Human capital Development and Economic Growth: A cross country study
- Authors: Sokanti, Thembalethu
- Date: 2020
- Subjects: Economic development Human capital
- Language: English
- Type: Thesis , Masters , MCom (Economics)
- Identifier: http://hdl.handle.net/10353/18985 , vital:43005
- Description: The study examined the impact of human capital development on economic growth for 129 countries comprising of developed and developing countries. The primary focus of the study is on examining the contribution of human capital index components on economic growth for the period 2014 to 2017. The panel data model was employed in the study. Firstly, the hausman test was used to determine the suitable method between fixed and random effects. The fixed effects model was selected as the best panel econometric technique to be used in the study. The empirical results showed that there is a positive and statistically significant relationship between human capital index components (capacity, development, deployment and know how) and economic growth. The study also found that these components of human capital index have more impact on economic growth when they are interacted together based on theories of human capital and economic growth. Capacity and development are found to be the best contributors to economic growth for all the regions; thus, the study recommends that for economic growth to be increased, countries should invest more of their funds on capacity and development sub- indexes of human capital index. Exchange rates and inflation are found to have a negative relationship with the economic growth, while interest rates are found to have a positive and statistical relationship with the economic growth. The study also found out that there is a regional effect associated with human capital development, with European region being the best contributor to GDP. The components of human capital index also found to be important for all regions to invest on to improve economic performance. Deployment is found not to be significant is Sub-Saharan Africa. The existence of income group effect is found with developed countries performing much better compared to developing countries. The study also recommended that countries should invest more of their wealth in human capital development components such as education and health to enhance their economic growth
- Full Text:
- Date Issued: 2020
- Authors: Sokanti, Thembalethu
- Date: 2020
- Subjects: Economic development Human capital
- Language: English
- Type: Thesis , Masters , MCom (Economics)
- Identifier: http://hdl.handle.net/10353/18985 , vital:43005
- Description: The study examined the impact of human capital development on economic growth for 129 countries comprising of developed and developing countries. The primary focus of the study is on examining the contribution of human capital index components on economic growth for the period 2014 to 2017. The panel data model was employed in the study. Firstly, the hausman test was used to determine the suitable method between fixed and random effects. The fixed effects model was selected as the best panel econometric technique to be used in the study. The empirical results showed that there is a positive and statistically significant relationship between human capital index components (capacity, development, deployment and know how) and economic growth. The study also found that these components of human capital index have more impact on economic growth when they are interacted together based on theories of human capital and economic growth. Capacity and development are found to be the best contributors to economic growth for all the regions; thus, the study recommends that for economic growth to be increased, countries should invest more of their funds on capacity and development sub- indexes of human capital index. Exchange rates and inflation are found to have a negative relationship with the economic growth, while interest rates are found to have a positive and statistical relationship with the economic growth. The study also found out that there is a regional effect associated with human capital development, with European region being the best contributor to GDP. The components of human capital index also found to be important for all regions to invest on to improve economic performance. Deployment is found not to be significant is Sub-Saharan Africa. The existence of income group effect is found with developed countries performing much better compared to developing countries. The study also recommended that countries should invest more of their wealth in human capital development components such as education and health to enhance their economic growth
- Full Text:
- Date Issued: 2020
The relative efficacy of liberation theology and critical solidarity in keeping the SACC to its goals of human welfare and Ecumenical unity in its relationship with the South African state
- Authors: Pongolo, Mziwamadoda
- Date: 2020
- Subjects: Black theology Liberation theology
- Language: English
- Type: Thesis , Masters
- Identifier: http://hdl.handle.net/10353/18269 , vital:42247
- Description: The problem that this study is grappling with is that since the SACC has followed the Critical Solidarity model it is less successful in meeting its goals, to support human welfare and ecumenical solidarity in South Africa. The research will compare the two respective models of relations between SACC and State, that which guided the SACC after the demise of Apartheid that which guided it. First, the research will investigate why the present relationship of Critical Solidarity has proven less effective in achieving its goals. Secondly it will investigate factors accounting for the relative success of the model of relations between SACC and the South African State during the struggle against apartheid, that of Liberation Theology. Secondly, this study will recommend the reconstruction of a more effective model of Critical Solidarity, to remedy present weaknesses, by incorporating factors from the apartheid-era model of Liberation Theology that which serve the goals of ecumenical solidarity and human welfare. The research seeks to address the following questions. What challenges, for the goals of the SACC, of ecumenical solidarity and human welfare, have arisen for the SACC that may be attributed to its adoption of a model of Critical Solidarity in its relationship with the State? What factors conducive to ecumenical solidarity and human welfare are absent from the present model of Critical Solidarity, though they present the preceding model of relations between Church and State as adopted adopted by the SACC during the struggle against apartheid, modeled on Liberation Theology? How might these factors conducive to Church unity and social justice in South Africa be reintroduced in the present model of Critical Solidarity
- Full Text:
- Date Issued: 2020
- Authors: Pongolo, Mziwamadoda
- Date: 2020
- Subjects: Black theology Liberation theology
- Language: English
- Type: Thesis , Masters
- Identifier: http://hdl.handle.net/10353/18269 , vital:42247
- Description: The problem that this study is grappling with is that since the SACC has followed the Critical Solidarity model it is less successful in meeting its goals, to support human welfare and ecumenical solidarity in South Africa. The research will compare the two respective models of relations between SACC and State, that which guided the SACC after the demise of Apartheid that which guided it. First, the research will investigate why the present relationship of Critical Solidarity has proven less effective in achieving its goals. Secondly it will investigate factors accounting for the relative success of the model of relations between SACC and the South African State during the struggle against apartheid, that of Liberation Theology. Secondly, this study will recommend the reconstruction of a more effective model of Critical Solidarity, to remedy present weaknesses, by incorporating factors from the apartheid-era model of Liberation Theology that which serve the goals of ecumenical solidarity and human welfare. The research seeks to address the following questions. What challenges, for the goals of the SACC, of ecumenical solidarity and human welfare, have arisen for the SACC that may be attributed to its adoption of a model of Critical Solidarity in its relationship with the State? What factors conducive to ecumenical solidarity and human welfare are absent from the present model of Critical Solidarity, though they present the preceding model of relations between Church and State as adopted adopted by the SACC during the struggle against apartheid, modeled on Liberation Theology? How might these factors conducive to Church unity and social justice in South Africa be reintroduced in the present model of Critical Solidarity
- Full Text:
- Date Issued: 2020
An Analysis of Career Discourses in Life Orientation Textbooks of Eastern Cape Schools
- Authors: Du Toit , Julie
- Date: 2019
- Subjects: Life skills Vocational guidance
- Language: English
- Type: Thesis , Masters , MSoc. Sci (Psychology)
- Identifier: http://hdl.handle.net/10353/17580 , vital:41101
- Description: Life Orientation (LO) was introduced in schools by the new ANC government post 1994. Its introduction provided a platform to re-introduce career guidance to learners in schools with the aim of assisting them in making well-versed choices regarding their prospective careers and the subject selections pertaining to them (Department of Basic Education, 2011). Although no previous studies in the LO arena have focused on career discourses, previous literature on career discourses, in general, suggests that the models and theories still employed today have been heavily influenced by Western individualistic values. This has been found to create a disconnect between the South African subjects and the context they exist in, rendering these discourses unable to provide substantive assistance in the career decision making process. This study seeks to determine whether the career discourses located in the selected texts speak to the subjectivity and agency of the learner to make informed decisions. The current study examined the career discourses present in the LO textbooks utilised in Eastern Cape schools. The study sampled LO textbooks from Grades 10-12, as this group of learners are preparing to make critical further studying and career decisions and require guidance in their decision making process. A social constructionist lens was applied to the study by means of a Foucauldian Discourse Analysis, making use of Willig’s (2013) six step process as a reference. Dominant discourses of the objective self, neoliberal self and the transitioning adolescent were uncovered in the texts, which suggests that, rather than challenge the dominant discourses that have prevailed in career theory and practice, the LO careers curriculum further reinforces them.
- Full Text:
- Date Issued: 2019
- Authors: Du Toit , Julie
- Date: 2019
- Subjects: Life skills Vocational guidance
- Language: English
- Type: Thesis , Masters , MSoc. Sci (Psychology)
- Identifier: http://hdl.handle.net/10353/17580 , vital:41101
- Description: Life Orientation (LO) was introduced in schools by the new ANC government post 1994. Its introduction provided a platform to re-introduce career guidance to learners in schools with the aim of assisting them in making well-versed choices regarding their prospective careers and the subject selections pertaining to them (Department of Basic Education, 2011). Although no previous studies in the LO arena have focused on career discourses, previous literature on career discourses, in general, suggests that the models and theories still employed today have been heavily influenced by Western individualistic values. This has been found to create a disconnect between the South African subjects and the context they exist in, rendering these discourses unable to provide substantive assistance in the career decision making process. This study seeks to determine whether the career discourses located in the selected texts speak to the subjectivity and agency of the learner to make informed decisions. The current study examined the career discourses present in the LO textbooks utilised in Eastern Cape schools. The study sampled LO textbooks from Grades 10-12, as this group of learners are preparing to make critical further studying and career decisions and require guidance in their decision making process. A social constructionist lens was applied to the study by means of a Foucauldian Discourse Analysis, making use of Willig’s (2013) six step process as a reference. Dominant discourses of the objective self, neoliberal self and the transitioning adolescent were uncovered in the texts, which suggests that, rather than challenge the dominant discourses that have prevailed in career theory and practice, the LO careers curriculum further reinforces them.
- Full Text:
- Date Issued: 2019
An evaluation of social team building intervention on MBA group formation
- Authors: Westraadt, Johan Ewald
- Date: 2019
- Subjects: Team learning approach in education , Business Administration -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/45679 , vital:38926
- Description: Teamwork and the ability to work effectively in a team is a critical skill in a technologically complex workplace where no individual can possess all the knowledge and skills. MBA programmes, therefore, require students to work in collaborative learning groups in order to not only share their knowledge and skills, but also to develop the needed team-based competencies. However, collaborative learning groups are prone to many pitfalls that could result in intra-group conflict and inefficiencies such as social loafing, where the group performance is less than the sum of the output of the individual members when working alone. Team development interventions (TDI) aim to improve team-based competencies of a team. One type of TDI that is often employed is social team building. It typically consists of a one-day extra-mural excursion involving some non-work-related tasks performed by teams to improve interpersonal relationships. The MBA groups are pre-allocated at the start of the academic programme and team building interventions are therefore needed to facilitate group formation. The main research question in this study deals with the effectiveness of these social team building TDI’s to promote group formation. The literature of teams and the factors that influence team effectivity were reviewed. Input-Process-Output models relate the factors that drive team performance. Three team viability measures critical to a teams’ performance were identified namely, group cohesion, group communication and goal-setting. There is strong empirical evidence that these factors contribute positively to the performance of the team. The influence of team building interventions on each of these factors were discussed. There is empirical evidence for the impact of team building interventions on these affective outcomes. However, empirical evidence for the link to objective performance measures is still lacking
- Full Text:
- Date Issued: 2019
- Authors: Westraadt, Johan Ewald
- Date: 2019
- Subjects: Team learning approach in education , Business Administration -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/45679 , vital:38926
- Description: Teamwork and the ability to work effectively in a team is a critical skill in a technologically complex workplace where no individual can possess all the knowledge and skills. MBA programmes, therefore, require students to work in collaborative learning groups in order to not only share their knowledge and skills, but also to develop the needed team-based competencies. However, collaborative learning groups are prone to many pitfalls that could result in intra-group conflict and inefficiencies such as social loafing, where the group performance is less than the sum of the output of the individual members when working alone. Team development interventions (TDI) aim to improve team-based competencies of a team. One type of TDI that is often employed is social team building. It typically consists of a one-day extra-mural excursion involving some non-work-related tasks performed by teams to improve interpersonal relationships. The MBA groups are pre-allocated at the start of the academic programme and team building interventions are therefore needed to facilitate group formation. The main research question in this study deals with the effectiveness of these social team building TDI’s to promote group formation. The literature of teams and the factors that influence team effectivity were reviewed. Input-Process-Output models relate the factors that drive team performance. Three team viability measures critical to a teams’ performance were identified namely, group cohesion, group communication and goal-setting. There is strong empirical evidence that these factors contribute positively to the performance of the team. The influence of team building interventions on each of these factors were discussed. There is empirical evidence for the impact of team building interventions on these affective outcomes. However, empirical evidence for the link to objective performance measures is still lacking
- Full Text:
- Date Issued: 2019
Ex-offenders' perceptions towards their sexual victimisation during incarceration : a case study of Sinthumule area under Makhado Local Municipality: Limpopo Province
- Tshidada, Thifulufhelwi Cedric
- Authors: Tshidada, Thifulufhelwi Cedric
- Date: 2018
- Subjects: Prisoners--Sexual behavior Criminals--Rehabilitation
- Language: English
- Type: Thesis , Masters , Criminology
- Identifier: http://hdl.handle.net/10353/17771 , vital:41199
- Description: The study aimed to investigate or to explore offenders’ perceptions on sexual assault within or during their incarceration in Makhado Correctional Centre. For the purpose of this study, the researcher is inclined to use qualitative research method because many it allows respondents to express their feelings. This is phenomenological in the sense that the researcher aimed to describe the experiences of the participants. In an attempt to resolve the research problem, the study embarked on qualitative method to guide the in depth structured interviews questions with the offenders about their experience on sexual assault during their incarceration. The researcher employed the method of field study in data collection in a natural settings or environments. The data collected were based on the research questions to establish the causes and consequences of sexual assaults and reasons why the victims are so lackadaisical in reporting sexual assaults to the authorities. Therefore, this study used the purposive sampling method to select participants. The data collection method for this research is an in-depth structured interview. In-depth interviews were repeated face-to-face between the researcher and participants in order to give the participants an opportunity to establish a better understanding. For the purpose of data analysis this study made use of content analysis which is a recommended method in qualitative study.
- Full Text:
- Date Issued: 2018
- Authors: Tshidada, Thifulufhelwi Cedric
- Date: 2018
- Subjects: Prisoners--Sexual behavior Criminals--Rehabilitation
- Language: English
- Type: Thesis , Masters , Criminology
- Identifier: http://hdl.handle.net/10353/17771 , vital:41199
- Description: The study aimed to investigate or to explore offenders’ perceptions on sexual assault within or during their incarceration in Makhado Correctional Centre. For the purpose of this study, the researcher is inclined to use qualitative research method because many it allows respondents to express their feelings. This is phenomenological in the sense that the researcher aimed to describe the experiences of the participants. In an attempt to resolve the research problem, the study embarked on qualitative method to guide the in depth structured interviews questions with the offenders about their experience on sexual assault during their incarceration. The researcher employed the method of field study in data collection in a natural settings or environments. The data collected were based on the research questions to establish the causes and consequences of sexual assaults and reasons why the victims are so lackadaisical in reporting sexual assaults to the authorities. Therefore, this study used the purposive sampling method to select participants. The data collection method for this research is an in-depth structured interview. In-depth interviews were repeated face-to-face between the researcher and participants in order to give the participants an opportunity to establish a better understanding. For the purpose of data analysis this study made use of content analysis which is a recommended method in qualitative study.
- Full Text:
- Date Issued: 2018
The audit committee’s role in preventing corporate governance failure within state owned enterprises
- Authors: Mbatha, Feziwe
- Date: 2018
- Subjects: Government business enterprises , Corporate governance -- South Africa , Audit committees -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/32311 , vital:32015
- Description: Widespread reports of the poor governance within the State-Owned Enterprises (SOEs) has proliferated the media in South Africa over recent years. This progressive decline of governance structures has raised varied concerns, most of which are expressed as questions of note. For example, questions exist about the reasons why laws, regulations and policies that aim to ensure effective corporate governance practices have largely been ignored. Secondly, questions exist about the identities of those employees / executives within these enterprises, who are responsible for ensuring that good corporate governance practices are maintained within an organisation. Similarly, there is need to clarify the role of the audit committees in upholding good corporate governance practices within SOEs? This study aims to identify, describe and clarify the role(s) of the audit committee in preventing corporate governance failures within SOEs. A qualitative research methodology was utilised as the basis for collating data to develop an in depth understanding of the audit committee’s oversight responsibility within SOEs. In-depth individual interviews (n=6) were conducted with board members as well as members of the audit committee of a specifically selected SOE that had a history of compromised corporate governance practices and suffered severe financial losses. From the interpretation of the collated data, it was noted that the presence of a strong audit committee enables a more accountable environment that requires senior management to account for their actions openly and transparently. SOEs need to appreciate corporate governance as an asset to a company’s operations rather than as a poorly rationalised compliance requirement.
- Full Text:
- Date Issued: 2018
The audit committee’s role in preventing corporate governance failure within state owned enterprises
- Authors: Mbatha, Feziwe
- Date: 2018
- Subjects: Government business enterprises , Corporate governance -- South Africa , Audit committees -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/32311 , vital:32015
- Description: Widespread reports of the poor governance within the State-Owned Enterprises (SOEs) has proliferated the media in South Africa over recent years. This progressive decline of governance structures has raised varied concerns, most of which are expressed as questions of note. For example, questions exist about the reasons why laws, regulations and policies that aim to ensure effective corporate governance practices have largely been ignored. Secondly, questions exist about the identities of those employees / executives within these enterprises, who are responsible for ensuring that good corporate governance practices are maintained within an organisation. Similarly, there is need to clarify the role of the audit committees in upholding good corporate governance practices within SOEs? This study aims to identify, describe and clarify the role(s) of the audit committee in preventing corporate governance failures within SOEs. A qualitative research methodology was utilised as the basis for collating data to develop an in depth understanding of the audit committee’s oversight responsibility within SOEs. In-depth individual interviews (n=6) were conducted with board members as well as members of the audit committee of a specifically selected SOE that had a history of compromised corporate governance practices and suffered severe financial losses. From the interpretation of the collated data, it was noted that the presence of a strong audit committee enables a more accountable environment that requires senior management to account for their actions openly and transparently. SOEs need to appreciate corporate governance as an asset to a company’s operations rather than as a poorly rationalised compliance requirement.
- Full Text:
- Date Issued: 2018
A case study of the cost and causes of the Tongaat mall accident in Durban
- Authors: Van Eeden, Leonarda
- Date: 2017
- Subjects: Construction industry -- Accidents -- South Africa -- Durban Construction industry -- Safety regulations -- South Africa -- KwaZulu-Natal , Building sites -- Risk assessment
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/45464 , vital:38619
- Description: The literature shows that building collapses occur due to either management or operational failure. This Dissertation presents the causes of building collapse linked to management and operational lapses. A case study research on the Tongaat mall collapse in November 2013 forms the basis for the research. Through data collection that entails content analysis of official inquiry into the collapse and subsequent semi-structured face-to-face interviews among the participants in the collapsed building, major failures were identified. Salient findings show that the regulatory functions on the building project were compromised, and the inability to ensure that the project fulfils all enforcement and compliance requirements significantly enhances the existence of a work environment that led to two fatalities and 29 injuries. This study corroborates past findings that have flagged implementation as the weak link of H&S management in terms of construction regulations in South Africa. In other words, the benefits of adequate policies on paper can only emerge through applications on construction sites.
- Full Text:
- Date Issued: 2017
- Authors: Van Eeden, Leonarda
- Date: 2017
- Subjects: Construction industry -- Accidents -- South Africa -- Durban Construction industry -- Safety regulations -- South Africa -- KwaZulu-Natal , Building sites -- Risk assessment
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/45464 , vital:38619
- Description: The literature shows that building collapses occur due to either management or operational failure. This Dissertation presents the causes of building collapse linked to management and operational lapses. A case study research on the Tongaat mall collapse in November 2013 forms the basis for the research. Through data collection that entails content analysis of official inquiry into the collapse and subsequent semi-structured face-to-face interviews among the participants in the collapsed building, major failures were identified. Salient findings show that the regulatory functions on the building project were compromised, and the inability to ensure that the project fulfils all enforcement and compliance requirements significantly enhances the existence of a work environment that led to two fatalities and 29 injuries. This study corroborates past findings that have flagged implementation as the weak link of H&S management in terms of construction regulations in South Africa. In other words, the benefits of adequate policies on paper can only emerge through applications on construction sites.
- Full Text:
- Date Issued: 2017
Population genomics analysis of yellowfin tuna Thunnus albacares off South Africa reveals need for a shifted management boundary
- Authors: Mullins, Rachel Brenna
- Date: 2017
- Subjects: Yellowfin tuna fisheries -- South Africa -- Western Cape , Genomics , Tuna fisheries -- South Africa , Fishery management -- South Africa
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/57819 , vital:26992
- Description: Yellowfin tuna Thunnus albacares is a commercially and economically important fisheries species, which comprises the second largest component of South Africa’s catch of tuna and tuna-like species. Catches of the species off South Africa are treated as two discrete stocks by the two tuna Regional Fisheries Management Organisations (tRFMOs) under whose jurisdictions they fall. Individuals caught off the Western Cape, west of the boundary between the tRFMOs at 20°E, are included in assessment and management of the Atlantic Ocean yellowfin tuna stock by the International Commission for the Conservation of Atlantic Tunas (ICCAT), and those caught east of this boundary are assessed and managed as part of the Indian Ocean stock by the Indian Ocean Tuna Commission (IOTC). The boundary between these stocks is based on the confluence of the two oceans in this region and does not incorporate the population structure of species. For sustainable exploitation of fisheries resources, it is important that the definition of management stocks reflects species’ biological population structure; the fine-scale stock structure of yellowfin tuna off South Africa is therefore a research priority which this study aimed to address by means of population genomics analyses. Yellowfin tuna exhibit shallow genetic differentiation over wide geographic areas, and as such traditional population genetic approaches have limited power in resolving fishery significant population structure in the species. Herein, a population genomic approach was employed, specifically, genome-wide analysis of single nucleotide polymorphisms (SNPs) discovered using a next-generation DNA sequencing approach, to confer (i) increased statistical power to detect neutral structuring reflecting population connectivity patterns and (ii) signatures of local adaptation. The mitochondrial Control Region (mtDNA CR) was also sequenced to compare the resolving power of different approaches and to permit coalescent based analyses of the species evolutionary history in the region. Neutral SNP loci revealed significant structure within the dataset (Fst=0.0043; P<0.0001); partitioning of this differentiation within the dataset indicated significant differentiation between yellowfin tuna from the Western Cape and the Gulf of Guinea in the eastern Atlantic Ocean, with no significant differentiation between individuals from the Western Cape and Western Indian Ocean regions. This indicates two population units wherein there is a separation of the Gulf of Guinea from the remaining samples (Indian Ocean including Western Cape) that are largely derived from a single genetic population. This pattern was also supported by assignment tests. Positive outlier SNPs, exhibiting signatures of diversifying selection, suggest that individuals from these regions may be locally adapted, as well as demographically isolated. The mtDNA CR did not reveal any significant genetic structure among samples (Fst=0.0030; P=0.309), demonstrating the increased resolving power provided by population genomics approaches, but revealed signatures of historical demographic fluctuations associated with glacial cycles. Based on the findings of this study, it is suggested that yellowfin tuna caught off the Western Cape of South Africa are migrants from the Indian Ocean population, exhibiting significant genetic differentiation from the Atlantic Ocean Gulf of Guinea individuals, and should thus be included in the assessment and management of the Indian Ocean stock. It is therefore recommended that the boundary between the Atlantic and Indian Ocean yellowfin tuna stocks, under the mandates of ICCAT and the IOTC respectively, should be shifted to approximately 13.35°E to include all individuals caught in South African waters in the Indian Ocean stock.
- Full Text:
- Date Issued: 2017
- Authors: Mullins, Rachel Brenna
- Date: 2017
- Subjects: Yellowfin tuna fisheries -- South Africa -- Western Cape , Genomics , Tuna fisheries -- South Africa , Fishery management -- South Africa
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/57819 , vital:26992
- Description: Yellowfin tuna Thunnus albacares is a commercially and economically important fisheries species, which comprises the second largest component of South Africa’s catch of tuna and tuna-like species. Catches of the species off South Africa are treated as two discrete stocks by the two tuna Regional Fisheries Management Organisations (tRFMOs) under whose jurisdictions they fall. Individuals caught off the Western Cape, west of the boundary between the tRFMOs at 20°E, are included in assessment and management of the Atlantic Ocean yellowfin tuna stock by the International Commission for the Conservation of Atlantic Tunas (ICCAT), and those caught east of this boundary are assessed and managed as part of the Indian Ocean stock by the Indian Ocean Tuna Commission (IOTC). The boundary between these stocks is based on the confluence of the two oceans in this region and does not incorporate the population structure of species. For sustainable exploitation of fisheries resources, it is important that the definition of management stocks reflects species’ biological population structure; the fine-scale stock structure of yellowfin tuna off South Africa is therefore a research priority which this study aimed to address by means of population genomics analyses. Yellowfin tuna exhibit shallow genetic differentiation over wide geographic areas, and as such traditional population genetic approaches have limited power in resolving fishery significant population structure in the species. Herein, a population genomic approach was employed, specifically, genome-wide analysis of single nucleotide polymorphisms (SNPs) discovered using a next-generation DNA sequencing approach, to confer (i) increased statistical power to detect neutral structuring reflecting population connectivity patterns and (ii) signatures of local adaptation. The mitochondrial Control Region (mtDNA CR) was also sequenced to compare the resolving power of different approaches and to permit coalescent based analyses of the species evolutionary history in the region. Neutral SNP loci revealed significant structure within the dataset (Fst=0.0043; P<0.0001); partitioning of this differentiation within the dataset indicated significant differentiation between yellowfin tuna from the Western Cape and the Gulf of Guinea in the eastern Atlantic Ocean, with no significant differentiation between individuals from the Western Cape and Western Indian Ocean regions. This indicates two population units wherein there is a separation of the Gulf of Guinea from the remaining samples (Indian Ocean including Western Cape) that are largely derived from a single genetic population. This pattern was also supported by assignment tests. Positive outlier SNPs, exhibiting signatures of diversifying selection, suggest that individuals from these regions may be locally adapted, as well as demographically isolated. The mtDNA CR did not reveal any significant genetic structure among samples (Fst=0.0030; P=0.309), demonstrating the increased resolving power provided by population genomics approaches, but revealed signatures of historical demographic fluctuations associated with glacial cycles. Based on the findings of this study, it is suggested that yellowfin tuna caught off the Western Cape of South Africa are migrants from the Indian Ocean population, exhibiting significant genetic differentiation from the Atlantic Ocean Gulf of Guinea individuals, and should thus be included in the assessment and management of the Indian Ocean stock. It is therefore recommended that the boundary between the Atlantic and Indian Ocean yellowfin tuna stocks, under the mandates of ICCAT and the IOTC respectively, should be shifted to approximately 13.35°E to include all individuals caught in South African waters in the Indian Ocean stock.
- Full Text:
- Date Issued: 2017
Sustainable tourism opportunities for Mauritius
- Authors: Ternel, Maeva
- Date: 2017
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/6118 , vital:21046
- Description: Sustainable Tourism (ST) integrates governance, economic, socio-cultural and environmental dimensions of tourism in tourism development and management. Growing Environmental, Social and Governance (ESG) concerns suggest that traditionally, tourism tends to corrupt the very resources it needs to thrive, and thus its sustainability over the long haul has become of general concern. However, despite the vast and extensive literature dedicated to ST, including preeminent journals providing both a theoretical base and reliable empirical evidence to the subject, the concept of sustainability in tourism remains somehow at its embryonic stage, especially in the case of a small island developing state (SIDS). The research occurred within the context of the destination (Mauritius), with however, a focus on five sizeable Mauritian hotel groups. With tourism being one of the pillars of the Mauritian economy, this research intended to explore the different repercussions of such an industry. The aim of the research was to determine to what extent tourism’s operations and development, was appropriately managed in Mauritius by assessing the country’s current tourism situation relating to sustainability and identifying priority areas for intervention. This, was done using different tools, including the United Nations World Tourism Organisation's framework, the Global Sustainable Tourism Council's guidelines and the Sustainable Tourism Attitude Scale. The contribution this research intended to make was to suggest sustainable tourism opportunities and make recommendations for the tourism sector and its stakeholders for the island of Mauritius. Overall, the research concluded that despite the increased importance of ST, the need for Managed Tourism (MT) and the formulation of general principles and guidelines, tourism governance; poverty reduction; and the sustainability of the natural and cultural environment were identified as areas of particular need and should be considered with high priority for intervention/action.
- Full Text:
- Date Issued: 2017
- Authors: Ternel, Maeva
- Date: 2017
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/6118 , vital:21046
- Description: Sustainable Tourism (ST) integrates governance, economic, socio-cultural and environmental dimensions of tourism in tourism development and management. Growing Environmental, Social and Governance (ESG) concerns suggest that traditionally, tourism tends to corrupt the very resources it needs to thrive, and thus its sustainability over the long haul has become of general concern. However, despite the vast and extensive literature dedicated to ST, including preeminent journals providing both a theoretical base and reliable empirical evidence to the subject, the concept of sustainability in tourism remains somehow at its embryonic stage, especially in the case of a small island developing state (SIDS). The research occurred within the context of the destination (Mauritius), with however, a focus on five sizeable Mauritian hotel groups. With tourism being one of the pillars of the Mauritian economy, this research intended to explore the different repercussions of such an industry. The aim of the research was to determine to what extent tourism’s operations and development, was appropriately managed in Mauritius by assessing the country’s current tourism situation relating to sustainability and identifying priority areas for intervention. This, was done using different tools, including the United Nations World Tourism Organisation's framework, the Global Sustainable Tourism Council's guidelines and the Sustainable Tourism Attitude Scale. The contribution this research intended to make was to suggest sustainable tourism opportunities and make recommendations for the tourism sector and its stakeholders for the island of Mauritius. Overall, the research concluded that despite the increased importance of ST, the need for Managed Tourism (MT) and the formulation of general principles and guidelines, tourism governance; poverty reduction; and the sustainability of the natural and cultural environment were identified as areas of particular need and should be considered with high priority for intervention/action.
- Full Text:
- Date Issued: 2017
Exploring the influence of learners’ participation in an after-school science enrichment programme on their disposition towards science: a case study of Khanya Maths and Science Club
- Authors: Agunbiade, Esther Arinola
- Date: 2016
- Subjects: Mathematics -- Study and teaching Science -- Study and teaching After-school programs Academic achievement
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/334 , vital:19949
- Description: The ongoing advancement of science and technology is creating an increasing need for more entrants into science oriented careers. However, numerous studies have fueled growing concerns regarding the poor achievement of learners in science. Over the years, science education researchers have emphasized the importance of the affective domain of learning as a central component of strategies used to address learners’ lack of interest and poor achievement in science. In the literature, the affective domain is characterized by constructs such as disposition, attitude, interest, and motivation. Studies showing a correlation between the affective domain and academic achievement suggest that nurturing a positive disposition towards science is an antecedent to learners’ improved science achievement and entering science fields. This study focuses on the ‘disposition’ aspect of the affective domain, and follows in the path of earlier studies which use the term interchangeably with ‘attitude’. Learners’ experiences in a particular science education environment influence the development of a positive or negative disposition towards science. However, there is a need to explore the factors in the learning environments which influence learners’ disposition towards science. Previous studies have shown that the informal science environment may influence learners’ disposition towards science. One example of an informal science environment is the Khanya Maths and Science Club, which is an after-school science and mathematics enrichment programme in Grahamstown, South Africa. This study explores the influence of learners’ participation in an informal science education environment on their dispositions towards science, using the case of the Khanya Maths and Science Club. This study views disposition through the constructivist-developmental lens. The community of practice elements from situated learning theory is drawn on to explore how learners’ disposition can be influenced by their interactions in the context of the Khanya Maths and Science Club. The pragmatic paradigm is adopted, which considers how well the research tools work to provide answers to the research questions. This thus, provides an avenue for exploring how learners’ disposition towards science is influenced and what factors influenced their shift in disposition through their participation in the club. A mixed-methods approach is employed when focusing on the affective domain sub-constructs of: enjoyment of science, interest in science and perception of science. These are sub-scales in the test of science related attitude (TOSRA) questionnaire which was adapted for use in measuring learners’ attitude before and after 16 weeks of participating in the science club. The particular mixed-methods approach selected can be summarized as quan QUAL since the method is primarily qualitative, but sequential with the quantitative phase preceding the qualitative phase. The TOSRA questionnaire was used as the quantitative data collection instrument while semi-structured interviews and learners’ journal entries were the qualitative data collection instruments. The results revealed significant shifts in learners’ perception of, interest in science and enjoyment of science though interest in science and enjoyment of science shifted appreciably in a positive direction more than the perception of science. It was also found that learners’ attitude towards science was influenced by; instructional characteristics, facilitators/environmental characteristics, learners making connection between science and everyday life and learners’ perceived difficulty of science. These factors variably influenced their attitude towards science in the club, corroborating what had been found in similar studies. This study corroborates what the literature offers for achieving effective outcomes in Afterschool science enrichment programmes. It contributes to the growing body of literature on features for quality outcomes in Afterschool science enrichment programmes. This study also makes a theoretical contribution to science education research particularly with regard to how the emergence of a community of practice framework in the club activities provide useful information for planning club activities and the analysis of learners’ evolving disposition towards science. Key words: Khanya Maths and Science Club, disposition, attitude, after-school enrichment programmes, constructivist-developmental approach, situated learning theory, community of practice, Test of Science Related Attitude (TOSRA).
- Full Text:
- Date Issued: 2016
- Authors: Agunbiade, Esther Arinola
- Date: 2016
- Subjects: Mathematics -- Study and teaching Science -- Study and teaching After-school programs Academic achievement
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/334 , vital:19949
- Description: The ongoing advancement of science and technology is creating an increasing need for more entrants into science oriented careers. However, numerous studies have fueled growing concerns regarding the poor achievement of learners in science. Over the years, science education researchers have emphasized the importance of the affective domain of learning as a central component of strategies used to address learners’ lack of interest and poor achievement in science. In the literature, the affective domain is characterized by constructs such as disposition, attitude, interest, and motivation. Studies showing a correlation between the affective domain and academic achievement suggest that nurturing a positive disposition towards science is an antecedent to learners’ improved science achievement and entering science fields. This study focuses on the ‘disposition’ aspect of the affective domain, and follows in the path of earlier studies which use the term interchangeably with ‘attitude’. Learners’ experiences in a particular science education environment influence the development of a positive or negative disposition towards science. However, there is a need to explore the factors in the learning environments which influence learners’ disposition towards science. Previous studies have shown that the informal science environment may influence learners’ disposition towards science. One example of an informal science environment is the Khanya Maths and Science Club, which is an after-school science and mathematics enrichment programme in Grahamstown, South Africa. This study explores the influence of learners’ participation in an informal science education environment on their dispositions towards science, using the case of the Khanya Maths and Science Club. This study views disposition through the constructivist-developmental lens. The community of practice elements from situated learning theory is drawn on to explore how learners’ disposition can be influenced by their interactions in the context of the Khanya Maths and Science Club. The pragmatic paradigm is adopted, which considers how well the research tools work to provide answers to the research questions. This thus, provides an avenue for exploring how learners’ disposition towards science is influenced and what factors influenced their shift in disposition through their participation in the club. A mixed-methods approach is employed when focusing on the affective domain sub-constructs of: enjoyment of science, interest in science and perception of science. These are sub-scales in the test of science related attitude (TOSRA) questionnaire which was adapted for use in measuring learners’ attitude before and after 16 weeks of participating in the science club. The particular mixed-methods approach selected can be summarized as quan QUAL since the method is primarily qualitative, but sequential with the quantitative phase preceding the qualitative phase. The TOSRA questionnaire was used as the quantitative data collection instrument while semi-structured interviews and learners’ journal entries were the qualitative data collection instruments. The results revealed significant shifts in learners’ perception of, interest in science and enjoyment of science though interest in science and enjoyment of science shifted appreciably in a positive direction more than the perception of science. It was also found that learners’ attitude towards science was influenced by; instructional characteristics, facilitators/environmental characteristics, learners making connection between science and everyday life and learners’ perceived difficulty of science. These factors variably influenced their attitude towards science in the club, corroborating what had been found in similar studies. This study corroborates what the literature offers for achieving effective outcomes in Afterschool science enrichment programmes. It contributes to the growing body of literature on features for quality outcomes in Afterschool science enrichment programmes. This study also makes a theoretical contribution to science education research particularly with regard to how the emergence of a community of practice framework in the club activities provide useful information for planning club activities and the analysis of learners’ evolving disposition towards science. Key words: Khanya Maths and Science Club, disposition, attitude, after-school enrichment programmes, constructivist-developmental approach, situated learning theory, community of practice, Test of Science Related Attitude (TOSRA).
- Full Text:
- Date Issued: 2016
Marie Curie : a psychobiography
- Authors: Roets, Elmeret
- Date: 2016
- Subjects: Curie, Marie -- 1867-1934 -- Psychology , Women chemists -- Poland -- Biography , Scientists -- Biography
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3269 , http://hdl.handle.net/10962/d1020326
- Description: While researchers debate the value of psychobiographical research, interest in this area is growing on a national and international basis. Every year, the number of psychobiographical studies at universities in South Africa is growing. Psychobiographical research is qualitative research that utilises psychological theory to explore and describe the lives of extraordinary individuals. The primary aim of this psychobiography was to examine the life of Marie Curie (1867–1934) by employing developmental psychologist and psychoanalyst Erik Erikson’s (1959) theory of psychosocial personality development. Marie Curie was chosen as the research subject because of the researcher’s personal interest and the subject’s prominence as a female scientist. She was a Polish-born and naturalised French scientist who conducted pioneering research on radioactivity. Marie Curie’s ground-breaking discoveries changed the way scientists think about matter and energy and introduced a new era in medical knowledge and the treatment of disease. Her life exemplifies a love of science, commitment, and perseverance. Data were collected from several primary and secondary sources on Marie Curie’s life. The researcher developed a data-collection and analysis matrix to facilitate the systematic collection of data and analysis according to Erikson’s stage theory of psychosocial personality development. This psychobiography suggests that unresolved infantile and early childhood crises gave rise to personality traits that eventually contributed to Curie’s extraordinariness. In the case of Curie, personality traits that are often regarded as atypical or malignant, ironically encouraged perseverance, creativity, and productivity. This study complements the psychobiographical studies done in South Africa on extraordinary individuals. It demonstrated the value of psychobiographical research as a teaching instrument, revealed the usefulness of Erikson’s theory, and illustrated the uniqueness of individuals.
- Full Text:
- Date Issued: 2016
- Authors: Roets, Elmeret
- Date: 2016
- Subjects: Curie, Marie -- 1867-1934 -- Psychology , Women chemists -- Poland -- Biography , Scientists -- Biography
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3269 , http://hdl.handle.net/10962/d1020326
- Description: While researchers debate the value of psychobiographical research, interest in this area is growing on a national and international basis. Every year, the number of psychobiographical studies at universities in South Africa is growing. Psychobiographical research is qualitative research that utilises psychological theory to explore and describe the lives of extraordinary individuals. The primary aim of this psychobiography was to examine the life of Marie Curie (1867–1934) by employing developmental psychologist and psychoanalyst Erik Erikson’s (1959) theory of psychosocial personality development. Marie Curie was chosen as the research subject because of the researcher’s personal interest and the subject’s prominence as a female scientist. She was a Polish-born and naturalised French scientist who conducted pioneering research on radioactivity. Marie Curie’s ground-breaking discoveries changed the way scientists think about matter and energy and introduced a new era in medical knowledge and the treatment of disease. Her life exemplifies a love of science, commitment, and perseverance. Data were collected from several primary and secondary sources on Marie Curie’s life. The researcher developed a data-collection and analysis matrix to facilitate the systematic collection of data and analysis according to Erikson’s stage theory of psychosocial personality development. This psychobiography suggests that unresolved infantile and early childhood crises gave rise to personality traits that eventually contributed to Curie’s extraordinariness. In the case of Curie, personality traits that are often regarded as atypical or malignant, ironically encouraged perseverance, creativity, and productivity. This study complements the psychobiographical studies done in South Africa on extraordinary individuals. It demonstrated the value of psychobiographical research as a teaching instrument, revealed the usefulness of Erikson’s theory, and illustrated the uniqueness of individuals.
- Full Text:
- Date Issued: 2016
A preliminary study on the effects of elevated CO2 on aphid resistance of Tugela Dn and the population dynamics of the Russian wheat aphid (Homoptera: Aphididae), Diuraphis noxia
- Authors: Mundondo, Daphine
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Biochemistry)
- Identifier: vital:11402 , http://hdl.handle.net/10353/d1020244
- Description: Food security is of major importance due to the increasing world population with 8.9 billion people expected by 2050 (Cohen, 2003). Diuraphis noxia (RWA), have caused aggravating, massive losses to wheat farmers in many areas of the world. If unchecked, RWA are able to destroy plants resulting in major economic impacts (Botha, 2013). Due to ineffective use of other control methods, the Small Grains Institute in Bethlehem, South Africa, have therefore developed resistant cultivars to the known RWA subtypes over the past decades through intensive breeding programmes (Tolmay et al., 2006). Climate change has however become a major factor threatening food security especially with the observed increase in CO2 from less than 300 ppm in pre-industrial period to the current 385 ppm and is predicted to reach 550 ppm by 2050 (IPCC, 2007; Meehl et al., 2007). Elevated CO2 concentration may affect individual species of a community hence the need to understand the wheat-aphid interactions. In this study, population growth rates and virulence of RWA SA1 at ambient (385 ppm) and elevated (450 ppm) CO2 concentration were evaluated on two wheat cultivars: Tugela Dn (resistant) and Scheepers (susceptible). Fluorescence microscopy techniques using aniline blue were used to investigate feeding related damage caused by RWA SA1 through an examination of callose deposition at the two CO2 concentration. A two-dimensional gel electrophoresis method was developed in order to determine the effect of RWA SA1 on the wheat cultivars proteome at the two CO2 concentration. Differentially expressed proteins that were up or down regulated more than two fold were identified using PDQuestTM Basic 2D Gel analysis software. Populations of RWA SA1 increased significantly on the two wheat cultivars at both CO2 concentration. Although the population growth rate for RWA SA1 on both cultivars was generally exponential at all treatments, growth at elevated CO2 concentration was noticeably faster with populations increasing 3 fold in 14 days as compared to the 2 times at ambient CO2 concentration. Hence, both cultivars provided a better quality host for RWA SA1 at 450 ppm than 385 ppm. There was no significant difference between RWA SA1 population on Tugela Dn and on Scheepers at elevated CO2 concentration on day 14 after infestation which means there was a change in the resistance mechanism in Tugela Dn at this condition. Approximately 70% of the total leaf showed chlorosis by 21 days of aphid infestation for both cultivars although the susceptible cultivar was more vulnerable. There was low callose deposition in the controls (uninfested plants) but heavy callose in infested plants due to aphid feeding. A proteomics approach was used as a pilot study to investigate whether it would be possible to identify the changes in the resistance mechanism during aphid infestation under elevated CO2 levels. The major changes in the proteome of the control group (uninfested Tugela Dn at ambient versus elevated CO2 concentration) occurred in the early events (day 1-7) in the molecular weight range of approximately 25 kDa to 55 kDa are mainly within the basic to neutral pH range. This was suggested to be a result of mechanisms to adjust to the CO2 concentration. Elevated CO2 results in instant higher photosynthetic rates and C:N ratios as well as changes in expression levels of SA-dependant defense genes (Lindroth 1995; Hughes and Bazzaz, 2001; Sun et al., 2013). Because most of these changes are directly regulated by proteins, it is expected that the most differential protein expression will occur immediately after the atmospheric changes (early events) as was shown in the study. Infested plants under elevated and ambient conditions showed that the stress conditions gave rise to differentially regulated proteins within the wheat proteome. Most changes occurred elevated CO2 levels. It can be suggested that the changes were a result of differentially regulated plant defence proteins which fall in this range (25 kDa - 80 kDa) such as peroxidases, chitinases and β-1.3-glucanases as well as protein kinases, heat-shock proteins and photosynthetic proteins. These results indicate that there has been changes in the resistance due to elevated CO2 because of the evident changes in the proteome. If so, then the results will be similar to those documented by Louw (2007) where up-regulation was due to putative storage proteins, proteins involved in photosynthesis, heat shock proteins and defense proteins. Of course, the pI value and molecular mass of the proteins and the identification of the proteins in these spots, must be determined in future work to specifically identify whether these suggestions are authentic. However, Louw (2007) also reports that the susceptible Betta wheat cultivar, displayed a defence response similar to the HR although it was unable to up-regulate specific defensive proteins against RWA infestation but proteins for broad resistance. Although the changes in the proteins in infested Tugela Dn under elevated CO2 concentration were not accurately identified, the defense mechanism is similar to that portrayed by the susceptible Betta wheat cultivar which shows that the resistance mechanism had been overcome. Because this was a pilot study and preliminary results were obtained due to limited funding and time constraints, suggestions were made on how to further develop the method to obtain statistically significant results.
- Full Text:
- Date Issued: 2015
- Authors: Mundondo, Daphine
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Biochemistry)
- Identifier: vital:11402 , http://hdl.handle.net/10353/d1020244
- Description: Food security is of major importance due to the increasing world population with 8.9 billion people expected by 2050 (Cohen, 2003). Diuraphis noxia (RWA), have caused aggravating, massive losses to wheat farmers in many areas of the world. If unchecked, RWA are able to destroy plants resulting in major economic impacts (Botha, 2013). Due to ineffective use of other control methods, the Small Grains Institute in Bethlehem, South Africa, have therefore developed resistant cultivars to the known RWA subtypes over the past decades through intensive breeding programmes (Tolmay et al., 2006). Climate change has however become a major factor threatening food security especially with the observed increase in CO2 from less than 300 ppm in pre-industrial period to the current 385 ppm and is predicted to reach 550 ppm by 2050 (IPCC, 2007; Meehl et al., 2007). Elevated CO2 concentration may affect individual species of a community hence the need to understand the wheat-aphid interactions. In this study, population growth rates and virulence of RWA SA1 at ambient (385 ppm) and elevated (450 ppm) CO2 concentration were evaluated on two wheat cultivars: Tugela Dn (resistant) and Scheepers (susceptible). Fluorescence microscopy techniques using aniline blue were used to investigate feeding related damage caused by RWA SA1 through an examination of callose deposition at the two CO2 concentration. A two-dimensional gel electrophoresis method was developed in order to determine the effect of RWA SA1 on the wheat cultivars proteome at the two CO2 concentration. Differentially expressed proteins that were up or down regulated more than two fold were identified using PDQuestTM Basic 2D Gel analysis software. Populations of RWA SA1 increased significantly on the two wheat cultivars at both CO2 concentration. Although the population growth rate for RWA SA1 on both cultivars was generally exponential at all treatments, growth at elevated CO2 concentration was noticeably faster with populations increasing 3 fold in 14 days as compared to the 2 times at ambient CO2 concentration. Hence, both cultivars provided a better quality host for RWA SA1 at 450 ppm than 385 ppm. There was no significant difference between RWA SA1 population on Tugela Dn and on Scheepers at elevated CO2 concentration on day 14 after infestation which means there was a change in the resistance mechanism in Tugela Dn at this condition. Approximately 70% of the total leaf showed chlorosis by 21 days of aphid infestation for both cultivars although the susceptible cultivar was more vulnerable. There was low callose deposition in the controls (uninfested plants) but heavy callose in infested plants due to aphid feeding. A proteomics approach was used as a pilot study to investigate whether it would be possible to identify the changes in the resistance mechanism during aphid infestation under elevated CO2 levels. The major changes in the proteome of the control group (uninfested Tugela Dn at ambient versus elevated CO2 concentration) occurred in the early events (day 1-7) in the molecular weight range of approximately 25 kDa to 55 kDa are mainly within the basic to neutral pH range. This was suggested to be a result of mechanisms to adjust to the CO2 concentration. Elevated CO2 results in instant higher photosynthetic rates and C:N ratios as well as changes in expression levels of SA-dependant defense genes (Lindroth 1995; Hughes and Bazzaz, 2001; Sun et al., 2013). Because most of these changes are directly regulated by proteins, it is expected that the most differential protein expression will occur immediately after the atmospheric changes (early events) as was shown in the study. Infested plants under elevated and ambient conditions showed that the stress conditions gave rise to differentially regulated proteins within the wheat proteome. Most changes occurred elevated CO2 levels. It can be suggested that the changes were a result of differentially regulated plant defence proteins which fall in this range (25 kDa - 80 kDa) such as peroxidases, chitinases and β-1.3-glucanases as well as protein kinases, heat-shock proteins and photosynthetic proteins. These results indicate that there has been changes in the resistance due to elevated CO2 because of the evident changes in the proteome. If so, then the results will be similar to those documented by Louw (2007) where up-regulation was due to putative storage proteins, proteins involved in photosynthesis, heat shock proteins and defense proteins. Of course, the pI value and molecular mass of the proteins and the identification of the proteins in these spots, must be determined in future work to specifically identify whether these suggestions are authentic. However, Louw (2007) also reports that the susceptible Betta wheat cultivar, displayed a defence response similar to the HR although it was unable to up-regulate specific defensive proteins against RWA infestation but proteins for broad resistance. Although the changes in the proteins in infested Tugela Dn under elevated CO2 concentration were not accurately identified, the defense mechanism is similar to that portrayed by the susceptible Betta wheat cultivar which shows that the resistance mechanism had been overcome. Because this was a pilot study and preliminary results were obtained due to limited funding and time constraints, suggestions were made on how to further develop the method to obtain statistically significant results.
- Full Text:
- Date Issued: 2015
A sociological analysis of the production, marketing and distribution of contemporary popular music by Zambian musicians
- Authors: Kazadi, Kanyabu Solomon
- Date: 2015
- Subjects: Popular music -- Zambia , Musicians -- Zambia , Sound recording industry -- Zambia , Popular music -- Production and direction -- Zambia , Popular music -- Marketing , Intellectual property -- Zambia , Copyright -- Royalties -- Zambia
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3404 , http://hdl.handle.net/10962/d1018933
- Description: The purpose of this research was to gather information about the production, marketing and distribution of Zambian contemporary music by Zambian musicians. Very little information has been documented about the development of the Zambian music industry, particularly from the perspective of those within the industry. As a result this study attempted to add to this knowledge. To achieve this Pierre Bourdieu’s theoretical concepts of ‘fields’ and ‘habitus’ were used to gain an understanding of what affects the creation of art forms such as music as well as the structures and underlying processes within the music industry. The concept of ‘fields’ usefully framed an explanation of the struggles and connections within the various fields in the industry and a view of the Zambian music industry in relation to the international industry. To gather the data necessary for this research a qualitative approach was utilised involving semistructured in-depth questionnaires from twenty-three interviewees. These interviewees were selected from various sectors of the music industry in an attempt to gain a holistic perspective of the industry in the 21st century. There were four subgroups: the artists (singers, rappers and instrumentalists), managers, radio DJs, and a miscellaneous group made up of the remaining participants, a Sounds Arcade manager, a music journalist, the National Arts Council Chairperson, a Zambia Music Copyright Protection Society (ZAMCOPS) administrator, and the then President of the Zambia Association of Musicians (ZAM). With the limited exposure to formal musical, instrumental and production training, musicians, instrumentalists, managers and studio production personnel interviewed had had to learn their craft on-the-job. This limited knowledge appears to add to the hindrance of the development of careers and the industry, particularly in terms of how to register and distribute music correctly to earn royalties and protect their intellectual property against piracy. From an institutional level piracy is being addressed more forcefully with the introduction of holograms and the tightening of policies and structures to do with the music industry.
- Full Text:
- Date Issued: 2015
- Authors: Kazadi, Kanyabu Solomon
- Date: 2015
- Subjects: Popular music -- Zambia , Musicians -- Zambia , Sound recording industry -- Zambia , Popular music -- Production and direction -- Zambia , Popular music -- Marketing , Intellectual property -- Zambia , Copyright -- Royalties -- Zambia
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3404 , http://hdl.handle.net/10962/d1018933
- Description: The purpose of this research was to gather information about the production, marketing and distribution of Zambian contemporary music by Zambian musicians. Very little information has been documented about the development of the Zambian music industry, particularly from the perspective of those within the industry. As a result this study attempted to add to this knowledge. To achieve this Pierre Bourdieu’s theoretical concepts of ‘fields’ and ‘habitus’ were used to gain an understanding of what affects the creation of art forms such as music as well as the structures and underlying processes within the music industry. The concept of ‘fields’ usefully framed an explanation of the struggles and connections within the various fields in the industry and a view of the Zambian music industry in relation to the international industry. To gather the data necessary for this research a qualitative approach was utilised involving semistructured in-depth questionnaires from twenty-three interviewees. These interviewees were selected from various sectors of the music industry in an attempt to gain a holistic perspective of the industry in the 21st century. There were four subgroups: the artists (singers, rappers and instrumentalists), managers, radio DJs, and a miscellaneous group made up of the remaining participants, a Sounds Arcade manager, a music journalist, the National Arts Council Chairperson, a Zambia Music Copyright Protection Society (ZAMCOPS) administrator, and the then President of the Zambia Association of Musicians (ZAM). With the limited exposure to formal musical, instrumental and production training, musicians, instrumentalists, managers and studio production personnel interviewed had had to learn their craft on-the-job. This limited knowledge appears to add to the hindrance of the development of careers and the industry, particularly in terms of how to register and distribute music correctly to earn royalties and protect their intellectual property against piracy. From an institutional level piracy is being addressed more forcefully with the introduction of holograms and the tightening of policies and structures to do with the music industry.
- Full Text:
- Date Issued: 2015
Experiences of incarcerated women who have committed intimate partner homicide
- Authors: Coombs-Brown, Chanelle
- Date: 2015
- Subjects: Incarcerated women Female offenders Women--Violence against
- Language: English
- Type: Thesis , Masters , Psychology
- Identifier: http://hdl.handle.net/10353/17406 , vital:40965
- Description: This qualitative study explores the experiences of incarcerated women who have perpetrated intimate partner homicide (IPH) and had been exposed to intimate partner violence (IPV) in their relationships. The study further explores women’s experiences of IPV, in particular those which motivated them to perpetrate IPH. The study examines how factors associated with IPV affect women to the point of responding with such lethal IPH. Additionally, it explores whether or not women feel remorse for their actions of IPH. The current study falls within an interpretive research paradigm and employs interpretative phenomenological analysis (IPA) as its theoretical framework. The researcher selected IPA as it works well in understanding and describing participants’ experiences. Semi-structured face to face interviews were conducted with nine women incarcerated for IPH. The findings of the study were analysed using the IPA approach. Three main themes emerged from the analysis: mainly all women reported to have experienced IPV in their respective relationships with the deceased, all, except one woman, reported that their partners had committed infidelity, the women also reported to have experienced much disappointment in gaining assistance from the judicial system. Therefore, on-going IPV including death threats resulted in fear; infidelity resulted in tremendous emotional and psychological strain, as well as feelings of betrayal; and perceived lack of support from the judicial system all appeared to have motivated women to perpetrate IPH with the majority indicating remorse.
- Full Text:
- Date Issued: 2015
- Authors: Coombs-Brown, Chanelle
- Date: 2015
- Subjects: Incarcerated women Female offenders Women--Violence against
- Language: English
- Type: Thesis , Masters , Psychology
- Identifier: http://hdl.handle.net/10353/17406 , vital:40965
- Description: This qualitative study explores the experiences of incarcerated women who have perpetrated intimate partner homicide (IPH) and had been exposed to intimate partner violence (IPV) in their relationships. The study further explores women’s experiences of IPV, in particular those which motivated them to perpetrate IPH. The study examines how factors associated with IPV affect women to the point of responding with such lethal IPH. Additionally, it explores whether or not women feel remorse for their actions of IPH. The current study falls within an interpretive research paradigm and employs interpretative phenomenological analysis (IPA) as its theoretical framework. The researcher selected IPA as it works well in understanding and describing participants’ experiences. Semi-structured face to face interviews were conducted with nine women incarcerated for IPH. The findings of the study were analysed using the IPA approach. Three main themes emerged from the analysis: mainly all women reported to have experienced IPV in their respective relationships with the deceased, all, except one woman, reported that their partners had committed infidelity, the women also reported to have experienced much disappointment in gaining assistance from the judicial system. Therefore, on-going IPV including death threats resulted in fear; infidelity resulted in tremendous emotional and psychological strain, as well as feelings of betrayal; and perceived lack of support from the judicial system all appeared to have motivated women to perpetrate IPH with the majority indicating remorse.
- Full Text:
- Date Issued: 2015
Montane Wetlands of the South African Great Escarpment : plant communities and environmental drivers
- Authors: Janks, Matthew Richard
- Date: 2015
- Subjects: Mountain plants -- South Africa -- Eastern Cape , Wetland plants -- South Africa -- Eastern Cape , Wetland plants -- Effect of altitude on -- South Africa -- Eastern Cape , Wetland ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4274 , http://hdl.handle.net/10962/d1018917
- Description: Wetlands provide a number of valuable functions to both the surrounding environment and society. The anaerobic conditions created by flooding in wetlands provide a habitat that supports unique assemblages of plant life. High altitude wetlands are amongst the most species-rich in South Africa. They house a number of rare species and play a vital role in the supply of water to lower lying areas. These are some of the reasons that mountain wetlands are of high conservation value. A phytosociological study was undertaken on the high altitude wetlands of the Great Escarpment with the aim of classifying the plant communities and identifying the environmental drivers of plant community patterns within these ecosystems. Data collection was focused in the Eastern Cape and was supplemented with data from existing studies to gain a more complete understanding of the wetlands of the Great Escarpment of South Africa. Using the Braun-Blanquet approach, Hierarchical Cluster Analysis and Indicator Species Analysis; five broad wetland groups were identified, comprised of 33 individual plant communities and 81 indicator species. Multivariate analysis, including Canonical Correspondence Analysis revealed that the effects of altitude, such as temperature and rainfall, are the most significant large-scale drivers of vegetation patterns. Smaller scale drivers include wetness and soil nutrients including nitrogen, phosphorus, electrical conductivity, sodium, and organic content. The identification of indicator species served to reveal potentially important wetland species across different areas of the Great Escarpment. The effects of altitude on plant community patterns highlights the susceptibility of the high altitude specific communities to upward temperature zone shifts resulting from global warming. Other threats include livestock trampling, water extraction, and land use change for agricultural purposes. The relative absence of alien species in these wetlands gives an indication of their pristine condition and therefore their importance as a reference from which they may be monitored. A large proportion of the wetlands studied here occur outside protected areas, and given the rate of wetland loss in South Africa, it is important that continued effective land management is practiced to ensure that these ecosystems are conserved in the future .
- Full Text:
- Date Issued: 2015
Montane Wetlands of the South African Great Escarpment : plant communities and environmental drivers
- Authors: Janks, Matthew Richard
- Date: 2015
- Subjects: Mountain plants -- South Africa -- Eastern Cape , Wetland plants -- South Africa -- Eastern Cape , Wetland plants -- Effect of altitude on -- South Africa -- Eastern Cape , Wetland ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4274 , http://hdl.handle.net/10962/d1018917
- Description: Wetlands provide a number of valuable functions to both the surrounding environment and society. The anaerobic conditions created by flooding in wetlands provide a habitat that supports unique assemblages of plant life. High altitude wetlands are amongst the most species-rich in South Africa. They house a number of rare species and play a vital role in the supply of water to lower lying areas. These are some of the reasons that mountain wetlands are of high conservation value. A phytosociological study was undertaken on the high altitude wetlands of the Great Escarpment with the aim of classifying the plant communities and identifying the environmental drivers of plant community patterns within these ecosystems. Data collection was focused in the Eastern Cape and was supplemented with data from existing studies to gain a more complete understanding of the wetlands of the Great Escarpment of South Africa. Using the Braun-Blanquet approach, Hierarchical Cluster Analysis and Indicator Species Analysis; five broad wetland groups were identified, comprised of 33 individual plant communities and 81 indicator species. Multivariate analysis, including Canonical Correspondence Analysis revealed that the effects of altitude, such as temperature and rainfall, are the most significant large-scale drivers of vegetation patterns. Smaller scale drivers include wetness and soil nutrients including nitrogen, phosphorus, electrical conductivity, sodium, and organic content. The identification of indicator species served to reveal potentially important wetland species across different areas of the Great Escarpment. The effects of altitude on plant community patterns highlights the susceptibility of the high altitude specific communities to upward temperature zone shifts resulting from global warming. Other threats include livestock trampling, water extraction, and land use change for agricultural purposes. The relative absence of alien species in these wetlands gives an indication of their pristine condition and therefore their importance as a reference from which they may be monitored. A large proportion of the wetlands studied here occur outside protected areas, and given the rate of wetland loss in South Africa, it is important that continued effective land management is practiced to ensure that these ecosystems are conserved in the future .
- Full Text:
- Date Issued: 2015
On active layer processes and landforms in western Dronning Maud Land, Antarctica
- Authors: Scott, David Alan
- Date: 2015
- Subjects: Landforms -- Antarctica -- Queen Maud Land , Permafrost -- Antarctica -- Queen Maud Land , Permafrost -- Thermal properties -- Antarctica -- Queen Maud Land , Climatic changes -- Antarctica -- Queen Maud Land , Cryosphere , Drone aircraft -- Antarctica -- Queen Maud Land , 3-D modeling
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4893 , http://hdl.handle.net/10962/d1019757
- Description: Permafrost is a variable in Antarctic terrestrial ecosystems, and the role it plays in the cryosphere is not well understood. There is much still to be learnt about the thermal state, physical properties, thickness and age of permafrost in Western Dronning Maud Land (WDML). Active layer dynamics and observed change over time have the potential to improve our knowledge of climate change. Understanding the effects of a warming climate on permafrost can also be of benefit to infrastructure, especially in areas with a large amount of frozen ground such as Scandinavia, Canada and Russia. Active layer and permafrost dynamics of WDML, Antarctica, are presented and discussed using data from six study sites, namely the Robertskollen, Vesleskarvet, Flarjuven, Grunehogna, Slettjfell nunataks and the Troll research station in the Jutulsessen area. Ground and ambient air temperature, as well as ground moisture data were collected for each site. An inventory of active layer and permafrost landforms was compiled, as were the frequency of cycles over the zero-degree isotherm, and the depth of the active layer. Furthermore, 3D models, geo-referenced maps and Digital Elevation Models were created of study areas with the use of an Unmanned Aerial Vehicle (UAV). Polygonal features are the most common landscape feature and are common to most of the study sites. Robertskollen has the deepest active layer at over 66cm and Slettfjell the shallowest at 9cm. A maximum recorded air temperature of 8.76°C (10/11/2014) occurred at Troll with the second highest maximum of 6.77°C (22/12/2010) recorded at Vesleskarvet. Robertskollen has the highest observable biological growth and a maximum recorded ground temperature of 22.84°C (10/01/2014). Troll and Valterkulten, registered the second and third highest ground temperatures respectively. The high ground Temperature observed for Robertskollen may be ascribed to it being the lowest altitude site. The highest number of cycles over the zero-degree isotherm was observed at Troll (11.01%), followed by Robertskollen (10.99%). For relatively warm areas, such as Robertskollen it is recommended that two metre borehole loggers are installed in order to capture a detailed understanding of the active layer. The UAV proved to be a beneficial tool for capturing aerial photographs for post fieldwork analysis and 3D modelling.
- Full Text:
- Date Issued: 2015
- Authors: Scott, David Alan
- Date: 2015
- Subjects: Landforms -- Antarctica -- Queen Maud Land , Permafrost -- Antarctica -- Queen Maud Land , Permafrost -- Thermal properties -- Antarctica -- Queen Maud Land , Climatic changes -- Antarctica -- Queen Maud Land , Cryosphere , Drone aircraft -- Antarctica -- Queen Maud Land , 3-D modeling
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4893 , http://hdl.handle.net/10962/d1019757
- Description: Permafrost is a variable in Antarctic terrestrial ecosystems, and the role it plays in the cryosphere is not well understood. There is much still to be learnt about the thermal state, physical properties, thickness and age of permafrost in Western Dronning Maud Land (WDML). Active layer dynamics and observed change over time have the potential to improve our knowledge of climate change. Understanding the effects of a warming climate on permafrost can also be of benefit to infrastructure, especially in areas with a large amount of frozen ground such as Scandinavia, Canada and Russia. Active layer and permafrost dynamics of WDML, Antarctica, are presented and discussed using data from six study sites, namely the Robertskollen, Vesleskarvet, Flarjuven, Grunehogna, Slettjfell nunataks and the Troll research station in the Jutulsessen area. Ground and ambient air temperature, as well as ground moisture data were collected for each site. An inventory of active layer and permafrost landforms was compiled, as were the frequency of cycles over the zero-degree isotherm, and the depth of the active layer. Furthermore, 3D models, geo-referenced maps and Digital Elevation Models were created of study areas with the use of an Unmanned Aerial Vehicle (UAV). Polygonal features are the most common landscape feature and are common to most of the study sites. Robertskollen has the deepest active layer at over 66cm and Slettfjell the shallowest at 9cm. A maximum recorded air temperature of 8.76°C (10/11/2014) occurred at Troll with the second highest maximum of 6.77°C (22/12/2010) recorded at Vesleskarvet. Robertskollen has the highest observable biological growth and a maximum recorded ground temperature of 22.84°C (10/01/2014). Troll and Valterkulten, registered the second and third highest ground temperatures respectively. The high ground Temperature observed for Robertskollen may be ascribed to it being the lowest altitude site. The highest number of cycles over the zero-degree isotherm was observed at Troll (11.01%), followed by Robertskollen (10.99%). For relatively warm areas, such as Robertskollen it is recommended that two metre borehole loggers are installed in order to capture a detailed understanding of the active layer. The UAV proved to be a beneficial tool for capturing aerial photographs for post fieldwork analysis and 3D modelling.
- Full Text:
- Date Issued: 2015
Effects of oats and vetch cover crops on light organic matter fractions and activities of selected enzymes in an irrigated maize based conservation agriculture system on Alice Jozini Ecotope in the Eastern Cape, South Africa
- Authors: Mukumbareza, Caroline
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc Agric (Crop Science)
- Identifier: vital:11872 , http://hdl.handle.net/10353/d1019815
- Description: Low soil fertility in the Eastern Cape Province (EC) is attributed to poor agricultural management, which reduces organic matter, among other factors. Conservation agriculture (CA), consisting of no-till, soil cover and rotations, is being promoted to improve soil quality and productivity. Soil biological parameters respond to the overall effects of management on the physical and chemical components of soil. This study was conducted to evaluate the effects of oat (Avena sativa) and grazing vetch (Vicia dasycarpa) cover crops on soil biological activity after five years under CA and evaluate light organic matter fractions, MBC and activities of selected enzymes as early indicators of organic matter build up under in no-till maize based CA system. The study was based on soil samples collected from a five year trial with rotations of maize and sole covercrops and two younger trials (4 and 28 months) with oat and grazing vetch bicultures. In the five year old trial, oat and grazing vetch were planted at four fertiliser regimes (i) Fertilizer applied to cover crops and maize (F1), (ii) fertilizer applied to cover crops only (F2), (iii) fertilizer applied to maize only (F3) and (iv) no fertilizer applied (F4)) to give a 2 × 4 factorial plus control laid out in a randomized complete block design (RCBD) with three replications. Fertilizer was applied at 10 kg P ha-1, as a compound (6.7% N; 10% P; 13.3% K) at planting and grazing vetch was inoculated with Rhizobium legunominosarium biovar viciae. Oat was top dressed using limestone ammonium nitrate (LAN – 28% N) at 7 weeks after planting (WAP) to make a total of 45 kg N ha-1. Three weeks after termination of the cover crops, all plots were split in half and maize was planted and fertilizer applied at 0 and 60 N kg ha-1. A third of the N was applied at planting (6.7% N; 10% P; 13.3% K). In the biculture trials, the treatments were 90% oat + 10% vetch, 70% oat + 30% vetch, 50% oat+ 50% vetch, 100% vetch and 100% oat and laid out in a RCBD with three replicates. Only basal fertilizer was applied to the cover crop at planting at 13.34 kg N ha-1, 20 kg P ha-1 and 26.66 kg K ha-1 using 2:3:4 (30 + 0.5% Zn) compound fertiliser. After cover crop termination, SC701 maize variety was planted, and fertilised at 60 kg N ha-1 with a third of the N applied as a basal. In the five year old trial, oat and vetch gave significantly (P < 0.05) higher MBC and activities of all soil enzymes measured than the weedy fallow at 0-5 and 5-20 cm depths. Fertilization of cover crop (F2) and maize (F3) gave similar MBC. The F4 in cover crops gave similar dehydrogenase activity with F3 under weedy fallow and that for vetch rotation was the same for F3 in oat. The F4 for grazing vetch had similar β-glucosidase activity as F1 and similar urease activity as F1, F2 and F3 of oat rotations. Acid and alkaline activity in F1 had similar results to F2. In the younger trials, biculture treatments did not improve total C, and N when compared with the weedy fallow. Dehydrogenase, β-glucosidase, arylsulphatase and alkaline phosphatase activities were higher in the 28 month trial compared to the 4 month one while urease was higher in the 4-month old trial. Treatments with more than 50% oat content had higher acid phosphatase activity in the 4- than 28 month old trial. Effects of cover crop, as the main factor, was significant in all enzymes (P < 0.05), with 70% oat + 30% vetch treatment having the highest dehydrogenase and arylsulphatase while for alkaline phosphatase it had similar results to 90% oat + 10% vetch. For β-glucosidase and urease, effects of cover crop as the main factor were also significant with sole vetch giving the highest activity for both enzymes. Acid phosphatase activity was highest in sole oat. Particulate OM was highest in the 100% oat treatment and declined with decrease in the proportion of oat in the biculture. The 50% oat + 50% vetch treatment had similar POM to the 70% oat +30% vetch in the 4 month old trial and to the 90% oat + 10% vetch in the 28 months old trial in the 0-5 cm depth (P < 0.05). In the 5-20 cm depth, the 70% oat +30% vetch treatment had similar POM to the 90% oat + 10% vetch in the 28 month old trial. The 70% oat+30% vetch had greatest WSC and MBC followed by the 90% oat +10% vetch, with the 50% oat + 50% vetch being similar to 100% vetch and 100% oat (MBC only). The 28 months old trial had greater POM and WSC than the 4 months trial. The findings of this study imply that the use of grazing vetch and fertilization of cover crops only improves soil biological activity, represented by MBC and enzyme activities, after 5 years of maize-cover crop rotations in low input conservation agriculture system. Bicultures, particularly the 70% oat + 30% vetch, work better than their sole crops in improving organic matter fractions, MBC and enzyme activities and that POM, WSC, MBC, enzyme activities are useful early indicators of soil organic matter build-up of CA systems.
- Full Text:
- Date Issued: 2014
- Authors: Mukumbareza, Caroline
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc Agric (Crop Science)
- Identifier: vital:11872 , http://hdl.handle.net/10353/d1019815
- Description: Low soil fertility in the Eastern Cape Province (EC) is attributed to poor agricultural management, which reduces organic matter, among other factors. Conservation agriculture (CA), consisting of no-till, soil cover and rotations, is being promoted to improve soil quality and productivity. Soil biological parameters respond to the overall effects of management on the physical and chemical components of soil. This study was conducted to evaluate the effects of oat (Avena sativa) and grazing vetch (Vicia dasycarpa) cover crops on soil biological activity after five years under CA and evaluate light organic matter fractions, MBC and activities of selected enzymes as early indicators of organic matter build up under in no-till maize based CA system. The study was based on soil samples collected from a five year trial with rotations of maize and sole covercrops and two younger trials (4 and 28 months) with oat and grazing vetch bicultures. In the five year old trial, oat and grazing vetch were planted at four fertiliser regimes (i) Fertilizer applied to cover crops and maize (F1), (ii) fertilizer applied to cover crops only (F2), (iii) fertilizer applied to maize only (F3) and (iv) no fertilizer applied (F4)) to give a 2 × 4 factorial plus control laid out in a randomized complete block design (RCBD) with three replications. Fertilizer was applied at 10 kg P ha-1, as a compound (6.7% N; 10% P; 13.3% K) at planting and grazing vetch was inoculated with Rhizobium legunominosarium biovar viciae. Oat was top dressed using limestone ammonium nitrate (LAN – 28% N) at 7 weeks after planting (WAP) to make a total of 45 kg N ha-1. Three weeks after termination of the cover crops, all plots were split in half and maize was planted and fertilizer applied at 0 and 60 N kg ha-1. A third of the N was applied at planting (6.7% N; 10% P; 13.3% K). In the biculture trials, the treatments were 90% oat + 10% vetch, 70% oat + 30% vetch, 50% oat+ 50% vetch, 100% vetch and 100% oat and laid out in a RCBD with three replicates. Only basal fertilizer was applied to the cover crop at planting at 13.34 kg N ha-1, 20 kg P ha-1 and 26.66 kg K ha-1 using 2:3:4 (30 + 0.5% Zn) compound fertiliser. After cover crop termination, SC701 maize variety was planted, and fertilised at 60 kg N ha-1 with a third of the N applied as a basal. In the five year old trial, oat and vetch gave significantly (P < 0.05) higher MBC and activities of all soil enzymes measured than the weedy fallow at 0-5 and 5-20 cm depths. Fertilization of cover crop (F2) and maize (F3) gave similar MBC. The F4 in cover crops gave similar dehydrogenase activity with F3 under weedy fallow and that for vetch rotation was the same for F3 in oat. The F4 for grazing vetch had similar β-glucosidase activity as F1 and similar urease activity as F1, F2 and F3 of oat rotations. Acid and alkaline activity in F1 had similar results to F2. In the younger trials, biculture treatments did not improve total C, and N when compared with the weedy fallow. Dehydrogenase, β-glucosidase, arylsulphatase and alkaline phosphatase activities were higher in the 28 month trial compared to the 4 month one while urease was higher in the 4-month old trial. Treatments with more than 50% oat content had higher acid phosphatase activity in the 4- than 28 month old trial. Effects of cover crop, as the main factor, was significant in all enzymes (P < 0.05), with 70% oat + 30% vetch treatment having the highest dehydrogenase and arylsulphatase while for alkaline phosphatase it had similar results to 90% oat + 10% vetch. For β-glucosidase and urease, effects of cover crop as the main factor were also significant with sole vetch giving the highest activity for both enzymes. Acid phosphatase activity was highest in sole oat. Particulate OM was highest in the 100% oat treatment and declined with decrease in the proportion of oat in the biculture. The 50% oat + 50% vetch treatment had similar POM to the 70% oat +30% vetch in the 4 month old trial and to the 90% oat + 10% vetch in the 28 months old trial in the 0-5 cm depth (P < 0.05). In the 5-20 cm depth, the 70% oat +30% vetch treatment had similar POM to the 90% oat + 10% vetch in the 28 month old trial. The 70% oat+30% vetch had greatest WSC and MBC followed by the 90% oat +10% vetch, with the 50% oat + 50% vetch being similar to 100% vetch and 100% oat (MBC only). The 28 months old trial had greater POM and WSC than the 4 months trial. The findings of this study imply that the use of grazing vetch and fertilization of cover crops only improves soil biological activity, represented by MBC and enzyme activities, after 5 years of maize-cover crop rotations in low input conservation agriculture system. Bicultures, particularly the 70% oat + 30% vetch, work better than their sole crops in improving organic matter fractions, MBC and enzyme activities and that POM, WSC, MBC, enzyme activities are useful early indicators of soil organic matter build-up of CA systems.
- Full Text:
- Date Issued: 2014
Rev James Warren "Jim" Jones: a psychobiographical study
- Authors: Baldwin, Garth Adrian
- Date: 2013
- Subjects: Jones, James Warren -- 1931-1978 , Religious leaders -- United States -- Biography , African American religious leaders -- Biography
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9948 , http://hdl.handle.net/10948/d1015635
- Description: The purpose of a psychobiography is to describe an individual‟s life while using a psychological theory. James Warren “Jim” Jones was selected through purposive sampling because of his instrumental role in organising the largest mass suicide in recorded USA history. Kernberg‟s (1979; 1985; 2004) object relations theory was used to illuminate his life and personality dynamics, a theory focused on describing the borderline personality organisation. The study employed a qualitative single case study design, and data was analysed according to the principals set out by Yin (1994) as well as Miles and Huberman (1994). Results indicated that Kernberg‟s (1979; 1985; 2004) theory was suitable in shedding light on the life of this infamous historical figure, which resulted in an increased understanding of the application of this psychological theory. Lastly, it contributed towards increasing the limited number of psychobiographical studies conducted in South Africa.
- Full Text:
- Date Issued: 2013
- Authors: Baldwin, Garth Adrian
- Date: 2013
- Subjects: Jones, James Warren -- 1931-1978 , Religious leaders -- United States -- Biography , African American religious leaders -- Biography
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9948 , http://hdl.handle.net/10948/d1015635
- Description: The purpose of a psychobiography is to describe an individual‟s life while using a psychological theory. James Warren “Jim” Jones was selected through purposive sampling because of his instrumental role in organising the largest mass suicide in recorded USA history. Kernberg‟s (1979; 1985; 2004) object relations theory was used to illuminate his life and personality dynamics, a theory focused on describing the borderline personality organisation. The study employed a qualitative single case study design, and data was analysed according to the principals set out by Yin (1994) as well as Miles and Huberman (1994). Results indicated that Kernberg‟s (1979; 1985; 2004) theory was suitable in shedding light on the life of this infamous historical figure, which resulted in an increased understanding of the application of this psychological theory. Lastly, it contributed towards increasing the limited number of psychobiographical studies conducted in South Africa.
- Full Text:
- Date Issued: 2013
An investigation of Grade 11 learners' mathematical preparedness in a selected Namibian school: a case study
- Mwandingi, Albertina Ndahambelela
- Authors: Mwandingi, Albertina Ndahambelela
- Date: 2011
- Subjects: Mathematics -- Study and teaching (Secondary) -- Namibia Education, Secondary -- Namibia Mathematical readiness
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1627 , http://hdl.handle.net/10962/d1003509
- Description: The proliferation in the number of schools offering junior secondary education in Namibia since independence in 1990 has led to an increase in the number of learners in the classroom and has created a wide range of mathematical proficiency among learners entering senior secondary education in grade 11. This broad range of basic mathematical ability among these learners, together with increasing classroom numbers has caused problems for the senior secondary mathematics teachers (Batchelor, 2004). The study shows that diagnostic testing can prove to be useful in assessing learners’ mathematical preparedness by identifying learners’ areas of weakness, which have hindered their mathematics learning and performance. Taking the results of a diagnostic test into consideration could help teachers cater for their learners who need remediation classes as early as possible before extending the mathematics curriculum. Setting and using diagnostic testing requires careful consideration; there are many pitfalls that are highlighted in this research. These include question coverage and general analysis of category totals.
- Full Text:
- Date Issued: 2011
- Authors: Mwandingi, Albertina Ndahambelela
- Date: 2011
- Subjects: Mathematics -- Study and teaching (Secondary) -- Namibia Education, Secondary -- Namibia Mathematical readiness
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1627 , http://hdl.handle.net/10962/d1003509
- Description: The proliferation in the number of schools offering junior secondary education in Namibia since independence in 1990 has led to an increase in the number of learners in the classroom and has created a wide range of mathematical proficiency among learners entering senior secondary education in grade 11. This broad range of basic mathematical ability among these learners, together with increasing classroom numbers has caused problems for the senior secondary mathematics teachers (Batchelor, 2004). The study shows that diagnostic testing can prove to be useful in assessing learners’ mathematical preparedness by identifying learners’ areas of weakness, which have hindered their mathematics learning and performance. Taking the results of a diagnostic test into consideration could help teachers cater for their learners who need remediation classes as early as possible before extending the mathematics curriculum. Setting and using diagnostic testing requires careful consideration; there are many pitfalls that are highlighted in this research. These include question coverage and general analysis of category totals.
- Full Text:
- Date Issued: 2011
Economic impact studies and methodological bias : the case of the National Arts Festival in South Africa
- Authors: Bragge, Brent Reuben
- Date: 2011
- Subjects: Standard Bank National Arts Festival Standard Bank National Arts Festival -- Economic aspects Performing arts festivals- Economic aspects -- South Africa Arts -- Economic aspects -- South Africa Economic impact analysis Edinburgh International Festival -- Economic aspects Klein Karoo Nasionale Kunstefees (Oudtshoorn, South Africa) -- Economic aspects Volksbladfees (Bloemfontein, South Africa) -- Economic aspects
- Language: English
- Type: Thesis , Masters , MEcon
- Identifier: vital:968 , http://hdl.handle.net/10962/d1002702
- Description: Over the course of the last three decades, it has become popular practice to evaluate tourism events like cultural festivals in financial terms, through the use of economic impact studies. This can be attributed at least in part to the notable growth in the number of festivals being held globally and, as such, a higher level of competition between festivals for the limited funding which is available. Economic impact studies, and the resultant findings, have thus become powerful tools for the lobbying of sponsorship, and it has become increasingly important that the impact calculations be as accurate as possible, so as to effectively allocate both government and private resources to projects which will be of the greatest benefit to the host region. The allocation of funding is especially vital in an area like the Eastern Cape Province of South Africa, which is faced with many financial difficulties. The allocation of public funds to an event like the National Arts Festival, which is hosted in a relatively wealthy part of the province, might be weighed against initiatives which directly benefit the poorer parts of the region. Although it is acknowledged that the benefits which are felt by the host community of a cultural event go beyond that of the financial, it is often on this basis that festivals are most easily compared. The primary goal of the thesis was to analyse the various forms of methodological bias which can exist in the economic impact analyses (EIA) associated with cultural events. Theoretical considerations were discussed, specifically regarding economic impact as a method of measuring value. Various forms of bias (including data collection, the calculation of visitor numbers, multipliers, defining the area of interest, inclusion of visitor spending, and accounting for benefits only, not costs) are put into a real-life context, through the investigation of economic impact studies conducted on three selected South African festivals (the Volksblad, the Klein Karoo Nasionale Kunstfees, and the National Arts Festival), and one international festival (the Edinburgh Festival). An in-depth comparison of two separate studies conducted at the National Arts Festival (NAF) in 2004 (by Antrobus and Snowball) and 2005 (by Saayman et al.) was made, focussing on the manner in which the economic impact was calculated. Having considered the common forms of bias, and assessing several possible reasons for the difference of approximately twenty million Rand in the advertised economic impacts, it was concluded that, most likely, the miscalculation of visitor numbers was the cause. This was confirmed when the Antrobus and Saayman methods were applied to the 2006 NAF data, and noting that the economic impact figures arrived at were strikingly similar. As such, it is advisable that extreme caution be taken when calculating visitor numbers, as they can significantly influence the outcome of an economic impact study. It is recommended that each study should also have transparent checks in place, regarding the key calculation figures, to ensure that less scrupulous researchers are not as easily able to succumb to the pressure event sponsors might impose to produce inflated impact values.
- Full Text:
- Date Issued: 2011
- Authors: Bragge, Brent Reuben
- Date: 2011
- Subjects: Standard Bank National Arts Festival Standard Bank National Arts Festival -- Economic aspects Performing arts festivals- Economic aspects -- South Africa Arts -- Economic aspects -- South Africa Economic impact analysis Edinburgh International Festival -- Economic aspects Klein Karoo Nasionale Kunstefees (Oudtshoorn, South Africa) -- Economic aspects Volksbladfees (Bloemfontein, South Africa) -- Economic aspects
- Language: English
- Type: Thesis , Masters , MEcon
- Identifier: vital:968 , http://hdl.handle.net/10962/d1002702
- Description: Over the course of the last three decades, it has become popular practice to evaluate tourism events like cultural festivals in financial terms, through the use of economic impact studies. This can be attributed at least in part to the notable growth in the number of festivals being held globally and, as such, a higher level of competition between festivals for the limited funding which is available. Economic impact studies, and the resultant findings, have thus become powerful tools for the lobbying of sponsorship, and it has become increasingly important that the impact calculations be as accurate as possible, so as to effectively allocate both government and private resources to projects which will be of the greatest benefit to the host region. The allocation of funding is especially vital in an area like the Eastern Cape Province of South Africa, which is faced with many financial difficulties. The allocation of public funds to an event like the National Arts Festival, which is hosted in a relatively wealthy part of the province, might be weighed against initiatives which directly benefit the poorer parts of the region. Although it is acknowledged that the benefits which are felt by the host community of a cultural event go beyond that of the financial, it is often on this basis that festivals are most easily compared. The primary goal of the thesis was to analyse the various forms of methodological bias which can exist in the economic impact analyses (EIA) associated with cultural events. Theoretical considerations were discussed, specifically regarding economic impact as a method of measuring value. Various forms of bias (including data collection, the calculation of visitor numbers, multipliers, defining the area of interest, inclusion of visitor spending, and accounting for benefits only, not costs) are put into a real-life context, through the investigation of economic impact studies conducted on three selected South African festivals (the Volksblad, the Klein Karoo Nasionale Kunstfees, and the National Arts Festival), and one international festival (the Edinburgh Festival). An in-depth comparison of two separate studies conducted at the National Arts Festival (NAF) in 2004 (by Antrobus and Snowball) and 2005 (by Saayman et al.) was made, focussing on the manner in which the economic impact was calculated. Having considered the common forms of bias, and assessing several possible reasons for the difference of approximately twenty million Rand in the advertised economic impacts, it was concluded that, most likely, the miscalculation of visitor numbers was the cause. This was confirmed when the Antrobus and Saayman methods were applied to the 2006 NAF data, and noting that the economic impact figures arrived at were strikingly similar. As such, it is advisable that extreme caution be taken when calculating visitor numbers, as they can significantly influence the outcome of an economic impact study. It is recommended that each study should also have transparent checks in place, regarding the key calculation figures, to ensure that less scrupulous researchers are not as easily able to succumb to the pressure event sponsors might impose to produce inflated impact values.
- Full Text:
- Date Issued: 2011