: 2020
- Subjects: Submarine valleys , iSimangaliso Wetland Park (South Africa) , Biotic communities -- South Africa -- iSimangaliso Wetland Park , Groundfishes -- South Africa -- iSimangaliso Wetland Park , Marine ecology -- South Africa -- iSimangaliso Wetland Park
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/167264 , vital:41462
- Description: Marine ecosystems play an important role in human welfare, such as providing food security and providing social, economic and environmental benefits to an increasing human population. However, due to the deleterious impact of overfishing as well as habitat degradation, pollution and climate change, many marine ecosystems and the substantial biodiversity they support, are under increasing threats. Submarine canyon ecosystems cut into the continental margin in all our oceans and are considered regions of enhanced diversity, abundance and biomass for many marine communities, including fish. In South Africa, the tropical Delagoa Ecoregion is characterised by numerous submarine canyons that are home to coelacanths Latimeria chalumnae, and a variety of commercially important line fish species. However, there is currently a lack of information on the ecological structure and functioning of these canyons, in relation to nearby non-canyon ecosystems. The aim of this thesis was to generate knowledge on the role of submarine canyons in influencing the benthic fish assemblage structure and diversity on the continental shelf and shelf edge within the high-latitude coral reef ecosystems in the tropical Delagoa Ecoregion of South Africa. First, a systematic literature review was conducted to examine the current knowledge on the role of submarine canyons on the benthic fish assemblages occurring on continental margins, as well as outline the trends in canyon research. For the fieldwork component of this thesis, baited remote underwater stereo-video systems were utilised to gather data. The first research chapter, chapter 3, investigated the effect of ecosystem and depth on the diversity and structure of benthic fish assemblages within iSimangaliso Wetland Park in the Delagoa Ecoregion. Data were collected in 2017 from Wright Canyon (canyon ecosystem) and adjacent slope ecosystems around the canyon (non-canyon ecosystem) at depths ranging between 70–240 m. The second research chapter, chapter 4, data were collected in 2018, from 60–100 m depths in three ubmarine canyons (Wright, Diepgat,Levens) and their adjacent habitat within iSimangaliso Wetland Park to investigate the diversity patterns and community structure of benthic fish and cons ider location as a factor. The systematic review showed that canyon research is still very much in its infancy, however more papers are expected to be published in the future. There were clear location associated biases detected, with more than 90% of the canyon research being concentrated in the Mediterranean Sea, while only one study was published from South Africa. Most of the reviewed literature focused on invertebrates, with benthic fish (including cartilaginous fish) being the second most studied taxa. A wide range of methods from both fishery- dependent and fishery-independent categories were used to gather the data of benthic fish from the canyons and adjacent areas. With over 8500 submarine canyons mapped globally, the number of submarine canyon research published and the detected location bias is of great concern. More studies are needed in order to understand the role of submarine canyons on adjacent slope habitats Overall, the results from the research chapters indicated that there were higher a bundances in the canyon ecosystem compared to the non-canyon ecosystem. In contrast, evenness and beta-diversity were higher in the non-canyon ecosystem. Relief, bottom type as well as depth played a major role in explaining the observed abundance and diversity patterns. Both evenness and beta-diversity decreased with increase in depth. The canyon and non-canyon also differed in terms of habitat structure. The canyon ecosystem was characterised by patched reef and reef habitats with high relief whereas the non-canyon ecosystem was characterised by flats and habitats, especially at shallower depths. Additionally, there were clear differences in terms of the fish community structure between the canyon and the non-canyon ecosystem. The heterogeneous and complex habitats of the canyon ecosystem were typified by species such as Epinephelus poecilonotus, Polysteganus coeruleopunctatus and Chrysoblephus puniceus in comparison to the less complex habitats outside the canyons that were preferred by species such as Lagocephalus sceleratus, and Rhinobatos leucospilus. The different locations sampled demonstrated that the canyon effect was not onsistent at all locations, with varying results detected in the different sample locations. This research demonstrates that clea r differences exists between the benthic fish assemblages associated with canyon and non-canyon ecosystems and provides important information on the role of submarine canyons in the iSimangaliso Wetland Park. From this thesis, it is clear that a ‘canyon effect’ exists in the continental shelf and shelf edge. The results suggested that heterogeneity of habitats was the most important environmental factor that differed between the canyon and non-canyon ecosystems and these differences in the habitat were driving the observed patterns. This thesis has provided a reference point, with regards to investigating the role and influence of these canyons on benthic fish assemblages occurring on the continental shelf edge. The information provided by this thesis can ultimately be used in other studies investigating benthic fish assemblages in other submarine canyons within iSimangaliso Wetland Park and the rest of South Africa./
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- Date Issued: 2020
Does the construction of ‘rapeable’ bodies constitute an instance of hermeneutical injustice?
- Authors: Weiffenbach, Michaela
- Date: 2020
- Subjects: Zuma, Jacob -- Trials, litigation, etc. , Rape -- Philosophy , Women's rights -- Africa , Women, Black -- Social conditions -- Africa , Masculinity -- Africa , Men, Black -- Africa -- Psychology , Justice (Philosophy)
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/145708 , vital:38460
- Description: This thesis argues that within the conventional imagination of the West, identity functions in a way that particular forms of embodiment are characterised by the experience of endured sexual vulnerability, which I argue is best understood as the construction of ‘rapeable’ bodies (Cahill 2001, 120). By this, I mean that the threat of rape is contingent upon the social and political construction of one’s identity as vulnerable. In virtue of this particular way of constructing the embodiment of certain subjectivities, there is an instance of hermeneutical injustice conferred (Fricker 2007, 114). I inquire into the function and meaning of stereotypic generalisations, prejudice and rape myths embedded within the dominant framework of the West and show how language and representation constructs these identities as ‘rapeable’. Furthermore, I consider how collective hermeneutical discourses construct Blackness, specifically Black masculinities and the construction of the ‘un-rapeable’ Black femxle body. To see how these ideas are congruous the prominent example that occurred in South Africa in 2005, namely, the Jacob Zuma rape trial comes to mind. One relevant feature of the case is that it shows how identities of race are constructed in the aftermath of apartheid and points to a Western collective imagination resistant to change. In addition, it demonstrates the triad of interrelatedness holding between the self-world-other, a relationship constituted mutually by the self and the socially constructed interpretations of identity and embodiment (du Toit 2009, 58). Lastly, the construction of ‘rapeable’ bodies is an example of how discursive narratives construct particular identities as vulnerable through rendering particular embodied subjects as sexually irrelevant and hermeneutically obscured.
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- Date Issued: 2020
Domestication of the international-law prohibition of child soldiering
- Authors: Govender, Nikita
- Date: 2020
- Subjects: Child soldiers (International law) , International law , Humanitarian law
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/48982 , vital:41572
- Description: Children and their participation in armed conflict or the ‘child soldiering phenomenon’ as referred to throughout this dissertation is a global crisis which has been inadequately regulated by international law. Customary international law and the three branches of public international law (international humanitarian law (IHL), international human rights law and international criminal law (ICL)) which purport to regulate this phenomenon are not lacking in their substance but rather in their coherency. Four core aspects of the existing international child soldiering norms are identified by this dissertation as being worthy of concern since they unduly prejudice children. These four core aspects being the definition of a child, the nature of child recruitment or enlistment, the nature of child participation in armed conflict and the nature of the obligation on States to prevent child soldiering. The norms established in terms of the abovementioned branches of law not only span across various international instruments within each branch of public international law, but the standards established conflict with one another to the detriment of the children to which it purports to extend protection. States which ratify these instruments therefore find themselves bound to conflicting international obligations insofar as child soldiering is concerned. The question thus becomes how these States, whether monist or dualist, ought to implement such fragmented and conflicting international obligations at national level. Following consideration of the existing State practice, it is evident that the way in which States choose to establish national law based on international obligations is pivotal. Notwithstanding their binding international obligations, States may adopt national legislation in such a way that the existing lacunae and the legal conundrums caused by those conflicting norms are circumvented. In order to assist States to establish national legislation in this way, the question becomes whether or not a model law on child soldiers could serve this purpose. This study determines that the quandary posed by model laws, specifically in relation to the broad interpretative leeway afforded to States, makes it an unsuitable solution to assist States to implement their international obligations in a less fragmented and less inconsistent way. As a model law proves to be an unfeasible solution, this dissertation seeks an alternative solution in the form of a manual on child soldiers. This study concludes that such a manual of which the substantive norms are based on binding treaty law and non-binding soft law, serves as a more appropriate solution. The manual, which shall be based on the notion of “the best interests of the child”, ought to adopt one uniform and consistent approach regarding the regulation of child soldiering, particularly insofar as it ought to extend an unfettered protection to all children. To ensure that such an unfettered protection is maintained throughout the manual, guidelines on the specific substantive norms of the manual are provided by this dissertation. Each guideline considers each of the four core aspects of the existing international child soldiering norms identified by this dissertation as unduly prejudicing children. Finally, this dissertation concludes that the lacunae in the existing international child soldiering norms contribute to the realities on the ground and the starting point in bridging this gap is at State level. It is therefore the overarching recommendation of this dissertation that a manual on child soldiers be established to assist States to implement and subsequently enforce their international child soldiering obligations in a less fragmented and less inconsistent manner.
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- Date Issued: 2020
Dynamics of stimulated luminescence in natural quartz: Thermoluminescence and phototransferred thermoluminescence
- Authors: Folley, Damilola Esther
- Date: 2020
- Subjects: Thermoluminescence , Quartz
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/146255 , vital:38509
- Description: Natural quartz has remained an important mineral that is of topical interest in luminescence and dosimetry-related research. We investigate the dynamics of stimulated luminescence on this material through thermoluminescence (TL) and phototransferred thermoluminescence (PTTL). Measurements were made on unannealed natural quartz as well as quartz annealed at 800 and 1000̊C. The samples were annealed for 10 minutes and for 1 hour. The material, in its un- and annealed state has its main peak between 68 and 72̊C when measured at 1Cs ̃1 after a dose of 50 Gy. A study of dosimetric features and kinetic analysis was carried out on two prominent peaks, peak I and III for all the samples. The peaks show a sublinear dose response for irradiation doses between 10 and 300 Gy. Kinetic analysis shows that peak I is a first-order peak and peak III a general-order peak. Interestingly, we observe for peak I for the sample annealed at 800̊C for 1 hour an inverse thermal quenching behaviour. We demonstrate that a peak affected with an inverse thermal quenching-like behaviour can still show effect of thermal quenching when the dose the sample is irradiated to is significantly reduced. We ascribe the apparent dependence of thermal quenching on dose to competition between radiative and non-radiative transitions at the recombination centre. Peaks I, II, and III for all the samples were reproduced under phototransfer when the peaks, initially removed by preheating to a certain temperature are exposed to 470 and 525 nm light. The infuence of duration of illumination on the PTTL intensity of these peaks corresponding to various preheating temperatures is modelled using coupled first-order dfferential equations. The model is based on systems of acceptors and donors whose number and role depends on preheating temperature
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- Date Issued: 2020
Early diagnosis of colorectal cancer using gold nanoparticles : a pilot study
- Authors: Noguda, Njabulo
- Date: 2020
- Subjects: Colon (Anatomy) -- Cancer -- Diagnosis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/48577 , vital:40892
- Description: Introduction: Colorectal cancer (CRC) is ranked amongst the top three most diagnosed cancers in humans worldwide. Colorectal cancer is the fourth most common cancer in South Africa and the sixth most common cause of death. If diagnosed during the early stages, the 5year relative survival rate can be as high as 90%. However, in most cases, the diagnosis is only made at a later stage when the cancer has metastasised, as the detection depends on the symptoms and non-specific screening. Many attempts have been made to achieve an early detected of CRC. Aim: To induce CRC in rats to investigate the use of targeted gold nanoparticles (AuNPs) as a diagnostic tool for CRC. Methods: Ten Wistar rats were injected with 1,2-dimethylhydrazine (DMH), 25 µg/Kg bodyweight once per week, for 5 consecutive weeks to induce CRC. This was followed by an incubation period of 22 weeks. At the end of the incubation period, AuNPs were synthesized using Turkevich’s citrate reduction method, and conjugated with peptide p.L. The rats were then injected intraperitoneally with p.L-PEG-AuNPs to detect CRC. Six rats were kept as controls and did not receive any treatment. Results: Five injections of DMH did not induce CRC in the rats. Conclusion: Even though CRC could not be induced using DMH in this study, 14 nm p.L-AuNPs were synthesized successfully.
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- Date Issued: 2020
Ecological assessment of a temperate river system using biomonitoring techniques: a case study of the Bloukrans River system, South Africa
- Authors: Magadze, Tinotenda
- Date: 2020
- Subjects: Bloukrans River , Ecological assessment (Biology) -- South Africa , Stream ecology -- South Africa , Rivers -- Environmental aspects -- South Africa , Benthic animals -- Effect of human beings on -- South Africa , Water quality biological assessment -- South Africa , Diatoms -- South Africa -- Data processing
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/142933 , vital:38177
- Description: Escalating pressures from growing human populations and environmental impacts increasingly imperil freshwater ecosystems. The Bloukrans River, which drains an urbanised and agricultural catchment in the Eastern Cape province of South Africa, is no exception. Detailed knowledge of the structure and function of the aquatic ecosystems is required in order to create models and matrices that predict, guide assessment and direct intervention on ecological integrity and water quality management in these systems. The main objectives of this research were to: examine the effects of urbanization on the benthic macroinvertebrate functional feeding guild structure among different stream orders; determine if benthic diatoms can be used as effective and reliable indicators of ionic composition and conductivity in different stream order categories and finally; to evaluate the applicability of the South African Diatom Index (SADI) and other indices in the Eastern Cape region of South Africa. Field studies were carried out to explore temporal patterns in community structure (macroinvertebrates and diatoms) and ecosystem function related to land-use patterns, instream habitat availability, and water quality parameters in the Bloukrans River system across four study periods: February (summer) and July (winter) 2016 and February (summer) and May/July (winter) 2018. The study was conducted along a gradient of impacts from less impacted agricultural headwaters to highly impacted urban sites located immediately downstream of the city of Makhanda. Macroinvertebrates were separated into functional feeding groups (FFGs) (i.e. collector-gatherer, collector-filterer, scraper, shredder, and predator) which were then used to assess the effects of selected physico-chemical variables and riparian zone condition on FFG organization. Collector-gatherers were the most abundant in the Bloukrans River and represented 71.3 % of the macroinvertebrate assemblages. Stream order 1species such as Nitzschia palea, Gomphonema parvulum, Tryblionella apiculata, Diploneis vulgaris and Staurosira elliptica. Multivariate analysis (Canonical correspondence analysis (CCA)) indicated that differences in diatom community assemblages were best explained by calcium, magnesium, pH, phosphate, nitrate, dissolved oxygen, sediment nitrate, conductivity and salinity. These results indicate that diatoms can be used as bioindicators for monitoring highly impacted river systems and to also further examine pollution gradients and impacts of specific/point pollution sources. In order to further test the application of diatom indices, nine sites with contrasting water quality were sampled along the length river system in February, May and July 2018. Diatom-based indices incorporated in OMNIDIA software were applied to assess the integrity of the water quality as indicated by diatom communities. For comparative purposes, several foreign indices (e.g. the trophic diatom index (TDI), the percentage pollution-tolerant valves (%PTV), biological diatom index (BDI)) and the South African Diatom Index (SADI) were used in the study. From the results, the Percentage Pollution-Tolerant Valves (%PTV) of most urban sites in the Bloukrans River was above the 20% limit indicating the presence of organic pollutants. Although the foreign diatom indices were applicable in the study, the SADI had significant correlations with most water quality variables (p < 0.05) compared to other indices such as Watanabe Index (WAT), Biological Index of Water Quality Trophic Index (BIWQ) and Trophic Index (TI)). These results support wider use of the SADI as an indicator of water quality conditions in South African river systems. Finally, the observed variations in diatom community structure and composition as a result of changes in water quality were broadly in agreement with the results of macroinvertebrate FFG structure indicating that the two biological indicators can, and should, be used as complementary techniques in the biomonitoring of rivers and streams in South Africa.
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- Date Issued: 2020
Ecological engineering: an assessment of the ecological impact of Reno mattress structures used in erosion control in the Keurbooms Estuary, South Africa
- Authors: De Villiers, Nina
- Date: 2020
- Subjects: Sediments (Geology) -- Management , Sediments (Geology) -- South Africa -- Keurboomstrand , Coast changes -- South Africa -- Keurboomstrand , Shore protection -- South Africa -- Keurboomstrand , Coastal engineering-- South Africa -- Keurboomstrand , Coastal zone management-- South Africa -- Keurboomstrand , Estuarine ecology-- South Africa -- Keurboomstrand , Eelgrass -- South Africa -- Keurboomstrand , Reno Mattresses
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/166138 , vital:41332
- Description: Global climate changes have been associated with ocean warming and sea-level rise. Armouring of coastlines has become common practice with the increasing threat of coastal erosion. The transformation of soft sediment habitats to hard, artificial habitats because of coastline armouring can lead to changes in species diversity, composition and distribution. It is, therefore, essential to assess changes to habitats from coastal development as well as the ecological impact erosion control structures have within coastal systems. Ecological engineering attempts to combine engineering principals and ecological processes to reduce environmental impacts from coastal development and the implementation of artificial structures. Estuaries are particularly vulnerable to anthropogenic impacts through development, and are extremely important systems offering nursery and foraging grounds for many species. These systems are, however, particularly vulnerable to anthropogenic impacts from urbanisation and development. Within South Africa many estuaries are being transformed by the addition of artificial structures to combat erosion, one such structure is the Reno mattress (a flattened wire box filled with rocks). This study compared the fish diversity and abundances of existing Reno mattress structures and natural eelgrass (Zostera capensis) habitat in the Keurbooms Estuary, South Africa. Benthic invertebrates were sampled using standard core sampling and an adapted suction sampling approach within the two habitats. The non-destructive method of mini Baited Remote Underwater Video Systems (BRUVs) was used to sample fish. Seasonal benthic invertebrate and fish abundances and assemblages were assessed from winter 2018 to spring 2019 with greater abundances of both recorded in summer. Significantly greater abundances, diversity, and richness of fish were found in the Reno mattress habitat compared to Z. capensis. Invertebrate taxa displayed some overlap between habitats, however, three higher taxonomic groups were only recorded within Reno mattress habitat and one only within the eelgrass habitat. Fish assemblages differed significantly between the two established habitats. A Before-After-Control-Impact (BACI) investigation was used to assess the ecological impact of newly installed Reno mattresses in the Keurbooms Estuary. Zostera capensis extent was sampled by determining the percentage cover of 0.5 m X 0.5 m quadrats and measurements of eelgrass blades. Percentage cover and blade length decreased during the installation of Reno mattress, but then recovered shortly after completion of the installation. Abundances, richness and diversity of invertebrates and fish were found to be similar before and after the installation which suggests that the installation had no net negative impact on the site. The Reno mattresses were found to attract fauna typical of rocky shore environments as well as a few invasive alien invertebrate species. This study noted that a hybrid habitat of Reno mattress and eelgrass was created and may in fact provide the positives of both to a system. In any coastal development it will be important to balance the demands of a growing population and the protection of natural habitats. The results of this study suggest that complex artificial structures such as Reno mattresses do provide habitat for fish and invertebrates. However, the use of these structures should be in combination with natural vegetation (e.g. as a hybrid habitat) and not one that replaces intertidal and subtidal natural habitat especially eelgrass. There is limited information regarding the ecological impacts of using Reno mattresses in estuaries and this study provides new information on their ecological efficacy that should be valuable for future coastal erosion control practices.
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- Date Issued: 2020
Ecological health assessment and ecosystem service provision of two urban wetlands in Port Elizabeth, Eastern Cape (South Africa)
- Authors: Larsen, Michael
- Date: 2020
- Subjects: Ecological assessment (Biology) -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , Msc
- Identifier: http://hdl.handle.net/10948/48434 , vital:40876
- Description: The exponential increase in population numbers has imposed greater demands on the natural environment to meet energy demands for food, transportation, water treatment and the production of consumable goods (Faulkner, 2004). The majority of the African continent is dominated by arid and semi-arid climates and as a result freshwater is limited with many regions experiencing severe water shortages on a regular basis (Schuyt, 2005). Increased natural resource consumption, technological advancements that increase the rate at which resources are harvested and global population growth have had numerous effects on the natural environment. Wide spread degradation of natural habitats is occurring globally resulting in changes to both fauna and flora and can lead to changes in species distribution and abundance, community composition and ecosystem function (Faulkner, 2004).
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- Date Issued: 2020
Economic convergence among the SADC members
- Authors: Mbangezeli, Sinawo
- Date: 2020
- Subjects: Convergence (Economics)
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/48927 , vital:41171
- Description: This study utilized beta convergence to investigate the catch-up process among the Southern African Development Community (SADC) for the period 1971 to 2017. The theoretical underpinning of this study was that of neoclassical economists, such as Solow (1956) and Barro and Sala-I-Martin (1990, 1991). Gross Domestic Product (GDP) growth rates and per capita growth rates were used to test for the convergence hypothesis. This study employed conventional unit root test which include the Augmented Dickey-Fuller (ADF) test, Phillips Perron (PP) test and the Kwiatkowski Phillips Schmidt Shin (KPSS) test. As well the Dickey Fuller-GLS and NG-Perron modified unit root tests. In addition, the Lee-Strazicich (LS) and Zivot- Andrew (ZA) unit root tests were used to allow for structural breaks. The conventional and modified unit root tests showed that most countries show evidence of GDP growth convergence, the exception being on the KPSS unit root test. Furthermore, most countries showed evidence of convergence when classified according to income levels. Meanwhile, when the structural breaks unit root tests when performed there was a strong evidence of both GDP growth and GDP per capita growth rates. Except in a few cases of the Lee-Strazicich tests. Lastly, the Flexible Fourier Form (FFF) unit root test was performed following the Enders and Lee (2012) methodology. The t-statistics under the FFF test reveal that all members besides Congo and Zimbabwe converge towards the SADC average growth rates. Similarly, all lower-middle economies catch up to the upper-middle- and high-income level economies and upper-middle economies converge to Seychelles’ GDP growth rates. Whereas only Congo and Tanzania among the lower income economies converge toward the average GDP growth rates of the other countries. In addition, all members show evidence of per capita GDP convergence except when the test is performed in panel A. Based on the reported results, the paper recommends that measures should be put in place to aid non-converging member states, adoption of growth promoting policies and that there should be harsh consequences for countries that do not improve their growth rates.
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- Date Issued: 2020
Economic evaluation of chemical and biological control methods on four aquatic weeds in South Africa
- Authors: Maluleke, Mary
- Date: 2020
- Subjects: Invasive plants -- Biological control -- Economic aspects -- South Africa , Introduced organisms -- Biological control -- Economic aspects -- South Africa , Aquatic weeds -- Biological control -- Economic aspects -- South Africa , Aquatic weeds -- Control -- Economic aspects -- South Africa , Aquatic resources -- Management , Cost effectiveness , Net present value , Herbicides -- Cost effectiveness , Working for Water Programme , Water conservation -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/145953 , vital:38481
- Description: Invasive alien plants (IAPs) of various kinds pose a threat to ecosystems, biodiversity, conservation and overall economy. In a world experiencing exponential increase in IAPs – this issue has become endemic, especially for developing countries such as South Africa. South Africa is a water scarce country and IAPs increase water stress. Thus, South Africa must invest in a more realistic, environmentally and economically inclusive policy outlook on the management of IAPs including aquatic weeds. This is especially urgent when considering the changing global climate, which is predicted to further reduce the quantity and quality of potable water. The Working for Water Programme (WfW) in South Africa aimed at addressing the issue of IAPs in a way that protects the environment as well as produces maximum return to society through poverty alleviation. As such, the aquatic weeds management strategy put in place for four of South Africa’s aquatic weeds Pista stratiotes, Salvinia molesta, Azolla filiculoides and Myriophyllum aquaticum - should be one that is cost-effective, efficient and sustainable; yielding the best possible return on investment. Since these four weeds are already under complete biological control, in the absence of biological agents, the WfW programme would have used herbicides to control these weeds. As such, this thesis conducted a retrospective analysis of the relative herbicide cost-saving associated with the use of biological control. To do this, due to existing limitations, E. crassipes was used as a surrogate weed and its herbicide control costs were used as proxy for the herbicide control cost estimates of the four selected weeds; with reasonable conversion factors applied to cater for the biological difference of the five weeds. Using the cost benefit analysis (CBA) framework, the net present cost (NPC) of each control method was calculated to which the relative cost-saving was considered to represent the avoided cost of using biological control instead of chemical control on these weeds. The avoided cost was used as the main benefit component when deriving the relative benefit cost ratios (BCR). Two scenarios were used, one assuming no follow-up requirement and the other assuming one follow-up requirement for chemical control. Using an 8% discount rate, the study found that the estimated cost of the biological control method on all four aquatic weeds was about R7,843,205 while for chemical control the estimated costs would have costed R149,580,142, R268,264,838 and R881,711,738 for application by means of a boat, bakkie and knapsack. Chemical control cost estimates would have increased to about R164,538,052, R295,216,120 and R1,008,761,000 for boat, bakkie and knapsack approach respectively when including a possible follow-up programme. These would have led to positive BCRs of 90.24:1, 164.97:1 and 557.99:1 across the three chemical control approaches without a follow-up (with BCR of about 99.67:1, 182.00:1 and 631.56:1 for the boat, bakkie and knapsack approach respectively with the accepted follow-up programme). When running a sensitivity test with varying discount rates of 5% and 10%, these results remained robust. As such, failing to reject the dominant hypothesis in literature, the main conclusion of the study is that biological control is indeed the more cost-effective management option compared to chemical control with respect to herbicide cost-saving. Further, biological control is most-likely to produce more environmental cost-saving and water-saving over chemical control. The study recommends the continued use of the biological control investment on the four aquatic weeds under study as well as on emerging aquatic weeds such as Iris pseudacorus, Nymphaea mexicana and Sagittaria platyphylla in South Africa.
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- Date Issued: 2020
Economic growth and carbon emissions in BICS countries
- Authors: Mapapu, Babalwa
- Date: 2020
- Subjects: Economic development Atmospheric carbon dioxide -- Economic aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/48861 , vital:41165
- Description: Of recent carbon emissions have become an increasing concern for economies worldwide. The study investigates the relationship between carbon emissions and economic growth for the BICS (Brazil, India, China and South Africa), one of the largest emitters of carbon dioxide worldwide. ARDL methodology is employed which is applied to annual data covering a period of 1970 to 2017. The empirical results indicate there is a long run negative relationship between carbon emissions and economic growth. Overall results thus encourage policymakers to continue to embark on energy efficiency programmes which specifically target lower levels of carbon pollution.
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- Date Issued: 2020
Educators’ views on the effectiveness of alternatives to corporal punishment to maintain discipline: a case of four high schools in the O.R. Tambo District
- Authors: Kassim, Abdul Fatau , Pylman, N J
- Date: 2020
- Subjects: School discipline -- South Africa -- Eastern Cape Corporal punishment of children -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10353/11329 , vital:39060
- Description: The purpose of this study is to explore educators’ views on the effectiveness of alternatives to corporal punishment to maintain discipline in selected high schools in the O.R. Tambo District. Corporal punishment has been outlawed in all South African schools through the South African Schools Act and was replaced by alternatives to corporal punishment. The objectives of this research were to determine educators’ understanding of alternatives to corporal punishment; the interface between alternatives to corporal punishment and learner behaviour; alternatives to corporal punishment in relation to effective teaching and learning and the barriers that educators experience with the implementation of alternatives to corporal punishment. This research study is fundamentally placed within two schools of thought, namely, Thorndike’s traditional behaviour modification theory and Roger’s diffusion of innovations theory. This study is a multiple-case study located within the interpretivist paradigm, and qualitative in nature. Purposive sampling was used to sample four secondary schools in the O.R. Tambo districts. Twelve (12) participants comprising four principals, four teachers and four SMT members were purposively selected from the four schools. In depth semi-structured interviews and document reviews were used as data generating instruments. Thematic analysis was used to analyse taperecorded data obtained from the semi-structured interviews and document reviews. Findings revealed that there seems to be a common understanding amongst participants around the issue of alternatives to corporal punishment. The findings indicated that participants are aware of the different strategies that can be used to discipline learners without causing physical pain or a violation of their rights. The second finding noted that alternatives to corporal punishment did not serve the purpose which it was intended to. This view points to the fact that learners do not take alternatives to corporal punishment seriously and as such do not lead to improved discipline and behaviour amongst learners. The third finding also revealed that the implementation of alternatives to corporal punishment does not contribute to effective teaching and learning as well as the academic performance in the classroom, because learners frequently absent themselves and are also bunking classes which leads to poor academic performance. It was also claimed that teaching and learning is not all that effective as learners do not respect educators anymore and as such also fail to v complete homework and assignments on a regular basis. The final finding alluded to the fact that insufficient orientation and lack of training on alternative methods of discipline by the Department of Education made it extremely difficult for teachers to implement and administer alternatives to corporal punishment in schools. Given the aforementioned findings, it can be concluded that alternatives to corporal are mainly viewed as ineffective. Furthermore, findings from this study also revealed that educators have not adopted alternatives to corporal punishment, which is in line with Rogers’ theory who aptly states that any new idea or innovation can either be adopted or rejected by social groups. In addition is also seems as if educators have as yet not undergone a change in behaviour in line with Thorndike’s traditional behaviour modification theory, which further hinders the successful implementation of alternatives to corporal punishment.
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- Date Issued: 2020
Effect of increasing fossil shell flour levels on digestive and metabolic utilization, health, body weight change and wool production, and quality in Dohne-Merino wethers
- Authors: Ikusika, Olusegun Oyebade
- Date: 2020
- Subjects: Merino sheep Sheep -- Quality
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/18465 , vital:42542
- Description: The study's broad objective was to assess growth performance, blood and parasitic profiles, wool parameters, methane emission, and nutritional status of Dohne-Merino wethers fed diets supplemented with varying levels of fossil shell flour. Twenty-four Dohne-Merino wethers, averagely weighing 20.0±1.50 kg, were divided into four groups and used in this study. The effects of varying inclusion levels of fossil shell flour (FSF) (0, 2, 4, and 6 %) on feed intake, water intake, nutrient digestibility, N-retention, hematobiochemical and parasitic profiles, body condition scores, feed preference, wool parameters and methane output were determined. The influence of FSF's varying inclusion levels on fermentation parameters, in vitro true digestibility, and relative feed values were also determined. Wethers fed with 4% FSF inclusion level diet showed the highest (P<0.05) values for dry matter intake, average daily weight gain, N retention, (Nitrogen retention) and apparent digestibility of crude protein (CP), Ether Extract (EE) and Ash 6 % (P < 0.05). The urinary N and fecal N were lowest in wethers fed 4% FSF inclusion level and highest in those fed on diets without FSF (P < 0.05). Water intake was highest in wethers fed 0% FSF diet, followed by those fed on 4% and lowest in 6% FSF (P< 0.05). There was a significant increase in white blood cell counts in wethers fed on a diet with 4% and 6% FSF inclusion levels from day 10 to 100 compared to wethers fed on a diet with 0% and 2% FSF (P <0.05). Red blood cell counts also increased significantly in wethers fed on a diet containing 4% FSF, but a slight increase in wethers with 6 % FSF diet, throughout the experimental period (P < 0.05). Blood urea was highest in wethers fed 0% FSF inclusion level and lowest in 6% at day 30 to day 100. Wethers on 4% FSF diet showed an increase in blood urea from day 30 to day 100 (P < 0.05) while wethers on 0% and 2% remained unchanged (P<0.05) during this period and not different (P > 0.05) from wethers on 4% FSF as well. The total protein concentration, albumin, total bilirubin, Na, K, glucose, cholesterol, and liver enzymes were normal for wethers. However, serum creatinine level was lower in wethers fed on 4% FSF than those on 0% FSF (P < 0.01). Haemonchus and Coccidian fecal egg counts were low in wethers fed diets with 2%, 4%, and 6 % FSF (P < 0.01) compared 11 with wethers fed with 0% FSF inclusion level during the same period. The body condition score of wethers fed on diets with 2%, 4%, and 6% FSF inclusion levels were higher than those on 0% (P < 0.05). Wool yield, staple length, the coefficient variation of the fibre diameter, and fibre of wethers fed on diets with FSF were higher than those without FSF (P < 0.05). The fibre diameter of the wethers fed on FSF supplemented diets was the same as those on 0 % FSF (P > 0.05). The wethers spent more time on FSF supplemented diets and consumed more feed compared to that without FSF supplemented (P < 0.05). The levels of FSF inclusion in the diet affected the enteric methane output (ppm-m), where 4 % FSF had the highest enteric methane output while wethers on 2 % FSF had the lowest methane output (P < 0.05). Resting wethers produced more methane (g/day) than those feeding or standing (P < 0.05). Increasing levels of FSF did not affect ruminal temperature and pH. Ammonia-N increased with increasing FSF except in wethers fed on a diet with 4% FSF (P < 0.01). The total molar concentrations of the wethers' volatile fatty acids decreased with increasing FSF levels (P > 0.05). The acetic propionic ratio of the wethers also decreased except at a 4% inclusion level. The in vitro true digestibility dry matter (IVTDDM), in vitro true digestibility neutral detergent fibre (IVTDNDF), and in vitro true digestibility acid detergent fibre (IVTDADF) of the wethers decreased up to 4% FSF inclusion but tended to increase at 6% inclusion. This study's result as one of the pioneer studies in Dohne-Marino wethers showed that FSF treatment has the potential to improve the nutritional status of the animal and the animal performance and wool quality. Health-wise, FSF decrease nematode population and boost animal immunity as seen in RBC and WBC counts. It also can play a major role in protecting the environment, as seen in its reduction in feacal and urinary nitrogen, which is heavily involved in environmental pollution. Result also confirmed that the best period to target for methane mitigation in ruminants is the resting period. In conclusion, the inclusion of FSF in the diet of Dohne-Merino wethers has the potential to improve the overall performance, with a 4% FSF inclusion level having optimal productivity. However, future research is required to investigate FSF's effect on meat quality, rumen microbial community, in-vivo digestibility, and milk production.
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- Date Issued: 2020
Effect of the nature of nanoparticles on the photophysicochemical properties and photodynamic antimicrobial chemotherapy of phthalocyanines
- Authors: Magadla, Aviwe
- Date: 2020
- Subjects: Nanoparticles , Phthalocyanines , Anti-infective agents -- Therapeutic use , Photochemotherapy , Photochemistry
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/123107 , vital:35406
- Description: In this work, the syntheses and characterisation of Zn monocaffeic acid tri–tert–butyl phthalocyanine (1), Zn monocarboxyphenoxy tri– tert–butylphenoxyl phthalocyanine (2), tetrakis phenoxy N,N-dimethyl-4-(methylimino) phthalocyanine indium (III) chloride (3) and tetrakis N,N-dimethyl-4-(methylimino) phthalocyanine indium (III) chloride (5) are presented. Complexes 3 and 5 were further quartenised with 1,3- propanesultone to form corresponding complexes (4) and (6), respectively. Complexes 1 and 2 were covalently linked to amino functionalised nanoparticles (NPs). Complexes 3, 4, 5 and 6 where linked to oleic acid/oleylamine capped (OLA/OLM) silver-iron dimers (Ag-Fe3O4 OLA/OLM) and silver-iron core shell (Ag@Fe3O4 OLA/OLM) NPs via interaction between the nanoparticles and the imino group on the phthalocyanines. The phthalocyanine-NP conjugates afforded an increase in triplet quantum yields with a corresponding decrease in fluorescence quantum yield as compared to the phthalocyanine complexes alone. Complexes 3, 4 and their conjugates were then used for photodynamic antimicrobial chemotherapy on E. coli. The zwitterionic photosensitiser 4 and its conjugates showed better efficiency for photodynamic antimicrobial chemotherapy compared to their neutral counterparts.
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- Date Issued: 2020
Effectiveness of different interventions to reduce occupational sitting among office administrators at Rhodes University
- Authors: Malesa, Thato
- Date: 2020
- Subjects: Standing position , Sedentary behavior , Work environment , Employee health promotion , Office furniture -- Design , Industrial hygiene , Employees -- Health risk assessment , Human engineering , Compliance
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/166403 , vital:41360
- Description: Background: Sitting for prolonged periods is common in the working environment. Office workers are exposed to long periods of sitting time at work. Research has reported associations between prolonged sitting and negative health implications. As such studies have proposed different interventions aimed at reducing sitting times in the workplace. The aim of the current study was to evaluate the effectiveness of two different interventions, physical intervention (sit-stand worktables) and personal intervention (instruction to stretch) on compliance and reducing occupational sitting behaviour. The study also aimed to investigate the effectiveness of interventions in improving or impairing mood. Methods: The study took the form of a fieldbased study atRhodes University, Makhanda, South Africa. Fifteen full–time office workers in different divisions participated in the study. Participants were randomly allocated to either the physical or personal intervention group. In both intervention groups, partic ipants were prompted to stand for five minutes every hour during the workday to either work in a standing position or perform stretches. Over the course of the experiment, desk occupancy, sitting/standing time and mood effect were recorded in both intervention groups Both intervention groups were monitored for a period of three months (58 days). Results: The study found that the physical intervention group was an effective approach to reduce prolonged sitting in the workplace in comparison to the personal intervention group. Over the course of the experiment, there was sustain usage of interventions in both groups, however, in the physical intervention group desk usage decreased overtime. The findings of the study also show that some participants were more compliant with the study procedures than others. It was also found that mood improved upon introducing interventions in the workplace. However, with the outcomes of the results, the study acknowledges that several factors emerged which are likely to impact compliance, which future studies may investigate. Conclusion: Although sit-stand worktables are expensive, it seems like introducing them was successful in reducing sitting time and changing sitting behaviour in comparison to an intervention that instruct s individuals to stand up and stretch.
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- Date Issued: 2020
Effects of economic growth on greenhouse emissions
- Authors: Mkunyana, Asebenzile Priscilla
- Date: 2020
- Subjects: Greenhouse gases -- Environmental aspects -- Africa , Climate change mitigation
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/50404 , vital:42162
- Description: This study employs the panel cointegration and Pooled Mean Group technique to examine the effects of economic growth on greenhouse emissions using the panel data from the period of 1970 to 2014 for five Southern African Development Community group of countries. The increase in the combustion of burning fossil fuels has become the global threat in environmental quality. The Environmental Kuznets Curve hypothesis postulates that at the primary stages of industrial economies there is more extracting of natural resources and more agricultural activities taking place as a result the waste generation and resource depletion accelerate. However, as the economic development improves more, the curve reaches a threshold where it starts to decline due to the increase in economic growth and the change to information-based industries. Based on the empirical evidence, the variables of this study were found to be stationary at first difference and integrated of I(0) and I(1) using Im, Pesaran & Shin W-stat, Fisher ADF, and Levin, Lin & Chu panel unit root test. The existing long-run relationship between the variables were found in both the Pedroni and Kao cointegration test and were significant at 5% in finding the relationship between the variables. The Pooled Mean Group demonstrated mixed results in the study’s regressions, monotonic relationship was found between carbon dioxide and economic growth. The strong existence relationship between economic growth and energy consumption was found to be significant at the 1% level. These results are in line with the EKC hypothesis, which assumes that as the income level increases the society will start to be environmentally friendly and the technology advancement will decrease the emission of pollutants. In addition, in finding the causal relationship between variables, the researcher used the Granger causality test, with the results from this test revealing a unidirectional and bidirectional relationship between all the chosen variables. These results are important for policy makers.
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- Date Issued: 2020
Effects of high-intensity speed training on the speed reserve of university middle-distance and field sport athletes
- Authors: Thomas, Emma Jayne
- Date: 2020
- Subjects: Athletes
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/46346 , vital:39599
- Description: Context: Despite the multiple differences between athletic events and sports, they all share the sporadic bouts of moderate to extreme intensities and all require some contribution from an integrated bioenergetic system to allow for optimal performance. Although D’ is often considered as an ‘anaerobic work capacity’, such a definition is over-simplistic and its precise composition is nebulous, especially given the mixed findings of the experimental evidence. Clearly, further research is needed to provide a more complete understanding of the D’ parameter, as well as the speed reserve(range of speeds exceeding critical speed) especially within high-intensity exercise. Purpose (Aim): The aim of this study is to determine whether a short term high-intensity speed training intervention within the severe intensity domain effects speed reserve in athletic and non-athletic individuals considered moderately trained.Methods: A quantitative research design was used. Participantscompletedbaseline testing (pre-test), after which they were assigned into two groups. Both groups received a HIIT training program, with group 1 (G140%) receiving a program based on intensity prescription (work bouts performed at 140% of CS)and group 2 (G90-s) receiving a program based on time intervals (work bouts performed for 90-s). HIIT sessions were performed twice-weekly for a total of 6-weeks. A post-test assessment was then conducted by both groups to determine whether any changes have accrued in any of the physiological variables in question. Participants of the study met a specific criterion(18 –30 years of age, residing in Nelson Mandela Bay, and met the minimum fitness requirements). Results: No significant between-group differences were evident prior to and following cessation of the HIIT intervention. Findings that can be highlighted holistically include improvements in CS(G140%: M = 0.62 m.s-1; G90-s: M = 0.46 m.s-1)and 𝑉̇𝑂2𝑚𝑎𝑥 (G140%: +3.81 ml.kg-1.min-1; G90-s: +5.19 ml.kg-1.min-1)and a decrease in fatigue index (G140%: M = -6.75%; G90-s: M = -4.38%) and D’(G140%: M = -56.34 m; G90-s: M = -18.36 m).Normative data were generated for athletic and non-athletic participants using the standard nine (Stanine) categorization to facilitate interpretation and recommendations of key parameters for coaches and clinicians. Moreover, a deterministic model was also generated which revealed novel interactions and the strength of the relationship between variables-potentially opening new and innovative areas of future research. Conclusions: The interval durations and speeds utilised in the present study were insufficient to stimulate an increase in D’. To elicit an increase of D’, one would have to decrease the duration of the intervals performed(i.e. < 90-sec), while increasing speed at which the intervals performed at some speed greater than 140% of CS, but below MSS. Further research is needed to understand the physiological underpinning of the D’ parameter both in isolation and in conjunction with CS. It is clear that D’ is influenced by parameters such as MSS, 𝜏d and FI%; therefore, these sub-parameters should be explored further as potentiators for moderating the D’ parameter.
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- Date Issued: 2020
Efficacy of the rind physiological disorder oleocellosis control measures in lemon fruit (Citrus limon) under shade netting
- Authors: Njili, Zamazima
- Date: 2020
- Subjects: Citrus fruits--Storage--Diseases and injuries , Citrus--Diseases and pests Citrus fruit industry Citrus products
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/49237 , vital:41613
- Description: Lemon growers aim to produce fruit with no blemishes on the rind. Fruit without blemishes is regarded as high value fruit required for the export market. Leakage of phytotoxic oil from the rind tissues damages them and results in the development of oleocellosis symptoms. Four experiments were conducted to investigate methods of avoiding and controlling the development of oleocellosis during harvest and post-harvest handling. The first experiment indicated that the rind oil release pressure (RORP) test is the method most effective at predicting oleocellosis incidents. The experiment also suggested that fruit not exposed to the sun are the most susceptible to oleocellosis due to low temperatures that cause high turgidity. Oleocellosis results when turgid fruit is mishandled. A cultivar experiment was carried out to ascertain the lemon cultivar most susceptible to oleocellosis. The results show that the Limoneira cultivar is the most susceptible to oleocellosis and 2PH seedless is the least susceptible cultivar when compared to other lemon cultivars such as Lisbon, Eureka and Genoa. When the use of shade netting was tested to determine its effect on oleocellosis severity, it was found that using shade netting did not have an effect. Fruit grown under shade netting had the same colour and average diameter as fruit grown in an open orchard. In the same experiment, mature fruit were shown to be more susceptible to oleocellosis than immature fruit. The final part of the project investigated harvesting and post-harvest practices to determine those that cause oleocellosis the most. It was found that fruit after degreening had greater oleocellosis due to exposure to moisture conditions and rough handling. Another practice that results in oleocellosis occurs before waxing when the fruit was roughly transferred from the bins into the packline. The third oleocellosis inducing practice was moving fruit along the conveyor belt while it is turgid. Improvement of handling procedures to reduce oleocellosis can increase export volume and result in higher value of fruit per carton.
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- Date Issued: 2020
Efficient market hypothesis : testing weak-form efficiency on the Johannesburg stock exchange
- Authors: Eaton, Bradley Hayes
- Date: 2020
- Subjects: Efficient market theory
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/47895 , vital:40396
- Description: Understanding financial markets is paramount in acknowledging the flow of domestic and foreign funds over time. In this study, net market capitalisation price and simple return characteristics were investigated for the period from January 2009 to December 2017. An empirical, statistical approach was used to explore the possibility that, since the 2008 financial crisis, forward-looking, aggregate market and financial-oriented equity indices have conformed to the Efficient Market Hypothesis. Accordingly, monthly observations were made to ensure long-run traits were identified and scrutinised. Such revelations are important for portfolio diversification, risk, and expected return potentials with respect to South African equity markets. Based on the study, it was found that random walks were evident in both the price and return time-series as a result of significant stochastic price action, supported by evidence suggesting non-normality of price and return distributions. Unit root and stationarity modelling confirmed such traits. However, significant trending behaviours were evident in the auto-correlation figures with regards to prices, despite mean-reverting and stochastic influences. Therefore, it was concluded from the results of the study that the respective time-series were weak-form efficient. The empirical component was supplemented by a comprehensive investigation into the market determinants of financial market inefficiencies, including partial correlations, contagion effects, momentum, financial bubbles, and liquidity issues. Secondary objectives of the study included identifying the roles of security exchanges and the effect of international linkages, as a result of globalisation, on the financial markets. Increased macro-economic and systems integration has led to positive and negative connotations for business cycles. Spill-over effects into global equity markets are evident as can be seen through the co-integration of leading world exchanges, both in the developed and emerging market spheres. Fundamental to this study was the sensitivity of South African equity markets to recessionary pressures, as analysed through the efficiency of aggregated equity indices.
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- Date Issued: 2020