The effect of sewage effluent from De Beers marine diamond mining operations on the expression of cytochrome P450 (CYP1A) and vitellogenin (vtg)
- Authors: De Almeida, Louise
- Date: 2013-09-20
- Subjects: De Beers Consolidated Mines , Sewage disposal in rivers, lakes, etc. -- Namibia , Endocrine disrupting chemicals in water -- Namibia , Merluccius capensis -- Namibia , Merluccius -- Namibia , Water -- Pollution -- Namibia
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4096 , http://hdl.handle.net/10962/d1009440 , De Beers Consolidated Mines , Sewage disposal in rivers, lakes, etc. -- Namibia , Endocrine disrupting chemicals in water -- Namibia , Merluccius capensis -- Namibia , Merluccius -- Namibia , Water -- Pollution -- Namibia
- Description: Sewage effluents disposed into the marine environment from De Beers Marine Namibia diamond mining vessels have the potential to cause endocrine disruptive effects in marine organisms. Endocrine disruption refers to the alteration of the normal functioning of the endocrine system and various chemicals have the ability to mimic hormones, effecting endogenous hormone synthesis, transport, receptor interaction and intracellular signaling. The potential endocrine disruptive effects, caused by the release of different types of sewage effluents into the ocean, on fish species is a concern due to the commercial importance of fish species found in the mining area e.g. hake, sole, horse mackerel. Increased awareness of marine environmental degradation due to the presence of chemical contaminants has resulted in research being done on early warning systems, in the form of biomarkers. Cytochrome P450 monooxygenase 1A (CYP1A) and vitellogenin (vtg) are important proteins found in fish liver and blood, that have been used as biomarkers for the detection of pollutants in fish. CYP1A is a subfamily of the P450 superfamily of enzymes and catalyzes the oxidation, hydrolysis and reduction of exogenous and endogenous compounds (phase I reactions) and thus has the capacity to regulate the metabolism of several organic contaminants. CYP1A expression is altered by exposure to planar xenobiotic compounds e.g. polyaromatic hydrocarbons. Vtg is an important precursor for egg yolk proteins and plays a role in the growth and development of an oocyte. Expression of this protein is altered upon exposure to estrogenic compounds. The aim of this project was to isolate CYP1A from fish liver by differential centrifugation and optimize conditions for the CYP1A-mediated ethoxyresorufin-Odeethylase (EROD) assay and western blot analysis (to assess CYP1A expression). Another aim of this study was to evaluate the potential effects of biologically disruptive chemicals from sewage effluents, discharged into the marine environment, on the expression of CYP1A in two species of hake, Merluccius capensis and M. paradoxus (Cape hake). CYP1A in Cape hake is approximately a 60 kDa protein and the highest EROD activity was detected in the microsomal fraction after differential centrifugation. Optimal EROD assay conditions were observed at pH 7.5, a temperature of 25 °C, 10 μl of sample and a reaction time of 30 seconds. Enzyme stability assays indicated a drastic decrease in enzyme activity after 30 seconds. The EROD assay was not NADPH dependent but was limited by NADPH supply, with an increase of 300% in EROD activity being observed with the addition of 0.1 M exogenous NADPH. The addition of dicumarol (40 μM), a phase II enzyme inhibitor, showed a 232% increase in EROD activity. This is because dicumarol inhibited enzymes with the capacity to metabolize the product (resorufin) of the EROD reaction. With regard to western blot analysis, the optimal primary (rabbit antifish CYP1A peptide) and secondary (anti-mouse/rabbit antibody-horseradish peroxidase conjugate (POD)) antibody dilutions were determined to be 1:1000 and 1:5000, respectively. The comparison of CYP1A expression in Cape hake samples from De Beers Marine mining area and reference sites showed higher EROD activity (16.29 ± 0.91 pmol/min) in fish samples from the mining area in comparison to the reference site (10.42 ± 2.65 pmol/min). Western blot analysis was in agreement with the EROD assay results and a higher CYP1A expression was observed in fish from the mining sites. The increased CYP1A expression observed in fish from the mining area is not definitively an indication of a pollutant effect in the environment, as several environmental and biological factors (e.g. photoperiod and age) must also be considered before reaching this conclusion. Another aim of this study was to purify vtg from Cape hake blood samples. Cape hake vtg was purified from fish plasma by selective precipitation with MgCl2 and EDTA. Precipitated sample was subjected to anion exchange chromatography using fast protein liquid chromatography (FPLC). Vtg eluted as two broad peaks and had a molecular weight above 200 kDa. SDS-PAGE analysis also resolved smaller molecular weight proteins below 70 kDa, which were thought to be vitellogenin cleavage proteins, lipovitellin and phosphovitins. Western blot analysis was performed; however, it did not produce any conclusive results. The purification of vtg enables further studies in characterizing this protein and developing assay aimed at detecting estrogenic pollutants in the marine environment
- Full Text:
- Authors: De Almeida, Louise
- Date: 2013-09-20
- Subjects: De Beers Consolidated Mines , Sewage disposal in rivers, lakes, etc. -- Namibia , Endocrine disrupting chemicals in water -- Namibia , Merluccius capensis -- Namibia , Merluccius -- Namibia , Water -- Pollution -- Namibia
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4096 , http://hdl.handle.net/10962/d1009440 , De Beers Consolidated Mines , Sewage disposal in rivers, lakes, etc. -- Namibia , Endocrine disrupting chemicals in water -- Namibia , Merluccius capensis -- Namibia , Merluccius -- Namibia , Water -- Pollution -- Namibia
- Description: Sewage effluents disposed into the marine environment from De Beers Marine Namibia diamond mining vessels have the potential to cause endocrine disruptive effects in marine organisms. Endocrine disruption refers to the alteration of the normal functioning of the endocrine system and various chemicals have the ability to mimic hormones, effecting endogenous hormone synthesis, transport, receptor interaction and intracellular signaling. The potential endocrine disruptive effects, caused by the release of different types of sewage effluents into the ocean, on fish species is a concern due to the commercial importance of fish species found in the mining area e.g. hake, sole, horse mackerel. Increased awareness of marine environmental degradation due to the presence of chemical contaminants has resulted in research being done on early warning systems, in the form of biomarkers. Cytochrome P450 monooxygenase 1A (CYP1A) and vitellogenin (vtg) are important proteins found in fish liver and blood, that have been used as biomarkers for the detection of pollutants in fish. CYP1A is a subfamily of the P450 superfamily of enzymes and catalyzes the oxidation, hydrolysis and reduction of exogenous and endogenous compounds (phase I reactions) and thus has the capacity to regulate the metabolism of several organic contaminants. CYP1A expression is altered by exposure to planar xenobiotic compounds e.g. polyaromatic hydrocarbons. Vtg is an important precursor for egg yolk proteins and plays a role in the growth and development of an oocyte. Expression of this protein is altered upon exposure to estrogenic compounds. The aim of this project was to isolate CYP1A from fish liver by differential centrifugation and optimize conditions for the CYP1A-mediated ethoxyresorufin-Odeethylase (EROD) assay and western blot analysis (to assess CYP1A expression). Another aim of this study was to evaluate the potential effects of biologically disruptive chemicals from sewage effluents, discharged into the marine environment, on the expression of CYP1A in two species of hake, Merluccius capensis and M. paradoxus (Cape hake). CYP1A in Cape hake is approximately a 60 kDa protein and the highest EROD activity was detected in the microsomal fraction after differential centrifugation. Optimal EROD assay conditions were observed at pH 7.5, a temperature of 25 °C, 10 μl of sample and a reaction time of 30 seconds. Enzyme stability assays indicated a drastic decrease in enzyme activity after 30 seconds. The EROD assay was not NADPH dependent but was limited by NADPH supply, with an increase of 300% in EROD activity being observed with the addition of 0.1 M exogenous NADPH. The addition of dicumarol (40 μM), a phase II enzyme inhibitor, showed a 232% increase in EROD activity. This is because dicumarol inhibited enzymes with the capacity to metabolize the product (resorufin) of the EROD reaction. With regard to western blot analysis, the optimal primary (rabbit antifish CYP1A peptide) and secondary (anti-mouse/rabbit antibody-horseradish peroxidase conjugate (POD)) antibody dilutions were determined to be 1:1000 and 1:5000, respectively. The comparison of CYP1A expression in Cape hake samples from De Beers Marine mining area and reference sites showed higher EROD activity (16.29 ± 0.91 pmol/min) in fish samples from the mining area in comparison to the reference site (10.42 ± 2.65 pmol/min). Western blot analysis was in agreement with the EROD assay results and a higher CYP1A expression was observed in fish from the mining sites. The increased CYP1A expression observed in fish from the mining area is not definitively an indication of a pollutant effect in the environment, as several environmental and biological factors (e.g. photoperiod and age) must also be considered before reaching this conclusion. Another aim of this study was to purify vtg from Cape hake blood samples. Cape hake vtg was purified from fish plasma by selective precipitation with MgCl2 and EDTA. Precipitated sample was subjected to anion exchange chromatography using fast protein liquid chromatography (FPLC). Vtg eluted as two broad peaks and had a molecular weight above 200 kDa. SDS-PAGE analysis also resolved smaller molecular weight proteins below 70 kDa, which were thought to be vitellogenin cleavage proteins, lipovitellin and phosphovitins. Western blot analysis was performed; however, it did not produce any conclusive results. The purification of vtg enables further studies in characterizing this protein and developing assay aimed at detecting estrogenic pollutants in the marine environment
- Full Text:
An organisation development intervention in an Anglican church theological seminary in Southern Africa
- Authors: Chinganga, Percy
- Date: 2013-08-08
- Subjects: College of the Transfiguration (Grahamstown, South Africa) Organizational change -- Church of England -- Africa, Southern Leadership -- Religious aspects -- Christianity -- Africa, Southern Church management -- Church of England -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1959 , http://hdl.handle.net/10962/d1008377
- Description: "Organisation development is a planned, systematic process in which applied behavioral science principles and practices are introduced into ongoing organisations toward the goal of increasing individual and organisational effectiveness. " [French and Bell] This study describes and analyses the implementation of Organisation Development (OD) to an Anglican Church theological seminary, The College of the Transfiguration (Cott), in the Anglican Church of the Province of Southern Africa (ACSA). The origins of OD are business related, emerging in the late 1950s and early 1960s. Over the years, and recently in South Africa, OD has been applied in educational change initiatives. Unlike more traditional change strategies, OD promotes collaboration in organisational change processes through the inclusive participation of all stakeholders. This study is unique in the sense that OD is applied to an Anglican Church theological institution in Southern Africa. The goal of theological institutions, particularly Cot!, is to "form, inform and transform" (Cot! Prospectus, 2011) those who feel called to ordained ministry. Personal experience in this practice has confirmed that organisational emphasis is placed more on product than process; on results rather than the leadership and management of the organisation. This study was an attempt to introduce a process of planned change to such an organisational context. OD was introduced to The College of the Transfiguration in the form of action research using the Survey Data Feedback (SDF) strategy. Data gathered was interpreted and analysed, followed by action planning and implementation of agreed plans. The process had a positive impact on both stakeholders and the organisation despite the challenges associated with the unpredictable world of organisations. Ultimately, I propose tentative recommendations which could help Cott and other educational institutions to achieve long-term improvement in organisational leadership and management.
- Full Text:
- Authors: Chinganga, Percy
- Date: 2013-08-08
- Subjects: College of the Transfiguration (Grahamstown, South Africa) Organizational change -- Church of England -- Africa, Southern Leadership -- Religious aspects -- Christianity -- Africa, Southern Church management -- Church of England -- Africa, Southern
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1959 , http://hdl.handle.net/10962/d1008377
- Description: "Organisation development is a planned, systematic process in which applied behavioral science principles and practices are introduced into ongoing organisations toward the goal of increasing individual and organisational effectiveness. " [French and Bell] This study describes and analyses the implementation of Organisation Development (OD) to an Anglican Church theological seminary, The College of the Transfiguration (Cott), in the Anglican Church of the Province of Southern Africa (ACSA). The origins of OD are business related, emerging in the late 1950s and early 1960s. Over the years, and recently in South Africa, OD has been applied in educational change initiatives. Unlike more traditional change strategies, OD promotes collaboration in organisational change processes through the inclusive participation of all stakeholders. This study is unique in the sense that OD is applied to an Anglican Church theological institution in Southern Africa. The goal of theological institutions, particularly Cot!, is to "form, inform and transform" (Cot! Prospectus, 2011) those who feel called to ordained ministry. Personal experience in this practice has confirmed that organisational emphasis is placed more on product than process; on results rather than the leadership and management of the organisation. This study was an attempt to introduce a process of planned change to such an organisational context. OD was introduced to The College of the Transfiguration in the form of action research using the Survey Data Feedback (SDF) strategy. Data gathered was interpreted and analysed, followed by action planning and implementation of agreed plans. The process had a positive impact on both stakeholders and the organisation despite the challenges associated with the unpredictable world of organisations. Ultimately, I propose tentative recommendations which could help Cott and other educational institutions to achieve long-term improvement in organisational leadership and management.
- Full Text:
A framework for successful SOA adoption in selected South African universities
- Authors: Jacobs, Carmen
- Date: 2013-07-26
- Subjects: System analysis -- Data processing , System design -- Data processing , Systems integration , Service-oriented architecture (Computer science) , Education, Higher -- Data processing
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:1153 , http://hdl.handle.net/10962/d1008366 , System analysis -- Data processing , System design -- Data processing , Systems integration , Service-oriented architecture (Computer science) , Education, Higher -- Data processing
- Description: The demand for systems i·ntegration has become more and more significant in higher education as institutions want systems that provide coherent information with data that is up to date and not redundant and can seamlessly support the end user experience. Institutions have become more reliant on information systems to support both administrative functions and those involved in teaching, learning and research, but because each department supports a diverse array of computing platforms and applications, it becomes very difficult to integrate these systems. SOA is classified as an innovative approach to integrating existing systems involving the use of independent services that can be accessed without knowledge of the underlying platform implementation. Unfortunately, the SOA initiative will not be success if it is not understood and used correctly by various applications and systems throughout the organisation. SOA introduces complexity and challenges in systems integration, acceptance, governance, data, development planning, security and external opportunities. If an organisation does not embrace or enable change in each of these areas, it is not ready for the adoption of SOA. This research investigates the systems integration challenge in selected South African universities and explores factors for SOA adoption. The framework for the adoption of SOA comprises seven factors, of which Systems Integration is the most significant and represents an efficient starting point for institutions considering SOA adoption. Acceptance, Governance, Data, Development Planning, Security and External Opportunities are other factors of SOA adoption that require careful and thorough consideration before an institution can successfully adopt SOA. The results of this research emphasise the importance of being able to embrace change and innovation and modify strategies in order to reflect the constant changes required for the adoption of SOA. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Authors: Jacobs, Carmen
- Date: 2013-07-26
- Subjects: System analysis -- Data processing , System design -- Data processing , Systems integration , Service-oriented architecture (Computer science) , Education, Higher -- Data processing
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:1153 , http://hdl.handle.net/10962/d1008366 , System analysis -- Data processing , System design -- Data processing , Systems integration , Service-oriented architecture (Computer science) , Education, Higher -- Data processing
- Description: The demand for systems i·ntegration has become more and more significant in higher education as institutions want systems that provide coherent information with data that is up to date and not redundant and can seamlessly support the end user experience. Institutions have become more reliant on information systems to support both administrative functions and those involved in teaching, learning and research, but because each department supports a diverse array of computing platforms and applications, it becomes very difficult to integrate these systems. SOA is classified as an innovative approach to integrating existing systems involving the use of independent services that can be accessed without knowledge of the underlying platform implementation. Unfortunately, the SOA initiative will not be success if it is not understood and used correctly by various applications and systems throughout the organisation. SOA introduces complexity and challenges in systems integration, acceptance, governance, data, development planning, security and external opportunities. If an organisation does not embrace or enable change in each of these areas, it is not ready for the adoption of SOA. This research investigates the systems integration challenge in selected South African universities and explores factors for SOA adoption. The framework for the adoption of SOA comprises seven factors, of which Systems Integration is the most significant and represents an efficient starting point for institutions considering SOA adoption. Acceptance, Governance, Data, Development Planning, Security and External Opportunities are other factors of SOA adoption that require careful and thorough consideration before an institution can successfully adopt SOA. The results of this research emphasise the importance of being able to embrace change and innovation and modify strategies in order to reflect the constant changes required for the adoption of SOA. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
Synthesis and evaluation of novel inhibitors of 1-Deoxy-D-xylolose-5-phosphate reductoisomerase as potential antimalarials
- Authors: Conibear, Anne Claire
- Date: 2013-07-19
- Subjects: Antimalarials -- Development , Malaria -- Chemotherapy , Drug development , Enzyme kinetics , Phosphate esters
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4451 , http://hdl.handle.net/10962/d1008282 , Antimalarials -- Development , Malaria -- Chemotherapy , Drug development , Enzyme kinetics , Phosphate esters
- Description: Malaria continues to be an enormous health-threat in the developing world and the emergence of drug resistance has further compounded the problem. The parasite-specific enzyme, 1-deoxY-D-xylulose-S-phosphate reductoisomerase (DXR), has recently been validated as a promising antimalarial drug target. The present study comprises a combination of synthetic, physical organic, computer modelling and bioassay techniques directed towards the development of novel DXR inhibitors. A range of 2-heteroarylamino-2-oxoethyl- and 2- heteroarylamino-2-oxopropyl phosphonate esters and their corresponding phosphonic acid salts have been synthesised as analogues of the highly active DXR inhibitor, fosmidomycin. Treatment of the heteroarylamino precursors with chloroacetyl chloride or chloropropionyl chloride afforded chloroamide intermediates, Arbuzov reactions of which led to the corresponding diethyl phosphonate esters. Hydrolysis of the esters has been effected using bromotrimethylsilane. Twenty-four new compounds have been prepared and fully characterised using elemental (HRMS or combustion) and spectroscopic (1- and 2-D NMR and IR) analysis. A 31p NMR kinetic study has been carried out on the two-step silylation reaction involved in the hydrolysis of the phosphonate esters and has provided activation parameters for the reaction. The kinetic analysis was refined using a computational method to give an improved fit with the experimental data. Saturation transfer difference (STD) NMR analysis, computer-simulated docking and enzyme inhibition assays have been used to evaluate the enzyme-binding and -inhibition potential of the synthesised ligands. Minimal to moderate inhibitory activity has been observed and several structure-activity relationships have been identified. In silica exploration of the DXR active site has revealed an additional binding pocket and information on the topology of the active site has led to the de novo design of a new series of potential ligands. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Authors: Conibear, Anne Claire
- Date: 2013-07-19
- Subjects: Antimalarials -- Development , Malaria -- Chemotherapy , Drug development , Enzyme kinetics , Phosphate esters
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4451 , http://hdl.handle.net/10962/d1008282 , Antimalarials -- Development , Malaria -- Chemotherapy , Drug development , Enzyme kinetics , Phosphate esters
- Description: Malaria continues to be an enormous health-threat in the developing world and the emergence of drug resistance has further compounded the problem. The parasite-specific enzyme, 1-deoxY-D-xylulose-S-phosphate reductoisomerase (DXR), has recently been validated as a promising antimalarial drug target. The present study comprises a combination of synthetic, physical organic, computer modelling and bioassay techniques directed towards the development of novel DXR inhibitors. A range of 2-heteroarylamino-2-oxoethyl- and 2- heteroarylamino-2-oxopropyl phosphonate esters and their corresponding phosphonic acid salts have been synthesised as analogues of the highly active DXR inhibitor, fosmidomycin. Treatment of the heteroarylamino precursors with chloroacetyl chloride or chloropropionyl chloride afforded chloroamide intermediates, Arbuzov reactions of which led to the corresponding diethyl phosphonate esters. Hydrolysis of the esters has been effected using bromotrimethylsilane. Twenty-four new compounds have been prepared and fully characterised using elemental (HRMS or combustion) and spectroscopic (1- and 2-D NMR and IR) analysis. A 31p NMR kinetic study has been carried out on the two-step silylation reaction involved in the hydrolysis of the phosphonate esters and has provided activation parameters for the reaction. The kinetic analysis was refined using a computational method to give an improved fit with the experimental data. Saturation transfer difference (STD) NMR analysis, computer-simulated docking and enzyme inhibition assays have been used to evaluate the enzyme-binding and -inhibition potential of the synthesised ligands. Minimal to moderate inhibitory activity has been observed and several structure-activity relationships have been identified. In silica exploration of the DXR active site has revealed an additional binding pocket and information on the topology of the active site has led to the de novo design of a new series of potential ligands. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
Detecting impacts of invasive non-native sharptooth catfish, Clarias gariepinus, within invaded and non-invaded rivers.
- Kadye, Wilbert T, Booth, Anthony J
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124100 , vital:35539 , https://doi.10.1007/s10531-012-0291-5
- Description: In aquatic ecosystems, impacts by invasive introduced fish can be likened to press disturbances that persistently influence communities. This study examined invasion disturbances by determining the relationship between non-native sharptooth catfish Clarias gariepinus and aquatic macroinvertebrates in the Eastern Cape, South Africa. A Multiple Before–After Control–Impact (MBACI) experimental design was used to examine macroinvertebrate communities within two rivers: one with catfish and another one without catfish. Within the invaded river, macroinvertebrates showed little response to catfish presence, whereas predator exclusion appeared to benefit community structure. This suggests that the macroinvertebrate community within the invaded river was adapted to predation impact because of the dominance of resilient taxa, such as Hirudinea, Oligochaeta and Chironomidae that were abundant in the Impact treatment relative to the Control treatment. High macroinvertebrate diversity and richness that was observed in the Control treatment, which excluded the predator, relative to the Impact treatment suggests predator avoidance behaviour within the invaded river. By comparison, within the uninvaded river, catfish introduction into the Impact treatment plots indicated negative effects on macroinvertebrate community that was reflected by decrease in diversity, richness and biomass. A community level impact was also reflected in the multivariate analysis that indicated more variation in macroinvertebrate composition within the Impact treatment relative to the Control in the uninvaded river. Catfish impact within the uninvaded river suggests the dominance of vulnerable taxa, such as odonates that were less abundant in the Impact treatment plots after catfish introduction. From a disturbance perspective, this study revealed different macroinvertebrate responses to catfish impact, and suggests that within invaded habitats, macroinvertebrates were less responsive to catfish presence, whereas catfish introduction within uninvaded habitats demonstrated invasion impact that was shown by a decrease in the abundance of vulnerable taxa. The occurrence of non-native sharptooth catfish within many Eastern Cape rivers is a concern because of its predation impact and potential to influence trophic interrelationships, and efforts should be taken to protect uninvaded rivers, and, where possible, eradicate the invader.
- Full Text:
- Date Issued: 2012
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124100 , vital:35539 , https://doi.10.1007/s10531-012-0291-5
- Description: In aquatic ecosystems, impacts by invasive introduced fish can be likened to press disturbances that persistently influence communities. This study examined invasion disturbances by determining the relationship between non-native sharptooth catfish Clarias gariepinus and aquatic macroinvertebrates in the Eastern Cape, South Africa. A Multiple Before–After Control–Impact (MBACI) experimental design was used to examine macroinvertebrate communities within two rivers: one with catfish and another one without catfish. Within the invaded river, macroinvertebrates showed little response to catfish presence, whereas predator exclusion appeared to benefit community structure. This suggests that the macroinvertebrate community within the invaded river was adapted to predation impact because of the dominance of resilient taxa, such as Hirudinea, Oligochaeta and Chironomidae that were abundant in the Impact treatment relative to the Control treatment. High macroinvertebrate diversity and richness that was observed in the Control treatment, which excluded the predator, relative to the Impact treatment suggests predator avoidance behaviour within the invaded river. By comparison, within the uninvaded river, catfish introduction into the Impact treatment plots indicated negative effects on macroinvertebrate community that was reflected by decrease in diversity, richness and biomass. A community level impact was also reflected in the multivariate analysis that indicated more variation in macroinvertebrate composition within the Impact treatment relative to the Control in the uninvaded river. Catfish impact within the uninvaded river suggests the dominance of vulnerable taxa, such as odonates that were less abundant in the Impact treatment plots after catfish introduction. From a disturbance perspective, this study revealed different macroinvertebrate responses to catfish impact, and suggests that within invaded habitats, macroinvertebrates were less responsive to catfish presence, whereas catfish introduction within uninvaded habitats demonstrated invasion impact that was shown by a decrease in the abundance of vulnerable taxa. The occurrence of non-native sharptooth catfish within many Eastern Cape rivers is a concern because of its predation impact and potential to influence trophic interrelationships, and efforts should be taken to protect uninvaded rivers, and, where possible, eradicate the invader.
- Full Text:
- Date Issued: 2012
Inter-seasonal persistence and size-structuring of two minnow species within headwater streams in the Eastern Cape, South Africa
- Kadye, Wilbert T, Booth, Anthony J
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124866 , vital:35705 , https://doi.10.1111/j.1439-0426.2012.02027.x
- Description: This study examined temporal variation in population dynamics and size structuring of two cyprinid minnows, Pseudobarbus afer and Barbus anoplus, in relation to their proximate physical habitats. Population estimates were determined using three-pass depletion sampling during both summer and winter. The habitats were characterised by seasonal variation in all physico-chemical conditions and spatial variation in substrata compositions. Whereas significant differences in population size were noted between seasons for B. anoplus, no differences were found between seasons for density and capture probability for either species. An increase in boulders was associated with increase in population size and density for P. afer; for B. anoplus, increased percentages of bedrock and bank vegetation were associated with an increase in population size and probability of capture, respectively. According to Canonical Correspondence Analysis, size structuring in P. afer was explained predominantly by seasonality, with smaller length classes associated with the seasonal variable of summer, while larger length classes were associated with pH that was higher in winter. By comparison, for B. anoplus, the habitat variables – bank vegetation and bedrock – accounted for much of the explained variance for size structuring. Recruitment appeared to be the major driver of size structuring for the two species; refugia, especially boulders and bank vegetation, also appeared to be important. Overall, the two species were adapted to the headwater streams that were generally variable in environmental conditions. Potential invasions by non-native invasive fishes that occur within the mainstream habitats threaten these two species. Efforts should continue to protect these minnows from such invasions by constructing barriers to upstream migration of non-native fishes into these headwater habitats.
- Full Text:
- Date Issued: 2012
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124866 , vital:35705 , https://doi.10.1111/j.1439-0426.2012.02027.x
- Description: This study examined temporal variation in population dynamics and size structuring of two cyprinid minnows, Pseudobarbus afer and Barbus anoplus, in relation to their proximate physical habitats. Population estimates were determined using three-pass depletion sampling during both summer and winter. The habitats were characterised by seasonal variation in all physico-chemical conditions and spatial variation in substrata compositions. Whereas significant differences in population size were noted between seasons for B. anoplus, no differences were found between seasons for density and capture probability for either species. An increase in boulders was associated with increase in population size and density for P. afer; for B. anoplus, increased percentages of bedrock and bank vegetation were associated with an increase in population size and probability of capture, respectively. According to Canonical Correspondence Analysis, size structuring in P. afer was explained predominantly by seasonality, with smaller length classes associated with the seasonal variable of summer, while larger length classes were associated with pH that was higher in winter. By comparison, for B. anoplus, the habitat variables – bank vegetation and bedrock – accounted for much of the explained variance for size structuring. Recruitment appeared to be the major driver of size structuring for the two species; refugia, especially boulders and bank vegetation, also appeared to be important. Overall, the two species were adapted to the headwater streams that were generally variable in environmental conditions. Potential invasions by non-native invasive fishes that occur within the mainstream habitats threaten these two species. Efforts should continue to protect these minnows from such invasions by constructing barriers to upstream migration of non-native fishes into these headwater habitats.
- Full Text:
- Date Issued: 2012
"But what story?": a narrative-discursive analysis of "white" Afrikaners' accounts of male involvement in parenthood decision-making
- Authors: Morison, Tracy
- Date: 2011
- Subjects: Family planning -- South Africa -- Psychological aspects Family size Birth intervals Men -- South Africa -- Attitudes Men -- South Africa -- Psychology Couples -- South Africa -- Psychology Afrikaners -- Attitudes
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3025 , http://hdl.handle.net/10962/d1002534
- Description: Despite the increased focus on men in reproductive research, little is known about male involvement in the initial decision/s regarding parenthood (i.e., to become a parent or not) and the subsequent decision-making that may ensue (e.g., choices about timing or spacing of births). In particular, the parenthood decision-making of “White”, heterosexual men from the middle class has been understudied, as indicated in the existing literature. In South Africa, this oversight has been exacerbated by the tendency for researchers to concentrate on “problematic” men, to the exclusion of the “boring, normal case”. I argue that this silence in the literature is a result of the taken for granted nature of parenthood in the “normal” heterosexual life course. In this study, I have turned the spotlight onto the norm of “Whiteness” and heterosexuality by studying those who have previously been overlooked by researchers. I focus on “White” Afrikaans men’s involvement in parenthood decision-making. My aim was to explore how constructions of gender inform male involvement in decision-making, especially within the South African context where social transformation has challenged traditional conceptions of male selfhood giving rise to new and contested masculine identities and new discourses of manhood and fatherhood. In an effort to ensure that women’s voices are not marginalised in the research, as is often the case in studies of men and masculinity, I conducted in-depth, semi-structured interviews about male involvement in decision-making with both “White” Afrikaans women and men. There were 23 participants in total, who all identified as heterosexual and middle-class. The participants were divided into two age cohorts (21 – 30 years and >40 years), which were then differentiated according to gender, reproductive status, and relationship status. Treating the interviews as jointly produced narratives, I analysed them by means of a performativity/performance lens. This dual analytic lens focuses on how particular narrative performances are simultaneously shaped by the interview setting and the broader discursive context. The lens was fashioned by synthesising Butler’s theory of performativity with Taylor’s narrative-discursive method. This synthesis (1) allows for Butler’s notion of “performativity” to be supplemented with that of “performance”; (2) provides a concrete analytical strategy in the form of positioning analysis; and (3) draws attention to both the micro politics of the interview conversation and the operation of power on the macro level, including the possibility of making “gender trouble”. The findings of the study suggest that the participants experienced difficulty narrating about male involvement in parenthood decision-making, owing to the taken for granted nature of parenthood for heterosexual adults. This was evident in participants’ sidelining of issues of “deciding” and “planning” and their alternate construal of childbearing as a non-choice, which, significantly served to bolster hetero-patriarchal norms. A central rhetorical tool for accomplishing these purposes was found in the construction of the “sacralised” child. In discursively manoeuvring around the central problematic, the participants ultimately produced a “silence” in the data that repeats the one in the research literature.
- Full Text:
- Date Issued: 2011
- Authors: Morison, Tracy
- Date: 2011
- Subjects: Family planning -- South Africa -- Psychological aspects Family size Birth intervals Men -- South Africa -- Attitudes Men -- South Africa -- Psychology Couples -- South Africa -- Psychology Afrikaners -- Attitudes
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3025 , http://hdl.handle.net/10962/d1002534
- Description: Despite the increased focus on men in reproductive research, little is known about male involvement in the initial decision/s regarding parenthood (i.e., to become a parent or not) and the subsequent decision-making that may ensue (e.g., choices about timing or spacing of births). In particular, the parenthood decision-making of “White”, heterosexual men from the middle class has been understudied, as indicated in the existing literature. In South Africa, this oversight has been exacerbated by the tendency for researchers to concentrate on “problematic” men, to the exclusion of the “boring, normal case”. I argue that this silence in the literature is a result of the taken for granted nature of parenthood in the “normal” heterosexual life course. In this study, I have turned the spotlight onto the norm of “Whiteness” and heterosexuality by studying those who have previously been overlooked by researchers. I focus on “White” Afrikaans men’s involvement in parenthood decision-making. My aim was to explore how constructions of gender inform male involvement in decision-making, especially within the South African context where social transformation has challenged traditional conceptions of male selfhood giving rise to new and contested masculine identities and new discourses of manhood and fatherhood. In an effort to ensure that women’s voices are not marginalised in the research, as is often the case in studies of men and masculinity, I conducted in-depth, semi-structured interviews about male involvement in decision-making with both “White” Afrikaans women and men. There were 23 participants in total, who all identified as heterosexual and middle-class. The participants were divided into two age cohorts (21 – 30 years and >40 years), which were then differentiated according to gender, reproductive status, and relationship status. Treating the interviews as jointly produced narratives, I analysed them by means of a performativity/performance lens. This dual analytic lens focuses on how particular narrative performances are simultaneously shaped by the interview setting and the broader discursive context. The lens was fashioned by synthesising Butler’s theory of performativity with Taylor’s narrative-discursive method. This synthesis (1) allows for Butler’s notion of “performativity” to be supplemented with that of “performance”; (2) provides a concrete analytical strategy in the form of positioning analysis; and (3) draws attention to both the micro politics of the interview conversation and the operation of power on the macro level, including the possibility of making “gender trouble”. The findings of the study suggest that the participants experienced difficulty narrating about male involvement in parenthood decision-making, owing to the taken for granted nature of parenthood for heterosexual adults. This was evident in participants’ sidelining of issues of “deciding” and “planning” and their alternate construal of childbearing as a non-choice, which, significantly served to bolster hetero-patriarchal norms. A central rhetorical tool for accomplishing these purposes was found in the construction of the “sacralised” child. In discursively manoeuvring around the central problematic, the participants ultimately produced a “silence” in the data that repeats the one in the research literature.
- Full Text:
- Date Issued: 2011
"On se Débrouille": Congolese migrants' search for survival and success in Muizenberg, Cape Town
- Authors: Owen, Joy N
- Date: 2011
- Subjects: Foreign workers, Congolese -- Social aspects -- South Africa -- Muizenberg Social capital (Sociology) Immigrants -- Social networks -- South Africa -- Muizenberg South Africa -- Emigration and immigration -- Social aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2094 , http://hdl.handle.net/10962/d1002657
- Description: Situated in a Congolese transnational 'community' in Muizenberg, a suburb of Cape Town, South Africa, the thesis focuses on the lives of three middle class Congolese male informants. Their contingent acquaintance with a South African white Christian man gave them access to valuable social capital; social capital that positioned them advantageously to date and eventually marry European white women and thereby further their culturally-defmed economic/material career goals. To demonstrate the socio-economic trajectory of the three, I compare their social positioning with other Congolese men and women resident in Muizenberg. I show how these men and women, like my three main informants, activate their Congolese 'habitus' to secure access to social networks and the social capital therein. The difference between these Congolese men and women and my three main informants, however, is their strategic use of contingency, and the instrumental capitalisation of their cultural capital through the creation of a client-patron relationship with a South African in order to further their life goals. The thesis reorientates the migration literature on African migration from a focus on the implications of migrant remittances to the home country, to a focus on individual migrants' agency in the host country and the cultural influence of the society of origin. While I acknowledge that my research participants are part of a transnational social field, the focus on one locality and the relatively longitudinal approach of the study grounds the analysis both in the day-to-day lives of these migrants and in their migrant careers in and beyond Muizenberg and South Africa. With this orientation, the thesis is able to reveal that some Congolese migrants are comfortable to create a holding place for themselves in South Africa, while others - ever aware of the Congolese ambition to travel overseas - migrate beyond South African borders. For these Congolese migrants, South Africa is then a transit space. Fundamentally, all of my research participants give expression to Mobutu's edict of on se debrouille (literally, 'one fends for oneself), but some are more able to achieve the ultimate aspiration of settling in the First World -lola.
- Full Text:
- Date Issued: 2011
- Authors: Owen, Joy N
- Date: 2011
- Subjects: Foreign workers, Congolese -- Social aspects -- South Africa -- Muizenberg Social capital (Sociology) Immigrants -- Social networks -- South Africa -- Muizenberg South Africa -- Emigration and immigration -- Social aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2094 , http://hdl.handle.net/10962/d1002657
- Description: Situated in a Congolese transnational 'community' in Muizenberg, a suburb of Cape Town, South Africa, the thesis focuses on the lives of three middle class Congolese male informants. Their contingent acquaintance with a South African white Christian man gave them access to valuable social capital; social capital that positioned them advantageously to date and eventually marry European white women and thereby further their culturally-defmed economic/material career goals. To demonstrate the socio-economic trajectory of the three, I compare their social positioning with other Congolese men and women resident in Muizenberg. I show how these men and women, like my three main informants, activate their Congolese 'habitus' to secure access to social networks and the social capital therein. The difference between these Congolese men and women and my three main informants, however, is their strategic use of contingency, and the instrumental capitalisation of their cultural capital through the creation of a client-patron relationship with a South African in order to further their life goals. The thesis reorientates the migration literature on African migration from a focus on the implications of migrant remittances to the home country, to a focus on individual migrants' agency in the host country and the cultural influence of the society of origin. While I acknowledge that my research participants are part of a transnational social field, the focus on one locality and the relatively longitudinal approach of the study grounds the analysis both in the day-to-day lives of these migrants and in their migrant careers in and beyond Muizenberg and South Africa. With this orientation, the thesis is able to reveal that some Congolese migrants are comfortable to create a holding place for themselves in South Africa, while others - ever aware of the Congolese ambition to travel overseas - migrate beyond South African borders. For these Congolese migrants, South Africa is then a transit space. Fundamentally, all of my research participants give expression to Mobutu's edict of on se debrouille (literally, 'one fends for oneself), but some are more able to achieve the ultimate aspiration of settling in the First World -lola.
- Full Text:
- Date Issued: 2011
"Too tired to speak?": investigating the reception of Radio Grahamstown's Lunchtime Live show as a means of linking local communities to power
- Authors: Tsarwe, Stanley Zvinaiye
- Date: 2011
- Subjects: Community radio -- South Africa -- Grahamstown Radio broadcasting -- South Africa -- Grahamstown Radio journalism -- South Africa -- Grahamstown Mass media -- Political aspects -- South Africa -- Grahamstown Grahamstown (South Africa) -- Economic conditions -- 21st century Grahamstown (South Africa) -- Social conditions -- 21st century Civil society -- South Africa -- Grahamstown Political participation -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3488 , http://hdl.handle.net/10962/d1002943
- Description: This study sets out to investigate Lunchtime Live, a twice-weekly, one-hour long current affairs show broadcast on a small community radio station, Radio Grahamstown, to understand its role in the local public sphere, and its value in helping civil society’s understanding of and involvement in the power structures and political activities in Grahamstown. Lunchtime Live seeks to cultivate a collective identity and promote public participation in the public affairs of Grahamstown. As a key avenue of investigation, this study seeks to test theory against practice, by evaluating Lunchtime Live’s aspirations against the audiences’ perception of it. This investigation uses qualitative content analysis of selected episodes of recorded transcripts of the shows that aired between August 2010 and March 2011, together with the audiences’ verbalised experiences of this programme through focus group discussions. The study principally uses qualitative research informed by reception theory. The research reveals three key findings. First, that resonance rather than resistance is the more dominant ‘stance’ or ‘attitude’ towards the content of Lunchtime Live. Residents interviewed agreed that the programme is able to give a “realistic” representation of their worldview, and thus is able to articulate issues that affect their lives. Second, that whilst the programme is helping establish links between members of the civil society as well as between civil society and their political representatives, residents feel that local democracy is failing to bring qualitative improvements to their everyday lives and that more ‘participation’ is unlikely to change this. Most respondents blame this on a lack of political will, incompetence, corruption and populist rhetoric by politicians who fail to deliver on the mantra of ‘a better life for all’ in the socioeconomic sphere. The study finds a scepticism and even cynicism that participatory media seems to be able to do little to dilute. Thirdly, in spite of the largely positive view about Lunchtime Live’s capacity to be a platform for public engagement, its participatory potential is structurally constrained by the material privations of most of its listeners. Given that in order to participate in talk shows and discussions audience members have to phone in, economic deprivation often precludes this. It is clear from this research that despite shows such as Lunchtime Live that are exploring new techniques of popular involvement, the voice of the ordinary people still struggles to be heard.
- Full Text:
- Date Issued: 2011
- Authors: Tsarwe, Stanley Zvinaiye
- Date: 2011
- Subjects: Community radio -- South Africa -- Grahamstown Radio broadcasting -- South Africa -- Grahamstown Radio journalism -- South Africa -- Grahamstown Mass media -- Political aspects -- South Africa -- Grahamstown Grahamstown (South Africa) -- Economic conditions -- 21st century Grahamstown (South Africa) -- Social conditions -- 21st century Civil society -- South Africa -- Grahamstown Political participation -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3488 , http://hdl.handle.net/10962/d1002943
- Description: This study sets out to investigate Lunchtime Live, a twice-weekly, one-hour long current affairs show broadcast on a small community radio station, Radio Grahamstown, to understand its role in the local public sphere, and its value in helping civil society’s understanding of and involvement in the power structures and political activities in Grahamstown. Lunchtime Live seeks to cultivate a collective identity and promote public participation in the public affairs of Grahamstown. As a key avenue of investigation, this study seeks to test theory against practice, by evaluating Lunchtime Live’s aspirations against the audiences’ perception of it. This investigation uses qualitative content analysis of selected episodes of recorded transcripts of the shows that aired between August 2010 and March 2011, together with the audiences’ verbalised experiences of this programme through focus group discussions. The study principally uses qualitative research informed by reception theory. The research reveals three key findings. First, that resonance rather than resistance is the more dominant ‘stance’ or ‘attitude’ towards the content of Lunchtime Live. Residents interviewed agreed that the programme is able to give a “realistic” representation of their worldview, and thus is able to articulate issues that affect their lives. Second, that whilst the programme is helping establish links between members of the civil society as well as between civil society and their political representatives, residents feel that local democracy is failing to bring qualitative improvements to their everyday lives and that more ‘participation’ is unlikely to change this. Most respondents blame this on a lack of political will, incompetence, corruption and populist rhetoric by politicians who fail to deliver on the mantra of ‘a better life for all’ in the socioeconomic sphere. The study finds a scepticism and even cynicism that participatory media seems to be able to do little to dilute. Thirdly, in spite of the largely positive view about Lunchtime Live’s capacity to be a platform for public engagement, its participatory potential is structurally constrained by the material privations of most of its listeners. Given that in order to participate in talk shows and discussions audience members have to phone in, economic deprivation often precludes this. It is clear from this research that despite shows such as Lunchtime Live that are exploring new techniques of popular involvement, the voice of the ordinary people still struggles to be heard.
- Full Text:
- Date Issued: 2011
'Carrying the fire' : Cormac McCarthy's moral philosophy
- Authors: Davies, Christopher
- Date: 2011
- Subjects: McCarthy, Cormac, 1933- -- Criticism and interpretation American fiction -- 20th century -- Moral and ethical aspects American fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2217 , http://hdl.handle.net/10962/d1002260
- Description: In this thesis, I argue that the question of ethics, despite claims to the contrary, is a central concern in Cormac McCarthy’s fiction. My principal contention, in this regard, is that an approach that is not reliant on conventional systems of meaning is needed if one is to engage effectively with the moral value of this writer’s oeuvre. In devising such an approach, I draw heavily on the ‘immoralist’ writings of Friedrich Nietzsche. The first chapter of the study contends that good and evil, terms central to conventional morality, do not occupy easily definable positions in McCarthy’s work. In the second chapter, the emphasis falls on the way in which language and myth’s mediation of reality informs choice. The final chapter focuses on the post-apocalyptic setting of The Road, in which normative systems of value are completely absent. It argues that, despite this absence, McCarthy presents a compassionate ethic that is able to find purchase in the harsh world depicted in the novel. Finally, then, this study argues that McCarthy’s latest novel, The Road, requires a reconsideration of the critical claim that his work is nihilistic and that it negates moral value.
- Full Text:
- Date Issued: 2011
- Authors: Davies, Christopher
- Date: 2011
- Subjects: McCarthy, Cormac, 1933- -- Criticism and interpretation American fiction -- 20th century -- Moral and ethical aspects American fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2217 , http://hdl.handle.net/10962/d1002260
- Description: In this thesis, I argue that the question of ethics, despite claims to the contrary, is a central concern in Cormac McCarthy’s fiction. My principal contention, in this regard, is that an approach that is not reliant on conventional systems of meaning is needed if one is to engage effectively with the moral value of this writer’s oeuvre. In devising such an approach, I draw heavily on the ‘immoralist’ writings of Friedrich Nietzsche. The first chapter of the study contends that good and evil, terms central to conventional morality, do not occupy easily definable positions in McCarthy’s work. In the second chapter, the emphasis falls on the way in which language and myth’s mediation of reality informs choice. The final chapter focuses on the post-apocalyptic setting of The Road, in which normative systems of value are completely absent. It argues that, despite this absence, McCarthy presents a compassionate ethic that is able to find purchase in the harsh world depicted in the novel. Finally, then, this study argues that McCarthy’s latest novel, The Road, requires a reconsideration of the critical claim that his work is nihilistic and that it negates moral value.
- Full Text:
- Date Issued: 2011
'I want to tell the story again': re-telling in selected novels by Jeanette Winterson and Alan Warner
- Authors: Collett, Jenna Lara
- Date: 2011
- Subjects: Warner, Alan Criticism and interpretation Winterson, Jeanette, 1959- -- Criticism and interpretation English fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2248 , http://hdl.handle.net/10962/d1002291
- Description: This thesis investigates acts of ‘re-telling’ in four selected novels by Jeanette Winterson and Alan Warner.Re-telling, as I have defined it, refers to the re-imagining and re-writing of existing narratives from mythology, fairy tale, and folktale, as well as the re-visioning of scientific discourses and historiography. I argue that this re-telling is representative of a contemporary cultural phenomenon, and is evidence of a postmodern genre that some literary theorists have termed re-visionary fiction. Despite the prevalent re-telling of canonical stories throughout literary history, there is much evidence for the emergence of a specifically contemporary trend of re-visionary literature. Part One of this thesis comprises two chapters which deal with Winterson’s Sexing the Cherry (1989) and Weight (2005) respectively. In these chapters, I argue that, although the feminist and historiographic elements of her work are significant, there exist further motivations for Winterson’s acts of re-telling in both Sexing the Cherry and Weight. In Chapter One, I analyse Winterson’s subversion and re-imagining of historiography, as well as her re-telling of fairy tale, in Sexing the Cherry. Chapter Two provides a discussion of Winterson’s re-telling of the myth of Atlas from Greek mythology, in which she draws on the discourses of science, technology, and autobiography, in Weight. Part Two focuses on Warner’s first two novels, Morvern Callar (1995) and These Demented Lands (1997). In both novels, Warner re-imagines aspects of Christian, Celtic and pagan mythology in order to debunk the validity of biblical archetypes and narratives in a contemporary working-class setting, as well as to endow his protagonist with goddess-like or mythical sensibilities. Chapter Three deals predominantly with Warner’s use of language, which I argue is central to his blending of mythological and contemporary content, while Chapter Four analyses his use of myth in these two novels. This thesis argues that while both Winterson and Warner share many of the aims associated with contemporary re-visionary fiction, their novels also exceed the boundaries of the genre in various ways. Winterson and Warner may, therefore, represent a new class of re-visionary writers, whose aim is not solely to subvert the pre-text but to draw on its generic discourses and thematic conventions in order to demonstrate the generic and discursive possibilities inherent in the act of re-telling.
- Full Text:
- Date Issued: 2011
- Authors: Collett, Jenna Lara
- Date: 2011
- Subjects: Warner, Alan Criticism and interpretation Winterson, Jeanette, 1959- -- Criticism and interpretation English fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2248 , http://hdl.handle.net/10962/d1002291
- Description: This thesis investigates acts of ‘re-telling’ in four selected novels by Jeanette Winterson and Alan Warner.Re-telling, as I have defined it, refers to the re-imagining and re-writing of existing narratives from mythology, fairy tale, and folktale, as well as the re-visioning of scientific discourses and historiography. I argue that this re-telling is representative of a contemporary cultural phenomenon, and is evidence of a postmodern genre that some literary theorists have termed re-visionary fiction. Despite the prevalent re-telling of canonical stories throughout literary history, there is much evidence for the emergence of a specifically contemporary trend of re-visionary literature. Part One of this thesis comprises two chapters which deal with Winterson’s Sexing the Cherry (1989) and Weight (2005) respectively. In these chapters, I argue that, although the feminist and historiographic elements of her work are significant, there exist further motivations for Winterson’s acts of re-telling in both Sexing the Cherry and Weight. In Chapter One, I analyse Winterson’s subversion and re-imagining of historiography, as well as her re-telling of fairy tale, in Sexing the Cherry. Chapter Two provides a discussion of Winterson’s re-telling of the myth of Atlas from Greek mythology, in which she draws on the discourses of science, technology, and autobiography, in Weight. Part Two focuses on Warner’s first two novels, Morvern Callar (1995) and These Demented Lands (1997). In both novels, Warner re-imagines aspects of Christian, Celtic and pagan mythology in order to debunk the validity of biblical archetypes and narratives in a contemporary working-class setting, as well as to endow his protagonist with goddess-like or mythical sensibilities. Chapter Three deals predominantly with Warner’s use of language, which I argue is central to his blending of mythological and contemporary content, while Chapter Four analyses his use of myth in these two novels. This thesis argues that while both Winterson and Warner share many of the aims associated with contemporary re-visionary fiction, their novels also exceed the boundaries of the genre in various ways. Winterson and Warner may, therefore, represent a new class of re-visionary writers, whose aim is not solely to subvert the pre-text but to draw on its generic discourses and thematic conventions in order to demonstrate the generic and discursive possibilities inherent in the act of re-telling.
- Full Text:
- Date Issued: 2011
(In)visibility and the exercise of power: a genealogy of the politics of drag spectacles in a small city in South Africa
- Authors: Marx, Jacqueline Greer
- Date: 2011
- Subjects: Female impersonators -- Research -- South Africa Male impersonators -- Research -- South Africa Apartheid -- South Africa -- Psychological aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3013 , http://hdl.handle.net/10962/d1002522
- Description: This study investigates the politics of homosexual visibility in dressing-up, cross-dressing and drag performances that take place in a small city in South Africa over a period of sixty years, beginning in the 1950s and the inception of apartheid policy, through the socio-political changes in the 1990s to the 21st century post-apartheid context. The study draws on Butler’s notion of performative resistance and adopts a Foucauldian genealogy to examine the conditions that make visibility possible and through which particular representations of homosexuality are articulated and read, or remain unread or misread. Information about dressing-up, cross-dressing and drag performance was obtained in interviews, from documentary evidence, and from audio-visual recordings of drag shows and gay and lesbian beauty pageant competitions. Semiotics and a Foucauldian approach to analysing discourse were used to interpret the written, spoken, and visual texts. In this study I argue that the state prohibition of homosexuality during apartheid meant that people could not admit to knowing about it, and this ‘not knowing’ provided a cover for homosexual behaviour in public. At this time, the threat of being identified was associated with police raids on private parties. In the 1990s, homosexual visibility was more viable than it had been in the past. However, the strategies that were adopted to negotiate public visibility at this time were tailored to appease normative sentiments rather than challenge them. I argue that, historically, race and gender have played a role in diminishing and exacerbating homosexual visibility and its politics. Addressing the potential for harm that is associated with homosexual visibility in the 21st century post-apartheid context, this study considers the circumstances in which invisibility is desirable.
- Full Text:
- Date Issued: 2011
- Authors: Marx, Jacqueline Greer
- Date: 2011
- Subjects: Female impersonators -- Research -- South Africa Male impersonators -- Research -- South Africa Apartheid -- South Africa -- Psychological aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3013 , http://hdl.handle.net/10962/d1002522
- Description: This study investigates the politics of homosexual visibility in dressing-up, cross-dressing and drag performances that take place in a small city in South Africa over a period of sixty years, beginning in the 1950s and the inception of apartheid policy, through the socio-political changes in the 1990s to the 21st century post-apartheid context. The study draws on Butler’s notion of performative resistance and adopts a Foucauldian genealogy to examine the conditions that make visibility possible and through which particular representations of homosexuality are articulated and read, or remain unread or misread. Information about dressing-up, cross-dressing and drag performance was obtained in interviews, from documentary evidence, and from audio-visual recordings of drag shows and gay and lesbian beauty pageant competitions. Semiotics and a Foucauldian approach to analysing discourse were used to interpret the written, spoken, and visual texts. In this study I argue that the state prohibition of homosexuality during apartheid meant that people could not admit to knowing about it, and this ‘not knowing’ provided a cover for homosexual behaviour in public. At this time, the threat of being identified was associated with police raids on private parties. In the 1990s, homosexual visibility was more viable than it had been in the past. However, the strategies that were adopted to negotiate public visibility at this time were tailored to appease normative sentiments rather than challenge them. I argue that, historically, race and gender have played a role in diminishing and exacerbating homosexual visibility and its politics. Addressing the potential for harm that is associated with homosexual visibility in the 21st century post-apartheid context, this study considers the circumstances in which invisibility is desirable.
- Full Text:
- Date Issued: 2011
A Baseline Numeric Analysis of Network Telescope Data for Network Incident Discovery
- Cowie, Bradley, Irwin, Barry V W
- Authors: Cowie, Bradley , Irwin, Barry V W
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427971 , vital:72477 , https://www.researchgate.net/profile/Barry-Ir-win/publication/326225071_An_Evaluation_of_Trading_Bands_as_Indicators_for_Network_Telescope_Datasets/links/5b3f231a4585150d2309e1c0/An-Evaluation-of-Trading-Bands-as-Indicators-for-Network-Telescope-Datasets.pdf
- Description: This paper investigates the value of Network Telescope data as a mechanism for network incident discovery by considering data summa-rization, simple heuristic identification and deviations from previously observed traffic distributions. It is important to note that the traffic ob-served is obtained from a Network Telescope and thus does not expe-rience the same fluctuations or vagaries experienced by normal traffic. The datasets used for this analysis were obtained from a Network Tele-scope for the time period August 2005 to September 2009 which had been allocated a Class-C network address block at Rhodes University. The nature of the datasets were considered in terms of simple statistical measures obtained through data summarization which greatly reduced the processing and observation required to determine whether an inci-dent had occurred. However, this raised issues relating to the time in-terval used for identification of an incident. A brief discussion into statis-tical summaries of Network Telescope data as" good" security metrics is provided. The summaries derived were then used to seek for signs of anomalous network activity. Anomalous activity detected was then rec-onciled by considering incidents that had occurred in the same or simi-lar time interval. Incidents identified included Conficker, Win32. RinBot, DDoS and Norton Netware vulnerabilities. Detection techniques includ-ed identification of rapid growth in packet count, packet size deviations, changes in the composition of the traffic expressed as a ratio of its constituents and changes in the modality of the data. Discussion into the appropriateness of this sort of manual analysis is provided and suggestions towards an automated solution are discussed.
- Full Text:
- Date Issued: 2011
- Authors: Cowie, Bradley , Irwin, Barry V W
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427971 , vital:72477 , https://www.researchgate.net/profile/Barry-Ir-win/publication/326225071_An_Evaluation_of_Trading_Bands_as_Indicators_for_Network_Telescope_Datasets/links/5b3f231a4585150d2309e1c0/An-Evaluation-of-Trading-Bands-as-Indicators-for-Network-Telescope-Datasets.pdf
- Description: This paper investigates the value of Network Telescope data as a mechanism for network incident discovery by considering data summa-rization, simple heuristic identification and deviations from previously observed traffic distributions. It is important to note that the traffic ob-served is obtained from a Network Telescope and thus does not expe-rience the same fluctuations or vagaries experienced by normal traffic. The datasets used for this analysis were obtained from a Network Tele-scope for the time period August 2005 to September 2009 which had been allocated a Class-C network address block at Rhodes University. The nature of the datasets were considered in terms of simple statistical measures obtained through data summarization which greatly reduced the processing and observation required to determine whether an inci-dent had occurred. However, this raised issues relating to the time in-terval used for identification of an incident. A brief discussion into statis-tical summaries of Network Telescope data as" good" security metrics is provided. The summaries derived were then used to seek for signs of anomalous network activity. Anomalous activity detected was then rec-onciled by considering incidents that had occurred in the same or simi-lar time interval. Incidents identified included Conficker, Win32. RinBot, DDoS and Norton Netware vulnerabilities. Detection techniques includ-ed identification of rapid growth in packet count, packet size deviations, changes in the composition of the traffic expressed as a ratio of its constituents and changes in the modality of the data. Discussion into the appropriateness of this sort of manual analysis is provided and suggestions towards an automated solution are discussed.
- Full Text:
- Date Issued: 2011
A case study investigation into drama in education as an effective teaching methodology to support the goals of outcome based education
- Authors: Elliott, Terri Anne
- Date: 2011
- Subjects: Drama in education -- South Africa Competency based education -- South Africa Curriculum planning -- South Africa Student centered learning -- South Africa Critical thinking -- Study and teaching -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2160 , http://hdl.handle.net/10962/d1008306
- Description: The introduction of outcomes based education (OBE) in the form of Curriculum 2005 (C2005), the National Curriculum Statement (NCS) and the Revised National Curriculum Statement (RNCS) in post-apartheid South Africa resulted in a shift from a content-centred to a learner-centred view on education. This transition took place rapidly as the new government wanted to introduce a democratic education system after the divisive Bantu education system from Apartheid. However, after the changes were implemented, education in South Africa was theoretically outcomes based but practically many educators were still teaching in a content-centred manner. The research puts forward the proposal that drama-in-education (D-i-E) is a useful means by which to align the practical and theoretical goals of OBE within the context of South Africa's current RNCS. This hypothesis drives the main research question: "Can D-i-E be an effective teaching methodology to realise the goals of the RNCS and generate OBE learning environments in a South African high school?" D-i-E is a learner-centred teaching methodology and in practise it meets many of the goals and Critical Cross-Field Outcomes (CCFOs) of OBE. Some of these include the fact that learners can: • Practice problem-solving skills; • Engage with critical and creative thinking; • Grow cultural and aesthetic sensitivity; • Work effectively in groups; and ii. • Learn in inclusive environments that cater for different learning styles and levels. The research examines the use of D-i-E as an outcomes based methodology by which the RNCS could be implemented in the classroom. This is explored through the use of qualitative research in the form of a case study investigation at a South African high school. The case study was conducted with Grade 11 and Grade 12 Dramatic Arts learners and involves an analysis of a D-i-E approach to learning. The conclusion that D-i-E is an effective outcomes based teaching methodology which could assist educators in realising the RNCS was largely reached through participant observation of D-i-E classes and by analysing the learners' journals in which they reflected on D-i-E experiences. The learners' feedback about the experience was generally positive and they reflected that they found D-i-E beneficial because of the fact that it engaged them experientially. They also reflected that D-i-E provided them with a more meaningful and exciting way of learning. These findings are however only generalisable to the type of context (Dramatic Arts learners from a well-resourced girls' high school) in which the research was conducted. The findings provide detailed insight into a specific case study and may be beneficial to educators in South Africa who aim to make use of the same or similar methodologies in their classroom practice. D-i-E also supports many of the underlying tenants of OBE such as learner-centredness, learner diversity and inclusive learning, and can effectively aid educators in implementing the RNCS in an outcomes based way.
- Full Text:
- Date Issued: 2011
- Authors: Elliott, Terri Anne
- Date: 2011
- Subjects: Drama in education -- South Africa Competency based education -- South Africa Curriculum planning -- South Africa Student centered learning -- South Africa Critical thinking -- Study and teaching -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2160 , http://hdl.handle.net/10962/d1008306
- Description: The introduction of outcomes based education (OBE) in the form of Curriculum 2005 (C2005), the National Curriculum Statement (NCS) and the Revised National Curriculum Statement (RNCS) in post-apartheid South Africa resulted in a shift from a content-centred to a learner-centred view on education. This transition took place rapidly as the new government wanted to introduce a democratic education system after the divisive Bantu education system from Apartheid. However, after the changes were implemented, education in South Africa was theoretically outcomes based but practically many educators were still teaching in a content-centred manner. The research puts forward the proposal that drama-in-education (D-i-E) is a useful means by which to align the practical and theoretical goals of OBE within the context of South Africa's current RNCS. This hypothesis drives the main research question: "Can D-i-E be an effective teaching methodology to realise the goals of the RNCS and generate OBE learning environments in a South African high school?" D-i-E is a learner-centred teaching methodology and in practise it meets many of the goals and Critical Cross-Field Outcomes (CCFOs) of OBE. Some of these include the fact that learners can: • Practice problem-solving skills; • Engage with critical and creative thinking; • Grow cultural and aesthetic sensitivity; • Work effectively in groups; and ii. • Learn in inclusive environments that cater for different learning styles and levels. The research examines the use of D-i-E as an outcomes based methodology by which the RNCS could be implemented in the classroom. This is explored through the use of qualitative research in the form of a case study investigation at a South African high school. The case study was conducted with Grade 11 and Grade 12 Dramatic Arts learners and involves an analysis of a D-i-E approach to learning. The conclusion that D-i-E is an effective outcomes based teaching methodology which could assist educators in realising the RNCS was largely reached through participant observation of D-i-E classes and by analysing the learners' journals in which they reflected on D-i-E experiences. The learners' feedback about the experience was generally positive and they reflected that they found D-i-E beneficial because of the fact that it engaged them experientially. They also reflected that D-i-E provided them with a more meaningful and exciting way of learning. These findings are however only generalisable to the type of context (Dramatic Arts learners from a well-resourced girls' high school) in which the research was conducted. The findings provide detailed insight into a specific case study and may be beneficial to educators in South Africa who aim to make use of the same or similar methodologies in their classroom practice. D-i-E also supports many of the underlying tenants of OBE such as learner-centredness, learner diversity and inclusive learning, and can effectively aid educators in implementing the RNCS in an outcomes based way.
- Full Text:
- Date Issued: 2011
A case study of the implementation of science process skills for grades 4 to 7 learners in natural sciences in a South African primary school
- Authors: Ambross, Johannes Nikolaas
- Date: 2011
- Subjects: Science -- Study and teaching (Primary) , Science -- Study and teaching -- South Africa -- Port Elizabeth -- Evaluation , Education -- Evaluation
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:9501 , http://hdl.handle.net/10948/1411 , Science -- Study and teaching (Primary) , Science -- Study and teaching -- South Africa -- Port Elizabeth -- Evaluation , Education -- Evaluation
- Description: With the publication of the National Curriculum Statement (2002) (NCS) the use and development of science process skills have become a critical part of the teaching and learning of the Natural Sciences in South Africa. This study sought to evaluate the implementation and development of these basic skills by four grade 4-7 educators at classroom level at a primary school in the northern areas of Port Elizabeth. Qualitative data for this evaluation were collected through educator interviews, classroom observation as well as a focus-group interview. Quantitative data were gathered by means of a Science Process Skills Observation Scale and through examining the learners' assessment activities. An Assessment Activity Science Process Skill Rating-Scale was used to evaluate assessment activities. Data generated from this study were carefully analysed and on the basis of their interpretation it was concluded that the implementation and development of science process skills were strongly influenced by the educators' understanding of these basic concepts, the belief held by each educator about their role and how their learners learn, the presence of quality support and effective training programmes as well continuous professional development.
- Full Text:
- Date Issued: 2011
- Authors: Ambross, Johannes Nikolaas
- Date: 2011
- Subjects: Science -- Study and teaching (Primary) , Science -- Study and teaching -- South Africa -- Port Elizabeth -- Evaluation , Education -- Evaluation
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:9501 , http://hdl.handle.net/10948/1411 , Science -- Study and teaching (Primary) , Science -- Study and teaching -- South Africa -- Port Elizabeth -- Evaluation , Education -- Evaluation
- Description: With the publication of the National Curriculum Statement (2002) (NCS) the use and development of science process skills have become a critical part of the teaching and learning of the Natural Sciences in South Africa. This study sought to evaluate the implementation and development of these basic skills by four grade 4-7 educators at classroom level at a primary school in the northern areas of Port Elizabeth. Qualitative data for this evaluation were collected through educator interviews, classroom observation as well as a focus-group interview. Quantitative data were gathered by means of a Science Process Skills Observation Scale and through examining the learners' assessment activities. An Assessment Activity Science Process Skill Rating-Scale was used to evaluate assessment activities. Data generated from this study were carefully analysed and on the basis of their interpretation it was concluded that the implementation and development of science process skills were strongly influenced by the educators' understanding of these basic concepts, the belief held by each educator about their role and how their learners learn, the presence of quality support and effective training programmes as well continuous professional development.
- Full Text:
- Date Issued: 2011
A case study of the strategic leadership displayed by Kevin Hedderwick at Famous Brands between 2004-2009
- Authors: Tom, Lubabalo Alexander
- Date: 2011
- Subjects: Hedderwick, Kevin Famous Brands Leadership -- South Africa Case studies Strategic planning -- South Africa Case studies Corporate culture -- South Africa Case studies Organizational behavior -- South Africa Case studies Financial management -- South Africa Case studies Food industry and trade -- South Africa Case studies
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:772 , http://hdl.handle.net/10962/d1003893
- Description: Research studies and the review of academic literature has found that strategic leadership had a direct impact on organisational climate, and that climate in turn accounted for nearly one third of the financial results of organisations (Goleman, 2000). The conclusion from research conducted across 13 industries established that over a 20 year period, leadership accounted for more variations in performance than any other variable (Northouse, 2006). This thesis confines its research to a case study on Famous Brands. Famous Brands is currently one of Africa’s leading Quick Service Restaurant and Casual Dining franchisors and is also represented in the United Kingdom. The Group also has a manufacturing arm and supplies its franchisees, the retail trade and the broader hospitality industry with a wide range of meat, sauce, bakery, ice cream, fruit juice and mineral water products. At the time when the company’s name changed from Steers Holdings to Famous Brand in 2004, Kevin Hedderwick was appointed as Chief Operating Officer. The research examines how Kevin Hedderwick has exercised strategic leadership and thereby influenced Famous Brands’ performance. Hedderwick displays qualities, attributes and behaviours that are characterized by the phenomenon of “strategic leadership”. A quantitative analysis of Famous Brands financial performance (between 2005 and 2009) was undertaken. Further qualitative descriptions were used to further give meaning to the financial results. The success experienced by Famous Brands since Hedderwick’s appointment, seem to suggest that strategic choices and initiatives have been met with great success. The research is presented in the form of a case study that can be developed into a teaching case to be used in the classroom to illustrate the exercise of strategic leadership. The researcher explored a qualitative research framework by collecting and assimilating data from available documentation, and from a formal interview that was conducted with Mr Hedderwick. Information was also obtained from interviews that were conducted with other senior executives and influential personnel. This research concludes that the success of organisations is dependent on the interventions of a strategic leader who displays a specialist set of skills and behaviours. These strategic leaders have the ability to successfully influence their employees, thereby creating an enabling environment for the implementation of their strategic choices.
- Full Text:
- Date Issued: 2011
- Authors: Tom, Lubabalo Alexander
- Date: 2011
- Subjects: Hedderwick, Kevin Famous Brands Leadership -- South Africa Case studies Strategic planning -- South Africa Case studies Corporate culture -- South Africa Case studies Organizational behavior -- South Africa Case studies Financial management -- South Africa Case studies Food industry and trade -- South Africa Case studies
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:772 , http://hdl.handle.net/10962/d1003893
- Description: Research studies and the review of academic literature has found that strategic leadership had a direct impact on organisational climate, and that climate in turn accounted for nearly one third of the financial results of organisations (Goleman, 2000). The conclusion from research conducted across 13 industries established that over a 20 year period, leadership accounted for more variations in performance than any other variable (Northouse, 2006). This thesis confines its research to a case study on Famous Brands. Famous Brands is currently one of Africa’s leading Quick Service Restaurant and Casual Dining franchisors and is also represented in the United Kingdom. The Group also has a manufacturing arm and supplies its franchisees, the retail trade and the broader hospitality industry with a wide range of meat, sauce, bakery, ice cream, fruit juice and mineral water products. At the time when the company’s name changed from Steers Holdings to Famous Brand in 2004, Kevin Hedderwick was appointed as Chief Operating Officer. The research examines how Kevin Hedderwick has exercised strategic leadership and thereby influenced Famous Brands’ performance. Hedderwick displays qualities, attributes and behaviours that are characterized by the phenomenon of “strategic leadership”. A quantitative analysis of Famous Brands financial performance (between 2005 and 2009) was undertaken. Further qualitative descriptions were used to further give meaning to the financial results. The success experienced by Famous Brands since Hedderwick’s appointment, seem to suggest that strategic choices and initiatives have been met with great success. The research is presented in the form of a case study that can be developed into a teaching case to be used in the classroom to illustrate the exercise of strategic leadership. The researcher explored a qualitative research framework by collecting and assimilating data from available documentation, and from a formal interview that was conducted with Mr Hedderwick. Information was also obtained from interviews that were conducted with other senior executives and influential personnel. This research concludes that the success of organisations is dependent on the interventions of a strategic leader who displays a specialist set of skills and behaviours. These strategic leaders have the ability to successfully influence their employees, thereby creating an enabling environment for the implementation of their strategic choices.
- Full Text:
- Date Issued: 2011
A comparative analysis of the development of performers' rights in the United Kingdom and South Africa
- Authors: Wagenaar, Tanya
- Date: 2011
- Subjects: Copyright -- Performing rights -- Great Britain , Copyright -- Performing rights -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10215 , http://hdl.handle.net/10948/1442 , Copyright -- Performing rights -- Great Britain , Copyright -- Performing rights -- South Africa
- Description: Although performers have been rife for centuries, no legal regime was required for their protection owing to the fact that the nature of their performances was transitory. It was not until the invention of the phonogram in 1877, that the need to provide performers with the means to protect the unauthorised uses of their performances became an issue. The subsequent development of performers' rights has been fuelled by the rapid technological developments of the modern age which has prompted the international community to respond through various international instruments. Performers initially sought protection in terms of the Berne Convention in 1886, but it was not until the Rome Convention in 1961 that performers were first accorded international recognition. This was followed by the TRIPs Agreement in 1994 and the WPPT in 1996. This work involves an investigation into the historical development of performers' rights in the United Kingdom and South Africa. This is followed by a comparative analysis of the current state of performers' rights as between the United Kingdom and South Africa with a view to proposing recommendations for improving the level of protection accorded performers in South Africa. Arguments in favour of a regime of performers' rights as well as possible counter-arguments have been advanced. The general development of performers' rights as a related or neighbouring right to copyright is focussed on. The development of performers' rights in the United Kingdom is discussed with reference to the first English legislative form of protection, namely the Dramatic and Musical Performers' Protection Act, 1925. This Act only provided performers with criminal remedies, a view that prevailed through several subsequent enactments designed to protect performers as a result of ratification of the Rome Convention. It was not until 1988 when the decision in Rickless v United Artists Corp prompted the legislature to grant performers with enforceable civil remedies through the enactment of the Copyright, Designs and Patents Act, 1988. Several European Union Council Directives aimed at harmonising the law relating to performers' rights throughout the Union were issued, mainly in response to the TRIPS Agreement. In order to comply with these Directives, the United Kingdom passed Regulations to bring about the necessary amendments to the Copyright, Designs and Patents Act. Performers in the United Kingdom were granted moral rights in 2006 as a result of the United Kingdom's ratification of the WPPT. The development of performers' rights in South Africa has been slow when compared to that of the United Kingdom. It was not until 1967 that performers were first legally recognised in South Africa. Although South Africa has yet to ratify the Rome Convention, it was stated in South African Broadcasting Corporation v Pollecutt that the Act was clearly passed with a view to complying with the Convention. South Africa's ratification of the TRIPs Agreement brought about amendments to the Act, particularly regarding the duration of protection which was increased from 20 to 50 years. Although South Africa played an active role in the conclusion of the WPPT, it has yet to ratify it. However, amendments were made to the Act in line with this Treaty, such as the incorporation of “expressions of folklore” within the ambit of protection, and the granting of a right to receive royalties whenever a performer's performances are broadcast. This is commonly known as needletime. South Africa's reluctance to grant performers with moral rights as provided for by the Treaty is noteworthy. The introduction of needletime into South African law has resulted in a fierce debate between collecting societies (who represent authors and performers) and the NAB (who represent users of performances). Mainly as a result of this dispute, performers in South Africa have, to date, not received any royalties due to them. The protection of traditional knowledge has also received attention of late with the Intellectual Property Laws Amendment Bill, 2010 which aims to bring traditional knowledge inter alia within the ambit of the Performers' Protection Act. The current state of performers' rights in the United Kingdom and South Africa are compared in order to identify ways in which the level of protection accorded performers in South Africa could be improved. The Copyright, Designs and Patents Act is compared with the Performers' Protection Act through emphasis being placed on the definition of a “performer”; the definition of a “performance”; the nature of performers' rights; exceptions to infringement; the term of protection; the retrospectivity of the legislation; and the enforcement measures in place. Upon analysis, it was found that the Performers' Protection Act can be amended in several ways in order to increase the level of protection accorded performers in South Africa.
- Full Text:
- Date Issued: 2011
- Authors: Wagenaar, Tanya
- Date: 2011
- Subjects: Copyright -- Performing rights -- Great Britain , Copyright -- Performing rights -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10215 , http://hdl.handle.net/10948/1442 , Copyright -- Performing rights -- Great Britain , Copyright -- Performing rights -- South Africa
- Description: Although performers have been rife for centuries, no legal regime was required for their protection owing to the fact that the nature of their performances was transitory. It was not until the invention of the phonogram in 1877, that the need to provide performers with the means to protect the unauthorised uses of their performances became an issue. The subsequent development of performers' rights has been fuelled by the rapid technological developments of the modern age which has prompted the international community to respond through various international instruments. Performers initially sought protection in terms of the Berne Convention in 1886, but it was not until the Rome Convention in 1961 that performers were first accorded international recognition. This was followed by the TRIPs Agreement in 1994 and the WPPT in 1996. This work involves an investigation into the historical development of performers' rights in the United Kingdom and South Africa. This is followed by a comparative analysis of the current state of performers' rights as between the United Kingdom and South Africa with a view to proposing recommendations for improving the level of protection accorded performers in South Africa. Arguments in favour of a regime of performers' rights as well as possible counter-arguments have been advanced. The general development of performers' rights as a related or neighbouring right to copyright is focussed on. The development of performers' rights in the United Kingdom is discussed with reference to the first English legislative form of protection, namely the Dramatic and Musical Performers' Protection Act, 1925. This Act only provided performers with criminal remedies, a view that prevailed through several subsequent enactments designed to protect performers as a result of ratification of the Rome Convention. It was not until 1988 when the decision in Rickless v United Artists Corp prompted the legislature to grant performers with enforceable civil remedies through the enactment of the Copyright, Designs and Patents Act, 1988. Several European Union Council Directives aimed at harmonising the law relating to performers' rights throughout the Union were issued, mainly in response to the TRIPS Agreement. In order to comply with these Directives, the United Kingdom passed Regulations to bring about the necessary amendments to the Copyright, Designs and Patents Act. Performers in the United Kingdom were granted moral rights in 2006 as a result of the United Kingdom's ratification of the WPPT. The development of performers' rights in South Africa has been slow when compared to that of the United Kingdom. It was not until 1967 that performers were first legally recognised in South Africa. Although South Africa has yet to ratify the Rome Convention, it was stated in South African Broadcasting Corporation v Pollecutt that the Act was clearly passed with a view to complying with the Convention. South Africa's ratification of the TRIPs Agreement brought about amendments to the Act, particularly regarding the duration of protection which was increased from 20 to 50 years. Although South Africa played an active role in the conclusion of the WPPT, it has yet to ratify it. However, amendments were made to the Act in line with this Treaty, such as the incorporation of “expressions of folklore” within the ambit of protection, and the granting of a right to receive royalties whenever a performer's performances are broadcast. This is commonly known as needletime. South Africa's reluctance to grant performers with moral rights as provided for by the Treaty is noteworthy. The introduction of needletime into South African law has resulted in a fierce debate between collecting societies (who represent authors and performers) and the NAB (who represent users of performances). Mainly as a result of this dispute, performers in South Africa have, to date, not received any royalties due to them. The protection of traditional knowledge has also received attention of late with the Intellectual Property Laws Amendment Bill, 2010 which aims to bring traditional knowledge inter alia within the ambit of the Performers' Protection Act. The current state of performers' rights in the United Kingdom and South Africa are compared in order to identify ways in which the level of protection accorded performers in South Africa could be improved. The Copyright, Designs and Patents Act is compared with the Performers' Protection Act through emphasis being placed on the definition of a “performer”; the definition of a “performance”; the nature of performers' rights; exceptions to infringement; the term of protection; the retrospectivity of the legislation; and the enforcement measures in place. Upon analysis, it was found that the Performers' Protection Act can be amended in several ways in order to increase the level of protection accorded performers in South Africa.
- Full Text:
- Date Issued: 2011
A comparative analysis of the intermediary systems in South Africa, Namibia, Zimbabwe and Ethiopia
- Authors: Wilkerson, Tendai Marowa
- Date: 2011
- Subjects: Juvenile courts -- South Africa , Juvenile courts -- Namibia , Juveline courts -- Zimbabwe , Juvenile courts -- Ethiopia , Children -- Legal status, laws, etc. -- South Africa , Children -- Legal status, laws, etc. -- Namibia , Children -- Legal status, laws, etc. -- Zimbabwe , Children -- Legal status, laws, etc. -- Ethiopia , Child witnesses -- South Africa , Child witnesses -- Namibia , Child witnesses -- Zimbabwe , Child witnesses -- Ethiopia , Mediation -- Law and legislation -- South Africa , Mediation -- Law and legislation -- Namibia , Mediation -- Law and legislation -- Zimbabwe , Mediation -- Law and legislation -- Ethiopia , Children's rights -- South Africa , Children's rights -- Namibia , Children's rights -- Zimbabwe , Children's rights -- Ethiopia
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3698 , http://hdl.handle.net/10962/d1003213 , Juvenile courts -- South Africa , Juvenile courts -- Namibia , Juveline courts -- Zimbabwe , Juvenile courts -- Ethiopia , Children -- Legal status, laws, etc. -- South Africa , Children -- Legal status, laws, etc. -- Namibia , Children -- Legal status, laws, etc. -- Zimbabwe , Children -- Legal status, laws, etc. -- Ethiopia , Child witnesses -- South Africa , Child witnesses -- Namibia , Child witnesses -- Zimbabwe , Child witnesses -- Ethiopia , Mediation -- Law and legislation -- South Africa , Mediation -- Law and legislation -- Namibia , Mediation -- Law and legislation -- Zimbabwe , Mediation -- Law and legislation -- Ethiopia , Children's rights -- South Africa , Children's rights -- Namibia , Children's rights -- Zimbabwe , Children's rights -- Ethiopia
- Description: Prior to 1990, very few countries in the world offered special protection to child witnesses interfacing with the justice system. There were no legal provisions permitting testimonial accommodations for children in court. The courtroom experience was significantly traumatic for the children. With the international focus shifting from protecting and upholding the rights of the accused in the courtroom towards a more victim-centred approach, various international and regional instruments have strongly dvocated that children deserve special protection because of their vulnerability. In order for the courts to be able to elicit accurate evidence from the child without further traumatizing the child, research has shown that the child needs assistance. An intermediary may be defined as a person who facilitates communication between the child and the courtroom in a manner that takes into account the child‟s cognitive and developmental limitations. The thesis was prompted by the need to make a contribution to the currently limited body of literature on the intermediary systems in South Africa, Namibia, Zimbabwe and Ethiopia by investigating how the systems can be improved and sustained in a way that helps to protect the child witness in court. Despite the problems the South African courts have had in identifying the appropriate interpretation of its intermediary legislation, the country emerges as a clear leader for the steps it took by creating a positive legal framework within which child protection issues are addressed and introducing the concept of the intermediary. This concept proved to be an inspiration to its neighbours, Namibia and Zimbabwe. The influence of the South African intermediary legislation is evident in the Namibian and Zimbabwean legislation. Although Namibian legislators have drafted laws that permit intermediary assistance in court, there are as yet no intermediaries appointed. In Ethiopia, although there is no discernible intermediary legislation, the country has managed to establish an intermediary system. As a result of the analysis conducted, it is evident that the efficacy of the intermediary system is dependent on the presence of an enabling legislation, its clarity and ease of interpretation, the sensitisation of court role players on child vulnerabilities, the significance of intermediary assistance, and finally a government's commitment towards the implementation process.
- Full Text:
- Date Issued: 2011
- Authors: Wilkerson, Tendai Marowa
- Date: 2011
- Subjects: Juvenile courts -- South Africa , Juvenile courts -- Namibia , Juveline courts -- Zimbabwe , Juvenile courts -- Ethiopia , Children -- Legal status, laws, etc. -- South Africa , Children -- Legal status, laws, etc. -- Namibia , Children -- Legal status, laws, etc. -- Zimbabwe , Children -- Legal status, laws, etc. -- Ethiopia , Child witnesses -- South Africa , Child witnesses -- Namibia , Child witnesses -- Zimbabwe , Child witnesses -- Ethiopia , Mediation -- Law and legislation -- South Africa , Mediation -- Law and legislation -- Namibia , Mediation -- Law and legislation -- Zimbabwe , Mediation -- Law and legislation -- Ethiopia , Children's rights -- South Africa , Children's rights -- Namibia , Children's rights -- Zimbabwe , Children's rights -- Ethiopia
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3698 , http://hdl.handle.net/10962/d1003213 , Juvenile courts -- South Africa , Juvenile courts -- Namibia , Juveline courts -- Zimbabwe , Juvenile courts -- Ethiopia , Children -- Legal status, laws, etc. -- South Africa , Children -- Legal status, laws, etc. -- Namibia , Children -- Legal status, laws, etc. -- Zimbabwe , Children -- Legal status, laws, etc. -- Ethiopia , Child witnesses -- South Africa , Child witnesses -- Namibia , Child witnesses -- Zimbabwe , Child witnesses -- Ethiopia , Mediation -- Law and legislation -- South Africa , Mediation -- Law and legislation -- Namibia , Mediation -- Law and legislation -- Zimbabwe , Mediation -- Law and legislation -- Ethiopia , Children's rights -- South Africa , Children's rights -- Namibia , Children's rights -- Zimbabwe , Children's rights -- Ethiopia
- Description: Prior to 1990, very few countries in the world offered special protection to child witnesses interfacing with the justice system. There were no legal provisions permitting testimonial accommodations for children in court. The courtroom experience was significantly traumatic for the children. With the international focus shifting from protecting and upholding the rights of the accused in the courtroom towards a more victim-centred approach, various international and regional instruments have strongly dvocated that children deserve special protection because of their vulnerability. In order for the courts to be able to elicit accurate evidence from the child without further traumatizing the child, research has shown that the child needs assistance. An intermediary may be defined as a person who facilitates communication between the child and the courtroom in a manner that takes into account the child‟s cognitive and developmental limitations. The thesis was prompted by the need to make a contribution to the currently limited body of literature on the intermediary systems in South Africa, Namibia, Zimbabwe and Ethiopia by investigating how the systems can be improved and sustained in a way that helps to protect the child witness in court. Despite the problems the South African courts have had in identifying the appropriate interpretation of its intermediary legislation, the country emerges as a clear leader for the steps it took by creating a positive legal framework within which child protection issues are addressed and introducing the concept of the intermediary. This concept proved to be an inspiration to its neighbours, Namibia and Zimbabwe. The influence of the South African intermediary legislation is evident in the Namibian and Zimbabwean legislation. Although Namibian legislators have drafted laws that permit intermediary assistance in court, there are as yet no intermediaries appointed. In Ethiopia, although there is no discernible intermediary legislation, the country has managed to establish an intermediary system. As a result of the analysis conducted, it is evident that the efficacy of the intermediary system is dependent on the presence of an enabling legislation, its clarity and ease of interpretation, the sensitisation of court role players on child vulnerabilities, the significance of intermediary assistance, and finally a government's commitment towards the implementation process.
- Full Text:
- Date Issued: 2011
A comparison of the Botswana and South African labour dispute: resolution systems
- Koorapetse, Michael Moemedi Sean
- Authors: Koorapetse, Michael Moemedi Sean
- Date: 2011
- Subjects: Labor disputes , Labor relations , Conflict management , Dispute resolution (Law)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9429 , http://hdl.handle.net/10948/d1010556 , Labor disputes , Labor relations , Conflict management , Dispute resolution (Law)
- Description: The purpose of this study was to compare the dispute resolution systems of Botswana and South Africa. As far as the South Africa dispute resolution system is concerned extensive literature on the system was carried out to describe its functioning. As for the Botswana dispute resolution system there was not much written about it in the literature, so in order to find out more about this system semi-structured interviews with labour relations experts which include mediators, arbitrators, lecturers, labour lawyers, trade unionists, employers and government officials held. The framework of comparison was developed to compare the elements of dispute resolution systems against each other and secondly to compare each system against the criteria of performance to the system. The two labour relations systems were compared in terms of elements of the system and the performance of the two systems. In the comparisons of the elements of the systems it was found out that in both systems the nature of disputes was collective and individual disputes both of which can be referred to the initial process of mediation or conciliation. However, in Botswana collective disputes can only be referred to arbitration if they remain unresolved in mediation while in South Africa only collective disputes on essential services go to arbitration while others lead to a strike or lockout if unresolved at conciliation. As for coverage both systems have incorporated public service sector employees in the systems after being excluded from the system for a very long time. The only difference is that in Botswana the Police force is not included while in South Africa they are included in the system. Differences in the avenues of disputes in the two countries were noted, in Botswana the rights/individual disputes go to either arbitration or Industrial Court if unresolved at mediation, inter-est/collective disputes can only go to arbitration while in South Africa the route of disputes is specified in the legislation. As for the human resources of the two countries it was found that the South African system has more qualified, trained and sufficiently experienced staff than the Botswana system. As for the processes it was found that for South Africa the initial process is conciliation while in Botswana it is mediation but these two processes were similar in many ways, from mediation/conciliation the next step in both systems is arbitration and just like the conciliation/mediation, arbitration in both countries was found to be similar except that in South Africa it is a public hearing. The two systems were also compared in terms of their performances and the research has established that between the two systems the South African system proved to be more superior on three of the criteria; efficiency, accessibility and legitimacy than the Botswana system. Therefore, the research proposes a number of recommendations for Botswana to implement namely; establishment of a legislated mixed process of mediation-arbitration, making the dispute resolution system independent from government, recruitment of high qualified and experienced staff for mediation and arbitration, accreditation to private agencies, effective case management system and proper routing of disputes.
- Full Text:
- Date Issued: 2011
- Authors: Koorapetse, Michael Moemedi Sean
- Date: 2011
- Subjects: Labor disputes , Labor relations , Conflict management , Dispute resolution (Law)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9429 , http://hdl.handle.net/10948/d1010556 , Labor disputes , Labor relations , Conflict management , Dispute resolution (Law)
- Description: The purpose of this study was to compare the dispute resolution systems of Botswana and South Africa. As far as the South Africa dispute resolution system is concerned extensive literature on the system was carried out to describe its functioning. As for the Botswana dispute resolution system there was not much written about it in the literature, so in order to find out more about this system semi-structured interviews with labour relations experts which include mediators, arbitrators, lecturers, labour lawyers, trade unionists, employers and government officials held. The framework of comparison was developed to compare the elements of dispute resolution systems against each other and secondly to compare each system against the criteria of performance to the system. The two labour relations systems were compared in terms of elements of the system and the performance of the two systems. In the comparisons of the elements of the systems it was found out that in both systems the nature of disputes was collective and individual disputes both of which can be referred to the initial process of mediation or conciliation. However, in Botswana collective disputes can only be referred to arbitration if they remain unresolved in mediation while in South Africa only collective disputes on essential services go to arbitration while others lead to a strike or lockout if unresolved at conciliation. As for coverage both systems have incorporated public service sector employees in the systems after being excluded from the system for a very long time. The only difference is that in Botswana the Police force is not included while in South Africa they are included in the system. Differences in the avenues of disputes in the two countries were noted, in Botswana the rights/individual disputes go to either arbitration or Industrial Court if unresolved at mediation, inter-est/collective disputes can only go to arbitration while in South Africa the route of disputes is specified in the legislation. As for the human resources of the two countries it was found that the South African system has more qualified, trained and sufficiently experienced staff than the Botswana system. As for the processes it was found that for South Africa the initial process is conciliation while in Botswana it is mediation but these two processes were similar in many ways, from mediation/conciliation the next step in both systems is arbitration and just like the conciliation/mediation, arbitration in both countries was found to be similar except that in South Africa it is a public hearing. The two systems were also compared in terms of their performances and the research has established that between the two systems the South African system proved to be more superior on three of the criteria; efficiency, accessibility and legitimacy than the Botswana system. Therefore, the research proposes a number of recommendations for Botswana to implement namely; establishment of a legislated mixed process of mediation-arbitration, making the dispute resolution system independent from government, recruitment of high qualified and experienced staff for mediation and arbitration, accreditation to private agencies, effective case management system and proper routing of disputes.
- Full Text:
- Date Issued: 2011
A comprehensive evaluation framework for system modernization : a case study using data services
- Authors: Barnes, Meredith Anne
- Date: 2011
- Subjects: Computer architecture
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10460 , http://hdl.handle.net/10948/1499 , Computer architecture
- Description: Modernization is a solution to migrate cumbersome existing systems to a new architecture for improved longevity of business processes. Three modernization approaches exist. White-box and black-box modernization are distinct from one another. Grey-box modernization is a hybrid of the white-box and black-box approaches. Modernization can be utilised to create data services for a Service Oriented Architecture. Since it is unclear which modernization approach is more suitable for the development of data services, a comprehensive evaluation framework is proposed to evaluate which of the white- or black-box approaches is more suitable. The comprehensive framework consists of three evaluation components. Firstly, developer effort to modernize existing code is measured by acknowledged software metrics. Secondly, the quality of the data services is measured against identified Quality of Service criteria for data services in particular. Thirdly, the effectiveness of the modernized data services is measured through usability evaluations. By inspection of the combination of application of each of the evaluation components, a recommended approach is identified for the modernization of data services. The comprehensive framework was successfully employed to compare the white-box and black-box modernization approaches applied to a case study. Results indicated that had only a single evaluation component been used, inconclusive results of the more suitable approach may have been obtained. The findings of this research contribute a comprehensive evaluation framework which can be applied to compare modernization approaches and measure modernization success.
- Full Text:
- Date Issued: 2011
- Authors: Barnes, Meredith Anne
- Date: 2011
- Subjects: Computer architecture
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10460 , http://hdl.handle.net/10948/1499 , Computer architecture
- Description: Modernization is a solution to migrate cumbersome existing systems to a new architecture for improved longevity of business processes. Three modernization approaches exist. White-box and black-box modernization are distinct from one another. Grey-box modernization is a hybrid of the white-box and black-box approaches. Modernization can be utilised to create data services for a Service Oriented Architecture. Since it is unclear which modernization approach is more suitable for the development of data services, a comprehensive evaluation framework is proposed to evaluate which of the white- or black-box approaches is more suitable. The comprehensive framework consists of three evaluation components. Firstly, developer effort to modernize existing code is measured by acknowledged software metrics. Secondly, the quality of the data services is measured against identified Quality of Service criteria for data services in particular. Thirdly, the effectiveness of the modernized data services is measured through usability evaluations. By inspection of the combination of application of each of the evaluation components, a recommended approach is identified for the modernization of data services. The comprehensive framework was successfully employed to compare the white-box and black-box modernization approaches applied to a case study. Results indicated that had only a single evaluation component been used, inconclusive results of the more suitable approach may have been obtained. The findings of this research contribute a comprehensive evaluation framework which can be applied to compare modernization approaches and measure modernization success.
- Full Text:
- Date Issued: 2011