Biological activities of tulbaghia violacea against cryptococcus species
- Authors: Mitradev, Pattoo
- Date: 2018
- Subjects: Violaceae -- Therapeutic use -- South Africa , Anticoagulants (Medicine) , Medicinal plants -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/32772 , vital:32357
- Description: Cryptococcus neoformans and Cryptococcus gattii, which are environmental yeasts, are the etiological agents of cryptococcosis in both immunocompromised and immunocompetent individuals, and account for high mortality and morbidity rates in sub-Saharan Africa. The current antifungal agents used for treatment of cryptococcal infections either target the fungal cell wall (β-(1,3) glucan and chitin) or cell membrane directly or ergosterol biosynthetic pathways or fungal DNA and RNA. Gaps in antifungal therapy include the unavailability and exhorbitant costs of these drugs especially to patients in the developing world. Drug resistance to conventional drugs is also an ever-increasing problem. It is therefore essential to find alternative natural compounds from medicinal plants that are safer, cheaper and more widely available. Tulbaghia violacea, also known as wild garlic, has been used as a traditional remedy in South Africa for the treatment of several ailments. Aqueous and organic extracts of the plant have been demonstrated to have antimicrobial and antifungal activity against several pathogens. However, there is a huge gap in our current knowledge in that the mechanism/s of action/s of these extracts have not been fully investigated. The focus of the current study therefore was to determine whether T. violacea extracts from the roots, rhizome, leaves and tubers exhibited antifungal activity against C. neoformans and C. gattii and to evaluate the ability of the rhizome extract to induce changes in key fungal virulence factors. Three mechanisms (ergosterol, β-(1,3) glucan and chitin production) regulating the antifungal activity of the rhizome extract were also examined. In the current study, phytochemical analysis of aqueous extracts of the roots, leaves, rhizomes and tubers showed that the rhizomes had the highest phenolic, saponin and tannin content when compared to the other plant organs. Fingerprinting by GC-MS revealed identical compounds in the different plant parts with the detection of 4 H Pyran-4-one DDMP (known antifungal), previously unreported in studies on T. violacea. The bulk of the extract comprised of 40% sulphur-containing and 20% furan-containing compounds. The remaining minor compounds comprised of 2x alcohols (13.3%), 1x pyran (6.7%), 1x ketone (6.7%), 1x halogen (6.7%) and 1x acid (6.7%) compounds. The rhizomes also had highest content of 2 methyl methioacetic acid, benzophenone and chloromethyl methylsulfide compared to the other plant parts. The rhizomes were found to be more potent against both pathogenic fungi tested here with an MIC and MFC of 1.25 mg/ml. Nystatin was included as a positive control when determining the MIC’s and MFC’s of the different plant extracts. The antifungal nature of the T. violacea extracts in the current study may be due to the synergistic effects of the sulphide, furan, pyran and ketone compounds present in the extracts, but this still remains to be verified in future studies. An investigation of the effects of an aqueous rhizome extract of T. violacea on Cryptococcus virulence factors showed that phospholipase activity of C. neoformans and C. gattii remained unaffected with increasing sub-lethal doses of the plant extract. There was significant reduction in urease production in both fungi in a dose dependent manner relative to the untreated cultures after 24 hr exposure to the extract. However, urease production reverted to normal after 48 hr post exposure implying that the cultures were able to recover due to temporary inhibition of urease activity. A significant decrease in melanin production was observed in both C. neoformans and C. gattii with increasing sub-inhibitory concentrations of the rhizome extract. Investigation of the effect of the plant extract on the ultrastucture of the fungi via Transmission Electron Microscopy showed the induction of cytomorphological changes in C. neoformans and C. gattii. Changes included thickening of the cell wall, an increase in the number of vacuoles, mitochondrial swelling and occasional detachment of the membrane from the cell wall. These changes suggest the activation of possible defence mechanisms to compensate for the loss of cellular materials or an effort to sequester toxic T. violacea components or toxic intermediates generated from inhibited cellular pathways. The capsule size and architecture remained unaltered in the presence of sub-lethal doses of the rhizome extract. To study the mechanism of action of the rhizome extract on ergosterol biosynthesis, total sterols were extracted and ergosterol, squalene, 2,3-oxidosqualene and lanosterol were quantified using Reverse Phase High Performance Liquid Chromatography. Ergosterol concentration declined in a dose dependent manner for both pathogenic yeasts similar to the positive control terbinafine, while there was a slight accumulation of squalene in C. gattii only. 2,3-oxidosqualene levels accumulated in both fungi relative to the untreated control. Lanosterol production showed an oscillatory trend for the two microorganisms. Together, these findings indicate that the rhizome extract is capable of inhibiting squalene epoxidase and 2,3-oxidosqualene/ lanosterol cyclase causing a decrease in ergosterol production.
- Full Text:
- Date Issued: 2018
- Authors: Mitradev, Pattoo
- Date: 2018
- Subjects: Violaceae -- Therapeutic use -- South Africa , Anticoagulants (Medicine) , Medicinal plants -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/32772 , vital:32357
- Description: Cryptococcus neoformans and Cryptococcus gattii, which are environmental yeasts, are the etiological agents of cryptococcosis in both immunocompromised and immunocompetent individuals, and account for high mortality and morbidity rates in sub-Saharan Africa. The current antifungal agents used for treatment of cryptococcal infections either target the fungal cell wall (β-(1,3) glucan and chitin) or cell membrane directly or ergosterol biosynthetic pathways or fungal DNA and RNA. Gaps in antifungal therapy include the unavailability and exhorbitant costs of these drugs especially to patients in the developing world. Drug resistance to conventional drugs is also an ever-increasing problem. It is therefore essential to find alternative natural compounds from medicinal plants that are safer, cheaper and more widely available. Tulbaghia violacea, also known as wild garlic, has been used as a traditional remedy in South Africa for the treatment of several ailments. Aqueous and organic extracts of the plant have been demonstrated to have antimicrobial and antifungal activity against several pathogens. However, there is a huge gap in our current knowledge in that the mechanism/s of action/s of these extracts have not been fully investigated. The focus of the current study therefore was to determine whether T. violacea extracts from the roots, rhizome, leaves and tubers exhibited antifungal activity against C. neoformans and C. gattii and to evaluate the ability of the rhizome extract to induce changes in key fungal virulence factors. Three mechanisms (ergosterol, β-(1,3) glucan and chitin production) regulating the antifungal activity of the rhizome extract were also examined. In the current study, phytochemical analysis of aqueous extracts of the roots, leaves, rhizomes and tubers showed that the rhizomes had the highest phenolic, saponin and tannin content when compared to the other plant organs. Fingerprinting by GC-MS revealed identical compounds in the different plant parts with the detection of 4 H Pyran-4-one DDMP (known antifungal), previously unreported in studies on T. violacea. The bulk of the extract comprised of 40% sulphur-containing and 20% furan-containing compounds. The remaining minor compounds comprised of 2x alcohols (13.3%), 1x pyran (6.7%), 1x ketone (6.7%), 1x halogen (6.7%) and 1x acid (6.7%) compounds. The rhizomes also had highest content of 2 methyl methioacetic acid, benzophenone and chloromethyl methylsulfide compared to the other plant parts. The rhizomes were found to be more potent against both pathogenic fungi tested here with an MIC and MFC of 1.25 mg/ml. Nystatin was included as a positive control when determining the MIC’s and MFC’s of the different plant extracts. The antifungal nature of the T. violacea extracts in the current study may be due to the synergistic effects of the sulphide, furan, pyran and ketone compounds present in the extracts, but this still remains to be verified in future studies. An investigation of the effects of an aqueous rhizome extract of T. violacea on Cryptococcus virulence factors showed that phospholipase activity of C. neoformans and C. gattii remained unaffected with increasing sub-lethal doses of the plant extract. There was significant reduction in urease production in both fungi in a dose dependent manner relative to the untreated cultures after 24 hr exposure to the extract. However, urease production reverted to normal after 48 hr post exposure implying that the cultures were able to recover due to temporary inhibition of urease activity. A significant decrease in melanin production was observed in both C. neoformans and C. gattii with increasing sub-inhibitory concentrations of the rhizome extract. Investigation of the effect of the plant extract on the ultrastucture of the fungi via Transmission Electron Microscopy showed the induction of cytomorphological changes in C. neoformans and C. gattii. Changes included thickening of the cell wall, an increase in the number of vacuoles, mitochondrial swelling and occasional detachment of the membrane from the cell wall. These changes suggest the activation of possible defence mechanisms to compensate for the loss of cellular materials or an effort to sequester toxic T. violacea components or toxic intermediates generated from inhibited cellular pathways. The capsule size and architecture remained unaltered in the presence of sub-lethal doses of the rhizome extract. To study the mechanism of action of the rhizome extract on ergosterol biosynthesis, total sterols were extracted and ergosterol, squalene, 2,3-oxidosqualene and lanosterol were quantified using Reverse Phase High Performance Liquid Chromatography. Ergosterol concentration declined in a dose dependent manner for both pathogenic yeasts similar to the positive control terbinafine, while there was a slight accumulation of squalene in C. gattii only. 2,3-oxidosqualene levels accumulated in both fungi relative to the untreated control. Lanosterol production showed an oscillatory trend for the two microorganisms. Together, these findings indicate that the rhizome extract is capable of inhibiting squalene epoxidase and 2,3-oxidosqualene/ lanosterol cyclase causing a decrease in ergosterol production.
- Full Text:
- Date Issued: 2018
Method validation for the quantification of casticin in vitex agnus castus fruit using an ftir multivariate chemometric model
- Authors: Du Toit Louw, Philippus
- Date: 2018
- Subjects: Drugs -- Analysis -- Methodology -- Evaluation , Alternative medicine -- Research , Liquid chromatography
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: http://hdl.handle.net/10948/30917 , vital:31222
- Description: The Complementary and Alternative Medicines (CAMS) and dietary supplement industry is an R8.84 billion a year industry in South Africa, with the sector expected to grow 12% annually. The industry has largely been unregulated up until 15 November 2013, when the South African government amended the Medicines and Related Substance Control Act (Act 101 of 1965) to include the definition of “Complementary Medicines” and “Health Supplements”. The emphasis of the new regulations is largely on the quality and safety of CAMS products. Manufacturers therefore need to demonstrate that the active ingredients used in manufacturing will be of an appropriate and consistent quality. The research question therefore is: Can a chemometric multivariate model be used to develop a rapid, cost effective method to quantify casticin, the major chemical constituent of Vitex agnus-castus (VAC) that can be used during routine quality control procedures? The primary aim of this study was to prepare a validated method using fourier transform infrared spectroscopy (FTIR) to quantify the casticin content in VAC fruit. The results from the HPLC analysis were as follows; the penduletin eluted at a retention time of 12.419 ± 0.376 minutes. The casticin eluted at a retention time of 12.943 ± 0.018 minutes. The casticin content for the samples ranged from 0.0115 – 0.0147% m/m casticin content with an average of 0.0134%. This is well below the pharmacopoeia requirement of not less than (NLT) 0.08% casticin content as described in the British Pharmacopoeia (BP). The results obtained from the HPLC analysis were used to construct the FTIR calibration model. The calibration model consisted of 18 spectra with 530 selected data points. The model was specific for casticin as spectral regions in the calibration model can be correlated to a known IR spectral response associated with the carbonyl group of casticin. The calibration equation in the xii form of % m/m casticin content had a coefficient of determination (R2) value of 0.9855 and a root mean square error of cross-validation (RMSECV) of 0.000119. The accuracy of the model had recoveries of between 98 - 102% for the actual vs true prediction. The percentage relative standard deviation (%RSD) between nine repeated measurements was 3.46%, this does not meet the International Conference of Harmonisation (ICH) requirement for precision of not more than (NMT) 2% RSD. The range of the calibration model was between 0.01147 and 0.01469 % m/m casticin content as established by the calibration model. The robustness of the method was assessed by challenging the model with samples that fall outside of the concentration of range of the model. This was established by quantifying previously scanned samples of VAC that is not part of the calibration set. The model was able to verify if the tested samples prediction was outside of the validated calibration range. The method was subsequently also challenged with a sample of a different identity to VAC. The model indicated that the sample tested does not fall in the range of the method and was clearly recognised as an outlier. The method was rapid and does not require any expensive solvents or timeconsuming sample preparation. However, the method does not meet the ICH requirements for method validation, the method does show potential and further method development and expansion of the calibration model can ensure that the method be validated.
- Full Text:
- Date Issued: 2018
- Authors: Du Toit Louw, Philippus
- Date: 2018
- Subjects: Drugs -- Analysis -- Methodology -- Evaluation , Alternative medicine -- Research , Liquid chromatography
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: http://hdl.handle.net/10948/30917 , vital:31222
- Description: The Complementary and Alternative Medicines (CAMS) and dietary supplement industry is an R8.84 billion a year industry in South Africa, with the sector expected to grow 12% annually. The industry has largely been unregulated up until 15 November 2013, when the South African government amended the Medicines and Related Substance Control Act (Act 101 of 1965) to include the definition of “Complementary Medicines” and “Health Supplements”. The emphasis of the new regulations is largely on the quality and safety of CAMS products. Manufacturers therefore need to demonstrate that the active ingredients used in manufacturing will be of an appropriate and consistent quality. The research question therefore is: Can a chemometric multivariate model be used to develop a rapid, cost effective method to quantify casticin, the major chemical constituent of Vitex agnus-castus (VAC) that can be used during routine quality control procedures? The primary aim of this study was to prepare a validated method using fourier transform infrared spectroscopy (FTIR) to quantify the casticin content in VAC fruit. The results from the HPLC analysis were as follows; the penduletin eluted at a retention time of 12.419 ± 0.376 minutes. The casticin eluted at a retention time of 12.943 ± 0.018 minutes. The casticin content for the samples ranged from 0.0115 – 0.0147% m/m casticin content with an average of 0.0134%. This is well below the pharmacopoeia requirement of not less than (NLT) 0.08% casticin content as described in the British Pharmacopoeia (BP). The results obtained from the HPLC analysis were used to construct the FTIR calibration model. The calibration model consisted of 18 spectra with 530 selected data points. The model was specific for casticin as spectral regions in the calibration model can be correlated to a known IR spectral response associated with the carbonyl group of casticin. The calibration equation in the xii form of % m/m casticin content had a coefficient of determination (R2) value of 0.9855 and a root mean square error of cross-validation (RMSECV) of 0.000119. The accuracy of the model had recoveries of between 98 - 102% for the actual vs true prediction. The percentage relative standard deviation (%RSD) between nine repeated measurements was 3.46%, this does not meet the International Conference of Harmonisation (ICH) requirement for precision of not more than (NMT) 2% RSD. The range of the calibration model was between 0.01147 and 0.01469 % m/m casticin content as established by the calibration model. The robustness of the method was assessed by challenging the model with samples that fall outside of the concentration of range of the model. This was established by quantifying previously scanned samples of VAC that is not part of the calibration set. The model was able to verify if the tested samples prediction was outside of the validated calibration range. The method was subsequently also challenged with a sample of a different identity to VAC. The model indicated that the sample tested does not fall in the range of the method and was clearly recognised as an outlier. The method was rapid and does not require any expensive solvents or timeconsuming sample preparation. However, the method does not meet the ICH requirements for method validation, the method does show potential and further method development and expansion of the calibration model can ensure that the method be validated.
- Full Text:
- Date Issued: 2018
The role of women's agricultural cooperatives in meeting United Nations sustainable development goals
- Authors: Boni, Ntomboxolo
- Date: 2018
- Subjects: Millennium Development Goals , Agriculture, Cooperative -- South Africa , Cooperative societies -- South Africa , Women in agriculture -- South Africa , Rural development -- South Africa , Sustainable development -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/21768 , vital:29775
- Description: The majority of the people in South Africa were poor prior 1994, especially those in the rural areas. Poverty in the rural areas affected mostly the women. The government of South Africa designed support programmes to mainstream women into the economy, although it had its own challenges, such as the non-participation of women in their own development and the top-down approach that at times was used by the government in the implementation of the programmes. Owing to the nature of the rural areas, agriculture was identified as a sector that had a potential to improve the economy in order to address the challenges of unemployment, poverty and inequality. Since 2005 the concept of cooperative development has been a vehicle that has the potential to address the aforementioned challenges. In order for the cooperative development to run efficiently and effectively and in line with the cooperative principles and values, the government should keep the independence of this sector in mind by engaging the cooperatives in all the activities that were affecting the cooperative sector through their cooperative movement.The findings of the study showed that the agricultural cooperatives have not yet addressed poverty fully. All their members were employed and at times employment opportunities were extended to their community members, but the income earned was not satisfying its members. The women felt that they were not in control of their development as they lacked the capacity to lead and they were still led by the men in their cooperatives.
- Full Text:
- Date Issued: 2018
- Authors: Boni, Ntomboxolo
- Date: 2018
- Subjects: Millennium Development Goals , Agriculture, Cooperative -- South Africa , Cooperative societies -- South Africa , Women in agriculture -- South Africa , Rural development -- South Africa , Sustainable development -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/21768 , vital:29775
- Description: The majority of the people in South Africa were poor prior 1994, especially those in the rural areas. Poverty in the rural areas affected mostly the women. The government of South Africa designed support programmes to mainstream women into the economy, although it had its own challenges, such as the non-participation of women in their own development and the top-down approach that at times was used by the government in the implementation of the programmes. Owing to the nature of the rural areas, agriculture was identified as a sector that had a potential to improve the economy in order to address the challenges of unemployment, poverty and inequality. Since 2005 the concept of cooperative development has been a vehicle that has the potential to address the aforementioned challenges. In order for the cooperative development to run efficiently and effectively and in line with the cooperative principles and values, the government should keep the independence of this sector in mind by engaging the cooperatives in all the activities that were affecting the cooperative sector through their cooperative movement.The findings of the study showed that the agricultural cooperatives have not yet addressed poverty fully. All their members were employed and at times employment opportunities were extended to their community members, but the income earned was not satisfying its members. The women felt that they were not in control of their development as they lacked the capacity to lead and they were still led by the men in their cooperatives.
- Full Text:
- Date Issued: 2018
Mechanisms for implementing affirmative action
- Authors: Nongogo, Nqabisa Thandazile
- Date: 2018
- Subjects: Affirmative action programs -- South Africa , Minorities -- Employment -- South Africa , Affirmative action programs -- Law and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/33475 , vital:32878
- Description: The aim of this study was to analyse the effective implementation of affirmative action. In South Africa. Affirmative action is seen as a means of correcting historical injustices and levelling the playing fields to enable all South Africans to gain equal access to opportunities from which they were previously restricted. This study observed that even though South Africa is now governed by a new democratic order historical workplace inequalities exists which still need to be addressed. Further it was noted that not only compelled to redress inequalities by the Constitution, the South African government was motivated by the ILO to enact laws that would prohibit discrimination and promote the economic advancement of the majority. Therefore, in an effort to narrow the gap between previously advantaged and disadvantaged individuals, the government passed a series of employment laws mandating, amongst other things, affirmative action. By doing so the South African government sought to ensure that all employers are compelled to take positive steps to redress disadvantage and inequality. Be that as it may, the study revealed that affirmative action is theoretically justifiable and has an important role in the achievement of equal opportunities and equality of outcome but in practice, various problems exist. Generally, the study reveals that notwithstanding the legislative framework of affirmative action in South Africa, inequalities continues to exist in employment, a clear signal of inadequate implementation of affirmative action. The study reveals that black people, women and unable persons are identified as primary victims of workplace inequalities. Continuity of work inequalities are statistically portrayed graphically in this year’s (2017) Quarterly Labour Force Survey (QLFS) conducted and published by Statistics South Africa on the Economically Active Population (EAP) still indicates no confidence to implementation of affirmative action measures nationwide. Reviews of implementation of affirmative action, recruitment strategies, retrenchment plans are strongly proposed to combat controversies and challenges surrounding the implementation of affirmative action. A sunset clause is highly recommended to projectize affirmative action. Similarly, with determined advocacy for affirmative action, the study anticipates progressive equality and sustainable justice in South African employment in the immediate future. Chapter five of this study recommends remedial measures to address the challenges and impediments for effective implementation of affirmative action.
- Full Text:
- Date Issued: 2018
- Authors: Nongogo, Nqabisa Thandazile
- Date: 2018
- Subjects: Affirmative action programs -- South Africa , Minorities -- Employment -- South Africa , Affirmative action programs -- Law and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/33475 , vital:32878
- Description: The aim of this study was to analyse the effective implementation of affirmative action. In South Africa. Affirmative action is seen as a means of correcting historical injustices and levelling the playing fields to enable all South Africans to gain equal access to opportunities from which they were previously restricted. This study observed that even though South Africa is now governed by a new democratic order historical workplace inequalities exists which still need to be addressed. Further it was noted that not only compelled to redress inequalities by the Constitution, the South African government was motivated by the ILO to enact laws that would prohibit discrimination and promote the economic advancement of the majority. Therefore, in an effort to narrow the gap between previously advantaged and disadvantaged individuals, the government passed a series of employment laws mandating, amongst other things, affirmative action. By doing so the South African government sought to ensure that all employers are compelled to take positive steps to redress disadvantage and inequality. Be that as it may, the study revealed that affirmative action is theoretically justifiable and has an important role in the achievement of equal opportunities and equality of outcome but in practice, various problems exist. Generally, the study reveals that notwithstanding the legislative framework of affirmative action in South Africa, inequalities continues to exist in employment, a clear signal of inadequate implementation of affirmative action. The study reveals that black people, women and unable persons are identified as primary victims of workplace inequalities. Continuity of work inequalities are statistically portrayed graphically in this year’s (2017) Quarterly Labour Force Survey (QLFS) conducted and published by Statistics South Africa on the Economically Active Population (EAP) still indicates no confidence to implementation of affirmative action measures nationwide. Reviews of implementation of affirmative action, recruitment strategies, retrenchment plans are strongly proposed to combat controversies and challenges surrounding the implementation of affirmative action. A sunset clause is highly recommended to projectize affirmative action. Similarly, with determined advocacy for affirmative action, the study anticipates progressive equality and sustainable justice in South African employment in the immediate future. Chapter five of this study recommends remedial measures to address the challenges and impediments for effective implementation of affirmative action.
- Full Text:
- Date Issued: 2018
Experience-based lessons from males in the northern areas of Port Elizabeth on factors that has protected them from becoming involved in gangsterism
- Authors: Davids, Desira Julie-Anne
- Date: 2018
- Subjects: Gang prevention -- South Africa -- Port Elizabeth , Youth -- South Africa -- Port Elizabeth -- Social conditions , Social work with youth -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/21994 , vital:29810
- Description: Limited research exists, both internationally and in the South African context, on factors protecting community members from becoming involved in gangsterism. This phenomenon has been found to be more prevalent in so-called ‘coloured’ communities and predominantly amongst males. Existing research on gangsterism mainly focus on the history and origin of gangsterism, risk factors that cause certain youth to be more vulnerable in becoming involved in gangs, and specific interventions aimed at curbing the phenomenon. The proposed study therefore aimed to explore and describe the experience-based lessons from selected males on factors that have protected them from becoming involved in gangsterism. The study employed a qualitative research approach that was explorative, descriptive and contextual in design. Participants were chosen through a purposive sampling technique and data was collected using semi-structured interviews. The trustworthiness of the research process and the findings was enhanced by employing a variety of data verification strategies. The study utilised the Ecological Systems and Resilience models as theoretical lenses. The study found that the benefits of family support, influence of faith or religion, positive role models and opportunities for furthering one’s education could be cited amongst the factors that protected participants from becoming involved in gangsterism. Amongst the recommendations of the study was lobbying for tertiary education specifically for young boys from previously disadvantaged communities plagued by social ills such as gangsterism, the restoration of disintegrated family units through the assistance of professionals, as well as the restoration and strengthening of the role of spiritual leaders in their involvement in the moral regeneration of communities. It is anticipated that findings of this study will be helpful in understanding the factors that protected males from becoming involved in gangsterism and make recommendations on how these protective factors could be strengthened so as to prevent more males from becoming involved in gangsterism.
- Full Text:
- Date Issued: 2018
- Authors: Davids, Desira Julie-Anne
- Date: 2018
- Subjects: Gang prevention -- South Africa -- Port Elizabeth , Youth -- South Africa -- Port Elizabeth -- Social conditions , Social work with youth -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/21994 , vital:29810
- Description: Limited research exists, both internationally and in the South African context, on factors protecting community members from becoming involved in gangsterism. This phenomenon has been found to be more prevalent in so-called ‘coloured’ communities and predominantly amongst males. Existing research on gangsterism mainly focus on the history and origin of gangsterism, risk factors that cause certain youth to be more vulnerable in becoming involved in gangs, and specific interventions aimed at curbing the phenomenon. The proposed study therefore aimed to explore and describe the experience-based lessons from selected males on factors that have protected them from becoming involved in gangsterism. The study employed a qualitative research approach that was explorative, descriptive and contextual in design. Participants were chosen through a purposive sampling technique and data was collected using semi-structured interviews. The trustworthiness of the research process and the findings was enhanced by employing a variety of data verification strategies. The study utilised the Ecological Systems and Resilience models as theoretical lenses. The study found that the benefits of family support, influence of faith or religion, positive role models and opportunities for furthering one’s education could be cited amongst the factors that protected participants from becoming involved in gangsterism. Amongst the recommendations of the study was lobbying for tertiary education specifically for young boys from previously disadvantaged communities plagued by social ills such as gangsterism, the restoration of disintegrated family units through the assistance of professionals, as well as the restoration and strengthening of the role of spiritual leaders in their involvement in the moral regeneration of communities. It is anticipated that findings of this study will be helpful in understanding the factors that protected males from becoming involved in gangsterism and make recommendations on how these protective factors could be strengthened so as to prevent more males from becoming involved in gangsterism.
- Full Text:
- Date Issued: 2018
Analysing the role of enterprise and supplier development within Mercedes Benz South Africa in improving their B-BBEE scorecard
- Authors: Silinga, Zukiswa
- Date: 2018
- Subjects: Affirmative action programs -- South Africa , Business enterprises, Black -- South Africa , Blacks -- South Africa -- Economic conditions , Employee empowerment -- South Africa , South Africa -- Economic policy
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/23208 , vital:30455
- Description: This research is born out of the realisation of the unique challenges that the Broad-Based Black Economic Empowerment (B-BBEE) policy required from the private sector in South Africa, with Enterprise and Supplier Development (ESD) being one of the components of the B-BBEE’s economic empowerment strategy. Over the years, the B-BBEE’s role has been one of ensuring that economic empowerment of historically disadvantaged individuals was addressed. The role of the B-BBEE policy is described as the framework that targets the reform of the economy, reduction of poverty and inequality and empowerment of those individuals that were historically disadvantaged (Patel & Graham, 2012, p. 194). The automotive industry is South Africa’s most important and largest sector, making a great contribution to the country’s GDP. It is responsible for the employment of many people in the country, including employment in the component manufacturers and tyre industry. With these linkages throughout the economy, the government has identified the automotive industry as a vital growth sector. Government is certain that this sector will address one of the major challenges for economic growth in South Africa, which is unemployment. In the year 2015, the B-BBEE Act was amended with new compliance requirements and this changed the B-BBEE rating of Mercedes Benz South Africa (MBSA), resulting in a reduction of the company’s rating. The changes to the standard, particularly the ownership component, resulted in challenges for multinational companies such as MBSA, and an opportunity to improve the rating was identified in the ESD component sector. If these new compliance requirements were not addressed by MBSA, a predictable reduction in B-BBEE status would occur, resulting in a loss of business with government and provision of government incentives. The objective of this research study was to analyse the role that ESD plays within MBSA in improving their B-BBEE scorecard, as part of its overall B-BBEE strategy. This study was sculpted on the concept that the role of ESD at MBSA is related to (a) preferential procurement, (b) skills transfer, and (c) mentoring and a detailed literature review was conducted for these variables as well as for ESD. In testing the above research objective, the researcher utilised statistical analysis methods to reach a conclusion with regard to the relationship of ESD to these variables. A positivistic research paradigm (quantitative) was selected in order to test the objective by using hypothesis testing. An empirical study was undertaken by means of a survey with a questionnaire utilised as a data collecting tool and distributed using the supplier database of MBSA. The aim of the questionnaire was to validate the outcomes obtained from the theoretical overview. Out of a sample of 116 respondents employed at the suppliers, only 92 responses were received, thus representing a 79% response rate, which is considered acceptable. The key findings of the study indicated that preferential procurement, skills development and mentoring play a significant role in the promotion of ESD. Preferential procurement indicated a stronger association than the other variables, and thus it was recommended that MBSA place importance on this variable. Based on these findings, recommendations were made to the management of MBSA in an effort to improve the ESD component of the B-BBEE score of the company. As a way of addressing some of the challenges automotive manufacturers face, suggestions for future research were made.
- Full Text:
- Date Issued: 2018
- Authors: Silinga, Zukiswa
- Date: 2018
- Subjects: Affirmative action programs -- South Africa , Business enterprises, Black -- South Africa , Blacks -- South Africa -- Economic conditions , Employee empowerment -- South Africa , South Africa -- Economic policy
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/23208 , vital:30455
- Description: This research is born out of the realisation of the unique challenges that the Broad-Based Black Economic Empowerment (B-BBEE) policy required from the private sector in South Africa, with Enterprise and Supplier Development (ESD) being one of the components of the B-BBEE’s economic empowerment strategy. Over the years, the B-BBEE’s role has been one of ensuring that economic empowerment of historically disadvantaged individuals was addressed. The role of the B-BBEE policy is described as the framework that targets the reform of the economy, reduction of poverty and inequality and empowerment of those individuals that were historically disadvantaged (Patel & Graham, 2012, p. 194). The automotive industry is South Africa’s most important and largest sector, making a great contribution to the country’s GDP. It is responsible for the employment of many people in the country, including employment in the component manufacturers and tyre industry. With these linkages throughout the economy, the government has identified the automotive industry as a vital growth sector. Government is certain that this sector will address one of the major challenges for economic growth in South Africa, which is unemployment. In the year 2015, the B-BBEE Act was amended with new compliance requirements and this changed the B-BBEE rating of Mercedes Benz South Africa (MBSA), resulting in a reduction of the company’s rating. The changes to the standard, particularly the ownership component, resulted in challenges for multinational companies such as MBSA, and an opportunity to improve the rating was identified in the ESD component sector. If these new compliance requirements were not addressed by MBSA, a predictable reduction in B-BBEE status would occur, resulting in a loss of business with government and provision of government incentives. The objective of this research study was to analyse the role that ESD plays within MBSA in improving their B-BBEE scorecard, as part of its overall B-BBEE strategy. This study was sculpted on the concept that the role of ESD at MBSA is related to (a) preferential procurement, (b) skills transfer, and (c) mentoring and a detailed literature review was conducted for these variables as well as for ESD. In testing the above research objective, the researcher utilised statistical analysis methods to reach a conclusion with regard to the relationship of ESD to these variables. A positivistic research paradigm (quantitative) was selected in order to test the objective by using hypothesis testing. An empirical study was undertaken by means of a survey with a questionnaire utilised as a data collecting tool and distributed using the supplier database of MBSA. The aim of the questionnaire was to validate the outcomes obtained from the theoretical overview. Out of a sample of 116 respondents employed at the suppliers, only 92 responses were received, thus representing a 79% response rate, which is considered acceptable. The key findings of the study indicated that preferential procurement, skills development and mentoring play a significant role in the promotion of ESD. Preferential procurement indicated a stronger association than the other variables, and thus it was recommended that MBSA place importance on this variable. Based on these findings, recommendations were made to the management of MBSA in an effort to improve the ESD component of the B-BBEE score of the company. As a way of addressing some of the challenges automotive manufacturers face, suggestions for future research were made.
- Full Text:
- Date Issued: 2018
An evaluation of the role of cost management control systems on organisational performance in public enterprises in Namibia: a case study of the Namibia airports company
- Authors: Shindobo, Teopolina
- Date: 2018
- Subjects: Cost accounting , Activity-based costing , Performance standards -- Namibia -- Evaluation , Organizational effectiveness -- Namibia
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/35785 , vital:33812
- Description: The primary goal of this study was to evaluate the role of cost management control systems (CMCS) on organisational performance of public enterprises in Namibia, using Namibia Airports Company (NAC) as a case study organisation. NAC uses the activity based costing (ABC) management control system and is still making losses, the auditor General have recommended that there is a need to evaluate the CMCS used by the NAC and their expenditure. In pursuing the primary objective of the study, four secondary objectives were therefore developed. The first objective was concerned with evaluating the purpose of the CMCSs in organisational decision making process. The second objective was concerned with analysing the effect of CMCSs on organisational performance in public enterprises. This was also achieved through a comprehensive review of literature. The third objective dealt with the design of a suitable methodology. The last objective was concerned with conclusions and recommendations of the study. The study followed a quantitative research methodology and a total of 100 questionnaires were self-administered to the respondents. Sixty-five questionnaires were returned with usable responses and were captured for analysis. Statistical analysis was applied in order to meet the requirements of research methodology as well as record and analyse the research findings. The study used descriptive statistics, reliability statistics, factor analysis and one way variance analysis (ANOVAs). Factor analysis was performed on the elements used to measure the impacts of CMCSs on the organisational performance of the Namibia Airports Company. Four key impacts of CMCSs were identified in this study. ANOVAs were employed as a way of determining significant differences between groups with regard to the factors that were identified. The finding of the study revealed that, the level of employee involvement in cost management activities is relatively weak at Namibia Airports Company despite a higher frequency of using the CMCSs. There is a significant effect on financial performance of the organisation as a result of employing CMCSs. The significant impacts of CMCSs on the organisational performance of the Namibia Airports Company include opportunities for improving financial performance management, efficiency in service delivery, and strategic decisions.
- Full Text:
- Date Issued: 2018
- Authors: Shindobo, Teopolina
- Date: 2018
- Subjects: Cost accounting , Activity-based costing , Performance standards -- Namibia -- Evaluation , Organizational effectiveness -- Namibia
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/35785 , vital:33812
- Description: The primary goal of this study was to evaluate the role of cost management control systems (CMCS) on organisational performance of public enterprises in Namibia, using Namibia Airports Company (NAC) as a case study organisation. NAC uses the activity based costing (ABC) management control system and is still making losses, the auditor General have recommended that there is a need to evaluate the CMCS used by the NAC and their expenditure. In pursuing the primary objective of the study, four secondary objectives were therefore developed. The first objective was concerned with evaluating the purpose of the CMCSs in organisational decision making process. The second objective was concerned with analysing the effect of CMCSs on organisational performance in public enterprises. This was also achieved through a comprehensive review of literature. The third objective dealt with the design of a suitable methodology. The last objective was concerned with conclusions and recommendations of the study. The study followed a quantitative research methodology and a total of 100 questionnaires were self-administered to the respondents. Sixty-five questionnaires were returned with usable responses and were captured for analysis. Statistical analysis was applied in order to meet the requirements of research methodology as well as record and analyse the research findings. The study used descriptive statistics, reliability statistics, factor analysis and one way variance analysis (ANOVAs). Factor analysis was performed on the elements used to measure the impacts of CMCSs on the organisational performance of the Namibia Airports Company. Four key impacts of CMCSs were identified in this study. ANOVAs were employed as a way of determining significant differences between groups with regard to the factors that were identified. The finding of the study revealed that, the level of employee involvement in cost management activities is relatively weak at Namibia Airports Company despite a higher frequency of using the CMCSs. There is a significant effect on financial performance of the organisation as a result of employing CMCSs. The significant impacts of CMCSs on the organisational performance of the Namibia Airports Company include opportunities for improving financial performance management, efficiency in service delivery, and strategic decisions.
- Full Text:
- Date Issued: 2018
Mature South African students’ perceptions of their transition experiences into and from university education
- Authors: Zietsman, Louis Frederick
- Date: 2018
- Subjects: Adult college students -- South Africa , Adult education -- South Africa , Education, Higher -- South Africa , Continuing education -- South Africa , Universities and colleges -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/36126 , vital:33896
- Description: Mature students and their experience of tertiary education is an area of career psychology in which there is currently a lack of research. In particular, little published data related to the transition experience of mature students into and from tertiary education is available internationally and there is even less literature examining these students within the African and South African context. This study contributes to psychology‟s broad body of knowledge as it explores the perceptions of previously employed final year South African students on their transition experience into and from tertiary education. The researcher utilised a qualitative research approach. A non-probability purposive sampling strategy was employed and semi-structured interviews were conducted with five participants. All participants were considered to be mature students in their final year of university study. Interviews were conducted until data saturation was reached. The data obtained was subjected to thematic content analysis using Tesch‟s model. Lincoln and Guba‟s model was used to assess the trustworthiness of the data obtained. The findings revealed several factors influencing mature students‟ entry or re-entry into tertiary education. Participants‟ experience of tertiary education was enriching on both a personal/career level and participants were confident in their abilities. Furthermore, it was found that transition towards a new career starts during their tertiary study and that relying on experiences of their previous job aided them in their transition from tertiary education to new career. Limitations of the study, recommendations for further research and contributions of the research were identified.
- Full Text:
- Date Issued: 2018
- Authors: Zietsman, Louis Frederick
- Date: 2018
- Subjects: Adult college students -- South Africa , Adult education -- South Africa , Education, Higher -- South Africa , Continuing education -- South Africa , Universities and colleges -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/36126 , vital:33896
- Description: Mature students and their experience of tertiary education is an area of career psychology in which there is currently a lack of research. In particular, little published data related to the transition experience of mature students into and from tertiary education is available internationally and there is even less literature examining these students within the African and South African context. This study contributes to psychology‟s broad body of knowledge as it explores the perceptions of previously employed final year South African students on their transition experience into and from tertiary education. The researcher utilised a qualitative research approach. A non-probability purposive sampling strategy was employed and semi-structured interviews were conducted with five participants. All participants were considered to be mature students in their final year of university study. Interviews were conducted until data saturation was reached. The data obtained was subjected to thematic content analysis using Tesch‟s model. Lincoln and Guba‟s model was used to assess the trustworthiness of the data obtained. The findings revealed several factors influencing mature students‟ entry or re-entry into tertiary education. Participants‟ experience of tertiary education was enriching on both a personal/career level and participants were confident in their abilities. Furthermore, it was found that transition towards a new career starts during their tertiary study and that relying on experiences of their previous job aided them in their transition from tertiary education to new career. Limitations of the study, recommendations for further research and contributions of the research were identified.
- Full Text:
- Date Issued: 2018
Optimising x-ray referral systems to ensure patient safety during ionising radiographic examination in Nelson Mandela Bay Health District
- Authors: Munnick, Derna Camille
- Date: 2018
- Subjects: X-rays -- Diffraction -- Safety measures , Radiography, Medical , Medical personnel and patients
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/22824 , vital:30105
- Description: X-ray request forms are used at hospitals and primary health care centres (PHCC) by health care professionals (HCP) to communicate with radiologists and radiographers when referring patients for ionising radiographic (x-rays) examinations. The x-ray request form and the radiological report are medico-legal documents. However, the importance of adequately completed x-ray request forms, appear to be underestimated. The HCP must write a brief clinical history on the x-ray request form that justifies the ionising radiographic (x-ray) examination referral, enabling radiographers and radiologists to have a better understanding of the patient’s clinical condition. An adequately completed x-ray request form assist the radiographer to make decisions regarding patient safety techniques and standard operating protocols that need to be applied. The radiologist will also have a better understanding of the patient’s clinical condition when reporting on the x-ray projections based on the clinical information supplied on the x-ray request form. The primary objective of this study was to explore and describe the adequacy of completion of x-ray request forms in order to optimise ionising radiographic referrals (x-ray requests) to ensure patient safety during ionising radiographic examinations at PHCC’s in NMBHD. A quantitative research design with an explorative, descriptive, and contextual approach was undertaken. The data was collected using an evaluation form checklist that the radiographer responsible for the requested x-ray examination completed. Data was gathered at all five PHCC’s, offering x-ray services, in the NMBHD by qualified radiographers evaluating the adequacy of completion of the x-ray request forms using an evaluation form checklist with an online program QuestionPro. Strategies to ensure validity and reliability in the study were undertaken. Ethical principles adhered to included informed consent, privacy, anonymity and confidentiality, gaining ethical permission to do the study and approval to enter the research site. The results of the study revealed that none of the 582 x-ray request forms evaluated were adequately completed. The fields on the x-ray request forms that were most frequently completed were the surname, clinical history, examination requested and the referring HCP details all had a total percentage correct completion of 90% and above. The fields most frequently omitted were last menstrual period (LMP) of females of child-bearing age and an indication of previous x-rays. The patient’s age and how to address the patient were also frequently incomplete. The researcher made recommendations to the NMBHD on how the x-ray referral system by means of the x-ray request form could be optimised of in order to increase patient safety during ionising radiographic (x-ray) examinations. Recommendations made to the Nelson Mandela Bay Health District (NMBHD) was based on the findings of the research study to ensure optimisation of x-ray requests concerning the completion of the x-ray request forms to ensure patient safety during x-ray examination procedures. Recommendations to the NMBHD were as follows:Education and training, Distribution of guidelines, Keeping a record of HCP’s qualifications, Consent form must be completed for all female patients of child-bearing age, Redesign the current x-ray request form. The researcher also made recommendations for possible future studies which could also increase patient safety during x-ray examinations and were as follows. The researcher suggested that this research could be applied at both public and private hospitals as well as in other health districts in the Eastern Cape to evaluate the adequacy of the completion of the x-ray request forms in the Eastern Cape. The researcher suggested a research study be done at PHCC’s in NMBHD, on the justification and the dose levels used for the frequently requested x-rays. The researcher recommended an accessible health information exchange system for radiography in Port Elizabeth and surrounding health institutions to reduce repeated x-ray requests for patients who visit different health institutions for the same clinical problem. The researcher concluded from the results of the statistical analyses of the study that generally the adequacy of completion of the x-ray request forms at the PHCC’s in NMBHD was average. Improperly or incomplete fields on the x-ray request forms were observed from the results. Indicating that referring HCP’s at the PHCC’s of NMBHD could optimise the x-ray referral system by means of correct, accurate and comprehensive completion of the x-ray request form to ensure patient safety during ionising radiographic examinations.
- Full Text:
- Date Issued: 2018
- Authors: Munnick, Derna Camille
- Date: 2018
- Subjects: X-rays -- Diffraction -- Safety measures , Radiography, Medical , Medical personnel and patients
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/22824 , vital:30105
- Description: X-ray request forms are used at hospitals and primary health care centres (PHCC) by health care professionals (HCP) to communicate with radiologists and radiographers when referring patients for ionising radiographic (x-rays) examinations. The x-ray request form and the radiological report are medico-legal documents. However, the importance of adequately completed x-ray request forms, appear to be underestimated. The HCP must write a brief clinical history on the x-ray request form that justifies the ionising radiographic (x-ray) examination referral, enabling radiographers and radiologists to have a better understanding of the patient’s clinical condition. An adequately completed x-ray request form assist the radiographer to make decisions regarding patient safety techniques and standard operating protocols that need to be applied. The radiologist will also have a better understanding of the patient’s clinical condition when reporting on the x-ray projections based on the clinical information supplied on the x-ray request form. The primary objective of this study was to explore and describe the adequacy of completion of x-ray request forms in order to optimise ionising radiographic referrals (x-ray requests) to ensure patient safety during ionising radiographic examinations at PHCC’s in NMBHD. A quantitative research design with an explorative, descriptive, and contextual approach was undertaken. The data was collected using an evaluation form checklist that the radiographer responsible for the requested x-ray examination completed. Data was gathered at all five PHCC’s, offering x-ray services, in the NMBHD by qualified radiographers evaluating the adequacy of completion of the x-ray request forms using an evaluation form checklist with an online program QuestionPro. Strategies to ensure validity and reliability in the study were undertaken. Ethical principles adhered to included informed consent, privacy, anonymity and confidentiality, gaining ethical permission to do the study and approval to enter the research site. The results of the study revealed that none of the 582 x-ray request forms evaluated were adequately completed. The fields on the x-ray request forms that were most frequently completed were the surname, clinical history, examination requested and the referring HCP details all had a total percentage correct completion of 90% and above. The fields most frequently omitted were last menstrual period (LMP) of females of child-bearing age and an indication of previous x-rays. The patient’s age and how to address the patient were also frequently incomplete. The researcher made recommendations to the NMBHD on how the x-ray referral system by means of the x-ray request form could be optimised of in order to increase patient safety during ionising radiographic (x-ray) examinations. Recommendations made to the Nelson Mandela Bay Health District (NMBHD) was based on the findings of the research study to ensure optimisation of x-ray requests concerning the completion of the x-ray request forms to ensure patient safety during x-ray examination procedures. Recommendations to the NMBHD were as follows:Education and training, Distribution of guidelines, Keeping a record of HCP’s qualifications, Consent form must be completed for all female patients of child-bearing age, Redesign the current x-ray request form. The researcher also made recommendations for possible future studies which could also increase patient safety during x-ray examinations and were as follows. The researcher suggested that this research could be applied at both public and private hospitals as well as in other health districts in the Eastern Cape to evaluate the adequacy of the completion of the x-ray request forms in the Eastern Cape. The researcher suggested a research study be done at PHCC’s in NMBHD, on the justification and the dose levels used for the frequently requested x-rays. The researcher recommended an accessible health information exchange system for radiography in Port Elizabeth and surrounding health institutions to reduce repeated x-ray requests for patients who visit different health institutions for the same clinical problem. The researcher concluded from the results of the statistical analyses of the study that generally the adequacy of completion of the x-ray request forms at the PHCC’s in NMBHD was average. Improperly or incomplete fields on the x-ray request forms were observed from the results. Indicating that referring HCP’s at the PHCC’s of NMBHD could optimise the x-ray referral system by means of correct, accurate and comprehensive completion of the x-ray request form to ensure patient safety during ionising radiographic examinations.
- Full Text:
- Date Issued: 2018
Conflict narratives of young males in the Blue Crane Route Municipality who experienced domestic violence during childhood
- Authors: Martin, Jonathan Malvin
- Date: 2018
- Subjects: Family violence , Abusive men -- Psychology , Abusive men -- Rehabilitation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/31863 , vital:31855
- Description: Domestic Violence is a growing concern globally and currently one of the most dominant negative social forces in South Africa. Many children are experiencing or witnessing Domestic Violence in their households or community, with potentially devastating consequences (Dawes, Long, Alexander & Ward, 2007; Burton, 2007). This study investigates the personal conflict narratives of eleven young adult males who experienced Domestic Violence as children. The young men completed a self-administered questionnaire which included a request for a personal conflict narrative or story. The study then engaged these young men in a two-day workshop of an international conflict management programme, known as the Alternatives to Violence Project (AVP), which teaches attitudes and strategies to manage conflict (such as self-awareness, empathy and community-building). After the workshop, the participants were asked to re-write their conflict narratives and any changes in their attitudes and strategies to conflict were discussed in group interviews. The study was qualitative; that is, exploratory, descriptive and contextual in nature. Non-probability purposive sampling was employed to identify suitable young adult males between 18-35 years of age from the Blue Crane Route Municipality (Somerset East and Pearston), who experienced Domestic Violence during their childhood. Workers at Victim Support Centres in the Blue Crane Route Municipality assisted with the recruitment of potential participants and requested permission to provide the researcher with their personal information. In analysing the data obtained, the study used a narrative analysis approach to the participants’ pre- and post-AVP workshop conflict narratives. The trustworthiness of the research process and findings was enhanced by employing a variety of data verification strategies.
- Full Text:
- Date Issued: 2018
- Authors: Martin, Jonathan Malvin
- Date: 2018
- Subjects: Family violence , Abusive men -- Psychology , Abusive men -- Rehabilitation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/31863 , vital:31855
- Description: Domestic Violence is a growing concern globally and currently one of the most dominant negative social forces in South Africa. Many children are experiencing or witnessing Domestic Violence in their households or community, with potentially devastating consequences (Dawes, Long, Alexander & Ward, 2007; Burton, 2007). This study investigates the personal conflict narratives of eleven young adult males who experienced Domestic Violence as children. The young men completed a self-administered questionnaire which included a request for a personal conflict narrative or story. The study then engaged these young men in a two-day workshop of an international conflict management programme, known as the Alternatives to Violence Project (AVP), which teaches attitudes and strategies to manage conflict (such as self-awareness, empathy and community-building). After the workshop, the participants were asked to re-write their conflict narratives and any changes in their attitudes and strategies to conflict were discussed in group interviews. The study was qualitative; that is, exploratory, descriptive and contextual in nature. Non-probability purposive sampling was employed to identify suitable young adult males between 18-35 years of age from the Blue Crane Route Municipality (Somerset East and Pearston), who experienced Domestic Violence during their childhood. Workers at Victim Support Centres in the Blue Crane Route Municipality assisted with the recruitment of potential participants and requested permission to provide the researcher with their personal information. In analysing the data obtained, the study used a narrative analysis approach to the participants’ pre- and post-AVP workshop conflict narratives. The trustworthiness of the research process and findings was enhanced by employing a variety of data verification strategies.
- Full Text:
- Date Issued: 2018
The foraging ecology of Wedge-tailed Shearwaters (Ardenna Pacifica) in the tropical Western Indian Ocean
- Authors: Keys, Danielle Zuanda
- Date: 2018
- Subjects: Birds of prey -- Behavior -- South Africa -- Western Cape , Animal behavior , Wildlife conservation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/31251 , vital:31348
- Description: The distribution and abundance of prey largely influences how marine predators forage. Thus, understanding how marine predators respond to such changes becomes imperative when making decisions in marine spatial planning, especially in light of global climate change. Tropical marine systems are known for their relatively low productivity and high unpredictability of prey resources. Compared to higher latitudes, very few studies on seabirds have been implemented in the tropics. The Wedge-tailed Shearwater Ardenna pacifica is an Indo-Pacific tropical seabird with a wide distributional range. However, like many other seabirds, its population numbers are currently declining. Very little is known about the at-sea distribution of Wedge-tailed Shearwaters in the tropical western Indian Ocean. Therefore, this thesis investigates the foraging ecology of Wedge-tailed Shearwaters in the western Indian Ocean by tracking the fine scale movements of individuals at sea. This study was conducted in two different oceanic environments, namely D’Arros Island and Fouquet Island, St Joseph Atoll in the Amirantes Group in Seychelles archipelago as well as Réunion Island in the Mascarene archipelago during the Wedge-tailed Shearwaters breeding seasons. Here I aimed to investigate the foraging distribution of Wedge-tailed Shearwaters on Réunion Island in relation to different stages of the breeding period. I also compared the foraging ecology of all three populations, subjected to different abiotic and biotic factors. Furthermore, I investigated foraging site fidelity in individuals and repeatability within individual flight characteristics. To my knowledge, this is the first study to comprehensively investigate the foraging ecology of Wedge-tailed Shearwaters using global positioning system (GPS) loggers. This study demonstrated that the Wedge-tailed Shearwaters implement flexible foraging strategies throughout different stages of their breeding period and between different islands. In Réunion, during the shearwater breeding season, sexual segregation was prominent during early chick rearing and both sexes implemented dual foraging. As suggested by previous studies, it is likely that long trips were implemented for self-maintenance, whereas multiple short trips were implemented to meet the high energetic demands of the chicks. Several important foraging areas were identified for these Wedge-tailed Shearwaters. During incubation, shearwaters from Réunion faithfully foraged towards the south east of Madagascar near the East Madagascar Current and flew over large areas of the Mascarene Basin. During chick rearing, shearwaters significantly constricted their range closer to the colony and exploited deep waters on the south-west of Réunion Island. Shearwaters concentrated near oceanographic features such as the Pérouse Seamount (which is a known area of high productivity) as well as the Bourdonnais Ridge. There was no clear evidence for spatial or sexual segregation between individuals from the two study colonies in Seychelles during incubation and birds utilized a broader foraging range than birds from Réunion. This is likely to be the result of a large annual phytoplankton bloom which coincides with the shearwater breeding season in Seychelles, providing many foraging opportunities within the Seychelles Basin. The shearwaters from Seychelles exploited the Amirante Basin, East Somali Basin, and parts of the Seychelles archipelago. Shearwaters from D’Arros flew further east and foraged in the Mascarene Basin. Shearwaters from all populations foraged over deep, relatively unproductive waters with relatively high sea surface temperatures which are similar oceanographic features favoured by tuna. Foraging plasticity between individuals from different colonies was observed with varying flight bearings, flight durations and the maximum distances travelled from their respective colonies. Shearwaters displayed dissimilar levels of site fidelity, where shearwaters from Réunion faithfully foraged towards south east Madagascar, while shearwaters from Seychelles foraged over a wide range over the Seychelles Basin. Foraging effort for shearwaters from Fouquet was lower than shearwaters from Reunion and they spent less time at sea and foraged closer to their colony. These difference in behaviour responses between colonies may be advantageous to shearwaters, indicating that they may be able to respond to some level of environmental variability resulting from climate change and anthropogenic pressures. Lastly, during chick rearing, though shearwaters showed low levels of repeatability in flight characterising, foraging site fidelity was high amongst some of the individuals. Here we see that shearwaters continuously rely on permanent features, like seamounts and possibly fish aggregating devices, which are known to attract high abundances of tuna. Shearwaters may to some extent be relying on memory to find prey in a seemingly unpredictable environment. This study has helped us gain valuable insight about the foraging ecology of Wedge-tailed Shearwaters in the western Indian Ocean. Together with similar studies determining the at-sea behaviour of seabirds, better informed recommendations can be made to marine spatial planners as to where much needed pelagic marine protection should be implemented to preserve marine life in this fascinating part of the global ocean.
- Full Text:
- Date Issued: 2018
- Authors: Keys, Danielle Zuanda
- Date: 2018
- Subjects: Birds of prey -- Behavior -- South Africa -- Western Cape , Animal behavior , Wildlife conservation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/31251 , vital:31348
- Description: The distribution and abundance of prey largely influences how marine predators forage. Thus, understanding how marine predators respond to such changes becomes imperative when making decisions in marine spatial planning, especially in light of global climate change. Tropical marine systems are known for their relatively low productivity and high unpredictability of prey resources. Compared to higher latitudes, very few studies on seabirds have been implemented in the tropics. The Wedge-tailed Shearwater Ardenna pacifica is an Indo-Pacific tropical seabird with a wide distributional range. However, like many other seabirds, its population numbers are currently declining. Very little is known about the at-sea distribution of Wedge-tailed Shearwaters in the tropical western Indian Ocean. Therefore, this thesis investigates the foraging ecology of Wedge-tailed Shearwaters in the western Indian Ocean by tracking the fine scale movements of individuals at sea. This study was conducted in two different oceanic environments, namely D’Arros Island and Fouquet Island, St Joseph Atoll in the Amirantes Group in Seychelles archipelago as well as Réunion Island in the Mascarene archipelago during the Wedge-tailed Shearwaters breeding seasons. Here I aimed to investigate the foraging distribution of Wedge-tailed Shearwaters on Réunion Island in relation to different stages of the breeding period. I also compared the foraging ecology of all three populations, subjected to different abiotic and biotic factors. Furthermore, I investigated foraging site fidelity in individuals and repeatability within individual flight characteristics. To my knowledge, this is the first study to comprehensively investigate the foraging ecology of Wedge-tailed Shearwaters using global positioning system (GPS) loggers. This study demonstrated that the Wedge-tailed Shearwaters implement flexible foraging strategies throughout different stages of their breeding period and between different islands. In Réunion, during the shearwater breeding season, sexual segregation was prominent during early chick rearing and both sexes implemented dual foraging. As suggested by previous studies, it is likely that long trips were implemented for self-maintenance, whereas multiple short trips were implemented to meet the high energetic demands of the chicks. Several important foraging areas were identified for these Wedge-tailed Shearwaters. During incubation, shearwaters from Réunion faithfully foraged towards the south east of Madagascar near the East Madagascar Current and flew over large areas of the Mascarene Basin. During chick rearing, shearwaters significantly constricted their range closer to the colony and exploited deep waters on the south-west of Réunion Island. Shearwaters concentrated near oceanographic features such as the Pérouse Seamount (which is a known area of high productivity) as well as the Bourdonnais Ridge. There was no clear evidence for spatial or sexual segregation between individuals from the two study colonies in Seychelles during incubation and birds utilized a broader foraging range than birds from Réunion. This is likely to be the result of a large annual phytoplankton bloom which coincides with the shearwater breeding season in Seychelles, providing many foraging opportunities within the Seychelles Basin. The shearwaters from Seychelles exploited the Amirante Basin, East Somali Basin, and parts of the Seychelles archipelago. Shearwaters from D’Arros flew further east and foraged in the Mascarene Basin. Shearwaters from all populations foraged over deep, relatively unproductive waters with relatively high sea surface temperatures which are similar oceanographic features favoured by tuna. Foraging plasticity between individuals from different colonies was observed with varying flight bearings, flight durations and the maximum distances travelled from their respective colonies. Shearwaters displayed dissimilar levels of site fidelity, where shearwaters from Réunion faithfully foraged towards south east Madagascar, while shearwaters from Seychelles foraged over a wide range over the Seychelles Basin. Foraging effort for shearwaters from Fouquet was lower than shearwaters from Reunion and they spent less time at sea and foraged closer to their colony. These difference in behaviour responses between colonies may be advantageous to shearwaters, indicating that they may be able to respond to some level of environmental variability resulting from climate change and anthropogenic pressures. Lastly, during chick rearing, though shearwaters showed low levels of repeatability in flight characterising, foraging site fidelity was high amongst some of the individuals. Here we see that shearwaters continuously rely on permanent features, like seamounts and possibly fish aggregating devices, which are known to attract high abundances of tuna. Shearwaters may to some extent be relying on memory to find prey in a seemingly unpredictable environment. This study has helped us gain valuable insight about the foraging ecology of Wedge-tailed Shearwaters in the western Indian Ocean. Together with similar studies determining the at-sea behaviour of seabirds, better informed recommendations can be made to marine spatial planners as to where much needed pelagic marine protection should be implemented to preserve marine life in this fascinating part of the global ocean.
- Full Text:
- Date Issued: 2018
A common currency for countries within the economic community of West African states
- Authors: Djessou, Oze Marie Pascale
- Date: 2018
- Subjects: Economic Community of West African States , Africa, West -- Economic integration , Africa -- Economic conditions
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: http://hdl.handle.net/10948/22027 , vital:29814
- Description: While the West African sub-region has progressed in its efforts to achieve sustainable development, more intensive efforts are needed to address its developmental constraints. Among these constraints, the fragmentation of the sub-continent into small and landlocked countries remain one of the structural challenges to be faced. For this reason, strengthening regional co-operation and economic integration is a significant part in the improvement of the region’s economic performance. Monetary integration, which involves the use of a common currency within the area, is part of the process of economic integration. This study reflects upon the difficulties experienced by countries within the Economic Community of West African States (ECOWAS) without a common currency to facilitate economic growth and development. The study adopted a descriptive methodology and embarked on a thorough analysis of recent and relevant secondary sources. This was done in order to determine the expected effects of a common currency in the community, as well as to evaluate the viability of a single currency in the area. The findings indicate that there are potential gains expected from the establishment of a common currency in the relevant community of countries. These gains are contingent upon the meeting of a number of preconditions. These conditions include, inter alia, the need for a multidimensional approach to regionalism, the sustainability of the fiscal policy framework in the region and a greater convergence of the ECOWAS economies.
- Full Text:
- Date Issued: 2018
- Authors: Djessou, Oze Marie Pascale
- Date: 2018
- Subjects: Economic Community of West African States , Africa, West -- Economic integration , Africa -- Economic conditions
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: http://hdl.handle.net/10948/22027 , vital:29814
- Description: While the West African sub-region has progressed in its efforts to achieve sustainable development, more intensive efforts are needed to address its developmental constraints. Among these constraints, the fragmentation of the sub-continent into small and landlocked countries remain one of the structural challenges to be faced. For this reason, strengthening regional co-operation and economic integration is a significant part in the improvement of the region’s economic performance. Monetary integration, which involves the use of a common currency within the area, is part of the process of economic integration. This study reflects upon the difficulties experienced by countries within the Economic Community of West African States (ECOWAS) without a common currency to facilitate economic growth and development. The study adopted a descriptive methodology and embarked on a thorough analysis of recent and relevant secondary sources. This was done in order to determine the expected effects of a common currency in the community, as well as to evaluate the viability of a single currency in the area. The findings indicate that there are potential gains expected from the establishment of a common currency in the relevant community of countries. These gains are contingent upon the meeting of a number of preconditions. These conditions include, inter alia, the need for a multidimensional approach to regionalism, the sustainability of the fiscal policy framework in the region and a greater convergence of the ECOWAS economies.
- Full Text:
- Date Issued: 2018
Critical success factors of a route-to-market strategy in the South African beverage industry
- Mackenzie, Robert Duncan Mcintyre
- Authors: Mackenzie, Robert Duncan Mcintyre
- Date: 2018
- Subjects: Delivery of goods -- South Africa -- Management , Beverage industry -- South Africa , Marketing -- South Africa -- Management , Sales management -- South Africa , Customer services -- South Africa -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/22552 , vital:30005
- Description: Effective distribution has become a big challenge in the Fast Moving Consumer Goods (FMCG) industry, especially beverage manufacturers. This study has covered an analysis of the varying Route-to-Market strategies for primary and secondary distributors, and this data was used to provide a foundation for formulating a beverage industry Route-to-Market model based on identified critical success factors. It offers insight into the implementation process in the varying markets, highlighting the importance of tailoring the Route-to-Market model to specific markets, and the importance of keeping the processes customer focused. The objective of this study was to identify the critical success factors of Route-to-Market in the beverage industry of South Africa, specifically investigating the financial viability of the selected distribution method, the knowledge and talent management of the employees and customers, the impact and effect of product availability, the level and importance of service excellence, and analysing the significance of strategic planning. This was followed by a qualitative explanatory case study methodology and research design, using multiple embedded units of analysis, in the form of semi-structured interviews and provided a valuable insight into success factors of Route-to-Market in the beverage industry of South Africa. The overall conclusion is that an effective Route-to-Market model, which has a well-established customer base at its centre, will significantly improve the satisfaction of customers in terms of quality and respect for services rendered. It is recommended that a company should review its Route-to-Market strategies regularly as to ensure the model is as relevant as possible.
- Full Text:
- Date Issued: 2018
- Authors: Mackenzie, Robert Duncan Mcintyre
- Date: 2018
- Subjects: Delivery of goods -- South Africa -- Management , Beverage industry -- South Africa , Marketing -- South Africa -- Management , Sales management -- South Africa , Customer services -- South Africa -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/22552 , vital:30005
- Description: Effective distribution has become a big challenge in the Fast Moving Consumer Goods (FMCG) industry, especially beverage manufacturers. This study has covered an analysis of the varying Route-to-Market strategies for primary and secondary distributors, and this data was used to provide a foundation for formulating a beverage industry Route-to-Market model based on identified critical success factors. It offers insight into the implementation process in the varying markets, highlighting the importance of tailoring the Route-to-Market model to specific markets, and the importance of keeping the processes customer focused. The objective of this study was to identify the critical success factors of Route-to-Market in the beverage industry of South Africa, specifically investigating the financial viability of the selected distribution method, the knowledge and talent management of the employees and customers, the impact and effect of product availability, the level and importance of service excellence, and analysing the significance of strategic planning. This was followed by a qualitative explanatory case study methodology and research design, using multiple embedded units of analysis, in the form of semi-structured interviews and provided a valuable insight into success factors of Route-to-Market in the beverage industry of South Africa. The overall conclusion is that an effective Route-to-Market model, which has a well-established customer base at its centre, will significantly improve the satisfaction of customers in terms of quality and respect for services rendered. It is recommended that a company should review its Route-to-Market strategies regularly as to ensure the model is as relevant as possible.
- Full Text:
- Date Issued: 2018
Computational analysis and cavity optimisation to achieve directional solidification in a cast aluminium alloy [Al7SiMg] component
- Authors: Nohanyaza, Melikhaya
- Date: 2018
- Subjects: Metal castings , Automobiles -- Materials , Alloys , Light metal alloys
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/22913 , vital:30141
- Description: The study at hand focussed on A356.0 industrial and high production die casting alloy. Since the birth of metal casting, numerous researchers have addressed the multiple phenomena that influence the casting quality and mechanical properties of castable alloys. This study harnessed research findings on A356.0 alloy and the aluminium family as a whole, to improve the casting soundness of the component already in the production process. The local foundry showed interest in understanding solidification and quality of A356.0 alloy fluxed with NaCl+KCl melt cleaning flux plus 4 of TiB2 5:1 master alloy grain refining rods and A356.0 alloy processed with KCl+Ti (presumably KCl+TiB2) grain refining flux plus 4 of TiB2 5:1 master alloy rods. Numerical analysis was used to define the progressive nature and directional solidification of the alloy using MAGMA5. MAGMA5.3 virtual optimisation capabilities were used for development of future component casting methods and procedures to solve macro- and microporosity evident on the casting. To find a direct link between the virtual and foundry environment, a preliminary study was conducted on a simple foundry stage of cone billet casting for both alloys with and without mould/casting interface coating. The findings indicated that A356.0 maintained its shrinkage volume percentage at mould temperatures above 300 °C, but progressively increased at temperatures below. Furthermore, thermal insulation coat (also used on Right Hand Side [RHS] mould of the foundry component) influenced the shrinkage distribution on the casting while localised at the centre on non-coated mould/casting interfaces for both KCl+Ti and NaCl+KCl melt fluxed A356.0 at similar percentage shrinkage for mould temperatures greater or equal to 300 °C. Near thin foundry castings for both flux treatments indicated similar mechanical properties at similar casting stages. The mechanical properties of both conditions seemed to degrade as a function of die casting period. Secondary dendrite arm spacing microstructure parameter for NaCl+KCl and KCl+Ti fluxed alloy averaged 40 μm and 35 μm respectively across all test zones. However, individual SDAS definitions per test zone indicated possible micro segregation on NaCl+KCl fluxed alloy and instantaneous solidification as a result of constitutional supercooling on alloys fluxed with KCl+Ti alloy. The growth rate solidification parameter was symmetrical about the centre of the component, where the centre of the component experienced an exponential drop from the top (away from the filling gate) to the bottom (near the filling gate) of the component. A virtual approach to tooling geometrical design indicated a weak influence on both micro- and macroporosity. However, the introduction of low thermal capacity, high heat transfer at Left Hand Side [LHS] tooling and a new cooling system arrangement indicated a higher influence in achieving sound casting. Knowledge gained in this study will improve local foundry competitiveness and introduce cost effective virtual approach foundry developments. The study will also introduce new methods for industrial research and position Nelson Mandela University as a leader in this field.
- Full Text:
- Date Issued: 2018
- Authors: Nohanyaza, Melikhaya
- Date: 2018
- Subjects: Metal castings , Automobiles -- Materials , Alloys , Light metal alloys
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/22913 , vital:30141
- Description: The study at hand focussed on A356.0 industrial and high production die casting alloy. Since the birth of metal casting, numerous researchers have addressed the multiple phenomena that influence the casting quality and mechanical properties of castable alloys. This study harnessed research findings on A356.0 alloy and the aluminium family as a whole, to improve the casting soundness of the component already in the production process. The local foundry showed interest in understanding solidification and quality of A356.0 alloy fluxed with NaCl+KCl melt cleaning flux plus 4 of TiB2 5:1 master alloy grain refining rods and A356.0 alloy processed with KCl+Ti (presumably KCl+TiB2) grain refining flux plus 4 of TiB2 5:1 master alloy rods. Numerical analysis was used to define the progressive nature and directional solidification of the alloy using MAGMA5. MAGMA5.3 virtual optimisation capabilities were used for development of future component casting methods and procedures to solve macro- and microporosity evident on the casting. To find a direct link between the virtual and foundry environment, a preliminary study was conducted on a simple foundry stage of cone billet casting for both alloys with and without mould/casting interface coating. The findings indicated that A356.0 maintained its shrinkage volume percentage at mould temperatures above 300 °C, but progressively increased at temperatures below. Furthermore, thermal insulation coat (also used on Right Hand Side [RHS] mould of the foundry component) influenced the shrinkage distribution on the casting while localised at the centre on non-coated mould/casting interfaces for both KCl+Ti and NaCl+KCl melt fluxed A356.0 at similar percentage shrinkage for mould temperatures greater or equal to 300 °C. Near thin foundry castings for both flux treatments indicated similar mechanical properties at similar casting stages. The mechanical properties of both conditions seemed to degrade as a function of die casting period. Secondary dendrite arm spacing microstructure parameter for NaCl+KCl and KCl+Ti fluxed alloy averaged 40 μm and 35 μm respectively across all test zones. However, individual SDAS definitions per test zone indicated possible micro segregation on NaCl+KCl fluxed alloy and instantaneous solidification as a result of constitutional supercooling on alloys fluxed with KCl+Ti alloy. The growth rate solidification parameter was symmetrical about the centre of the component, where the centre of the component experienced an exponential drop from the top (away from the filling gate) to the bottom (near the filling gate) of the component. A virtual approach to tooling geometrical design indicated a weak influence on both micro- and macroporosity. However, the introduction of low thermal capacity, high heat transfer at Left Hand Side [LHS] tooling and a new cooling system arrangement indicated a higher influence in achieving sound casting. Knowledge gained in this study will improve local foundry competitiveness and introduce cost effective virtual approach foundry developments. The study will also introduce new methods for industrial research and position Nelson Mandela University as a leader in this field.
- Full Text:
- Date Issued: 2018
The impact of macroeconomic factors on the South African equity market
- Authors: Mpuku, Cwayita
- Date: 2018
- Subjects: South Africa -- Economic conditions -- Econometric models , Capital market -- South Africa , Stock exchanges -- South Africa , Johannesburg Stock Exchange
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/32238 , vital:31990
- Description: The South African equity market is the largest equity market in Africa and plays an important role in the development of the South African economy. It is a relatively large source of finance for companies that want to invest in capital and expand their businesses. Firms that are listed on the Johannesburg Stock Exchange (JSE) are therefore privy to an additional source of capital funds in addition having access to the credit markets. The development of a country’s equity market gives an indication of the extent to which firms have access to long-term funds which are needed for investment in production of goods and services and the growth of the economy. Historical evidence shows that downturns in the equity markets can disrupt economic performance of countries. The 1929 global depression and the 2008 global recession are examples of economic disruptions that have origins in the equity markets (Mishkin, 2013:190). An understanding of the risk factors that drive an equity market is therefore beneficial to both individuals and institutions. Individuals and institutions participate in the equity market by buying and selling shares of companies that are listed on the JSE. About 40 per cent of shares on the JSE are held by institutional investors such as pension funds and unit trusts (Ambrosi, 2014). The equity market therefore has an impact on people’s savings and pension funds invested by intermediary institutions. Investors who participate in the equity market do so with the expectation of receiving returns on their investment, but such returns don’t come without risk.
- Full Text:
- Date Issued: 2018
- Authors: Mpuku, Cwayita
- Date: 2018
- Subjects: South Africa -- Economic conditions -- Econometric models , Capital market -- South Africa , Stock exchanges -- South Africa , Johannesburg Stock Exchange
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/32238 , vital:31990
- Description: The South African equity market is the largest equity market in Africa and plays an important role in the development of the South African economy. It is a relatively large source of finance for companies that want to invest in capital and expand their businesses. Firms that are listed on the Johannesburg Stock Exchange (JSE) are therefore privy to an additional source of capital funds in addition having access to the credit markets. The development of a country’s equity market gives an indication of the extent to which firms have access to long-term funds which are needed for investment in production of goods and services and the growth of the economy. Historical evidence shows that downturns in the equity markets can disrupt economic performance of countries. The 1929 global depression and the 2008 global recession are examples of economic disruptions that have origins in the equity markets (Mishkin, 2013:190). An understanding of the risk factors that drive an equity market is therefore beneficial to both individuals and institutions. Individuals and institutions participate in the equity market by buying and selling shares of companies that are listed on the JSE. About 40 per cent of shares on the JSE are held by institutional investors such as pension funds and unit trusts (Ambrosi, 2014). The equity market therefore has an impact on people’s savings and pension funds invested by intermediary institutions. Investors who participate in the equity market do so with the expectation of receiving returns on their investment, but such returns don’t come without risk.
- Full Text:
- Date Issued: 2018
The legal remedies to protect minors against cyberbullying in South Africa
- Authors: Hlazo, Nonhlanhla Irene
- Date: 2018
- Subjects: Cyberbullying -- South Africa , Child pornography -- Law and legislation -- South Africa , Child sexual abuse -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/30271 , vital:30914
- Description: The aim of this research is to investigate the constitutional, common law and legislative remedies available to protect the rights of minors against cyberbullying in South Africa and whether these laws are in line with the relevant international instruments. The study focuses on the protection of the rights of minors online as the most vulnerable group in society. The internet was not originally created to be used by minors, therefore, children are subject to more risks on the internet like cyberbullying. Cyberbullying results in the infringement of the rights to privacy, dignity and reputation among others. There are several remedies available in South African private law to protect the rights of minors. However, the rights of the victim must be balanced against the perpetrator’s right to freedom of expression, taking into consideration the best interests of both children. The remedies available are in line with some international instruments safeguarding human rights but there are a number of weaknesses in relation to the application of these remedies to instances of cyberbullying. For example, an interdict cannot be issued in instances where the cyberbully is anonymous. The current legislative framework, although also in line with relevant international instruments, is not going far enough to protect children against cyberbullying. In addition, the term “cyberbullying” is not specifically defined in any of the Acts, which may create challenges in the prosecution of the crime. Fortunately, there are a number of Bills in the pipeline that aim to address the gaps in the current law. Several provisions of the Bills also correlate with relevant international instruments. However, there is a need to revise the proposed Bills in order to sufficiently protect minors against cyberbulling. This study also proposes recommendations relating to some of the inadequacies of the law in this regard.
- Full Text:
- Date Issued: 2018
- Authors: Hlazo, Nonhlanhla Irene
- Date: 2018
- Subjects: Cyberbullying -- South Africa , Child pornography -- Law and legislation -- South Africa , Child sexual abuse -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/30271 , vital:30914
- Description: The aim of this research is to investigate the constitutional, common law and legislative remedies available to protect the rights of minors against cyberbullying in South Africa and whether these laws are in line with the relevant international instruments. The study focuses on the protection of the rights of minors online as the most vulnerable group in society. The internet was not originally created to be used by minors, therefore, children are subject to more risks on the internet like cyberbullying. Cyberbullying results in the infringement of the rights to privacy, dignity and reputation among others. There are several remedies available in South African private law to protect the rights of minors. However, the rights of the victim must be balanced against the perpetrator’s right to freedom of expression, taking into consideration the best interests of both children. The remedies available are in line with some international instruments safeguarding human rights but there are a number of weaknesses in relation to the application of these remedies to instances of cyberbullying. For example, an interdict cannot be issued in instances where the cyberbully is anonymous. The current legislative framework, although also in line with relevant international instruments, is not going far enough to protect children against cyberbullying. In addition, the term “cyberbullying” is not specifically defined in any of the Acts, which may create challenges in the prosecution of the crime. Fortunately, there are a number of Bills in the pipeline that aim to address the gaps in the current law. Several provisions of the Bills also correlate with relevant international instruments. However, there is a need to revise the proposed Bills in order to sufficiently protect minors against cyberbulling. This study also proposes recommendations relating to some of the inadequacies of the law in this regard.
- Full Text:
- Date Issued: 2018
Children in conflict with the law - constructions of their family environment
- Mtshutshwane, Anda Sweetgirl, Terblanche, Susan
- Authors: Mtshutshwane, Anda Sweetgirl , Terblanche, Susan
- Date: 2018
- Subjects: Juvenile delinquency -- South Africa -- Eastern Cape , Child development -- South Africa -- Eastern Cape , Problem children -- South Africa -- Eastern Cape , Children -- Legal status, laws, etc. -- South Africa -- Eastern Cape , Crime and age -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/32960 , vital:32480
- Description: The studies reviewed for this project indicate that there is an interplay of family and social factors that affect the development of the child. Furthermore, some studies postulate that there is a relationship between children’s engagement in criminal behaviour and their family environment. The present study aimed to explore, describe and interpret how children who have been in conflict with the law construct their family environment. A qualitative research approach that was embedded in an explorative, descriptive and contextual research design was employed in order to achieve the objectives of the study. The research population was constituted of children from a Child and Youth Care Centre. A non-probability purposive sampling technique was employed to select children aged 14 to 17 years who have been in conflict with the law. Individual semi-structured interviews were conducted with the selected children and this data was analyzed using Tesch’s thematic analysis. Ethical considerations that were applicable for the involvement of children and vulnerable groups in research were adhered to. The trustworthiness of the research process, and the findings of the study, were enhanced by employing a variety of data verification strategies. Data was verified using: member checking, peer debriefing, clarifying bias by the researcher, and dense description of the application of the selected methods used in research suggested by Creswell. The major findings of this study include: positive and negative experiences of children prior to involvement to crime in their internal family environment. The external family environment was dominated by gangsterism and crime in the community, police corruption and their interaction with drugs. Furthermore, the study findings revealed positive and negative school experiences and posited several reasons why children break the law. It is hoped that the research will contribute to the knowledge base of Social Work and Practice interventions in the field of child protection services in general and, more specifically, on the criminal justice system.
- Full Text:
- Date Issued: 2018
- Authors: Mtshutshwane, Anda Sweetgirl , Terblanche, Susan
- Date: 2018
- Subjects: Juvenile delinquency -- South Africa -- Eastern Cape , Child development -- South Africa -- Eastern Cape , Problem children -- South Africa -- Eastern Cape , Children -- Legal status, laws, etc. -- South Africa -- Eastern Cape , Crime and age -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/32960 , vital:32480
- Description: The studies reviewed for this project indicate that there is an interplay of family and social factors that affect the development of the child. Furthermore, some studies postulate that there is a relationship between children’s engagement in criminal behaviour and their family environment. The present study aimed to explore, describe and interpret how children who have been in conflict with the law construct their family environment. A qualitative research approach that was embedded in an explorative, descriptive and contextual research design was employed in order to achieve the objectives of the study. The research population was constituted of children from a Child and Youth Care Centre. A non-probability purposive sampling technique was employed to select children aged 14 to 17 years who have been in conflict with the law. Individual semi-structured interviews were conducted with the selected children and this data was analyzed using Tesch’s thematic analysis. Ethical considerations that were applicable for the involvement of children and vulnerable groups in research were adhered to. The trustworthiness of the research process, and the findings of the study, were enhanced by employing a variety of data verification strategies. Data was verified using: member checking, peer debriefing, clarifying bias by the researcher, and dense description of the application of the selected methods used in research suggested by Creswell. The major findings of this study include: positive and negative experiences of children prior to involvement to crime in their internal family environment. The external family environment was dominated by gangsterism and crime in the community, police corruption and their interaction with drugs. Furthermore, the study findings revealed positive and negative school experiences and posited several reasons why children break the law. It is hoped that the research will contribute to the knowledge base of Social Work and Practice interventions in the field of child protection services in general and, more specifically, on the criminal justice system.
- Full Text:
- Date Issued: 2018
Effects of elastic-band tension training on strength, speed, agility and vertical jump height in university soccer players
- Authors: Katushabe, Edgar
- Date: 2018
- Subjects: Basics of elastic resistance training , Elastic resistance training for stability, strength, and power , Isometric exercise , Soccer -- Training
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/30638 , vital:31001
- Description: Soccer is regarded as one of the most popular sports in the world, and involves explosive physical actions such as kicking, jumping, rapid changes of direction and sprinting. These attributes would suggest that strength, power, and agility may play an important role in soccer performance. Elastic band resistance training serves to increase strength, power, speed, balance, coordination and agility However, there is little published research available on the use and effectiveness of elastic-band resistance training as a tool for improvement in muscular strength and power of soccer players. Purpose: To determine the effect of elastic-band resistance training on strength, speed, agility and vertical jump height of university soccer players. The present study used a pre-test post-test experimental study design. The participants comprised of 15 Eastern Cape male soccer players, currently affiliated with the Nelson Mandela University soccer teams. Participants were randomly allocated into one of two groups: a conventional resistance training group, and an elastic band tension resistance training group. Stratified random sampling was used to ensure an even distribution of the performance levels and training experience between the participants. Analysis implemented used Microsoft Excel® and the latest version of Statistica for the purpose of descriptive and inferential statistics. Additionally, Pearson correlation coefficient and coefficient of determination were used to identify statistical correlations between variables of interest. Inferential statistics were applied using analysis of covariance (ANCOVA), and in the case of significant findings, the Scheffé post-hoc test was utilized for comparisons. Independent t-tests indicated significant between-group differences. The alpha level was set at 0.05. Results: The main findings were that elastic band resistance training would appear to be a superior method to conventional resistance training given that: This method was able to produce greater results in improving maximal vertical jump when compared to free weight resistance training (ANCOVA, F(1,25)=9.1135, p=0.00577), produced faster 40m iv sprint times in comparison to free weight resistance training (ANCOVA, F(1, 25)=4.534, p=0.043), and produced significant improvements in one repetition maximum performance in the squat (ANCOVA, F(1, 25)=5.454, p=0.028). Based on the results of this study, it would appear that both the elastic band resistance training and free weight resistance training were effective in increasing performance in both the one repetition maximum deadlift and agility tests, with no significant difference between the two methods (ANCOVA, F(1, 25) =0.328, p=0.572), ANCOVA, F(1, 25)=3.597, p=0.069 respectively). Elastic band resistance training may be an effective alternative training methodology to improve performance variables in university soccer players. However, further research may be needed to clearly define the role of combined elastic band resistance training in the periodization of soccer training in a competitive season.
- Full Text:
- Date Issued: 2018
- Authors: Katushabe, Edgar
- Date: 2018
- Subjects: Basics of elastic resistance training , Elastic resistance training for stability, strength, and power , Isometric exercise , Soccer -- Training
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/30638 , vital:31001
- Description: Soccer is regarded as one of the most popular sports in the world, and involves explosive physical actions such as kicking, jumping, rapid changes of direction and sprinting. These attributes would suggest that strength, power, and agility may play an important role in soccer performance. Elastic band resistance training serves to increase strength, power, speed, balance, coordination and agility However, there is little published research available on the use and effectiveness of elastic-band resistance training as a tool for improvement in muscular strength and power of soccer players. Purpose: To determine the effect of elastic-band resistance training on strength, speed, agility and vertical jump height of university soccer players. The present study used a pre-test post-test experimental study design. The participants comprised of 15 Eastern Cape male soccer players, currently affiliated with the Nelson Mandela University soccer teams. Participants were randomly allocated into one of two groups: a conventional resistance training group, and an elastic band tension resistance training group. Stratified random sampling was used to ensure an even distribution of the performance levels and training experience between the participants. Analysis implemented used Microsoft Excel® and the latest version of Statistica for the purpose of descriptive and inferential statistics. Additionally, Pearson correlation coefficient and coefficient of determination were used to identify statistical correlations between variables of interest. Inferential statistics were applied using analysis of covariance (ANCOVA), and in the case of significant findings, the Scheffé post-hoc test was utilized for comparisons. Independent t-tests indicated significant between-group differences. The alpha level was set at 0.05. Results: The main findings were that elastic band resistance training would appear to be a superior method to conventional resistance training given that: This method was able to produce greater results in improving maximal vertical jump when compared to free weight resistance training (ANCOVA, F(1,25)=9.1135, p=0.00577), produced faster 40m iv sprint times in comparison to free weight resistance training (ANCOVA, F(1, 25)=4.534, p=0.043), and produced significant improvements in one repetition maximum performance in the squat (ANCOVA, F(1, 25)=5.454, p=0.028). Based on the results of this study, it would appear that both the elastic band resistance training and free weight resistance training were effective in increasing performance in both the one repetition maximum deadlift and agility tests, with no significant difference between the two methods (ANCOVA, F(1, 25) =0.328, p=0.572), ANCOVA, F(1, 25)=3.597, p=0.069 respectively). Elastic band resistance training may be an effective alternative training methodology to improve performance variables in university soccer players. However, further research may be needed to clearly define the role of combined elastic band resistance training in the periodization of soccer training in a competitive season.
- Full Text:
- Date Issued: 2018
The extraction, quantification and application of high-value biological compounds from olive oil processing waste
- Authors: Postma-Botha, Marthie
- Date: 2018
- Subjects: Organic compounds , Biochemistry , Biomass energy , Olive oil industry
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/34383 , vital:33371
- Description: Olive oil processing waste (pomace) as a by-product of the olive oil industry is regarded as a rich source of high-value biological compounds exhibiting antioxidant potential. The objective of the present work was to obtain a concentrated extract of high-value biological antioxidants from the pomace. The effect of extraction conditions on the concentration of the bioactive compounds in the extracts was investigated. The simultaneous recovery of both hydrophilic and lipophilic high-value biological compounds exhibiting antioxidant potential was achieved through a one-step extraction method under reduced pressure using a non-toxic solvent blend. A multilevel experimental design was implemented with the aim of optimising the recovery of selected compounds, namely, hydroxytyrosol, tyrosol, oleuropein, α-tocopherol and squalene from olive pomace by using solvent blends of n-heptane, d-limonene, ethanol and water. The factors considered were: extraction time, percentage composition of solvent blends and extraction temperature. The results suggested that a good recovery of the hydrophilic polyphenolic compounds, namely, hydroxytyrosol, tyrosol and oleuropein, as well as the lipophilic compounds, α-tocopherol and squalene may be achieved at a solvent temperature of 60°C at 400 mbar with a solvent blend of 30% n-heptane, 50% ethanol and 20% water and an extraction time of two hours. It was found that freeze-drying the pomace before extraction minimised production of artefacts, avoided degradation of biophenols, ensured long term stability of a reproducible sample and achieved better recovery of important hydrophilic and lipophilic bioactive compounds. Since the bioactive compounds are temperature sensitive, the extraction was performed under reduced pressure in order to reduce solvent reflux temperature and to improve extraction efficiency. The quantitative and qualitative determinations of the aforementioned high-value compounds were performed by high-performance liquid chromatography (HPLC), which revealed that the hydrophilic polyphenolic as well as the lipophilic α-tocopherol and squalene were present. In this study hydroxytyrosol, tyrosol, oleuropein, α-tocopherol and squalene were extracted from the pomace of two olive cultivars (Frantoio and Coratina). A comparison among the two cultivars showed quantitative differences between the two cultivars in all five high-value biological compounds and in the antioxidant capacity of the extracts evaluated by measuring the radical scavenging effect on 1,1-diphenyl-2- picrylhydrazyl (DPPH) free radical. Coratina cultivar was found to have a significantly higher antioxidant capacity than Frantoio due to the much greater oleuropein content in the Coratina compared to the Frantoio although Frantoio had a significantly greater amount of hydroxytyrosol. The stability of olive waste extracts stored at four temperatures was also investigated and the results show that increased temperatures caused greater extent of degradation of both the hydrophilic polyphenolic and lipophilic compounds. The proposed optimum storage condition for the olive pomace extracts was found to be at 5°C in the absence of light. The extracts were incorporated into two cosmetic formulations and were found, from a stability study, to be stable at room temperature and optimally stable at 5°C in the absence of light.
- Full Text:
- Date Issued: 2018
- Authors: Postma-Botha, Marthie
- Date: 2018
- Subjects: Organic compounds , Biochemistry , Biomass energy , Olive oil industry
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/34383 , vital:33371
- Description: Olive oil processing waste (pomace) as a by-product of the olive oil industry is regarded as a rich source of high-value biological compounds exhibiting antioxidant potential. The objective of the present work was to obtain a concentrated extract of high-value biological antioxidants from the pomace. The effect of extraction conditions on the concentration of the bioactive compounds in the extracts was investigated. The simultaneous recovery of both hydrophilic and lipophilic high-value biological compounds exhibiting antioxidant potential was achieved through a one-step extraction method under reduced pressure using a non-toxic solvent blend. A multilevel experimental design was implemented with the aim of optimising the recovery of selected compounds, namely, hydroxytyrosol, tyrosol, oleuropein, α-tocopherol and squalene from olive pomace by using solvent blends of n-heptane, d-limonene, ethanol and water. The factors considered were: extraction time, percentage composition of solvent blends and extraction temperature. The results suggested that a good recovery of the hydrophilic polyphenolic compounds, namely, hydroxytyrosol, tyrosol and oleuropein, as well as the lipophilic compounds, α-tocopherol and squalene may be achieved at a solvent temperature of 60°C at 400 mbar with a solvent blend of 30% n-heptane, 50% ethanol and 20% water and an extraction time of two hours. It was found that freeze-drying the pomace before extraction minimised production of artefacts, avoided degradation of biophenols, ensured long term stability of a reproducible sample and achieved better recovery of important hydrophilic and lipophilic bioactive compounds. Since the bioactive compounds are temperature sensitive, the extraction was performed under reduced pressure in order to reduce solvent reflux temperature and to improve extraction efficiency. The quantitative and qualitative determinations of the aforementioned high-value compounds were performed by high-performance liquid chromatography (HPLC), which revealed that the hydrophilic polyphenolic as well as the lipophilic α-tocopherol and squalene were present. In this study hydroxytyrosol, tyrosol, oleuropein, α-tocopherol and squalene were extracted from the pomace of two olive cultivars (Frantoio and Coratina). A comparison among the two cultivars showed quantitative differences between the two cultivars in all five high-value biological compounds and in the antioxidant capacity of the extracts evaluated by measuring the radical scavenging effect on 1,1-diphenyl-2- picrylhydrazyl (DPPH) free radical. Coratina cultivar was found to have a significantly higher antioxidant capacity than Frantoio due to the much greater oleuropein content in the Coratina compared to the Frantoio although Frantoio had a significantly greater amount of hydroxytyrosol. The stability of olive waste extracts stored at four temperatures was also investigated and the results show that increased temperatures caused greater extent of degradation of both the hydrophilic polyphenolic and lipophilic compounds. The proposed optimum storage condition for the olive pomace extracts was found to be at 5°C in the absence of light. The extracts were incorporated into two cosmetic formulations and were found, from a stability study, to be stable at room temperature and optimally stable at 5°C in the absence of light.
- Full Text:
- Date Issued: 2018
Factors that influence the throughput of engineering students at Nelson Mandela University
- Authors: Joubert, Petrus Jacobus
- Date: 2018
- Subjects: Education, Higher -- South Africa , Universities and colleges -- South Africa -- Eastern Cape , Academic achievement -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/30496 , vital:30953
- Description: The current throughput rate of engineering students is an enormous concern, especially in light of the current financial pressure on universities and the goal for the education sector in the National Development Plan 2030, which is to increase annual enrolment levels at universities from 950 000 in 2010 to 1,6 million by 2030 (National Planning Commission, 2011). The low throughput rate of engineering students makes engineering qualifications unsustainable. In a scarce skills list, which highlights the importance of the problem that South Africa is facing, five engineering disciplines are in the top 10 scarce skills in South Africa (Scarce skills, 2016) and, therefore, this study only focuses on engineering students’ throughput rate. Regarding the future enrolment goal for 2030, it is important for universities to understand the factors that influence the throughput rate of engineering students, which the universities have control over. This will put the universities in a position to implement interventions to change negative influences on the throughput rate of engineering students into positive ones. This study consists of a literature review, firstly focusing on the factors influencing the student throughput rate internationally. The literature review then focuses on South African factors and lastly discusses three main categories, namely student engagement, the use of technology and the academic environment. The eight variables that are under study are grouped into these three main categories. The primary data, which were collected through the use of a questionnaire in order to have a good understanding of the factors influencing the throughput rate, were reported and analysed. The results of this study revealed the factors that influenced the throughput rate most positively and negatively.
- Full Text:
- Date Issued: 2018
- Authors: Joubert, Petrus Jacobus
- Date: 2018
- Subjects: Education, Higher -- South Africa , Universities and colleges -- South Africa -- Eastern Cape , Academic achievement -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/30496 , vital:30953
- Description: The current throughput rate of engineering students is an enormous concern, especially in light of the current financial pressure on universities and the goal for the education sector in the National Development Plan 2030, which is to increase annual enrolment levels at universities from 950 000 in 2010 to 1,6 million by 2030 (National Planning Commission, 2011). The low throughput rate of engineering students makes engineering qualifications unsustainable. In a scarce skills list, which highlights the importance of the problem that South Africa is facing, five engineering disciplines are in the top 10 scarce skills in South Africa (Scarce skills, 2016) and, therefore, this study only focuses on engineering students’ throughput rate. Regarding the future enrolment goal for 2030, it is important for universities to understand the factors that influence the throughput rate of engineering students, which the universities have control over. This will put the universities in a position to implement interventions to change negative influences on the throughput rate of engineering students into positive ones. This study consists of a literature review, firstly focusing on the factors influencing the student throughput rate internationally. The literature review then focuses on South African factors and lastly discusses three main categories, namely student engagement, the use of technology and the academic environment. The eight variables that are under study are grouped into these three main categories. The primary data, which were collected through the use of a questionnaire in order to have a good understanding of the factors influencing the throughput rate, were reported and analysed. The results of this study revealed the factors that influenced the throughput rate most positively and negatively.
- Full Text:
- Date Issued: 2018