Stirring the hornet's nest: women's citizenship and childcare in post-apartheid South Africa
- Authors: Alfers, Laura Corrigall
- Date: 2006
- Subjects: Women's rights -- South Africa , Citizenship -- South Africa , Women -- Political activity , Feminist theory -- Political aspects , Child care -- South Africa , Sex discrimination against women
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2757 , http://hdl.handle.net/10962/d1002967 , Women's rights -- South Africa , Citizenship -- South Africa , Women -- Political activity , Feminist theory -- Political aspects , Child care -- South Africa , Sex discrimination against women
- Description: It is a widely acknowledged fact that women’s access to the full rights of citizenship in the liberal state is restricted because of their unequal responsibility for childcare. The South African state, however, despite its theoretical commitment to gender equality, has failed substantially to engage with the issue of childcare and women’s citizenship. This is problematic because in failing to envisage a role for itself in supporting women with their responsibility for childcare, the state has not only neglected its Constitutional commitments to gender equality, but it has also failed to realise the benefits that could potentially accrue to children if women’s access to economic citizenship is not hampered by childcare. Recognising this problem, this thesis attempts to engender some debate as to how the South African state could feasibly correct this failure. In doing so, it uses feminist political theory as a basis and takes a critical view of the two childcare policies that have dominated the debate over women’s citizenship and childcare in Western liberal democracies – socialised care and the neofamilialist model. In concluding it attempts to provide an idea of what feasible, state-based childcare policies could look like in present-day South Africa.
- Full Text:
- Date Issued: 2006
- Authors: Alfers, Laura Corrigall
- Date: 2006
- Subjects: Women's rights -- South Africa , Citizenship -- South Africa , Women -- Political activity , Feminist theory -- Political aspects , Child care -- South Africa , Sex discrimination against women
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2757 , http://hdl.handle.net/10962/d1002967 , Women's rights -- South Africa , Citizenship -- South Africa , Women -- Political activity , Feminist theory -- Political aspects , Child care -- South Africa , Sex discrimination against women
- Description: It is a widely acknowledged fact that women’s access to the full rights of citizenship in the liberal state is restricted because of their unequal responsibility for childcare. The South African state, however, despite its theoretical commitment to gender equality, has failed substantially to engage with the issue of childcare and women’s citizenship. This is problematic because in failing to envisage a role for itself in supporting women with their responsibility for childcare, the state has not only neglected its Constitutional commitments to gender equality, but it has also failed to realise the benefits that could potentially accrue to children if women’s access to economic citizenship is not hampered by childcare. Recognising this problem, this thesis attempts to engender some debate as to how the South African state could feasibly correct this failure. In doing so, it uses feminist political theory as a basis and takes a critical view of the two childcare policies that have dominated the debate over women’s citizenship and childcare in Western liberal democracies – socialised care and the neofamilialist model. In concluding it attempts to provide an idea of what feasible, state-based childcare policies could look like in present-day South Africa.
- Full Text:
- Date Issued: 2006
Security community building? : an assessment of Southern African regional integration in the post-apartheid era
- Authors: Lekhooa, Tumo
- Date: 2006
- Subjects: South Africa -- Politics and government -- 1994- , Africa, Southern -- Economic integration , National security -- Africa, Southern , Political stability -- Africa, Southern , Southern African Development Community
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2844 , http://hdl.handle.net/10962/d1005958 , South Africa -- Politics and government -- 1994- , Africa, Southern -- Economic integration , National security -- Africa, Southern , Political stability -- Africa, Southern , Southern African Development Community
- Description: The thesis traces Southern African security dimensions from the Cold War and the period of apartheid in South Africa to the post-apartheid era. It makes an attempt to investigate the prospects of Southern Africa becoming a security community and the processes and practices underlying these efforts. Using the constructivist theory approach to international relations, the thesis argues that the preoccupation with principles of sovereignty and non-interference, a lack of political will and the absence of common values that could help SADC institute binding rules and decision-making are the main blocks that prevent the region from asserting itself as a security community. All these militate against the idea of mutual accountability among SADC member states and have a negative impact on the institutional and functional capacity of SADC. This also prevents SADC from dealing with the emerging non-military human security threats in the region. In consideration of this, the thesis argues that the idea of security community building in Southern Africa remains not only a regional issue, but also requires the involvement of extra-regional actors.
- Full Text:
- Date Issued: 2006
- Authors: Lekhooa, Tumo
- Date: 2006
- Subjects: South Africa -- Politics and government -- 1994- , Africa, Southern -- Economic integration , National security -- Africa, Southern , Political stability -- Africa, Southern , Southern African Development Community
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2844 , http://hdl.handle.net/10962/d1005958 , South Africa -- Politics and government -- 1994- , Africa, Southern -- Economic integration , National security -- Africa, Southern , Political stability -- Africa, Southern , Southern African Development Community
- Description: The thesis traces Southern African security dimensions from the Cold War and the period of apartheid in South Africa to the post-apartheid era. It makes an attempt to investigate the prospects of Southern Africa becoming a security community and the processes and practices underlying these efforts. Using the constructivist theory approach to international relations, the thesis argues that the preoccupation with principles of sovereignty and non-interference, a lack of political will and the absence of common values that could help SADC institute binding rules and decision-making are the main blocks that prevent the region from asserting itself as a security community. All these militate against the idea of mutual accountability among SADC member states and have a negative impact on the institutional and functional capacity of SADC. This also prevents SADC from dealing with the emerging non-military human security threats in the region. In consideration of this, the thesis argues that the idea of security community building in Southern Africa remains not only a regional issue, but also requires the involvement of extra-regional actors.
- Full Text:
- Date Issued: 2006
Competing interests and change within the pharmacy education system in South Africa
- Authors: Allan, Lucie
- Date: 2006
- Subjects: Pharmacy -- South Africa Pharmacy -- Study and teaching -- South Africa Pharmacy -- Practice -- South Africa Community pharmacy services -- South Africa Community health services -- South Africa
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3741 , http://hdl.handle.net/10962/d1003219
- Description: This thesis provides a historical account of the emergence of the pharmacy education system in South Africa, and an analysis of the influence of competing interest groups over the pharmacy education curriculum. It provides a critical evaluation of structural-consensus and micro-interpretive approaches to medical and pharmacy education, and sets out a macrointerpretive account of pharmacy education in South Africa. Following Margaret Archer (1979) it analyzes three forms of negotiation between competing interest groups in their efforts to change the pharmacy curriculum; these are political manipulation, external transaction and internal initiation. The thesis argues that whilst the private sector interest group (comprising of retail, wholesale and manufacturing pharmacy) dominated the pharmacy education system until 1994, since then a newly emerged government interest group has begun to compete for educational control. The priorities pursued by this interest group have consistently reflected the objectives set out in the ANC National Health Plan of 1994. The thesis maintains that given its frustration over the non-implementation of the ANC’s health policy objectives, the government interest group is likely to resort to direct political manipulation by passing legislation to alter the content of the current pharmacy curriculum. Such changes would seek to ensure that the syllabus more accurately reflects the ANC Plan’s community health and primary health care objectives. The thesis asserts that such an outcome (of direct political manipulation of the curriculum) is not inevitable, and can be avoided through a process of internally initiated change. It presents the findings of an interpretive case study into how the Rhodes University Community Experience Programme (CEP) influenced final year pharmacy students’ perceptions of the role of the pharmacist. The students’ comments were collected by means of focus group interviews, participant observation and documentary analysis. Whilst the CEP did not successfully transform their concept of the pharmacist’s role, it did succeed in influencing students’ understanding of the notions of community pharmacy and primary health care in line with the government interest group’s health objectives. This thesis concludes that internally initiated change within the pharmacy education system, would be preferable to that imposed through external political manipulation, as such change would be more likely to preserve the independent professional interests of pharmacy academics.
- Full Text:
- Date Issued: 2006
- Authors: Allan, Lucie
- Date: 2006
- Subjects: Pharmacy -- South Africa Pharmacy -- Study and teaching -- South Africa Pharmacy -- Practice -- South Africa Community pharmacy services -- South Africa Community health services -- South Africa
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3741 , http://hdl.handle.net/10962/d1003219
- Description: This thesis provides a historical account of the emergence of the pharmacy education system in South Africa, and an analysis of the influence of competing interest groups over the pharmacy education curriculum. It provides a critical evaluation of structural-consensus and micro-interpretive approaches to medical and pharmacy education, and sets out a macrointerpretive account of pharmacy education in South Africa. Following Margaret Archer (1979) it analyzes three forms of negotiation between competing interest groups in their efforts to change the pharmacy curriculum; these are political manipulation, external transaction and internal initiation. The thesis argues that whilst the private sector interest group (comprising of retail, wholesale and manufacturing pharmacy) dominated the pharmacy education system until 1994, since then a newly emerged government interest group has begun to compete for educational control. The priorities pursued by this interest group have consistently reflected the objectives set out in the ANC National Health Plan of 1994. The thesis maintains that given its frustration over the non-implementation of the ANC’s health policy objectives, the government interest group is likely to resort to direct political manipulation by passing legislation to alter the content of the current pharmacy curriculum. Such changes would seek to ensure that the syllabus more accurately reflects the ANC Plan’s community health and primary health care objectives. The thesis asserts that such an outcome (of direct political manipulation of the curriculum) is not inevitable, and can be avoided through a process of internally initiated change. It presents the findings of an interpretive case study into how the Rhodes University Community Experience Programme (CEP) influenced final year pharmacy students’ perceptions of the role of the pharmacist. The students’ comments were collected by means of focus group interviews, participant observation and documentary analysis. Whilst the CEP did not successfully transform their concept of the pharmacist’s role, it did succeed in influencing students’ understanding of the notions of community pharmacy and primary health care in line with the government interest group’s health objectives. This thesis concludes that internally initiated change within the pharmacy education system, would be preferable to that imposed through external political manipulation, as such change would be more likely to preserve the independent professional interests of pharmacy academics.
- Full Text:
- Date Issued: 2006
Discursive space in the discourse of a woman school leader
- Authors: Thawley, Sarah
- Date: 2006
- Subjects: Educational leadership -- Namibia Women school administrators -- Namibia School management and organization -- Namibia Discourse analysis
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1498 , http://hdl.handle.net/10962/d1003380
- Description: Women in leadership has become an increasingly popular area of research within the field of Educational Leadership and Management. As women hold more leadership roles and responsibilities in education it is increasingly important this subject is researched to enrich our understanding and knowledge of an area in which there have been silences. This research is a case study of a woman school leader in Namibia. The purpose was to explore the language she used and the impact of the discourses emerging from the text. The discourses are explained, described and interpreted through a critical discourse analysis to examine the discursive space and its relationship to the organisation. A feminist post-structural framework provided the basis for the critical orientation of this research. The findings of this study indicate that the leader occupied a discursive space of multiple positions that perpetuated and reproduced the school’s organizational structure and culture. The significance of this study lies in the possibilities for future research. The use of a poststructural framework to critically analyze discourses, combined with the use of leadership and management theory provided a means by which to explore and understand the multiple positions a woman leader takes up. By analyzing the discursive space in a discourse researchers are able to explore new ways of examining women and leadership in education.
- Full Text:
- Date Issued: 2006
- Authors: Thawley, Sarah
- Date: 2006
- Subjects: Educational leadership -- Namibia Women school administrators -- Namibia School management and organization -- Namibia Discourse analysis
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1498 , http://hdl.handle.net/10962/d1003380
- Description: Women in leadership has become an increasingly popular area of research within the field of Educational Leadership and Management. As women hold more leadership roles and responsibilities in education it is increasingly important this subject is researched to enrich our understanding and knowledge of an area in which there have been silences. This research is a case study of a woman school leader in Namibia. The purpose was to explore the language she used and the impact of the discourses emerging from the text. The discourses are explained, described and interpreted through a critical discourse analysis to examine the discursive space and its relationship to the organisation. A feminist post-structural framework provided the basis for the critical orientation of this research. The findings of this study indicate that the leader occupied a discursive space of multiple positions that perpetuated and reproduced the school’s organizational structure and culture. The significance of this study lies in the possibilities for future research. The use of a poststructural framework to critically analyze discourses, combined with the use of leadership and management theory provided a means by which to explore and understand the multiple positions a woman leader takes up. By analyzing the discursive space in a discourse researchers are able to explore new ways of examining women and leadership in education.
- Full Text:
- Date Issued: 2006
Ameliorating poverty in South Africa through natural resource commercialisation : how can the private sector make a difference?
- Authors: Shackleton, Sheona E
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6616 , http://hdl.handle.net/10962/d1016223
- Description: [From Introduction] Some of the poorest rural people in South Africa are using traditional skills to convert a variety of wild resources into commodities that are sold in the market place. Wood and woven craft, medicines, fresh and processed wild foods, alcoholic beverages, building materials, fuelwood, dried mopane worms, cultural artefacts and brooms are just some examples of the array of natural resource products increasingly seen for sale in local and external markets. The majority of participants in this trade have minimal education, few assets to draw on, and little access to alternative sources of income or jobs. A significant proportion are women, with more than half heading their own households. Many come from households devastated by HIV/AIDS. The cash earned from selling natural resource products, however modest, is of critical importance, preventing producers and their households from slipping deeper into poverty. “Since I have been making brooms my children no longer go to bed crying of hunger,” observed one broom producer. Research across the country has revealed that the private sector can play an important role in making some of the poorest people in our society a little less poor by assisting producers overcome some of the obstacles they face. Two main areas for private sector involvement were identified: securing raw material access and product marketing. , This policy brief is based on the original brief made available for a workshop in August 2006. It draws on, amongst other sources, the results of several case studies of natural resource commercialisation undertaken across South Africa. The project was funded by the South Africa-Netherlands Programme on Alternatives in Development (SANPAD), BP South Africa and the National Research Foundation (NRF). The Center for International Forestry Research, with support from SIDA, provided the funding to share these findings with key stakeholders including government policy and decision makers.
- Full Text:
- Date Issued: 2009
- Authors: Shackleton, Sheona E
- Date: 2009
- Language: English
- Type: Article
- Identifier: vital:6616 , http://hdl.handle.net/10962/d1016223
- Description: [From Introduction] Some of the poorest rural people in South Africa are using traditional skills to convert a variety of wild resources into commodities that are sold in the market place. Wood and woven craft, medicines, fresh and processed wild foods, alcoholic beverages, building materials, fuelwood, dried mopane worms, cultural artefacts and brooms are just some examples of the array of natural resource products increasingly seen for sale in local and external markets. The majority of participants in this trade have minimal education, few assets to draw on, and little access to alternative sources of income or jobs. A significant proportion are women, with more than half heading their own households. Many come from households devastated by HIV/AIDS. The cash earned from selling natural resource products, however modest, is of critical importance, preventing producers and their households from slipping deeper into poverty. “Since I have been making brooms my children no longer go to bed crying of hunger,” observed one broom producer. Research across the country has revealed that the private sector can play an important role in making some of the poorest people in our society a little less poor by assisting producers overcome some of the obstacles they face. Two main areas for private sector involvement were identified: securing raw material access and product marketing. , This policy brief is based on the original brief made available for a workshop in August 2006. It draws on, amongst other sources, the results of several case studies of natural resource commercialisation undertaken across South Africa. The project was funded by the South Africa-Netherlands Programme on Alternatives in Development (SANPAD), BP South Africa and the National Research Foundation (NRF). The Center for International Forestry Research, with support from SIDA, provided the funding to share these findings with key stakeholders including government policy and decision makers.
- Full Text:
- Date Issued: 2009
Ionospheric total electron content variability and its influence in radio astronomy
- Authors: Botai, Ondego Joel
- Date: 2006
- Subjects: Electrons , Global Positioning System , Global Positioning System -- Data processing , Ionosphere , Ionospheric radio wave propagation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5473 , http://hdl.handle.net/10962/d1005258 , Electrons , Global Positioning System , Global Positioning System -- Data processing , Ionosphere , Ionospheric radio wave propagation
- Description: Ionospheric phase delays of radio signals from Global Positioning System (GPS) satellites have been used to compute ionospheric Total Electron Content (TEC). An extended Chapman profle model is used to estimate the electron density profles and TEC. The Chapman profle that can be used to predict TEC over the mid-latitudes only applies during day time. To model night time TEC variability, a polynomial function is fitted to the night time peak electron density profles derived from the online International Reference Ionosphere (IRI) 2001. The observed and predicted TEC and its variability have been used to study ionospheric in°uence on Radio Astronomy in South Africa region. Di®erential phase delays of the radio signals from Radio Astronomy sources have been simulated using TEC. Using the simulated phase delays, the azimuth and declination o®sets of the radio sources have been estimated. Results indicate that, pointing errors of the order of miliarcseconds (mas) are likely if the ionospheric phase delays are not corrected for. These delays are not uniform and vary over a broad spectrum of timescales. This implies that fast frequency (referencing) switching, closure phases and fringe ¯tting schemes for ionospheric correction in astrometry are not the best option as they do not capture the real state of the ionosphere especially if the switching time is greater than the ionospheric TEC variability. However, advantage can be taken of the GPS satellite data available at intervals of a second from the GPS receiver network in South Africa to derive parameters which could be used to correct for the ionospheric delays. Furthermore GPS data can also be used to monitor the occurrence of scintillations, (which might corrupt radio signals) especially for the proposed, Square Kilometer Array (SKA) stations closer to the equatorial belt during magnetic storms and sub-storms. A 10 minute snapshot of GPS data recorded with the Hermanus [34:420 S, 19:220 E ] dual frequency receiver on 2003-04-11 did not show the occurrence of scintillations. This time scale is however too short and cannot be representative. Longer time scales; hours, days, seasons are needed to monitor the occurrence of scintillations.
- Full Text:
- Date Issued: 2006
- Authors: Botai, Ondego Joel
- Date: 2006
- Subjects: Electrons , Global Positioning System , Global Positioning System -- Data processing , Ionosphere , Ionospheric radio wave propagation
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5473 , http://hdl.handle.net/10962/d1005258 , Electrons , Global Positioning System , Global Positioning System -- Data processing , Ionosphere , Ionospheric radio wave propagation
- Description: Ionospheric phase delays of radio signals from Global Positioning System (GPS) satellites have been used to compute ionospheric Total Electron Content (TEC). An extended Chapman profle model is used to estimate the electron density profles and TEC. The Chapman profle that can be used to predict TEC over the mid-latitudes only applies during day time. To model night time TEC variability, a polynomial function is fitted to the night time peak electron density profles derived from the online International Reference Ionosphere (IRI) 2001. The observed and predicted TEC and its variability have been used to study ionospheric in°uence on Radio Astronomy in South Africa region. Di®erential phase delays of the radio signals from Radio Astronomy sources have been simulated using TEC. Using the simulated phase delays, the azimuth and declination o®sets of the radio sources have been estimated. Results indicate that, pointing errors of the order of miliarcseconds (mas) are likely if the ionospheric phase delays are not corrected for. These delays are not uniform and vary over a broad spectrum of timescales. This implies that fast frequency (referencing) switching, closure phases and fringe ¯tting schemes for ionospheric correction in astrometry are not the best option as they do not capture the real state of the ionosphere especially if the switching time is greater than the ionospheric TEC variability. However, advantage can be taken of the GPS satellite data available at intervals of a second from the GPS receiver network in South Africa to derive parameters which could be used to correct for the ionospheric delays. Furthermore GPS data can also be used to monitor the occurrence of scintillations, (which might corrupt radio signals) especially for the proposed, Square Kilometer Array (SKA) stations closer to the equatorial belt during magnetic storms and sub-storms. A 10 minute snapshot of GPS data recorded with the Hermanus [34:420 S, 19:220 E ] dual frequency receiver on 2003-04-11 did not show the occurrence of scintillations. This time scale is however too short and cannot be representative. Longer time scales; hours, days, seasons are needed to monitor the occurrence of scintillations.
- Full Text:
- Date Issued: 2006
Cross-cultural differences in IQ test performance: extension of an existing normative database on WAIS-III test performance
- Authors: Gaylard, Emma K
- Date: 2006
- Subjects: Wechsler Adult Intelligence Scale , Wechsler Adult Intelligence Scale -- South Africa , Black people -- Education , Black people -- Social conditions , Intelligence tests -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2979 , http://hdl.handle.net/10962/d1002488 , Wechsler Adult Intelligence Scale , Wechsler Adult Intelligence Scale -- South Africa , Black people -- Education , Black people -- Social conditions , Intelligence tests -- South Africa
- Description: Prior research (Shuttleworth-Edwards et al., 2004) presented preliminary normative data for the Wechsler Adult Intelligence Scale – III (WAIS-III) for Southern Africa, stratified according to gender (female vs. male), language (black African vs. white English), level of education (matric/12+ years of education vs. Graduate/15+ years of education) and quality of education (disadvantaged – Department of Education and Training vs. advantaged - Private/Model C). IQ scores for black African language and white English Southern Africans were comparable with the United States of America (USA) standardization when level and quality of education were equitable. (‘White English’ is the term used to denote those of European descent whose first language is English). A limitation of the research was the lack of control for language for most of the black groups and particularly in the Private/Model C Graduate group, where sixty percent of the participants originated from Zimbabwe. These represented a particularly elite group whose education was equitable to that of the white participants throughout their education (i.e. at primary, secondary and tertiary level). In order to rectify the lack of homogeneity of language, all non- Xhosa first language participants were excluded from the black sample and sixteen additional Xhosa first language participants were tested on the WAIS-III. Data analyses found no significant differences between the original and new groups, except in the comparison between Mixed African language Private/Model C Graduates and the Xhosa first language Private/Model C Graduate/15+ years of education, where there was a lowering of WAIS-III subtest, index and IQ scores in the newly constituted group. This lowering in test performance is explained in that the new Xhosa first language 15+ years of education group was a less advantaged group than the original Mixed African Language Private/Model C Graduate group, as the new group generally had less advantaged primary school education and had generally studied less at a tertiary level. Overall, these results demonstrate an incremental increase in WAIS-III test performance for sample groups on a continuum of quality of education from least to most advantaged education. This was true for both verbal and non-verbal subtests.
- Full Text:
- Date Issued: 2006
- Authors: Gaylard, Emma K
- Date: 2006
- Subjects: Wechsler Adult Intelligence Scale , Wechsler Adult Intelligence Scale -- South Africa , Black people -- Education , Black people -- Social conditions , Intelligence tests -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2979 , http://hdl.handle.net/10962/d1002488 , Wechsler Adult Intelligence Scale , Wechsler Adult Intelligence Scale -- South Africa , Black people -- Education , Black people -- Social conditions , Intelligence tests -- South Africa
- Description: Prior research (Shuttleworth-Edwards et al., 2004) presented preliminary normative data for the Wechsler Adult Intelligence Scale – III (WAIS-III) for Southern Africa, stratified according to gender (female vs. male), language (black African vs. white English), level of education (matric/12+ years of education vs. Graduate/15+ years of education) and quality of education (disadvantaged – Department of Education and Training vs. advantaged - Private/Model C). IQ scores for black African language and white English Southern Africans were comparable with the United States of America (USA) standardization when level and quality of education were equitable. (‘White English’ is the term used to denote those of European descent whose first language is English). A limitation of the research was the lack of control for language for most of the black groups and particularly in the Private/Model C Graduate group, where sixty percent of the participants originated from Zimbabwe. These represented a particularly elite group whose education was equitable to that of the white participants throughout their education (i.e. at primary, secondary and tertiary level). In order to rectify the lack of homogeneity of language, all non- Xhosa first language participants were excluded from the black sample and sixteen additional Xhosa first language participants were tested on the WAIS-III. Data analyses found no significant differences between the original and new groups, except in the comparison between Mixed African language Private/Model C Graduates and the Xhosa first language Private/Model C Graduate/15+ years of education, where there was a lowering of WAIS-III subtest, index and IQ scores in the newly constituted group. This lowering in test performance is explained in that the new Xhosa first language 15+ years of education group was a less advantaged group than the original Mixed African Language Private/Model C Graduate group, as the new group generally had less advantaged primary school education and had generally studied less at a tertiary level. Overall, these results demonstrate an incremental increase in WAIS-III test performance for sample groups on a continuum of quality of education from least to most advantaged education. This was true for both verbal and non-verbal subtests.
- Full Text:
- Date Issued: 2006
The puzzle of domination in society : seeking solutions in the African context
- Authors: Madonko, Thokozile
- Date: 2006
- Subjects: Rosen, Michael. On voluntary servitude , Fanon, Frantz, 1925-1961 , Fanon, Frantz, 1925-1961 -- Political and social views , Biko, Steve, 1946-1977 , Ideology , Black people -- Race identity , Ideology -- Psychological aspects , Ideology -- Sociological aspects , Power (Social sciences) , Consciousness , Racism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2855 , http://hdl.handle.net/10962/d1007260 , Rosen, Michael. On voluntary servitude , Fanon, Frantz, 1925-1961 , Fanon, Frantz, 1925-1961 -- Political and social views , Biko, Steve, 1946-1977 , Ideology , Black people -- Race identity , Ideology -- Psychological aspects , Ideology -- Sociological aspects , Power (Social sciences) , Consciousness , Racism
- Description: The presence of human destitution, impoverishment and degradation in the midst of plenty has puzzled social thinkers for millennia. One of the oldest and grandest of theories: the theory of ideology attempts to provide an answer to the puzzle of domination in society. Michael Rosen, in his book On Voluntary Servitude (1996), argues that the solution provided by the theory of ideology is problematic. Furthermore, on the basis of his critique, Rosen argues that we should abandon the theory of ideology and consider alternatives to it. Even though many contemporary academics have turned away from the theory of ideology, because they view it as an imprisoning meta-theory, this study explores the possibility of there being a meta-theory that could help us to make sense of the world. Through an examination of Rosen's critique this thesis shows that Rosen is too quick in his dismissal of the theory of ideology because he fails to consider that a revised functionalist theory of ideology can be expanded to account for the mechanism(s) that ensure that, over time, the society in question acquires ideological consciousness to further its welfare. This thesis shows that Rosen is correct in his criticism of the theory of ideology's explanation of domination because the content, history and social effects of ideological consciousness cannot be fully explained in terms of their role in promoting or stabilising relations of domination. In light of Rosen's criticism the thesis shows that if one provides both an explanation of the psychological motivations of individuals and of the nature of the oppressive society in which they find themselves then what I call an integrated theory of ideology can be developed. In order to illustrate the importance of an integrated theory of ideology the study moves away from high-level theoretical abstraction to concrete social analyses, focusing on the work of Frantz Fanon and Steve Biko and their explanations of domination. The reason this study focuses on their work is because in their role as social scientists, Fanon and Biko provided a powerful critique of colonial, post-colonial and neo-colonial society. It will be argued that Fanon and Biko were able to provide a lasting critique of colonial reality because they offered their critique within the framework of such an integrated theory. Consequently, this study argues that, as Fanon and Biko's work illustrate, an integrated theory of ideology qua critical theory ought not to be abandoned because it is crucial for understanding and resisting forms of oppression that exist in the world today.
- Full Text:
- Date Issued: 2006
- Authors: Madonko, Thokozile
- Date: 2006
- Subjects: Rosen, Michael. On voluntary servitude , Fanon, Frantz, 1925-1961 , Fanon, Frantz, 1925-1961 -- Political and social views , Biko, Steve, 1946-1977 , Ideology , Black people -- Race identity , Ideology -- Psychological aspects , Ideology -- Sociological aspects , Power (Social sciences) , Consciousness , Racism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2855 , http://hdl.handle.net/10962/d1007260 , Rosen, Michael. On voluntary servitude , Fanon, Frantz, 1925-1961 , Fanon, Frantz, 1925-1961 -- Political and social views , Biko, Steve, 1946-1977 , Ideology , Black people -- Race identity , Ideology -- Psychological aspects , Ideology -- Sociological aspects , Power (Social sciences) , Consciousness , Racism
- Description: The presence of human destitution, impoverishment and degradation in the midst of plenty has puzzled social thinkers for millennia. One of the oldest and grandest of theories: the theory of ideology attempts to provide an answer to the puzzle of domination in society. Michael Rosen, in his book On Voluntary Servitude (1996), argues that the solution provided by the theory of ideology is problematic. Furthermore, on the basis of his critique, Rosen argues that we should abandon the theory of ideology and consider alternatives to it. Even though many contemporary academics have turned away from the theory of ideology, because they view it as an imprisoning meta-theory, this study explores the possibility of there being a meta-theory that could help us to make sense of the world. Through an examination of Rosen's critique this thesis shows that Rosen is too quick in his dismissal of the theory of ideology because he fails to consider that a revised functionalist theory of ideology can be expanded to account for the mechanism(s) that ensure that, over time, the society in question acquires ideological consciousness to further its welfare. This thesis shows that Rosen is correct in his criticism of the theory of ideology's explanation of domination because the content, history and social effects of ideological consciousness cannot be fully explained in terms of their role in promoting or stabilising relations of domination. In light of Rosen's criticism the thesis shows that if one provides both an explanation of the psychological motivations of individuals and of the nature of the oppressive society in which they find themselves then what I call an integrated theory of ideology can be developed. In order to illustrate the importance of an integrated theory of ideology the study moves away from high-level theoretical abstraction to concrete social analyses, focusing on the work of Frantz Fanon and Steve Biko and their explanations of domination. The reason this study focuses on their work is because in their role as social scientists, Fanon and Biko provided a powerful critique of colonial, post-colonial and neo-colonial society. It will be argued that Fanon and Biko were able to provide a lasting critique of colonial reality because they offered their critique within the framework of such an integrated theory. Consequently, this study argues that, as Fanon and Biko's work illustrate, an integrated theory of ideology qua critical theory ought not to be abandoned because it is crucial for understanding and resisting forms of oppression that exist in the world today.
- Full Text:
- Date Issued: 2006
Application of CE, HPLC and LC-MS-MS for the analysis and quality control of Ginkgo biloba dosage forms
- Authors: Dubber, Mary-Jean
- Date: 2006
- Subjects: Pharmaceutical chemistry -- Quality control Ginkgo Micelles Capillary electrophoresis High performance liquid chromatography Drugs -- Dosage forms Flavonoids Terpenes Herbals
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3757 , http://hdl.handle.net/10962/d1003235
- Description: Natural products are complex mixtures of compounds with therapeutic effects which are often reported to be due to the synergistic action of multiple and sometimes unknown components. Consequently, standardization of these products is complex and a lack of effective quality control (QC) criteria in most countries has led to marketing of commercial products with questionable quality, safety and efficacy (QSE). The aim of this study was therefore to develop qualitative and quantitative analytical methods for use in the QC of Ginkgo biloba solid oral dosage forms. Initially, a micellar electrokinetic chromatography (MEKC) method was developed for the identification of the flavonol glycosides, rutin and quercitrin as well as 3 flavonol aglycones, quercetin, kaempferol and isorhamnetin in crude extracts of 4 Ginkgo biloba solid oral dosage forms using ultraviolet (UV) detection. A reversed-flow cyclodextrin-modified MEKC method was subsequently developed for the simultaneous determination of the aforementioned flavonols as well as ginkgolide A, B, C, J and bilobalide (all positive markers) in Ginkgo commercial products. A non-aqueous capillary electrophoresis (CE) method was also developed for fingerprinting the presence of ginkgolic acids (negative markers) in Ginkgo biloba leaf extracts, which are purported to be associated with toxic properties. This method was also applied to 2 Ginkgo biloba commercial products. Since the flavonols have strong UV absorbing chromophores, a reversed phase high-performance liquid chromatographic (RP-HPLC) method was developed and validated using photo-diode-array (PDA) detection which was then successfully applied to fingerprint commercially available Ginkgo biloba solid oral dosage forms as well as quantify the relevant flavonol markers present in these extracts. Sample preparation was simple, rapid and cost efficient with minimal clean-up and the employment of a minibore column which requires low mobile phase flow rates contributed to the economy of the method. Unlike the conventional QC approach, samples were not hydrolyzed and direct determination of 2 intact flavonol glycosides, together with the usual aglycone markers was facilitated which provided maximal content information for fingerprint comparisons. On the other hand, terpene trilactones possess poor chromophores and an alternative detection method to UV was required in order to obtain suitable sensitivity. RP-HPLC with evaporative light scattering detection (ELSD) was selected for quantification of these non-volatile constituents in Ginkgo dosage forms and this method was deemed suitable for the routine QC analysis of these positive markers in commercial products. Since approximately 33 flavonoids have been identified in Ginkgo biloba leaf extracts, baseline separation using UV/PDA detection normally requires complex gradient programs and long analysis times. In addition, unequivocal identification of the flavonoids with similar UV spectra and elution times cannot be guaranteed. A liquid chromatographic tandem mass spectrometric (LC-MS-MS) method was therefore developed and validated in order to ensure accurate quantification of the selected flavonol marker compounds in Ginkgo commercial products. LC-MS-MS analysis of Ginkgo extracts revealed, in addition to rutin, the possible presence of other quercetin analogues, quercetin-3-Orhamnoside-7-O-glucoside or quercetin-3-O-glucoside-7-O-rhamnoside, previously unreported in Ginkgo biloba leaf extracts or dosage forms. In terms of evaluating the most suitable analytical method for QC, CE shows exceptional potential in the future analysis of Ginkgo biloba dosage forms while HPLC-PDA and HPLC-ELSD are currently the most affordable and practical instruments for the routine analysis of the flavonols and terpenoids, respectively. LC-MS-MS proved to be pivotal for the accurate identification and quantification of the flavonols due to interference by other flavonoid compounds with similar retention times and UV spectra to the peaks of interest. All quantitative and qualitative results revealed large discrepancies in the marker content between the products regardless of which batch was analysed and product labels disclosed little relevant information. Although currently not required by most regulatory agencies, some of the usual quality criteria applied to orthodox medicines was evaluated. In particular, dissolution analysis, disintegration, tablet hardness and weight uniformity were assessed and revealed similar inconsistencies. This thesis emphasises that implementation of effective QC criteria is long overdue and is essential to ensure consistent product QSE of commercially available Ginkgo biloba solid oral dosage forms.
- Full Text:
- Date Issued: 2006
- Authors: Dubber, Mary-Jean
- Date: 2006
- Subjects: Pharmaceutical chemistry -- Quality control Ginkgo Micelles Capillary electrophoresis High performance liquid chromatography Drugs -- Dosage forms Flavonoids Terpenes Herbals
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3757 , http://hdl.handle.net/10962/d1003235
- Description: Natural products are complex mixtures of compounds with therapeutic effects which are often reported to be due to the synergistic action of multiple and sometimes unknown components. Consequently, standardization of these products is complex and a lack of effective quality control (QC) criteria in most countries has led to marketing of commercial products with questionable quality, safety and efficacy (QSE). The aim of this study was therefore to develop qualitative and quantitative analytical methods for use in the QC of Ginkgo biloba solid oral dosage forms. Initially, a micellar electrokinetic chromatography (MEKC) method was developed for the identification of the flavonol glycosides, rutin and quercitrin as well as 3 flavonol aglycones, quercetin, kaempferol and isorhamnetin in crude extracts of 4 Ginkgo biloba solid oral dosage forms using ultraviolet (UV) detection. A reversed-flow cyclodextrin-modified MEKC method was subsequently developed for the simultaneous determination of the aforementioned flavonols as well as ginkgolide A, B, C, J and bilobalide (all positive markers) in Ginkgo commercial products. A non-aqueous capillary electrophoresis (CE) method was also developed for fingerprinting the presence of ginkgolic acids (negative markers) in Ginkgo biloba leaf extracts, which are purported to be associated with toxic properties. This method was also applied to 2 Ginkgo biloba commercial products. Since the flavonols have strong UV absorbing chromophores, a reversed phase high-performance liquid chromatographic (RP-HPLC) method was developed and validated using photo-diode-array (PDA) detection which was then successfully applied to fingerprint commercially available Ginkgo biloba solid oral dosage forms as well as quantify the relevant flavonol markers present in these extracts. Sample preparation was simple, rapid and cost efficient with minimal clean-up and the employment of a minibore column which requires low mobile phase flow rates contributed to the economy of the method. Unlike the conventional QC approach, samples were not hydrolyzed and direct determination of 2 intact flavonol glycosides, together with the usual aglycone markers was facilitated which provided maximal content information for fingerprint comparisons. On the other hand, terpene trilactones possess poor chromophores and an alternative detection method to UV was required in order to obtain suitable sensitivity. RP-HPLC with evaporative light scattering detection (ELSD) was selected for quantification of these non-volatile constituents in Ginkgo dosage forms and this method was deemed suitable for the routine QC analysis of these positive markers in commercial products. Since approximately 33 flavonoids have been identified in Ginkgo biloba leaf extracts, baseline separation using UV/PDA detection normally requires complex gradient programs and long analysis times. In addition, unequivocal identification of the flavonoids with similar UV spectra and elution times cannot be guaranteed. A liquid chromatographic tandem mass spectrometric (LC-MS-MS) method was therefore developed and validated in order to ensure accurate quantification of the selected flavonol marker compounds in Ginkgo commercial products. LC-MS-MS analysis of Ginkgo extracts revealed, in addition to rutin, the possible presence of other quercetin analogues, quercetin-3-Orhamnoside-7-O-glucoside or quercetin-3-O-glucoside-7-O-rhamnoside, previously unreported in Ginkgo biloba leaf extracts or dosage forms. In terms of evaluating the most suitable analytical method for QC, CE shows exceptional potential in the future analysis of Ginkgo biloba dosage forms while HPLC-PDA and HPLC-ELSD are currently the most affordable and practical instruments for the routine analysis of the flavonols and terpenoids, respectively. LC-MS-MS proved to be pivotal for the accurate identification and quantification of the flavonols due to interference by other flavonoid compounds with similar retention times and UV spectra to the peaks of interest. All quantitative and qualitative results revealed large discrepancies in the marker content between the products regardless of which batch was analysed and product labels disclosed little relevant information. Although currently not required by most regulatory agencies, some of the usual quality criteria applied to orthodox medicines was evaluated. In particular, dissolution analysis, disintegration, tablet hardness and weight uniformity were assessed and revealed similar inconsistencies. This thesis emphasises that implementation of effective QC criteria is long overdue and is essential to ensure consistent product QSE of commercially available Ginkgo biloba solid oral dosage forms.
- Full Text:
- Date Issued: 2006
Stakeholders' perceptions of the cluster system in a secondary school in Rundu, Namibia
- Authors: Topnaar, P E
- Date: 2006
- Subjects: School management and organization -- Namibia -- Rundu Education -- Namibia -- Rundu Educational leadership -- Namibia -- Rundu Educational change -- Namibia -- Rundu
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1853 , http://hdl.handle.net/10962/d1004516
- Description: Since independence in 1990, various efforts have been made to improve the quality and management of Namibian schools, including the Basic Education Project (BEP-Project). In collaboration with the Geselschaft fur Technische Zusammenarbeit (GTZ), the BEP-Project has supported the implementation of important Government programs, such as Lower Primary reform and the cluster system. In 1995 the BEP-Project began to address educational needs in the Rundu education region. It was believed that Rundu had in the past been the most neglected region, especially with regard to education. The school cluster system was devised to facilitate new ways of education service delivery and to address the question of improving education standards. The purpose of this research is to answer the question: "How do the management and staff of a secondary school in the Rundu region of education experience a school cluster system?" To this end, the research seeks to determine what potential the cluster system holds and how that may be realised, and to also establish whether there is any evidence of change in management practices. A case study method has been employed to gain insight into the cluster system as a management tool. Ten respondents, all of whom have been employed at the school in question for a considerable period of time, were interviewed before and after the implementation of the cluster system. The research disclosed that disparities and tension in the school were legacies of the colonial education system, but that the cluster system had bridged the gap and enhanced uniformity and cooperation. Sharing of ideas on educational issues and constant interaction created a conducive environment for academic performance. The case study further disclosed that parental involvement in decision making is still a course for concern and that the cluster system has not yet addressed this issue. The study has shown that decentralisation has taken place and that rural schools are no longer operating in isolation. A lack of innovative ideas has hampered training as a cluster activity. From the research, it is evident that schools have previously operated on an individual basis, but that the cluster system has created the opportunity for schools to interact on a regular basis. This study is timely and of national importance. I anticipate that this study will be of use to policy makers in making decisions for the future development of the cluster system.
- Full Text:
- Date Issued: 2006
- Authors: Topnaar, P E
- Date: 2006
- Subjects: School management and organization -- Namibia -- Rundu Education -- Namibia -- Rundu Educational leadership -- Namibia -- Rundu Educational change -- Namibia -- Rundu
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1853 , http://hdl.handle.net/10962/d1004516
- Description: Since independence in 1990, various efforts have been made to improve the quality and management of Namibian schools, including the Basic Education Project (BEP-Project). In collaboration with the Geselschaft fur Technische Zusammenarbeit (GTZ), the BEP-Project has supported the implementation of important Government programs, such as Lower Primary reform and the cluster system. In 1995 the BEP-Project began to address educational needs in the Rundu education region. It was believed that Rundu had in the past been the most neglected region, especially with regard to education. The school cluster system was devised to facilitate new ways of education service delivery and to address the question of improving education standards. The purpose of this research is to answer the question: "How do the management and staff of a secondary school in the Rundu region of education experience a school cluster system?" To this end, the research seeks to determine what potential the cluster system holds and how that may be realised, and to also establish whether there is any evidence of change in management practices. A case study method has been employed to gain insight into the cluster system as a management tool. Ten respondents, all of whom have been employed at the school in question for a considerable period of time, were interviewed before and after the implementation of the cluster system. The research disclosed that disparities and tension in the school were legacies of the colonial education system, but that the cluster system had bridged the gap and enhanced uniformity and cooperation. Sharing of ideas on educational issues and constant interaction created a conducive environment for academic performance. The case study further disclosed that parental involvement in decision making is still a course for concern and that the cluster system has not yet addressed this issue. The study has shown that decentralisation has taken place and that rural schools are no longer operating in isolation. A lack of innovative ideas has hampered training as a cluster activity. From the research, it is evident that schools have previously operated on an individual basis, but that the cluster system has created the opportunity for schools to interact on a regular basis. This study is timely and of national importance. I anticipate that this study will be of use to policy makers in making decisions for the future development of the cluster system.
- Full Text:
- Date Issued: 2006
The ichthyofauna in a small temporarily open/closed Eastern Cape estuary, South Africa
- Authors: Lukey, James Robert
- Date: 2006
- Subjects: Estuarine fishes -- South Africa -- Eastern Cape , Marine fishes -- South Africa -- Eastern Cape , Estuaries -- South Africa -- Eastern Cape , Estuarine fishes -- Habitat -- South Africa -- Eastern Cape , Fish populations -- South Africa -- Eastern Cape , Fishes -- Growth -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5287 , http://hdl.handle.net/10962/d1005131 , Estuarine fishes -- South Africa -- Eastern Cape , Marine fishes -- South Africa -- Eastern Cape , Estuaries -- South Africa -- Eastern Cape , Estuarine fishes -- Habitat -- South Africa -- Eastern Cape , Fish populations -- South Africa -- Eastern Cape , Fishes -- Growth -- South Africa -- Eastern Cape
- Description: The ichthyofaunal community structure, population dynamics and movement patterns in the small temporarily open/closed (TOCE) Grant’s Valley estuary, situated along the Eastern Cape coastline, were investigated over the period May 2004 to April 2005. Community structure in the littoral zone was assessed, while growth of selected ichthyofaunal species was investigated using the MULTIFAN model. Population size was assessed using mark recapture models and movement within the estuary using the Hilborn (1990) model. Total ichthyofaunal densities and biomass within the littoral zone ranged between 0.31 to 21.45 fish m⁻² and 0.20 to 4.67 g wwt m⁻², with the highest values typically recorded during the summer. Results of the study indicated that the ichthyofaunal community structure within the estuary was closely linked to the mouth phase and the establishment of a link to the marine environment via overtopping events. In the absence of any link to the sea, the ichthyofaunal community was numerically dominated by estuarine resident species, mainly Gilchristella aestuaria and to a lesser extent, by the river goby, Glossogobius callidus which collectively comprised ca. 88% of all fish sampled. The establishment of the link to the marine environment contributed to an increased contribution of marine breeding species (e.g. Rhabdosargus holubi, Myxus capensis and Atherina breviceps) to the total ichthyofaunal abundances. In contrast, total ichthyofaunal biomass was almost always dominated by marine breeding species by virtue of their larger sizes. Results of hierarchical cluster analyses did not identify any spatial patterns in the ichthyofaunal community within the littoral zone. Results of MULTIFAN analysis indicated estuarine resident fish species bred over an extended period with peaks occurring in the summer months. Conversely, marine breeding fish were shown to recruit into the estuary following overtopping and breaching events. Results of the mark-recapture experiment indicated a population of ca. 12 000 (11 219 – 13 311) individuals greater than 50mm SL. Marine-breeding species (R. holubi, Monodactylus falciformis, and two mullet species) numerically dominated the ichthyofauna, possibly as a result of their effective use of overtopping events. The two mullet species, M. capensis and Liza richardsonii, and the Cape stumpnose, R. holubi moved extensively throughout the estuary, while the remaining species exhibited restricted movement patterns possibly due to the preference for refuge and foraging areas associated with reed beds. The observed movement patterns of individual fish species appeared to be associated with both foraging behaviour and habitat selection.
- Full Text:
- Date Issued: 2006
- Authors: Lukey, James Robert
- Date: 2006
- Subjects: Estuarine fishes -- South Africa -- Eastern Cape , Marine fishes -- South Africa -- Eastern Cape , Estuaries -- South Africa -- Eastern Cape , Estuarine fishes -- Habitat -- South Africa -- Eastern Cape , Fish populations -- South Africa -- Eastern Cape , Fishes -- Growth -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5287 , http://hdl.handle.net/10962/d1005131 , Estuarine fishes -- South Africa -- Eastern Cape , Marine fishes -- South Africa -- Eastern Cape , Estuaries -- South Africa -- Eastern Cape , Estuarine fishes -- Habitat -- South Africa -- Eastern Cape , Fish populations -- South Africa -- Eastern Cape , Fishes -- Growth -- South Africa -- Eastern Cape
- Description: The ichthyofaunal community structure, population dynamics and movement patterns in the small temporarily open/closed (TOCE) Grant’s Valley estuary, situated along the Eastern Cape coastline, were investigated over the period May 2004 to April 2005. Community structure in the littoral zone was assessed, while growth of selected ichthyofaunal species was investigated using the MULTIFAN model. Population size was assessed using mark recapture models and movement within the estuary using the Hilborn (1990) model. Total ichthyofaunal densities and biomass within the littoral zone ranged between 0.31 to 21.45 fish m⁻² and 0.20 to 4.67 g wwt m⁻², with the highest values typically recorded during the summer. Results of the study indicated that the ichthyofaunal community structure within the estuary was closely linked to the mouth phase and the establishment of a link to the marine environment via overtopping events. In the absence of any link to the sea, the ichthyofaunal community was numerically dominated by estuarine resident species, mainly Gilchristella aestuaria and to a lesser extent, by the river goby, Glossogobius callidus which collectively comprised ca. 88% of all fish sampled. The establishment of the link to the marine environment contributed to an increased contribution of marine breeding species (e.g. Rhabdosargus holubi, Myxus capensis and Atherina breviceps) to the total ichthyofaunal abundances. In contrast, total ichthyofaunal biomass was almost always dominated by marine breeding species by virtue of their larger sizes. Results of hierarchical cluster analyses did not identify any spatial patterns in the ichthyofaunal community within the littoral zone. Results of MULTIFAN analysis indicated estuarine resident fish species bred over an extended period with peaks occurring in the summer months. Conversely, marine breeding fish were shown to recruit into the estuary following overtopping and breaching events. Results of the mark-recapture experiment indicated a population of ca. 12 000 (11 219 – 13 311) individuals greater than 50mm SL. Marine-breeding species (R. holubi, Monodactylus falciformis, and two mullet species) numerically dominated the ichthyofauna, possibly as a result of their effective use of overtopping events. The two mullet species, M. capensis and Liza richardsonii, and the Cape stumpnose, R. holubi moved extensively throughout the estuary, while the remaining species exhibited restricted movement patterns possibly due to the preference for refuge and foraging areas associated with reed beds. The observed movement patterns of individual fish species appeared to be associated with both foraging behaviour and habitat selection.
- Full Text:
- Date Issued: 2006
Rhodes University Graduation Ceremony 2006
- Authors: Rhodes University
- Date: 2006
- Language: English
- Type: text
- Identifier: vital:8141 , http://hdl.handle.net/10962/d1007254
- Description: Rhodes University Graduation Ceremonies [at] 1820 Settlers National Monument Thursday, 6 April 2006 at 18.00 [and] Friday, 7 April 2006 at 10:30; 14:30 & 18:00 [and] Saturday, 8 April 2006 at 10:30 , Inauguration Ceremony [of] Dr Saleem Badat [as] Principal and Vice-Chancellor [at the] 1820 Settlers National Monument [on] Wednesday, 27 September 2006 at 18:15.
- Full Text:
- Date Issued: 2006
- Authors: Rhodes University
- Date: 2006
- Language: English
- Type: text
- Identifier: vital:8141 , http://hdl.handle.net/10962/d1007254
- Description: Rhodes University Graduation Ceremonies [at] 1820 Settlers National Monument Thursday, 6 April 2006 at 18.00 [and] Friday, 7 April 2006 at 10:30; 14:30 & 18:00 [and] Saturday, 8 April 2006 at 10:30 , Inauguration Ceremony [of] Dr Saleem Badat [as] Principal and Vice-Chancellor [at the] 1820 Settlers National Monument [on] Wednesday, 27 September 2006 at 18:15.
- Full Text:
- Date Issued: 2006
Foucault, historicism and political philosophy
- Allsobrook, Christopher John
- Authors: Allsobrook, Christopher John
- Date: 2006
- Subjects: Foucault, Michel, 1926-1984 Sartre, Jean Paul, 1905-1980 Political science -- Philosophy Power (Philosophy) Existential phenomenology Knowledge, Theory of History -- Philosophy Historicism
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:2726 , http://hdl.handle.net/10962/d1003073
- Description: This thesis defends an ontological and epistemological account of Michel Foucault's post-structuralist philosophy, to argue that political philosophy needs to take into account the historical and political contingency of subjectivity and discourse. I show that by addressing the historical and political contingency of knowledge, Foucault's work overcomes the flaw of foundational epistemology in political philosophy, which treats true discourse as universal and disinterested. In doing so I hope to have to refuted the mainly positivistic and humanist schools of thought that lay claim to universal and foundationalist notions, by demonstrating the extent to which their misgivings about Foucault's work are informed by and founded upon an unjustified a-historicism. The thesis is composed of three chapters, the first of which deals with an ontology of the subject, the second, with an ontology of social relations, and the last with epistemology. In each chapter I use dialectical analysis to reveal how interests necessarily mediate subjectivity, social relations, and knowledge. The first two chapters defend Foucault's conception of power, by way of an analysis of the relations between Foucault's work and Sartre's existential phenomenology. I show how both Foucault and Sartre successfully address the problem of historicism for political philosophy with their respective conceptions of human freedom. The final chapter defends Foucault's conception of the relations between power and discourse, to show how it overcomes the a-historicism of universal, foundational epistemology. These three chapters demonstrate the importance of accounting for historicism in political philosophy. Claims to universal interest, because knowledge is conditioned by conflicts of interest, often mask political domination. It is important, then, to remember, in political philosophy, that knowledge is evaluative and interested, reflecting historically and politically mediated evaluations. One should be suspicious of ' natural facts' , used to justify actions or beliefs, thereby masking the choices that inform them. I have used the work of Michel Foucault to motivate this claim.
- Full Text:
- Date Issued: 2006
- Authors: Allsobrook, Christopher John
- Date: 2006
- Subjects: Foucault, Michel, 1926-1984 Sartre, Jean Paul, 1905-1980 Political science -- Philosophy Power (Philosophy) Existential phenomenology Knowledge, Theory of History -- Philosophy Historicism
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:2726 , http://hdl.handle.net/10962/d1003073
- Description: This thesis defends an ontological and epistemological account of Michel Foucault's post-structuralist philosophy, to argue that political philosophy needs to take into account the historical and political contingency of subjectivity and discourse. I show that by addressing the historical and political contingency of knowledge, Foucault's work overcomes the flaw of foundational epistemology in political philosophy, which treats true discourse as universal and disinterested. In doing so I hope to have to refuted the mainly positivistic and humanist schools of thought that lay claim to universal and foundationalist notions, by demonstrating the extent to which their misgivings about Foucault's work are informed by and founded upon an unjustified a-historicism. The thesis is composed of three chapters, the first of which deals with an ontology of the subject, the second, with an ontology of social relations, and the last with epistemology. In each chapter I use dialectical analysis to reveal how interests necessarily mediate subjectivity, social relations, and knowledge. The first two chapters defend Foucault's conception of power, by way of an analysis of the relations between Foucault's work and Sartre's existential phenomenology. I show how both Foucault and Sartre successfully address the problem of historicism for political philosophy with their respective conceptions of human freedom. The final chapter defends Foucault's conception of the relations between power and discourse, to show how it overcomes the a-historicism of universal, foundational epistemology. These three chapters demonstrate the importance of accounting for historicism in political philosophy. Claims to universal interest, because knowledge is conditioned by conflicts of interest, often mask political domination. It is important, then, to remember, in political philosophy, that knowledge is evaluative and interested, reflecting historically and politically mediated evaluations. One should be suspicious of ' natural facts' , used to justify actions or beliefs, thereby masking the choices that inform them. I have used the work of Michel Foucault to motivate this claim.
- Full Text:
- Date Issued: 2006
An analysis of how Zimbabwean women negotiate the meaning of HIV/AIDS prevention television advertisements
- Authors: Hungwe, Caroline
- Date: 2006
- Subjects: Mass media and women -- Zimbabwe AIDS (Disease) in mass media -- Zimbabwe Mass media -- Audiences Women -- Zimbabwe -- Social conditions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3435 , http://hdl.handle.net/10962/d1002889
- Description: Within the context of debates concerning the impact of media on audiences, this study takes the form of a qualitative audience reception analysis; to investigate how a particular group of female audiences situated in Zimbabwe interprets televised HIV/AIDS prevention advertisements. It examines the extent to which the social context influences the audiences’ acceptance or rejection of preferred readings encoded in the texts. The study is situated within the broad theoretical and methodological framework of both the communication for development and the cultural studies approaches to the study of the media. Data for the investigation was collected through the focus group and in-depth interview methods as well as through the websites and organisational documents produced by the encoders of the advertisements. The findings indicate that the female audiences’ interpretative strategies were informed by their lived experience as well as pre-existing knowledge. Based on the findings it can be deduced that, contrary to earlier beliefs and media theories such as that of the “hypodermic needle” theory the audience of public communication is not a passive homogenous mass that easily succumbs to media influences, rather the audience is active in the production of meaning, but under determinate conditions in particular contexts. The texts, the producing institutions and the social history of the audiences supply these conditions.
- Full Text:
- Date Issued: 2006
- Authors: Hungwe, Caroline
- Date: 2006
- Subjects: Mass media and women -- Zimbabwe AIDS (Disease) in mass media -- Zimbabwe Mass media -- Audiences Women -- Zimbabwe -- Social conditions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3435 , http://hdl.handle.net/10962/d1002889
- Description: Within the context of debates concerning the impact of media on audiences, this study takes the form of a qualitative audience reception analysis; to investigate how a particular group of female audiences situated in Zimbabwe interprets televised HIV/AIDS prevention advertisements. It examines the extent to which the social context influences the audiences’ acceptance or rejection of preferred readings encoded in the texts. The study is situated within the broad theoretical and methodological framework of both the communication for development and the cultural studies approaches to the study of the media. Data for the investigation was collected through the focus group and in-depth interview methods as well as through the websites and organisational documents produced by the encoders of the advertisements. The findings indicate that the female audiences’ interpretative strategies were informed by their lived experience as well as pre-existing knowledge. Based on the findings it can be deduced that, contrary to earlier beliefs and media theories such as that of the “hypodermic needle” theory the audience of public communication is not a passive homogenous mass that easily succumbs to media influences, rather the audience is active in the production of meaning, but under determinate conditions in particular contexts. The texts, the producing institutions and the social history of the audiences supply these conditions.
- Full Text:
- Date Issued: 2006
Post-feminism in Cosmopolitan and For Him magazine (FHM) : a critical analysis
- Authors: Legge, Janet Helen
- Date: 2013-07-02
- Subjects: For Him Magazine (South Africa) Cosmopolitan (South Africa) Discourse analysis -- Social aspects Mass media and language Mass media criticism Women in mass media Sex role in mass media Women in popular culture Men in popular culture
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2375 , http://hdl.handle.net/10962/d1005956
- Description: Cosmopolitan and For Him Magazine (FHM) are, at present, both the most widely read and, therefore, the most popular "white" consumer magazines in South Africa. They both appeal to young audiences of between 18 and 34 years of age, approximately, and target middle-class, educated groups of readers. My interest in Cosmopolitan and FHM lies in their ability to influence and shape their readers' actions, values, identities and relationships, in particular with the other gender. My analysis is focused on the cover pages and the Editor's letters of six copies of each magazine, ranging from April to September 2003, providing me with a corpus of 12 cover pages and 12 Editor's letters. I adopt a critical perspective through the use of Fairclough's (1989) Critical Discourse Analysis, supported by Mills (1995) Feminist Stylistics, McLoughlin's (2000) textual analysis of cover pages and Kress & van Leeuwen's (1996) visual analysis tools. By combining these different methodologies my research falls into what is newly termed Feminist Critical Discourse Analysis (Lazar 2005). The cover page analyses used primarily McLoughlin and Kress & van Leeuwen and provides an element of pure genre analysis, while the analysis of the Editor's letters were subject to Fairclough's three inter-related stages of analysis, namely: a Description of the formal textual elements of the letters, an Interpretation which analyses the processes of text production and interpretation, and lastly an Explanation of the socio-historical context. Through an analysis of these magazines, whose interests are being served and how the readers are shaped and positioned by the magazines can be identified. My analyses revealed conflicting discourses within each magazine, however it was Cosmopolitan that revealed more tension and conflict in terms of identifying and representing women, while FHM subscribed, for the most part, uniformly to the "new lad" ideology. However, while Cosmopolitan attempted to show a forward-thinking and emancipatory view of the roles of men and women in society, both magazines covertly sustain patriarchal dominance and hegemonic masculinity. In conclusion, I reveal the need for consumers of the mass media to become more critically aware of the ideologies that are promoted through the differing tools of the media and that only through this critical awareness can any further movement towards equal relations between men and women be made. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Authors: Legge, Janet Helen
- Date: 2013-07-02
- Subjects: For Him Magazine (South Africa) Cosmopolitan (South Africa) Discourse analysis -- Social aspects Mass media and language Mass media criticism Women in mass media Sex role in mass media Women in popular culture Men in popular culture
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2375 , http://hdl.handle.net/10962/d1005956
- Description: Cosmopolitan and For Him Magazine (FHM) are, at present, both the most widely read and, therefore, the most popular "white" consumer magazines in South Africa. They both appeal to young audiences of between 18 and 34 years of age, approximately, and target middle-class, educated groups of readers. My interest in Cosmopolitan and FHM lies in their ability to influence and shape their readers' actions, values, identities and relationships, in particular with the other gender. My analysis is focused on the cover pages and the Editor's letters of six copies of each magazine, ranging from April to September 2003, providing me with a corpus of 12 cover pages and 12 Editor's letters. I adopt a critical perspective through the use of Fairclough's (1989) Critical Discourse Analysis, supported by Mills (1995) Feminist Stylistics, McLoughlin's (2000) textual analysis of cover pages and Kress & van Leeuwen's (1996) visual analysis tools. By combining these different methodologies my research falls into what is newly termed Feminist Critical Discourse Analysis (Lazar 2005). The cover page analyses used primarily McLoughlin and Kress & van Leeuwen and provides an element of pure genre analysis, while the analysis of the Editor's letters were subject to Fairclough's three inter-related stages of analysis, namely: a Description of the formal textual elements of the letters, an Interpretation which analyses the processes of text production and interpretation, and lastly an Explanation of the socio-historical context. Through an analysis of these magazines, whose interests are being served and how the readers are shaped and positioned by the magazines can be identified. My analyses revealed conflicting discourses within each magazine, however it was Cosmopolitan that revealed more tension and conflict in terms of identifying and representing women, while FHM subscribed, for the most part, uniformly to the "new lad" ideology. However, while Cosmopolitan attempted to show a forward-thinking and emancipatory view of the roles of men and women in society, both magazines covertly sustain patriarchal dominance and hegemonic masculinity. In conclusion, I reveal the need for consumers of the mass media to become more critically aware of the ideologies that are promoted through the differing tools of the media and that only through this critical awareness can any further movement towards equal relations between men and women be made. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
The development and assessment of a generic carbamazepine sustained release dosage form
- Authors: Patel, Fathima
- Date: 2006
- Subjects: Carbamazepine Pharmacokinetics Drugs -- Controlled release Drugs -- Dosage forms Tablets (Medicine) Drugs -- Administration
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3784 , http://hdl.handle.net/10962/d1003262
- Description: Carbamazepine (CBZ) is a first-line drug used for the treatment of partial and tonic-clonic seizures. It is also the drug of choice for use during pregnancy and recommended for the treatment of seizure disorders in children. CBZ possesses the ability to induce metabolism of drugs that are transformed in the liver and has the unique ability to induce its own metabolism by a phenomenon known as ‘auto- induction’, where its biological half-life is significantly reduced during chronic administration. Large doses of CBZ are often prescribed as daily divided doses and this often adversely affects patient compliance, with the result that therapy is ineffective. A sustained-release dosage form containing CBZ is currently marketed as Tegretol® CR and the development of a generic product would provide patients with an equivalent product with a similar dosing frequency, at a reduced cost. Therefore, the development of a polymer-based matrix tablet was undertaken to produce a sustained-release dosage form of CBZ, since these dosage forms are relatively simple and cheap to produce when compared to other, more sophisticated forms of sustained-release technology. Preformulation studies were conducted to assess moisture content of excipients and dosage forms and to identify possible incompatibilities between CBZ and potential formulation excipients. Furthermore, studies were conducted to assess the potential for polymorphic transitions to occur during manufacture. Stability testing was conducted to assess the behaviour of the dosage forms under storage conditions that the product may be exposed to. Dissolution testing was undertaken using USP Apparatus 3, which allowed for a more realistic assessment and prediction of in vivo drug release rates. Samples were analysed using a high performance liquid chromatographic method that was developed and validated for the determination of CBZ. Tablets were manufactured by wet granulation and direct compression techniques, and the resultant drug release profiles were evaluated statistically by means of the f1 and f2 difference and similarity factors. The f2 factor was incorporated as an assessment criterion in the design of an artificial neural network that was used to predict drug release profiles and formulation composition. A direct compression tablet formulation was successfully adapted from a prototype wet granulation matrix formulation and a number of formulation variables were assessed to establish their effect(s) on the dissolution rate profile of CBZ that resulted from testing of the dosage forms. The particle size grade of CBZ was also investigated and it was ascertained that fine particle size grade CBZ showed improved drug release profiles when compared to the coarse grade CBZ which was desirable, since CBZ is a highly water insoluble compound. Furthermore, the impact of the viscosity grade and proportion of rate-controlling polymer, viz., hydroxypropyl methylcellulose was also investigated for its effect on drug release rates. The lower viscosity grade was found to be more appropriate for use with CBZ. The type of anti-frictional agent used in the formulations did not appear to affect drug release from the polymeric matrix tablets, however specific compounds may have an effect on the physical characteristics of the polymeric tablets. The resultant formulations did not display zero-order drug release kinetics and a first-order mathematical model was developed to provide an additional resource for athematical analysis of dissolution profiles. An artificial neural network was designed, developed and applied to predict dissolution rate profiles for formulation. Furthermore, the network was used to predict formulation compositions that would produce drug release profiles comparable to the reference product, Tegretol® CR. The formulation composition predicted by the network to match the dissolution profile of the innovator product was manufactured and tested in vitro. The formulation was further manipulated, empirically, so as to match the in vitro dissolution rate profile of Tegretol® CR, more completely. The test tablets that were produced were tested in two health male volunteers using Tegretol® CR 400mg as the reference product. The batch used for this “proof of concept” biostudy was produced in accordance with cGMP guidelines and the protocol in accordance with ICH guidelines. The test matrix tablets revealed in vivo bioavailability profiles for CBZ, however, bioequivalence between the test and reference product could not be established. It can be concluded that the polymeric matrix CBZ tablets have the potential to be used as a twice-daily dosage form for the treatment of relevant seizure disorders.
- Full Text:
- Date Issued: 2006
- Authors: Patel, Fathima
- Date: 2006
- Subjects: Carbamazepine Pharmacokinetics Drugs -- Controlled release Drugs -- Dosage forms Tablets (Medicine) Drugs -- Administration
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3784 , http://hdl.handle.net/10962/d1003262
- Description: Carbamazepine (CBZ) is a first-line drug used for the treatment of partial and tonic-clonic seizures. It is also the drug of choice for use during pregnancy and recommended for the treatment of seizure disorders in children. CBZ possesses the ability to induce metabolism of drugs that are transformed in the liver and has the unique ability to induce its own metabolism by a phenomenon known as ‘auto- induction’, where its biological half-life is significantly reduced during chronic administration. Large doses of CBZ are often prescribed as daily divided doses and this often adversely affects patient compliance, with the result that therapy is ineffective. A sustained-release dosage form containing CBZ is currently marketed as Tegretol® CR and the development of a generic product would provide patients with an equivalent product with a similar dosing frequency, at a reduced cost. Therefore, the development of a polymer-based matrix tablet was undertaken to produce a sustained-release dosage form of CBZ, since these dosage forms are relatively simple and cheap to produce when compared to other, more sophisticated forms of sustained-release technology. Preformulation studies were conducted to assess moisture content of excipients and dosage forms and to identify possible incompatibilities between CBZ and potential formulation excipients. Furthermore, studies were conducted to assess the potential for polymorphic transitions to occur during manufacture. Stability testing was conducted to assess the behaviour of the dosage forms under storage conditions that the product may be exposed to. Dissolution testing was undertaken using USP Apparatus 3, which allowed for a more realistic assessment and prediction of in vivo drug release rates. Samples were analysed using a high performance liquid chromatographic method that was developed and validated for the determination of CBZ. Tablets were manufactured by wet granulation and direct compression techniques, and the resultant drug release profiles were evaluated statistically by means of the f1 and f2 difference and similarity factors. The f2 factor was incorporated as an assessment criterion in the design of an artificial neural network that was used to predict drug release profiles and formulation composition. A direct compression tablet formulation was successfully adapted from a prototype wet granulation matrix formulation and a number of formulation variables were assessed to establish their effect(s) on the dissolution rate profile of CBZ that resulted from testing of the dosage forms. The particle size grade of CBZ was also investigated and it was ascertained that fine particle size grade CBZ showed improved drug release profiles when compared to the coarse grade CBZ which was desirable, since CBZ is a highly water insoluble compound. Furthermore, the impact of the viscosity grade and proportion of rate-controlling polymer, viz., hydroxypropyl methylcellulose was also investigated for its effect on drug release rates. The lower viscosity grade was found to be more appropriate for use with CBZ. The type of anti-frictional agent used in the formulations did not appear to affect drug release from the polymeric matrix tablets, however specific compounds may have an effect on the physical characteristics of the polymeric tablets. The resultant formulations did not display zero-order drug release kinetics and a first-order mathematical model was developed to provide an additional resource for athematical analysis of dissolution profiles. An artificial neural network was designed, developed and applied to predict dissolution rate profiles for formulation. Furthermore, the network was used to predict formulation compositions that would produce drug release profiles comparable to the reference product, Tegretol® CR. The formulation composition predicted by the network to match the dissolution profile of the innovator product was manufactured and tested in vitro. The formulation was further manipulated, empirically, so as to match the in vitro dissolution rate profile of Tegretol® CR, more completely. The test tablets that were produced were tested in two health male volunteers using Tegretol® CR 400mg as the reference product. The batch used for this “proof of concept” biostudy was produced in accordance with cGMP guidelines and the protocol in accordance with ICH guidelines. The test matrix tablets revealed in vivo bioavailability profiles for CBZ, however, bioequivalence between the test and reference product could not be established. It can be concluded that the polymeric matrix CBZ tablets have the potential to be used as a twice-daily dosage form for the treatment of relevant seizure disorders.
- Full Text:
- Date Issued: 2006
The yield curve as a forecasting tool : does the yield spread predict recessions in South Africa?
- Authors: Khomo, Melvin Muzi
- Date: 2006
- Subjects: Recessions -- South Africa , Monetary policy -- South Africa , Economic development -- South Africa , Economic indicators -- South Africa , Business cycles -- History -- 20th century , Business cycles -- South Africa , South Africa -- Economic conditions
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1040 , http://hdl.handle.net/10962/d1004722 , Recessions -- South Africa , Monetary policy -- South Africa , Economic development -- South Africa , Economic indicators -- South Africa , Business cycles -- History -- 20th century , Business cycles -- South Africa , South Africa -- Economic conditions
- Description: This paper examines the ability of the yield curve to predict recessions in South Africa, and compares its predictive power with other commonly used variables that include the growth rate in real money supply, changes in stock prices and the index of leading economic indicators. The study also makes an attempt to find out if monetary policy explains the yield spread's predictive power with regards to future economic activity. Regarding methodology, the standard probit model proposed by Estrella and Mishkin (1996) that directly estimates the probability of the economy going into recession is used. Results from this model are compared with a modified probit model suggested by Dueker (1997) that includes a lagged dependent variable. Results presented in the paper provide further evidence that the yield curve, as represented by the yield spread between 3-month and IO-year government paper, can be used to estimate the likelihood of recessions in South Africa. The yield spread can produce recession forecasts up to 18 months, although it's best predictive power is seen at two quarters. Results from the standard probit model and the modified pro bit model with a lagged dependent variable are somewhat similar, although the latter model improves forecasts at shorter horizons up to 3 months. Compared with other indicators, real M3 growth is a noisy indicator and does not provide much information about future recessions, whilst movements in the All-Share index can provide information for up to 12 months but does not do better than the yield curve. The index of leading economic indicators outperforms the yield spread in the short run up to 4 months but the spread performs better at longer horizons. Based on the results from the study, it appears that changes in monetary policy explain the yield spread's predictive power. This is because the yield spread loses its explanatory power when combined with a variable representing the monetary policy stance of the central bank.
- Full Text:
- Date Issued: 2006
- Authors: Khomo, Melvin Muzi
- Date: 2006
- Subjects: Recessions -- South Africa , Monetary policy -- South Africa , Economic development -- South Africa , Economic indicators -- South Africa , Business cycles -- History -- 20th century , Business cycles -- South Africa , South Africa -- Economic conditions
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1040 , http://hdl.handle.net/10962/d1004722 , Recessions -- South Africa , Monetary policy -- South Africa , Economic development -- South Africa , Economic indicators -- South Africa , Business cycles -- History -- 20th century , Business cycles -- South Africa , South Africa -- Economic conditions
- Description: This paper examines the ability of the yield curve to predict recessions in South Africa, and compares its predictive power with other commonly used variables that include the growth rate in real money supply, changes in stock prices and the index of leading economic indicators. The study also makes an attempt to find out if monetary policy explains the yield spread's predictive power with regards to future economic activity. Regarding methodology, the standard probit model proposed by Estrella and Mishkin (1996) that directly estimates the probability of the economy going into recession is used. Results from this model are compared with a modified probit model suggested by Dueker (1997) that includes a lagged dependent variable. Results presented in the paper provide further evidence that the yield curve, as represented by the yield spread between 3-month and IO-year government paper, can be used to estimate the likelihood of recessions in South Africa. The yield spread can produce recession forecasts up to 18 months, although it's best predictive power is seen at two quarters. Results from the standard probit model and the modified pro bit model with a lagged dependent variable are somewhat similar, although the latter model improves forecasts at shorter horizons up to 3 months. Compared with other indicators, real M3 growth is a noisy indicator and does not provide much information about future recessions, whilst movements in the All-Share index can provide information for up to 12 months but does not do better than the yield curve. The index of leading economic indicators outperforms the yield spread in the short run up to 4 months but the spread performs better at longer horizons. Based on the results from the study, it appears that changes in monetary policy explain the yield spread's predictive power. This is because the yield spread loses its explanatory power when combined with a variable representing the monetary policy stance of the central bank.
- Full Text:
- Date Issued: 2006
A global ionospheric F2 region peak electron density model using neural networks and extended geophysically relevant inputs
- Authors: Oyeyemi, Elijah Oyedola
- Date: 2006
- Subjects: Neural networks (Computer science) Ionospheric electron density Ionosphere Ionosphere -- Mathematical models
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5470 , http://hdl.handle.net/10962/d1005255
- Description: This thesis presents my research on the development of a neural network (NN) based global empirical model of the ionospheric F2 region peak electron density using extended geophysically relevant inputs. The main principle behind this approach has been to utilize parameters other than simple geographic co-ordinates, on which the F2 peak electron density is known to depend, and to exploit the technique of NNs, thereby establishing and modeling the non-linear dynamic processes (both in space and time)associated with the F2 region electron density on a global scale. Four different models have been developed in this work. These are the foF2 NN model, M(3000)F2 NN model, short-term forecasting foF2 NN, and a near-real time foF2 NN model. Data used in the training of the NNs were obtained from the worldwide ionosonde stations spanning the period 1964 to 1986 based on availability, which included all periods of calm and disturbed magnetic activity. Common input parameters used in the training of all 4 models are day number (day of the year, DN), Universal Time (UT), a 2 month running mean of the sunspot number (R2), a 2 day running mean of the 3-hour planetary magnetic index ap (A16), solar zenith angle (CHI), geographic latitude (q), magnetic dip angle (I), angle of magnetic declination (D), angle of meridian relative to subsolar point (M). For the short-term and near-real time foF2 models, additional input parameters related to recent past observations of foF2 itself were included in the training of the NNs. The results of the foF2 NN model and M(3000)F2 NN model presented in this work, which compare favourably with the IRI (International Reference Ionosphere) model successfully demonstrate the potential of NNs for spatial and temporal modeling of the ionospheric parameters foF2 and M(3000)F2 globally. The results obtained from the short-term foF2 NN model and nearreal time foF2 NN model reveal that, in addition to the temporal and spatial input variables, short-term forecasting of foF2 is much improved by including past observations of foF2 itself. Results obtained from the near-real time foF2 NN model also reveal that there exists a correlation between measured foF2 values at different locations across the globe. Again, comparisons of the foF2 NN model and M(3000)F2 NN model predictions with that of the IRI model predictions and observed values at some selected high latitude stations, suggest that the NN technique can successfully be employed to model the complex irregularities associated with the high latitude regions. Based on the results obtained in this research and the comparison made with the IRI model (URSI and CCIR coefficients), these results justify consideration of the NN technique for the prediction of global ionospheric parameters. I believe that, after consideration by the IRI community, these models will prove to be valuable to both the high frequency (HF) communication and worldwide ionospheric communities.
- Full Text:
- Date Issued: 2006
- Authors: Oyeyemi, Elijah Oyedola
- Date: 2006
- Subjects: Neural networks (Computer science) Ionospheric electron density Ionosphere Ionosphere -- Mathematical models
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5470 , http://hdl.handle.net/10962/d1005255
- Description: This thesis presents my research on the development of a neural network (NN) based global empirical model of the ionospheric F2 region peak electron density using extended geophysically relevant inputs. The main principle behind this approach has been to utilize parameters other than simple geographic co-ordinates, on which the F2 peak electron density is known to depend, and to exploit the technique of NNs, thereby establishing and modeling the non-linear dynamic processes (both in space and time)associated with the F2 region electron density on a global scale. Four different models have been developed in this work. These are the foF2 NN model, M(3000)F2 NN model, short-term forecasting foF2 NN, and a near-real time foF2 NN model. Data used in the training of the NNs were obtained from the worldwide ionosonde stations spanning the period 1964 to 1986 based on availability, which included all periods of calm and disturbed magnetic activity. Common input parameters used in the training of all 4 models are day number (day of the year, DN), Universal Time (UT), a 2 month running mean of the sunspot number (R2), a 2 day running mean of the 3-hour planetary magnetic index ap (A16), solar zenith angle (CHI), geographic latitude (q), magnetic dip angle (I), angle of magnetic declination (D), angle of meridian relative to subsolar point (M). For the short-term and near-real time foF2 models, additional input parameters related to recent past observations of foF2 itself were included in the training of the NNs. The results of the foF2 NN model and M(3000)F2 NN model presented in this work, which compare favourably with the IRI (International Reference Ionosphere) model successfully demonstrate the potential of NNs for spatial and temporal modeling of the ionospheric parameters foF2 and M(3000)F2 globally. The results obtained from the short-term foF2 NN model and nearreal time foF2 NN model reveal that, in addition to the temporal and spatial input variables, short-term forecasting of foF2 is much improved by including past observations of foF2 itself. Results obtained from the near-real time foF2 NN model also reveal that there exists a correlation between measured foF2 values at different locations across the globe. Again, comparisons of the foF2 NN model and M(3000)F2 NN model predictions with that of the IRI model predictions and observed values at some selected high latitude stations, suggest that the NN technique can successfully be employed to model the complex irregularities associated with the high latitude regions. Based on the results obtained in this research and the comparison made with the IRI model (URSI and CCIR coefficients), these results justify consideration of the NN technique for the prediction of global ionospheric parameters. I believe that, after consideration by the IRI community, these models will prove to be valuable to both the high frequency (HF) communication and worldwide ionospheric communities.
- Full Text:
- Date Issued: 2006
The evaluation of environmental learning support materials : a case study of the AAWARE teacher's guide
- Authors: Glover, Dawn
- Date: 2006
- Subjects: Environmental education -- South Africa -- Western Cape , Environmental education -- Curricula -- South Africa -- Western Cape , Teaching -- Aids and devices -- South Africa -- Western Cape
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1945 , http://hdl.handle.net/10962/d1008064 , Environmental education -- South Africa -- Western Cape , Environmental education -- Curricula -- South Africa -- Western Cape , Teaching -- Aids and devices -- South Africa -- Western Cape
- Description: This evaluative case study investigates the use of a specific learning support materials (LSMs) package, Animal Awareness for World and Regional Education (AA WARE), in the natural sciences, intermediate phase. Schools with access to the resource were canvassed through questionnaires to assess overall use in relation to distribution via workshop versus hand delivery, class size, availability of alternate LSMs and lastly the level of exposure to the distributing organisation. Three case studies were undertaken at three different schools. Data was generated through observations and interviews with the teacher undertaking the lesson observed. The aim of the case studies was to gain greater insight into AAWARE in practice and the factors that facilitated the use of the resource by these teachers. The research indicates that while AAWARE has overcome some inhibitors of resource use, its potential within Outcomes-Based Education (OBE) and the Revised National Curriculum Statements (RNCS) has not been achieved so far, except in a few isolated cases. Factors enabling the use of the resource are its user-friendly design, availability in all three languages spoken by the majority of Western Cape learners and the integration with education policy. Workshops, although not necessary for the utilisation of AA WARE in part, could enhance the integrated nature of the resource and introduce teachers to the potential of using the resource as an entire unit as opposed to a collection of separate lesson plans. A relationship is seen between exposure to the distributing organisation, the personal interest in wildlife of the teacher and the use of AAWARE. Finally recommendations are provided to increase the use of AA WARE. It is suggested that the resource undergoes a more effective alignment to RNCS content (RNCS policy was not an issue) now that RNCS implementation is completed. Further workshops should be offered in the use of AA WARE. Lastly a long-term strategy should be developed to enthuse schools and teachers about the intentions, goals and appropriateness of the resource.
- Full Text:
- Date Issued: 2006
- Authors: Glover, Dawn
- Date: 2006
- Subjects: Environmental education -- South Africa -- Western Cape , Environmental education -- Curricula -- South Africa -- Western Cape , Teaching -- Aids and devices -- South Africa -- Western Cape
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1945 , http://hdl.handle.net/10962/d1008064 , Environmental education -- South Africa -- Western Cape , Environmental education -- Curricula -- South Africa -- Western Cape , Teaching -- Aids and devices -- South Africa -- Western Cape
- Description: This evaluative case study investigates the use of a specific learning support materials (LSMs) package, Animal Awareness for World and Regional Education (AA WARE), in the natural sciences, intermediate phase. Schools with access to the resource were canvassed through questionnaires to assess overall use in relation to distribution via workshop versus hand delivery, class size, availability of alternate LSMs and lastly the level of exposure to the distributing organisation. Three case studies were undertaken at three different schools. Data was generated through observations and interviews with the teacher undertaking the lesson observed. The aim of the case studies was to gain greater insight into AAWARE in practice and the factors that facilitated the use of the resource by these teachers. The research indicates that while AAWARE has overcome some inhibitors of resource use, its potential within Outcomes-Based Education (OBE) and the Revised National Curriculum Statements (RNCS) has not been achieved so far, except in a few isolated cases. Factors enabling the use of the resource are its user-friendly design, availability in all three languages spoken by the majority of Western Cape learners and the integration with education policy. Workshops, although not necessary for the utilisation of AA WARE in part, could enhance the integrated nature of the resource and introduce teachers to the potential of using the resource as an entire unit as opposed to a collection of separate lesson plans. A relationship is seen between exposure to the distributing organisation, the personal interest in wildlife of the teacher and the use of AAWARE. Finally recommendations are provided to increase the use of AA WARE. It is suggested that the resource undergoes a more effective alignment to RNCS content (RNCS policy was not an issue) now that RNCS implementation is completed. Further workshops should be offered in the use of AA WARE. Lastly a long-term strategy should be developed to enthuse schools and teachers about the intentions, goals and appropriateness of the resource.
- Full Text:
- Date Issued: 2006
Does primary resource-based industrialisation offer an escape from underdevelopment?
- Authors: Ali, Fatimah
- Date: 2006
- Subjects: Comparative advantage (International trade) , Exports -- Africa, West , Exports -- Mauritius , Exports -- South Africa , Foreign trade promotion -- Mauritius , International trade , Primary commodities -- Africa , Human capital -- Economic aspects -- Africa , Natural resources -- Africa , Africa -- Commerce
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1018 , http://hdl.handle.net/10962/d1002753 , Comparative advantage (International trade) , Exports -- Africa, West , Exports -- Mauritius , Exports -- South Africa , Foreign trade promotion -- Mauritius , International trade , Primary commodities -- Africa , Human capital -- Economic aspects -- Africa , Natural resources -- Africa , Africa -- Commerce
- Description: It is commonly believed about sub-Saharan Africa (SSA) that the region has a comparative advantage in primary resources as reflected by its high share of primary exports to total exports. In acknowledging the region's comparative advantage, the study tries to put the determinants from the Wood and Mayer (1998, (999) (W-M) Heckscher-Ohlin based model in the context of two relatively diversified countries (South Africa and Mauritius) and two commodity-export-dependent countries of sub-Saharan Africa (Nigeria and Cô̌̌te d'Ivoire). The study finds that the skill and land resource measures used in the W -M (1998, 1999) thesis do not explain why Nigeria, having a similar level of skill per worker ratio to South Africa, has not diversified. Further, Mauritius having relatively the highest skill per land ratio specialises in low-skill textiles and clothing, while South Africa specialises in the more human capital-intensive "other manufactures" group. The other measure, a low land per worker ratio that explains Mauritius' relatively higher share of manufacturing exports, also fails to apply to Nigeria. The thesis thus concludes that the W-M land and skill measures could only be rough proxies in determining comparative advantage in manufacturing exports. However, employing the Dutch disease hypothesis recognises the potential of land abundance as a natural resource, namely minerals in South Africa, oil in Nigeria, and cocoa in Cǒ̌te d'Ivoire. The Dutch disease is a dynamic process of structural economic and political development that will permit an understanding of why natural resource abundant countries do not have a comparative advantage in manufacturing, at least in the short to medium term. The study therefore investigates commodity dependence and the Dutch disease effects to examine whether primary resource- based industrialisation offers an escape from underdevelopment. It establishes that South Africa, a mineral resource rich country, diversified based on a broad mineral-energy-complex (MEC) reinforcing the notion that land abundant countries will first invest in capital- intensive primary resource processing. However, the thesis concludes that in Nigeria and Cǒ̌te d'Ivoire where external shocks are more predominant probably because of single commodity export reliance, the manufacturing sector lags behind more due to resource and spending effects that a natural resource boom generates in these economies.
- Full Text:
- Date Issued: 2006
- Authors: Ali, Fatimah
- Date: 2006
- Subjects: Comparative advantage (International trade) , Exports -- Africa, West , Exports -- Mauritius , Exports -- South Africa , Foreign trade promotion -- Mauritius , International trade , Primary commodities -- Africa , Human capital -- Economic aspects -- Africa , Natural resources -- Africa , Africa -- Commerce
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1018 , http://hdl.handle.net/10962/d1002753 , Comparative advantage (International trade) , Exports -- Africa, West , Exports -- Mauritius , Exports -- South Africa , Foreign trade promotion -- Mauritius , International trade , Primary commodities -- Africa , Human capital -- Economic aspects -- Africa , Natural resources -- Africa , Africa -- Commerce
- Description: It is commonly believed about sub-Saharan Africa (SSA) that the region has a comparative advantage in primary resources as reflected by its high share of primary exports to total exports. In acknowledging the region's comparative advantage, the study tries to put the determinants from the Wood and Mayer (1998, (999) (W-M) Heckscher-Ohlin based model in the context of two relatively diversified countries (South Africa and Mauritius) and two commodity-export-dependent countries of sub-Saharan Africa (Nigeria and Cô̌̌te d'Ivoire). The study finds that the skill and land resource measures used in the W -M (1998, 1999) thesis do not explain why Nigeria, having a similar level of skill per worker ratio to South Africa, has not diversified. Further, Mauritius having relatively the highest skill per land ratio specialises in low-skill textiles and clothing, while South Africa specialises in the more human capital-intensive "other manufactures" group. The other measure, a low land per worker ratio that explains Mauritius' relatively higher share of manufacturing exports, also fails to apply to Nigeria. The thesis thus concludes that the W-M land and skill measures could only be rough proxies in determining comparative advantage in manufacturing exports. However, employing the Dutch disease hypothesis recognises the potential of land abundance as a natural resource, namely minerals in South Africa, oil in Nigeria, and cocoa in Cǒ̌te d'Ivoire. The Dutch disease is a dynamic process of structural economic and political development that will permit an understanding of why natural resource abundant countries do not have a comparative advantage in manufacturing, at least in the short to medium term. The study therefore investigates commodity dependence and the Dutch disease effects to examine whether primary resource- based industrialisation offers an escape from underdevelopment. It establishes that South Africa, a mineral resource rich country, diversified based on a broad mineral-energy-complex (MEC) reinforcing the notion that land abundant countries will first invest in capital- intensive primary resource processing. However, the thesis concludes that in Nigeria and Cǒ̌te d'Ivoire where external shocks are more predominant probably because of single commodity export reliance, the manufacturing sector lags behind more due to resource and spending effects that a natural resource boom generates in these economies.
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- Date Issued: 2006