The importance of a donor management framework on the sustainability of non-profit organisations in Nelson Mandela Bay
- Authors: Van Boomen, Clinton
- Date: 2019
- Subjects: Nonprofit organizations -- Management , Nonprofit organizations -- Finance -- Management Nonprofit organizations -- South Africa -- Nelson Mandela Bay Municipality
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/43676 , vital:37029
- Description: Fundraising and income generation to service operational expenses play a significant role in ensuring the sustainability of non-profit organisations. Literature maintains that in order for non-profit organisations to remain sustainable, designing campaigns and strategies with stakeholder needs in mind is crucial. The study aims at improving donor relations by determining the role donor management systems play in the strategic objectives of non-profit organisations, and whether non-profits adopt strategic approaches to create and maintain relationships with donors. The research also attempted to understand the importance of managing relationships with donors. According to the framework of Determinants of Philanthropy formulated by Bekkers and Wiepking, the researcher utilised the eight key mechanisms as a framework to answer the research question. In the study, simple probability sampling was used to identify non-profit organisations within Nelson Mandela Bay. Data from anonymous participants were collected using a self-completion questionnaire using the determinants of philanthropy framework themes to link responses to the research question and literature. While the study returned a low response rate, the main finding of the research was that non-profit organisations spent more time servicing relationships with existing donors, instead of creating relationships with new potential donors. In the event that a major long-term donor stopped donating, this left the non-profit with a significant predicament of sourcing a new donor, which could be time consuming at best. A possible solution to this issue is to create a strategic relationship management framework which identifies each new and existing donor’s attributes, thereby linking it to the correct campaigns at the right time. The anticipated outcome of this solution is to ensure that there is a consistent supply of donors which will ensure sustainability for the non-profit organisation.
- Full Text:
- Date Issued: 2019
- Authors: Van Boomen, Clinton
- Date: 2019
- Subjects: Nonprofit organizations -- Management , Nonprofit organizations -- Finance -- Management Nonprofit organizations -- South Africa -- Nelson Mandela Bay Municipality
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/43676 , vital:37029
- Description: Fundraising and income generation to service operational expenses play a significant role in ensuring the sustainability of non-profit organisations. Literature maintains that in order for non-profit organisations to remain sustainable, designing campaigns and strategies with stakeholder needs in mind is crucial. The study aims at improving donor relations by determining the role donor management systems play in the strategic objectives of non-profit organisations, and whether non-profits adopt strategic approaches to create and maintain relationships with donors. The research also attempted to understand the importance of managing relationships with donors. According to the framework of Determinants of Philanthropy formulated by Bekkers and Wiepking, the researcher utilised the eight key mechanisms as a framework to answer the research question. In the study, simple probability sampling was used to identify non-profit organisations within Nelson Mandela Bay. Data from anonymous participants were collected using a self-completion questionnaire using the determinants of philanthropy framework themes to link responses to the research question and literature. While the study returned a low response rate, the main finding of the research was that non-profit organisations spent more time servicing relationships with existing donors, instead of creating relationships with new potential donors. In the event that a major long-term donor stopped donating, this left the non-profit with a significant predicament of sourcing a new donor, which could be time consuming at best. A possible solution to this issue is to create a strategic relationship management framework which identifies each new and existing donor’s attributes, thereby linking it to the correct campaigns at the right time. The anticipated outcome of this solution is to ensure that there is a consistent supply of donors which will ensure sustainability for the non-profit organisation.
- Full Text:
- Date Issued: 2019
The legal consequences of unprotected strikes
- Authors: Van Blerk, Caro
- Date: 2019
- Subjects: Strikes and lockouts -- Law and legislation -- South Africa , Strikes and lockouts -- South Africa Strikes and lockouts Labor laws and legislation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/43688 , vital:37030
- Description: The purpose of a strike is to ensure that the employer‘s business remains at a standstill until the demands of workers are met1.Workers have tried to increase the effect that strikes would have on the employer, as to obtaining their demands, through resorting to violence, violating property of employer and other people. Our collective bargaining system could be seen as contributing to low wages, and thelack of a balloting requirement. The Labour Relations Act (LRA)2 gives effect to the right to strikes and the circumstances under which it might lose its protected status3. There are certain requirements that need to be met to ensure strikes are protected and once they are not adhered to, there are detrimental consequences. This leads to the high levels of violent unprotected strike action in the country, which has a negative impact on our social and economic abilities as a country. This study investigates the different areas, and analyses all factors associated with unprotected strikes.
- Full Text:
- Date Issued: 2019
- Authors: Van Blerk, Caro
- Date: 2019
- Subjects: Strikes and lockouts -- Law and legislation -- South Africa , Strikes and lockouts -- South Africa Strikes and lockouts Labor laws and legislation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/43688 , vital:37030
- Description: The purpose of a strike is to ensure that the employer‘s business remains at a standstill until the demands of workers are met1.Workers have tried to increase the effect that strikes would have on the employer, as to obtaining their demands, through resorting to violence, violating property of employer and other people. Our collective bargaining system could be seen as contributing to low wages, and thelack of a balloting requirement. The Labour Relations Act (LRA)2 gives effect to the right to strikes and the circumstances under which it might lose its protected status3. There are certain requirements that need to be met to ensure strikes are protected and once they are not adhered to, there are detrimental consequences. This leads to the high levels of violent unprotected strike action in the country, which has a negative impact on our social and economic abilities as a country. This study investigates the different areas, and analyses all factors associated with unprotected strikes.
- Full Text:
- Date Issued: 2019
Resistance: revealing and exposing the constructions of societal control
- Authors: Vaghmaria, Nishil Rishik
- Date: 2019
- Subjects: Art, Modern -- 21st century -- Research , Aesthetics Artists -- South Africa -- Exhibitions
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/43710 , vital:37035
- Description: This practice based visual arts investigation was triggered by the researcher’s social understandings and personal concern about societal control on the individual, and his resistance to the negative effects of consumerism and capitalism. Through this research project he aims to reveal and expose the workings of those systems of control visually. He pays particular attention to our current global, cultural and socio-political, economic order and the limitations that are imposed on the individual in terms of freedom of choice and expression, and through both the written work and the practical work he aims to influence a revolution of the mind and to encourage critical consciousness and awareness on the part of its audience regarding how individuals are manipulated, distracted and seduced into conformity. As an outcome of his research, and of his intention to act as an agent for socially aware creative practice, he presents a tentative framework for the use of emerging, socially conscious artists and educators. The practical component of this study is focused around the creation and display of graffiti-influenced images in both public and gallery spaces. The researcher makes extensive use of the SI’s subversive artistic technique of Détournement as he engages with the notion of ‘distraction’. This project, with its dual focus on text and on the creation of artworks in both public and gallery spaces, is intended as a contribution to the search for new critical understandings and diagnostic terminologies around social control.
- Full Text:
- Date Issued: 2019
- Authors: Vaghmaria, Nishil Rishik
- Date: 2019
- Subjects: Art, Modern -- 21st century -- Research , Aesthetics Artists -- South Africa -- Exhibitions
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/43710 , vital:37035
- Description: This practice based visual arts investigation was triggered by the researcher’s social understandings and personal concern about societal control on the individual, and his resistance to the negative effects of consumerism and capitalism. Through this research project he aims to reveal and expose the workings of those systems of control visually. He pays particular attention to our current global, cultural and socio-political, economic order and the limitations that are imposed on the individual in terms of freedom of choice and expression, and through both the written work and the practical work he aims to influence a revolution of the mind and to encourage critical consciousness and awareness on the part of its audience regarding how individuals are manipulated, distracted and seduced into conformity. As an outcome of his research, and of his intention to act as an agent for socially aware creative practice, he presents a tentative framework for the use of emerging, socially conscious artists and educators. The practical component of this study is focused around the creation and display of graffiti-influenced images in both public and gallery spaces. The researcher makes extensive use of the SI’s subversive artistic technique of Détournement as he engages with the notion of ‘distraction’. This project, with its dual focus on text and on the creation of artworks in both public and gallery spaces, is intended as a contribution to the search for new critical understandings and diagnostic terminologies around social control.
- Full Text:
- Date Issued: 2019
Modelling storm-time TEC changes using linear and non-linear techniques
- Authors: Uwamahoro, Jean Claude
- Date: 2019
- Subjects: Magnetic storms , Astronomy -- Computer programs , Imaging systems in astronomy , Ionospheric storms , Electrons -- Measurement , Magnetosphere -- Observations
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/92908 , vital:30762
- Description: Statistical models based on empirical orthogonal functions (EOF) analysis and non-linear regression analysis (NLRA) were developed for the purpose of estimating the ionospheric total electron content (TEC) during geomagnetic storms. The well-known least squares method (LSM) and Metropolis-Hastings algorithm (MHA) were used as optimization techniques to determine the unknown coefficients of the developed analytical expressions. Artificial Neural Networks (ANNs), the International Reference Ionosphere (IRI) model, and the Multi-Instrument Data Analysis System (MIDAS) tomographic inversion algorithm were also applied to storm-time TEC modelling/reconstruction for various latitudes of the African sector and surrounding areas. This work presents some of the first statistical modeling of the mid-latitude and low-latitude ionosphere during geomagnetic storms that includes solar, geomagnetic and neutral wind drivers.Development and validation of the empirical models were based on storm-time TEC data derived from the global positioning system (GPS) measurements over ground receivers within Africa and surrounding areas. The storm criterion applied was Dst 6 −50 nT and/or Kp > 4. The performance evaluation of MIDAS compared with ANNs to reconstruct storm-time TEC over the African low- and mid-latitude regions showed that MIDAS and ANNs provide comparable results. Their respective mean absolute error (MAE) values were 4.81 and 4.18 TECU. The ANN model was, however, found to perform 24.37 % better than MIDAS at estimating storm-time TEC for low latitudes, while MIDAS is 13.44 % more accurate than ANN for the mid-latitudes. When their performances are compared with the IRI model, both MIDAS and ANN model were found to provide more accurate storm-time TEC reconstructions for the African low- and mid-latitude regions. A comparative study of the performances of EOF, NLRA, ANN, and IRI models to estimate TEC during geomagnetic storm conditions over various latitudes showed that the ANN model is about 10 %, 26 %, and 58 % more accurate than EOF, NLRA, and IRI models, respectively, while EOF was found to perform 15 %, and 44 % better than NLRA and IRI, respectively. It was further found that the NLRA model is 25 % more accurate than the IRI model. We have also investigated for the first time, the role of meridional neutral winds (from the Horizontal Wind Model) to storm-time TEC modelling in the low latitude, northern and southern hemisphere mid-latitude regions of the African sector, based on ANN models. Statistics have shown that the inclusion of the meridional wind velocity in TEC modelling during geomagnetic storms leads to percentage improvements of about 5 % for the low latitude, 10 % and 5 % for the northern and southern hemisphere mid-latitude regions, respectively. High-latitude storm-induced winds and the inter-hemispheric blows of the meridional winds from summer to winter hemisphere have been suggested to be associated with these improvements.
- Full Text:
- Date Issued: 2019
- Authors: Uwamahoro, Jean Claude
- Date: 2019
- Subjects: Magnetic storms , Astronomy -- Computer programs , Imaging systems in astronomy , Ionospheric storms , Electrons -- Measurement , Magnetosphere -- Observations
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/92908 , vital:30762
- Description: Statistical models based on empirical orthogonal functions (EOF) analysis and non-linear regression analysis (NLRA) were developed for the purpose of estimating the ionospheric total electron content (TEC) during geomagnetic storms. The well-known least squares method (LSM) and Metropolis-Hastings algorithm (MHA) were used as optimization techniques to determine the unknown coefficients of the developed analytical expressions. Artificial Neural Networks (ANNs), the International Reference Ionosphere (IRI) model, and the Multi-Instrument Data Analysis System (MIDAS) tomographic inversion algorithm were also applied to storm-time TEC modelling/reconstruction for various latitudes of the African sector and surrounding areas. This work presents some of the first statistical modeling of the mid-latitude and low-latitude ionosphere during geomagnetic storms that includes solar, geomagnetic and neutral wind drivers.Development and validation of the empirical models were based on storm-time TEC data derived from the global positioning system (GPS) measurements over ground receivers within Africa and surrounding areas. The storm criterion applied was Dst 6 −50 nT and/or Kp > 4. The performance evaluation of MIDAS compared with ANNs to reconstruct storm-time TEC over the African low- and mid-latitude regions showed that MIDAS and ANNs provide comparable results. Their respective mean absolute error (MAE) values were 4.81 and 4.18 TECU. The ANN model was, however, found to perform 24.37 % better than MIDAS at estimating storm-time TEC for low latitudes, while MIDAS is 13.44 % more accurate than ANN for the mid-latitudes. When their performances are compared with the IRI model, both MIDAS and ANN model were found to provide more accurate storm-time TEC reconstructions for the African low- and mid-latitude regions. A comparative study of the performances of EOF, NLRA, ANN, and IRI models to estimate TEC during geomagnetic storm conditions over various latitudes showed that the ANN model is about 10 %, 26 %, and 58 % more accurate than EOF, NLRA, and IRI models, respectively, while EOF was found to perform 15 %, and 44 % better than NLRA and IRI, respectively. It was further found that the NLRA model is 25 % more accurate than the IRI model. We have also investigated for the first time, the role of meridional neutral winds (from the Horizontal Wind Model) to storm-time TEC modelling in the low latitude, northern and southern hemisphere mid-latitude regions of the African sector, based on ANN models. Statistics have shown that the inclusion of the meridional wind velocity in TEC modelling during geomagnetic storms leads to percentage improvements of about 5 % for the low latitude, 10 % and 5 % for the northern and southern hemisphere mid-latitude regions, respectively. High-latitude storm-induced winds and the inter-hemispheric blows of the meridional winds from summer to winter hemisphere have been suggested to be associated with these improvements.
- Full Text:
- Date Issued: 2019
Oral narratives as intertexts in selected Nigerian films
- Authors: Usman, Joshua
- Date: 2019
- Subjects: Folk literature -- Nigeria , Oral tradition -- Nigeria Motion pictures -- Nigeria
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/43721 , vital:37038
- Description: This research into the interface between orality and Nigerian film builds on previous scholarly works in the field (Ladebo (1992), Onabajo and M’Bayo (2009), Omolola (2013), Ezeigbo (2013), Mgbemere (2015) and Onzuike (2016)). Evident from these studies is the prevalence of recurring patterns of oral narratives in Nigerian film. The aim of this study is to consider the following research questions: Do film producers/directors adopt the use of oral narratives in Nigerian film texts? How do oral narratives translate into films? What is the rate of recurrence of oral narratives in Nigerian films? Do oral narratives aesthetically influence the quality of Nigerian films? For the purpose of this study a selection of nine Nigerian films (three each from the Yoruba, Hausa and Igbo groups). These films are analysed as primary texts to show the occurrence of elements of orature and oral narratives. Underpinning such analysis is the theory of intertextuality as coined by the French linguist Julia Kristeva. Kristeva sees the text as “intertextuality […] within the text of society and history” (Kristeva, 1980: 37). This approach is augmented by the views of Greenblatt on New Historicism, which implies literature should be studied and interpreted within the context of the history of the author and cultural/social context. The nine films under discussion are considered within their cultural/social context.
- Full Text:
- Date Issued: 2019
- Authors: Usman, Joshua
- Date: 2019
- Subjects: Folk literature -- Nigeria , Oral tradition -- Nigeria Motion pictures -- Nigeria
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/43721 , vital:37038
- Description: This research into the interface between orality and Nigerian film builds on previous scholarly works in the field (Ladebo (1992), Onabajo and M’Bayo (2009), Omolola (2013), Ezeigbo (2013), Mgbemere (2015) and Onzuike (2016)). Evident from these studies is the prevalence of recurring patterns of oral narratives in Nigerian film. The aim of this study is to consider the following research questions: Do film producers/directors adopt the use of oral narratives in Nigerian film texts? How do oral narratives translate into films? What is the rate of recurrence of oral narratives in Nigerian films? Do oral narratives aesthetically influence the quality of Nigerian films? For the purpose of this study a selection of nine Nigerian films (three each from the Yoruba, Hausa and Igbo groups). These films are analysed as primary texts to show the occurrence of elements of orature and oral narratives. Underpinning such analysis is the theory of intertextuality as coined by the French linguist Julia Kristeva. Kristeva sees the text as “intertextuality […] within the text of society and history” (Kristeva, 1980: 37). This approach is augmented by the views of Greenblatt on New Historicism, which implies literature should be studied and interpreted within the context of the history of the author and cultural/social context. The nine films under discussion are considered within their cultural/social context.
- Full Text:
- Date Issued: 2019
Mineralogical, geochemical and lead isotopic analysis of the lead mineralization of the Skorpion Deposit, south western Namibia
- Authors: Uazeua, Kakunauua
- Date: 2019
- Subjects: Zinc ores -- Namibia , Formations (Geology) -- Namibia , Mineralogy -- Namibia , Lead -- Metallurgy -- Namibia , Lead -- Isotopes -- Namibia
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/68391 , vital:29250
- Description: The Skorpion none-sulphide Zinc Deposit is located in the para-autochtonous Port Nolloth Zone of the Gariep Belt, which overlays the Lower-Proterozoic Orange River Group basement rocks (Corrans et al., 1993). Situated in close proximity to the larger Rosh Pinah Zn-Pb deposit, the Skorpion Deposit contained a resource of 24.6 Mt at 10.6 % Zn and unquantified Cu and Pb prior to mining. To date, zinc has been the only metal exploited, with minor amounts of copper as a by-product. This study aims at understanding the mineralogical composition of the Skorpion lead mineralization and understanding the relationship between lead and the major metals such as zinc and copper in order to form a basis for further work that could determine the potential of processing lead as a by-product. As part of the study, work was also done on lead isotopes mainly with the aim of understanding the mineralization genesis and to determine the differences between the Skorpion and Rosh Pinah deposit which rationalize the inferior economic potential of the Skorpion lead mineralization. Results of the study have shown that majority of the lead mineralization is hosted by the felsic metavolcanics as galena and subordinately in the metasiliciclastics as pyromorphite, a lead manganese phosphate. In terms of the mineral textures, the lead minerals appear to be mainly secondary phases that have been remobilized and reprecipitated around pyrite, within pyrite cracks and intergrown with minerals such as chalcocite and greenockite. Lead has been mainly concentrated along fault zones. The elevated pyromorphite concentrations tend to occur within gossanous zones in close association with iron and manganese oxides. These textures represent supergene enrichment of a sulphide proto ore. However, contrary to copper and zinc mineralization, lead was not remobilized far from the proto ore merely as a function of its poor mobility in acidic fluids (Reddy et al., 1995). This substantiates the concentration of secondary lead in the felsic metavolcanics and to a much lesser extent, in the metasiliciclastics. Both secondary zinc and copper were reprecipitated in the metasiliciclastics, further away from the sulphide proto ore, hosted mainly by the felsic metavolcanics. The average lead isotope ratios of 206Pb/204Pb (17.26), 207Pb/204Pb (15.60) and 208Pb/204Pb (37.42) resemble results provided by Frimmel (2004) for both the Skorpion and Rosh Pinah deposits. For the Skorpion samples from Frimmel (2004) had the following average ratios: 206Pb/204Pb (17.29), 207Pb/204Pb (15.59) and 208Pb/204Pb (37.51). The Rosh Pinah samples had the following average ratios: 206Pb/204Pb (17.17), 207Pb/204Pb (15.61) and 208Pb/204Pb (37.45). These results indicate lead derivation from the lower 2.0 Ga Eburnean pre-Gariep basement in agreement with and Frimmel et al. (2004). The host felsic metavolcanics might have been derived from melting of the basement rocks during the formation of the Adamastor Ocean. In comparison to the Rosh Pinah deposit lead isotope signatures, the Skorpion lead isotopes overlap with the Rosh Pinah deposit isotopes, but have a much narrower range. This is an indication of a much shorter lived and potentially faster mineralization event contrary to the SEDEX type Rosh Pinah deposit. The smaller tonnage of the Skorpion deposit, its inferior lead concentrations and the elevated radiogenic lead isotopes point toward a VMS deposit which was formed in a small graben fed by shallow conduits during a short lived mineralization event. Sedimentary rocks covered the forming deposit at a fast rate and impaired the deposit advancement. The interaction between the upper crustal rocks and the mineralizing fluids is what may have resulted in the elevated radiogenic lead signature. In contrast to this, SEDEX deposits such as the Rosh Pinah Deposit, are generally fed by deep seated conduits that allow more longer lived leaching of metals from the underlying basement rocks and generally allow minor influence from upper crustal rocks.
- Full Text:
- Date Issued: 2019
- Authors: Uazeua, Kakunauua
- Date: 2019
- Subjects: Zinc ores -- Namibia , Formations (Geology) -- Namibia , Mineralogy -- Namibia , Lead -- Metallurgy -- Namibia , Lead -- Isotopes -- Namibia
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/68391 , vital:29250
- Description: The Skorpion none-sulphide Zinc Deposit is located in the para-autochtonous Port Nolloth Zone of the Gariep Belt, which overlays the Lower-Proterozoic Orange River Group basement rocks (Corrans et al., 1993). Situated in close proximity to the larger Rosh Pinah Zn-Pb deposit, the Skorpion Deposit contained a resource of 24.6 Mt at 10.6 % Zn and unquantified Cu and Pb prior to mining. To date, zinc has been the only metal exploited, with minor amounts of copper as a by-product. This study aims at understanding the mineralogical composition of the Skorpion lead mineralization and understanding the relationship between lead and the major metals such as zinc and copper in order to form a basis for further work that could determine the potential of processing lead as a by-product. As part of the study, work was also done on lead isotopes mainly with the aim of understanding the mineralization genesis and to determine the differences between the Skorpion and Rosh Pinah deposit which rationalize the inferior economic potential of the Skorpion lead mineralization. Results of the study have shown that majority of the lead mineralization is hosted by the felsic metavolcanics as galena and subordinately in the metasiliciclastics as pyromorphite, a lead manganese phosphate. In terms of the mineral textures, the lead minerals appear to be mainly secondary phases that have been remobilized and reprecipitated around pyrite, within pyrite cracks and intergrown with minerals such as chalcocite and greenockite. Lead has been mainly concentrated along fault zones. The elevated pyromorphite concentrations tend to occur within gossanous zones in close association with iron and manganese oxides. These textures represent supergene enrichment of a sulphide proto ore. However, contrary to copper and zinc mineralization, lead was not remobilized far from the proto ore merely as a function of its poor mobility in acidic fluids (Reddy et al., 1995). This substantiates the concentration of secondary lead in the felsic metavolcanics and to a much lesser extent, in the metasiliciclastics. Both secondary zinc and copper were reprecipitated in the metasiliciclastics, further away from the sulphide proto ore, hosted mainly by the felsic metavolcanics. The average lead isotope ratios of 206Pb/204Pb (17.26), 207Pb/204Pb (15.60) and 208Pb/204Pb (37.42) resemble results provided by Frimmel (2004) for both the Skorpion and Rosh Pinah deposits. For the Skorpion samples from Frimmel (2004) had the following average ratios: 206Pb/204Pb (17.29), 207Pb/204Pb (15.59) and 208Pb/204Pb (37.51). The Rosh Pinah samples had the following average ratios: 206Pb/204Pb (17.17), 207Pb/204Pb (15.61) and 208Pb/204Pb (37.45). These results indicate lead derivation from the lower 2.0 Ga Eburnean pre-Gariep basement in agreement with and Frimmel et al. (2004). The host felsic metavolcanics might have been derived from melting of the basement rocks during the formation of the Adamastor Ocean. In comparison to the Rosh Pinah deposit lead isotope signatures, the Skorpion lead isotopes overlap with the Rosh Pinah deposit isotopes, but have a much narrower range. This is an indication of a much shorter lived and potentially faster mineralization event contrary to the SEDEX type Rosh Pinah deposit. The smaller tonnage of the Skorpion deposit, its inferior lead concentrations and the elevated radiogenic lead isotopes point toward a VMS deposit which was formed in a small graben fed by shallow conduits during a short lived mineralization event. Sedimentary rocks covered the forming deposit at a fast rate and impaired the deposit advancement. The interaction between the upper crustal rocks and the mineralizing fluids is what may have resulted in the elevated radiogenic lead signature. In contrast to this, SEDEX deposits such as the Rosh Pinah Deposit, are generally fed by deep seated conduits that allow more longer lived leaching of metals from the underlying basement rocks and generally allow minor influence from upper crustal rocks.
- Full Text:
- Date Issued: 2019
The challenges of professional women in a male-dominated South African construction industry
- Authors: Tyindyana, Xolile
- Date: 2019
- Subjects: Construction industry -- South Africa , Construction industry -- South Africa -- Management Women industrialists -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/44962 , vital:38192
- Description: The opinions that South African construction industry is the most untransformed sector, highly gender active and men have difficulty in accepting women in the construction industry, hindered the development of the South African economy. The improved number of professional women entering the statuses of this male dominance is noticeable, but the percentage of men still speak volume. Hence, there are imbalances that are correspondent to discrimination trials. This study explore challenges faced by professional women in the construction industry of South Africa, in the Eastern Cape. The study embraced exploratory research design in order to formulate preliminary investigations based on relatively unknown areas of professional women in construction industry. Therefore, this qualitative method incorporated interpretivism as its research philosophy, with the motive that this paradigm succeeds individual ontology that does not perceive as objective and independent. The purposeful sampling technique deployed in identifying the research participants, coupled by ten (10) women rendering professional services in the construction industry. Data collected was analysed thematically, which gave rise to presented themes, deliberated and construed in headings framed from research objectives. The study revealed that professional women still trapped between resisting, accommodating masculine politics and femininity distinctions regardless of evolutions. Most participants attested to the gender imbalances that propagates marginalisation, which is in line with the revelations. The study also suggest that men reject professionalism identity in the context of women. Other key challenges were not limited to backgrounds of the industry, outlook and progression that necessitated women taking executive positions. Further still, participants are aware of flouted construction industry policies and the strategies to use to by their counterparts to obscure them. Hence, the study suggested monitoring and review of policies in place by the policy makers. A recommended that similar research be carried out in South Africa, particularly provinces, as a literature gap has been identified. These recommended studies could enhance professional women, men and policy makers in profound consideration of the challenges faced by professional women in the construction industry.
- Full Text:
- Date Issued: 2019
- Authors: Tyindyana, Xolile
- Date: 2019
- Subjects: Construction industry -- South Africa , Construction industry -- South Africa -- Management Women industrialists -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/44962 , vital:38192
- Description: The opinions that South African construction industry is the most untransformed sector, highly gender active and men have difficulty in accepting women in the construction industry, hindered the development of the South African economy. The improved number of professional women entering the statuses of this male dominance is noticeable, but the percentage of men still speak volume. Hence, there are imbalances that are correspondent to discrimination trials. This study explore challenges faced by professional women in the construction industry of South Africa, in the Eastern Cape. The study embraced exploratory research design in order to formulate preliminary investigations based on relatively unknown areas of professional women in construction industry. Therefore, this qualitative method incorporated interpretivism as its research philosophy, with the motive that this paradigm succeeds individual ontology that does not perceive as objective and independent. The purposeful sampling technique deployed in identifying the research participants, coupled by ten (10) women rendering professional services in the construction industry. Data collected was analysed thematically, which gave rise to presented themes, deliberated and construed in headings framed from research objectives. The study revealed that professional women still trapped between resisting, accommodating masculine politics and femininity distinctions regardless of evolutions. Most participants attested to the gender imbalances that propagates marginalisation, which is in line with the revelations. The study also suggest that men reject professionalism identity in the context of women. Other key challenges were not limited to backgrounds of the industry, outlook and progression that necessitated women taking executive positions. Further still, participants are aware of flouted construction industry policies and the strategies to use to by their counterparts to obscure them. Hence, the study suggested monitoring and review of policies in place by the policy makers. A recommended that similar research be carried out in South Africa, particularly provinces, as a literature gap has been identified. These recommended studies could enhance professional women, men and policy makers in profound consideration of the challenges faced by professional women in the construction industry.
- Full Text:
- Date Issued: 2019
TiRiFiG, a graphical 3D kinematic modelling tool
- Authors: Twum, Samuel Nyarko
- Date: 2019
- Subjects: Tilted Ring Fitting GUI , Astronomy -- Observations , Galaxies -- Observations , Galaxies -- Measurement , Galaxies -- Measurement -- Data processing , Kinematics
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/76409 , vital:30558
- Description: Galaxy kinematics is of crucial importance to understanding the structure, formation and evolution of galaxies. The studies of mass distributions giving rise to the missing mass problem, first raised by Zwicky (1933), give us an insight into dark matter distributions which are tightly linked to cosmology. Neutral hydrogen (H i) has been widely used as a tracer in the kinematic studies of galaxies. The Square Kilometre Array (SKA) and its precursors will produce large Hi datasets which will require kinematic modelling tools to extract kinematic parameters such as rotation curves. TiRiFiC (Józsa et al., 2007) is an example of such a tool for 3D kinematic modelling of resolved spectroscopic observations of rotating disks in terms of the tilted-ring model with varying complexities. TiRiFiC can be used to model a large number (20+) of parameters which are set in a configuration file (.def) for its execution. However, manually editing these parameters in a text editor is uncomfortable. In this work, we present TiRiFiG, Tilted Ring Fitting GUI, which is the graphical user interface that provides an easy way for parameter inputs to be modified in an interactive manner.
- Full Text:
- Date Issued: 2019
- Authors: Twum, Samuel Nyarko
- Date: 2019
- Subjects: Tilted Ring Fitting GUI , Astronomy -- Observations , Galaxies -- Observations , Galaxies -- Measurement , Galaxies -- Measurement -- Data processing , Kinematics
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/76409 , vital:30558
- Description: Galaxy kinematics is of crucial importance to understanding the structure, formation and evolution of galaxies. The studies of mass distributions giving rise to the missing mass problem, first raised by Zwicky (1933), give us an insight into dark matter distributions which are tightly linked to cosmology. Neutral hydrogen (H i) has been widely used as a tracer in the kinematic studies of galaxies. The Square Kilometre Array (SKA) and its precursors will produce large Hi datasets which will require kinematic modelling tools to extract kinematic parameters such as rotation curves. TiRiFiC (Józsa et al., 2007) is an example of such a tool for 3D kinematic modelling of resolved spectroscopic observations of rotating disks in terms of the tilted-ring model with varying complexities. TiRiFiC can be used to model a large number (20+) of parameters which are set in a configuration file (.def) for its execution. However, manually editing these parameters in a text editor is uncomfortable. In this work, we present TiRiFiG, Tilted Ring Fitting GUI, which is the graphical user interface that provides an easy way for parameter inputs to be modified in an interactive manner.
- Full Text:
- Date Issued: 2019
Challenges in the implementation of a community police forum constitution: a case study of the beacon bay community police forum in the Eastern Cape
- Authors: Twani, Sydney Vuyisile
- Date: 2019
- Subjects: Community policing -- South Africa Crime prevention Police-community relations Police -- South Africa
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/11031 , vital:36687
- Description: The purpose of this study was to investigate the extent to which the Beacon Bay Community Police Forum in the East London area has implemented the Community Police Forum (CPF) uniform constitution. The main research question of this study was: To what extent has the Beacon Bay Community Police Forum in the East London area implemented the uniform Community Police Forum (CPF) constitution? The theoretical framework that guided this study was the broken windows theory. The literature review looked into the following: existing knowledge based on the assessment of the implementation of the uniform CPF constitution by the Beacon Bay Community Police Forum, the regulatory framework and an overview of the role and functions of the community police forum (CPF) in South Africa, lack of awareness and representativeness as challenges to community police forums effectiveness, inadequate resources in the implementation of an effective community policing forum, lack of trust between the police and the community and the issue of corruption as challenges in the implementation of CPF. The qualitative research method was used in this study. The case study design was also used. The researcher used the purposive sampling technique to select six community members and four community executives of the Beacon Bay CPF in the East London area. Face-to-face in-depth individual interviews were used to gather in-depth data. The manual method of analysis was used. The researcher analysed the data by capturing the patterns and direct words of the participants who were interviewed through note taking. Themes were drawn from the responses of the participants and analysed. Some of the findings were that: Community members did not know exactly when the CPF was implemented, the CPF was not effective, community members did not attend CPF meetings and had negative attitudes towards CPF, the police worked better with the rich people rather than the poor ones and there were some influences of politics in the CPF. In addition, the resources lacking at the CPF were: SAPS staff, shortage of police stations and insufficient vehicles at the police stations. Furthermore, some police worked hand-iniv hand with the criminals and the repercussions of poor trust between the community and the police included: community members taking the law into their own hands, poor handling of criminal cases, and escalation of crime in the community. Some community members noted the positive effect that the implementation of the community police forum had as they could now engage the police directly on matters relating to crime and how they think such challenges can be addressed. The researcher made some recommendations towards an effective implementation of the Community Police Forum in Beacon Bay in East London.
- Full Text:
- Date Issued: 2019
- Authors: Twani, Sydney Vuyisile
- Date: 2019
- Subjects: Community policing -- South Africa Crime prevention Police-community relations Police -- South Africa
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/11031 , vital:36687
- Description: The purpose of this study was to investigate the extent to which the Beacon Bay Community Police Forum in the East London area has implemented the Community Police Forum (CPF) uniform constitution. The main research question of this study was: To what extent has the Beacon Bay Community Police Forum in the East London area implemented the uniform Community Police Forum (CPF) constitution? The theoretical framework that guided this study was the broken windows theory. The literature review looked into the following: existing knowledge based on the assessment of the implementation of the uniform CPF constitution by the Beacon Bay Community Police Forum, the regulatory framework and an overview of the role and functions of the community police forum (CPF) in South Africa, lack of awareness and representativeness as challenges to community police forums effectiveness, inadequate resources in the implementation of an effective community policing forum, lack of trust between the police and the community and the issue of corruption as challenges in the implementation of CPF. The qualitative research method was used in this study. The case study design was also used. The researcher used the purposive sampling technique to select six community members and four community executives of the Beacon Bay CPF in the East London area. Face-to-face in-depth individual interviews were used to gather in-depth data. The manual method of analysis was used. The researcher analysed the data by capturing the patterns and direct words of the participants who were interviewed through note taking. Themes were drawn from the responses of the participants and analysed. Some of the findings were that: Community members did not know exactly when the CPF was implemented, the CPF was not effective, community members did not attend CPF meetings and had negative attitudes towards CPF, the police worked better with the rich people rather than the poor ones and there were some influences of politics in the CPF. In addition, the resources lacking at the CPF were: SAPS staff, shortage of police stations and insufficient vehicles at the police stations. Furthermore, some police worked hand-iniv hand with the criminals and the repercussions of poor trust between the community and the police included: community members taking the law into their own hands, poor handling of criminal cases, and escalation of crime in the community. Some community members noted the positive effect that the implementation of the community police forum had as they could now engage the police directly on matters relating to crime and how they think such challenges can be addressed. The researcher made some recommendations towards an effective implementation of the Community Police Forum in Beacon Bay in East London.
- Full Text:
- Date Issued: 2019
An explorative study into Faith healing as an African belief system and its influence on the diagnosis and treatment of mental illness in the Eastern Cape province, South Africa
- Authors: Tsotsi, Liso
- Date: 2019
- Subjects: Traditional medicine -- South Africa -- Eastern Cape , Spiritual healing -- South Africa -- Eastern Cape , Ethnopsychology -- South Africa -- Eastern Cape , Mental illness -- Treatment -- South Africa -- Eastern Cape , Mental illness -- Alternative treatment -- South Africa -- Eastern Cape
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/67753 , vital:29137
- Description: The present study specifically focussed on Faith healing as an indigenous healing system and its influence on the diagnosis and treatment of mental illnesses in the Eastern Cape province of South Africa. The study aimed to provide a descriptive overview of Faith healers’ perspectives on the diagnosis and treatment of mental illnesses in the Eastern Cape, as well as to compare conclusions reached with other categories of indigenous healers. The inter-category comparisons on a broader level allowed for a further comparative discourse with the mainstream western medical psychiatric view of mental illness. Therefore, the scope of this study does not include in-depth analyses of findings, but rather the generation of themes for comparative discussions. While there exists vast literature on the diagnostic and treatment perspectives of the other two categories of indigenous healing systems (traditional healers and herbalists), a limited number of studies have been focussed on Faith healing as an indigenous mode of healing. The present study attempted to address this gap in the literature in an effort to promote future collaborative work across all viewpoints, in the management of mental illnesses. This study, grounded in qualitative research, utilized thematic analysis as its theoretical framework. Non probability judgmental sampling was used to secure self-identifying Faith healers, where conclusions from them were drawn from data collected, using in depth semi-structured interviews and observation. The main findings of the study indicated that Faith healers’ perspectives on the diagnosis and treatment of mental illnesses are based mainly on indigenous cultural theories. Furthermore, that collaboration with other viewpoints is hampered by animosity, feelings of distrust and the fear of appearing inferior.
- Full Text:
- Date Issued: 2019
- Authors: Tsotsi, Liso
- Date: 2019
- Subjects: Traditional medicine -- South Africa -- Eastern Cape , Spiritual healing -- South Africa -- Eastern Cape , Ethnopsychology -- South Africa -- Eastern Cape , Mental illness -- Treatment -- South Africa -- Eastern Cape , Mental illness -- Alternative treatment -- South Africa -- Eastern Cape
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/67753 , vital:29137
- Description: The present study specifically focussed on Faith healing as an indigenous healing system and its influence on the diagnosis and treatment of mental illnesses in the Eastern Cape province of South Africa. The study aimed to provide a descriptive overview of Faith healers’ perspectives on the diagnosis and treatment of mental illnesses in the Eastern Cape, as well as to compare conclusions reached with other categories of indigenous healers. The inter-category comparisons on a broader level allowed for a further comparative discourse with the mainstream western medical psychiatric view of mental illness. Therefore, the scope of this study does not include in-depth analyses of findings, but rather the generation of themes for comparative discussions. While there exists vast literature on the diagnostic and treatment perspectives of the other two categories of indigenous healing systems (traditional healers and herbalists), a limited number of studies have been focussed on Faith healing as an indigenous mode of healing. The present study attempted to address this gap in the literature in an effort to promote future collaborative work across all viewpoints, in the management of mental illnesses. This study, grounded in qualitative research, utilized thematic analysis as its theoretical framework. Non probability judgmental sampling was used to secure self-identifying Faith healers, where conclusions from them were drawn from data collected, using in depth semi-structured interviews and observation. The main findings of the study indicated that Faith healers’ perspectives on the diagnosis and treatment of mental illnesses are based mainly on indigenous cultural theories. Furthermore, that collaboration with other viewpoints is hampered by animosity, feelings of distrust and the fear of appearing inferior.
- Full Text:
- Date Issued: 2019
Influence of laser surface treatment on residual stress distribution and dynamic properties in rotary friction welded ti-6al-4v components
- Authors: Tsikayi, Davies Shamiso
- Date: 2019
- Subjects: Lasers -- Industrial applications , Friction welding Pressure welding Metals -- Research
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/43823 , vital:37050
- Description: This manuscript details a study on laser surface treatment, a surface modification technique that is an easily flexible way of improving material surface properties of complex geometries. The research explored the potential of laser surface modification/treatment as a post welding surface processing technique for RFW Ti-6Al-4V ELI components by evaluating the microstructural effects, influence on fatigue life and the depth and magnitude of residual stresses induced. The outcome of this study reveals how post processing by laser surface modification affects crack initiation hence fatigue life and further explains mechanisms potentially contributing to enhanced joint properties. This study was accomplished by investigating the effect of laser surface treatment on surface properties of hourglass cylindrical rotary friction welded Ti-6Al-4V ELI specimens. Preliminary work was done in two stages. The first stage involved conducting laser surface treatment on 3 mm Ti-6Al-4V sheets. In this stage, an understanding of the process variables concerning the laser surface treatment process characteristics was established. Laser power and focus position were varied whilst scanning speed was kept constant. The observed macrographs were quantified in terms of laser penetration depth and width. A hardness and microstructural analysis was also conducted on selected specimens of the laser surface treated flat sheets trials. The second stage involved surface treatment of the hourglass fatigue specimen. This preliminary work allowed for the type and influence of treatment strategy to be analysed. The influence of treatment strategy on the depth of penetration was established with an emphasis on achieving homogeneity of the laser surface treated zone’s depth of penetration around the complete cylindrical specimen’s diameter. The final matrix involved varying laser power, scanning speed and focus position and the specimens were characterised by comparing hardness, residual stresses and microstructure. The results showed that laser surface treatment changed the hardness profile of the near surface of the specimen owing to the introduction of a homogenous microstructure at the surface as compared to a friction welded specimen. The microstructure was resolved using electron backscatter diffraction. A fully α-lamella microstructure was observed in the two specimens analysed at a position of 200 μm from the surface. The α-lamella had different width sizes with the low-power density specimen having a very fine microstructure as compared to that of the high-power density specimen. EBSD phase maps were also analysed for the parent, rotary friction welded only and friction welded laser surface treated specimens. The laser treated specimens showed virtually no β phase present as compared to the parent and rotary friction welded only specimens. LST processing improved the fatigue properties of the RFW specimens. The position of failure shifted from the HAZ to outside the RFW joint. This change in position was attributed to the surface modification by LST thereby introducing a more homogenous microstructure at the surface of the specimen. Additionally, it was also observed that the power density had an important role to play in the fatigue properties of the laser surface treated specimens. The high-power density LST specimens had a low fatigue limit compared to the low-power density specimens. The low fatigue limit at high- power density correlated with the residual stress results where the high-power density specimen had the highest attained surface tensile axial residual stresses. In conclusion, the main influences of laser surface treatment of small friction welded Ti-6Al-4V ELI components relate to an increase in fatigue properties by shifting crack initiation sites to less stressed areas. In this way, laser surface treatment could assist in the optimisation of manufacturing methodologies for small near net shape complex geometry components. The uniform and homogenous microstructure eliminates or reduces microstructural variations as observed in as welded components, reducing weld zone hardness variation. Additionally, the study showed that the introduction of a near surface refined microstructure inhibited crack initiation in the welded region.
- Full Text:
- Date Issued: 2019
- Authors: Tsikayi, Davies Shamiso
- Date: 2019
- Subjects: Lasers -- Industrial applications , Friction welding Pressure welding Metals -- Research
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/43823 , vital:37050
- Description: This manuscript details a study on laser surface treatment, a surface modification technique that is an easily flexible way of improving material surface properties of complex geometries. The research explored the potential of laser surface modification/treatment as a post welding surface processing technique for RFW Ti-6Al-4V ELI components by evaluating the microstructural effects, influence on fatigue life and the depth and magnitude of residual stresses induced. The outcome of this study reveals how post processing by laser surface modification affects crack initiation hence fatigue life and further explains mechanisms potentially contributing to enhanced joint properties. This study was accomplished by investigating the effect of laser surface treatment on surface properties of hourglass cylindrical rotary friction welded Ti-6Al-4V ELI specimens. Preliminary work was done in two stages. The first stage involved conducting laser surface treatment on 3 mm Ti-6Al-4V sheets. In this stage, an understanding of the process variables concerning the laser surface treatment process characteristics was established. Laser power and focus position were varied whilst scanning speed was kept constant. The observed macrographs were quantified in terms of laser penetration depth and width. A hardness and microstructural analysis was also conducted on selected specimens of the laser surface treated flat sheets trials. The second stage involved surface treatment of the hourglass fatigue specimen. This preliminary work allowed for the type and influence of treatment strategy to be analysed. The influence of treatment strategy on the depth of penetration was established with an emphasis on achieving homogeneity of the laser surface treated zone’s depth of penetration around the complete cylindrical specimen’s diameter. The final matrix involved varying laser power, scanning speed and focus position and the specimens were characterised by comparing hardness, residual stresses and microstructure. The results showed that laser surface treatment changed the hardness profile of the near surface of the specimen owing to the introduction of a homogenous microstructure at the surface as compared to a friction welded specimen. The microstructure was resolved using electron backscatter diffraction. A fully α-lamella microstructure was observed in the two specimens analysed at a position of 200 μm from the surface. The α-lamella had different width sizes with the low-power density specimen having a very fine microstructure as compared to that of the high-power density specimen. EBSD phase maps were also analysed for the parent, rotary friction welded only and friction welded laser surface treated specimens. The laser treated specimens showed virtually no β phase present as compared to the parent and rotary friction welded only specimens. LST processing improved the fatigue properties of the RFW specimens. The position of failure shifted from the HAZ to outside the RFW joint. This change in position was attributed to the surface modification by LST thereby introducing a more homogenous microstructure at the surface of the specimen. Additionally, it was also observed that the power density had an important role to play in the fatigue properties of the laser surface treated specimens. The high-power density LST specimens had a low fatigue limit compared to the low-power density specimens. The low fatigue limit at high- power density correlated with the residual stress results where the high-power density specimen had the highest attained surface tensile axial residual stresses. In conclusion, the main influences of laser surface treatment of small friction welded Ti-6Al-4V ELI components relate to an increase in fatigue properties by shifting crack initiation sites to less stressed areas. In this way, laser surface treatment could assist in the optimisation of manufacturing methodologies for small near net shape complex geometry components. The uniform and homogenous microstructure eliminates or reduces microstructural variations as observed in as welded components, reducing weld zone hardness variation. Additionally, the study showed that the introduction of a near surface refined microstructure inhibited crack initiation in the welded region.
- Full Text:
- Date Issued: 2019
Teacher practices and human capital acquisition: evidence from the international association for evaluation of educational achievement
- Authors: Tsikai,Epiphania
- Date: 2019
- Subjects: Human capital Academic achievement
- Language: English
- Type: Thesis , Masters , MCom (Economics)
- Identifier: http://hdl.handle.net/10353/17011 , vital:40811
- Description: Human capital is considered as the measure of education, skills, capacity and attributes of labour which impact people’s productive capacity and earning potential. The study used mathematics student academic performance as a proxy to measure human capital across countries using the Trends in International Mathematics and Science study (TIMSS) dataset. African countries participating in TIMSS are performing poorly as they are always at the bottom. The budget allocation of African countries is more than that of Asian countries, but the student outcomes do not correlate with the input. This is so disappointing considering the amount of money the governments invest in the education sectors. The study investigated teacher practices and human capital acquisition in four African countries that participated in TIMSS from 2007 to 2015. The four countries were South Africa, Botswana, Egypt and Morocco. In addition, the study included the best performing countries from East Asia that also participated in TIMSS. These four countries were Singapore, South Korea, Japan and Hong Kong Sar. The best performing countries were included in the analysis in order to determine best practice from the best performing countries. Using Stata 14, pooled OLS cross sections methodology was used to generate results on whether teacher practices influence students’ mathematics achievement by using grade 8 test scores per country, student and teacher background. The study found that some teacher practices significantly explain academic performance in mathematics especially in African countries whilst socio economic status significantly affect performance across all the countries. Future research will investigate some other measures that can promote good performance of mathematics in African countries.
- Full Text:
- Date Issued: 2019
- Authors: Tsikai,Epiphania
- Date: 2019
- Subjects: Human capital Academic achievement
- Language: English
- Type: Thesis , Masters , MCom (Economics)
- Identifier: http://hdl.handle.net/10353/17011 , vital:40811
- Description: Human capital is considered as the measure of education, skills, capacity and attributes of labour which impact people’s productive capacity and earning potential. The study used mathematics student academic performance as a proxy to measure human capital across countries using the Trends in International Mathematics and Science study (TIMSS) dataset. African countries participating in TIMSS are performing poorly as they are always at the bottom. The budget allocation of African countries is more than that of Asian countries, but the student outcomes do not correlate with the input. This is so disappointing considering the amount of money the governments invest in the education sectors. The study investigated teacher practices and human capital acquisition in four African countries that participated in TIMSS from 2007 to 2015. The four countries were South Africa, Botswana, Egypt and Morocco. In addition, the study included the best performing countries from East Asia that also participated in TIMSS. These four countries were Singapore, South Korea, Japan and Hong Kong Sar. The best performing countries were included in the analysis in order to determine best practice from the best performing countries. Using Stata 14, pooled OLS cross sections methodology was used to generate results on whether teacher practices influence students’ mathematics achievement by using grade 8 test scores per country, student and teacher background. The study found that some teacher practices significantly explain academic performance in mathematics especially in African countries whilst socio economic status significantly affect performance across all the countries. Future research will investigate some other measures that can promote good performance of mathematics in African countries.
- Full Text:
- Date Issued: 2019
The impact of policies on development-induced resettlement processes and outcomes: a Lesotho-India comparative study
- Tsietsi, Teboho Priscilla Mosuoe
- Authors: Tsietsi, Teboho Priscilla Mosuoe
- Date: 2019
- Subjects: Forced migration -- Lesotho , Forced migration -- India , Dams -- Social aspects -- Lesotho , Dams -- Social aspects -- India , Irrigation projects -- Economic aspects -- Lesotho , Irrigation projects -- Economic aspects -- India , Land settlement -- Government policy -- Lesotho , Land settlement -- Government policy -- India
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/72307 , vital:30032
- Description: The practice of Development-Induced Displacement and Resettlement (DIDR), historically, has often led to negative consequences for those affected by development projects, including but not limited to, the construction of large dams. Although DIDR arises from the need to provide goods and services that characterise development, it often leaves those who are forced to give up their assets, resources, and long standing social networks in dire socio-economic conditions as a result of resettlement. In many such cases, the provision for losses suffered by those primarily affected is often insufficient, leading to further losses experienced as a result of the complete life change experienced by those affected by resettlement. Research has shown that the insufficiency of such provisions for losses is attributable to not only the value of the provision itself, but also the manner in which resettlement processes are implemented. While early on, researchers believed that the development of policies would have a significant, positive impact on the practice of resettlement and its outcomes, evidence would later show that the development of policies alone is not a panacea for all challenges associated with forced resettlement. Further research revealed that resettlement is characterised by inherent and active complexities which are often at play, and may impede effective implementation. Hence, while the development of policies is essential, both the development and implementation of policies must be undertaken in a manner that seeks to actively address the inherent complexities of resettlement. This thesis aims to explore the implementation of resettlement policies in two case studies, where in one case, resettlement was informed by national policy, and in the other, by policies developed by a parastatal tasked with the responsibility of executing resettlement. The study makes a comparative analysis between the two cases, and explores the factors at play in the implementation of resettlement policies – whether such factors serve to facilitate or impede effective implementation – as well as the nature of the outcomes on the ground. As an overarching goal, the research aims to provide a basis upon which a framework for the development of a national level policy of resettlement may be developed. In this regard, the thesis undertakes a comparison of the Indian resettlement case with the Lesotho case. The former, in addition to having developed a resettlement policy at the national level, has a long history of experience in forced resettlement and displacement, from which invaluable lessons have been learned. The latter, on the other hand, has no resettlement policy at the national level, although the country has also experienced forced resettlement dating back to nearly three decades ago. Although India and Lesotho have distinct social, cultural, economic and demographic characteristics, research has shown that the complexities of forced resettlement, and their outcomes on affected people, are largely applicable across the different contexts. Hence, certain dimensions and lessons can be transferable from the Indian case to the Lesotho case, and vice versa. However, for the purpose of this thesis, the focus is on providing a basis for national policy development in Lesotho, in light of Indian policies and practice. The empirical basis of the thesis is an ethnographic study undertaken in relation to the Chandil Dam resettlement case in Jharkhand, India and the Mohale Dam resettlement case in Maseru, Lesotho. The thesis engaged both qualitative and quantitative research methods, as well as four, complementary theoretical tools that analyse the effects of forced resettlement on affected people. The thesis reveals that the negative consequences of forced resettlement resulting from its inherent complexities continue to manifest with concerning effects on the lives of those affected. It shows that the implementation of policies is a complex process that requires collaborative effort from a wide range of stakeholders in a given context. National policies of resettlement are, thus, instrumental in this regard, as they can create an enabling environment for the facilitation of collaborative efforts towards sustainable livelihood re-establishment for those who involuntarily suffer losses to resettlement.
- Full Text:
- Date Issued: 2019
- Authors: Tsietsi, Teboho Priscilla Mosuoe
- Date: 2019
- Subjects: Forced migration -- Lesotho , Forced migration -- India , Dams -- Social aspects -- Lesotho , Dams -- Social aspects -- India , Irrigation projects -- Economic aspects -- Lesotho , Irrigation projects -- Economic aspects -- India , Land settlement -- Government policy -- Lesotho , Land settlement -- Government policy -- India
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/72307 , vital:30032
- Description: The practice of Development-Induced Displacement and Resettlement (DIDR), historically, has often led to negative consequences for those affected by development projects, including but not limited to, the construction of large dams. Although DIDR arises from the need to provide goods and services that characterise development, it often leaves those who are forced to give up their assets, resources, and long standing social networks in dire socio-economic conditions as a result of resettlement. In many such cases, the provision for losses suffered by those primarily affected is often insufficient, leading to further losses experienced as a result of the complete life change experienced by those affected by resettlement. Research has shown that the insufficiency of such provisions for losses is attributable to not only the value of the provision itself, but also the manner in which resettlement processes are implemented. While early on, researchers believed that the development of policies would have a significant, positive impact on the practice of resettlement and its outcomes, evidence would later show that the development of policies alone is not a panacea for all challenges associated with forced resettlement. Further research revealed that resettlement is characterised by inherent and active complexities which are often at play, and may impede effective implementation. Hence, while the development of policies is essential, both the development and implementation of policies must be undertaken in a manner that seeks to actively address the inherent complexities of resettlement. This thesis aims to explore the implementation of resettlement policies in two case studies, where in one case, resettlement was informed by national policy, and in the other, by policies developed by a parastatal tasked with the responsibility of executing resettlement. The study makes a comparative analysis between the two cases, and explores the factors at play in the implementation of resettlement policies – whether such factors serve to facilitate or impede effective implementation – as well as the nature of the outcomes on the ground. As an overarching goal, the research aims to provide a basis upon which a framework for the development of a national level policy of resettlement may be developed. In this regard, the thesis undertakes a comparison of the Indian resettlement case with the Lesotho case. The former, in addition to having developed a resettlement policy at the national level, has a long history of experience in forced resettlement and displacement, from which invaluable lessons have been learned. The latter, on the other hand, has no resettlement policy at the national level, although the country has also experienced forced resettlement dating back to nearly three decades ago. Although India and Lesotho have distinct social, cultural, economic and demographic characteristics, research has shown that the complexities of forced resettlement, and their outcomes on affected people, are largely applicable across the different contexts. Hence, certain dimensions and lessons can be transferable from the Indian case to the Lesotho case, and vice versa. However, for the purpose of this thesis, the focus is on providing a basis for national policy development in Lesotho, in light of Indian policies and practice. The empirical basis of the thesis is an ethnographic study undertaken in relation to the Chandil Dam resettlement case in Jharkhand, India and the Mohale Dam resettlement case in Maseru, Lesotho. The thesis engaged both qualitative and quantitative research methods, as well as four, complementary theoretical tools that analyse the effects of forced resettlement on affected people. The thesis reveals that the negative consequences of forced resettlement resulting from its inherent complexities continue to manifest with concerning effects on the lives of those affected. It shows that the implementation of policies is a complex process that requires collaborative effort from a wide range of stakeholders in a given context. National policies of resettlement are, thus, instrumental in this regard, as they can create an enabling environment for the facilitation of collaborative efforts towards sustainable livelihood re-establishment for those who involuntarily suffer losses to resettlement.
- Full Text:
- Date Issued: 2019
A critical realist exploration of the culture of resistance in educational technology integration practices at a South African university
- Authors: Tshuma, Nompilo
- Date: 2019
- Subjects: Critical realism , Educational technology -- South Africa , Education, Higher -- Effect of technological innovations on -- South Africa , College teachers -- South Africa , College teaching -- Sociological aspects -- South Africa
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/72318 , vital:30033
- Description: This thesis seeks to address a number of troubling concerns related to research and practice in the field of educational technology in South African higher education. Firstly, educational technology research has been criticised for a lack of theoretical rigour resulting in perspectives that are tightly focused mostly on practice but fail to adequately interrogate the socio-political complexities of integrating educational technology. Secondly, while research in the field has been criticised for failing to adequately contextualise the study of educational technology, it also fails to interrogate the impact of colonial legacies and Western-developed technologies on integration practices. Thirdly, there seems to be a disconnect between academics’ practices and choices with educational technology, and the expectations and assumptions of educational technologists. As such, this thesis predominantly follows inductive reasoning where literature and theory are applied to the empirical situation retrospectively in order to avoid the potential influences and biases of mostly Western-driven discourses on educational technology integration practices. Critical realism is used to ‘underlabour’ this study. This meta-theory asserts that there are multiple perspectives of an independent reality, and the work of research is to use these perspectives to draw closer to an understanding of that reality. As such, it allows me to interrogate my perspectives firstly, and secondly those of my research participants, about factors that constrain educational technology integration in the South African context through the use of theory (abstract concepts) and data (research participants’ multiple perspectives). However, critical realism is somewhat cautious in how to access this reality. Therefore, a critical ethnographic epistemology is employed to strengthen critical realism’s aim of accessing knowledge. A critical epistemology emphasises exposing hidden power structures, value judgements as well as self-knowledge and reflexivity. The thesis thus shows how a critical realist ontology could be complemented by a critical ethnographic methodology, particularly in critically-orientated research that has an emancipatory focus which seeks to uncover the socio-political context within which educational technology practices take place. A key argument is that critical realism can be employed as an ontological underlabourer for critical research because of: 1) its immanent critique of traditionally-accepted philosophies, 2) its emphasis on critique of our knowledge claims and value judgements, 3) its insistence that knowledge of the social world necessarily precedes emancipation, and 4) its different conceptions of power (oppressive power and transformatory power). This critical ethnographic research is conducted in a South African university with eight female academics. Data collection is in the form of interviews, observations and reflections, as well as informal and work-related interactions. At each data collection moment, I have had to be reflexively aware of my positionality as an educational technologist, the impact of a colonially-motivated methodology and an ethically-aware approach that seeks to put the needs of the research participants first. Critical ethnography’s meaning-making and critical realism’s abduction and retroduction are used to analyse and make sense of the data. In my attempt to contextualise the study’s findings, I first uncover structural forces and their impact on the academic role before attempting to correlate this with educational technology practices. The study’s findings point to two main structural forces in the socio-political context of South African higher education: the teaching/research tension and the elevation of one dominant culture. In terms of the teaching/research tension, the female academics in this study have to balance the urgent teaching function with the valued research function. They struggle to find this balance because of ambiguous messages from different structures, their passion for teaching, oppressive departmental dynamics and the pressures of their career trajectory. The elevation of one dominant culture is demonstrated through both oppressive cultural practices and untransformed curricula. The study shows that academics mitigate these structural constraints mostly through subtle every day resistance that seeks to mitigate their effect on both the academics and, where applicable, their students. Archer’s morphogenetic/morphostatic cycle is used retrospectively, in response to fieldwork, to conceptualise why this resistance comes about. A resistance framework developed using Archer is then used to understand educational technology choices and practices. The results of the research show that while academics are often pictured as resistant to technology as a response to different barriers, they actually often employ technology to resist structural forces. That is, with this thesis I show that there is a focus on resistance with technology rather than resistance to technology. The study shows how the research participants resist structural forces (teaching tension and dominant culture) by using technology to create safe and responsive learning spaces. As such, this thesis challenges educational technologists to re-think the way they support academics by recommending support strategies that acknowledge both the structural forces in the South African higher education context, as well as the culture of resistance, both of which impact academics’ educational technology choices and practices.
- Full Text:
- Date Issued: 2019
- Authors: Tshuma, Nompilo
- Date: 2019
- Subjects: Critical realism , Educational technology -- South Africa , Education, Higher -- Effect of technological innovations on -- South Africa , College teachers -- South Africa , College teaching -- Sociological aspects -- South Africa
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/72318 , vital:30033
- Description: This thesis seeks to address a number of troubling concerns related to research and practice in the field of educational technology in South African higher education. Firstly, educational technology research has been criticised for a lack of theoretical rigour resulting in perspectives that are tightly focused mostly on practice but fail to adequately interrogate the socio-political complexities of integrating educational technology. Secondly, while research in the field has been criticised for failing to adequately contextualise the study of educational technology, it also fails to interrogate the impact of colonial legacies and Western-developed technologies on integration practices. Thirdly, there seems to be a disconnect between academics’ practices and choices with educational technology, and the expectations and assumptions of educational technologists. As such, this thesis predominantly follows inductive reasoning where literature and theory are applied to the empirical situation retrospectively in order to avoid the potential influences and biases of mostly Western-driven discourses on educational technology integration practices. Critical realism is used to ‘underlabour’ this study. This meta-theory asserts that there are multiple perspectives of an independent reality, and the work of research is to use these perspectives to draw closer to an understanding of that reality. As such, it allows me to interrogate my perspectives firstly, and secondly those of my research participants, about factors that constrain educational technology integration in the South African context through the use of theory (abstract concepts) and data (research participants’ multiple perspectives). However, critical realism is somewhat cautious in how to access this reality. Therefore, a critical ethnographic epistemology is employed to strengthen critical realism’s aim of accessing knowledge. A critical epistemology emphasises exposing hidden power structures, value judgements as well as self-knowledge and reflexivity. The thesis thus shows how a critical realist ontology could be complemented by a critical ethnographic methodology, particularly in critically-orientated research that has an emancipatory focus which seeks to uncover the socio-political context within which educational technology practices take place. A key argument is that critical realism can be employed as an ontological underlabourer for critical research because of: 1) its immanent critique of traditionally-accepted philosophies, 2) its emphasis on critique of our knowledge claims and value judgements, 3) its insistence that knowledge of the social world necessarily precedes emancipation, and 4) its different conceptions of power (oppressive power and transformatory power). This critical ethnographic research is conducted in a South African university with eight female academics. Data collection is in the form of interviews, observations and reflections, as well as informal and work-related interactions. At each data collection moment, I have had to be reflexively aware of my positionality as an educational technologist, the impact of a colonially-motivated methodology and an ethically-aware approach that seeks to put the needs of the research participants first. Critical ethnography’s meaning-making and critical realism’s abduction and retroduction are used to analyse and make sense of the data. In my attempt to contextualise the study’s findings, I first uncover structural forces and their impact on the academic role before attempting to correlate this with educational technology practices. The study’s findings point to two main structural forces in the socio-political context of South African higher education: the teaching/research tension and the elevation of one dominant culture. In terms of the teaching/research tension, the female academics in this study have to balance the urgent teaching function with the valued research function. They struggle to find this balance because of ambiguous messages from different structures, their passion for teaching, oppressive departmental dynamics and the pressures of their career trajectory. The elevation of one dominant culture is demonstrated through both oppressive cultural practices and untransformed curricula. The study shows that academics mitigate these structural constraints mostly through subtle every day resistance that seeks to mitigate their effect on both the academics and, where applicable, their students. Archer’s morphogenetic/morphostatic cycle is used retrospectively, in response to fieldwork, to conceptualise why this resistance comes about. A resistance framework developed using Archer is then used to understand educational technology choices and practices. The results of the research show that while academics are often pictured as resistant to technology as a response to different barriers, they actually often employ technology to resist structural forces. That is, with this thesis I show that there is a focus on resistance with technology rather than resistance to technology. The study shows how the research participants resist structural forces (teaching tension and dominant culture) by using technology to create safe and responsive learning spaces. As such, this thesis challenges educational technologists to re-think the way they support academics by recommending support strategies that acknowledge both the structural forces in the South African higher education context, as well as the culture of resistance, both of which impact academics’ educational technology choices and practices.
- Full Text:
- Date Issued: 2019
The contribution of tourism in local economic development: the case of Buffalo City Metropolitan Municipality
- Authors: Tshobeni, Yolanda
- Date: 2019
- Subjects: Local government -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape Sustainable development -- South Africa -- Eastern Cape , Tourism -- South Africa -- Buffalo City Metropolitan Municipality Tourism -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/43732 , vital:37039
- Description: The primary aim of the study was to analyse the contribution of tourism to Local economic development in BCMM. Tourism is one of the most important sectors of the economy and an extremely lucrative business. The industry is growing and carries great potential of contributing to a country and/or local areas’ economy and development. What motivated the study is that there are no published studies on the contribution of tourism to LED in BCMM. Therefore, is a lack of information on the importance of tourism activities on promoting the local communities’ economies and social well-being by helping to reduce poverty. Even though, the municipality gives some information on activities that are being done by the municipality to work with the local communities that have tourist attraction hubs, the information does not delve into economic issues that are needed to ensure that there is promotion of development in areas that are around the tourist attraction hubs. The study was qualitative and it used secondary data to achieve its objectives. Data was sourced from journals, municipal documents, newspapers and many other secondary sources. Results showed that tourism in BCCM has led to economic development in that there are quite a number of attractions and tourism products in the city i.e. museums, theatres, beautiful beaches, conference, restaurants, and accommodation facilities, and this is where job opportunities are created. The tourism sector is one of the key areas with great potential for poverty alleviation and has been taken as a key portfolio to be appropriately monitored to foster its growth and development in the Buffalo City Metropolitan.
- Full Text:
- Date Issued: 2019
- Authors: Tshobeni, Yolanda
- Date: 2019
- Subjects: Local government -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape Sustainable development -- South Africa -- Eastern Cape , Tourism -- South Africa -- Buffalo City Metropolitan Municipality Tourism -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/43732 , vital:37039
- Description: The primary aim of the study was to analyse the contribution of tourism to Local economic development in BCMM. Tourism is one of the most important sectors of the economy and an extremely lucrative business. The industry is growing and carries great potential of contributing to a country and/or local areas’ economy and development. What motivated the study is that there are no published studies on the contribution of tourism to LED in BCMM. Therefore, is a lack of information on the importance of tourism activities on promoting the local communities’ economies and social well-being by helping to reduce poverty. Even though, the municipality gives some information on activities that are being done by the municipality to work with the local communities that have tourist attraction hubs, the information does not delve into economic issues that are needed to ensure that there is promotion of development in areas that are around the tourist attraction hubs. The study was qualitative and it used secondary data to achieve its objectives. Data was sourced from journals, municipal documents, newspapers and many other secondary sources. Results showed that tourism in BCCM has led to economic development in that there are quite a number of attractions and tourism products in the city i.e. museums, theatres, beautiful beaches, conference, restaurants, and accommodation facilities, and this is where job opportunities are created. The tourism sector is one of the key areas with great potential for poverty alleviation and has been taken as a key portfolio to be appropriately monitored to foster its growth and development in the Buffalo City Metropolitan.
- Full Text:
- Date Issued: 2019
Application of computational methods in elucidating the isomerization step in the biosynthesis of coumarins
- Authors: Tshiwawa, Tendamudzimu
- Date: 2019
- Subjects: Coumarins , Isomerization , Biosynthesis , Organic compounds -- Synthesis , Cinnamic acid
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/67646 , vital:29124
- Description: The identity of the enzyme(s) responsible for the biosynthetic transformation of cinnamic acid derivatives to important, naturally occurring coumarins has yet to be established. This study constitutes a high-level theoretical analysis of the possibility that a recently reported molecular mechanism of the synthesis of coumarins from Baylis-Hillman adducts, may provide a viable model for three critical phases in the biosynthetic pathway Particular attention has been given to the first of these phases: i) E→Z isomerisation of the cinnamic acid precursor; ii) Cyclisation (lactonisation) to the hemi-acetal intermediate; and ii) Dehydration to afford the coumarin derivative. In order to accomplish this analysis, an enzyme capable, theoretically, of effecting this E→Z isomerisation required identification, and its potential involvement in the transformation mechanism explored. Combined Molecular Mechanics and high-level Quantum Mechanical/DFT calculations were used to access complementary models of appropriate complexes and relevant processes within the enzyme active sites of a range of eleven Chalcone Isomerase (CHI) enzyme candidates, the structures of which were downloaded from the Protein Data Bank. Detailed B3LYP/6-31+G(d,p) calculations have provided pictures of the relative populations of conformations within the ensemble of conformations available at normal temperatures. Conformations of several protonation states of cinnamic acid derivatives have been studied in this way, and the results obtained showed that coupled protonation and deprotonation of (E)-o-coumaric acid provides a viable approach to achieve the E→Z isomerization. In silico docking of the B3LYP/6-31+G(d,p) optimized (E)-o-coumaric acid derivatives in the active sites of each of the candidate CHI enzymes (CHI) revealed that (E)-o-coumaric acid fits well within the active sites of Medicago Sativa CHI crystallographic structures with 1FM8 showing best potential for not only accommodating (E)-o-coumaric acid , but also providing appropriate protein active site residues to effect the simultaneous protonation and deprotonation of the substrate , two residues being optimally placed to facilitate these critical processes. Further exploration of the chemical properties and qualities of selected CHI enzymes, undertaken using High Throughput Virtual Screening (HTVS), confirmed 1FM8 as a viable choice for further studies of the enzyme-catalysed E→Z isomerization of (E)-o-coumaric acid. A molecular dynamics study, performed to further evaluate the evolution of (E)-o-coumaric acid in the CHI active site over time, showed that the ligand in the 1FM8 active site is not only stable, but also that the desired protein-ligand interactions persist throughout the simulation period to facilitate the E→Z isomerization. An integrated molecular orbital and molecular mechanics (ONIOM) study of the 1FM8-(E)-o-coumaric acid complex, involving the direct protonation and deprotonation of the ligand by protein residues; has provided a plausible mechanism for the E → Z isomerization of (E)-o-coumaric acid within the 1FM8 active site; a transition state complex (with an activation energy of ca. 50 kCal.mol-1) has been located and its connection with both the (E)- and (Z)-o-coumaric acid isomer has been confirmed by Intrinsic Reaction Coordinate (IRC) calculations. More realistic models of the 1FM8-(E)-o-coumaric acid complex, with the inclusion of water solvent molecules, have been obtained at both the QM/MM and adaptive QM/MM levels which simulate the dynamic active site at the QM level. The results indicate that the simultaneous protonation and deprotonation of (E)-o-coumaric acid within the CHI enzyme is a water-mediated process – a conclusion consistent with similar reported processes. Visual inspection of the 1FM8-(Z)-o-coumaric acid complex reveals both the necessary orientation of the phenolic and carboxylic acid moieties of the (Z)-o-coumaric acid and the presence of appropriate, proximal active site residues with the potential to permit catalysis of the subsequent lactonisation and dehydration steps required to generate coumarin.
- Full Text:
- Date Issued: 2019
- Authors: Tshiwawa, Tendamudzimu
- Date: 2019
- Subjects: Coumarins , Isomerization , Biosynthesis , Organic compounds -- Synthesis , Cinnamic acid
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/67646 , vital:29124
- Description: The identity of the enzyme(s) responsible for the biosynthetic transformation of cinnamic acid derivatives to important, naturally occurring coumarins has yet to be established. This study constitutes a high-level theoretical analysis of the possibility that a recently reported molecular mechanism of the synthesis of coumarins from Baylis-Hillman adducts, may provide a viable model for three critical phases in the biosynthetic pathway Particular attention has been given to the first of these phases: i) E→Z isomerisation of the cinnamic acid precursor; ii) Cyclisation (lactonisation) to the hemi-acetal intermediate; and ii) Dehydration to afford the coumarin derivative. In order to accomplish this analysis, an enzyme capable, theoretically, of effecting this E→Z isomerisation required identification, and its potential involvement in the transformation mechanism explored. Combined Molecular Mechanics and high-level Quantum Mechanical/DFT calculations were used to access complementary models of appropriate complexes and relevant processes within the enzyme active sites of a range of eleven Chalcone Isomerase (CHI) enzyme candidates, the structures of which were downloaded from the Protein Data Bank. Detailed B3LYP/6-31+G(d,p) calculations have provided pictures of the relative populations of conformations within the ensemble of conformations available at normal temperatures. Conformations of several protonation states of cinnamic acid derivatives have been studied in this way, and the results obtained showed that coupled protonation and deprotonation of (E)-o-coumaric acid provides a viable approach to achieve the E→Z isomerization. In silico docking of the B3LYP/6-31+G(d,p) optimized (E)-o-coumaric acid derivatives in the active sites of each of the candidate CHI enzymes (CHI) revealed that (E)-o-coumaric acid fits well within the active sites of Medicago Sativa CHI crystallographic structures with 1FM8 showing best potential for not only accommodating (E)-o-coumaric acid , but also providing appropriate protein active site residues to effect the simultaneous protonation and deprotonation of the substrate , two residues being optimally placed to facilitate these critical processes. Further exploration of the chemical properties and qualities of selected CHI enzymes, undertaken using High Throughput Virtual Screening (HTVS), confirmed 1FM8 as a viable choice for further studies of the enzyme-catalysed E→Z isomerization of (E)-o-coumaric acid. A molecular dynamics study, performed to further evaluate the evolution of (E)-o-coumaric acid in the CHI active site over time, showed that the ligand in the 1FM8 active site is not only stable, but also that the desired protein-ligand interactions persist throughout the simulation period to facilitate the E→Z isomerization. An integrated molecular orbital and molecular mechanics (ONIOM) study of the 1FM8-(E)-o-coumaric acid complex, involving the direct protonation and deprotonation of the ligand by protein residues; has provided a plausible mechanism for the E → Z isomerization of (E)-o-coumaric acid within the 1FM8 active site; a transition state complex (with an activation energy of ca. 50 kCal.mol-1) has been located and its connection with both the (E)- and (Z)-o-coumaric acid isomer has been confirmed by Intrinsic Reaction Coordinate (IRC) calculations. More realistic models of the 1FM8-(E)-o-coumaric acid complex, with the inclusion of water solvent molecules, have been obtained at both the QM/MM and adaptive QM/MM levels which simulate the dynamic active site at the QM level. The results indicate that the simultaneous protonation and deprotonation of (E)-o-coumaric acid within the CHI enzyme is a water-mediated process – a conclusion consistent with similar reported processes. Visual inspection of the 1FM8-(Z)-o-coumaric acid complex reveals both the necessary orientation of the phenolic and carboxylic acid moieties of the (Z)-o-coumaric acid and the presence of appropriate, proximal active site residues with the potential to permit catalysis of the subsequent lactonisation and dehydration steps required to generate coumarin.
- Full Text:
- Date Issued: 2019
The interaction between oil price shocks, currency volatility and stock market prices: evidence from South Africa
- Authors: Tshivhase, Mikovhe
- Date: 2019
- Subjects: Petroleum products -- Prices , Accounting and price fluctuations , Inflation (Finance) -- South Africa , Stock exchanges , Economics
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/43834 , vital:37051
- Description: Crude oil is an essential and strategic commodity in modern economies. Therefore, energy price fluctuations have the potential of affecting the economic welfare of a country. For instance, they have the potential to undermine the government’s attainment of its economic growth targets (National Treasury, 2016:2). The South African Reserve Bank (SARB) also considers oil price movements to be one of the major threats to currency volatility and the continued attainment of its inflation targets of about (3-6, per cent), as evidenced by numerous recent statements by its monetary policy committee (SARB, 2016:5-13). This study used co-integration tests to investigate the interaction between oil price shocks, exchange rates and stock market prices in South Africa over the period 1 January 2011 to 1 April 2018. The study employed the Johansen co-integration test. The results found no long run co-integration between oil prices, exchange rate and stock market prices. Therefore, this study adopted the VAR model for causality tests. Using the VAR model, this study found the existence of a unidirectional causality between stock prices and oil prices, with stock prices leading the oil prices changes. The all share index, resources and financials index were found to be significant variables to explain oil prices. This result is consistent with the business cycle view, which states that oil price fluctuations are mainly driven by demand factors. Furthermore, strong world output growth trends especially in emerging markets, could give rise to an upward surge in oil prices. The study also found that there is a weak correlation between stock price and exchange rate in South Africa. This is consistent with the asset approach. The findings of this study add to the already largely debated theories that seek to explain the relationship between the oil prices, exchange rates and stock market prices. The recommendation of this research is that, policy makers, researchers and investment bankers or fund managers who have interest or trade these financial instruments, may have to consider the role of stock market prices in the various sectors of the economy in their models for forecasting the path of the oil prices and the Rand/US Dollar exchange rate trend.
- Full Text:
- Date Issued: 2019
- Authors: Tshivhase, Mikovhe
- Date: 2019
- Subjects: Petroleum products -- Prices , Accounting and price fluctuations , Inflation (Finance) -- South Africa , Stock exchanges , Economics
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/43834 , vital:37051
- Description: Crude oil is an essential and strategic commodity in modern economies. Therefore, energy price fluctuations have the potential of affecting the economic welfare of a country. For instance, they have the potential to undermine the government’s attainment of its economic growth targets (National Treasury, 2016:2). The South African Reserve Bank (SARB) also considers oil price movements to be one of the major threats to currency volatility and the continued attainment of its inflation targets of about (3-6, per cent), as evidenced by numerous recent statements by its monetary policy committee (SARB, 2016:5-13). This study used co-integration tests to investigate the interaction between oil price shocks, exchange rates and stock market prices in South Africa over the period 1 January 2011 to 1 April 2018. The study employed the Johansen co-integration test. The results found no long run co-integration between oil prices, exchange rate and stock market prices. Therefore, this study adopted the VAR model for causality tests. Using the VAR model, this study found the existence of a unidirectional causality between stock prices and oil prices, with stock prices leading the oil prices changes. The all share index, resources and financials index were found to be significant variables to explain oil prices. This result is consistent with the business cycle view, which states that oil price fluctuations are mainly driven by demand factors. Furthermore, strong world output growth trends especially in emerging markets, could give rise to an upward surge in oil prices. The study also found that there is a weak correlation between stock price and exchange rate in South Africa. This is consistent with the asset approach. The findings of this study add to the already largely debated theories that seek to explain the relationship between the oil prices, exchange rates and stock market prices. The recommendation of this research is that, policy makers, researchers and investment bankers or fund managers who have interest or trade these financial instruments, may have to consider the role of stock market prices in the various sectors of the economy in their models for forecasting the path of the oil prices and the Rand/US Dollar exchange rate trend.
- Full Text:
- Date Issued: 2019
The Kinshasa-based Kin ArtStudio in the Democratic Republic of Congo: visual arts spaces and the potential to challenge global art's representative and legitimizing mechanisms
- Tshilumba Mukendi, Jean-Sylvain
- Authors: Tshilumba Mukendi, Jean-Sylvain
- Date: 2019
- Subjects: Space (Art) , Art -- Congo (Democratic Republic) , Art and globalization , Postcolonialism and the arts -- Congo (Democratic Republic) , Arts, Modern -- 21st century , Arts publicity , Arts, Modern -- 21st century -- Economic aspects , Arts, Modern -- 21st century -- Social aspects , Bondo, Vitshois Mwilambwe , Kin ArtStudio , Beauté Congo – 1926-2015 – Congo Kitoko
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/115050 , vital:34073
- Description: The emergence of visual art spaces over the past few decades on the African continent invites art practitioners, historians and critics to re-examine the conditions of production, diffusion and reception of contemporary art of Africa. In this thesis I critically engage with these conditions in relation to artworks and practices of the Democratic Republic of Congo, considering the curatorial logic that has governed the ‘global art world’. I focus on the Kin ArtStudio as my main case study. I undertook research within this art space in 2016, from the 10th of April to the 15th of June, and again from the 16th of July to the 12th of September. My position as a participant observer turned out to be as engaging as informative. The Kin ArtStudio is a Kinshasa-based visual art platform founded in 2011 by the Congolese artist Vitshois Mwilambwe Bondo. It was established out of the will to empower emerging artists in that specific context, and facilitate the negotiation that the legitimization of their creations entails in today’s global art and cultural dynamics. In order to evaluate the stakes of such negotiation, I start with reviewing the existing mechanisms, trends and networks that have legitimized visual art productions of the Democratic Republic of Congo on a global stage, as exemplified by the Beauté Congo – Congo Kitoko exhibition (2015). Then, my enquiry evolves towards specificity, towards the immediacy and the subjectivity that characterize Kinshasa's urban and socio-cultural context, and visual art practices therein. Subjectivity also applies to my four months immersive experience with that art space. Drawing from my observations, setbacks, hopes and recent academic and practical debates around contemporary art practices on the African continent, the role those art spaces can play in the curatorship, circulation, reception and commodification of contemporary art productions cannot be underestimated. While operating in lasting postcolonial settings, they are going through the negotiation of their global and translocal situatedness, which can in turn lead to new legitimizing narratives. These will more appropriately inform understandings of contemporary art practices of Africa, challenging the identifying prism sustained by the ‘global art world’.
- Full Text:
- Date Issued: 2019
- Authors: Tshilumba Mukendi, Jean-Sylvain
- Date: 2019
- Subjects: Space (Art) , Art -- Congo (Democratic Republic) , Art and globalization , Postcolonialism and the arts -- Congo (Democratic Republic) , Arts, Modern -- 21st century , Arts publicity , Arts, Modern -- 21st century -- Economic aspects , Arts, Modern -- 21st century -- Social aspects , Bondo, Vitshois Mwilambwe , Kin ArtStudio , Beauté Congo – 1926-2015 – Congo Kitoko
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/115050 , vital:34073
- Description: The emergence of visual art spaces over the past few decades on the African continent invites art practitioners, historians and critics to re-examine the conditions of production, diffusion and reception of contemporary art of Africa. In this thesis I critically engage with these conditions in relation to artworks and practices of the Democratic Republic of Congo, considering the curatorial logic that has governed the ‘global art world’. I focus on the Kin ArtStudio as my main case study. I undertook research within this art space in 2016, from the 10th of April to the 15th of June, and again from the 16th of July to the 12th of September. My position as a participant observer turned out to be as engaging as informative. The Kin ArtStudio is a Kinshasa-based visual art platform founded in 2011 by the Congolese artist Vitshois Mwilambwe Bondo. It was established out of the will to empower emerging artists in that specific context, and facilitate the negotiation that the legitimization of their creations entails in today’s global art and cultural dynamics. In order to evaluate the stakes of such negotiation, I start with reviewing the existing mechanisms, trends and networks that have legitimized visual art productions of the Democratic Republic of Congo on a global stage, as exemplified by the Beauté Congo – Congo Kitoko exhibition (2015). Then, my enquiry evolves towards specificity, towards the immediacy and the subjectivity that characterize Kinshasa's urban and socio-cultural context, and visual art practices therein. Subjectivity also applies to my four months immersive experience with that art space. Drawing from my observations, setbacks, hopes and recent academic and practical debates around contemporary art practices on the African continent, the role those art spaces can play in the curatorship, circulation, reception and commodification of contemporary art productions cannot be underestimated. While operating in lasting postcolonial settings, they are going through the negotiation of their global and translocal situatedness, which can in turn lead to new legitimizing narratives. These will more appropriately inform understandings of contemporary art practices of Africa, challenging the identifying prism sustained by the ‘global art world’.
- Full Text:
- Date Issued: 2019
Trade union liability for unprotected strike action and violence in furtherance thereof
- Authors: Tshentu, Nolitha
- Date: 2019
- Subjects: Strikes and lockouts -- Law and legislation -- South Africa , Strikes and lockouts -- South Africa Strikes and lockouts Labor unions -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/43743 , vital:37040
- Description: The right to strike is a constitutional right and is integral to the process of collective bargaining. Collective bargaining tends to focus on sensitive issues like wages, as well as terms and conditions of employment. Resolving these issues often requires compromise from both parties through the collective bargaining process. However, in the earlier stages of labour law there was no collective bargaining. There was a master and servant relationship, there was no compromise, and it was limited only to the individual contract of hire. As much as a strikes are a constitutional right and are recognised by the law, they don’t seem to happen without violence and destruction of property. There are some views that view violence as being synonymous with strikes in South Africa. The legal framework is very clear and supports the right to strike, and emphasises that any demonstrations and picketing should be peaceful. Section 68(1)(b) of the LRA should be a solution to the violence that comes with unprotected strikes. This section refers to just and equitable compensation, it does not equate to full loss suffered and it also depends on the merits of each case. The ILO’s approach to illegitimate actions linked to strikes should be proportionate to the offence of fault committed. The Constitution saw South Africa making a clean break with the past. The Constitution is focused on ensuring human dignity, the achievement of equality and advancement of human rights and freedoms.1 According to the Constitution the right to assemble and demonstrate must be peaceful. According to Grogan the right is now seen as a necessary adjunct to collective bargaining and is constitutionally entrenched.2 The LRA supports participation in protected strikes. In cases of unprotected strikes allows employers to interdict that particular strike, sue for compensation in cases of damages and losses and also to discipline employees. The Regulations of the Gatherings Act (RGA) was introduced to reconcile the right of assemblers with the state’s interest in maintaining public order. Section 11 of this Act seeks to deter violence and discourages violation of others by ensuring that organisers are held liable. The LRA holds the trade union and its members liable for the damages and violence that is accompanied by unprotected strikes. Section 68(1)(b) seeks just and equitable compensation for damages caused during an unprotected strike. However even though there is recourse for the damages suffered during the protest, unprotected strikes still continue and the violence is still part of the strikes. It is proper to ask if this section is really serving what it was intended. Surely the intention of this section was to deter strikers from embarking on unprotected strikes as the LRA is very clear on the procedure to be followed before a strike action takes place. Another intention of this section is to curb the violence during strikes. This section seems to have fallen on deaf ears.
- Full Text:
- Date Issued: 2019
- Authors: Tshentu, Nolitha
- Date: 2019
- Subjects: Strikes and lockouts -- Law and legislation -- South Africa , Strikes and lockouts -- South Africa Strikes and lockouts Labor unions -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/43743 , vital:37040
- Description: The right to strike is a constitutional right and is integral to the process of collective bargaining. Collective bargaining tends to focus on sensitive issues like wages, as well as terms and conditions of employment. Resolving these issues often requires compromise from both parties through the collective bargaining process. However, in the earlier stages of labour law there was no collective bargaining. There was a master and servant relationship, there was no compromise, and it was limited only to the individual contract of hire. As much as a strikes are a constitutional right and are recognised by the law, they don’t seem to happen without violence and destruction of property. There are some views that view violence as being synonymous with strikes in South Africa. The legal framework is very clear and supports the right to strike, and emphasises that any demonstrations and picketing should be peaceful. Section 68(1)(b) of the LRA should be a solution to the violence that comes with unprotected strikes. This section refers to just and equitable compensation, it does not equate to full loss suffered and it also depends on the merits of each case. The ILO’s approach to illegitimate actions linked to strikes should be proportionate to the offence of fault committed. The Constitution saw South Africa making a clean break with the past. The Constitution is focused on ensuring human dignity, the achievement of equality and advancement of human rights and freedoms.1 According to the Constitution the right to assemble and demonstrate must be peaceful. According to Grogan the right is now seen as a necessary adjunct to collective bargaining and is constitutionally entrenched.2 The LRA supports participation in protected strikes. In cases of unprotected strikes allows employers to interdict that particular strike, sue for compensation in cases of damages and losses and also to discipline employees. The Regulations of the Gatherings Act (RGA) was introduced to reconcile the right of assemblers with the state’s interest in maintaining public order. Section 11 of this Act seeks to deter violence and discourages violation of others by ensuring that organisers are held liable. The LRA holds the trade union and its members liable for the damages and violence that is accompanied by unprotected strikes. Section 68(1)(b) seeks just and equitable compensation for damages caused during an unprotected strike. However even though there is recourse for the damages suffered during the protest, unprotected strikes still continue and the violence is still part of the strikes. It is proper to ask if this section is really serving what it was intended. Surely the intention of this section was to deter strikers from embarking on unprotected strikes as the LRA is very clear on the procedure to be followed before a strike action takes place. Another intention of this section is to curb the violence during strikes. This section seems to have fallen on deaf ears.
- Full Text:
- Date Issued: 2019
Template ecological analsyis of the narratives of partner’s and family member’s of women who consumed alcohol in pregnancy
- Authors: Tsetse, Agrinette Nontozamo
- Date: 2019
- Subjects: Pregnant women -- Alcohol use -- Social aspects , Substance abuse in pregnancy , Fetus -- Effect of drugs on , Pregnancy -- Psychological aspects , Pregnant women -- Substance use , Substance abuse -- Social aspects , Ecological Systems Theory
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/114905 , vital:34055
- Description: Although there is increasing research on alcohol in South Africa, most of this work has an epidemiological focus. Very little research has explored alcohol use during pregnancy specifically from the perspective of the woman’s partner or family member or focused on contextual risk factors beyond the pregnant woman. This information is important to ensure that interventions are formulated based on the social contexts within which drinking in pregnancy takes place and in guiding interventions that aim to prevent prenatal alcohol use, thereby preventing the occurrence of FASDs. This study was guided by Bronfenbrenner’s Ecological Systems Theory to understand partners’ and family members’ perspectives of prenatal exposure within the actual environments in which alcohol use takes place. According to this theory, an individual exists within layers of social relationships: the family, intimate partners, friendships, and healthcare workers (microsystems), interactions among these microsystems, for example, interaction between healthcare workers and intimate partner and family and social workers (mesosystem), accessibility of alcohol in the neighbourhoods (exosystems), religion, culture and society (macro-systems) and changes of the individual and socio-historical context (chronosystem). The data were collected using a biographic narrative interpretive method of interviewing. Thirteen narratives interviews were conducted with partners and family members in a disadvantaged community in Buffalo City, Eastern Cape Province. The interviews were analysed using Template Analysis within the Ecological Systems Theory to interrogate the stories of partners and family members. According to participants, some of the reasons women consumed alcohol in pregnancy are: drinking habits before pregnancy that were difficult to break in pregnancy; women drank during the first trimester of their pregnancy because of unplanned pregnancy; women continued drinking throughout their pregnancies to cope with the emotional upset caused by the trauma of rape and losing loved ones, stress, receiving HIV-diagnosis in pregnancy, intimate partner violence, infidelity, rejection and denial of pregnancy from partners. After birth, some women continued drinking. Consequently, their children were taken away from them by social workers and family members because the parents were unable to care for the child due to alcohol use. There was lack of compliance of shebeens with liquor regulations, heavy drinking, high rates of alcohol use in pregnancy, and easy accessibility of alcohol within this study community. Pregnant women used religious coping beliefs to cope with their circumstances such as changes in their health, relationships and finances. Drinking during pregnancy is a complex problem that stems from multiple social and structural issues and interventions should therefore not only focus on the individual, but also on social networks and communities.
- Full Text:
- Date Issued: 2019
- Authors: Tsetse, Agrinette Nontozamo
- Date: 2019
- Subjects: Pregnant women -- Alcohol use -- Social aspects , Substance abuse in pregnancy , Fetus -- Effect of drugs on , Pregnancy -- Psychological aspects , Pregnant women -- Substance use , Substance abuse -- Social aspects , Ecological Systems Theory
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/114905 , vital:34055
- Description: Although there is increasing research on alcohol in South Africa, most of this work has an epidemiological focus. Very little research has explored alcohol use during pregnancy specifically from the perspective of the woman’s partner or family member or focused on contextual risk factors beyond the pregnant woman. This information is important to ensure that interventions are formulated based on the social contexts within which drinking in pregnancy takes place and in guiding interventions that aim to prevent prenatal alcohol use, thereby preventing the occurrence of FASDs. This study was guided by Bronfenbrenner’s Ecological Systems Theory to understand partners’ and family members’ perspectives of prenatal exposure within the actual environments in which alcohol use takes place. According to this theory, an individual exists within layers of social relationships: the family, intimate partners, friendships, and healthcare workers (microsystems), interactions among these microsystems, for example, interaction between healthcare workers and intimate partner and family and social workers (mesosystem), accessibility of alcohol in the neighbourhoods (exosystems), religion, culture and society (macro-systems) and changes of the individual and socio-historical context (chronosystem). The data were collected using a biographic narrative interpretive method of interviewing. Thirteen narratives interviews were conducted with partners and family members in a disadvantaged community in Buffalo City, Eastern Cape Province. The interviews were analysed using Template Analysis within the Ecological Systems Theory to interrogate the stories of partners and family members. According to participants, some of the reasons women consumed alcohol in pregnancy are: drinking habits before pregnancy that were difficult to break in pregnancy; women drank during the first trimester of their pregnancy because of unplanned pregnancy; women continued drinking throughout their pregnancies to cope with the emotional upset caused by the trauma of rape and losing loved ones, stress, receiving HIV-diagnosis in pregnancy, intimate partner violence, infidelity, rejection and denial of pregnancy from partners. After birth, some women continued drinking. Consequently, their children were taken away from them by social workers and family members because the parents were unable to care for the child due to alcohol use. There was lack of compliance of shebeens with liquor regulations, heavy drinking, high rates of alcohol use in pregnancy, and easy accessibility of alcohol within this study community. Pregnant women used religious coping beliefs to cope with their circumstances such as changes in their health, relationships and finances. Drinking during pregnancy is a complex problem that stems from multiple social and structural issues and interventions should therefore not only focus on the individual, but also on social networks and communities.
- Full Text:
- Date Issued: 2019