A combination of platinum anticancer drugs and mangiferin causes increased efficacy in cancer cell lines
- Authors: Du Plessis-Stoman, Debbie
- Date: 2010
- Subjects: Cancer -- Chemotherapy , Antineoplastic agents , Platinum compounds -- Therapeutic use , Cancer cells
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10338 , http://hdl.handle.net/10948/d1016160
- Description: This thesis mainly deals with some biochemical aspects regarding the efficacy of novel platinum anticancer compounds alone and in combination with mangiferin, as part of a broader study in which both chemistry and biochemistry are involved. Various novel diamine and N-S donor chelate compounds of platinum II and IV have been developed in which factors such as stereochemistry, ligand exchange rate and biocompatibility were considered as additional parameters. In the first order testing, each of these compounds was tested with reference to their “killing” potential by comparing their rate of killing, over a period of 48 hours with those of cisplatin and oxaliplatin. Numerous novel compounds were tested in this way, using the MTT cell viability assay and the three cancer cell lines MCF7, HT29 and HeLa. Although only a few could be regarded as equal to or even better than cisplatin, CPA7 and oxaliplatin, the testing of these compounds on cancer cells provided useful knowledge for the further development of novel compounds. Three of the better compounds, namely Yol 25, Yol 29.1 and Mar 4.1.4 were selected for further studies, together with oxaliplatin and CPA7 as positive controls, to obtain more detailed knowledge of their anticancer action, both alone and when applied in combination with mangiferin. In addition to the above, resistant cells were produced for each of the three different cell lines tested and all the selected compounds, both in the presence and absence of mangiferin. The effects of these treatments on the activation of NFĸB when applied to normal and resistant cell lines were also investigated. All the compounds induced apoptosis in the cell lines tested as well as alter the DNA cycle at one or more phase. Additionally, combination of these compounds with mangiferin enhanced the above-mentioned effects. Mangiferin decreases the IC50 values of the platinum drugs by up to 3.4 times and, although mangiferin alone did not induce cell cycle arrest, the presence of mangiferin in combination with oxaliplatin and Yol 25 shows an earlier and greatly enhanced delay in the S-phase, while cells treated with CPA7, Yol 29.1 and Mar 4.1.4 in combination with mangiferin showed a later, but greatly enhanced delay in the S-phase. It was also found that mangiferin acts as an NFĸB inhibitor when applied in combination with these drugs, which, in turn, reduces the occurrence of resistance in the cell lines. Resistance to oxaliplatin was counteracted by the combination with mangiferin in HeLa and HT29, but not in MCF7 cells, while resistance to CPA7 was only counteracted in the MCF7 cell line. Yol 25 and Mar 4.1.4 did not seem to induce resistance in HeLa and MCF7 cells, but did in HT29 cells, whereas Yol 29.1 caused resistance in HeLa and HT29 cells, but not in MCF7 cells. Finally, an effort was made to evaluate the different compounds by comparing them with respect to their properties relating to anticancer action with and without the addition of mangiferin.
- Full Text:
- Date Issued: 2010
- Authors: Du Plessis-Stoman, Debbie
- Date: 2010
- Subjects: Cancer -- Chemotherapy , Antineoplastic agents , Platinum compounds -- Therapeutic use , Cancer cells
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10338 , http://hdl.handle.net/10948/d1016160
- Description: This thesis mainly deals with some biochemical aspects regarding the efficacy of novel platinum anticancer compounds alone and in combination with mangiferin, as part of a broader study in which both chemistry and biochemistry are involved. Various novel diamine and N-S donor chelate compounds of platinum II and IV have been developed in which factors such as stereochemistry, ligand exchange rate and biocompatibility were considered as additional parameters. In the first order testing, each of these compounds was tested with reference to their “killing” potential by comparing their rate of killing, over a period of 48 hours with those of cisplatin and oxaliplatin. Numerous novel compounds were tested in this way, using the MTT cell viability assay and the three cancer cell lines MCF7, HT29 and HeLa. Although only a few could be regarded as equal to or even better than cisplatin, CPA7 and oxaliplatin, the testing of these compounds on cancer cells provided useful knowledge for the further development of novel compounds. Three of the better compounds, namely Yol 25, Yol 29.1 and Mar 4.1.4 were selected for further studies, together with oxaliplatin and CPA7 as positive controls, to obtain more detailed knowledge of their anticancer action, both alone and when applied in combination with mangiferin. In addition to the above, resistant cells were produced for each of the three different cell lines tested and all the selected compounds, both in the presence and absence of mangiferin. The effects of these treatments on the activation of NFĸB when applied to normal and resistant cell lines were also investigated. All the compounds induced apoptosis in the cell lines tested as well as alter the DNA cycle at one or more phase. Additionally, combination of these compounds with mangiferin enhanced the above-mentioned effects. Mangiferin decreases the IC50 values of the platinum drugs by up to 3.4 times and, although mangiferin alone did not induce cell cycle arrest, the presence of mangiferin in combination with oxaliplatin and Yol 25 shows an earlier and greatly enhanced delay in the S-phase, while cells treated with CPA7, Yol 29.1 and Mar 4.1.4 in combination with mangiferin showed a later, but greatly enhanced delay in the S-phase. It was also found that mangiferin acts as an NFĸB inhibitor when applied in combination with these drugs, which, in turn, reduces the occurrence of resistance in the cell lines. Resistance to oxaliplatin was counteracted by the combination with mangiferin in HeLa and HT29, but not in MCF7 cells, while resistance to CPA7 was only counteracted in the MCF7 cell line. Yol 25 and Mar 4.1.4 did not seem to induce resistance in HeLa and MCF7 cells, but did in HT29 cells, whereas Yol 29.1 caused resistance in HeLa and HT29 cells, but not in MCF7 cells. Finally, an effort was made to evaluate the different compounds by comparing them with respect to their properties relating to anticancer action with and without the addition of mangiferin.
- Full Text:
- Date Issued: 2010
A comparison between the written English of deaf and hearing children in the Nelson Mandela Metropole
- Authors: Weir, Carolyn Louise
- Date: 2010
- Subjects: Deaf children -- Education -- South Africa , English language -- Written English
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8361 , http://hdl.handle.net/10948/1083 , Deaf children -- Education -- South Africa , English language -- Written English
- Description: The main purposes of this thesis are to investigate the difference between the written English of deaf children and the written English of hearing children and to make recommendations on how to improve the writing of deaf children. In order to achieve this goal, both quantitative and qualitative research was done. The comparison of the writing of deaf and hearing children relies on quantitative research while the recommendations are based on qualitative analysis. The dissertation is divided into seven chapters. The first chapter discusses the problem, the significance of the research, the purpose of the study, the background to the problem and the theoretical framework. This chapter indicates the prevalence of deafness worldwide and in South Africa and its negative impact on the writing abilities of children. The second chapter provides a literature review on the theory behind reading and writing, with specific emphasis on emergent literacy and its relevance to the language acquisition and print language learning of deaf children. Another aspect of this chapter is the effect of different aspects of deafness on language acquisition and learning. The chapter also highlights the challenges for deaf children in South Africa and debates regarding the language of instruction that should be used to teach deaf children writing/reading, as well as arguments concerning bottom-up, top-down, and interactive approaches to writing. The third chapter provides the overall philosophical framework for the quantitative and qualitative research as well as the methodology used for the qualitative research. This is followed by the results of the quantitative research and a discussion of these results in Chapter 4. The fifth chapter is in the form of a second literature review that contains recommendations for improving the writing of deaf children. Following this, in Chapter 6, is a discussion of some of the theory behind interview interaction, as well as an analysis of how to develop a valid study. The researcher also sets out the interview structure. The seventh chapter contains a discussion of the findings of the interview to see if they confirm the findings in Chapter 5, as well as overall conclusions about assisting deaf children with their writing, a reflection on the study as a whole and suggestions for future research. This study argues that in order for deaf children in South Africa to develop their writing, immediate government assistance is necessary in order to implement countrywide newborn hearing screening, followed by medical and/or language-based ii intervention to minimise the impact of deafness on the language and writing abilities of deaf children. This is an essential foundation from which parents and teachers can build and play a key role in helping their children reach age-appropriate levels of written English.
- Full Text:
- Date Issued: 2010
- Authors: Weir, Carolyn Louise
- Date: 2010
- Subjects: Deaf children -- Education -- South Africa , English language -- Written English
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8361 , http://hdl.handle.net/10948/1083 , Deaf children -- Education -- South Africa , English language -- Written English
- Description: The main purposes of this thesis are to investigate the difference between the written English of deaf children and the written English of hearing children and to make recommendations on how to improve the writing of deaf children. In order to achieve this goal, both quantitative and qualitative research was done. The comparison of the writing of deaf and hearing children relies on quantitative research while the recommendations are based on qualitative analysis. The dissertation is divided into seven chapters. The first chapter discusses the problem, the significance of the research, the purpose of the study, the background to the problem and the theoretical framework. This chapter indicates the prevalence of deafness worldwide and in South Africa and its negative impact on the writing abilities of children. The second chapter provides a literature review on the theory behind reading and writing, with specific emphasis on emergent literacy and its relevance to the language acquisition and print language learning of deaf children. Another aspect of this chapter is the effect of different aspects of deafness on language acquisition and learning. The chapter also highlights the challenges for deaf children in South Africa and debates regarding the language of instruction that should be used to teach deaf children writing/reading, as well as arguments concerning bottom-up, top-down, and interactive approaches to writing. The third chapter provides the overall philosophical framework for the quantitative and qualitative research as well as the methodology used for the qualitative research. This is followed by the results of the quantitative research and a discussion of these results in Chapter 4. The fifth chapter is in the form of a second literature review that contains recommendations for improving the writing of deaf children. Following this, in Chapter 6, is a discussion of some of the theory behind interview interaction, as well as an analysis of how to develop a valid study. The researcher also sets out the interview structure. The seventh chapter contains a discussion of the findings of the interview to see if they confirm the findings in Chapter 5, as well as overall conclusions about assisting deaf children with their writing, a reflection on the study as a whole and suggestions for future research. This study argues that in order for deaf children in South Africa to develop their writing, immediate government assistance is necessary in order to implement countrywide newborn hearing screening, followed by medical and/or language-based ii intervention to minimise the impact of deafness on the language and writing abilities of deaf children. This is an essential foundation from which parents and teachers can build and play a key role in helping their children reach age-appropriate levels of written English.
- Full Text:
- Date Issued: 2010
A comparison of ecosystem health and services provided by subtropical thicket in and around the Bathurst commonage
- Authors: Stickler, Meredith Mercedes
- Date: 2010
- Subjects: Ecosystem services -- South Africa -- Bathurst , Ecosystem management , Commons -- South Africa -- Bathurst , Natural resources, Communal -- South Africa -- Bathurst , Land use, Rural -- South Africa -- Eastern Cape , Ecosystem health -- South Africa -- Bathurst
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4766 , http://hdl.handle.net/10962/d1007169 , Ecosystem services -- South Africa -- Bathurst , Ecosystem management , Commons -- South Africa -- Bathurst , Natural resources, Communal -- South Africa -- Bathurst , Land use, Rural -- South Africa -- Eastern Cape , Ecosystem health -- South Africa -- Bathurst
- Description: Municipal commonage in South Africa offers previously disadvantaged, landless residents access to both direct ecosystem goods and services (EGS) that provide additional income options and indirect social and cultural services. Given that EGS production is a function of ecosystem health, it is imperative that commonage land be managed to maximize current local benefit streams while ensuring future options through the maintenance of natural ecosystem functions. The payments for ecosystem services (PES) model potentially offers an opportunity for contributing to local economic development while providing fiscal incentives for environmentally sustainable natural resource management. PES depends on the demonstration of quantifiable changes in EGS delivery due to improvement in or maintenance of high ecosystem health that are a verifiable result of modifications in management behavior. This thesis therefore compared spatial variations in (i) ecosystem health and (ii) nine direct and indirect EGS values derived from natural resources on the Bathurst municipal commonage and neighboring Waters Meeting Nature Reserve (NR) to explore how different land use intensities affect ecosystem health and the resulting provision of EGS. The results indicate that the total economic value of annually produced EGS on the study site is nearly R 9.8 million (US$ 1.2 million), with a standing stock of natural capital worth some R 28 million (US$ 3.4 million). Nearly 45% of the total annual production is attributed to Waters Meeting NR, with roughly 34% from the low use zone of the commonage and the remaining 22% from the high use zone. Of the total annual production value on the study site, roughly 59% is derived from indirect (non-consumptive) uses of wildlife for the study site as a whole, though this proportion varies from 25% in the high use zone of the commonage to 94% on Waters Meeting NR. The two largest annual production values on the study site derive from ecotourism (R 3.5 million, US$ 0.4 million) and livestock production (R 2.6 million, US$ 0.3 million), suggesting that while increased production of indirect EGS could generate significant additional revenues, especially on Waters Meeting NR and in the low use zone of the commonage, direct (consumptive) EGS will likely remain an important component of land use on the commonage. A PES project to support the adoption of silvo-pastoral practices could provide positive incentives for improved land use practices on the commonage and potentially be financed by conservation-friendly residents of the Kowie River catchment and/or increased ecotourism revenues from Waters Meeting NR. Allowing carefully designed and monitored local access to natural resources within Waters Meeting NR could also reduce pressure on commonage resources. Together, these approaches could lead to a more sustainable subtropical thicket landscape and ensure that critical natural resources remain available to support local livelihoods in the long-term.
- Full Text:
- Date Issued: 2010
- Authors: Stickler, Meredith Mercedes
- Date: 2010
- Subjects: Ecosystem services -- South Africa -- Bathurst , Ecosystem management , Commons -- South Africa -- Bathurst , Natural resources, Communal -- South Africa -- Bathurst , Land use, Rural -- South Africa -- Eastern Cape , Ecosystem health -- South Africa -- Bathurst
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4766 , http://hdl.handle.net/10962/d1007169 , Ecosystem services -- South Africa -- Bathurst , Ecosystem management , Commons -- South Africa -- Bathurst , Natural resources, Communal -- South Africa -- Bathurst , Land use, Rural -- South Africa -- Eastern Cape , Ecosystem health -- South Africa -- Bathurst
- Description: Municipal commonage in South Africa offers previously disadvantaged, landless residents access to both direct ecosystem goods and services (EGS) that provide additional income options and indirect social and cultural services. Given that EGS production is a function of ecosystem health, it is imperative that commonage land be managed to maximize current local benefit streams while ensuring future options through the maintenance of natural ecosystem functions. The payments for ecosystem services (PES) model potentially offers an opportunity for contributing to local economic development while providing fiscal incentives for environmentally sustainable natural resource management. PES depends on the demonstration of quantifiable changes in EGS delivery due to improvement in or maintenance of high ecosystem health that are a verifiable result of modifications in management behavior. This thesis therefore compared spatial variations in (i) ecosystem health and (ii) nine direct and indirect EGS values derived from natural resources on the Bathurst municipal commonage and neighboring Waters Meeting Nature Reserve (NR) to explore how different land use intensities affect ecosystem health and the resulting provision of EGS. The results indicate that the total economic value of annually produced EGS on the study site is nearly R 9.8 million (US$ 1.2 million), with a standing stock of natural capital worth some R 28 million (US$ 3.4 million). Nearly 45% of the total annual production is attributed to Waters Meeting NR, with roughly 34% from the low use zone of the commonage and the remaining 22% from the high use zone. Of the total annual production value on the study site, roughly 59% is derived from indirect (non-consumptive) uses of wildlife for the study site as a whole, though this proportion varies from 25% in the high use zone of the commonage to 94% on Waters Meeting NR. The two largest annual production values on the study site derive from ecotourism (R 3.5 million, US$ 0.4 million) and livestock production (R 2.6 million, US$ 0.3 million), suggesting that while increased production of indirect EGS could generate significant additional revenues, especially on Waters Meeting NR and in the low use zone of the commonage, direct (consumptive) EGS will likely remain an important component of land use on the commonage. A PES project to support the adoption of silvo-pastoral practices could provide positive incentives for improved land use practices on the commonage and potentially be financed by conservation-friendly residents of the Kowie River catchment and/or increased ecotourism revenues from Waters Meeting NR. Allowing carefully designed and monitored local access to natural resources within Waters Meeting NR could also reduce pressure on commonage resources. Together, these approaches could lead to a more sustainable subtropical thicket landscape and ensure that critical natural resources remain available to support local livelihoods in the long-term.
- Full Text:
- Date Issued: 2010
A comparison of two sampling methods for surveying mammalian herbivore impacts on beetle communities in the canopy of Acacia drepanolobium in Kenya
- Kuria, K S, Villet, Martin H, Palmer, T, Stanton, M
- Authors: Kuria, K S , Villet, Martin H , Palmer, T , Stanton, M
- Date: 2010
- Language: English
- Type: Article
- Identifier: vital:6860 , http://hdl.handle.net/10962/d1011150
- Description: Even though several methods are used to sample and monitor canopy arthropods, there are no studies to indicate which of these methods is more effective.We compared the efficacy of the beating and canopy fogging methods in collecting beetles that inhabit Acacia drepanolobium (Harms) tree canopies at Mpala Research Centre in Laikipia district, Kenya. These trees grow naturally on the black cotton soils of the Laikipia ecosystem, accounting for more than 98%of the overstorey at the study site, and are important for local cattle and wildlife production. The ultimate objective of this study was to determine the effect of differential grazing and browsing pressure from large mammalian herbivores on the beetle communities of A. drepanolobium. Seven hundred and twenty trees 1.0–2.5 m tall were sampled using each method, making a total of 1440 trees. Sampling using the two methods was done concurrently and repeated quarterly over a period of 14 months. In total, 4320 individuals were collected, 1456 by beating and 2864 by fogging. The methods jointly yielded beetle specimens from 13 families and 55 morphospecies. Fogging collected significantly more beetle morphospecies than beating, and there was a significant interaction effect between method and sampling date. We found that numerically Anthicidae and Curculionidae responded positively to the presence of cattle.We also found that Anthicidae sp. A and Myllocerus sp. A numbers significantly increased in plots where livestock were grazed.
- Full Text:
- Date Issued: 2010
- Authors: Kuria, K S , Villet, Martin H , Palmer, T , Stanton, M
- Date: 2010
- Language: English
- Type: Article
- Identifier: vital:6860 , http://hdl.handle.net/10962/d1011150
- Description: Even though several methods are used to sample and monitor canopy arthropods, there are no studies to indicate which of these methods is more effective.We compared the efficacy of the beating and canopy fogging methods in collecting beetles that inhabit Acacia drepanolobium (Harms) tree canopies at Mpala Research Centre in Laikipia district, Kenya. These trees grow naturally on the black cotton soils of the Laikipia ecosystem, accounting for more than 98%of the overstorey at the study site, and are important for local cattle and wildlife production. The ultimate objective of this study was to determine the effect of differential grazing and browsing pressure from large mammalian herbivores on the beetle communities of A. drepanolobium. Seven hundred and twenty trees 1.0–2.5 m tall were sampled using each method, making a total of 1440 trees. Sampling using the two methods was done concurrently and repeated quarterly over a period of 14 months. In total, 4320 individuals were collected, 1456 by beating and 2864 by fogging. The methods jointly yielded beetle specimens from 13 families and 55 morphospecies. Fogging collected significantly more beetle morphospecies than beating, and there was a significant interaction effect between method and sampling date. We found that numerically Anthicidae and Curculionidae responded positively to the presence of cattle.We also found that Anthicidae sp. A and Myllocerus sp. A numbers significantly increased in plots where livestock were grazed.
- Full Text:
- Date Issued: 2010
A computing studio method for teaching design thinking
- Authors: Van der Post, Leda
- Date: 2010
- Subjects: Creative thinking -- Study and teaching , Creative ability -- Study and teaching , Management information systems
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10465 , http://hdl.handle.net/10948/1128 , Creative thinking -- Study and teaching , Creative ability -- Study and teaching , Management information systems
- Description: Current trends in technology have led to a need for creativity and innovation in the design of contemporary digital products and systems. This has resulted in design thinking and creative design process having a higher profile in digital design practice. In turn, this has impacted computing education, by creating a need for computing students to develop creativity and design thinking skills. Creative design is taught using design studio teaching methods, which require a culture, environment and activities that are different to the teaching methods used in traditional computing education. Some computing academics have implemented courses using aspects of studio teaching methods, but no clear guidelines for a computing academic without creative design experience to fully apply studio teaching methods in courses could be found. The reason for the change in the role of design in the digital domain and how it affected the needs of computing students was investigated and a comparison of typical design studio and computing teaching methods was conducted using a learning systems model adapted for this specific purpose. This led to an identification of areas that required further investigation, or gaps in the knowledge of how to adapt design studio methods for use within a traditional computing education environment. These gaps were used as the basis for identifying a set of research questions for an empirical study. An exploratory case study was conducted at the Nelson Mandela Metropolitan University to answer the research questions. Three computing academics implemented studio teaching methods within three separate modules, following provisional guidelines devised from the preliminary research. Feedback was collected from the lecturers and the students registered for the modules regarding their experiences. It was found that it would be possible for computing academics to implement aspects of a design studio approach within the existing computing environment. An explicit teaching method, termed the computing studio teaching method, was developed from the results of the case study. This teaching method aims to provide computing academics with little or no creative design experience with explicit methods for implementing modified design studio teaching methods in order to promote creativity and design thinking within traditional computing modules. This teaching method will be tested, validated and refined in future research.
- Full Text:
- Date Issued: 2010
- Authors: Van der Post, Leda
- Date: 2010
- Subjects: Creative thinking -- Study and teaching , Creative ability -- Study and teaching , Management information systems
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10465 , http://hdl.handle.net/10948/1128 , Creative thinking -- Study and teaching , Creative ability -- Study and teaching , Management information systems
- Description: Current trends in technology have led to a need for creativity and innovation in the design of contemporary digital products and systems. This has resulted in design thinking and creative design process having a higher profile in digital design practice. In turn, this has impacted computing education, by creating a need for computing students to develop creativity and design thinking skills. Creative design is taught using design studio teaching methods, which require a culture, environment and activities that are different to the teaching methods used in traditional computing education. Some computing academics have implemented courses using aspects of studio teaching methods, but no clear guidelines for a computing academic without creative design experience to fully apply studio teaching methods in courses could be found. The reason for the change in the role of design in the digital domain and how it affected the needs of computing students was investigated and a comparison of typical design studio and computing teaching methods was conducted using a learning systems model adapted for this specific purpose. This led to an identification of areas that required further investigation, or gaps in the knowledge of how to adapt design studio methods for use within a traditional computing education environment. These gaps were used as the basis for identifying a set of research questions for an empirical study. An exploratory case study was conducted at the Nelson Mandela Metropolitan University to answer the research questions. Three computing academics implemented studio teaching methods within three separate modules, following provisional guidelines devised from the preliminary research. Feedback was collected from the lecturers and the students registered for the modules regarding their experiences. It was found that it would be possible for computing academics to implement aspects of a design studio approach within the existing computing environment. An explicit teaching method, termed the computing studio teaching method, was developed from the results of the case study. This teaching method aims to provide computing academics with little or no creative design experience with explicit methods for implementing modified design studio teaching methods in order to promote creativity and design thinking within traditional computing modules. This teaching method will be tested, validated and refined in future research.
- Full Text:
- Date Issued: 2010
A contribution to TEC modelling over Southern Africa using GPS data
- Authors: Habarulema, John Bosco
- Date: 2010
- Subjects: Electrons -- Mathematical models Radio wave propagation Global positioning system -- Measurement Ionospheric radio wave propagation Atmospheric physics -- Africa, Southern
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5456 , http://hdl.handle.net/10962/d1005241
- Description: Modelling ionospheric total electron content (TEC) is an important area of interest for radio wave propagation, geodesy, surveying, the understanding of space weather dynamics and error correction in relation to Global Navigation Satellite Systems (GNNS) applications. With the utilisation of improved ionosonde technology coupled with the use of GNSS, the response of technological systems due to changes in the ionosphere during both quiet and disturbed conditions can be historically inferred. TEC values are usually derived from GNSS measurements using mathematically intensive algorithms. However, the techniques used to estimate these TEC values depend heavily on the availability of near-real time GNSS data, and therefore, are sometimes unable to generate complete datasets. This thesis investigated possibilities for the modelling of TEC values derived from the South African Global Positioning System (GPS)receiver network using linear regression methods and artificial neural networks (NNs). GPS TEC values were derived using the Adjusted Spherical Harmonic Analysis (ASHA) algorithm. Considering TEC and the factors that influence its variability as “dependent and independent variables” respectively, the capabilities of linear regression methods and NNs for TEC modelling were first investigated using a small dataset from two GPS receiver stations. NN and regression models were separately developed and used to reproduce TEC fluctuations at different stations not included in the models’ development. For this purpose, TEC was modelled as a function of diurnal variation, seasonal variation, solar and magnetic activities. Comparative analysis showed that NN models provide predictions of GPS TEC that were an improvement on those predicted by the regression models developed. A separate study to empirically investigate the effects of solar wind on GPS TEC was carried out. Quantitative results indicated that solar wind does not have a significant influence on TEC variability. The final TEC simulation model developed makes use of the NN technique to find the relationship between historical TEC data variations and factors that are known to influence TEC variability (such as solar and magnetic activities, diurnal and seasonal variations and the geographical locations of the respective GPS stations) for the purposes of regional TEC modelling and mapping. The NN technique in conjunction with interpolation and extrapolation methods makes it possible to construct ionospheric TEC maps and to analyse the spatial and temporal TEC behaviour over Southern Africa. For independent validation, modelled TEC values were compared to ionosonde TEC and the International Reference Ionosphere (IRI) generated TEC values during both quiet and disturbed conditions. This thesis provides a comprehensive guide on the development of TEC models for predicting ionospheric variability over the South African region, and forms a significant contribution to ionospheric modelling efforts in Africa.
- Full Text:
- Date Issued: 2010
- Authors: Habarulema, John Bosco
- Date: 2010
- Subjects: Electrons -- Mathematical models Radio wave propagation Global positioning system -- Measurement Ionospheric radio wave propagation Atmospheric physics -- Africa, Southern
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5456 , http://hdl.handle.net/10962/d1005241
- Description: Modelling ionospheric total electron content (TEC) is an important area of interest for radio wave propagation, geodesy, surveying, the understanding of space weather dynamics and error correction in relation to Global Navigation Satellite Systems (GNNS) applications. With the utilisation of improved ionosonde technology coupled with the use of GNSS, the response of technological systems due to changes in the ionosphere during both quiet and disturbed conditions can be historically inferred. TEC values are usually derived from GNSS measurements using mathematically intensive algorithms. However, the techniques used to estimate these TEC values depend heavily on the availability of near-real time GNSS data, and therefore, are sometimes unable to generate complete datasets. This thesis investigated possibilities for the modelling of TEC values derived from the South African Global Positioning System (GPS)receiver network using linear regression methods and artificial neural networks (NNs). GPS TEC values were derived using the Adjusted Spherical Harmonic Analysis (ASHA) algorithm. Considering TEC and the factors that influence its variability as “dependent and independent variables” respectively, the capabilities of linear regression methods and NNs for TEC modelling were first investigated using a small dataset from two GPS receiver stations. NN and regression models were separately developed and used to reproduce TEC fluctuations at different stations not included in the models’ development. For this purpose, TEC was modelled as a function of diurnal variation, seasonal variation, solar and magnetic activities. Comparative analysis showed that NN models provide predictions of GPS TEC that were an improvement on those predicted by the regression models developed. A separate study to empirically investigate the effects of solar wind on GPS TEC was carried out. Quantitative results indicated that solar wind does not have a significant influence on TEC variability. The final TEC simulation model developed makes use of the NN technique to find the relationship between historical TEC data variations and factors that are known to influence TEC variability (such as solar and magnetic activities, diurnal and seasonal variations and the geographical locations of the respective GPS stations) for the purposes of regional TEC modelling and mapping. The NN technique in conjunction with interpolation and extrapolation methods makes it possible to construct ionospheric TEC maps and to analyse the spatial and temporal TEC behaviour over Southern Africa. For independent validation, modelled TEC values were compared to ionosonde TEC and the International Reference Ionosphere (IRI) generated TEC values during both quiet and disturbed conditions. This thesis provides a comprehensive guide on the development of TEC models for predicting ionospheric variability over the South African region, and forms a significant contribution to ionospheric modelling efforts in Africa.
- Full Text:
- Date Issued: 2010
A critical analysis of child labour and human resource development in Uganda
- Authors: Kibukamusoke, Martha
- Date: 2010
- Subjects: Child labor -- Uganda , Child soldiers -- Uganda
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:16128 , http://hdl.handle.net/10948/1196 , Child labor -- Uganda , Child soldiers -- Uganda
- Description: This study is a critical analysis of child labour and human resource development in Uganda. The study was undertaken because of the growing concern about child-labour practices in African countries, Uganda being an example. The incidence of child labour and the form that it takes are driven by supply-anddemand factors countrywide, but also by the sheer need of children to survive. Child labour is considered to be a fundamental child development problem. Children are involved in a number of child-labour practices such as prostitution in the commercial and tourism sex industry, forced begging on the streets, and forced soldiering. They may be used as camel jockeys, domestic servants, farm labourers/herders, mine labourers, produce porters, roadside sellers/street vendors, sweetshop-industry labourers, cooks and porters for rebels. The persistent exploitation of children involved in hazardous work and conditions has become overwhelming in Uganda. Poverty as one of the major causes for the growing numbers of child labourers in the agricultural sector in Uganda has caused a number of children to engage in child-labour activities to earn extra income for household survival. Many children have opted for partial attendance in school, eventually dropping out. Parents have also frequently influenced children to work on family farms, thus contributing to the children dropping out of school. Child-labour practices have become entrenched in the social and moral fabric of Ugandan society, and for this reason, research endeavours to uncover ways and methods to reverse this situation. The main objectives of this research were to establish the impact of poverty on child labour, to assess the effect of the social and cultural setup on child labour, to find out the impact of child-labour legislation enforcement, to determine the 5 influence of the HIV and AIDS pandemic on child labour, to establish the effect of the educational system and technological advancement on child labour, to establish the level of awareness of human rights in the community, and to establish the impact of human rights activists on the prevention of child labour. The study was undertaken in Masindi District in Budongo Sub County, in three parishes, Nyabyeya, Nyantonzi and Kasongoire. The respondents used for the study included child labourers, their parents, farmers, and community leaders. The method used to get to the sample was purposive sampling. Data was collected using questionnaires for written answers and a tape recorder for oral answers. Both primary and secondary data was collected, verified, edited, checked, coded, analysed, and then exported to Excel and SPSS. Collecting the data was a challenging exercise for the researcher. Experiences were varied, in the hospitality and willingness of respondents to learn more about child issues. Although respondents were willing to participate in the data collection exercise, social and cultural values did not permit all of them to share their views with the researcher. To collect data from respondents, the researcher had to ensure that remuneration was in place at the end of the exercise. The respondents filled out the questionnaires only after learning of the availability of a reward for every questionnaire answered. More setbacks were the need to travel long distances, and enduring the poor infrastructure, poor sanitation, and epidemic outbreaks, some of which diluted the quality of data collected. During group interviews, most parents were not entirely truthful about involving their children in child-labour activities. Although most respondents had an idea of what child labour is, their ignorance levels on the topic prevented them from stopping their children from working. The major findings of the research were that the cultural, social and economic setup of the community in the study area favoured child labour, although the child-labour legislation is against using children as labourers. Various ethnicities 6 in the study area considered a person between the ages of 5 and 12 years to be a child, yet the Constitution of Uganda dictates the age of childhood to be below 18 years. This causes conflict in the definition of who a child is. Although parents were aware of the Universal Primary Education (UPE) regulation penalties for not taking children to school, they still permitted children to engage in child-labour activities, and little has been done by government to curb the culprits. Awareness of the Sub Counties and Credit Co-operatives (SACCOs) and their implementation has not helped to reduce poverty in the area studied, resulting in an increased school dropout rate among school-going-age children, as well as more child-labour activities. The major conclusion of the study was that little has been done to increase the awareness levels of the teachers, parents and their children about child labour and its legislation, their knowledge of and involvement in micro-finance institutions in the community, and the availability of vocational training institutions. Little has therefore been done to reduce child-labour activities, improve the economic status of the community, and improve their human resource skills. The major recommendations of the research to the study are that culture should not override the Constitution as far as the definition of age limit is concerned. The government should carry out stakeholder analyses, and implement a life-skills and sensitisation programme in order to improve child participation in the Universal Primary Education (UPE) programme. Government should ensure that the society is given information about basic accounting, project planning and management skills, in order to be effectively involved in the economic programmes of SACCOs.
- Full Text:
- Date Issued: 2010
- Authors: Kibukamusoke, Martha
- Date: 2010
- Subjects: Child labor -- Uganda , Child soldiers -- Uganda
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:16128 , http://hdl.handle.net/10948/1196 , Child labor -- Uganda , Child soldiers -- Uganda
- Description: This study is a critical analysis of child labour and human resource development in Uganda. The study was undertaken because of the growing concern about child-labour practices in African countries, Uganda being an example. The incidence of child labour and the form that it takes are driven by supply-anddemand factors countrywide, but also by the sheer need of children to survive. Child labour is considered to be a fundamental child development problem. Children are involved in a number of child-labour practices such as prostitution in the commercial and tourism sex industry, forced begging on the streets, and forced soldiering. They may be used as camel jockeys, domestic servants, farm labourers/herders, mine labourers, produce porters, roadside sellers/street vendors, sweetshop-industry labourers, cooks and porters for rebels. The persistent exploitation of children involved in hazardous work and conditions has become overwhelming in Uganda. Poverty as one of the major causes for the growing numbers of child labourers in the agricultural sector in Uganda has caused a number of children to engage in child-labour activities to earn extra income for household survival. Many children have opted for partial attendance in school, eventually dropping out. Parents have also frequently influenced children to work on family farms, thus contributing to the children dropping out of school. Child-labour practices have become entrenched in the social and moral fabric of Ugandan society, and for this reason, research endeavours to uncover ways and methods to reverse this situation. The main objectives of this research were to establish the impact of poverty on child labour, to assess the effect of the social and cultural setup on child labour, to find out the impact of child-labour legislation enforcement, to determine the 5 influence of the HIV and AIDS pandemic on child labour, to establish the effect of the educational system and technological advancement on child labour, to establish the level of awareness of human rights in the community, and to establish the impact of human rights activists on the prevention of child labour. The study was undertaken in Masindi District in Budongo Sub County, in three parishes, Nyabyeya, Nyantonzi and Kasongoire. The respondents used for the study included child labourers, their parents, farmers, and community leaders. The method used to get to the sample was purposive sampling. Data was collected using questionnaires for written answers and a tape recorder for oral answers. Both primary and secondary data was collected, verified, edited, checked, coded, analysed, and then exported to Excel and SPSS. Collecting the data was a challenging exercise for the researcher. Experiences were varied, in the hospitality and willingness of respondents to learn more about child issues. Although respondents were willing to participate in the data collection exercise, social and cultural values did not permit all of them to share their views with the researcher. To collect data from respondents, the researcher had to ensure that remuneration was in place at the end of the exercise. The respondents filled out the questionnaires only after learning of the availability of a reward for every questionnaire answered. More setbacks were the need to travel long distances, and enduring the poor infrastructure, poor sanitation, and epidemic outbreaks, some of which diluted the quality of data collected. During group interviews, most parents were not entirely truthful about involving their children in child-labour activities. Although most respondents had an idea of what child labour is, their ignorance levels on the topic prevented them from stopping their children from working. The major findings of the research were that the cultural, social and economic setup of the community in the study area favoured child labour, although the child-labour legislation is against using children as labourers. Various ethnicities 6 in the study area considered a person between the ages of 5 and 12 years to be a child, yet the Constitution of Uganda dictates the age of childhood to be below 18 years. This causes conflict in the definition of who a child is. Although parents were aware of the Universal Primary Education (UPE) regulation penalties for not taking children to school, they still permitted children to engage in child-labour activities, and little has been done by government to curb the culprits. Awareness of the Sub Counties and Credit Co-operatives (SACCOs) and their implementation has not helped to reduce poverty in the area studied, resulting in an increased school dropout rate among school-going-age children, as well as more child-labour activities. The major conclusion of the study was that little has been done to increase the awareness levels of the teachers, parents and their children about child labour and its legislation, their knowledge of and involvement in micro-finance institutions in the community, and the availability of vocational training institutions. Little has therefore been done to reduce child-labour activities, improve the economic status of the community, and improve their human resource skills. The major recommendations of the research to the study are that culture should not override the Constitution as far as the definition of age limit is concerned. The government should carry out stakeholder analyses, and implement a life-skills and sensitisation programme in order to improve child participation in the Universal Primary Education (UPE) programme. Government should ensure that the society is given information about basic accounting, project planning and management skills, in order to be effectively involved in the economic programmes of SACCOs.
- Full Text:
- Date Issued: 2010
A critical analysis of discourses constructing portfolio assessment practices in three Eastern Cape schools
- Authors: Jones, Barbara Ellen
- Date: 2010
- Subjects: Discourse analysis -- South Africa -- Eastern Cape -- Case studies Competency-based education -- South Africa -- Eastern Cape -- Case studies Educational tests and measurements -- South Africa -- Eastern Cape -- Case studies Education -- Evaluation -- South Africa -- Eastern Cape -- Case studies Curriculum evaluation -- South Africa -- Eastern Cape -- Case studies
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1468 , http://hdl.handle.net/10962/d1003349
- Description: In 1998, South Africa introduced outcomes-based education to affect the shifts in pedagogy considered necessary following the move to democracy in 1994. Across the globe, the use of the portfolio to assess learners is increasingly being promoted as a form of progressive pedagogy. Hence, its adoption by the country as a new form of assessment practice was warranted. However, how the portfolio is constructed and perceived by educators within the classroom can become problematic in practice. This was apparent in the South African context and justifies research into how the portfolio is constructed as an assessment method in educational policy and by educators in the classrooms. The Curriculum Guide Directive text and the transcripts of twenty-one interviews carried out in three Eastern Cape schools served as the source of data for this study. Discourses make up a powerful framework of spoken, written and symbolic texts of institutional bureaucracies. Within these institutions human subjects are defined and constructed. Therefore, discourse construction acts as institutional forms of knowledge which can exude power over the individual if not made transparent. I used critical discourse analysis to uncover the discourses that were embedded within the Curriculum Guide Directive and to identify the discourses entrenched within the educators’ perceptions of the portfolio. The discourses in the Curriculum Guide Directive suggest the construction of the portfolio as a method of surveillance to track whether the educators are preparing learners for the school leaving examination and instructing the educators to provide evidence in the form of a portfolio. Analysis of the transcripts of the twenty one interviews with educators from three schools in the Eastern Cape indicated that the portfolio was not seen as a form of assessment by the educators, but as a form of discipline put in place by the Department of Education to ensure that they are preparing the learners for the school leaving examination and are able to produce proof of this preparation in the form of a portfolio. The discourses from the research highlighted that the school leaving examination is hegemonised into South African educational pedagogy as a form of traditional assessment and is not challenged even when it is no longer bringing about the dominant ideological goals. The portfolio was not seen as an assessment method by the educators nor represented as such in the Curriculum Guide Directive. Therefore, the job of the portfolio became that of a policing tool. Thus, a school curriculum which has been introduced with the intent of furthering social justice can become exclusive in practice, even with the best intentions.
- Full Text:
- Date Issued: 2010
- Authors: Jones, Barbara Ellen
- Date: 2010
- Subjects: Discourse analysis -- South Africa -- Eastern Cape -- Case studies Competency-based education -- South Africa -- Eastern Cape -- Case studies Educational tests and measurements -- South Africa -- Eastern Cape -- Case studies Education -- Evaluation -- South Africa -- Eastern Cape -- Case studies Curriculum evaluation -- South Africa -- Eastern Cape -- Case studies
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1468 , http://hdl.handle.net/10962/d1003349
- Description: In 1998, South Africa introduced outcomes-based education to affect the shifts in pedagogy considered necessary following the move to democracy in 1994. Across the globe, the use of the portfolio to assess learners is increasingly being promoted as a form of progressive pedagogy. Hence, its adoption by the country as a new form of assessment practice was warranted. However, how the portfolio is constructed and perceived by educators within the classroom can become problematic in practice. This was apparent in the South African context and justifies research into how the portfolio is constructed as an assessment method in educational policy and by educators in the classrooms. The Curriculum Guide Directive text and the transcripts of twenty-one interviews carried out in three Eastern Cape schools served as the source of data for this study. Discourses make up a powerful framework of spoken, written and symbolic texts of institutional bureaucracies. Within these institutions human subjects are defined and constructed. Therefore, discourse construction acts as institutional forms of knowledge which can exude power over the individual if not made transparent. I used critical discourse analysis to uncover the discourses that were embedded within the Curriculum Guide Directive and to identify the discourses entrenched within the educators’ perceptions of the portfolio. The discourses in the Curriculum Guide Directive suggest the construction of the portfolio as a method of surveillance to track whether the educators are preparing learners for the school leaving examination and instructing the educators to provide evidence in the form of a portfolio. Analysis of the transcripts of the twenty one interviews with educators from three schools in the Eastern Cape indicated that the portfolio was not seen as a form of assessment by the educators, but as a form of discipline put in place by the Department of Education to ensure that they are preparing the learners for the school leaving examination and are able to produce proof of this preparation in the form of a portfolio. The discourses from the research highlighted that the school leaving examination is hegemonised into South African educational pedagogy as a form of traditional assessment and is not challenged even when it is no longer bringing about the dominant ideological goals. The portfolio was not seen as an assessment method by the educators nor represented as such in the Curriculum Guide Directive. Therefore, the job of the portfolio became that of a policing tool. Thus, a school curriculum which has been introduced with the intent of furthering social justice can become exclusive in practice, even with the best intentions.
- Full Text:
- Date Issued: 2010
A critical analysis of service quality perceptions of vehicle repair and maintenance retailers
- Authors: Whitlock, Wayne Ronald
- Date: 2010
- Subjects: Customer services -- South Africa -- Evaluation , Motor vehicles -- South Africa -- Maintenance and repairs
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8610 , http://hdl.handle.net/10948/1516 , Customer services -- South Africa -- Evaluation , Motor vehicles -- South Africa -- Maintenance and repairs
- Description: The South African motor industry plays a pivotal role in the economy of South Africa and is a leading indicator in economic change. In general, satisfaction of customer service in the motor industry is steadily improving. However, as research has shown, there is still room for improvement within the industry. Knowing what customers expect is a critical step in delivering good quality service to ensure customer retention in the long-term (Zeithaml, Parasuraman & Berry 1990:62-63). Having a good understanding of the value of forming long-term relationships with customers and their evaluation of the quality of the service provided, cannot be underestimated, as failure to actually ask customers what they think of the service could be detrimental in the long-term. Vehicle manufacturers conduct ongoing research to monitor customer perceptions of the quality of the service provided by their vehicle retailers. The information generated from the research findings can be used by manufacturers to improve levels of service where this appears to be lacking, and deal promptly with any customer complaints. Against this background, how vehicle owners judge the quality of the service provided by a franchised vehicle retailer for a repair and maintenance service, will be crucial to understanding how customers form perceptions of service related firms specifically, and in general, even an entire industry. The primary objective of this study is to assess customer perceptions of service quality with a franchised vehicle retailer following a routine repair and maintenance service. The sample consisted of 3 859 respondents who had their vehicles serviced at a GM South Africa franchised vehicle retailer over a one month period. The empirical results of the study revealed that GM South Africa show general positive results in terms of customer service satisfaction, however, there are some areas where additional attention is required.
- Full Text:
- Date Issued: 2010
- Authors: Whitlock, Wayne Ronald
- Date: 2010
- Subjects: Customer services -- South Africa -- Evaluation , Motor vehicles -- South Africa -- Maintenance and repairs
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8610 , http://hdl.handle.net/10948/1516 , Customer services -- South Africa -- Evaluation , Motor vehicles -- South Africa -- Maintenance and repairs
- Description: The South African motor industry plays a pivotal role in the economy of South Africa and is a leading indicator in economic change. In general, satisfaction of customer service in the motor industry is steadily improving. However, as research has shown, there is still room for improvement within the industry. Knowing what customers expect is a critical step in delivering good quality service to ensure customer retention in the long-term (Zeithaml, Parasuraman & Berry 1990:62-63). Having a good understanding of the value of forming long-term relationships with customers and their evaluation of the quality of the service provided, cannot be underestimated, as failure to actually ask customers what they think of the service could be detrimental in the long-term. Vehicle manufacturers conduct ongoing research to monitor customer perceptions of the quality of the service provided by their vehicle retailers. The information generated from the research findings can be used by manufacturers to improve levels of service where this appears to be lacking, and deal promptly with any customer complaints. Against this background, how vehicle owners judge the quality of the service provided by a franchised vehicle retailer for a repair and maintenance service, will be crucial to understanding how customers form perceptions of service related firms specifically, and in general, even an entire industry. The primary objective of this study is to assess customer perceptions of service quality with a franchised vehicle retailer following a routine repair and maintenance service. The sample consisted of 3 859 respondents who had their vehicles serviced at a GM South Africa franchised vehicle retailer over a one month period. The empirical results of the study revealed that GM South Africa show general positive results in terms of customer service satisfaction, however, there are some areas where additional attention is required.
- Full Text:
- Date Issued: 2010
A critical analysis of the distintion between mining and manufacturing for South African income tax purposes
- Authors: Cloete, Loriaan
- Date: 2010
- Subjects: Mining corporations -- South Africa , Income tax -- South Africa , Income tax -- Law and legislation -- South Africa , Mining law -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8948 , http://hdl.handle.net/10948/1344 , Mining corporations -- South Africa , Income tax -- South Africa , Income tax -- Law and legislation -- South Africa , Mining law -- South Africa
- Description: "Mining operations" and "mining" are defined in s 1 of the Income Tax Act (ITA). A concept that is of great significance to this definition is the matter of when a mineral is won and the related question of when does the mining process end and the process of manufacture commences. Case law has not established a definitive point that can be used by the mining taxpayer to determine where the mining process ends for income tax purposes. The Supreme Court of Appeal was presented with the perfect opportunity in the Foskor1 case to clearly define the boundaries between these processes. Unfortunately, the court did not seize this opportunity to provide legal certainty. The significance of the distinction lies in the fact that a mining taxpayer is allowed to claim accelerated capital allowances. The objective of these allowances is to provide tax relief to the mining taxpayer taking the immense risk of investing billions of rands in capital expenditure. The capital expenditure incurred will also result in direct foreign investment. This in turn will result in economic growth and job creation. Currently, there is no legal certainty as to which processes will qualify as mining operations for income tax purposes. This may result in mining taxpayers being hesitant to incur capital expenditure as the risk relating to a project would have increased. The accelerated capital allowances may therefore not serve their intended purpose. The gross domestic product (GDP) contribution from gold mining has been decreasing in the last number of years, but this decrease has to a large extent been offset by an increase in the downstream or beneficiated minerals industry. This industry has also been identified by Government as a growth sector. The downstream or beneficiated mineral industry may not be catered for in the current definition of "mining operations" and "mining" and may therefore not qualify for beneficial tax allowances. It is therefore proposed that the term "won" as used in the definition of "mining operations" and "mining" should be defined in s 1 of the ITA as follows: A mineral is "won" when all the requisite and necessary processes, including, amongst other things, refinement, beneficiation, smelting, separation, have been undertaken to the mineral to render it saleable in an open and general market. This extension will provide legal certainty to a mining taxpayer and will ensure that South Africa obtains direct foreign investment and maximum value for its minerals. This will contribute to economic growth for South Africa's developing economy and result in job creation.
- Full Text:
- Date Issued: 2010
- Authors: Cloete, Loriaan
- Date: 2010
- Subjects: Mining corporations -- South Africa , Income tax -- South Africa , Income tax -- Law and legislation -- South Africa , Mining law -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8948 , http://hdl.handle.net/10948/1344 , Mining corporations -- South Africa , Income tax -- South Africa , Income tax -- Law and legislation -- South Africa , Mining law -- South Africa
- Description: "Mining operations" and "mining" are defined in s 1 of the Income Tax Act (ITA). A concept that is of great significance to this definition is the matter of when a mineral is won and the related question of when does the mining process end and the process of manufacture commences. Case law has not established a definitive point that can be used by the mining taxpayer to determine where the mining process ends for income tax purposes. The Supreme Court of Appeal was presented with the perfect opportunity in the Foskor1 case to clearly define the boundaries between these processes. Unfortunately, the court did not seize this opportunity to provide legal certainty. The significance of the distinction lies in the fact that a mining taxpayer is allowed to claim accelerated capital allowances. The objective of these allowances is to provide tax relief to the mining taxpayer taking the immense risk of investing billions of rands in capital expenditure. The capital expenditure incurred will also result in direct foreign investment. This in turn will result in economic growth and job creation. Currently, there is no legal certainty as to which processes will qualify as mining operations for income tax purposes. This may result in mining taxpayers being hesitant to incur capital expenditure as the risk relating to a project would have increased. The accelerated capital allowances may therefore not serve their intended purpose. The gross domestic product (GDP) contribution from gold mining has been decreasing in the last number of years, but this decrease has to a large extent been offset by an increase in the downstream or beneficiated minerals industry. This industry has also been identified by Government as a growth sector. The downstream or beneficiated mineral industry may not be catered for in the current definition of "mining operations" and "mining" and may therefore not qualify for beneficial tax allowances. It is therefore proposed that the term "won" as used in the definition of "mining operations" and "mining" should be defined in s 1 of the ITA as follows: A mineral is "won" when all the requisite and necessary processes, including, amongst other things, refinement, beneficiation, smelting, separation, have been undertaken to the mineral to render it saleable in an open and general market. This extension will provide legal certainty to a mining taxpayer and will ensure that South Africa obtains direct foreign investment and maximum value for its minerals. This will contribute to economic growth for South Africa's developing economy and result in job creation.
- Full Text:
- Date Issued: 2010
A critical analysis of the income tax implications of persons ceasing to be a resident of South Africa
- Authors: Loyson, Richard Michael
- Date: 2010
- Subjects: Income tax -- South Africa , Double taxation -- South Africa , Aliens -- Taxation -- South Africa , Capital gains tax -- South Africa , Citizenship -- South Africa , Emigration and immigration law -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8957 , http://hdl.handle.net/10948/1180 , Income tax -- South Africa , Double taxation -- South Africa , Aliens -- Taxation -- South Africa , Capital gains tax -- South Africa , Citizenship -- South Africa , Emigration and immigration law -- South Africa
- Description: Over the last 10 years the South African fiscus has introduced numerous changes to the Income Tax Act (ITA) which affect the income tax implications of persons ceasing to be a resident of South Africa. The two main changes were: - The introduction of a world-wide basis of taxation for residents - The introduction of capital gains tax (CGT) as part of the ITA The aim of this treatise was to identify the income tax implications of persons ceasing to be a resident of South Africa. Resulting from this research, several issues in the ITA have been identified, and the two major ones are summarised below. Firstly, upon the emigration of the taxpayer, there is a deemed disposal of a taxpayer’s assets in terms of paragraph 12 of the Eighth Schedule. It is submitted that the resulting exit tax may be unconstitutional for individuals. It is recommended that South Africa should adopt the deferral method within its domestic legislation for individuals who are emigrating. The deferral method postpones the liability until the disposal of the asset. Secondly, on the subsequent disposal of assets by former residents where there was no exit charge in terms of the exemption under paragraph 12(2)(a)(i) of the Eighth Schedule. Depending on the specific double tax agreement (DTA) that has been entered into with the foreign country, taxpayers have been given vii the opportunity to minimise or eliminate the tax liability with regard to certain assets. This should be of concern from the point of view of the South African government. Further issues noted in this treatise were the following: - It is submitted that the term ‘place of effective management’ has been incorrectly interpreted by SARS in Interpretation Note 6. - It is further submitted that the interpretation by SARS of paragraph 2(2) of the Eighth Schedule is technically incorrect. The above issues that have been identified present opportunities to emigrants to take advantage of the current tax legislation. It is further recommended that taxpayers who are emigrating need to consider the South African domestic tax law implications, respective DTA’s, as well as the domestic tax laws of the other jurisdiction, not only on the date of emigration but also on the subsequent disposal of the respective assets.
- Full Text:
- Date Issued: 2010
- Authors: Loyson, Richard Michael
- Date: 2010
- Subjects: Income tax -- South Africa , Double taxation -- South Africa , Aliens -- Taxation -- South Africa , Capital gains tax -- South Africa , Citizenship -- South Africa , Emigration and immigration law -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8957 , http://hdl.handle.net/10948/1180 , Income tax -- South Africa , Double taxation -- South Africa , Aliens -- Taxation -- South Africa , Capital gains tax -- South Africa , Citizenship -- South Africa , Emigration and immigration law -- South Africa
- Description: Over the last 10 years the South African fiscus has introduced numerous changes to the Income Tax Act (ITA) which affect the income tax implications of persons ceasing to be a resident of South Africa. The two main changes were: - The introduction of a world-wide basis of taxation for residents - The introduction of capital gains tax (CGT) as part of the ITA The aim of this treatise was to identify the income tax implications of persons ceasing to be a resident of South Africa. Resulting from this research, several issues in the ITA have been identified, and the two major ones are summarised below. Firstly, upon the emigration of the taxpayer, there is a deemed disposal of a taxpayer’s assets in terms of paragraph 12 of the Eighth Schedule. It is submitted that the resulting exit tax may be unconstitutional for individuals. It is recommended that South Africa should adopt the deferral method within its domestic legislation for individuals who are emigrating. The deferral method postpones the liability until the disposal of the asset. Secondly, on the subsequent disposal of assets by former residents where there was no exit charge in terms of the exemption under paragraph 12(2)(a)(i) of the Eighth Schedule. Depending on the specific double tax agreement (DTA) that has been entered into with the foreign country, taxpayers have been given vii the opportunity to minimise or eliminate the tax liability with regard to certain assets. This should be of concern from the point of view of the South African government. Further issues noted in this treatise were the following: - It is submitted that the term ‘place of effective management’ has been incorrectly interpreted by SARS in Interpretation Note 6. - It is further submitted that the interpretation by SARS of paragraph 2(2) of the Eighth Schedule is technically incorrect. The above issues that have been identified present opportunities to emigrants to take advantage of the current tax legislation. It is further recommended that taxpayers who are emigrating need to consider the South African domestic tax law implications, respective DTA’s, as well as the domestic tax laws of the other jurisdiction, not only on the date of emigration but also on the subsequent disposal of the respective assets.
- Full Text:
- Date Issued: 2010
A critical analysis of the South African automotive industry and government incentive policy
- Authors: Gaskin, Sean
- Date: 2010
- Subjects: Motor Industry Development Programme , Automobile industry and trade -- Government policy -- South Africa , Incentives in industry -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8656 , http://hdl.handle.net/10948/1358 , Motor Industry Development Programme , Automobile industry and trade -- Government policy -- South Africa , Incentives in industry -- South Africa
- Description: The automotive industry in South Africa exists in its current state due to the developmental programmes created by the South African government. During the next three years the government’s main development policy for the automotive industry will change from the Motor Industry Development Programme (MIDP) to the Automotive Production and Development Programme (APDP). As a result of this change there were feelings of uncertainty experienced across the domestic automotive industry during the APDP’s design and the period leading up to its launch, more or less years 2008 to 2010. Also present is the fear that the industry would collapse when faced with global competition should this change not fully comprehend all aspects of South Africa’s automotive industry. The research problem addressed in this study was to determine the effect on the sector’s competiveness in light of the impending change in governmental development programmes. This was accurately explained and expressed clearly while sub problems were identified from areas in the main problem that required further analysis due to their criticality or lack of clarity. A comprehensive literature review was executed to understand the nature and extent of the South African automotive industry, the Motor Industry Development Programme and the Automotive Production and Development Programme. A primary research instrument was constructed, in the form of a questionnaire, to test specific themes exposed during the literature review which can influence the sector’s competitive advantage. This questionnaire was distributed with the assistance of industry representative bodies NAAMSA (National Association of Automobile Manufacturers of South Africa, the domestic de facto representative body) and NAACAM (National Association of Automotive Component and Allied Manufacturers, a component manufacturers’ representative body), to an even spread of respondents representative of the senior management and executives of automotive companies in South Africa. From the results obtained from the sample group, it seemed that there was consensus on many issues regarding the current structure of the South African automotive industry. Specifically, the profitability of vehicle assemblers and component manufacturers is heavily iii influenced by the incentives offered under the MIDP and the industry is not viable without them. The respondents were virtually unanimous in indicating that there is a need for some form of incentive programme and were positive about the effect the MIDP has had thus far on the automotive industry of South Africa, particularly the effect on the structure, focus and encouraging a reduction in complexity. The research found that it is common practice for OEMs to include the import duty on vehicles imported for domestic consumption even though this duty will be paid with the use of import-duty rebate credit certificates (IRCCs), which are provided to those vehicle assemblers who are net exporters of vehicles. Looking to the future, it emerged that the APDP will have a similar, positive effect on the domestic automotive industry when compared to the MIDP, but the effect will be experienced in a more aggressive manner. Companies will be encouraged by the new development programme to more aggressively improve aspects such as restructuring, rationalising, reducing model proliferation and improving low scale economies for example. Also the APDP will encourage OEMs to increase plant production volumes and ensure that reasonable scale economies are present to develop a domestic component supply industry to a degree. However, the volumes will be insufficient to create a world-class supplier industry. As a result automotive companies will have to be more aggressive in their adoption of more automated production processes and through Automotive Investment Scheme capital investment will increase in both vehicle assemblers and component manufacturers. Component manufacturers indicated that they would invest more in the coming years under the APDP than previously while vehicle assemblers indicated that their investment levels will remain as before. While this is good for the industry, labour is somewhat left out of this: considering the APDP’s focus on increased volumes and capital investments automotive companies are not incentivised to make use of labour-absorbing production processes. The study also found that there is still a need for tariff protection and that the domestic industry would collapse in the face of global competition. The research found that the APDP was compliant with South Africa’s commitments to the World Trade Organisation. Finally, the Department of Trade and Industry’s goal of producing 1.2 million vehicles per annum by 2020 was revealed to be unrealistic and unreachable.
- Full Text:
- Date Issued: 2010
- Authors: Gaskin, Sean
- Date: 2010
- Subjects: Motor Industry Development Programme , Automobile industry and trade -- Government policy -- South Africa , Incentives in industry -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8656 , http://hdl.handle.net/10948/1358 , Motor Industry Development Programme , Automobile industry and trade -- Government policy -- South Africa , Incentives in industry -- South Africa
- Description: The automotive industry in South Africa exists in its current state due to the developmental programmes created by the South African government. During the next three years the government’s main development policy for the automotive industry will change from the Motor Industry Development Programme (MIDP) to the Automotive Production and Development Programme (APDP). As a result of this change there were feelings of uncertainty experienced across the domestic automotive industry during the APDP’s design and the period leading up to its launch, more or less years 2008 to 2010. Also present is the fear that the industry would collapse when faced with global competition should this change not fully comprehend all aspects of South Africa’s automotive industry. The research problem addressed in this study was to determine the effect on the sector’s competiveness in light of the impending change in governmental development programmes. This was accurately explained and expressed clearly while sub problems were identified from areas in the main problem that required further analysis due to their criticality or lack of clarity. A comprehensive literature review was executed to understand the nature and extent of the South African automotive industry, the Motor Industry Development Programme and the Automotive Production and Development Programme. A primary research instrument was constructed, in the form of a questionnaire, to test specific themes exposed during the literature review which can influence the sector’s competitive advantage. This questionnaire was distributed with the assistance of industry representative bodies NAAMSA (National Association of Automobile Manufacturers of South Africa, the domestic de facto representative body) and NAACAM (National Association of Automotive Component and Allied Manufacturers, a component manufacturers’ representative body), to an even spread of respondents representative of the senior management and executives of automotive companies in South Africa. From the results obtained from the sample group, it seemed that there was consensus on many issues regarding the current structure of the South African automotive industry. Specifically, the profitability of vehicle assemblers and component manufacturers is heavily iii influenced by the incentives offered under the MIDP and the industry is not viable without them. The respondents were virtually unanimous in indicating that there is a need for some form of incentive programme and were positive about the effect the MIDP has had thus far on the automotive industry of South Africa, particularly the effect on the structure, focus and encouraging a reduction in complexity. The research found that it is common practice for OEMs to include the import duty on vehicles imported for domestic consumption even though this duty will be paid with the use of import-duty rebate credit certificates (IRCCs), which are provided to those vehicle assemblers who are net exporters of vehicles. Looking to the future, it emerged that the APDP will have a similar, positive effect on the domestic automotive industry when compared to the MIDP, but the effect will be experienced in a more aggressive manner. Companies will be encouraged by the new development programme to more aggressively improve aspects such as restructuring, rationalising, reducing model proliferation and improving low scale economies for example. Also the APDP will encourage OEMs to increase plant production volumes and ensure that reasonable scale economies are present to develop a domestic component supply industry to a degree. However, the volumes will be insufficient to create a world-class supplier industry. As a result automotive companies will have to be more aggressive in their adoption of more automated production processes and through Automotive Investment Scheme capital investment will increase in both vehicle assemblers and component manufacturers. Component manufacturers indicated that they would invest more in the coming years under the APDP than previously while vehicle assemblers indicated that their investment levels will remain as before. While this is good for the industry, labour is somewhat left out of this: considering the APDP’s focus on increased volumes and capital investments automotive companies are not incentivised to make use of labour-absorbing production processes. The study also found that there is still a need for tariff protection and that the domestic industry would collapse in the face of global competition. The research found that the APDP was compliant with South Africa’s commitments to the World Trade Organisation. Finally, the Department of Trade and Industry’s goal of producing 1.2 million vehicles per annum by 2020 was revealed to be unrealistic and unreachable.
- Full Text:
- Date Issued: 2010
A critical discourse analysis of the coverage of operation "Restore Order" (Operation Murambatsvina) by Zimbabwe's weekly newspapers, the state-owned The Sunday Mail and the privately owned The Standard, in the period 18 May to 30 June 2005
- Authors: Mukundu, Rashweat
- Date: 2010
- Subjects: Operation Murambatsvina, Zimbabwe, 2005- Political persecution -- Zimbabwe Mass media -- Political aspects -- Zimbabwe Press and politics -- Zimbabwe Freedom of the press -- Zimbabwe Newspapers -- Objectivity -- Zimbabwe Journalistic ethics -- Zimbabwe Critical discourse analysis Sunday Mail (Zimbabwe) The Standard (Zimbabwe)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3470 , http://hdl.handle.net/10962/d1002925
- Description: On May 16 2006 the government of Zimbabwe embarked on a clean-up programme of urban centres, destroying informal human settlements and informal businesses. This operation, which the government called operation "Restore Order", resulted in the displacement of nearly one million people and left thousands of families homeless. This study is a discussion and an analysis of the coverage of the clean-up operation by two of Zimbabwe's leading Sunday newspapers, The Sunday Mail and The Standard. The Sunday Mail is owned by the Zimbabwe government and The Standard is privately owned and perceived to be oppositional to the current Zimbabwe government. The two newspapers, therefore, covered the clean-up operation from different perspectives and often presented conflicting reports explaining why the clean-up operation was carried out and the extent of its impact on the lives of millions of Zimbabweans. The chosen research approach is the Critical Discourse Analysis (CDA) framework as developed by Fairclough (1995). Using CDA, this study seeks to find out and expose the underlying ideological struggles for hegemony between different social and political groups in Zimbabwe and how the newspapers became actors in this process. This process is made possible by looking at how news reporting is organised in the two newspapers, issues of language use, sourcing and external factors that influenced the coverage of the operation.
- Full Text:
- Date Issued: 2010
- Authors: Mukundu, Rashweat
- Date: 2010
- Subjects: Operation Murambatsvina, Zimbabwe, 2005- Political persecution -- Zimbabwe Mass media -- Political aspects -- Zimbabwe Press and politics -- Zimbabwe Freedom of the press -- Zimbabwe Newspapers -- Objectivity -- Zimbabwe Journalistic ethics -- Zimbabwe Critical discourse analysis Sunday Mail (Zimbabwe) The Standard (Zimbabwe)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3470 , http://hdl.handle.net/10962/d1002925
- Description: On May 16 2006 the government of Zimbabwe embarked on a clean-up programme of urban centres, destroying informal human settlements and informal businesses. This operation, which the government called operation "Restore Order", resulted in the displacement of nearly one million people and left thousands of families homeless. This study is a discussion and an analysis of the coverage of the clean-up operation by two of Zimbabwe's leading Sunday newspapers, The Sunday Mail and The Standard. The Sunday Mail is owned by the Zimbabwe government and The Standard is privately owned and perceived to be oppositional to the current Zimbabwe government. The two newspapers, therefore, covered the clean-up operation from different perspectives and often presented conflicting reports explaining why the clean-up operation was carried out and the extent of its impact on the lives of millions of Zimbabweans. The chosen research approach is the Critical Discourse Analysis (CDA) framework as developed by Fairclough (1995). Using CDA, this study seeks to find out and expose the underlying ideological struggles for hegemony between different social and political groups in Zimbabwe and how the newspapers became actors in this process. This process is made possible by looking at how news reporting is organised in the two newspapers, issues of language use, sourcing and external factors that influenced the coverage of the operation.
- Full Text:
- Date Issued: 2010
A critical investigation of the interpretation and implementation of the Parzival main lesson within the context of the Waldorf curriculum : a multiple case study
- Authors: Swanepoel, Elizabeth
- Date: 2010
- Subjects: Waldorf method of education Education -- Philosophy Teaching -- South Africa Perceval (Legendary character) Perceval (Legendary character) -- Study and teaching Grail Legends -- Study and teaching
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1483 , http://hdl.handle.net/10962/d1003364
- Description: The Steiner/Waldorf school movement is currently one of the fastest growing independent school movements internationally. In several countries it seems to have developed into the most popular form of alternative education. South Africa has 17 Waldorf schools and one full-time teacher training facility. This study investigated the interpretation and implementation of the Parzival main lesson within the wider context of the Waldorf curriculum. The main lesson system is an essential constituent of the Waldorf curriculum. Most academic subjects in a Waldorf school are taught in a three- or four-week main lesson block. The main lesson occupies the first two hours of the school day. A main lesson consists of a particular three-part structure, and the main lesson book is the keystone to the Waldorf evaluative process. The Parzival main lesson is specifically taught in Class 11, and most Waldorf schools consider it as one of the most important main lessons in the high school. The interpretivist model was ideally suited to this research. The investigation was conducted as a multiple case study, and the main source of data was provided by classroom observation. This was supported by interviews and classroom artifacts. The study involved two South African Waldorf schools at which the Parzival main lesson is taught. This main lesson is presented at only three South African Waldorf schools. I teach at the remaining school, and therefore conducted my research at the other two schools. The teachers who facilitated the Parzival main lesson, as well as the Class students at the selected schools voluntarily participated in the research. My research findings indicate that the possibility exists for the teacher to exercise a certain degree of freedom and creativity within the parameters of Waldorf methodology and the Waldorf curriculum. The study also determines that teachers often find it difficult to integrate the three-part structure, as indicated by Waldorf methodology, in a single main lesson. Furthermore, my research establishes that main lesson books can indeed serve as both text and as an assessment tool. I therefore conclude and maintain in this study, with particular reference to the Parzival main lesson, that despite the prescriptive structure of the Waldorf system and Steiner pedagogy, teachers need not necessarily sacrifice their freedom and creativity within the classroom.
- Full Text:
- Date Issued: 2010
- Authors: Swanepoel, Elizabeth
- Date: 2010
- Subjects: Waldorf method of education Education -- Philosophy Teaching -- South Africa Perceval (Legendary character) Perceval (Legendary character) -- Study and teaching Grail Legends -- Study and teaching
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1483 , http://hdl.handle.net/10962/d1003364
- Description: The Steiner/Waldorf school movement is currently one of the fastest growing independent school movements internationally. In several countries it seems to have developed into the most popular form of alternative education. South Africa has 17 Waldorf schools and one full-time teacher training facility. This study investigated the interpretation and implementation of the Parzival main lesson within the wider context of the Waldorf curriculum. The main lesson system is an essential constituent of the Waldorf curriculum. Most academic subjects in a Waldorf school are taught in a three- or four-week main lesson block. The main lesson occupies the first two hours of the school day. A main lesson consists of a particular three-part structure, and the main lesson book is the keystone to the Waldorf evaluative process. The Parzival main lesson is specifically taught in Class 11, and most Waldorf schools consider it as one of the most important main lessons in the high school. The interpretivist model was ideally suited to this research. The investigation was conducted as a multiple case study, and the main source of data was provided by classroom observation. This was supported by interviews and classroom artifacts. The study involved two South African Waldorf schools at which the Parzival main lesson is taught. This main lesson is presented at only three South African Waldorf schools. I teach at the remaining school, and therefore conducted my research at the other two schools. The teachers who facilitated the Parzival main lesson, as well as the Class students at the selected schools voluntarily participated in the research. My research findings indicate that the possibility exists for the teacher to exercise a certain degree of freedom and creativity within the parameters of Waldorf methodology and the Waldorf curriculum. The study also determines that teachers often find it difficult to integrate the three-part structure, as indicated by Waldorf methodology, in a single main lesson. Furthermore, my research establishes that main lesson books can indeed serve as both text and as an assessment tool. I therefore conclude and maintain in this study, with particular reference to the Parzival main lesson, that despite the prescriptive structure of the Waldorf system and Steiner pedagogy, teachers need not necessarily sacrifice their freedom and creativity within the classroom.
- Full Text:
- Date Issued: 2010
A decade later: follow-up review of South African research on the consequences of and contributory factors in teen-aged pregnancy
- Macleod, Catriona I, Tracey, Tiffany
- Authors: Macleod, Catriona I , Tracey, Tiffany
- Date: 2010
- Language: English
- Type: Article
- Identifier: vital:6276 , http://hdl.handle.net/10962/d1008276 , http://journals.sagepub.com/doi/abs/10.1177/008124631004000103
- Description: In this paper, we review South African research conducted in the last 10 years on the consequences of and contributory factors in teen-aged pregnancy. We discuss research into the rates of teen-aged pregnancy, the intentionality and wantedness of pregnancy, the disruption of schooling, health issues, consequences for the children, welfare concerns, knowledge and use of contraception, timing of sexual debut, age of partner, coercive sexual relations, cultural factors and health service provision. We compare this discussion to the reviews on the same topic appearing in the South African Journal of Psychology a decade ago. We find that there are several changes in focus in the research on pregnancy amongst young women. We conclude that, in general, there has been an improvement in the breadth of data available, mostly as a result of representative national and local surveys. A better teasing out of nuances around particular issues and a grappling with theoretical issues are also evident in recent research.
- Full Text:
- Date Issued: 2010
- Authors: Macleod, Catriona I , Tracey, Tiffany
- Date: 2010
- Language: English
- Type: Article
- Identifier: vital:6276 , http://hdl.handle.net/10962/d1008276 , http://journals.sagepub.com/doi/abs/10.1177/008124631004000103
- Description: In this paper, we review South African research conducted in the last 10 years on the consequences of and contributory factors in teen-aged pregnancy. We discuss research into the rates of teen-aged pregnancy, the intentionality and wantedness of pregnancy, the disruption of schooling, health issues, consequences for the children, welfare concerns, knowledge and use of contraception, timing of sexual debut, age of partner, coercive sexual relations, cultural factors and health service provision. We compare this discussion to the reviews on the same topic appearing in the South African Journal of Psychology a decade ago. We find that there are several changes in focus in the research on pregnancy amongst young women. We conclude that, in general, there has been an improvement in the breadth of data available, mostly as a result of representative national and local surveys. A better teasing out of nuances around particular issues and a grappling with theoretical issues are also evident in recent research.
- Full Text:
- Date Issued: 2010
A Foucauldian critique of neo-liberalsim
- Authors: Sachikonye, Tawanda
- Date: 2010
- Subjects: Neoliberalism Political science -- Philosophy Philosophy, Marxist Foucault, Michel, 1926-1984 Socialism Capitalism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2828 , http://hdl.handle.net/10962/d1003038
- Description: This study attempts to make a contribution to the critique of contemporary capitalism. This has been conceptualised through a Foucauldian critique of neo-liberalism, that is, Foucault’s concepts of power and governmentality have been used to criticise neo-liberalism. The study argues that neo-liberalism is a hegemonic and oppressive politico-economic social system. This has occurred in two ways; firstly, neo-liberalism came to dominate the global economy and, secondly, neo-liberalism has become the dominant politico-economic discourse. An attempt is made to expose the discourses and institutions that buttress the neo-liberal project by undertaking a Foucauldian critique. According to Foucault, knowledge shapes the social space through its ‘mechanisms’, discourses and institutions. In order to critique neo-liberalism, it is necessary to expose its power-knowledge base, which is what gives it legitimacy. By analysing and exposing neo-liberalism’s power-knowledge base, its oppression becomes clear through an observation of the material effects of neo-liberal ideology and policy. This study also evaluates to what extent Marxism is a viable alternative to neo-liberalism, in order to ascertain what Foucault adds to already existing critiques of capitalism, and neo-liberalism, in particular. It concludes by arguing that even though Marxism provides a useful framework in which to understand neo-liberal domination, its labour based social theory is somewhat outdated in our contemporary age of the information society. Therefore, it is Foucault’s concept of power-knowledge that is most pertinent in providing an effective critical theory of neo-liberalism in the age of the information society, as it focuses on the primacy of power-knowledge in matters of domination.
- Full Text:
- Date Issued: 2010
- Authors: Sachikonye, Tawanda
- Date: 2010
- Subjects: Neoliberalism Political science -- Philosophy Philosophy, Marxist Foucault, Michel, 1926-1984 Socialism Capitalism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2828 , http://hdl.handle.net/10962/d1003038
- Description: This study attempts to make a contribution to the critique of contemporary capitalism. This has been conceptualised through a Foucauldian critique of neo-liberalism, that is, Foucault’s concepts of power and governmentality have been used to criticise neo-liberalism. The study argues that neo-liberalism is a hegemonic and oppressive politico-economic social system. This has occurred in two ways; firstly, neo-liberalism came to dominate the global economy and, secondly, neo-liberalism has become the dominant politico-economic discourse. An attempt is made to expose the discourses and institutions that buttress the neo-liberal project by undertaking a Foucauldian critique. According to Foucault, knowledge shapes the social space through its ‘mechanisms’, discourses and institutions. In order to critique neo-liberalism, it is necessary to expose its power-knowledge base, which is what gives it legitimacy. By analysing and exposing neo-liberalism’s power-knowledge base, its oppression becomes clear through an observation of the material effects of neo-liberal ideology and policy. This study also evaluates to what extent Marxism is a viable alternative to neo-liberalism, in order to ascertain what Foucault adds to already existing critiques of capitalism, and neo-liberalism, in particular. It concludes by arguing that even though Marxism provides a useful framework in which to understand neo-liberal domination, its labour based social theory is somewhat outdated in our contemporary age of the information society. Therefore, it is Foucault’s concept of power-knowledge that is most pertinent in providing an effective critical theory of neo-liberalism in the age of the information society, as it focuses on the primacy of power-knowledge in matters of domination.
- Full Text:
- Date Issued: 2010
A framework for mobile SOA using compression
- Authors: Saunders, Evan
- Date: 2010
- Subjects: Service-oriented architecture (Computer science)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10459 , http://hdl.handle.net/10948/1500 , Service-oriented architecture (Computer science)
- Description: The widely accepted standards of Service-Oriented Architecture (SOA) have changed the way many organisations conduct their everyday business. The significant popularity of mobile devices has seen a rapid increase in the rate of mobile technology enhancements, which have become widely used for communication, as well as conducting everyday tasks. An increased requirement in many businesses is for staff not to be tied down to the office. Consequently, mobile devices play an important role in achieving the mobility and information access that people desire. Due to the popularity and increasing use of SOA and mobile devices, Mobile Service-Oriented Architecture (Mobile SOA) has become a new industry catch-phrase. Many challenges, however, exist within the Mobile SOA environment. These issues include limitations on mobile devices, such as a reduced screen size, lack of processing power, insufficient processing memory, limited battery life, poor storage capacity, unreliable network connections, limited bandwidth available and high transfer costs. This research aimed to provide an elegant solution to the issues of a mobile device, which hinders the performance of Mobile SOA. The main objective of this research was to improve the effectiveness and efficiency of Mobile SOA. In order to achieve this goal, a framework was proposed, which supported intelligent compression of files used within a Web Service. The proposed framework provided a set of guidelines that facilitate the quick development of a system. A proof-of-concept prototype was developed, based on these guidelines and the framework design principles. The prototype provided practical evidence of the effectiveness of implementing a system based on the proposed framework. An analytical evaluation was conducted to determine the effectiveness of the prototype within the Mobile SOA environment. A performance evaluation was conducted to determine efficiency it provides. Additionally, the performance evaluation highlighted the decrease in file transfer time, as well as the significant reduction in transfer costs. The analytical and performance evaluations demonstrated that the prototype optimises the effectiveness and efficiency of Mobile SOA. The framework could, thus, be used to facilitate efficient file transfer between a Server and (Mobile) Client.
- Full Text:
- Date Issued: 2010
- Authors: Saunders, Evan
- Date: 2010
- Subjects: Service-oriented architecture (Computer science)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10459 , http://hdl.handle.net/10948/1500 , Service-oriented architecture (Computer science)
- Description: The widely accepted standards of Service-Oriented Architecture (SOA) have changed the way many organisations conduct their everyday business. The significant popularity of mobile devices has seen a rapid increase in the rate of mobile technology enhancements, which have become widely used for communication, as well as conducting everyday tasks. An increased requirement in many businesses is for staff not to be tied down to the office. Consequently, mobile devices play an important role in achieving the mobility and information access that people desire. Due to the popularity and increasing use of SOA and mobile devices, Mobile Service-Oriented Architecture (Mobile SOA) has become a new industry catch-phrase. Many challenges, however, exist within the Mobile SOA environment. These issues include limitations on mobile devices, such as a reduced screen size, lack of processing power, insufficient processing memory, limited battery life, poor storage capacity, unreliable network connections, limited bandwidth available and high transfer costs. This research aimed to provide an elegant solution to the issues of a mobile device, which hinders the performance of Mobile SOA. The main objective of this research was to improve the effectiveness and efficiency of Mobile SOA. In order to achieve this goal, a framework was proposed, which supported intelligent compression of files used within a Web Service. The proposed framework provided a set of guidelines that facilitate the quick development of a system. A proof-of-concept prototype was developed, based on these guidelines and the framework design principles. The prototype provided practical evidence of the effectiveness of implementing a system based on the proposed framework. An analytical evaluation was conducted to determine the effectiveness of the prototype within the Mobile SOA environment. A performance evaluation was conducted to determine efficiency it provides. Additionally, the performance evaluation highlighted the decrease in file transfer time, as well as the significant reduction in transfer costs. The analytical and performance evaluations demonstrated that the prototype optimises the effectiveness and efficiency of Mobile SOA. The framework could, thus, be used to facilitate efficient file transfer between a Server and (Mobile) Client.
- Full Text:
- Date Issued: 2010
A framework for recuperation: HIV/AIDS and the Keiskamma Altarpiece
- Authors: Schmahmann, Brenda
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147593 , vital:38652 , https://doi.org/10.1162/afar.2010.43.3.34
- Description: South Africa has the largest number of people living with HIV of any nation in the world. While various conditions and circumstances have made South Africa especially susceptible to an HIV/AIDS pandemic, its leadership has not recognized the impact of the disease or found appropriate strategies to address rising rates of infection. Thabo Mbeki's presidency (1999—2008) and the appointment of Manto Tshabalala-Msimang as his health minister were disastrous in terms of the pandemic.
- Full Text:
- Date Issued: 2010
- Authors: Schmahmann, Brenda
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147593 , vital:38652 , https://doi.org/10.1162/afar.2010.43.3.34
- Description: South Africa has the largest number of people living with HIV of any nation in the world. While various conditions and circumstances have made South Africa especially susceptible to an HIV/AIDS pandemic, its leadership has not recognized the impact of the disease or found appropriate strategies to address rising rates of infection. Thabo Mbeki's presidency (1999—2008) and the appointment of Manto Tshabalala-Msimang as his health minister were disastrous in terms of the pandemic.
- Full Text:
- Date Issued: 2010
A Game Theoretic Framework for Cooperative Benefits in South Africa’s land redistribution process: a case of Northern Kwa-Zulu Natal Sugarcane Farmland Transfers (No. 308-2016-5118)
- Mbatha, Cyril N, Antrobus, Geoffrey G
- Authors: Mbatha, Cyril N , Antrobus, Geoffrey G
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142958 , vital:38180 , https://ageconsearch.umn.edu/record/96156/
- Description: A good indicator of successful farm redistribution cases has to be the continuation of viable productivity rates in their post transfer periods. Continued productivity benefits all the stakeholders that are involved in the process. Unfortunately negative productivity levels have been reported in numerous South African land redistribution transfers in recent years. A game theoretic perspective is adopted to argue that cooperation among key stakeholders, which could be enforced through long term contracts between a land buyer, sellers and new owners, would lead to higher productivity levels and other benefits. Additional benefits would, for example, include market related prices paid by a buyer.
- Full Text:
- Date Issued: 2010
- Authors: Mbatha, Cyril N , Antrobus, Geoffrey G
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142958 , vital:38180 , https://ageconsearch.umn.edu/record/96156/
- Description: A good indicator of successful farm redistribution cases has to be the continuation of viable productivity rates in their post transfer periods. Continued productivity benefits all the stakeholders that are involved in the process. Unfortunately negative productivity levels have been reported in numerous South African land redistribution transfers in recent years. A game theoretic perspective is adopted to argue that cooperation among key stakeholders, which could be enforced through long term contracts between a land buyer, sellers and new owners, would lead to higher productivity levels and other benefits. Additional benefits would, for example, include market related prices paid by a buyer.
- Full Text:
- Date Issued: 2010
A histological description of ovarian recrudescence in two Labeo victorianus populations
- Booth, Anthony J, Hecht, Thomas
- Authors: Booth, Anthony J , Hecht, Thomas
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123564 , vital:35455 , https://doi.org/10.2989/16085910409503813
- Description: The ovaries of Labeo victorianus are paired organs situated in the peritoneal cavity and suspended on either side of the midline by a mesovarium. A capsule, composed of dense, regularly-arranged collagen and elastic fibres mixed with a few smooth muscle cells, enclosed the ovaries and gave off connective tissue septa, forming the ovigerous lamellae, which contained germ and follicle cells. Eight discrete stages of recrudescence were identified: oogonia, chromatin nucleolar oocytes, perinucleolar oocytes, primary yolk vesicle oocytes, secondary yolk vesicle oocytes, tertiary yolk vesicle oocytes, post-ovulatory follicles and atretic oocytes. Ovulation seemed to be synchronised with the onset of rainfall, with some deviations in the Sio River population. Gonadosomatic index variation followed a bimodal pattern, with maxima between January–February and between September–October for both populations. The same pattern was exhibited for both rainfall and water levels at the two study sites. Successful ovulation was followed by the formation of post-ovulatory follicles and Type I atresia, while failed spawning was characterised by Type II atresia. Clearance of post-ovulatory follicles was by phagocytosis and formation of melanomacrophage centres. There were variations in post-ovulatory changes between the two populations. Reproductive patterns in the Kagera River population conformed to the ‘norm’ in African labeines of the synchronisation of spawning with rainfall. Slight deviations from this pattern were, however, observed in the Sio River population where spawning occurred prior to the onset of rainfall.
- Full Text:
- Date Issued: 2010
- Authors: Booth, Anthony J , Hecht, Thomas
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123564 , vital:35455 , https://doi.org/10.2989/16085910409503813
- Description: The ovaries of Labeo victorianus are paired organs situated in the peritoneal cavity and suspended on either side of the midline by a mesovarium. A capsule, composed of dense, regularly-arranged collagen and elastic fibres mixed with a few smooth muscle cells, enclosed the ovaries and gave off connective tissue septa, forming the ovigerous lamellae, which contained germ and follicle cells. Eight discrete stages of recrudescence were identified: oogonia, chromatin nucleolar oocytes, perinucleolar oocytes, primary yolk vesicle oocytes, secondary yolk vesicle oocytes, tertiary yolk vesicle oocytes, post-ovulatory follicles and atretic oocytes. Ovulation seemed to be synchronised with the onset of rainfall, with some deviations in the Sio River population. Gonadosomatic index variation followed a bimodal pattern, with maxima between January–February and between September–October for both populations. The same pattern was exhibited for both rainfall and water levels at the two study sites. Successful ovulation was followed by the formation of post-ovulatory follicles and Type I atresia, while failed spawning was characterised by Type II atresia. Clearance of post-ovulatory follicles was by phagocytosis and formation of melanomacrophage centres. There were variations in post-ovulatory changes between the two populations. Reproductive patterns in the Kagera River population conformed to the ‘norm’ in African labeines of the synchronisation of spawning with rainfall. Slight deviations from this pattern were, however, observed in the Sio River population where spawning occurred prior to the onset of rainfall.
- Full Text:
- Date Issued: 2010