A critical analysis of ethnic conflict in Kenya : the politicisation of ethnicity in Kenya subsequent to the 2007 elections
- Authors: Daweti, Siyabulela
- Date: 2014
- Subjects: Ethnic conflict -- Kenya , Kenya -- Politics and government
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:8345 , http://hdl.handle.net/10948/d1020780
- Description: This study examines the interface between Kenyan politics and ethnicity. More specifically it examines why ethnicity is at the core of Kenyan politics. Although this study discusses how colonialism influenced the ethnicisation of African politics, it focuses more on the era of post-colonial politics. The objective of the study is to investigate how post-colonial Kenyan leaders have shaped the content of Kenyan politics. This study explores ethnic conflicts in Kenya, more especially the 2008 conflict. In order to provide a clear framework for the analysis of Kenyan society, Zambian politics and its social dynamics were also examined in this study. In terms of political development and other variables, one could describe Zambia as Kenya’s peer. It is, therefore, an ideal country against which to evaluate Kenya. In terms research methodology, this study has taken a descriptive and an explanatory approach. Thematic and content analysis has also been employed as data analysis methods. This study has established that the manner in which Kenyan politics are organised is centred on ethnicity. The study found that Kenya’s unique political and social components have predisposed Kenya to ethnic conflicts. For example, a political future within Kenyan political parties and in public office is heavily influenced by one’s ethnicity. Ethnicity also plays a role in the nature of political coalitions. As a solution to the Kenyan problem, this author has recommended that Kenya’s politics (and political campaigns) be based on issues related to the development of Kenyan society, rather than ethnicity. Those in public office should also elevate national identity above ethnic identity.
- Full Text:
- Date Issued: 2014
- Authors: Daweti, Siyabulela
- Date: 2014
- Subjects: Ethnic conflict -- Kenya , Kenya -- Politics and government
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:8345 , http://hdl.handle.net/10948/d1020780
- Description: This study examines the interface between Kenyan politics and ethnicity. More specifically it examines why ethnicity is at the core of Kenyan politics. Although this study discusses how colonialism influenced the ethnicisation of African politics, it focuses more on the era of post-colonial politics. The objective of the study is to investigate how post-colonial Kenyan leaders have shaped the content of Kenyan politics. This study explores ethnic conflicts in Kenya, more especially the 2008 conflict. In order to provide a clear framework for the analysis of Kenyan society, Zambian politics and its social dynamics were also examined in this study. In terms of political development and other variables, one could describe Zambia as Kenya’s peer. It is, therefore, an ideal country against which to evaluate Kenya. In terms research methodology, this study has taken a descriptive and an explanatory approach. Thematic and content analysis has also been employed as data analysis methods. This study has established that the manner in which Kenyan politics are organised is centred on ethnicity. The study found that Kenya’s unique political and social components have predisposed Kenya to ethnic conflicts. For example, a political future within Kenyan political parties and in public office is heavily influenced by one’s ethnicity. Ethnicity also plays a role in the nature of political coalitions. As a solution to the Kenyan problem, this author has recommended that Kenya’s politics (and political campaigns) be based on issues related to the development of Kenyan society, rather than ethnicity. Those in public office should also elevate national identity above ethnic identity.
- Full Text:
- Date Issued: 2014
The determination of compensation in unfair dismissal cases
- Authors: Dayimani, Vuyisile
- Date: 2014
- Subjects: Unfair labor practices -- South Africa , Employees -- Dismissal of -- Law and legislation -- South Africa , Workers' compensation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10275 , http://hdl.handle.net/10948/d1020775
- Description: The LRA 66 of 1995 was established to give effect to section 23(1) of the Constitution of the Republic of South Africa, which guarantees that everyone has a right to fair labour practices. Amongst others, the purpose of the LRA is to advance economic development, labour peace and the effective resolution of labour disputes. At common law termination of employment was occasioned by the conduct of the employer or employee, in terms of which either party may terminate an employment contract by giving agreed notice or reasonable notice. The LRA broadened the common law concept of “repudiation” of a contract of employment in terms of which section 186 of the LRA now defines the term “dismissal” to mean various possible instances that can be caused by the employer or employee. Furthermore, section 185 of the same Act clearly states that a dismissal can be found to be unfair and makes provision for redress to an employee who would be aggrieved by a dismissal. Compensation is one of the remedies that can be awarded to an employee who is found to have been unfairly dismissed. Unlike the LRA of 1956 which gave the courts an unfettered discretion regarding the compensation that could be awarded, section 194 of the current LRA places a limit on the compensation amount that can be awarded. A decision hereon is determined with reference to whether the dismissal is found to have been procedurally, substantively unfair or both. The Act further requires that the compensation must be just and equitable. A challenge in applying section 194 of the Act in this regard is that there would be vast inconsistencies in terms of the amount of compensation to be awarded and that certain presiding officers could consider different approaches in considering factors to be determined when deciding on compensation. In many other instances compensation for unfair dismissal would be decided around the idea of solely punishing the employer. This research document is mainly concerned with identifying the said challenges through case law by considering the decisions of the commissioners and judges in interpreting the old and current provisions of section 194 of the Act. The old section 194 of the Act created a formula to be followed by presiding officers when making a determination on the compensation awarded. The interpretation of the section and its formula brought with it its own complications. The amended section 194 on the other hand, conferred a discretion on presiding officers to award compensation within the caps of 12 months and 24 months for procedurally and substantively unfair dismissal respectively, for as long as the compensation would be just and equitable in all circumstances. Relevant case law and the opinions of labour law experts have been of great assistance in interpreting the current section 194. The factors do not constitute an exhaustive list. They are a mere guideline to presiding officers so as to eliminate or minimize inconsistencies in awarding compensation.
- Full Text:
- Date Issued: 2014
- Authors: Dayimani, Vuyisile
- Date: 2014
- Subjects: Unfair labor practices -- South Africa , Employees -- Dismissal of -- Law and legislation -- South Africa , Workers' compensation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10275 , http://hdl.handle.net/10948/d1020775
- Description: The LRA 66 of 1995 was established to give effect to section 23(1) of the Constitution of the Republic of South Africa, which guarantees that everyone has a right to fair labour practices. Amongst others, the purpose of the LRA is to advance economic development, labour peace and the effective resolution of labour disputes. At common law termination of employment was occasioned by the conduct of the employer or employee, in terms of which either party may terminate an employment contract by giving agreed notice or reasonable notice. The LRA broadened the common law concept of “repudiation” of a contract of employment in terms of which section 186 of the LRA now defines the term “dismissal” to mean various possible instances that can be caused by the employer or employee. Furthermore, section 185 of the same Act clearly states that a dismissal can be found to be unfair and makes provision for redress to an employee who would be aggrieved by a dismissal. Compensation is one of the remedies that can be awarded to an employee who is found to have been unfairly dismissed. Unlike the LRA of 1956 which gave the courts an unfettered discretion regarding the compensation that could be awarded, section 194 of the current LRA places a limit on the compensation amount that can be awarded. A decision hereon is determined with reference to whether the dismissal is found to have been procedurally, substantively unfair or both. The Act further requires that the compensation must be just and equitable. A challenge in applying section 194 of the Act in this regard is that there would be vast inconsistencies in terms of the amount of compensation to be awarded and that certain presiding officers could consider different approaches in considering factors to be determined when deciding on compensation. In many other instances compensation for unfair dismissal would be decided around the idea of solely punishing the employer. This research document is mainly concerned with identifying the said challenges through case law by considering the decisions of the commissioners and judges in interpreting the old and current provisions of section 194 of the Act. The old section 194 of the Act created a formula to be followed by presiding officers when making a determination on the compensation awarded. The interpretation of the section and its formula brought with it its own complications. The amended section 194 on the other hand, conferred a discretion on presiding officers to award compensation within the caps of 12 months and 24 months for procedurally and substantively unfair dismissal respectively, for as long as the compensation would be just and equitable in all circumstances. Relevant case law and the opinions of labour law experts have been of great assistance in interpreting the current section 194. The factors do not constitute an exhaustive list. They are a mere guideline to presiding officers so as to eliminate or minimize inconsistencies in awarding compensation.
- Full Text:
- Date Issued: 2014
Genetic and morphometric variation of Octopus vulgaris in the Benguela Current region
- Authors: De Beer, Chénelle Lesley
- Date: 2014
- Subjects: Common octopus -- Africa, Southern , Common octopus -- Genetics , Common octopus -- Morphology , Common octopus -- Geographical distribution , Variation (Biology) , Benguela Current
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5362 , http://hdl.handle.net/10962/d1012971
- Description: The Benguela Current is a cold eastern boundary current located on the south-western coast of the African continent. The establishment of its present day features approximately two million years ago has triggered allopatric events which have driven genetic and/or phenotypic differentiation in many of the warm-temperate organisms that previously had continuous distributions along the south and west coast of southern Africa. However, since many of these species have responded differently, despite similar isolation times, research in this region provides a unique opportunity to increase our understanding of evolutionary processes. The common octopus (Octopus vulgaris, Cuvier 1797) is a coastal, sedentary species, inhabiting coral reefs or rocky environments at depths of up to a 100m. It is considered to be one of the most extensively studied cephalopod species due to its worldwide distribution. However, very little research has been conducted on O. vulgaris in southern Africa. In order to gain a holistic understanding of the effects of the Benguela Current on population connectivity, genetic and phenotypic diversity, and evolutionary history of O. vulgaris, a comparative genetic and morphological study was conducted across the Benguela region. A total of 168 specimens of O. vulgaris were collected from four different regions across the Benguela system. A small tissue sample was preserved in ethanol for molecular analysis, and the specimen was frozen whole for morphometric analysis in the laboratory. Octopus vulgaris genetic population structure and evolutionary history was investigated using a 580bp fragment of the mitochondrial cytochrome b (cytb) gene for 76 individuals located within the Benguela region, yielding 10 different haplotypes. AMOVA and pairwise FST analyses revealed significant genetic differentiation suggesting a northern-southern Benguela divergence. Estimates of time since most recent common ancestor, based on biogeographical calibrators and coalescent analyses, indicated that isolation between the Angolan and South African population occurred between ~231 Ka and 1 Ma. Mismatch distribution analyses revealed a past population expansion within the South African O. vulgaris roughly 129.31 Ka, whilst Bayesian skyline plots were indicative of gradual demographic growth within the Angolan population in the last ~100 Ka. Observed O. vulgaris population structure and demographic history was likely the result of historical climate-induced change within the system. Reconstruction of phylogenetic relationships within the Octopus genus, using cytb and COI suggest that O. vulgaris is not a monophyletic group and a major systematic revision is required. Furthermore, unidentified individuals from South Africa were found to group with species from Indo-West Pacific Oceans and were therefore considered to have been translocated through ballast water from Asia. While the molecular analysis indicated a significant northern-southern Benguela structure results from the principle component analysis (PCA) and discriminate function analysis (DFA) were unable to distinguish between O. vulgaris from different sampling localities throughout the Benguela Current region based on soft-parts, hard-parts and meristic characters. The lack of phenotypic variation, despite significant genetic divergence, highlights the importance of multi-method approaches in gaining a holistic understanding of the taxonomy and biogeography of species.
- Full Text:
- Date Issued: 2014
- Authors: De Beer, Chénelle Lesley
- Date: 2014
- Subjects: Common octopus -- Africa, Southern , Common octopus -- Genetics , Common octopus -- Morphology , Common octopus -- Geographical distribution , Variation (Biology) , Benguela Current
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5362 , http://hdl.handle.net/10962/d1012971
- Description: The Benguela Current is a cold eastern boundary current located on the south-western coast of the African continent. The establishment of its present day features approximately two million years ago has triggered allopatric events which have driven genetic and/or phenotypic differentiation in many of the warm-temperate organisms that previously had continuous distributions along the south and west coast of southern Africa. However, since many of these species have responded differently, despite similar isolation times, research in this region provides a unique opportunity to increase our understanding of evolutionary processes. The common octopus (Octopus vulgaris, Cuvier 1797) is a coastal, sedentary species, inhabiting coral reefs or rocky environments at depths of up to a 100m. It is considered to be one of the most extensively studied cephalopod species due to its worldwide distribution. However, very little research has been conducted on O. vulgaris in southern Africa. In order to gain a holistic understanding of the effects of the Benguela Current on population connectivity, genetic and phenotypic diversity, and evolutionary history of O. vulgaris, a comparative genetic and morphological study was conducted across the Benguela region. A total of 168 specimens of O. vulgaris were collected from four different regions across the Benguela system. A small tissue sample was preserved in ethanol for molecular analysis, and the specimen was frozen whole for morphometric analysis in the laboratory. Octopus vulgaris genetic population structure and evolutionary history was investigated using a 580bp fragment of the mitochondrial cytochrome b (cytb) gene for 76 individuals located within the Benguela region, yielding 10 different haplotypes. AMOVA and pairwise FST analyses revealed significant genetic differentiation suggesting a northern-southern Benguela divergence. Estimates of time since most recent common ancestor, based on biogeographical calibrators and coalescent analyses, indicated that isolation between the Angolan and South African population occurred between ~231 Ka and 1 Ma. Mismatch distribution analyses revealed a past population expansion within the South African O. vulgaris roughly 129.31 Ka, whilst Bayesian skyline plots were indicative of gradual demographic growth within the Angolan population in the last ~100 Ka. Observed O. vulgaris population structure and demographic history was likely the result of historical climate-induced change within the system. Reconstruction of phylogenetic relationships within the Octopus genus, using cytb and COI suggest that O. vulgaris is not a monophyletic group and a major systematic revision is required. Furthermore, unidentified individuals from South Africa were found to group with species from Indo-West Pacific Oceans and were therefore considered to have been translocated through ballast water from Asia. While the molecular analysis indicated a significant northern-southern Benguela structure results from the principle component analysis (PCA) and discriminate function analysis (DFA) were unable to distinguish between O. vulgaris from different sampling localities throughout the Benguela Current region based on soft-parts, hard-parts and meristic characters. The lack of phenotypic variation, despite significant genetic divergence, highlights the importance of multi-method approaches in gaining a holistic understanding of the taxonomy and biogeography of species.
- Full Text:
- Date Issued: 2014
Factors contributing to occupational stress in student support staff in a Further Education and Training (FET) College in the Southern Cape
- Authors: De Klerk, Ulricha
- Subjects: Work -- Psychological aspects , Job stress -- South Africa -- Western Cape , College students -- South Africa -- Western Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10085 , http://hdl.handle.net/10948/d1020806
- Description: The main purpose of this study is to explore the factors that contribute to occupational stress as experienced by the Student Support staff in a Further Education and Training (FET) College in the Southern Cape. The Student Support staff has displayed many symptoms of stress over the past few years. This in turn has led to absenteeism, change in staff temperament, their feelings towards the College, motivation levels and a significant change in the staff’s day to day operations. Although the Head of Department for Student Support Services has engaged with the staff on numerous occasions to discuss the reasons for their experience of stress, no substantial reasons could be established in order to make the necessary changes in the department. No interventions that have been implemented to date have relieved the staff’s experience of stress. The researcher chose to use a qualitative, exploratory, descriptive and contextual research design to gain insight into the situation or phenomenon in order to identify the factors contributing to occupational stress and to identify measures that can be implemented to reduce occupational stress in the Student Support staff. The participants in this research included at least 10 Student Support staff within the Student Support Services Department at a Further Education and Training College in the Southern Cape. Purposive sampling was used in this research study. Interviews will continue until data saturation is achieved. The staff members must have been employed for at least one year in the Student Support Services Department. The researcher will make use of semi-structured interviews, observations and field notes. The data will be systematically collected and meanings, themes and general descriptions of the experience analysed within the specific context (de Vos, Strydom, Fouche & Delport, 2005). The researcher will make use of Tesch’s method of analysis, and use Guba’s strategies for ensuring Trustworthiness. The researcher will apply the ethical considerations of confidentiality, informed consent, ethical approval from relevant institutions, avoidance of harm to participants, truthfulness and the debriefing of participants when conducting this study. The findings were reported as three major themes and subthemes. The three major themes were; Student support staff identified several factors that contributed to occupational stress, Student support staff identified the effect that occupational stress has on them, Student support staff offered suggestions that the college could implement to reduce occupational stress. These themes were discussed and analysed in-depth.
- Full Text:
- Authors: De Klerk, Ulricha
- Subjects: Work -- Psychological aspects , Job stress -- South Africa -- Western Cape , College students -- South Africa -- Western Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10085 , http://hdl.handle.net/10948/d1020806
- Description: The main purpose of this study is to explore the factors that contribute to occupational stress as experienced by the Student Support staff in a Further Education and Training (FET) College in the Southern Cape. The Student Support staff has displayed many symptoms of stress over the past few years. This in turn has led to absenteeism, change in staff temperament, their feelings towards the College, motivation levels and a significant change in the staff’s day to day operations. Although the Head of Department for Student Support Services has engaged with the staff on numerous occasions to discuss the reasons for their experience of stress, no substantial reasons could be established in order to make the necessary changes in the department. No interventions that have been implemented to date have relieved the staff’s experience of stress. The researcher chose to use a qualitative, exploratory, descriptive and contextual research design to gain insight into the situation or phenomenon in order to identify the factors contributing to occupational stress and to identify measures that can be implemented to reduce occupational stress in the Student Support staff. The participants in this research included at least 10 Student Support staff within the Student Support Services Department at a Further Education and Training College in the Southern Cape. Purposive sampling was used in this research study. Interviews will continue until data saturation is achieved. The staff members must have been employed for at least one year in the Student Support Services Department. The researcher will make use of semi-structured interviews, observations and field notes. The data will be systematically collected and meanings, themes and general descriptions of the experience analysed within the specific context (de Vos, Strydom, Fouche & Delport, 2005). The researcher will make use of Tesch’s method of analysis, and use Guba’s strategies for ensuring Trustworthiness. The researcher will apply the ethical considerations of confidentiality, informed consent, ethical approval from relevant institutions, avoidance of harm to participants, truthfulness and the debriefing of participants when conducting this study. The findings were reported as three major themes and subthemes. The three major themes were; Student support staff identified several factors that contributed to occupational stress, Student support staff identified the effect that occupational stress has on them, Student support staff offered suggestions that the college could implement to reduce occupational stress. These themes were discussed and analysed in-depth.
- Full Text:
Breast cancer: current developments in molecular approaches to diagnosis and treatment
- de la Mare, Jo-Anne, Contu, Lara, Hunter, Morgan C, Moyo, Buhle, Sterrenberg, Jason N, Dhanani, Karim C H, Mutsvunguma, Lorraine Z, Edkins, Adrienne L
- Authors: de la Mare, Jo-Anne , Contu, Lara , Hunter, Morgan C , Moyo, Buhle , Sterrenberg, Jason N , Dhanani, Karim C H , Mutsvunguma, Lorraine Z , Edkins, Adrienne L
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/164819 , vital:41175 , DOI: 10.2174/15748928113086660046
- Description: Due to the high heterogeneity of breast cancers, numerous recent patents describe improved methods of detection and classification which promise better patient prognosis and treatment. In particular, there has been a shift towards more effective genetic screening to identify specific mutations associated with breast tumours, which may lead to “personalised medicine” with improved outcomes. Two challenging areas of breast cancer research involve the development of treatments for the highly aggressive triple negative breast cancer subtype as well as the chemotherapy-resistant cancer stem cell subpopulation. In addition, despite numerous recent advances in breast cancer treatment in woman, male breast cancer remains poorly understood and there are limited therapies available which are developed specifically for men. This review serves to report on important developments in the treatment of breast malignancies patented in the past two years as well as to highlight the current gaps in the field of breast cancer therapeutics and areas which require further study.
- Full Text:
- Date Issued: 2014
- Authors: de la Mare, Jo-Anne , Contu, Lara , Hunter, Morgan C , Moyo, Buhle , Sterrenberg, Jason N , Dhanani, Karim C H , Mutsvunguma, Lorraine Z , Edkins, Adrienne L
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/164819 , vital:41175 , DOI: 10.2174/15748928113086660046
- Description: Due to the high heterogeneity of breast cancers, numerous recent patents describe improved methods of detection and classification which promise better patient prognosis and treatment. In particular, there has been a shift towards more effective genetic screening to identify specific mutations associated with breast tumours, which may lead to “personalised medicine” with improved outcomes. Two challenging areas of breast cancer research involve the development of treatments for the highly aggressive triple negative breast cancer subtype as well as the chemotherapy-resistant cancer stem cell subpopulation. In addition, despite numerous recent advances in breast cancer treatment in woman, male breast cancer remains poorly understood and there are limited therapies available which are developed specifically for men. This review serves to report on important developments in the treatment of breast malignancies patented in the past two years as well as to highlight the current gaps in the field of breast cancer therapeutics and areas which require further study.
- Full Text:
- Date Issued: 2014
The comparative growth rates of indigenous street and garden trees in Grahamstown, South Africa
- De Lacy, Peter J G, Shackleton, Charlie M
- Authors: De Lacy, Peter J G , Shackleton, Charlie M
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/180943 , vital:43672 , xlink:href="https://doi.org/10.1016/j.sajb.2014.02.007"
- Description: Urban forestry is advocated worldwide as a means of enhancing the liveability of towns and cities, and mitigating some of the anticipated impacts of climate change. Optimisation of the benefits of trees in urban areas is dependent upon knowledge of tree form, growth, and the products and benefits that trees provide. Growth rates are a vital variable for modelling benefits, yet there is a significant gap in knowledge pertaining to growth rates of trees in urban areas, especially indigenous species in developing world countries. Here we report on growth rates of indigenous street and garden trees in Grahamstown, South Africa, using two approaches; tree ring counts on increment cores and mean rates from trees of known planting age. Growth equations for both street and garden trees were derived. There was no significant difference in mean growth rates determined via the two methods. For both methods street trees grew approximately 30% slower than trees in gardens.
- Full Text:
- Date Issued: 2014
- Authors: De Lacy, Peter J G , Shackleton, Charlie M
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/180943 , vital:43672 , xlink:href="https://doi.org/10.1016/j.sajb.2014.02.007"
- Description: Urban forestry is advocated worldwide as a means of enhancing the liveability of towns and cities, and mitigating some of the anticipated impacts of climate change. Optimisation of the benefits of trees in urban areas is dependent upon knowledge of tree form, growth, and the products and benefits that trees provide. Growth rates are a vital variable for modelling benefits, yet there is a significant gap in knowledge pertaining to growth rates of trees in urban areas, especially indigenous species in developing world countries. Here we report on growth rates of indigenous street and garden trees in Grahamstown, South Africa, using two approaches; tree ring counts on increment cores and mean rates from trees of known planting age. Growth equations for both street and garden trees were derived. There was no significant difference in mean growth rates determined via the two methods. For both methods street trees grew approximately 30% slower than trees in gardens.
- Full Text:
- Date Issued: 2014
Turning the lens on the adolescent suicide
- Authors: De Monk, Ingrid Venessia
- Date: 2014
- Subjects: Teenagers -- Suicidal behavior South Africa -- Port Elizabeth , School children -- Mental health services -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:9582 , http://hdl.handle.net/10948/d1020791
- Description: In South Africa, suicidal behaviour in the younger generations has become rapidly part of a major public health problem. It is a well-known fact that adolescence is a critical period of progression in a teenager’s development which makes them more susceptible and vulnerable to suicide. Statistics have shown that there has been an increase in suicide among adolescents within the last decade (Schlebusch, 2005). The main aim of this research study is to explore the perceptions of adolescents regarding the factors that contribute to adolescent suicide. This study reviews literature concerning various risks factors for adolescent suicidality. It also described major social and psychological theories of suicide and the extent to which these studies support the importance to adolescent suicide. In the literature review theories of Bronfenbrenner’s Ecological Systems Theory, Durkheim’s sociological theory of suicide, Freud’s psychological perspective and Baumeister’s Escape Theory were discussed. A qualitative research design will be used by using visual participatory methodology techniques namely photo voice and reflective writing. A sample of 12 grade 11 learners, male and female, was purposely selected to participate in the research study. The focus of the study is to investigate the risk factors underlying adolescent suicidal behaviour in schools in the Northern Areas of Port Elizabeth, as well as to explore the stressors experienced by adolescents that could contribute to them having a higher suicide risk. Another focus point will be to look at prevention strategies as an antipode for suicidal behaviour. The main findings that emerged from the data analysis include contributing factors namely: socio-economic factors, personal factors, psychological factors and educational and school-related factors. The main prevention strategy themes emerged from findings derived from the data and include: parental involvement, religion, professional help and support groups and confiding in someone that you trust.
- Full Text:
- Date Issued: 2014
- Authors: De Monk, Ingrid Venessia
- Date: 2014
- Subjects: Teenagers -- Suicidal behavior South Africa -- Port Elizabeth , School children -- Mental health services -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:9582 , http://hdl.handle.net/10948/d1020791
- Description: In South Africa, suicidal behaviour in the younger generations has become rapidly part of a major public health problem. It is a well-known fact that adolescence is a critical period of progression in a teenager’s development which makes them more susceptible and vulnerable to suicide. Statistics have shown that there has been an increase in suicide among adolescents within the last decade (Schlebusch, 2005). The main aim of this research study is to explore the perceptions of adolescents regarding the factors that contribute to adolescent suicide. This study reviews literature concerning various risks factors for adolescent suicidality. It also described major social and psychological theories of suicide and the extent to which these studies support the importance to adolescent suicide. In the literature review theories of Bronfenbrenner’s Ecological Systems Theory, Durkheim’s sociological theory of suicide, Freud’s psychological perspective and Baumeister’s Escape Theory were discussed. A qualitative research design will be used by using visual participatory methodology techniques namely photo voice and reflective writing. A sample of 12 grade 11 learners, male and female, was purposely selected to participate in the research study. The focus of the study is to investigate the risk factors underlying adolescent suicidal behaviour in schools in the Northern Areas of Port Elizabeth, as well as to explore the stressors experienced by adolescents that could contribute to them having a higher suicide risk. Another focus point will be to look at prevention strategies as an antipode for suicidal behaviour. The main findings that emerged from the data analysis include contributing factors namely: socio-economic factors, personal factors, psychological factors and educational and school-related factors. The main prevention strategy themes emerged from findings derived from the data and include: parental involvement, religion, professional help and support groups and confiding in someone that you trust.
- Full Text:
- Date Issued: 2014
The interaction of silver nanoparticles with triosephosphate isomerase from human and malarial parasite (Plasmodium falciparum) : a comparative study
- De Moor, Warren Ralph Josephus
- Authors: De Moor, Warren Ralph Josephus
- Date: 2014
- Subjects: Silver , Nanoparticles , Triose-phosphate isomerase , Plasmodium falciparum , Nanotechnology , Antimalarials , Povidone
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4169 , http://hdl.handle.net/10962/d1020895
- Description: The advent of advanced modern nanotechnology techniques offers new and exciting opportunities to develop novel nanotech-derived antimalarial nanodrugs with enhanced selective and targeting abilities that allow for lower effective drug dosages, longer drug persistence and reduced drug degradation within the body. Using a nanodrug approach also has the advantage of avoiding drug resistance problems that plague reconfigured versions of already-existing antimalarial drugs. In this study recombinant triosephosphate isomerase enzymes from Plasmodium falciparum (PfTIM) and Humans (hTIM) were recombinantly expressed, purified and characterised. PfTIM was shown to have optimal pH stability at pH 5.0-5.5 and thermal stability at 25°C with Km 4.34 mM and Vmax 0.876 μmol.ml⁻ₑmin⁻ₑ. For hTIM, these parameters were as follows: pH optima of 6.5-7.0; temperature optima of 30°C, with Km 2.27 mM and Vmax 0.714 μmol.ml⁻ₑmin⁻ₑ. Recombinant TIM enzymes were subjected to inhibition studies using polyvinylpyrrolidone (PVP) stabilised silver nanoparticles (AgNPs) of 4-12 nm in diameter. These studies showed that the AgNPs were able to selectively inhibit PfTIM over hTIM with an 8-fold greater decrease in enzymatic efficiency (Kcat/Km) observed for PfTIM, as compared to hTIM, for kinetics tests done using 0.06 μM of AgNPs. Complete inhibition of PfTIM under optimal conditions was achieved using 0.25 μM AgNPs after 45 minutes while hTIM maintained approximately 31% of its activity at this AgNP concentration. The above results indicate that selective enzymatic targeting of the important, key metabolic enzyme TIM, can be achieved using nanotechnology-derived nanodrugs. It was demonstrated that the key structural differences, between the two enzyme variants, were significant enough to create unique characteristics for each TIM variant, thereby allowing for selective enzyme targeting using AgNPs. If these AgNPs could be coupled with a nanotechnology-derived, targeted localization mechanism – possibly using apoferritin to deliver the AgNPs to infected erythrocytes (Burns and Pollock, 2008) – then such an approach could offer new opportunities for the development of viable antimalarial nanodrugs. For this to be achieved further research into several key areas will be required, including nanoparticle toxicity, drug localization and testing the lethality of the system on live parasite cultures.
- Full Text:
- Date Issued: 2014
- Authors: De Moor, Warren Ralph Josephus
- Date: 2014
- Subjects: Silver , Nanoparticles , Triose-phosphate isomerase , Plasmodium falciparum , Nanotechnology , Antimalarials , Povidone
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4169 , http://hdl.handle.net/10962/d1020895
- Description: The advent of advanced modern nanotechnology techniques offers new and exciting opportunities to develop novel nanotech-derived antimalarial nanodrugs with enhanced selective and targeting abilities that allow for lower effective drug dosages, longer drug persistence and reduced drug degradation within the body. Using a nanodrug approach also has the advantage of avoiding drug resistance problems that plague reconfigured versions of already-existing antimalarial drugs. In this study recombinant triosephosphate isomerase enzymes from Plasmodium falciparum (PfTIM) and Humans (hTIM) were recombinantly expressed, purified and characterised. PfTIM was shown to have optimal pH stability at pH 5.0-5.5 and thermal stability at 25°C with Km 4.34 mM and Vmax 0.876 μmol.ml⁻ₑmin⁻ₑ. For hTIM, these parameters were as follows: pH optima of 6.5-7.0; temperature optima of 30°C, with Km 2.27 mM and Vmax 0.714 μmol.ml⁻ₑmin⁻ₑ. Recombinant TIM enzymes were subjected to inhibition studies using polyvinylpyrrolidone (PVP) stabilised silver nanoparticles (AgNPs) of 4-12 nm in diameter. These studies showed that the AgNPs were able to selectively inhibit PfTIM over hTIM with an 8-fold greater decrease in enzymatic efficiency (Kcat/Km) observed for PfTIM, as compared to hTIM, for kinetics tests done using 0.06 μM of AgNPs. Complete inhibition of PfTIM under optimal conditions was achieved using 0.25 μM AgNPs after 45 minutes while hTIM maintained approximately 31% of its activity at this AgNP concentration. The above results indicate that selective enzymatic targeting of the important, key metabolic enzyme TIM, can be achieved using nanotechnology-derived nanodrugs. It was demonstrated that the key structural differences, between the two enzyme variants, were significant enough to create unique characteristics for each TIM variant, thereby allowing for selective enzyme targeting using AgNPs. If these AgNPs could be coupled with a nanotechnology-derived, targeted localization mechanism – possibly using apoferritin to deliver the AgNPs to infected erythrocytes (Burns and Pollock, 2008) – then such an approach could offer new opportunities for the development of viable antimalarial nanodrugs. For this to be achieved further research into several key areas will be required, including nanoparticle toxicity, drug localization and testing the lethality of the system on live parasite cultures.
- Full Text:
- Date Issued: 2014
Contemporary use and seasonal abundance of indigenous edible plants (with an emphasis on geophytes) available to human foragers on the Cape south coast, South Africa
- Authors: De Vynck, Jan Carlo
- Date: 2014
- Subjects: Wild plants, Edible -- Africa, Southern , Coastal plants -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10638 , http://hdl.handle.net/10948/d1020044
- Description: Human subsistence within the Cape Floristic Region (Cape) dates back to our inception as a distinct species. Unique archaeological evidence found here for the defining attribute of cognitive modernity, as well as coinciding paleo-climatic challenges to survival, both highlight the Cape’s potential to support the existence of pre-historic hunter-gatherers. This habitat, with its unprecedented diversity of geophytes and other plant growth forms, has not yet revealed its potential to provide carbohydrate resources for early Homo sapiens sapiens. In order to investigate this potential, an ethnobotanical survey of the south Cape coastal area near Still Bay was conducted. Despite 17th Century colonialism marking the onset of indigenous plant knowledge decline, the 18 people of Khoe-San descent interviewed in this survey still actively used 58 indigenous edible plant species with a variety of 69 uses. Fruit showed the highest popularity of plants used (52 percent) followed by nectar, with plants having underground storage organs (USOs) ranking third (34 percent). Among growth forms, shrubs dominated (34 percent) followed by geophytes and trees (both 21 percent). With the exception of Prionium serratum, which was rare in the research area, this study failed to identify species that could have formed a staple source of carbohydrate for pre-colonial Khoe-San peoples of the Cape south coast. While eight species of USOs were identified (12 percent of total) only Cyphia species emerged as an important carbohydrate source. This study indicated the importance of Thicket Biome species as a source of edible plants. The second component of the study comprised a two year phenological survey of indigenous edible plant species in four primary vegetation types. A total of 32 USO species and 21 species with aboveground edible carbohydrates (fruiting species) were identified across all sites. Limestone Fynbos had the richest flora of edible species (21 USO species and 18 fruiting species), followed by Strandveld (15 USOs and 13 fruiting species), Renosterveld (8 and 8, respectively) and lastly Sand Fynbos (5 and 5, respectively). The season of highest apparency showed slight variation amongst the four sites over the two years, with more variation evident in the period of apparency. The first survey year had below average rainfall, while the second year received an average rainfall amount. The second year saw a dramatic increase in apparency of abundance for all sites (50 to 60 percent increase) except for the Sand Fynbos site, which showed little change. The other sites showed a one month increase in the period of apparency in the second survey year. Overall, late summer to autumn was the period of lowest apparency of USOs. The ripening of certain fruiting species during this time would have provided a source of carbohydrate when USO availability was at its lowest. Strandveld had the highest biomass in the peak of apparency (over 80 kgha-1) in the first year with a nearly 20 percent increase for the second year. The combined biomass for the four study sites in the first survey year was roughly 150 kgha-1 and 185 kgha-1 for the second year. The apparency of abundance (ripe and edible phase) of fruiting species did not increase much for Renosterveld and Strandveld in the second survey year, except for Limestone Fynbos (49 percent increase) and Sand Fynbos (53 percent). A multivariate analysis showed seven phenophases for high apparency of edible USOs and ripe fruit across the four vegetation types. Given the contribution of evergreen USOs and fruiting species, there would always have been carbohydrates available for foragers to collect in the major vegetation types of the south Cape coast. However, harvesting and processing this carbohydrate resource would have posed cognitive challenges for MSA hunter-gatherers, given the interwoven taxonomic complexity of numerous toxic plant species, and the diverse phenology of edible plant species within the varied vegetation types. These challenges were undoubtedly mastered, highlighting the Cape environment as a possible catalyst to improved human cognitive maturity.
- Full Text:
- Date Issued: 2014
- Authors: De Vynck, Jan Carlo
- Date: 2014
- Subjects: Wild plants, Edible -- Africa, Southern , Coastal plants -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10638 , http://hdl.handle.net/10948/d1020044
- Description: Human subsistence within the Cape Floristic Region (Cape) dates back to our inception as a distinct species. Unique archaeological evidence found here for the defining attribute of cognitive modernity, as well as coinciding paleo-climatic challenges to survival, both highlight the Cape’s potential to support the existence of pre-historic hunter-gatherers. This habitat, with its unprecedented diversity of geophytes and other plant growth forms, has not yet revealed its potential to provide carbohydrate resources for early Homo sapiens sapiens. In order to investigate this potential, an ethnobotanical survey of the south Cape coastal area near Still Bay was conducted. Despite 17th Century colonialism marking the onset of indigenous plant knowledge decline, the 18 people of Khoe-San descent interviewed in this survey still actively used 58 indigenous edible plant species with a variety of 69 uses. Fruit showed the highest popularity of plants used (52 percent) followed by nectar, with plants having underground storage organs (USOs) ranking third (34 percent). Among growth forms, shrubs dominated (34 percent) followed by geophytes and trees (both 21 percent). With the exception of Prionium serratum, which was rare in the research area, this study failed to identify species that could have formed a staple source of carbohydrate for pre-colonial Khoe-San peoples of the Cape south coast. While eight species of USOs were identified (12 percent of total) only Cyphia species emerged as an important carbohydrate source. This study indicated the importance of Thicket Biome species as a source of edible plants. The second component of the study comprised a two year phenological survey of indigenous edible plant species in four primary vegetation types. A total of 32 USO species and 21 species with aboveground edible carbohydrates (fruiting species) were identified across all sites. Limestone Fynbos had the richest flora of edible species (21 USO species and 18 fruiting species), followed by Strandveld (15 USOs and 13 fruiting species), Renosterveld (8 and 8, respectively) and lastly Sand Fynbos (5 and 5, respectively). The season of highest apparency showed slight variation amongst the four sites over the two years, with more variation evident in the period of apparency. The first survey year had below average rainfall, while the second year received an average rainfall amount. The second year saw a dramatic increase in apparency of abundance for all sites (50 to 60 percent increase) except for the Sand Fynbos site, which showed little change. The other sites showed a one month increase in the period of apparency in the second survey year. Overall, late summer to autumn was the period of lowest apparency of USOs. The ripening of certain fruiting species during this time would have provided a source of carbohydrate when USO availability was at its lowest. Strandveld had the highest biomass in the peak of apparency (over 80 kgha-1) in the first year with a nearly 20 percent increase for the second year. The combined biomass for the four study sites in the first survey year was roughly 150 kgha-1 and 185 kgha-1 for the second year. The apparency of abundance (ripe and edible phase) of fruiting species did not increase much for Renosterveld and Strandveld in the second survey year, except for Limestone Fynbos (49 percent increase) and Sand Fynbos (53 percent). A multivariate analysis showed seven phenophases for high apparency of edible USOs and ripe fruit across the four vegetation types. Given the contribution of evergreen USOs and fruiting species, there would always have been carbohydrates available for foragers to collect in the major vegetation types of the south Cape coast. However, harvesting and processing this carbohydrate resource would have posed cognitive challenges for MSA hunter-gatherers, given the interwoven taxonomic complexity of numerous toxic plant species, and the diverse phenology of edible plant species within the varied vegetation types. These challenges were undoubtedly mastered, highlighting the Cape environment as a possible catalyst to improved human cognitive maturity.
- Full Text:
- Date Issued: 2014
Die ervaring van die geregistreerde verpleegkundedosent ten opsigte van die kliniese begeleiding van verpleegstudente
- Authors: De Wet, Annemie
- Date: 2014
- Subjects: Nursing students , Mentoring in nursing -- South Africa
- Language: Afrikaans
- Type: Thesis , Masters , MCur
- Identifier: vital:10053 , http://hdl.handle.net/10948/1018275
- Description: Die doel van die studie was om vas te stel hoe die verpleegkundedosent die begeleiding van verpleegstudente in die praktyk ervaar. In die verlede was begeleiding van verpleegstudente met praktika in gesondheidsorginstansies deur ʼn professionele verpleegkundige gedoen wat deel was van die personeel se verantwoordelikhede. Die verpleegstudente doen hul teoretiese kennis op by ʼn tersiêre instansie en verkry hul praktiese kennis by ʼn geakkrediteerde gesondheidsorginstansie soos vereis deur die Suid-Afrikaanse Raad op Verpleging (SARV). Een van die take van ‘n verpleegkundedosent van die privaat opleidingskool is om die kliniese begeleiding van verpleegstudente in geakkrediteerde instellings te doen. Omdat verpleging ʼn beroep is waar vaardighede belangrik is, is praktiese inoefening van prosedures en evaluering van die verpleegstudente se vaardigheid daarin noodsaaklik. Die verpleegstudente is heeltyd besig met die pasiënte in die vorm van prosedures waarby die teorie wat in die opleidingskool verkry was, gekorreleer moet word met die prosedure om die hele prentjie te vorm. Dit is dus nodig dat begeleiding van die verpleegstudente gedoen moet word om vaardigheid en toepassing van kennis te verseker. Die navorser het ʼn kwalitatiewe, ondersoekende, beskrywende en kontekstuele studie gedoen waarvan die populasie die geregistreerde dosente van verskeie provinsiale en privaatverpleegskole in die Klein-Karoo en Suid-kaapdistrikte was. Die navorser het gebruik gemaak van ʼn nie-waarskynlike steekproef. Inligtingryke data was ingesamel deur semi-gestruktureerde onderhoude wat aangevul was met veldnotas soos verkry tydens onderhoude. Data-ontleding was reeds begin met data-insameling en Tesch se inhoudsontleding was gebruik om ʼn mening te vorm. ‘n Literatuurkontrole was gedoen om te bepaal wat vorige navorsing oor begeleiding bevind en aanbeveel het. Lincoln en Guba se model was gebruik vir betroubaarheidsversekering volgens die kriteria wat hulle aanbeveel het, naamlik geloofwaardigheid, oordraagbaarheid, betroubaarheid en bevestigbaarheid. Uit die data-ontleding het vier belangrike temas en subtemas te voorskyn gekom. Die temas was dat die verpleegkundedosente aspekte van die begeleiding van verpleegstudente in die gesondheidsorginstansie as positief en ook as negatief beleef. Die wyse waarop die gesondheidsorginstansies bestuur word, het die begeleiding beïnvloed en daar was riglyne voorgestel wat die kliniese personeel en dosente kan rig wanneer hulle betrokke raak by die begeleiding van verpleegstudente. Die begeleiding van verpleegstudente deur verpleegkundedosente, kliniese dosente en die gesondheidsorginstansie se opgeleide personeel, is ʼn belangrike deel van verpleegopleiding en bepaal uiteindelik die kwaliteit van die pasiëntsorg wat verskaf word deur die verpleegkundiges. Die navorser het riglyne daar gestel om die begeleiding van vepleegstudente te rig. Die riglyne moet nou geïmplementeer en getoets word binne die konteks van die bepaalde verpleegskole en dan weer geëvalueer word. Beperkings wat ondervind was in die studie was dat die steekproef ʼn klein groepie verpleegkundedosente op die platteland was, wat veralgemening bemoeilik, veral in die stedelike konteks. Die begeleiding van die verpleegstudente is gedoen met die ingeskrewe verpleegstudente (Die Suid-Afrikaanse Raad op Verpleging Regulasies, Regulasie 2176 en 2175 van 19 November 1993), naamlik die kategorie met die minste status en verantwoordelikheid onder verpleegstudente. Veralgemening na alle kategorieë, veral verpleegstudente besig met professionele verpleegprogramme, mag dus nie sinvol wees nie.
- Full Text:
- Date Issued: 2014
- Authors: De Wet, Annemie
- Date: 2014
- Subjects: Nursing students , Mentoring in nursing -- South Africa
- Language: Afrikaans
- Type: Thesis , Masters , MCur
- Identifier: vital:10053 , http://hdl.handle.net/10948/1018275
- Description: Die doel van die studie was om vas te stel hoe die verpleegkundedosent die begeleiding van verpleegstudente in die praktyk ervaar. In die verlede was begeleiding van verpleegstudente met praktika in gesondheidsorginstansies deur ʼn professionele verpleegkundige gedoen wat deel was van die personeel se verantwoordelikhede. Die verpleegstudente doen hul teoretiese kennis op by ʼn tersiêre instansie en verkry hul praktiese kennis by ʼn geakkrediteerde gesondheidsorginstansie soos vereis deur die Suid-Afrikaanse Raad op Verpleging (SARV). Een van die take van ‘n verpleegkundedosent van die privaat opleidingskool is om die kliniese begeleiding van verpleegstudente in geakkrediteerde instellings te doen. Omdat verpleging ʼn beroep is waar vaardighede belangrik is, is praktiese inoefening van prosedures en evaluering van die verpleegstudente se vaardigheid daarin noodsaaklik. Die verpleegstudente is heeltyd besig met die pasiënte in die vorm van prosedures waarby die teorie wat in die opleidingskool verkry was, gekorreleer moet word met die prosedure om die hele prentjie te vorm. Dit is dus nodig dat begeleiding van die verpleegstudente gedoen moet word om vaardigheid en toepassing van kennis te verseker. Die navorser het ʼn kwalitatiewe, ondersoekende, beskrywende en kontekstuele studie gedoen waarvan die populasie die geregistreerde dosente van verskeie provinsiale en privaatverpleegskole in die Klein-Karoo en Suid-kaapdistrikte was. Die navorser het gebruik gemaak van ʼn nie-waarskynlike steekproef. Inligtingryke data was ingesamel deur semi-gestruktureerde onderhoude wat aangevul was met veldnotas soos verkry tydens onderhoude. Data-ontleding was reeds begin met data-insameling en Tesch se inhoudsontleding was gebruik om ʼn mening te vorm. ‘n Literatuurkontrole was gedoen om te bepaal wat vorige navorsing oor begeleiding bevind en aanbeveel het. Lincoln en Guba se model was gebruik vir betroubaarheidsversekering volgens die kriteria wat hulle aanbeveel het, naamlik geloofwaardigheid, oordraagbaarheid, betroubaarheid en bevestigbaarheid. Uit die data-ontleding het vier belangrike temas en subtemas te voorskyn gekom. Die temas was dat die verpleegkundedosente aspekte van die begeleiding van verpleegstudente in die gesondheidsorginstansie as positief en ook as negatief beleef. Die wyse waarop die gesondheidsorginstansies bestuur word, het die begeleiding beïnvloed en daar was riglyne voorgestel wat die kliniese personeel en dosente kan rig wanneer hulle betrokke raak by die begeleiding van verpleegstudente. Die begeleiding van verpleegstudente deur verpleegkundedosente, kliniese dosente en die gesondheidsorginstansie se opgeleide personeel, is ʼn belangrike deel van verpleegopleiding en bepaal uiteindelik die kwaliteit van die pasiëntsorg wat verskaf word deur die verpleegkundiges. Die navorser het riglyne daar gestel om die begeleiding van vepleegstudente te rig. Die riglyne moet nou geïmplementeer en getoets word binne die konteks van die bepaalde verpleegskole en dan weer geëvalueer word. Beperkings wat ondervind was in die studie was dat die steekproef ʼn klein groepie verpleegkundedosente op die platteland was, wat veralgemening bemoeilik, veral in die stedelike konteks. Die begeleiding van die verpleegstudente is gedoen met die ingeskrewe verpleegstudente (Die Suid-Afrikaanse Raad op Verpleging Regulasies, Regulasie 2176 en 2175 van 19 November 1993), naamlik die kategorie met die minste status en verantwoordelikheid onder verpleegstudente. Veralgemening na alle kategorieë, veral verpleegstudente besig met professionele verpleegprogramme, mag dus nie sinvol wees nie.
- Full Text:
- Date Issued: 2014
Factors contributing to non adherence among pregnant women on antiretroviral treatment at Amathole District, Eastern Cape
- Authors: Dekeda, Kolelwa Felicia
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Nursing Science)
- Identifier: vital:11921 , http://hdl.handle.net/10353/d1019773
- Description: During the beginning of the HIV epidemic in 1981 25 million people have died. The introduction of ART therefore has promising developments to reduce mortality rates and new infections. Nevertheless there is still a challenge with adherence to ART worldwide and in South Africa. The purpose of the study was to determine the factors contributing to non-adherence to ART among HIV positive pregnant women. The study involved a non- probability sample of 70 HIV pregnant women on ART attending antenatal care clinics at the tertiary hospital and two community health centres,in Buffalo City, Amathole District, Eastern Cape. A coded questionnaire was used as an instrument for data collection. Ethical procedure was followed and a consent form was signed by each participant. Data was collected for a period of two months The demographic data reveals that the majority of the participants were knowledgeable about ART and employed. That is evident in the adherence to ART in all age groups except age 40 and above. The majority of HIV positive pregnant women on ART who participated in the study were single 50% (n=35) which suggests that they may lack emotional support from partners and may have difficulty in disclosing their status. Level of adherence revealed that 27% (n=19) of participants missed ART because of forgetfulness, and 16% (n=12) and others were feeling healthy due to frequent follow ups and complying with the ART. Poor follow up, too sick, side effects pill burden, fear of stigma, lack of finances and taking alcohol hinders the proper management of HIV positive pregnant women and is risky to the unborn baby. HIV positive pregnant women on ART exhibited a good knowledge and use of ART. This is encouraging and should be sustained by continuous community awareness campaigns to empower the communities about HIV/AIDS, PMTCT programme and ART and extensive training of health care providers.
- Full Text:
- Date Issued: 2014
- Authors: Dekeda, Kolelwa Felicia
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Nursing Science)
- Identifier: vital:11921 , http://hdl.handle.net/10353/d1019773
- Description: During the beginning of the HIV epidemic in 1981 25 million people have died. The introduction of ART therefore has promising developments to reduce mortality rates and new infections. Nevertheless there is still a challenge with adherence to ART worldwide and in South Africa. The purpose of the study was to determine the factors contributing to non-adherence to ART among HIV positive pregnant women. The study involved a non- probability sample of 70 HIV pregnant women on ART attending antenatal care clinics at the tertiary hospital and two community health centres,in Buffalo City, Amathole District, Eastern Cape. A coded questionnaire was used as an instrument for data collection. Ethical procedure was followed and a consent form was signed by each participant. Data was collected for a period of two months The demographic data reveals that the majority of the participants were knowledgeable about ART and employed. That is evident in the adherence to ART in all age groups except age 40 and above. The majority of HIV positive pregnant women on ART who participated in the study were single 50% (n=35) which suggests that they may lack emotional support from partners and may have difficulty in disclosing their status. Level of adherence revealed that 27% (n=19) of participants missed ART because of forgetfulness, and 16% (n=12) and others were feeling healthy due to frequent follow ups and complying with the ART. Poor follow up, too sick, side effects pill burden, fear of stigma, lack of finances and taking alcohol hinders the proper management of HIV positive pregnant women and is risky to the unborn baby. HIV positive pregnant women on ART exhibited a good knowledge and use of ART. This is encouraging and should be sustained by continuous community awareness campaigns to empower the communities about HIV/AIDS, PMTCT programme and ART and extensive training of health care providers.
- Full Text:
- Date Issued: 2014
Conflicts in the role of business as a social partner in the South African economy : a study of skills development in the Border-Kei region
- Authors: Delport, Kandi Sue
- Date: 2014
- Subjects: Social responsibility of business -- South Africa , Industries -- Social aspects -- South Africa , Conflict management -- South Africa , Occupational training -- South Africa -- Eastern Cape , Human capital -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape , Labor laws and legislation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3364 , http://hdl.handle.net/10962/d1011784 , Social responsibility of business -- South Africa , Industries -- Social aspects -- South Africa , Conflict management -- South Africa , Occupational training -- South Africa -- Eastern Cape , Human capital -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape , Labor laws and legislation -- South Africa -- Eastern Cape
- Description: This thesis analyses conflicts in the role of business as a social partner in the South African economy by studying skills development in the Border-Kei Region. Skills development is a key component of the South African government’s programme of labour market regulation and is founded on a participatory approach. The skills development framework requires the participation and co-operation of multiple social partners but relies heavily on the role of business in the attainment of national and sectoral skills development objectives. Unfortunately, however, there are significant conflicts in the role which business is expected to play which consequently hinder the efficiency of the framework and the likelihood that that these objectives will be realised. One of the most pertinent examples of these conflicts is the voluntary nature of the skills development framework, which incentivises but does not compel organisations to invest in training and development. Other conflicts include dissonances between national and employer led strategies and organisational disincentives to engage in training and development. This qualitative study uses an interpretive approach to study how and to what extent the Skills Development Act is implemented in selected organisations in Buffalo City as well as studying the issues pertaining to the implementation process. By using a purposive sampling approach, this research includes both primary data in the form of semi-structured interviews and secondary data in the form of documentary sources. The data represents the perspectives of business, labour and government and provides significant depth of insight into the discussions and issues surrounding skills development in Buffalo City. This dissertation argues that South Africa’s vocational training system, institutionalised through appropriate legislation, may not be sufficient to mobilise social partners, and of primary concern in this research – business – to invest in skills development. It suggests that extensive reliance on business is an insufficient way in which to upskill the labour market. However, with few alternatives to this approach, it is subsequently essential that business is encouraged to buy into the collective interest of skills development objectives. This primarily entails overcoming the challenges that embody the framework and increasing state emphasis on skills development.
- Full Text:
- Date Issued: 2014
- Authors: Delport, Kandi Sue
- Date: 2014
- Subjects: Social responsibility of business -- South Africa , Industries -- Social aspects -- South Africa , Conflict management -- South Africa , Occupational training -- South Africa -- Eastern Cape , Human capital -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape , Labor laws and legislation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3364 , http://hdl.handle.net/10962/d1011784 , Social responsibility of business -- South Africa , Industries -- Social aspects -- South Africa , Conflict management -- South Africa , Occupational training -- South Africa -- Eastern Cape , Human capital -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape , Labor laws and legislation -- South Africa -- Eastern Cape
- Description: This thesis analyses conflicts in the role of business as a social partner in the South African economy by studying skills development in the Border-Kei Region. Skills development is a key component of the South African government’s programme of labour market regulation and is founded on a participatory approach. The skills development framework requires the participation and co-operation of multiple social partners but relies heavily on the role of business in the attainment of national and sectoral skills development objectives. Unfortunately, however, there are significant conflicts in the role which business is expected to play which consequently hinder the efficiency of the framework and the likelihood that that these objectives will be realised. One of the most pertinent examples of these conflicts is the voluntary nature of the skills development framework, which incentivises but does not compel organisations to invest in training and development. Other conflicts include dissonances between national and employer led strategies and organisational disincentives to engage in training and development. This qualitative study uses an interpretive approach to study how and to what extent the Skills Development Act is implemented in selected organisations in Buffalo City as well as studying the issues pertaining to the implementation process. By using a purposive sampling approach, this research includes both primary data in the form of semi-structured interviews and secondary data in the form of documentary sources. The data represents the perspectives of business, labour and government and provides significant depth of insight into the discussions and issues surrounding skills development in Buffalo City. This dissertation argues that South Africa’s vocational training system, institutionalised through appropriate legislation, may not be sufficient to mobilise social partners, and of primary concern in this research – business – to invest in skills development. It suggests that extensive reliance on business is an insufficient way in which to upskill the labour market. However, with few alternatives to this approach, it is subsequently essential that business is encouraged to buy into the collective interest of skills development objectives. This primarily entails overcoming the challenges that embody the framework and increasing state emphasis on skills development.
- Full Text:
- Date Issued: 2014
An investigation of the XMOS XSl architecture as a platform for development of audio control standards
- Authors: Dibley, James
- Date: 2014
- Subjects: Microcontrollers -- Research , Streaming audio -- Standards -- Research , Computer sound processing -- Research , Computer network protocols -- Standards -- Research , Communication -- Technological innovations -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4694 , http://hdl.handle.net/10962/d1011789 , Microcontrollers -- Research , Streaming audio -- Standards -- Research , Computer sound processing -- Research , Computer network protocols -- Standards -- Research , Communication -- Technological innovations -- Research
- Description: This thesis investigates the feasiblity of using a new microcontroller architecture, the XMOS XS1, in the research and development of control standards for audio distribution networks. This investigation is conducted in the context of an emerging audio distribution network standard, Ethernet Audio/Video Bridging (`Ethernet AVB'), and an emerging audio control standard, AES-64. The thesis describes these emerging standards, the XMOS XS1 architecture (including its associated programming language, XC), and the open-source implementation of an Ethernet AVB streaming audio device based on the XMOS XS1 architecture. It is shown how the XMOS XS1 architecture and its associated features, focusing on the XC language's mechanisms for concurrency, event-driven programming, and integration of C software modules, enable a powerful implementation of the AES-64 control standard. Feasibility is demonstrated by the implementation of an AES-64 protocol stack and its integration into an XMOS XS1-based Ethernet AVB streaming audio device, providing control of Ethernet AVB features and audio hardware, as well as implementations of advanced AES-64 control mechanisms. It is demonstrated that the XMOS XS1 architecture is a compelling platform for the development of audio control standards, and has enabled the implementation of AES-64 connection management and control over standards-compliant Ethernet AVB streaming audio devices where no such implementation previously existed. The research additionally describes a linear design method for applications based on the XMOS XS1 architecture, and provides a baseline implementation reference for the AES-64 control standard where none previously existed.
- Full Text:
- Date Issued: 2014
- Authors: Dibley, James
- Date: 2014
- Subjects: Microcontrollers -- Research , Streaming audio -- Standards -- Research , Computer sound processing -- Research , Computer network protocols -- Standards -- Research , Communication -- Technological innovations -- Research
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4694 , http://hdl.handle.net/10962/d1011789 , Microcontrollers -- Research , Streaming audio -- Standards -- Research , Computer sound processing -- Research , Computer network protocols -- Standards -- Research , Communication -- Technological innovations -- Research
- Description: This thesis investigates the feasiblity of using a new microcontroller architecture, the XMOS XS1, in the research and development of control standards for audio distribution networks. This investigation is conducted in the context of an emerging audio distribution network standard, Ethernet Audio/Video Bridging (`Ethernet AVB'), and an emerging audio control standard, AES-64. The thesis describes these emerging standards, the XMOS XS1 architecture (including its associated programming language, XC), and the open-source implementation of an Ethernet AVB streaming audio device based on the XMOS XS1 architecture. It is shown how the XMOS XS1 architecture and its associated features, focusing on the XC language's mechanisms for concurrency, event-driven programming, and integration of C software modules, enable a powerful implementation of the AES-64 control standard. Feasibility is demonstrated by the implementation of an AES-64 protocol stack and its integration into an XMOS XS1-based Ethernet AVB streaming audio device, providing control of Ethernet AVB features and audio hardware, as well as implementations of advanced AES-64 control mechanisms. It is demonstrated that the XMOS XS1 architecture is a compelling platform for the development of audio control standards, and has enabled the implementation of AES-64 connection management and control over standards-compliant Ethernet AVB streaming audio devices where no such implementation previously existed. The research additionally describes a linear design method for applications based on the XMOS XS1 architecture, and provides a baseline implementation reference for the AES-64 control standard where none previously existed.
- Full Text:
- Date Issued: 2014
Factors contributing to national and provincial government debt accumulation in the Eastern Cape
- Authors: Dilika, Zanele Victress
- Date: 2014
- Subjects: Debts, Public -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/6095 , vital:21038
- Description: The research took the form of a qualitative interpretative case study focusing on the study sample of 9 municipal officials responsible for monitoring the payment of government debt as the consumer type. Data was collected through face to face interviews by means of completing the questionnaire based on the responses from the respondent. The study examined the underlying and related causes of non-payment of government debt. The study revealed that municipalities in the Eastern Cape lack support from the other spheres of government in ensuring timeous payments of outstanding debt. Growth in debtors indicated the failure by the municipalities to implement proper debt management processes and the lack of political will to collect debts. The study recommended that municipalities need to waive interest on disputed debt and the debt in that regard be reported on the suspense account to avoid over estimation or debt that might not be recovered in the long run.
- Full Text:
- Date Issued: 2014
- Authors: Dilika, Zanele Victress
- Date: 2014
- Subjects: Debts, Public -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/6095 , vital:21038
- Description: The research took the form of a qualitative interpretative case study focusing on the study sample of 9 municipal officials responsible for monitoring the payment of government debt as the consumer type. Data was collected through face to face interviews by means of completing the questionnaire based on the responses from the respondent. The study examined the underlying and related causes of non-payment of government debt. The study revealed that municipalities in the Eastern Cape lack support from the other spheres of government in ensuring timeous payments of outstanding debt. Growth in debtors indicated the failure by the municipalities to implement proper debt management processes and the lack of political will to collect debts. The study recommended that municipalities need to waive interest on disputed debt and the debt in that regard be reported on the suspense account to avoid over estimation or debt that might not be recovered in the long run.
- Full Text:
- Date Issued: 2014
The potential for solar water heaters in urban development in KwaZulu-Natal
- Authors: Dlepu, Thobisa Miranda
- Date: 2014
- Subjects: Solar water heaters , Solar heating , Renewable energy sources
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9251 , http://hdl.handle.net/10948/d1021184
- Description: The study found that investing in solar water heater system (SWH) would be an economically, socially and environmentally viable option to implement within urban households; in which the hot water demand, volume of hot water consumption, water heating costs, and electricity tariffs are high. Investing in solar water heater technology should be the key focus of South African government; in order to enhance the wellbeing of the ordinary citizens. The study made use of the qualitative research approach to investigate solar water heater drivers and barriers; from the perspective of energy consumers. This will be achieved by focusing on the major drivers and barriers that consumers consider when making decisions on adoption of solar water heater system. It is believed that solar water heater drivers and barriers substantially influence the potential and urban development thereof. Solar heat is utilized in the residential sector for heating water for bathing, cleaning, washing and cooking food, but its availability is limited (Arora & Arora, 2013). Renewable energy has become a wild card internationally and regionally because of the technical, economic and environmental barriers affecting the disadvantaged individuals.
- Full Text:
- Date Issued: 2014
- Authors: Dlepu, Thobisa Miranda
- Date: 2014
- Subjects: Solar water heaters , Solar heating , Renewable energy sources
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9251 , http://hdl.handle.net/10948/d1021184
- Description: The study found that investing in solar water heater system (SWH) would be an economically, socially and environmentally viable option to implement within urban households; in which the hot water demand, volume of hot water consumption, water heating costs, and electricity tariffs are high. Investing in solar water heater technology should be the key focus of South African government; in order to enhance the wellbeing of the ordinary citizens. The study made use of the qualitative research approach to investigate solar water heater drivers and barriers; from the perspective of energy consumers. This will be achieved by focusing on the major drivers and barriers that consumers consider when making decisions on adoption of solar water heater system. It is believed that solar water heater drivers and barriers substantially influence the potential and urban development thereof. Solar heat is utilized in the residential sector for heating water for bathing, cleaning, washing and cooking food, but its availability is limited (Arora & Arora, 2013). Renewable energy has become a wild card internationally and regionally because of the technical, economic and environmental barriers affecting the disadvantaged individuals.
- Full Text:
- Date Issued: 2014
A survey of youth development projects in the Department of Social Development in the province of the Eastern Cape: a management perspective
- Dliwayo, Mziwodumo Archibald
- Authors: Dliwayo, Mziwodumo Archibald
- Date: 2014
- Subjects: Youth in development -- South Africa -- Eastern Cape , Economic development projects , Youth -- Services for
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/4429 , vital:20600
- Description: The objective of this research is to establish how non-adherence of Amathole District development projects to the Department of Social Development’s Community Development Systems and Operational Manual has contributed to failure of these projects. The background to this research lies in the deliberate policy efforts of the post 1994 democratic dispensation in South Africa to drive development through community-based development approaches. Explicitly pro-poor public policies, development plans and fiscal frameworks were anchored on the concept of community empowerment. The Reconstruction and Development Programme was the first such policy and strategy framework that sought to enshrine the principles of community empowerment and participation. As such, Provincial and Local government are often seen as key strategic drivers of community empowerment initiatives and interventions. South Africa’s governance model is still evolving, but it is clearly committed to local development and service delivery through a decentralised system of government that espouses community involvement. Government strategy has been heavily focused on speed and delivery in order to deal with the historical socio-economic backlogs it inherited. In the focus area of youth development projects, one recognises that poor management has dramatically reduced the effectiveness of many interventions. This research explores how non-adherence of these projects to policy guidelines set out in the Community Development Systems and Operations Manual has contributed to their failure. The research does this by looking at the various management procedures that are supposed to be undertaken during both the initial planning phases and during the subsequent implementation phases of youth development projects. Actual methodologies are compared against this standard. The research is undoubtedly a contribution to the field of strategic management of youth development initiatives which have as their primary intention the reduction of youth unemployment. Research surveys on this topic are limited, and the objective is to enrich the discourse on effective youth projects management practices.
- Full Text:
- Date Issued: 2014
- Authors: Dliwayo, Mziwodumo Archibald
- Date: 2014
- Subjects: Youth in development -- South Africa -- Eastern Cape , Economic development projects , Youth -- Services for
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/4429 , vital:20600
- Description: The objective of this research is to establish how non-adherence of Amathole District development projects to the Department of Social Development’s Community Development Systems and Operational Manual has contributed to failure of these projects. The background to this research lies in the deliberate policy efforts of the post 1994 democratic dispensation in South Africa to drive development through community-based development approaches. Explicitly pro-poor public policies, development plans and fiscal frameworks were anchored on the concept of community empowerment. The Reconstruction and Development Programme was the first such policy and strategy framework that sought to enshrine the principles of community empowerment and participation. As such, Provincial and Local government are often seen as key strategic drivers of community empowerment initiatives and interventions. South Africa’s governance model is still evolving, but it is clearly committed to local development and service delivery through a decentralised system of government that espouses community involvement. Government strategy has been heavily focused on speed and delivery in order to deal with the historical socio-economic backlogs it inherited. In the focus area of youth development projects, one recognises that poor management has dramatically reduced the effectiveness of many interventions. This research explores how non-adherence of these projects to policy guidelines set out in the Community Development Systems and Operations Manual has contributed to their failure. The research does this by looking at the various management procedures that are supposed to be undertaken during both the initial planning phases and during the subsequent implementation phases of youth development projects. Actual methodologies are compared against this standard. The research is undoubtedly a contribution to the field of strategic management of youth development initiatives which have as their primary intention the reduction of youth unemployment. Research surveys on this topic are limited, and the objective is to enrich the discourse on effective youth projects management practices.
- Full Text:
- Date Issued: 2014
The impact of social network sites on written isiXhosa : a case study of a rural and an urban high school
- Authors: Dlutu, Bongiwe Agrienette
- Date: 2014
- Subjects: Online social networks -- South Africa -- Eastern Cape -- Use studies Mobile communication systems -- Social aspects -- South Africa -- Eastern Cape Interpersonal communication -- Technological innovations -- Social aspects -- South Africa -- Eastern Cape Mobile communication systems in education -- South Africa -- Eastern Cape Teaching -- South Africa -- Eastern Cape -- Aids and devices Xhosa language -- Study and teaching (Secondary) -- South Africa -- Eastern Cape Electronic mail systems -- South Africa -- Eastern Cape -- Slang Smartphones -- South Africa -- Use studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3629 , http://hdl.handle.net/10962/d1011826
- Description: The use of cellphones has increased all over the world. That invites many academics to conduct research on the usage of these devices, especially by young people, since young people join Social Network Sites (Facebook, Mxit, 2go, Whatsapp) and use a shorthand language. Most studies are related to the use of English and other languages that are recognised by computer software. There are few studies, if any, that have been done in relation to the use of African Languages on these sites. This research therefore aims to seek to explore the use of African Languages, especially isiXhosa, in assessing how technology might help in language development through the usage of SNSs that learners already use to equip them with educational material in their mother tongue. This study was conducted in two high schools, Nogemane Senior Secondary School in a disadvantaged and remote rural community with limited access to additional educational material such as magazines, newspapers, and television. The school also lacks basic study materials such as textbooks from the Education Department and they have no access to a library and laboratory. They also only have very few subjects to choose from. Nombulelo Senior Secondary School is in Grahamstown. This school has good infrastructure and learners have access to different technological devices and they can access libraries. What is common between learners in both schools is that they are all doing isiXhosa as a first language and are using SNSs to interact with each other. This study has found that learners enjoy using SNSs rather than reading the printed books. Furthermore, they enjoy and prefer interacting in isiXhosa in their conversations. Learners also use the web to post and show their creative writing, regardless of the shorthand form writing they use on the SNSs. This study has found that learners are not well equipped with basic isiXhosa skills when reaching the FET phase. They lack the understanding of standard isiXhosa idioms and proverbs. That clearly means that they are equipped in the more modern forms of literature rather than the traditional oral forms. IsiXhosa teachers also see SNSs as the better platform to engage with learners and they suggest that there must be a section in the subjects at school that teaches about cyber bullying and being safe online. This thesis also presents examples of new and contemporary forms of SNS-speak that are used by learners in both the rural and urban schools. This study is more concerned with SNSs for literacy development and to assess whether the shorthand writing has negative or positive effects in writing isiXhosa. This is done against the backdrop of a literature review which explores new literacies, computer mediated communication, social identity models as well as language policy and planning.
- Full Text:
- Date Issued: 2014
- Authors: Dlutu, Bongiwe Agrienette
- Date: 2014
- Subjects: Online social networks -- South Africa -- Eastern Cape -- Use studies Mobile communication systems -- Social aspects -- South Africa -- Eastern Cape Interpersonal communication -- Technological innovations -- Social aspects -- South Africa -- Eastern Cape Mobile communication systems in education -- South Africa -- Eastern Cape Teaching -- South Africa -- Eastern Cape -- Aids and devices Xhosa language -- Study and teaching (Secondary) -- South Africa -- Eastern Cape Electronic mail systems -- South Africa -- Eastern Cape -- Slang Smartphones -- South Africa -- Use studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3629 , http://hdl.handle.net/10962/d1011826
- Description: The use of cellphones has increased all over the world. That invites many academics to conduct research on the usage of these devices, especially by young people, since young people join Social Network Sites (Facebook, Mxit, 2go, Whatsapp) and use a shorthand language. Most studies are related to the use of English and other languages that are recognised by computer software. There are few studies, if any, that have been done in relation to the use of African Languages on these sites. This research therefore aims to seek to explore the use of African Languages, especially isiXhosa, in assessing how technology might help in language development through the usage of SNSs that learners already use to equip them with educational material in their mother tongue. This study was conducted in two high schools, Nogemane Senior Secondary School in a disadvantaged and remote rural community with limited access to additional educational material such as magazines, newspapers, and television. The school also lacks basic study materials such as textbooks from the Education Department and they have no access to a library and laboratory. They also only have very few subjects to choose from. Nombulelo Senior Secondary School is in Grahamstown. This school has good infrastructure and learners have access to different technological devices and they can access libraries. What is common between learners in both schools is that they are all doing isiXhosa as a first language and are using SNSs to interact with each other. This study has found that learners enjoy using SNSs rather than reading the printed books. Furthermore, they enjoy and prefer interacting in isiXhosa in their conversations. Learners also use the web to post and show their creative writing, regardless of the shorthand form writing they use on the SNSs. This study has found that learners are not well equipped with basic isiXhosa skills when reaching the FET phase. They lack the understanding of standard isiXhosa idioms and proverbs. That clearly means that they are equipped in the more modern forms of literature rather than the traditional oral forms. IsiXhosa teachers also see SNSs as the better platform to engage with learners and they suggest that there must be a section in the subjects at school that teaches about cyber bullying and being safe online. This thesis also presents examples of new and contemporary forms of SNS-speak that are used by learners in both the rural and urban schools. This study is more concerned with SNSs for literacy development and to assess whether the shorthand writing has negative or positive effects in writing isiXhosa. This is done against the backdrop of a literature review which explores new literacies, computer mediated communication, social identity models as well as language policy and planning.
- Full Text:
- Date Issued: 2014
Development of polymer templates for ZnO nanorods
- Authors: Dobson, Stephen Robert
- Date: 2014
- Subjects: Polymers , Semiconductor industry
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10556 , http://hdl.handle.net/10948/d1020805
- Description: One of the biggest challenges for the semiconductor industry is the development of nanofabrication techniques that allow for the fabrication of structures on a scale tens of nanometers in size. This provides greater potential functionality at reduced costs. Established conventional techniques, such as photolithography, are unable to achieve features below 30 nm due to the inherent limitations of the wavelength of light sources currently available. For this reason block copolymers received considerable attention in order to overcome these challenges in lithographic technology. Block copolymers have an inherent processing advantage of self assembling into various nanoscopic structures such as spheres, cylinders and lamellae amongst others on a scale below 50 nm. The dimensions and structures are readily tuneable based on molecular weights (Mw) and compositions of the copolymers. However, to be usable within industry a great deal more research still needs to be conducted on the use and nature of block copolymers. In this study the block copolymer of poly(styrene-block-methylmethacrylate) (PS-b-PMMA) was investigated as a potential nano-mask for semiconductor growth. Research was conducted on thin films of PS-b-PMMA by altering the parameters influencing the kinetics and thermodynamic effects on the thin films, in order to produce a structure of cylinders of PMMA perpendicular to the substrate within a PS matrix on a silicon (Si) substrate. It is shown that thermally annealing the PS-b-PMMA thin films under conditions where there is no preferential interaction of the substrate or open surface with either components of the block copolymer (i.e. PS or PMMA with Si or ambient) and at an appropriate thin film thickness, perpendicular cylinders of PMMA within a PS matrix form in the thin films. The determined ideal thin film thickness is 32 nm, with non-preferential interaction attained between block and substrate by coating a poly(styrene-random-methylmethacrylate) (PS-r-PMMA) on the Si substrate and annealing within a vacuum. Additionally, acetic acid, as a known selective solvent of PMMA, is used to further process the thin film of PS-b-PMMA. Thus a final PS nano-mask containing pores with a diameter tens of nanometers in size is produced. The pores are shown to have an average diameter of 13.5 nm. Measurements were taken throughout the investigation using a scanning probe microscope (SPM) to determine surface topography and phase morphology of the PS-b-PMMA thin films. X-ray reflectometry (XRR) is used to measure film thickness. The research in this study shows that thin films of PS containing hexagonally arranged pores can be produced and could find potential use as a nano-mask for semiconductor growth.
- Full Text:
- Date Issued: 2014
- Authors: Dobson, Stephen Robert
- Date: 2014
- Subjects: Polymers , Semiconductor industry
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10556 , http://hdl.handle.net/10948/d1020805
- Description: One of the biggest challenges for the semiconductor industry is the development of nanofabrication techniques that allow for the fabrication of structures on a scale tens of nanometers in size. This provides greater potential functionality at reduced costs. Established conventional techniques, such as photolithography, are unable to achieve features below 30 nm due to the inherent limitations of the wavelength of light sources currently available. For this reason block copolymers received considerable attention in order to overcome these challenges in lithographic technology. Block copolymers have an inherent processing advantage of self assembling into various nanoscopic structures such as spheres, cylinders and lamellae amongst others on a scale below 50 nm. The dimensions and structures are readily tuneable based on molecular weights (Mw) and compositions of the copolymers. However, to be usable within industry a great deal more research still needs to be conducted on the use and nature of block copolymers. In this study the block copolymer of poly(styrene-block-methylmethacrylate) (PS-b-PMMA) was investigated as a potential nano-mask for semiconductor growth. Research was conducted on thin films of PS-b-PMMA by altering the parameters influencing the kinetics and thermodynamic effects on the thin films, in order to produce a structure of cylinders of PMMA perpendicular to the substrate within a PS matrix on a silicon (Si) substrate. It is shown that thermally annealing the PS-b-PMMA thin films under conditions where there is no preferential interaction of the substrate or open surface with either components of the block copolymer (i.e. PS or PMMA with Si or ambient) and at an appropriate thin film thickness, perpendicular cylinders of PMMA within a PS matrix form in the thin films. The determined ideal thin film thickness is 32 nm, with non-preferential interaction attained between block and substrate by coating a poly(styrene-random-methylmethacrylate) (PS-r-PMMA) on the Si substrate and annealing within a vacuum. Additionally, acetic acid, as a known selective solvent of PMMA, is used to further process the thin film of PS-b-PMMA. Thus a final PS nano-mask containing pores with a diameter tens of nanometers in size is produced. The pores are shown to have an average diameter of 13.5 nm. Measurements were taken throughout the investigation using a scanning probe microscope (SPM) to determine surface topography and phase morphology of the PS-b-PMMA thin films. X-ray reflectometry (XRR) is used to measure film thickness. The research in this study shows that thin films of PS containing hexagonally arranged pores can be produced and could find potential use as a nano-mask for semiconductor growth.
- Full Text:
- Date Issued: 2014
Ethanol production from lignocellulosic sugarcane leaves and tops
- Authors: Dodo, Charlie Marembu
- Date: 2014
- Subjects: Biomass energy , Ethanol as fuel , Lignocellulose
- Language: English
- Type: Thesis , Masters , MSc (Chemistry)
- Identifier: vital:11347 , http://hdl.handle.net/10353/d1019839 , Biomass energy , Ethanol as fuel , Lignocellulose
- Description: Various methods for the production of bioethanol using different feedstocks have been researched on. In most work on bioethanol synthesis from sugar cane, tops and leaves have been regarded as waste and generally removed and thrown away. In this work, lignocellulosic sugarcane leaves and tops were not discarded but instead used as biomass to evaluate their hydrolyzate content. The leaves and tops were hydrolysed using different methods, namely concentrated acid, dilute acid pre-treatment with subsequent enzyme hydrolysis and compared with a combination of oxidative alkali pretreatment and enzyme hydrolysis. Subsequent fermentation of the hydrolyzates into bioethanol was done using the yeast saccharomyces cerevisae. Acid hydrolysis has the problem of producing inhibitors, which have to be removed and this was done using overliming with calcium hydroxide and compared to sodium hydroxide neutralization. Oxidative alkali pre-treatment with enzyme hydrolysis gave the highest yields of fermentable sugars of 38% (g/g) using 7% (v/v) peroxide pre-treated biomass than 36% (g/g) for 5% (v/v) with the least inhibitors. Concentrated and dilute acid hydrolysis each gave yields of25% (g/g) and 22% (g/g) yields respectively although for acid a neutralization step was necessary and resulted in dilution. Alkaline neutralization of acid hydrolyzates using sodium hydroxide resulted in less dilution and loss of fermentable sugars as compared to overliming. Higher yields of bioethanol, 13.7 (g/l) were obtained from enzyme hydrolyzates than 6.9 (g/l) bioethanol from dilute acid hydrolyzates. There was more bioethanol yield 13.7 (g/l) after 72h of fermentation with the yeast than 7.0 (g/l) bioethanol after 24h. However, the longer fermentation period diminishes the value of the increase in yield by lowering the efficiency of the process.
- Full Text:
- Date Issued: 2014
- Authors: Dodo, Charlie Marembu
- Date: 2014
- Subjects: Biomass energy , Ethanol as fuel , Lignocellulose
- Language: English
- Type: Thesis , Masters , MSc (Chemistry)
- Identifier: vital:11347 , http://hdl.handle.net/10353/d1019839 , Biomass energy , Ethanol as fuel , Lignocellulose
- Description: Various methods for the production of bioethanol using different feedstocks have been researched on. In most work on bioethanol synthesis from sugar cane, tops and leaves have been regarded as waste and generally removed and thrown away. In this work, lignocellulosic sugarcane leaves and tops were not discarded but instead used as biomass to evaluate their hydrolyzate content. The leaves and tops were hydrolysed using different methods, namely concentrated acid, dilute acid pre-treatment with subsequent enzyme hydrolysis and compared with a combination of oxidative alkali pretreatment and enzyme hydrolysis. Subsequent fermentation of the hydrolyzates into bioethanol was done using the yeast saccharomyces cerevisae. Acid hydrolysis has the problem of producing inhibitors, which have to be removed and this was done using overliming with calcium hydroxide and compared to sodium hydroxide neutralization. Oxidative alkali pre-treatment with enzyme hydrolysis gave the highest yields of fermentable sugars of 38% (g/g) using 7% (v/v) peroxide pre-treated biomass than 36% (g/g) for 5% (v/v) with the least inhibitors. Concentrated and dilute acid hydrolysis each gave yields of25% (g/g) and 22% (g/g) yields respectively although for acid a neutralization step was necessary and resulted in dilution. Alkaline neutralization of acid hydrolyzates using sodium hydroxide resulted in less dilution and loss of fermentable sugars as compared to overliming. Higher yields of bioethanol, 13.7 (g/l) were obtained from enzyme hydrolyzates than 6.9 (g/l) bioethanol from dilute acid hydrolyzates. There was more bioethanol yield 13.7 (g/l) after 72h of fermentation with the yeast than 7.0 (g/l) bioethanol after 24h. However, the longer fermentation period diminishes the value of the increase in yield by lowering the efficiency of the process.
- Full Text:
- Date Issued: 2014
The effect of outsourcing a South African automotive company's material handling activities on its operational performance
- Authors: Dolley-Ryneveld, Mieshkah
- Date: 2014
- Subjects: Contracting out -- South Africa , Industrial management -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8936 , http://hdl.handle.net/10948/d1021202
- Description: Outsourcing has become a popular trend in the last two decades and has been applied in both non-essential and critical business functions. It has been viewed as a vital source of competitive advantage and is expected to remain an important component in future business strategies. Over the past few years, the outsourcing of logistics functions in particular has shown strong growth. Thus, an abundance of research on the outsourcing of logistics is available. However, there has been little research on the outsourcing of material handling activities as a sub-component of logistics, nor its effect on a company’s operational performance. The purpose of this treatise is to determine the effects of outsourcing a South African automotive company’s material handling activities on its operational performance. It further aims to compare the company’s expected outcomes for outsourcing with actual outcomes. In addition, the factors which contributed positively and negatively to the operation of the outsourced material handling activities at the company, are established. The automotive company in this study is situated in Port Elizabeth, but due to confidentiality reasons the name of the company is not mentioned in the study. The study consists of a literature review on the background of outsourcing, outsourcing theories, outsourcing trends, important outsourcing considerations and gaps in outsourcing research. Primary data, collected through the use of a questionnaire to determine the effects outsourcing has on the company’s operational performance, is collected, reported and analysed in the study. The performance criteria used to determine these effects are: cost; delivery speed and reliability; flexibility; quality; the outsourcing relationship and the management of the outsourcing relationship. The study results reveal that the operational performance of the company remained the same after outsourcing.
- Full Text:
- Date Issued: 2014
- Authors: Dolley-Ryneveld, Mieshkah
- Date: 2014
- Subjects: Contracting out -- South Africa , Industrial management -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8936 , http://hdl.handle.net/10948/d1021202
- Description: Outsourcing has become a popular trend in the last two decades and has been applied in both non-essential and critical business functions. It has been viewed as a vital source of competitive advantage and is expected to remain an important component in future business strategies. Over the past few years, the outsourcing of logistics functions in particular has shown strong growth. Thus, an abundance of research on the outsourcing of logistics is available. However, there has been little research on the outsourcing of material handling activities as a sub-component of logistics, nor its effect on a company’s operational performance. The purpose of this treatise is to determine the effects of outsourcing a South African automotive company’s material handling activities on its operational performance. It further aims to compare the company’s expected outcomes for outsourcing with actual outcomes. In addition, the factors which contributed positively and negatively to the operation of the outsourced material handling activities at the company, are established. The automotive company in this study is situated in Port Elizabeth, but due to confidentiality reasons the name of the company is not mentioned in the study. The study consists of a literature review on the background of outsourcing, outsourcing theories, outsourcing trends, important outsourcing considerations and gaps in outsourcing research. Primary data, collected through the use of a questionnaire to determine the effects outsourcing has on the company’s operational performance, is collected, reported and analysed in the study. The performance criteria used to determine these effects are: cost; delivery speed and reliability; flexibility; quality; the outsourcing relationship and the management of the outsourcing relationship. The study results reveal that the operational performance of the company remained the same after outsourcing.
- Full Text:
- Date Issued: 2014