Arguing from identity: ontology to advocacy in Charles Taylor's political thought
- Authors: Sadian, Samuel Dominic
- Date: 2009
- Subjects: Taylor, Charles, 1931- -- Political and social views Taylor, Charles, 1931- -- Criticism and interpretation Cultural pluralism Political culture Identity (Philosophical concept) Ontology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2829 , http://hdl.handle.net/10962/d1003039
- Description: In this thesis I discuss three normative claims that I take to be central elements of Charles Taylor’s political thought. The first of these is Taylor’s contention that, in contemporary pluralistic societies, justifying socially prevailing norms by appealing to universally binding moral values is unlikely to promote social solidarity. Because this approach tends to downplay the goods that people realise through membership in particular associations, Taylor believes we must adopt a model of justification that does not prioritise universal over particular goods if we are to further social co-operation. A second claim Taylor defends is that commitment to the liberal value of collective self-rule implies treating patriotically motivated public service as a non-instrumental good. We should not, Taylor argues, regard collective association as nothing more than a means to satisfying private goals. Taylor advances a third claim, that is, he maintains that liberal toleration for diverse ways of life may require a perfectionist state that supports particularistic ways of life when they are threatened by decline. I offer a qualified defence of the first two claims, but suggest that the third is less compelling. I attempt to do this by evaluating Taylor’s claims against the standards of lucid argumentation that he himself lays down. In discussing social and political norms, which he describes as “advocacy” issues, Taylor argues that our normative commitments necessarily rely on an underlying social ontology. More specifically, Taylor argues that the political values we defend are those that enable us to secure the interests we have as the bearers of an identity possessing both individual and collective dimensions. In setting out the conditions that favour integrated and free identity formation we may thereby reach a clearer understanding of the political norms that we wish to endorse. I argue that, while Taylor’s ontological reflections might well incline us to accept his model of justification and his account of patriotic social commitment, they do not of themselves dispose us to accept state perfectionism.
- Full Text:
- Date Issued: 2009
- Authors: Sadian, Samuel Dominic
- Date: 2009
- Subjects: Taylor, Charles, 1931- -- Political and social views Taylor, Charles, 1931- -- Criticism and interpretation Cultural pluralism Political culture Identity (Philosophical concept) Ontology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2829 , http://hdl.handle.net/10962/d1003039
- Description: In this thesis I discuss three normative claims that I take to be central elements of Charles Taylor’s political thought. The first of these is Taylor’s contention that, in contemporary pluralistic societies, justifying socially prevailing norms by appealing to universally binding moral values is unlikely to promote social solidarity. Because this approach tends to downplay the goods that people realise through membership in particular associations, Taylor believes we must adopt a model of justification that does not prioritise universal over particular goods if we are to further social co-operation. A second claim Taylor defends is that commitment to the liberal value of collective self-rule implies treating patriotically motivated public service as a non-instrumental good. We should not, Taylor argues, regard collective association as nothing more than a means to satisfying private goals. Taylor advances a third claim, that is, he maintains that liberal toleration for diverse ways of life may require a perfectionist state that supports particularistic ways of life when they are threatened by decline. I offer a qualified defence of the first two claims, but suggest that the third is less compelling. I attempt to do this by evaluating Taylor’s claims against the standards of lucid argumentation that he himself lays down. In discussing social and political norms, which he describes as “advocacy” issues, Taylor argues that our normative commitments necessarily rely on an underlying social ontology. More specifically, Taylor argues that the political values we defend are those that enable us to secure the interests we have as the bearers of an identity possessing both individual and collective dimensions. In setting out the conditions that favour integrated and free identity formation we may thereby reach a clearer understanding of the political norms that we wish to endorse. I argue that, while Taylor’s ontological reflections might well incline us to accept his model of justification and his account of patriotic social commitment, they do not of themselves dispose us to accept state perfectionism.
- Full Text:
- Date Issued: 2009
Aspects of memory in the sculptural work of Jane Alexander 1982-2009
- Authors: Nicol, Tracy-Lee
- Date: 2009
- Subjects: Alexander, Jane, 1959- Collective memory -- South Africa Memory in art Women artists -- South Africa Art, African -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2417 , http://hdl.handle.net/10962/d1002213
- Description: Over three decades of research has shown that memories have significant effect on the behaviour, attitudes, beliefs, and identities of individuals and collectives, revealing also how experiences of trauma and acts of narrativisation have pertinence to the ways in which memories are stored and reconstructed. In this thesis a link is developed between memory, trauma, narrativisation processes and the interpretation of works by Jane Alexander, a contemporary artist whose work is informed by observations about South African life. Alexander’s sculptures are revealed to be not only important vessels of collective memories and experiences, but also evocations of individuals’ countermemories and traumas that remain unarticulated and invisible. Through an exploration of the workings of memory and its relation to her art, it is revealed how the past continues to exert its influence on many of South Africa’s present sociopolitical concerns and interpersonal dynamics. Indeed constantly changing memories have a significant effect on future generations’ perceptions of, and connectedness to, the past. While theories about memory have been deployed in Art History as well as the Humanities in general, Alexander’s work has not previously been considered in light of the influence of these ideas. This thesis thus contributes a new dimension to literature on the artist.
- Full Text:
- Date Issued: 2009
- Authors: Nicol, Tracy-Lee
- Date: 2009
- Subjects: Alexander, Jane, 1959- Collective memory -- South Africa Memory in art Women artists -- South Africa Art, African -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2417 , http://hdl.handle.net/10962/d1002213
- Description: Over three decades of research has shown that memories have significant effect on the behaviour, attitudes, beliefs, and identities of individuals and collectives, revealing also how experiences of trauma and acts of narrativisation have pertinence to the ways in which memories are stored and reconstructed. In this thesis a link is developed between memory, trauma, narrativisation processes and the interpretation of works by Jane Alexander, a contemporary artist whose work is informed by observations about South African life. Alexander’s sculptures are revealed to be not only important vessels of collective memories and experiences, but also evocations of individuals’ countermemories and traumas that remain unarticulated and invisible. Through an exploration of the workings of memory and its relation to her art, it is revealed how the past continues to exert its influence on many of South Africa’s present sociopolitical concerns and interpersonal dynamics. Indeed constantly changing memories have a significant effect on future generations’ perceptions of, and connectedness to, the past. While theories about memory have been deployed in Art History as well as the Humanities in general, Alexander’s work has not previously been considered in light of the influence of these ideas. This thesis thus contributes a new dimension to literature on the artist.
- Full Text:
- Date Issued: 2009
Aspects of the ecology and biology of the isopod, Exosphaeroma hylocoetes, (Barnard, 1940) in three temporarily open/closed southern African estuaries
- Authors: Henninger, Tony Oskar
- Date: 2009
- Subjects: Estuaries -- South Africa -- Eastern Cape Estuarine ecology -- South Africa -- Eastern Cape Isopoda -- South Africa -- Eastern Cape Estuarine biology -- South Africa -- Eastern Cape Ruppia maritima
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5640 , http://hdl.handle.net/10962/d1005322
- Description: Temporarily open/closed estuaries (TOCE’s) are the numerically dominant type of estuary accounting for ≈ 70 % of all estuaries along the South African coastline. Despite their numerical dominance, aspects of the biology of organisms within these systems, particularly macrocrustacea remain poorly understood. This study firstly assessed the abundance and biomass of the most common isopod, Exosphaeroma hylocoetes, in three Eastern Cape TOCE’s, (the West Kleinemonde, East Kleinemonde and Kasouga Estuaries), and their response to mouth breaching events. This study was followed by aspects of the biology of the isopod including their utilisation of submerged macrophytes as a refuge from predation and/or possible food source, as well as the growth rates of the isopods in the laboratory under different environmental conditions. Mean isopod abundances and biomasses ranged between 0 and 4 791 ind. m⁻² and 0 and 9.65 mg dwt. m⁻² in the West Kleinemonde Estuary and between 0 and 108 ind. m⁻² and 0 and 0.318 mg dwt. m⁻² in the nearby East Kleinemonde Estuary. In the Kasouga Estuary, the values ranged between 0 and 3 650 ind. m⁻² and 0 and 5.105 mg dwt. m⁻². Temporal and spatial changes in the abundance and biomass of E. hylocoetes within the three systems was primarily linked to mouth phase, with populations declining when the mouth was open and to a lesser extent, seasonality. In all three estuaries maximum isopod abundances and biomasses were recorded in their middle and upper reaches, which could be ascribed to the presence of submerged macrophytes particularly Ruppia maritima, in two of the estuaries. Males (5.71 ± 0.41 mm) were significantly larger than females (3.99 ± 0.26 mm), but the sex ratios were skewed in favour of females, (a common feature in many isopod populations). Females were found carrying brood throughout the study, releasing offspring directly into the water column, to allow recruitment to the populations. The larger the female, the larger the brood carried (up to a maximum of 72 embryo/mancas). Results of laboratory experiments indicate that the close association of Exosphaeroma hylocoetes with submerged macrophytes is a result of the plant stands providing a refuge against predation by selected ichthyofauna. However stable carbon isotope and fatty acid analyses indicate that E. hylocoetes made use of ephiphytic algae and detritus on the stems of R. maritima, rather than the submerged macrophyte itself. There were no significant differences in the growth rates of male and female isopods at combinations of temperature (15 and 25 °C) and salinity (15 and 35 ‰). Laboratory growth studies revealed that males lived longer than females (25.77 ± 3.40 weeks vs 21.52 ± 3.00 weeks), and therefore achieved larger overall size. Females, however, reached sexual maturity (at 2.5 mm) at a faster rate (two to four weeks) than males (5.5 mm after 6.5 to 11 weeks), dependent on temperature. Exosphaeroma hylocoetes with its association with submerged macrophytes, early maturity, its growth rates and longevity, female-biased sex ratios and year-round breeding, all contribute to its success in temporary open/closed estuaries.
- Full Text:
- Date Issued: 2009
- Authors: Henninger, Tony Oskar
- Date: 2009
- Subjects: Estuaries -- South Africa -- Eastern Cape Estuarine ecology -- South Africa -- Eastern Cape Isopoda -- South Africa -- Eastern Cape Estuarine biology -- South Africa -- Eastern Cape Ruppia maritima
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5640 , http://hdl.handle.net/10962/d1005322
- Description: Temporarily open/closed estuaries (TOCE’s) are the numerically dominant type of estuary accounting for ≈ 70 % of all estuaries along the South African coastline. Despite their numerical dominance, aspects of the biology of organisms within these systems, particularly macrocrustacea remain poorly understood. This study firstly assessed the abundance and biomass of the most common isopod, Exosphaeroma hylocoetes, in three Eastern Cape TOCE’s, (the West Kleinemonde, East Kleinemonde and Kasouga Estuaries), and their response to mouth breaching events. This study was followed by aspects of the biology of the isopod including their utilisation of submerged macrophytes as a refuge from predation and/or possible food source, as well as the growth rates of the isopods in the laboratory under different environmental conditions. Mean isopod abundances and biomasses ranged between 0 and 4 791 ind. m⁻² and 0 and 9.65 mg dwt. m⁻² in the West Kleinemonde Estuary and between 0 and 108 ind. m⁻² and 0 and 0.318 mg dwt. m⁻² in the nearby East Kleinemonde Estuary. In the Kasouga Estuary, the values ranged between 0 and 3 650 ind. m⁻² and 0 and 5.105 mg dwt. m⁻². Temporal and spatial changes in the abundance and biomass of E. hylocoetes within the three systems was primarily linked to mouth phase, with populations declining when the mouth was open and to a lesser extent, seasonality. In all three estuaries maximum isopod abundances and biomasses were recorded in their middle and upper reaches, which could be ascribed to the presence of submerged macrophytes particularly Ruppia maritima, in two of the estuaries. Males (5.71 ± 0.41 mm) were significantly larger than females (3.99 ± 0.26 mm), but the sex ratios were skewed in favour of females, (a common feature in many isopod populations). Females were found carrying brood throughout the study, releasing offspring directly into the water column, to allow recruitment to the populations. The larger the female, the larger the brood carried (up to a maximum of 72 embryo/mancas). Results of laboratory experiments indicate that the close association of Exosphaeroma hylocoetes with submerged macrophytes is a result of the plant stands providing a refuge against predation by selected ichthyofauna. However stable carbon isotope and fatty acid analyses indicate that E. hylocoetes made use of ephiphytic algae and detritus on the stems of R. maritima, rather than the submerged macrophyte itself. There were no significant differences in the growth rates of male and female isopods at combinations of temperature (15 and 25 °C) and salinity (15 and 35 ‰). Laboratory growth studies revealed that males lived longer than females (25.77 ± 3.40 weeks vs 21.52 ± 3.00 weeks), and therefore achieved larger overall size. Females, however, reached sexual maturity (at 2.5 mm) at a faster rate (two to four weeks) than males (5.5 mm after 6.5 to 11 weeks), dependent on temperature. Exosphaeroma hylocoetes with its association with submerged macrophytes, early maturity, its growth rates and longevity, female-biased sex ratios and year-round breeding, all contribute to its success in temporary open/closed estuaries.
- Full Text:
- Date Issued: 2009
Assessing entrepreneurship education at secondary schools in the NMBM
- Authors: Sathorar, Heloise Helena
- Date: 2009
- Subjects: Business education -- South Africa , Entrepreneurship -- Study and teaching (Secondary) -- South Africa , Curriculum planning -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8697 , http://hdl.handle.net/10948/1081 , Business education -- South Africa , Entrepreneurship -- Study and teaching (Secondary) -- South Africa , Curriculum planning -- South Africa
- Description: Entrepreneurship has emerged over the last two decades as arguably the most potent economic force the world has ever experienced (Kuratko, 2005: 577). Entrepreneurship has become a pressing national priority in South Africa as there are simply not enough existing jobs to absorb the influx of school leavers into the labour market (www.ssaci.org.za). The Global Entrepreneurship Monitor study has consistently highlighted the weaknesses in the education system as a factor limiting entrepreneurial activities in South Africa (Orford, 2004: 26). Entrepreneurship education was introduced into the Further Education and Training curriculum (Grades 10-12) in 2006 as part of an optional subject Business Studies (Horn, 2006: 120). Preliminary evidence suggests widespread problems across the country with the implementation of entrepreneurship education programs in schools (Isaacs, Visser, Friedrich and Brijlal, 2007: 618). The primary objective of this study is to improve entrepreneurship education at secondary school level by investigating how effective the current entrepreneurship education program is in providing school leavers with the entrepreneurial knowledge and skills required to start their own business. The study conducted a literature review to establish global trends of entrepreneurship education. Furthermore, a qualitative case study approach was used, where three schools from Nelson Mandela Bay Municipality was selected for collecting data on the progress of entrepreneurship education in secondary schools. The study found that prescribed content for entrepreneurship education is being taught at secondary schools. However, concerns were identified with the methods used to teach entrepreneurship education as it lacked practical exposure to real life situations. The study found that the way in which entrepreneurship education was taught did not motivate school leavers to start their own business. Therefore, the study recommends that entrepreneurship education should be offered as an independent subject and not as part of another subject. Furthermore, a practical approach should be followed in teaching entrepreneurship education. Finally, commitment and collaborative participation by all stakeholders are required to ensure the success of entrepreneurship education.
- Full Text:
- Date Issued: 2009
- Authors: Sathorar, Heloise Helena
- Date: 2009
- Subjects: Business education -- South Africa , Entrepreneurship -- Study and teaching (Secondary) -- South Africa , Curriculum planning -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8697 , http://hdl.handle.net/10948/1081 , Business education -- South Africa , Entrepreneurship -- Study and teaching (Secondary) -- South Africa , Curriculum planning -- South Africa
- Description: Entrepreneurship has emerged over the last two decades as arguably the most potent economic force the world has ever experienced (Kuratko, 2005: 577). Entrepreneurship has become a pressing national priority in South Africa as there are simply not enough existing jobs to absorb the influx of school leavers into the labour market (www.ssaci.org.za). The Global Entrepreneurship Monitor study has consistently highlighted the weaknesses in the education system as a factor limiting entrepreneurial activities in South Africa (Orford, 2004: 26). Entrepreneurship education was introduced into the Further Education and Training curriculum (Grades 10-12) in 2006 as part of an optional subject Business Studies (Horn, 2006: 120). Preliminary evidence suggests widespread problems across the country with the implementation of entrepreneurship education programs in schools (Isaacs, Visser, Friedrich and Brijlal, 2007: 618). The primary objective of this study is to improve entrepreneurship education at secondary school level by investigating how effective the current entrepreneurship education program is in providing school leavers with the entrepreneurial knowledge and skills required to start their own business. The study conducted a literature review to establish global trends of entrepreneurship education. Furthermore, a qualitative case study approach was used, where three schools from Nelson Mandela Bay Municipality was selected for collecting data on the progress of entrepreneurship education in secondary schools. The study found that prescribed content for entrepreneurship education is being taught at secondary schools. However, concerns were identified with the methods used to teach entrepreneurship education as it lacked practical exposure to real life situations. The study found that the way in which entrepreneurship education was taught did not motivate school leavers to start their own business. Therefore, the study recommends that entrepreneurship education should be offered as an independent subject and not as part of another subject. Furthermore, a practical approach should be followed in teaching entrepreneurship education. Finally, commitment and collaborative participation by all stakeholders are required to ensure the success of entrepreneurship education.
- Full Text:
- Date Issued: 2009
Assessing relationship management in Meeg bank in East London
- Ntsunguzi, Carol Ntombemhlophe
- Authors: Ntsunguzi, Carol Ntombemhlophe
- Date: 2009
- Subjects: Customer relations -- South Africa -- East London -- Management , Customer relations -- South Africa -- East London , Customer services -- South Africa -- East London , Bank and banking -- Customer Services
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8580 , http://hdl.handle.net/10948/1147 , Customer relations -- South Africa -- East London -- Management , Customer relations -- South Africa -- East London , Customer services -- South Africa -- East London , Bank and banking -- Customer Services
- Description: Quality of service becomes the main avenue that could be used to gain sustainable competitive advantage. This is due to the fact that the environment within which organisations operate continues to change with respect to customer expectations. The financial sector, in particular the banking industry is not left behind and players in this industry also strive to “up their game” in the competitive market-place. It has become increasingly important for organisations to find ways, not only to reach the top, but to maintain on-going long-term relationship with their customers. This can result in long-term benefits, both for the organisation (by improving marketing productivity) and for the customer (by delivering better quality products). This paper assesses the perception the Business clients/ customers within a business banking environment have about relationship management by Meeg bank in East London branch town of Eastern Cape. A literature survey was undertaken into the importance of Customer Relationship by bank. Questionnaires were sent to all employees of the business clients for their views on Customer Relationship Management (CRM). The result the show importance of the commitment of all employees’ especially senior management is essential for the success of CRM efforts in improving the quality of service offered by an organisation. The research also confirmed the importance of having wide range of options in form of products offered. This will not only benefit the bank in terms of higher profits, but will give the bank the competitive advantage in the market place.
- Full Text:
- Date Issued: 2009
- Authors: Ntsunguzi, Carol Ntombemhlophe
- Date: 2009
- Subjects: Customer relations -- South Africa -- East London -- Management , Customer relations -- South Africa -- East London , Customer services -- South Africa -- East London , Bank and banking -- Customer Services
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8580 , http://hdl.handle.net/10948/1147 , Customer relations -- South Africa -- East London -- Management , Customer relations -- South Africa -- East London , Customer services -- South Africa -- East London , Bank and banking -- Customer Services
- Description: Quality of service becomes the main avenue that could be used to gain sustainable competitive advantage. This is due to the fact that the environment within which organisations operate continues to change with respect to customer expectations. The financial sector, in particular the banking industry is not left behind and players in this industry also strive to “up their game” in the competitive market-place. It has become increasingly important for organisations to find ways, not only to reach the top, but to maintain on-going long-term relationship with their customers. This can result in long-term benefits, both for the organisation (by improving marketing productivity) and for the customer (by delivering better quality products). This paper assesses the perception the Business clients/ customers within a business banking environment have about relationship management by Meeg bank in East London branch town of Eastern Cape. A literature survey was undertaken into the importance of Customer Relationship by bank. Questionnaires were sent to all employees of the business clients for their views on Customer Relationship Management (CRM). The result the show importance of the commitment of all employees’ especially senior management is essential for the success of CRM efforts in improving the quality of service offered by an organisation. The research also confirmed the importance of having wide range of options in form of products offered. This will not only benefit the bank in terms of higher profits, but will give the bank the competitive advantage in the market place.
- Full Text:
- Date Issued: 2009
Assessing the impact of loal content policy on youth culture in Mbare Harae: the case of Youth.com
- Authors: Mabika, Memory
- Date: 2009
- Subjects: Television and youth -- Zimbabwe , Television programs -- Zimbabwe , Television -- Psychological aspects
- Language: English
- Type: Thesis , Masters , M Soc Sc (Com)
- Identifier: vital:11361 , http://hdl.handle.net/10353/d1001275 , Television and youth -- Zimbabwe , Television programs -- Zimbabwe , Television -- Psychological aspects
- Description: The study sought to establish the impact of using the local content policy in reducing television cultural influences on Mbare youth in Zimbabwe. It is assumed that television has ideological and hegemonic functions which have come to dominate the life styles of the youths on issues of dress styles, musical tastes and language, thus threatening and weakening the long established local cultures. Hence the Zimbabwean government’s local content policy was established to reduce influences of alien cultures. This study, therefore, sought to establish if Mbare youth cultures confirm or reject the imitation of television cultures with regard to dress styles, music tastes and language. In addition, the investigation aimed at establishing the feasibility of using the local content policy to reduce foreign cultural intrusions vis-à-vis globalisation challenges. The three theories utilised in the discussion of the influence of television on Mbare youth culture in this study include the cultivation theory, the theory of hegemony and the uses and gratification theory. A qualitative study was adopted to gather data using focus group discussions, questionnaires and semiotic analysis. The sample of the study consisted of 87 participants and 4 Youth.com programmes. The study revealed that television has ideological and hegemonic functions. As such, it tends to be a dominant influence on the life styles and culture of Mbare youths. The study also established that Youth.com influences youth culture through music. In Zimbabwe music has become the most influential aspect of Youth.com despite not being specified in the local content policy on television broadcasting. Furthermore, the study shows that the implications of globalisation on local television content are undermining government efforts to preserve local cultures through the local content policy. The primary reason for this has to do with the fact that Youth.com programme does not contain a higher quota of local content as stipulated in the policy. However, although the local content policy was viewed as a political gimmick, the the study revealed that it was necessary in view of youths’ vulnerability to television’s ideological and hegemonic influences. Nevertheless, in view of the loopholes revealed by this study, the policy requires to be revised to cater for all the essential cultural elements, such as, music, which are allowing alien cultures to penetrate local ways of life. For instance, the urban groove music has major impacts on the culture of Mbare youths.
- Full Text:
- Date Issued: 2009
- Authors: Mabika, Memory
- Date: 2009
- Subjects: Television and youth -- Zimbabwe , Television programs -- Zimbabwe , Television -- Psychological aspects
- Language: English
- Type: Thesis , Masters , M Soc Sc (Com)
- Identifier: vital:11361 , http://hdl.handle.net/10353/d1001275 , Television and youth -- Zimbabwe , Television programs -- Zimbabwe , Television -- Psychological aspects
- Description: The study sought to establish the impact of using the local content policy in reducing television cultural influences on Mbare youth in Zimbabwe. It is assumed that television has ideological and hegemonic functions which have come to dominate the life styles of the youths on issues of dress styles, musical tastes and language, thus threatening and weakening the long established local cultures. Hence the Zimbabwean government’s local content policy was established to reduce influences of alien cultures. This study, therefore, sought to establish if Mbare youth cultures confirm or reject the imitation of television cultures with regard to dress styles, music tastes and language. In addition, the investigation aimed at establishing the feasibility of using the local content policy to reduce foreign cultural intrusions vis-à-vis globalisation challenges. The three theories utilised in the discussion of the influence of television on Mbare youth culture in this study include the cultivation theory, the theory of hegemony and the uses and gratification theory. A qualitative study was adopted to gather data using focus group discussions, questionnaires and semiotic analysis. The sample of the study consisted of 87 participants and 4 Youth.com programmes. The study revealed that television has ideological and hegemonic functions. As such, it tends to be a dominant influence on the life styles and culture of Mbare youths. The study also established that Youth.com influences youth culture through music. In Zimbabwe music has become the most influential aspect of Youth.com despite not being specified in the local content policy on television broadcasting. Furthermore, the study shows that the implications of globalisation on local television content are undermining government efforts to preserve local cultures through the local content policy. The primary reason for this has to do with the fact that Youth.com programme does not contain a higher quota of local content as stipulated in the policy. However, although the local content policy was viewed as a political gimmick, the the study revealed that it was necessary in view of youths’ vulnerability to television’s ideological and hegemonic influences. Nevertheless, in view of the loopholes revealed by this study, the policy requires to be revised to cater for all the essential cultural elements, such as, music, which are allowing alien cultures to penetrate local ways of life. For instance, the urban groove music has major impacts on the culture of Mbare youths.
- Full Text:
- Date Issued: 2009
Assessing the impact of qualified mathematics and science teachers in the Buffalo city area
- Authors: Kopolo, Lungiswa
- Date: 2009
- Subjects: Employee retention -- South Africa -- Buffalo City Municipality , Employees -- Recruiting -- South Africa -- Buffalo City Municipality , Mathematics teachers -- South Africa -- Buffalo City Municipality , Science teachers -- South Africa -- Buffalo City Municipality , Education -- Personnel management , School -- Personnel management -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8573 , http://hdl.handle.net/10948/1173 , Employee retention -- South Africa -- Buffalo City Municipality , Employees -- Recruiting -- South Africa -- Buffalo City Municipality , Mathematics teachers -- South Africa -- Buffalo City Municipality , Science teachers -- South Africa -- Buffalo City Municipality , Education -- Personnel management , School -- Personnel management -- South Africa
- Description: Mathematics and science form an integral part people’s daily lives. South African people suddenly find themselves on a technological highway, where mathematical, scientific and creative thinking as well as problem solving skills take centre stage. However many people fear these, and believe that they are unable to tackle them. Mathematics and science educators therefore have need to have knowledge and understanding regarding 6 the foundation of the teaching of these subjects in the intermediate and senior phases at schools. This should enable them to contribute positively towards changing people’s perceptions about these subjects. Based on the above information I felt it imperative for me to investigate the impact of shortages of maths and science educators with special reference to the Buffalo City Area. Purpose of the study: 1 To determine whether schools are able to attract and retain qualified maths and science educators, 2 To identify the quantity of quality maths and science learners schools are able to produce for tertiary education, 3 To investigate the rate of turnover of maths and science educators, 4 To identify the number of maths and science learners who are willing to study maths and science at tertiary level and thereafter join the teaching fraternity.
- Full Text:
- Date Issued: 2009
- Authors: Kopolo, Lungiswa
- Date: 2009
- Subjects: Employee retention -- South Africa -- Buffalo City Municipality , Employees -- Recruiting -- South Africa -- Buffalo City Municipality , Mathematics teachers -- South Africa -- Buffalo City Municipality , Science teachers -- South Africa -- Buffalo City Municipality , Education -- Personnel management , School -- Personnel management -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8573 , http://hdl.handle.net/10948/1173 , Employee retention -- South Africa -- Buffalo City Municipality , Employees -- Recruiting -- South Africa -- Buffalo City Municipality , Mathematics teachers -- South Africa -- Buffalo City Municipality , Science teachers -- South Africa -- Buffalo City Municipality , Education -- Personnel management , School -- Personnel management -- South Africa
- Description: Mathematics and science form an integral part people’s daily lives. South African people suddenly find themselves on a technological highway, where mathematical, scientific and creative thinking as well as problem solving skills take centre stage. However many people fear these, and believe that they are unable to tackle them. Mathematics and science educators therefore have need to have knowledge and understanding regarding 6 the foundation of the teaching of these subjects in the intermediate and senior phases at schools. This should enable them to contribute positively towards changing people’s perceptions about these subjects. Based on the above information I felt it imperative for me to investigate the impact of shortages of maths and science educators with special reference to the Buffalo City Area. Purpose of the study: 1 To determine whether schools are able to attract and retain qualified maths and science educators, 2 To identify the quantity of quality maths and science learners schools are able to produce for tertiary education, 3 To investigate the rate of turnover of maths and science educators, 4 To identify the number of maths and science learners who are willing to study maths and science at tertiary level and thereafter join the teaching fraternity.
- Full Text:
- Date Issued: 2009
Assessment and monitoring of land degradation using remote sensing and geographic information systems (GIS): a case study of Qoqodala within the Wit-Kei catchment in the Eastern Cape, South Africa
- Ngcofe, Luncedo Dalithemba Sanelisiwe
- Authors: Ngcofe, Luncedo Dalithemba Sanelisiwe
- Date: 2009
- Subjects: Geographic information systems -- South Africa -- Eastern Cape , Remote sensing -- South Africa -- Eastern Cape , Land degradation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4818 , http://hdl.handle.net/10962/d1005492 , Geographic information systems -- South Africa -- Eastern Cape , Remote sensing -- South Africa -- Eastern Cape , Land degradation -- South Africa -- Eastern Cape
- Description: Land degradation is a global problem affecting many countries including South Africa. This study was conducted in order to assess and monitor the nature and extent of land degradation within Qoqodala in the Eastern Cape Province, of South Africa. The study used GIS and Remote Sensing techniques together with household interviews in determining extent, spatial characteristics and nature of land degradation within the study area. Vegetation cover and bare-ground change were the land degradation indicators assessed and monitored by this study. Through RGB band combination, Tasselled Cap Analysis and Unsupervised ISODATA classification techniques, Landsat images over the past eighteen years (1984, 1993, 1996, 2000 and 2002) have been analysed. The results showed that there is vegetation cover and bare-ground increase in the study area. The vegetation increase has been seen as a sign of land degradation increase due to the encroachment of indigenous vegetation by Euryops species (also known as Lapesi by the local community). The bare-ground land degradation indicator has also increased. The analyses of slope showed the spatial characteristics of bare-ground occurring on moderate to flat slopes while vegetation cover occurs on steep to very steep slopes. Furthermore the photographs captured during field visits show rills and gullies or dongas occurring on bare-ground. The interviewed respondents indicated that decline in food production, increase in dongas and vast increase in Euryops and a decline in grassland are the indicators of degradation that are observed in the study area. The occurrence of erosion features (rills and dongas) on bare-ground and the increase of vegetation shown by GIS and Remote Sensing techniques showed a positive correlation with field and household survey towards establishing the nature of land degradation. In this study Landsat images together with interviews proved to be a very useful tool for land degradation research. However the suggestion of a higher spatial resolution satellite image on small catchment studies is recommended
- Full Text:
- Date Issued: 2009
- Authors: Ngcofe, Luncedo Dalithemba Sanelisiwe
- Date: 2009
- Subjects: Geographic information systems -- South Africa -- Eastern Cape , Remote sensing -- South Africa -- Eastern Cape , Land degradation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4818 , http://hdl.handle.net/10962/d1005492 , Geographic information systems -- South Africa -- Eastern Cape , Remote sensing -- South Africa -- Eastern Cape , Land degradation -- South Africa -- Eastern Cape
- Description: Land degradation is a global problem affecting many countries including South Africa. This study was conducted in order to assess and monitor the nature and extent of land degradation within Qoqodala in the Eastern Cape Province, of South Africa. The study used GIS and Remote Sensing techniques together with household interviews in determining extent, spatial characteristics and nature of land degradation within the study area. Vegetation cover and bare-ground change were the land degradation indicators assessed and monitored by this study. Through RGB band combination, Tasselled Cap Analysis and Unsupervised ISODATA classification techniques, Landsat images over the past eighteen years (1984, 1993, 1996, 2000 and 2002) have been analysed. The results showed that there is vegetation cover and bare-ground increase in the study area. The vegetation increase has been seen as a sign of land degradation increase due to the encroachment of indigenous vegetation by Euryops species (also known as Lapesi by the local community). The bare-ground land degradation indicator has also increased. The analyses of slope showed the spatial characteristics of bare-ground occurring on moderate to flat slopes while vegetation cover occurs on steep to very steep slopes. Furthermore the photographs captured during field visits show rills and gullies or dongas occurring on bare-ground. The interviewed respondents indicated that decline in food production, increase in dongas and vast increase in Euryops and a decline in grassland are the indicators of degradation that are observed in the study area. The occurrence of erosion features (rills and dongas) on bare-ground and the increase of vegetation shown by GIS and Remote Sensing techniques showed a positive correlation with field and household survey towards establishing the nature of land degradation. In this study Landsat images together with interviews proved to be a very useful tool for land degradation research. However the suggestion of a higher spatial resolution satellite image on small catchment studies is recommended
- Full Text:
- Date Issued: 2009
Assessment of the quality of primary health care services rendered at Moses Mabida Clinic
- Authors: Tsetswa, Mncedisi Patrick
- Date: 2009
- Subjects: Primary health care -- South Africa , Health facilities
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8727 , http://hdl.handle.net/10948/880 , Primary health care -- South Africa , Health facilities
- Description: Health is a basic human right enshrined in the South African Constitution. It is the responsibility of government to ensure that the nation is healthy because good health is a prerequisite for social and economic development as well as an outcome of that process. Special attention on the healthcare needs of rural communities should be given because these communities were the worst affected by the legacy of the apartheid regime. Moses Mabida community is no exception. Since the advent of democracy, work has been done to ensure that adequate primary health care services are delivered to previously disadvantaged communities such as Moses Mabida. To monitor progress on health care service delivery, evaluation of these services is needed. The evaluation of these services will help identify the strengths and weaknesses so as to come up with quality improvement strategies, hence this study. This study takes form of an assessment survey involving a literature review and a survey of members of the Moses Mabida community who depend on the clinic for their health care needs. The literature identified best practice models of primary health care and these were used as an analytic tool to determine to what extent the primary health care services at Moses Mabida comply with national and international standards. It has been shown that the primary health care services at Moses Mabida Clinic largely comply with national and international standards although several recommendations have been presented for consideration.
- Full Text:
- Date Issued: 2009
- Authors: Tsetswa, Mncedisi Patrick
- Date: 2009
- Subjects: Primary health care -- South Africa , Health facilities
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8727 , http://hdl.handle.net/10948/880 , Primary health care -- South Africa , Health facilities
- Description: Health is a basic human right enshrined in the South African Constitution. It is the responsibility of government to ensure that the nation is healthy because good health is a prerequisite for social and economic development as well as an outcome of that process. Special attention on the healthcare needs of rural communities should be given because these communities were the worst affected by the legacy of the apartheid regime. Moses Mabida community is no exception. Since the advent of democracy, work has been done to ensure that adequate primary health care services are delivered to previously disadvantaged communities such as Moses Mabida. To monitor progress on health care service delivery, evaluation of these services is needed. The evaluation of these services will help identify the strengths and weaknesses so as to come up with quality improvement strategies, hence this study. This study takes form of an assessment survey involving a literature review and a survey of members of the Moses Mabida community who depend on the clinic for their health care needs. The literature identified best practice models of primary health care and these were used as an analytic tool to determine to what extent the primary health care services at Moses Mabida comply with national and international standards. It has been shown that the primary health care services at Moses Mabida Clinic largely comply with national and international standards although several recommendations have been presented for consideration.
- Full Text:
- Date Issued: 2009
Attitudes and perceptions towards TB in Grahamstown East in a time of HIV/AIDS
- Authors: Ndoro, Tinashe T. R
- Date: 2009
- Subjects: Tuberculosis -- South Africa -- Grahamstown , AIDS (Disease) -- Social aspects -- South Africa -- Grahamstown , HIV (Viruses) -- Social aspects -- South Africa -- Grahamstown , Tuberculosis -- Social aspects -- South Africa -- Grahamstown , Tuberculosis -- Prevention -- South Africa -- Grahamstown , AIDS (Disease) -- South Africa -- Grahamstown -- Public opinion , Tuberculosis -- South Africa -- Grahamstown -- Public opinion , Health surveys -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:3030 , http://hdl.handle.net/10962/d1002539 , Tuberculosis -- South Africa -- Grahamstown , AIDS (Disease) -- Social aspects -- South Africa -- Grahamstown , HIV (Viruses) -- Social aspects -- South Africa -- Grahamstown , Tuberculosis -- Social aspects -- South Africa -- Grahamstown , Tuberculosis -- Prevention -- South Africa -- Grahamstown , AIDS (Disease) -- South Africa -- Grahamstown -- Public opinion , Tuberculosis -- South Africa -- Grahamstown -- Public opinion , Health surveys -- South Africa -- Grahamstown
- Description: Tuberculosis (TB) has become a serious South African health problem because it is the most common opportunistic disease that leads to death in people with HIV/AIDS. Due to the airborne nature of the disease it can easily be spread to anyone including healthy people. A lack of compliance to treatment by TB patients explains why prevalence rates of the disease are high and why there is an emergence of drug resistant strains such as XDR-TB and MDR-TB. Information on existing knowledge, attitudes and perceptions regarding TB can provide a crucial foundation for the development of educational programmes and interventions aimed at reducing the further spread of the disease. This study aimed at understanding the knowledge, attitudes and perceptions towards TB and relating these to the current prevalence of HIV/AIDS. A face-to-face interview survey was conducted among adult Grahamstown East residents (n=1020). The Health Belief Model (Rosenstock et al., 1994) and Bandura’s (1986) Social Cognitive Theory formed the theoretical framework of the data collection and analysis. The data generated from the field work was first descriptively analysed providing frequency tables. Thereafter cross tabulations were calculated for relevant items using independent variables, namely gender, level of education, and experience of dealing with TB. The results of the study show that, in general, knowledge concerning TB was sufficient to provide a foundation for the adoption of healthier behaviours in the female respondents. Few of the respondents reported feeling personally susceptible although the majority of the respondents acknowledged the severity of the disease. The cues to action lacked the influence to persuade people to adopt positive health related behaviours. The perceived benefits of adopting preventative behaviour were not very influential in the adoption of healthier behavioural changes in the respondents. Disease stigma regarding the dual association of TB and HIV/AIDS was the main barrier for the adoption of healthier behavioural attitudes. Perceived self-efficacy in preventative behaviours was generally low in the less educated respondents. Recommendations regarding areas for future research and change interventions are provided.
- Full Text:
- Date Issued: 2009
- Authors: Ndoro, Tinashe T. R
- Date: 2009
- Subjects: Tuberculosis -- South Africa -- Grahamstown , AIDS (Disease) -- Social aspects -- South Africa -- Grahamstown , HIV (Viruses) -- Social aspects -- South Africa -- Grahamstown , Tuberculosis -- Social aspects -- South Africa -- Grahamstown , Tuberculosis -- Prevention -- South Africa -- Grahamstown , AIDS (Disease) -- South Africa -- Grahamstown -- Public opinion , Tuberculosis -- South Africa -- Grahamstown -- Public opinion , Health surveys -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:3030 , http://hdl.handle.net/10962/d1002539 , Tuberculosis -- South Africa -- Grahamstown , AIDS (Disease) -- Social aspects -- South Africa -- Grahamstown , HIV (Viruses) -- Social aspects -- South Africa -- Grahamstown , Tuberculosis -- Social aspects -- South Africa -- Grahamstown , Tuberculosis -- Prevention -- South Africa -- Grahamstown , AIDS (Disease) -- South Africa -- Grahamstown -- Public opinion , Tuberculosis -- South Africa -- Grahamstown -- Public opinion , Health surveys -- South Africa -- Grahamstown
- Description: Tuberculosis (TB) has become a serious South African health problem because it is the most common opportunistic disease that leads to death in people with HIV/AIDS. Due to the airborne nature of the disease it can easily be spread to anyone including healthy people. A lack of compliance to treatment by TB patients explains why prevalence rates of the disease are high and why there is an emergence of drug resistant strains such as XDR-TB and MDR-TB. Information on existing knowledge, attitudes and perceptions regarding TB can provide a crucial foundation for the development of educational programmes and interventions aimed at reducing the further spread of the disease. This study aimed at understanding the knowledge, attitudes and perceptions towards TB and relating these to the current prevalence of HIV/AIDS. A face-to-face interview survey was conducted among adult Grahamstown East residents (n=1020). The Health Belief Model (Rosenstock et al., 1994) and Bandura’s (1986) Social Cognitive Theory formed the theoretical framework of the data collection and analysis. The data generated from the field work was first descriptively analysed providing frequency tables. Thereafter cross tabulations were calculated for relevant items using independent variables, namely gender, level of education, and experience of dealing with TB. The results of the study show that, in general, knowledge concerning TB was sufficient to provide a foundation for the adoption of healthier behaviours in the female respondents. Few of the respondents reported feeling personally susceptible although the majority of the respondents acknowledged the severity of the disease. The cues to action lacked the influence to persuade people to adopt positive health related behaviours. The perceived benefits of adopting preventative behaviour were not very influential in the adoption of healthier behavioural changes in the respondents. Disease stigma regarding the dual association of TB and HIV/AIDS was the main barrier for the adoption of healthier behavioural attitudes. Perceived self-efficacy in preventative behaviours was generally low in the less educated respondents. Recommendations regarding areas for future research and change interventions are provided.
- Full Text:
- Date Issued: 2009
Automating the conversion of natural language fiction to multi-modal 3D animated virtual environments
- Authors: Glass, Kevin Robert
- Date: 2009
- Subjects: Virtual computer systems , Virtual storage (Computer science) , Virtual reality , Computer animation , Fiction -- Computer programs , Narration (Rhetoric) -- Computer simulation , Animation (Cinematography) , Natural language processing (Computer Science)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4632 , http://hdl.handle.net/10962/d1006518
- Description: Popular fiction books describe rich visual environments that contain characters, objects, and behaviour. This research develops automated processes for converting text sourced from fiction books into animated virtual environments and multi-modal films. This involves the analysis of unrestricted natural language fiction to identify appropriate visual descriptions, and the interpretation of the identified descriptions for constructing animated 3D virtual environments. The goal of the text analysis stage is the creation of annotated fiction text, which identifies visual descriptions in a structured manner. A hierarchical rule-based learning system is created that induces patterns from example annotations provided by a human, and uses these for the creation of additional annotations. Patterns are expressed as tree structures that abstract the input text on different levels according to structural (token, sentence) and syntactic (parts-of-speech, syntactic function) categories. Patterns are generalized using pair-wise merging, where dissimilar sub-trees are replaced with wild-cards. The result is a small set of generalized patterns that are able to create correct annotations. A set of generalized patterns represents a model of an annotator's mental process regarding a particular annotation category. Annotated text is interpreted automatically for constructing detailed scene descriptions. This includes identifying which scenes to visualize, and identifying the contents and behaviour in each scene. Entity behaviour in a 3D virtual environment is formulated using time-based constraints that are automatically derived from annotations. Constraints are expressed as non-linear symbolic functions that restrict the trajectories of a pair of entities over a continuous interval of time. Solutions to these constraints specify precise behaviour. We create an innovative quantified constraint optimizer for locating sound solutions, which uses interval arithmetic for treating time and space as contiguous quantities. This optimization method uses a technique of constraint relaxation and tightening that allows solution approximations to be located where constraint systems are inconsistent (an ability not previously explored in interval-based quantified constraint solving). 3D virtual environments are populated by automatically selecting geometric models or procedural geometry-creation methods from a library. 3D models are animated according to trajectories derived from constraint solutions. The final animated film is sequenced using a range of modalities including animated 3D graphics, textual subtitles, audio narrations, and foleys. Hierarchical rule-based learning is evaluated over a range of annotation categories. Models are induced for different categories of annotation without modifying the core learning algorithms, and these models are shown to be applicable to different types of books. Models are induced automatically with accuracies ranging between 51.4% and 90.4%, depending on the category. We show that models are refined if further examples are provided, and this supports a boot-strapping process for training the learning mechanism. The task of interpreting annotated fiction text and populating 3D virtual environments is successfully automated using our described techniques. Detailed scene descriptions are created accurately, where between 83% and 96% of the automatically generated descriptions require no manual modification (depending on the type of description). The interval-based quantified constraint optimizer fully automates the behaviour specification process. Sample animated multi-modal 3D films are created using extracts from fiction books that are unrestricted in terms of complexity or subject matter (unlike existing text-to-graphics systems). These examples demonstrate that: behaviour is visualized that corresponds to the descriptions in the original text; appropriate geometry is selected (or created) for visualizing entities in each scene; sequences of scenes are created for a film-like presentation of the story; and that multiple modalities are combined to create a coherent multi-modal representation of the fiction text. This research demonstrates that visual descriptions in fiction text can be automatically identified, and that these descriptions can be converted into corresponding animated virtual environments. Unlike existing text-to-graphics systems, we describe techniques that function over unrestricted natural language text and perform the conversion process without the need for manually constructed repositories of world knowledge. This enables the rapid production of animated 3D virtual environments, allowing the human designer to focus on creative aspects.
- Full Text:
- Date Issued: 2009
- Authors: Glass, Kevin Robert
- Date: 2009
- Subjects: Virtual computer systems , Virtual storage (Computer science) , Virtual reality , Computer animation , Fiction -- Computer programs , Narration (Rhetoric) -- Computer simulation , Animation (Cinematography) , Natural language processing (Computer Science)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4632 , http://hdl.handle.net/10962/d1006518
- Description: Popular fiction books describe rich visual environments that contain characters, objects, and behaviour. This research develops automated processes for converting text sourced from fiction books into animated virtual environments and multi-modal films. This involves the analysis of unrestricted natural language fiction to identify appropriate visual descriptions, and the interpretation of the identified descriptions for constructing animated 3D virtual environments. The goal of the text analysis stage is the creation of annotated fiction text, which identifies visual descriptions in a structured manner. A hierarchical rule-based learning system is created that induces patterns from example annotations provided by a human, and uses these for the creation of additional annotations. Patterns are expressed as tree structures that abstract the input text on different levels according to structural (token, sentence) and syntactic (parts-of-speech, syntactic function) categories. Patterns are generalized using pair-wise merging, where dissimilar sub-trees are replaced with wild-cards. The result is a small set of generalized patterns that are able to create correct annotations. A set of generalized patterns represents a model of an annotator's mental process regarding a particular annotation category. Annotated text is interpreted automatically for constructing detailed scene descriptions. This includes identifying which scenes to visualize, and identifying the contents and behaviour in each scene. Entity behaviour in a 3D virtual environment is formulated using time-based constraints that are automatically derived from annotations. Constraints are expressed as non-linear symbolic functions that restrict the trajectories of a pair of entities over a continuous interval of time. Solutions to these constraints specify precise behaviour. We create an innovative quantified constraint optimizer for locating sound solutions, which uses interval arithmetic for treating time and space as contiguous quantities. This optimization method uses a technique of constraint relaxation and tightening that allows solution approximations to be located where constraint systems are inconsistent (an ability not previously explored in interval-based quantified constraint solving). 3D virtual environments are populated by automatically selecting geometric models or procedural geometry-creation methods from a library. 3D models are animated according to trajectories derived from constraint solutions. The final animated film is sequenced using a range of modalities including animated 3D graphics, textual subtitles, audio narrations, and foleys. Hierarchical rule-based learning is evaluated over a range of annotation categories. Models are induced for different categories of annotation without modifying the core learning algorithms, and these models are shown to be applicable to different types of books. Models are induced automatically with accuracies ranging between 51.4% and 90.4%, depending on the category. We show that models are refined if further examples are provided, and this supports a boot-strapping process for training the learning mechanism. The task of interpreting annotated fiction text and populating 3D virtual environments is successfully automated using our described techniques. Detailed scene descriptions are created accurately, where between 83% and 96% of the automatically generated descriptions require no manual modification (depending on the type of description). The interval-based quantified constraint optimizer fully automates the behaviour specification process. Sample animated multi-modal 3D films are created using extracts from fiction books that are unrestricted in terms of complexity or subject matter (unlike existing text-to-graphics systems). These examples demonstrate that: behaviour is visualized that corresponds to the descriptions in the original text; appropriate geometry is selected (or created) for visualizing entities in each scene; sequences of scenes are created for a film-like presentation of the story; and that multiple modalities are combined to create a coherent multi-modal representation of the fiction text. This research demonstrates that visual descriptions in fiction text can be automatically identified, and that these descriptions can be converted into corresponding animated virtual environments. Unlike existing text-to-graphics systems, we describe techniques that function over unrestricted natural language text and perform the conversion process without the need for manually constructed repositories of world knowledge. This enables the rapid production of animated 3D virtual environments, allowing the human designer to focus on creative aspects.
- Full Text:
- Date Issued: 2009
Awareness, attitudes and referral practices of health care providers to psychological services in Botswana
- Authors: July, Emma
- Date: 2009
- Subjects: Medical care -- Botswana -- Psychological aspects , Public health -- Botswana -- Psychological aspects , Attitude (Psychology) -- Botswana , Medical personnel -- Botswana , Medical personnel -- Attitudes , Primary health care -- Botswana , Awareness
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9889 , http://hdl.handle.net/10948/1166 , Medical care -- Botswana -- Psychological aspects , Public health -- Botswana -- Psychological aspects , Attitude (Psychology) -- Botswana , Medical personnel -- Botswana , Medical personnel -- Attitudes , Primary health care -- Botswana , Awareness
- Description: The provision of psychological services is vital considering the complex nature of psychosocial issues facing people today. Nevertheless, the provision and utilization of psychological services has not been given due recognition in most African countries, including Botswana. Botswana is one of the countries faced by the challenges of the HIV/AIDS pandemic and other mental health problems, as well as poverty and unemployment. To date statistics on the magnitude of the HIV/AIDS epidemic in Botswana, published annually by the National AIDS Coordinating Agency (NACA) reflect an increased rate of mental illness and psychosocial problems. Considering the complex nature of issues that impact negatively on people in Botswana, there is a need for awareness and the provision of psychological services in the primary health care system. There is little research on the place of psychology and psychological services in Botswana. The availability of such information is crucial for the planning of effective community-based psychological services. The present study employed a quantitative research method to explore and describe awareness and attitudes towards psychological services and referral practices in relation to psychological problems, of health care providers in Botswana. The participants in the study were chosen, based on a non-probability, purposive sampling method. The sample consisted of ninety-six persons and constituted medical doctors, nurses, psychiatrists, psychiatric nurses and clinical social workers from governmental and non-governmental institutions from Gaborone and Francistown in Botswana. Data were analyzed by means of descriptive statistics in order to identify the mean, ranges and standard deviations. Frequency counts and percentages of the participants’ responses were computed. The results of the study revealed an awareness of available psychological services, positive attitudes towards psychology and psychological services and a reasonable percentage of referrals to psychological services. The results also revealed that available psychological services were limited and not easily accessible to patients. There was also an indication of a shortage of trained professionals to offer psychological services in health care centres, which resulted in psychological problems being referred to social workers.
- Full Text:
- Date Issued: 2009
- Authors: July, Emma
- Date: 2009
- Subjects: Medical care -- Botswana -- Psychological aspects , Public health -- Botswana -- Psychological aspects , Attitude (Psychology) -- Botswana , Medical personnel -- Botswana , Medical personnel -- Attitudes , Primary health care -- Botswana , Awareness
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9889 , http://hdl.handle.net/10948/1166 , Medical care -- Botswana -- Psychological aspects , Public health -- Botswana -- Psychological aspects , Attitude (Psychology) -- Botswana , Medical personnel -- Botswana , Medical personnel -- Attitudes , Primary health care -- Botswana , Awareness
- Description: The provision of psychological services is vital considering the complex nature of psychosocial issues facing people today. Nevertheless, the provision and utilization of psychological services has not been given due recognition in most African countries, including Botswana. Botswana is one of the countries faced by the challenges of the HIV/AIDS pandemic and other mental health problems, as well as poverty and unemployment. To date statistics on the magnitude of the HIV/AIDS epidemic in Botswana, published annually by the National AIDS Coordinating Agency (NACA) reflect an increased rate of mental illness and psychosocial problems. Considering the complex nature of issues that impact negatively on people in Botswana, there is a need for awareness and the provision of psychological services in the primary health care system. There is little research on the place of psychology and psychological services in Botswana. The availability of such information is crucial for the planning of effective community-based psychological services. The present study employed a quantitative research method to explore and describe awareness and attitudes towards psychological services and referral practices in relation to psychological problems, of health care providers in Botswana. The participants in the study were chosen, based on a non-probability, purposive sampling method. The sample consisted of ninety-six persons and constituted medical doctors, nurses, psychiatrists, psychiatric nurses and clinical social workers from governmental and non-governmental institutions from Gaborone and Francistown in Botswana. Data were analyzed by means of descriptive statistics in order to identify the mean, ranges and standard deviations. Frequency counts and percentages of the participants’ responses were computed. The results of the study revealed an awareness of available psychological services, positive attitudes towards psychology and psychological services and a reasonable percentage of referrals to psychological services. The results also revealed that available psychological services were limited and not easily accessible to patients. There was also an indication of a shortage of trained professionals to offer psychological services in health care centres, which resulted in psychological problems being referred to social workers.
- Full Text:
- Date Issued: 2009
Awkward working postures and precision performance as an example of the relationship between ergonomics and production quality
- Ngcamu, Nokubonga Slindele (Sma)
- Authors: Ngcamu, Nokubonga Slindele (Sma)
- Date: 2009
- Subjects: Human engineering , Posture , Posture disorders , Musculoskeletal system -- Diseases , Work -- Physiological aspects
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5105 , http://hdl.handle.net/10962/d1005183 , Human engineering , Posture , Posture disorders , Musculoskeletal system -- Diseases , Work -- Physiological aspects
- Description: Ergonomics aims to improve worker health and enhance productivity and quality. Knowledge and practical evidence of this relationship would be instrumental for optimising organisational performance particularly in industrially developing countries where the discipline is still in its developmental stages. Therefore this thesis set out to analyse the relationship between ergonomics deficiencies and performance. A survey was first conducted to establish the severity of quality problems in the South African manufacturing industry and to determine if these were related to Ergonomic deficiencies. The results indicated that quality problems continue to plague industry, a challenge associated with huge cost implications. Furthermore organisations were not cognisant of the fact that ergonomics deficiencies such as poor workstation design and awkward or constrained working postures are a major contributing factor to poor quality and performance decrements. This demonstrates that much is yet to be done in raising awareness about the benefits of ergonomics in South Africa and other industrially developing countries. However, for this to be effective, tangible evidence of these purported benefits is required. In lieu of this, a laboratory study was then conducted to establish the relationship between awkward working postures and the performance of precision tasks. Acknowledging that the task and the worker are interrelated elements, the impact of precision task demands on the postural strain experienced by the human was also investigated. A high and low precision task quantified positional precision while a force task (combination of pushing and pulling) was utilised to assess the ability to maintain a precise force over time. These three tasks were performed in eight different postures; namely seated, standing, stooping 300 and 600, working overhead, lying supine, and twisting to either side. A combination of the tasks and postures resulted in 24 experimental conditions that were tested on forty eight healthy male and female participants. The performance related dependent variables were movement time, deviation from the centre of the target, and the trend/slope followed by the force exerted. Muscle activity of eight arm, shoulder and back muscles, iii supplemented with heart rate and local ratings of perceived exertion, were utilised to quantify the impact of the tasks and the postures on the individual. The results revealed that awkward working postures do in fact influence performance outcomes. In this regard, awkward working postures (such as overhead work and lying supine and stooping) were evidenced to significantly affect movement time, deviations from the target and the ability to maintain a constant force over time. These variables have a direct relationship with organisational priorities such as productivity and quality. Furthermore, the results indicated that high precision demands augment postural strain elicited through high muscle activity responses and may have negative implications for the precipitation of musculoskeletal disorders. Essentially, the work done on this thesis reflected the complex nature of ergonomics by drawing on both macro and micro-ergonomics approaches. In so doing, challenges perceived to be relevant to industry as reported by organisations formed the foundation for further laboratory studies. Therefore, more collaborative research and knowledge transfer between industry and ergonomics researchers is a necessity particularly in industrially developing countries where ergonomics is still in its developmental stages.
- Full Text:
- Date Issued: 2009
- Authors: Ngcamu, Nokubonga Slindele (Sma)
- Date: 2009
- Subjects: Human engineering , Posture , Posture disorders , Musculoskeletal system -- Diseases , Work -- Physiological aspects
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5105 , http://hdl.handle.net/10962/d1005183 , Human engineering , Posture , Posture disorders , Musculoskeletal system -- Diseases , Work -- Physiological aspects
- Description: Ergonomics aims to improve worker health and enhance productivity and quality. Knowledge and practical evidence of this relationship would be instrumental for optimising organisational performance particularly in industrially developing countries where the discipline is still in its developmental stages. Therefore this thesis set out to analyse the relationship between ergonomics deficiencies and performance. A survey was first conducted to establish the severity of quality problems in the South African manufacturing industry and to determine if these were related to Ergonomic deficiencies. The results indicated that quality problems continue to plague industry, a challenge associated with huge cost implications. Furthermore organisations were not cognisant of the fact that ergonomics deficiencies such as poor workstation design and awkward or constrained working postures are a major contributing factor to poor quality and performance decrements. This demonstrates that much is yet to be done in raising awareness about the benefits of ergonomics in South Africa and other industrially developing countries. However, for this to be effective, tangible evidence of these purported benefits is required. In lieu of this, a laboratory study was then conducted to establish the relationship between awkward working postures and the performance of precision tasks. Acknowledging that the task and the worker are interrelated elements, the impact of precision task demands on the postural strain experienced by the human was also investigated. A high and low precision task quantified positional precision while a force task (combination of pushing and pulling) was utilised to assess the ability to maintain a precise force over time. These three tasks were performed in eight different postures; namely seated, standing, stooping 300 and 600, working overhead, lying supine, and twisting to either side. A combination of the tasks and postures resulted in 24 experimental conditions that were tested on forty eight healthy male and female participants. The performance related dependent variables were movement time, deviation from the centre of the target, and the trend/slope followed by the force exerted. Muscle activity of eight arm, shoulder and back muscles, iii supplemented with heart rate and local ratings of perceived exertion, were utilised to quantify the impact of the tasks and the postures on the individual. The results revealed that awkward working postures do in fact influence performance outcomes. In this regard, awkward working postures (such as overhead work and lying supine and stooping) were evidenced to significantly affect movement time, deviations from the target and the ability to maintain a constant force over time. These variables have a direct relationship with organisational priorities such as productivity and quality. Furthermore, the results indicated that high precision demands augment postural strain elicited through high muscle activity responses and may have negative implications for the precipitation of musculoskeletal disorders. Essentially, the work done on this thesis reflected the complex nature of ergonomics by drawing on both macro and micro-ergonomics approaches. In so doing, challenges perceived to be relevant to industry as reported by organisations formed the foundation for further laboratory studies. Therefore, more collaborative research and knowledge transfer between industry and ergonomics researchers is a necessity particularly in industrially developing countries where ergonomics is still in its developmental stages.
- Full Text:
- Date Issued: 2009
Bank credit extension to the private sector and inflation in South Africa
- Authors: Dlamini, Samuel Nkosinathi
- Date: 2009
- Subjects: Bank loans -- South Africa , Inflation (Finance) -- South Africa , Money supply -- South Africa , Interest rates -- South Africa , Banks and banking -- South Africa , Foreign exchange rates -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:959 , http://hdl.handle.net/10962/d1002693 , Bank loans -- South Africa , Inflation (Finance) -- South Africa , Money supply -- South Africa , Interest rates -- South Africa , Banks and banking -- South Africa , Foreign exchange rates -- South Africa
- Description: This study investigates the contribution of bank credit extension to the private sector to inflation in South Africa, covering the period 1970:1-2006:4. The long-run impact of bank credit on inflation is investigated by means of the Johansen co integration model. The short-run ynamics of the inflation is subsequently modelled by means of the Vector Error Correction Model (VECM). Using the Johansen methodology, the study identifies two co integrating equations linking inflation and its eterminants. The results suggest that the long-run relationship between inflation and bank credit to the private sector is negative and statistically significant at 10% level. The determinants that are significant at 5% level are: money supply, real gross domestic product, the money market rate, rand/dollar exchange rate and imports. The results are consistent with previous findings. The speed of adjustment in response to deviation from the equilibrium path was found to be negative at 10.56% per quarter, which is consistent with findings by Ohnsorge and Oomes (2003) for Russia. Both the signs and the magnitude of the coefficients suggest that the co integrating vector describes a long-run inflation equation. The impulse response functions confirm the theoretical expectations except for the import prices. The most persistent and significant shocks observed are on impulse response functions of money supply and bank credit to the private sector. The variance decomposition results also suggest that inflation responds quicker to innovations from money supply and the money market rate. The overall results provide evidence that the surge in inflation is associated with an increase in money supply as well as the instability in exchange rate. The effects of exchange rate fluctuation on inflation are reflected through changes in import prices. Based on the results we conclude that an increase in bank credit during the period 1970:1-2006:4 had a negative mpact on inflation in South Africa.
- Full Text:
- Date Issued: 2009
- Authors: Dlamini, Samuel Nkosinathi
- Date: 2009
- Subjects: Bank loans -- South Africa , Inflation (Finance) -- South Africa , Money supply -- South Africa , Interest rates -- South Africa , Banks and banking -- South Africa , Foreign exchange rates -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:959 , http://hdl.handle.net/10962/d1002693 , Bank loans -- South Africa , Inflation (Finance) -- South Africa , Money supply -- South Africa , Interest rates -- South Africa , Banks and banking -- South Africa , Foreign exchange rates -- South Africa
- Description: This study investigates the contribution of bank credit extension to the private sector to inflation in South Africa, covering the period 1970:1-2006:4. The long-run impact of bank credit on inflation is investigated by means of the Johansen co integration model. The short-run ynamics of the inflation is subsequently modelled by means of the Vector Error Correction Model (VECM). Using the Johansen methodology, the study identifies two co integrating equations linking inflation and its eterminants. The results suggest that the long-run relationship between inflation and bank credit to the private sector is negative and statistically significant at 10% level. The determinants that are significant at 5% level are: money supply, real gross domestic product, the money market rate, rand/dollar exchange rate and imports. The results are consistent with previous findings. The speed of adjustment in response to deviation from the equilibrium path was found to be negative at 10.56% per quarter, which is consistent with findings by Ohnsorge and Oomes (2003) for Russia. Both the signs and the magnitude of the coefficients suggest that the co integrating vector describes a long-run inflation equation. The impulse response functions confirm the theoretical expectations except for the import prices. The most persistent and significant shocks observed are on impulse response functions of money supply and bank credit to the private sector. The variance decomposition results also suggest that inflation responds quicker to innovations from money supply and the money market rate. The overall results provide evidence that the surge in inflation is associated with an increase in money supply as well as the instability in exchange rate. The effects of exchange rate fluctuation on inflation are reflected through changes in import prices. Based on the results we conclude that an increase in bank credit during the period 1970:1-2006:4 had a negative mpact on inflation in South Africa.
- Full Text:
- Date Issued: 2009
Bare life in the Bantustans (of the Eastern Cape): re-membering the centinnial South African nation-state
- Authors: Westaway, Ashley
- Date: 2009
- Subjects: Democracy -- South Africa , Homelands (South Africa) , Apartheid -- South Africa , Right of property -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD (History)
- Identifier: vital:11535 , http://hdl.handle.net/10353/149 , Democracy -- South Africa , Homelands (South Africa) , Apartheid -- South Africa , Right of property -- South Africa
- Description: This thesis argues that 1994 did not mark a point of absolute discontinuity in the history of South Africa. More specifically, it asserts that 1994 did not signal the end of segregationism; instead of democracy leading to national integration, the Bantustans are still governed and managed differently from the rest of the country. Consequently, it is no surprise that they remain mired in pervasive, debilitating poverty fifteen years after 1994. In insisting that contemporary South Africa is old (rather than new), the thesis seeks to make a contribution to political struggles that aim to bring to an end the segregationist past-in-the-present. The thesis is arranged in seven chapters. The first chapter considers the crisis that has engulfed South Africa historiography since 1994. It traces the roots of the crisis back to some of the fundamentals of the discipline of history, such as empiricism, neutrality and historicism. It suggests that the way to end the crisis, to re-assert the relevance of history, is for historians to re-invoke the practice of producing histories of the present, in an interested, deliberate manner. Chapter 2 narrows down the focus of the thesis to (past and present) property. It suggests that instead of understanding the constitutional protection of property rights and installation of a restitution process as the product of a compromise between adversarial negotiators, these outcomes are more correctly understood as emanating from consensus. The third chapter outlines the implementation of the restitution programme from 1994 to 2008. The productive value of restitution over this period is found not in what it has delivered to the claimants (supposedly the beneficiaries of the programme), but rather in its discursive effects related to citizenship in the new South Africa. Chapter 4 considers the exclusion of dispossession that was implemented in the Bantustans from the restitution programme. It argues that this decision was not an oversight on the part of the post-1994 government. Instead it was consistent with all other key policy decisions taken in the recent period. The Bantustans have been treated differently from the rest of South Africa; they have been deliberately under-developed, fabricated as welfare zones, and subjected to arbitrary customary rule. Whereas Chapters 2 to 4 look at the production of historical truth on the side of domination, Chapter 6 and 7 consider production on the side of resistance. Specifically, they describe and analyse the attempts of an NGO to establish the truths of betterment as dispossession, and post-1994 prejudice against the victims of betterment dispossession. They serve as case studies of third party-led processes that seek to produce truth-effects from within a prevailing truth regime. The final chapter attempts to bring many of the threads that weave through the thesis together, by means of a critical consideration of human rights discourse. The chapter calls on intellectuals to establish truths in relation to the history of ongoing human wrongs in South Africa (as opposed to the rainbow narrative of human rights) Finally, the thesis includes a postscript, comprising technical summaries of each of the chapters.
- Full Text:
- Date Issued: 2009
- Authors: Westaway, Ashley
- Date: 2009
- Subjects: Democracy -- South Africa , Homelands (South Africa) , Apartheid -- South Africa , Right of property -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD (History)
- Identifier: vital:11535 , http://hdl.handle.net/10353/149 , Democracy -- South Africa , Homelands (South Africa) , Apartheid -- South Africa , Right of property -- South Africa
- Description: This thesis argues that 1994 did not mark a point of absolute discontinuity in the history of South Africa. More specifically, it asserts that 1994 did not signal the end of segregationism; instead of democracy leading to national integration, the Bantustans are still governed and managed differently from the rest of the country. Consequently, it is no surprise that they remain mired in pervasive, debilitating poverty fifteen years after 1994. In insisting that contemporary South Africa is old (rather than new), the thesis seeks to make a contribution to political struggles that aim to bring to an end the segregationist past-in-the-present. The thesis is arranged in seven chapters. The first chapter considers the crisis that has engulfed South Africa historiography since 1994. It traces the roots of the crisis back to some of the fundamentals of the discipline of history, such as empiricism, neutrality and historicism. It suggests that the way to end the crisis, to re-assert the relevance of history, is for historians to re-invoke the practice of producing histories of the present, in an interested, deliberate manner. Chapter 2 narrows down the focus of the thesis to (past and present) property. It suggests that instead of understanding the constitutional protection of property rights and installation of a restitution process as the product of a compromise between adversarial negotiators, these outcomes are more correctly understood as emanating from consensus. The third chapter outlines the implementation of the restitution programme from 1994 to 2008. The productive value of restitution over this period is found not in what it has delivered to the claimants (supposedly the beneficiaries of the programme), but rather in its discursive effects related to citizenship in the new South Africa. Chapter 4 considers the exclusion of dispossession that was implemented in the Bantustans from the restitution programme. It argues that this decision was not an oversight on the part of the post-1994 government. Instead it was consistent with all other key policy decisions taken in the recent period. The Bantustans have been treated differently from the rest of South Africa; they have been deliberately under-developed, fabricated as welfare zones, and subjected to arbitrary customary rule. Whereas Chapters 2 to 4 look at the production of historical truth on the side of domination, Chapter 6 and 7 consider production on the side of resistance. Specifically, they describe and analyse the attempts of an NGO to establish the truths of betterment as dispossession, and post-1994 prejudice against the victims of betterment dispossession. They serve as case studies of third party-led processes that seek to produce truth-effects from within a prevailing truth regime. The final chapter attempts to bring many of the threads that weave through the thesis together, by means of a critical consideration of human rights discourse. The chapter calls on intellectuals to establish truths in relation to the history of ongoing human wrongs in South Africa (as opposed to the rainbow narrative of human rights) Finally, the thesis includes a postscript, comprising technical summaries of each of the chapters.
- Full Text:
- Date Issued: 2009
Benchmark value chain clusters, agglomeration economies and dynamic externalities : an intergrated approach to regional economic development
- Authors: Zeelie, Eben Johannes
- Date: 2009
- Subjects: Industrial clusters , Regional economics , Regional economic disparities , Economic development , Regional planning
- Language: English
- Type: Thesis , Doctoral , DBA
- Identifier: vital:8594 , http://hdl.handle.net/10948/1086 , Industrial clusters , Regional economics , Regional economic disparities , Economic development , Regional planning
- Description: From the broad overview of the cluster literature, the proposition emerges that the manipulation of regional economic structural and cluster factor conditions within a geographically proximate region can translate into sustainable regional economic growth outcomes. As a first step in exploring this research, a theoretical framework for the conceptualisation of industry clusters was established and a methodological framework applied to statistically identify major manufacturing value chain clusters in the Eastern Cape Province. This methodology combines a strength-of-linkage measure for all pairs of supply and use sectors (as revealed in the systematic analysis of intermediate purchasing and sales patterns in the South African Final Supply and Use Tables: 2002) with the application of Ward’s hierarchical cluster algorithm to map the national benchmark value chain clusters in the South African national economy. The ensuing national value chain benchmark cluster framework was then transposed to the Eastern Cape Province to reveal cluster concentrations and gaps that exist in the value chain clusters in the province. The methodology applied in this study provides an objective and clear perspective of inter-industry linkages in the South African economy and produces more detailed and evenly distributed clusters than traditional cluster identification methodologies. Secondary linkages were determined for each of the twenty-six core value chain clusters to depict the diversity of sectors linked to the respective core clusters. In transposing the national benchmark value chain cluster framework onto the Eastern Cape Province economy, a number of distinct advantages emerge. Firstly, it reveals gaps in value chain cluster groupings that may be filled through industry recruiting or regional business development strategies. However, not all industries absent from value chain clusters in the region are equally attractive for recruitment. Henceforth, the number of direct and indirect linkages to industries absent from the Eastern Cape Province serves as a measure of their relative attractiveness when considering their recruitment into the region. vi The benchmark value chain cluster framework alone does not explain which agglomeration externalities are generated and exploited within each cluster, but it served as the overarching framework for the remainder of the research. Accordingly, the value chain cluster framework was applied to evidence whether specialisation, competition or diversity (represented by MAR, Porter and Jacobs economies respectively) is the operative mechanism in generating cluster growth in the Eastern Cape Province. Since agglomeration externalities are not directly observable, construct-valid indicators for the various externalities, as well as appropriate mechanisms to empirically assess the statistical relevance of MAR-, Porter and Jacobs economies in stimulating cluster growth, were established. This thesis added to agglomeration literature by disaggregating the standard measure of diversity externalities into two unique diversity indicators, namely supply diversity (SDiv) and use diversity (UDiv). The SDiv- and UDiv coefficients measure the degree to which a value chain cluster’s supplying/user sectoral mix at provincial level differs from that of the cluster grouping at the national level. This distinction between supply-and use diversity developed in this study firstly provides a clearer insight into the relative regional presence of supplying- and using sectors to the various value chain clusters, and secondly, serves as a useful mechanism to regional policymakers in identifying industries that may be targeted for investment into a region. Therefore, by separating the diversity into its two components, a clear distinction can be drawn between the impact of supplying- and using sectors on value chain cluster growth in a particular region. From a narrow perspective, the empirical findings validate both the Marshall Arrow Romer- (small positive impact of regional cluster concentration) and the Jacobs theory (significant positive impact of cluster supply- and use diversity on cluster growth), while it invalidates Porter’s theory (no correlation between competition and cluster performance). The positive effect size recorded between the level of value chain cluster concentration and differential growth indicates that policy makers in the Eastern Cape Province will be well advised to direct growth interventions towards larger concentrated clusters, than towards smaller, incipient value chain clusters. Additionally, vii the effectiveness of targeted inward FDI to the Eastern Cape Province may be raised by evaluating the economic impact against current value chain cluster structure, as well as the effect on the supply- and use diversities of existing value chain clusters in the province. This thesis has also illustrated that value chain clusters that are concentrated in the region, show a positive effect size with the level of supply diversity in the region. Conversely, value chain clusters that reflect high levels of competitiveness record a positive effect size with use diversity. Policy interventions aimed at raising the performance of value chain clusters typified by smaller players in a competitive environment, should therefore consider raising the respective levels of use diversity in the region. This research awakens the proposition that a reliance on a serendipitous approach to generate dynamic externalities is not sufficient, and that certain factor conditions favour the transfer of tacit knowledge between cluster members. Accordingly, this research empirically explored whether statistically significant relationships can be detected between the common cluster elements, or factor conditions, that serve as conduits for the transfer of dynamic externalities and value chain cluster growth in the Eastern Cape Province. The findings indicate that linkages with knowledge generating institutions in the Eastern Cape Province do, albeit to a relatively small extent, have an impact on value chain cluster growth, and validates the assertion that cognitive enhancing institutions contribute to cluster growth. The importance of backward and forward linkages in nurturing regional growth is signified by the moderate effect size recorded by the level of vertical linkages and total value chain cluster growth. Similarly, a moderate effect size was recorded between the level of horizontal linkages and value chain cluster growth, which shows that cooperation amongst competing firms do stimulate cluster and regional growth in the Eastern Cape Province and affirms the proposition that inter-firm linkages on both vertical- and horizontal levels stimulate cluster growth. An expectation was that the institutional framework conditions would have a significant impact on value chain cluster growth in the Eastern Cape Province. However, the empirical findings reflect that the institutional framework conditions have no statistical impact on value chain cluster growth. The study also found a moderate, positive effect size between value chain cluster size (number of employees) and growth, which shows viii that size matters in regional growth. In other words, in contrast to their European counterparts, the larger the number of employees per value chain cluster, the greater the impact on value chain cluster growth in the Eastern Cape Province.
- Full Text:
- Date Issued: 2009
- Authors: Zeelie, Eben Johannes
- Date: 2009
- Subjects: Industrial clusters , Regional economics , Regional economic disparities , Economic development , Regional planning
- Language: English
- Type: Thesis , Doctoral , DBA
- Identifier: vital:8594 , http://hdl.handle.net/10948/1086 , Industrial clusters , Regional economics , Regional economic disparities , Economic development , Regional planning
- Description: From the broad overview of the cluster literature, the proposition emerges that the manipulation of regional economic structural and cluster factor conditions within a geographically proximate region can translate into sustainable regional economic growth outcomes. As a first step in exploring this research, a theoretical framework for the conceptualisation of industry clusters was established and a methodological framework applied to statistically identify major manufacturing value chain clusters in the Eastern Cape Province. This methodology combines a strength-of-linkage measure for all pairs of supply and use sectors (as revealed in the systematic analysis of intermediate purchasing and sales patterns in the South African Final Supply and Use Tables: 2002) with the application of Ward’s hierarchical cluster algorithm to map the national benchmark value chain clusters in the South African national economy. The ensuing national value chain benchmark cluster framework was then transposed to the Eastern Cape Province to reveal cluster concentrations and gaps that exist in the value chain clusters in the province. The methodology applied in this study provides an objective and clear perspective of inter-industry linkages in the South African economy and produces more detailed and evenly distributed clusters than traditional cluster identification methodologies. Secondary linkages were determined for each of the twenty-six core value chain clusters to depict the diversity of sectors linked to the respective core clusters. In transposing the national benchmark value chain cluster framework onto the Eastern Cape Province economy, a number of distinct advantages emerge. Firstly, it reveals gaps in value chain cluster groupings that may be filled through industry recruiting or regional business development strategies. However, not all industries absent from value chain clusters in the region are equally attractive for recruitment. Henceforth, the number of direct and indirect linkages to industries absent from the Eastern Cape Province serves as a measure of their relative attractiveness when considering their recruitment into the region. vi The benchmark value chain cluster framework alone does not explain which agglomeration externalities are generated and exploited within each cluster, but it served as the overarching framework for the remainder of the research. Accordingly, the value chain cluster framework was applied to evidence whether specialisation, competition or diversity (represented by MAR, Porter and Jacobs economies respectively) is the operative mechanism in generating cluster growth in the Eastern Cape Province. Since agglomeration externalities are not directly observable, construct-valid indicators for the various externalities, as well as appropriate mechanisms to empirically assess the statistical relevance of MAR-, Porter and Jacobs economies in stimulating cluster growth, were established. This thesis added to agglomeration literature by disaggregating the standard measure of diversity externalities into two unique diversity indicators, namely supply diversity (SDiv) and use diversity (UDiv). The SDiv- and UDiv coefficients measure the degree to which a value chain cluster’s supplying/user sectoral mix at provincial level differs from that of the cluster grouping at the national level. This distinction between supply-and use diversity developed in this study firstly provides a clearer insight into the relative regional presence of supplying- and using sectors to the various value chain clusters, and secondly, serves as a useful mechanism to regional policymakers in identifying industries that may be targeted for investment into a region. Therefore, by separating the diversity into its two components, a clear distinction can be drawn between the impact of supplying- and using sectors on value chain cluster growth in a particular region. From a narrow perspective, the empirical findings validate both the Marshall Arrow Romer- (small positive impact of regional cluster concentration) and the Jacobs theory (significant positive impact of cluster supply- and use diversity on cluster growth), while it invalidates Porter’s theory (no correlation between competition and cluster performance). The positive effect size recorded between the level of value chain cluster concentration and differential growth indicates that policy makers in the Eastern Cape Province will be well advised to direct growth interventions towards larger concentrated clusters, than towards smaller, incipient value chain clusters. Additionally, vii the effectiveness of targeted inward FDI to the Eastern Cape Province may be raised by evaluating the economic impact against current value chain cluster structure, as well as the effect on the supply- and use diversities of existing value chain clusters in the province. This thesis has also illustrated that value chain clusters that are concentrated in the region, show a positive effect size with the level of supply diversity in the region. Conversely, value chain clusters that reflect high levels of competitiveness record a positive effect size with use diversity. Policy interventions aimed at raising the performance of value chain clusters typified by smaller players in a competitive environment, should therefore consider raising the respective levels of use diversity in the region. This research awakens the proposition that a reliance on a serendipitous approach to generate dynamic externalities is not sufficient, and that certain factor conditions favour the transfer of tacit knowledge between cluster members. Accordingly, this research empirically explored whether statistically significant relationships can be detected between the common cluster elements, or factor conditions, that serve as conduits for the transfer of dynamic externalities and value chain cluster growth in the Eastern Cape Province. The findings indicate that linkages with knowledge generating institutions in the Eastern Cape Province do, albeit to a relatively small extent, have an impact on value chain cluster growth, and validates the assertion that cognitive enhancing institutions contribute to cluster growth. The importance of backward and forward linkages in nurturing regional growth is signified by the moderate effect size recorded by the level of vertical linkages and total value chain cluster growth. Similarly, a moderate effect size was recorded between the level of horizontal linkages and value chain cluster growth, which shows that cooperation amongst competing firms do stimulate cluster and regional growth in the Eastern Cape Province and affirms the proposition that inter-firm linkages on both vertical- and horizontal levels stimulate cluster growth. An expectation was that the institutional framework conditions would have a significant impact on value chain cluster growth in the Eastern Cape Province. However, the empirical findings reflect that the institutional framework conditions have no statistical impact on value chain cluster growth. The study also found a moderate, positive effect size between value chain cluster size (number of employees) and growth, which shows viii that size matters in regional growth. In other words, in contrast to their European counterparts, the larger the number of employees per value chain cluster, the greater the impact on value chain cluster growth in the Eastern Cape Province.
- Full Text:
- Date Issued: 2009
Between self and author : an autoethnographic approach towards the crafting of reflexive compositions in post graduate drama studies
- Authors: Moyo, Awelani Lena
- Date: 2009
- Subjects: Drama -- Study and teachng (Higher) College and school drama
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2143 , http://hdl.handle.net/10962/d1002375
- Description: This thesis explores the merits of reflexivity in the processes of creating a performance and of performing research in Drama Studies. In it, I make a case for the validity of autobiographical material as an aid to generating such reflexivity. Through an autoethnographic case study of my work entitled Compositions (a series of performance projects) in which I focus on the theme of migration, I provide an indepth account of my experiences, focusing specifically on the interrelated concerns of body, space and journey in my ritualistic performance. My examination explores the dynamic effects of liminality within identity politics, through which I foreground several issues of concern which I have encountered as an emerging scholar and theatremaker working within an academic institution. I propose that the process of studying drama in a University ultimately requires one to continually negotiate a range of subject positions, whilst finding connections between these various identities that one may take up during the course of one’s studies. By developing an awareness of the overlapping of such identities and inhabiting the spaces in-between subject positions, I demonstrate how taking into account one’s personal lived experience can help illuminate one’s understanding of both the work of art and the research report, as well as the broader contexts in which such practice-based work exists. I illustrate how such an understanding has ultimately maximised the knowledge and learning that I have gathered, and has contributed to the crucial project of developing my authorial voice in writing and performance, which is central to the aims of the Master of Arts degree in Drama.
- Full Text:
- Date Issued: 2009
- Authors: Moyo, Awelani Lena
- Date: 2009
- Subjects: Drama -- Study and teachng (Higher) College and school drama
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2143 , http://hdl.handle.net/10962/d1002375
- Description: This thesis explores the merits of reflexivity in the processes of creating a performance and of performing research in Drama Studies. In it, I make a case for the validity of autobiographical material as an aid to generating such reflexivity. Through an autoethnographic case study of my work entitled Compositions (a series of performance projects) in which I focus on the theme of migration, I provide an indepth account of my experiences, focusing specifically on the interrelated concerns of body, space and journey in my ritualistic performance. My examination explores the dynamic effects of liminality within identity politics, through which I foreground several issues of concern which I have encountered as an emerging scholar and theatremaker working within an academic institution. I propose that the process of studying drama in a University ultimately requires one to continually negotiate a range of subject positions, whilst finding connections between these various identities that one may take up during the course of one’s studies. By developing an awareness of the overlapping of such identities and inhabiting the spaces in-between subject positions, I demonstrate how taking into account one’s personal lived experience can help illuminate one’s understanding of both the work of art and the research report, as well as the broader contexts in which such practice-based work exists. I illustrate how such an understanding has ultimately maximised the knowledge and learning that I have gathered, and has contributed to the crucial project of developing my authorial voice in writing and performance, which is central to the aims of the Master of Arts degree in Drama.
- Full Text:
- Date Issued: 2009
Bioconditioning and nitrogen fertility effects of selected cyanobacteria strains on two degraded soils in the Eastern Cape Province, South Africa
- Authors: Maqubela, Mfundo Phakama
- Date: 2009
- Subjects: Nostoc , Cyanobacteria , Soil fertility -- Testing , Soils -- Nitrogen content , Cyanobacteria -- Biotechnology
- Language: English
- Type: Thesis , Doctoral , PhD (Soil Science)
- Identifier: vital:11959 , http://hdl.handle.net/10353/558 , Nostoc , Cyanobacteria , Soil fertility -- Testing , Soils -- Nitrogen content , Cyanobacteria -- Biotechnology
- Description: Some cyanobacteria strains have biofertilization and bioconditioning effects in soils. The objective of this study was to identify cyanobacteria with potential to improve the N fertility and structural stability of degraded soils and evaluate their effectiveness in soils of the Eastern Cape, South Africa. Isolation and characterization of the indigenous cyanobacteria strains with desirable properties was first to be undertaken because their effects are known to differ from strain to strain. Cyanobacteria strains 3g, 3v, and 7e were identified from 97 strains isolated from selected soils. Nostoc strains 3g and 3v had greater ability to produce exocellular polysaccharides (EPS) but low potential to fix atmospheric N2 (4.7 and 1.3 nmol C2H4 μg chl-1 h-1, respectively). On the other hand, strain 7e had the highest capability to fix atmospheric N2 (16.1 nmol C2H4 μg chl-1 h-1) but had the least ability to produce EPS. Evaluation of the strains was done in glasshouse studies starting with Nostoc strain 9v isolated from a Tanzanian soil, followed by the indigenous strains isolated from soils in Hertzog and Qunu, South Africa. Inoculation was done by uniformly applying cyanobacteria on the surface of potted soils at a rate of 6 g m-2. First harvest and soil sampling took place after six weeks, and the top 25 mm of the soil was mixed, replanted, and sampled again after a further six weeks (second harvest). Inoculation with Nostoc strain 9v increased soil N by 40 percent and 17 percent in Guquka and Hertzog soils, respectively, and consequently increased maize dry matter yields by 40 and 49 percent. Soil C increased by 27 percent and 8 percent in Guquka and Hertzog soils, respectively, and this increase was significantly associated with that of soil N (R2 = 0.838). Higher contents of soil C, soil N and mineral N, however, were found in non-cropped soils. Scanning Electron Microscopy (SEM) revealed coatings of EPS on soil particles and fragments of non-cropped inoculated soils, with iii other particles enmeshed in networks of filaments, in contrast to cropped and/or non-inoculated soils. The proportion of very stable aggregates was increased by inoculation but cropping with maize reduced the aggregate stability. Inoculating Hertzog soil with indigenous strains 3g and 7e increased the nitrate N in the first cropping by 49 percent and 69 percent respectively, in cropped soils. In the second cropping increases in mineral N were 41 percent and 43 percent in 3g and 7e inoculated soils, respectively. Maize dry matter yields were higher on inoculated soils both in the first and second harvest in response to the improved N status of the soil. Increases in aggregate MWD in cropped soil as determined by fast wetting, mechanical breakdown and slow wetting were 85 percent, 33 percent, 33 percent, respectively, for 3g inoculation, 64 percent, 41 percent, and 41 percent, respectively, for 7e inoculation and 60 percent, 24 percent, 50 percent for inoculation with 9v. In non-cropped soil, increases in MWD as determined by fast wetting, mechanical breakdown and slow wetting were 11 percent, 0 percent, 7 percent, respectively for 3g inoculation, 21 percent, 11 percent, and 7 percent, respectively for 7e inoculation, and 25 percent, 36 percent, and 19 percent for strain 9v inoculation. Scanning electron microscopy observations, which were confirmed by chemical results, revealed that inoculated soils had high EPS and filaments that encouraged soil aggregation and improved aggregate stability. Results of this study show that cyanobacteria strains isolated and selected for their ability to fix atmospheric N2 and produce EPS improved the fertility status and aggregate stability of degraded soils from South Africa.
- Full Text:
- Date Issued: 2009
- Authors: Maqubela, Mfundo Phakama
- Date: 2009
- Subjects: Nostoc , Cyanobacteria , Soil fertility -- Testing , Soils -- Nitrogen content , Cyanobacteria -- Biotechnology
- Language: English
- Type: Thesis , Doctoral , PhD (Soil Science)
- Identifier: vital:11959 , http://hdl.handle.net/10353/558 , Nostoc , Cyanobacteria , Soil fertility -- Testing , Soils -- Nitrogen content , Cyanobacteria -- Biotechnology
- Description: Some cyanobacteria strains have biofertilization and bioconditioning effects in soils. The objective of this study was to identify cyanobacteria with potential to improve the N fertility and structural stability of degraded soils and evaluate their effectiveness in soils of the Eastern Cape, South Africa. Isolation and characterization of the indigenous cyanobacteria strains with desirable properties was first to be undertaken because their effects are known to differ from strain to strain. Cyanobacteria strains 3g, 3v, and 7e were identified from 97 strains isolated from selected soils. Nostoc strains 3g and 3v had greater ability to produce exocellular polysaccharides (EPS) but low potential to fix atmospheric N2 (4.7 and 1.3 nmol C2H4 μg chl-1 h-1, respectively). On the other hand, strain 7e had the highest capability to fix atmospheric N2 (16.1 nmol C2H4 μg chl-1 h-1) but had the least ability to produce EPS. Evaluation of the strains was done in glasshouse studies starting with Nostoc strain 9v isolated from a Tanzanian soil, followed by the indigenous strains isolated from soils in Hertzog and Qunu, South Africa. Inoculation was done by uniformly applying cyanobacteria on the surface of potted soils at a rate of 6 g m-2. First harvest and soil sampling took place after six weeks, and the top 25 mm of the soil was mixed, replanted, and sampled again after a further six weeks (second harvest). Inoculation with Nostoc strain 9v increased soil N by 40 percent and 17 percent in Guquka and Hertzog soils, respectively, and consequently increased maize dry matter yields by 40 and 49 percent. Soil C increased by 27 percent and 8 percent in Guquka and Hertzog soils, respectively, and this increase was significantly associated with that of soil N (R2 = 0.838). Higher contents of soil C, soil N and mineral N, however, were found in non-cropped soils. Scanning Electron Microscopy (SEM) revealed coatings of EPS on soil particles and fragments of non-cropped inoculated soils, with iii other particles enmeshed in networks of filaments, in contrast to cropped and/or non-inoculated soils. The proportion of very stable aggregates was increased by inoculation but cropping with maize reduced the aggregate stability. Inoculating Hertzog soil with indigenous strains 3g and 7e increased the nitrate N in the first cropping by 49 percent and 69 percent respectively, in cropped soils. In the second cropping increases in mineral N were 41 percent and 43 percent in 3g and 7e inoculated soils, respectively. Maize dry matter yields were higher on inoculated soils both in the first and second harvest in response to the improved N status of the soil. Increases in aggregate MWD in cropped soil as determined by fast wetting, mechanical breakdown and slow wetting were 85 percent, 33 percent, 33 percent, respectively, for 3g inoculation, 64 percent, 41 percent, and 41 percent, respectively, for 7e inoculation and 60 percent, 24 percent, 50 percent for inoculation with 9v. In non-cropped soil, increases in MWD as determined by fast wetting, mechanical breakdown and slow wetting were 11 percent, 0 percent, 7 percent, respectively for 3g inoculation, 21 percent, 11 percent, and 7 percent, respectively for 7e inoculation, and 25 percent, 36 percent, and 19 percent for strain 9v inoculation. Scanning electron microscopy observations, which were confirmed by chemical results, revealed that inoculated soils had high EPS and filaments that encouraged soil aggregation and improved aggregate stability. Results of this study show that cyanobacteria strains isolated and selected for their ability to fix atmospheric N2 and produce EPS improved the fertility status and aggregate stability of degraded soils from South Africa.
- Full Text:
- Date Issued: 2009
Biological activities of medicinal plants traditionally used to treat Septicaemia in the Eastern Cape, South Africa
- Authors: Chinyama, Robert Fred
- Date: 2009
- Subjects: Materia medica, Vegetable -- South Africa -- Eastern Cape , Medicinal plants -- South Africa -- Eastern Cape , Traditional medicine -- South Africa -- Eastern Cape , Herbs -- Therapeutic use -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10119 , http://hdl.handle.net/10948/1274 , Materia medica, Vegetable -- South Africa -- Eastern Cape , Medicinal plants -- South Africa -- Eastern Cape , Traditional medicine -- South Africa -- Eastern Cape , Herbs -- Therapeutic use -- South Africa -- Eastern Cape
- Description: Over the past 25 years, there has been a resurgence of worldwide scientific research in the fields of ethnopharmacology. The Western world has acknowledged the continued use of traditional medicines by the majority of third world countries, and the need for novel drug development. Hence, much of the pharmaceutical research in recent years has focused on the ethnobotanical approach to drug discovery (Light et al., 2005). In South Africa, as in most developing parts of the world, traditional herbal medicine still forms the backbone of rural healthcare. The government health services in South Africa provide only western medical care although the majority of the population consult traditional healers for some or all of their healthcare needs (McGaw et al., 2005). Medicinal plants like Harpephyllum caffrum are used as blood purifiers or emetics (Watt and Breyer-Brandwijk, 1962), and also for treating acne and eczema. The antimicrobial activity of this plant can be used to treat septicaemia, which is ranked the sixth leading cause of death among neonates and the eighth leading cause of death for infants through the first year of life (Heron, 2007). In this study, the plants investigated for antimicrobial activity were Harpephyllum caffrum, Hermannia cuneifolia, Chironia baccifera, Rhigozum obovatum, Felicia muricata and Pentzia incana. These plants were tested against ATTC (American Type Culture Collection) strains and microorganisms isolated from clinical isolates of patients suffering from septicaemia. The assay methods used included the agar diffusion method using the Mast multipoint inoculator, the microtitre dilution method were used to determine the minimum inhibitory concentration, thin layer chromatography fingerprints accompanied by bioautographic assay were used to detect the inhibition of bacterial growth by active compounds separated from plant extracts and the Ames test was required to assess the possibility of bacterial mutagenesis upon the exposure to plant extracts which can lead to carcinogenicity. In agar diffusion method, extracts of Harpephyllum caffrum inhibited nine strains of Candida albicans, three species of Acinetobacter and four strains of E.faecalis. Extracts of Hermannia cuneifolia inhibited four strains of B.cereus and three strains of Staphylococcus aureus. Extracts of Chironia baccifera inhibited one strain of Acinetobacter and five strains of E.faecalis. Extracts of plants Rhigozum obovatum, Felicia muricata, and Pentzia incana showed no antimicrobial activity. In the microtitre dilution method used to determine the minimum inhibitory concentration (MIC), the results were different from the agar diffusion method. More activity was observed. Extracts of Harpephyllum caffrum inhibited three strains of E.coli, six strains of S.aureus, three species of Acinetobacter and one strain of Klebsiella pneumonia. Extracts of Hermannia cuneifolia inhibited four strains of B.cereus, three strains of S.aureus, two strains of K.oxytoca and one species of Acinetobacter. Extracts of Chironia baccifera inhibited three strains of S.aureus, one strain of MRSA, one species of Acinetobacter and one strain of S.haemolyticus. The MIC values ranged from 0.049 to 6.25mg/ml. Using the thin layer chromatography fingerprints, bioautography showed the presence of various inhibitory chemical compounds. Methanol and acetone extracts of Harpephyllum caffrum, separated very well and showed various inhibition zones on exposure to Candida albicans, Enterococcus faecalis and Staphylococcus aureus. The different inhibition zones were recorded as Rf In the Ames test (Maron and Ames, 1983) the methanol and acetone extracts of Harpephyllum caffrum and Hermannia cuneifolia were negative which means they were devoid of any mutagenic properties. Methanol extracts of Harpephyllum caffrum showed similar results in the Ames assay as reported by Verschaeve and Van Staden (2008). values ranging from 0.25 to 0.95. The zones indicate the different inhibiting chemical compounds present in the plant. Petroleum ether, ethyl acetate, chloroform and formic acid were the solvents used in the assay in the ratio 8:7:5:1, respectively. Establishing the antimicrobial activity of these plants contribute to the systematic scientific investigation of indigenous South African medicinal plants.
- Full Text:
- Date Issued: 2009
- Authors: Chinyama, Robert Fred
- Date: 2009
- Subjects: Materia medica, Vegetable -- South Africa -- Eastern Cape , Medicinal plants -- South Africa -- Eastern Cape , Traditional medicine -- South Africa -- Eastern Cape , Herbs -- Therapeutic use -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10119 , http://hdl.handle.net/10948/1274 , Materia medica, Vegetable -- South Africa -- Eastern Cape , Medicinal plants -- South Africa -- Eastern Cape , Traditional medicine -- South Africa -- Eastern Cape , Herbs -- Therapeutic use -- South Africa -- Eastern Cape
- Description: Over the past 25 years, there has been a resurgence of worldwide scientific research in the fields of ethnopharmacology. The Western world has acknowledged the continued use of traditional medicines by the majority of third world countries, and the need for novel drug development. Hence, much of the pharmaceutical research in recent years has focused on the ethnobotanical approach to drug discovery (Light et al., 2005). In South Africa, as in most developing parts of the world, traditional herbal medicine still forms the backbone of rural healthcare. The government health services in South Africa provide only western medical care although the majority of the population consult traditional healers for some or all of their healthcare needs (McGaw et al., 2005). Medicinal plants like Harpephyllum caffrum are used as blood purifiers or emetics (Watt and Breyer-Brandwijk, 1962), and also for treating acne and eczema. The antimicrobial activity of this plant can be used to treat septicaemia, which is ranked the sixth leading cause of death among neonates and the eighth leading cause of death for infants through the first year of life (Heron, 2007). In this study, the plants investigated for antimicrobial activity were Harpephyllum caffrum, Hermannia cuneifolia, Chironia baccifera, Rhigozum obovatum, Felicia muricata and Pentzia incana. These plants were tested against ATTC (American Type Culture Collection) strains and microorganisms isolated from clinical isolates of patients suffering from septicaemia. The assay methods used included the agar diffusion method using the Mast multipoint inoculator, the microtitre dilution method were used to determine the minimum inhibitory concentration, thin layer chromatography fingerprints accompanied by bioautographic assay were used to detect the inhibition of bacterial growth by active compounds separated from plant extracts and the Ames test was required to assess the possibility of bacterial mutagenesis upon the exposure to plant extracts which can lead to carcinogenicity. In agar diffusion method, extracts of Harpephyllum caffrum inhibited nine strains of Candida albicans, three species of Acinetobacter and four strains of E.faecalis. Extracts of Hermannia cuneifolia inhibited four strains of B.cereus and three strains of Staphylococcus aureus. Extracts of Chironia baccifera inhibited one strain of Acinetobacter and five strains of E.faecalis. Extracts of plants Rhigozum obovatum, Felicia muricata, and Pentzia incana showed no antimicrobial activity. In the microtitre dilution method used to determine the minimum inhibitory concentration (MIC), the results were different from the agar diffusion method. More activity was observed. Extracts of Harpephyllum caffrum inhibited three strains of E.coli, six strains of S.aureus, three species of Acinetobacter and one strain of Klebsiella pneumonia. Extracts of Hermannia cuneifolia inhibited four strains of B.cereus, three strains of S.aureus, two strains of K.oxytoca and one species of Acinetobacter. Extracts of Chironia baccifera inhibited three strains of S.aureus, one strain of MRSA, one species of Acinetobacter and one strain of S.haemolyticus. The MIC values ranged from 0.049 to 6.25mg/ml. Using the thin layer chromatography fingerprints, bioautography showed the presence of various inhibitory chemical compounds. Methanol and acetone extracts of Harpephyllum caffrum, separated very well and showed various inhibition zones on exposure to Candida albicans, Enterococcus faecalis and Staphylococcus aureus. The different inhibition zones were recorded as Rf In the Ames test (Maron and Ames, 1983) the methanol and acetone extracts of Harpephyllum caffrum and Hermannia cuneifolia were negative which means they were devoid of any mutagenic properties. Methanol extracts of Harpephyllum caffrum showed similar results in the Ames assay as reported by Verschaeve and Van Staden (2008). values ranging from 0.25 to 0.95. The zones indicate the different inhibiting chemical compounds present in the plant. Petroleum ether, ethyl acetate, chloroform and formic acid were the solvents used in the assay in the ratio 8:7:5:1, respectively. Establishing the antimicrobial activity of these plants contribute to the systematic scientific investigation of indigenous South African medicinal plants.
- Full Text:
- Date Issued: 2009
Bond market development in emerging economies: a case study of the Bond Exchange of South Africa (BESA)
- Authors: Hove, Tagara
- Date: 2009
- Subjects: Bond Exchange of South Africa , Bond market -- South Africa , Foreign exchange rates -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:961 , http://hdl.handle.net/10962/d1002695 , Bond Exchange of South Africa , Bond market -- South Africa , Foreign exchange rates -- South Africa
- Description: This study looks at the development of bond markets in emerging economies and focuses on the development of the Bond Exchange of South Africa (BESA). It explores the history, structure, performance and key issues related to the development of this market within the broader context of domestic, regional and global bond market development. BESA's experience provides valuable lessons for other emerging market economies also seeking to build bond markets. The sophistication of the local bond market is not enough to make it appealing to foreign borrowers. Market development demands an enabling market infrastructure and a background of macroeconomic stability, diversified market participants, deregulation of capital flows and an appropriate regulatory and supervisory environment.
- Full Text:
- Date Issued: 2009
- Authors: Hove, Tagara
- Date: 2009
- Subjects: Bond Exchange of South Africa , Bond market -- South Africa , Foreign exchange rates -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:961 , http://hdl.handle.net/10962/d1002695 , Bond Exchange of South Africa , Bond market -- South Africa , Foreign exchange rates -- South Africa
- Description: This study looks at the development of bond markets in emerging economies and focuses on the development of the Bond Exchange of South Africa (BESA). It explores the history, structure, performance and key issues related to the development of this market within the broader context of domestic, regional and global bond market development. BESA's experience provides valuable lessons for other emerging market economies also seeking to build bond markets. The sophistication of the local bond market is not enough to make it appealing to foreign borrowers. Market development demands an enabling market infrastructure and a background of macroeconomic stability, diversified market participants, deregulation of capital flows and an appropriate regulatory and supervisory environment.
- Full Text:
- Date Issued: 2009