Biotic and abiotic factors promoting the development and proliferation of water hyacinth (eichhornia crassipes (Mart.) Solms-Laub.) in the Wouri Basin (Douala-Cameroon) and environs, with implications for its control
- Voukeng, Sonia Nadege Kenfack
- Authors: Voukeng, Sonia Nadege Kenfack
- Date: 2017
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/7644 , vital:21281
- Description: The Wouri River, situated in the Wouri Basin, is one of the main rivers of the Littoral Region in the city of Douala in Cameroon. It is a source of income and food for the population living around these areas. Since the 1990s, the fishing, transportation, irrigation and sand extraction activities have been impeded by the invasion of aquatic plants, specifically water hyacinth (Eichhornia crassipes [Mart.] Solms-Laubach: Pontederiaceae). Introduced in 1997 to the shore of Lake Chad, water hyacinth has invaded almost 114 ha of the Wouri Basin. Furthermore, Douala, the economic capital of the Cameroon and location for more than 70% of the country’s industries, uses the Wouri River and its tributaries to deposit its effluent and waste, which has worsened the problem of water hyacinth. This thesis examined the ecological and socio-economic impacts of water hyacinth in the Wouri Basin and its possible control. An increase in the nutrients in the water has provided water hyacinth with appropriate conditions for its fast growth during both the rainy and dry seasons. The availability of nutrients in these areas is enhanced by the constant, daily tidal fluctuation of water, providing enough water to the plant for easy nutrient uptake. A survey of the impacts of water hyacinth on aquatic plant communities in the Wouri Basin showed that this plant is able to out-compete native species. Assessment of the impact of water hyacinth on the abundance and diversity of plant communities indicated that at some invaded sites, 65% of the vegetation consisted of water hyacinth. Species found in association with water hyacinth with a high level of abundance-dominance were Pistia stratiotes L. (Araceae) (another invader), Commelina benghalensis L. (Commelinaceae) and Echinochloa pyramidalis (Lam.) Hitchc. & Chase (Poaceae). This component of the study also showed that habitats rich in water hyacinth were poor in diversity, while habitats without water hyacinth were rich in diversity, thus raising awareness of the importance of monitoring invasive aquatic weeds along the Wouri Basin, and of implementing correct control management of all invasive aquatic weeds. Communities living along the invaded rivers are well aware of the range of problems caused by the weed; because as the rivers and water bodies used for fishing, transportation, and sand extraction are progressively invaded by the weed, the riparian population is the first to feel the impact. The impact on people has been noticeable, with an increase in diseases, such as malaria, cholera, diarrhoea, typhoid, filariasis, schistosomiasis, scabies and yellow fever increasing the need for a medicine and hospitalization. Economic losses due to the management of invasive aquatic weeds were recorded, and the Ministry of Environment spent an estimated US$1 200 000 between 2010 and 2015 to manage this scourge. In 2016, an amount of US$160 000 was transferred to these regions to manage invasive aquatic weeds, especially water hyacinth, although manual clearing is still the only method used to control this weed. Isolation of fungi from diseased water hyacinth plants in the Wouri Basin revealed several fungal species, most of which have been isolated from water hyacinth species in water bodies elsewhere, which showed a higher diversity during the dry season than during the rainy season. These fungi included Acremonium zonatum (Sawada). W. Gams (Hypocreaceae), Alternaria eichhorniae Nag Raj & Ponnappa (Pleosporaceae), Chaetomium sp., Colletotrichum sp., Curvularia pallescens Boedjin (Pleosporaceae), Curvalaria sp., Epicoccum nigrum Link (Pleosporaceae), Fusarium sp., Pithomyces chartarum fBerk. & M. A. Curtis) M. B. Ellis (Montagnulaceae), to a lesser extent Myrothecium roridum Tode ex Fr. (Incertae sedis) and Nigrospora sp. Although never released in Cameroon, arthropod biological control agents (Neochetina eichhorniae Warner (Coleoptera, Curculionidae) and N. bruchi Hustache (Coleoptera, Curculionidae)) were present, but their populations were relatively low. The slow spread of the insect population was explained by several factors, among them the tidal fluctuation of water, which has an impact on the population growth of the weevils. Whilst adults may be able to survive tidal fluctuations, larvae are severely impacted by them, contributing to the slow success of biological control. In this study, a significant increase in pathogen-induced disease severity and incidence was noted when Neochetina eichhorniae weevils were present, possibly because larvae tunnelling on the petiole created openings for the penetration of fungal spores. This study highlights the negative impacts of water hyacinth, on the environment, people, and thus economy of Cameroon. The presence of biological control agents and pathogens offers Cameroon the possibility of initiating and properly implementing the biological control option, or an integrated management solution, to manage water hyacinth in the Wouri Basin, and in the rest of Cameroon.
- Full Text:
- Date Issued: 2017
- Authors: Voukeng, Sonia Nadege Kenfack
- Date: 2017
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/7644 , vital:21281
- Description: The Wouri River, situated in the Wouri Basin, is one of the main rivers of the Littoral Region in the city of Douala in Cameroon. It is a source of income and food for the population living around these areas. Since the 1990s, the fishing, transportation, irrigation and sand extraction activities have been impeded by the invasion of aquatic plants, specifically water hyacinth (Eichhornia crassipes [Mart.] Solms-Laubach: Pontederiaceae). Introduced in 1997 to the shore of Lake Chad, water hyacinth has invaded almost 114 ha of the Wouri Basin. Furthermore, Douala, the economic capital of the Cameroon and location for more than 70% of the country’s industries, uses the Wouri River and its tributaries to deposit its effluent and waste, which has worsened the problem of water hyacinth. This thesis examined the ecological and socio-economic impacts of water hyacinth in the Wouri Basin and its possible control. An increase in the nutrients in the water has provided water hyacinth with appropriate conditions for its fast growth during both the rainy and dry seasons. The availability of nutrients in these areas is enhanced by the constant, daily tidal fluctuation of water, providing enough water to the plant for easy nutrient uptake. A survey of the impacts of water hyacinth on aquatic plant communities in the Wouri Basin showed that this plant is able to out-compete native species. Assessment of the impact of water hyacinth on the abundance and diversity of plant communities indicated that at some invaded sites, 65% of the vegetation consisted of water hyacinth. Species found in association with water hyacinth with a high level of abundance-dominance were Pistia stratiotes L. (Araceae) (another invader), Commelina benghalensis L. (Commelinaceae) and Echinochloa pyramidalis (Lam.) Hitchc. & Chase (Poaceae). This component of the study also showed that habitats rich in water hyacinth were poor in diversity, while habitats without water hyacinth were rich in diversity, thus raising awareness of the importance of monitoring invasive aquatic weeds along the Wouri Basin, and of implementing correct control management of all invasive aquatic weeds. Communities living along the invaded rivers are well aware of the range of problems caused by the weed; because as the rivers and water bodies used for fishing, transportation, and sand extraction are progressively invaded by the weed, the riparian population is the first to feel the impact. The impact on people has been noticeable, with an increase in diseases, such as malaria, cholera, diarrhoea, typhoid, filariasis, schistosomiasis, scabies and yellow fever increasing the need for a medicine and hospitalization. Economic losses due to the management of invasive aquatic weeds were recorded, and the Ministry of Environment spent an estimated US$1 200 000 between 2010 and 2015 to manage this scourge. In 2016, an amount of US$160 000 was transferred to these regions to manage invasive aquatic weeds, especially water hyacinth, although manual clearing is still the only method used to control this weed. Isolation of fungi from diseased water hyacinth plants in the Wouri Basin revealed several fungal species, most of which have been isolated from water hyacinth species in water bodies elsewhere, which showed a higher diversity during the dry season than during the rainy season. These fungi included Acremonium zonatum (Sawada). W. Gams (Hypocreaceae), Alternaria eichhorniae Nag Raj & Ponnappa (Pleosporaceae), Chaetomium sp., Colletotrichum sp., Curvularia pallescens Boedjin (Pleosporaceae), Curvalaria sp., Epicoccum nigrum Link (Pleosporaceae), Fusarium sp., Pithomyces chartarum fBerk. & M. A. Curtis) M. B. Ellis (Montagnulaceae), to a lesser extent Myrothecium roridum Tode ex Fr. (Incertae sedis) and Nigrospora sp. Although never released in Cameroon, arthropod biological control agents (Neochetina eichhorniae Warner (Coleoptera, Curculionidae) and N. bruchi Hustache (Coleoptera, Curculionidae)) were present, but their populations were relatively low. The slow spread of the insect population was explained by several factors, among them the tidal fluctuation of water, which has an impact on the population growth of the weevils. Whilst adults may be able to survive tidal fluctuations, larvae are severely impacted by them, contributing to the slow success of biological control. In this study, a significant increase in pathogen-induced disease severity and incidence was noted when Neochetina eichhorniae weevils were present, possibly because larvae tunnelling on the petiole created openings for the penetration of fungal spores. This study highlights the negative impacts of water hyacinth, on the environment, people, and thus economy of Cameroon. The presence of biological control agents and pathogens offers Cameroon the possibility of initiating and properly implementing the biological control option, or an integrated management solution, to manage water hyacinth in the Wouri Basin, and in the rest of Cameroon.
- Full Text:
- Date Issued: 2017
Development of graphene materials and phthalocyanines for application in dye-sensitized solar cells
- Authors: Chindeka, Francis
- Date: 2020
- Subjects: Dye-sensitized solar cells , Graphene , Phthalocyanines , Molecular orbitals , Impedance spectroscopy
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/166092 , vital:41328
- Description: Two sets of dye-sensitized solar cells (DSSCs) were fabricated. In the first set, dye-sensitized solar cells (DSSC) were fabricated by incorporating graphene materials as catalysts at the counter electrode. Platinum was also used as a catalyst for comparative purposes. Different phthalocyanines: hydroxyl indium tetracarboxyphenoxy phthalocyanine (1), chloro indium octacarboxy phthalocyanine (2) and dibenzoic acid silicon phthalocyanine (3) were used as dyes. Complex 3 gave the highest power conversion efficiency (η) of 3.19% when using nitrogen doped reduced graphene oxide nanosheets (NrGONS) as a catalyst at the counter electrode, and TiO2 containing rGONS at the anode. The value obtained is close to 3.8% obtained when using Pt catalyst instead of NrGONS at the cathode, thus confirming that NrGONS is a promising candidate to replace the more expensive Pt. The study also shows that placing rGONS on both the anode and cathode improves efficiency. In the second set, DSSCs were fabricated by using 2(3,5-biscarboxyphenoxy), 9(10), 16(17), 23(24)-tri(tertbutyl) phthalocyaninato Cu (4) and Zn (5) complexes as dyes on the ITO-TiO2 photoanodes containing reduced graphene oxide nanosheets (rGONS) or nitrogen-doped rGONS (NrGONS). The evaluation of the assembled DSSCs revealed that using ITO-TiO2-NrGONS-CuPc (4) photoanode had the highest fill factor (FF) and power conversion efficiency (ɳ) of 69 % and 4.36 % respectively. These results show that the asymmetrical phthalocyanine complexes (4) and (5) showed significant improvement on the performance of the DSSC compared to previous work on symmetrical carboxylated phthalocyanines with ɳ = 3.19%.
- Full Text:
- Date Issued: 2020
- Authors: Chindeka, Francis
- Date: 2020
- Subjects: Dye-sensitized solar cells , Graphene , Phthalocyanines , Molecular orbitals , Impedance spectroscopy
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/166092 , vital:41328
- Description: Two sets of dye-sensitized solar cells (DSSCs) were fabricated. In the first set, dye-sensitized solar cells (DSSC) were fabricated by incorporating graphene materials as catalysts at the counter electrode. Platinum was also used as a catalyst for comparative purposes. Different phthalocyanines: hydroxyl indium tetracarboxyphenoxy phthalocyanine (1), chloro indium octacarboxy phthalocyanine (2) and dibenzoic acid silicon phthalocyanine (3) were used as dyes. Complex 3 gave the highest power conversion efficiency (η) of 3.19% when using nitrogen doped reduced graphene oxide nanosheets (NrGONS) as a catalyst at the counter electrode, and TiO2 containing rGONS at the anode. The value obtained is close to 3.8% obtained when using Pt catalyst instead of NrGONS at the cathode, thus confirming that NrGONS is a promising candidate to replace the more expensive Pt. The study also shows that placing rGONS on both the anode and cathode improves efficiency. In the second set, DSSCs were fabricated by using 2(3,5-biscarboxyphenoxy), 9(10), 16(17), 23(24)-tri(tertbutyl) phthalocyaninato Cu (4) and Zn (5) complexes as dyes on the ITO-TiO2 photoanodes containing reduced graphene oxide nanosheets (rGONS) or nitrogen-doped rGONS (NrGONS). The evaluation of the assembled DSSCs revealed that using ITO-TiO2-NrGONS-CuPc (4) photoanode had the highest fill factor (FF) and power conversion efficiency (ɳ) of 69 % and 4.36 % respectively. These results show that the asymmetrical phthalocyanine complexes (4) and (5) showed significant improvement on the performance of the DSSC compared to previous work on symmetrical carboxylated phthalocyanines with ɳ = 3.19%.
- Full Text:
- Date Issued: 2020
BODIPY dyes for singlet oxygen and optical limiting applications
- Authors: Harris, Jessica
- Date: 2018
- Subjects: Photosensitizing compounds , Active oxygen -- Physiological effect , Photochemotherapy , Cancer -- Treatment , Nonlinear optics , BODIPY (Boron-dipyrromethene)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/58002 , vital:27014
- Description: A series of structurally related BODIPY dyes were synthesised and characterised. Their photophysical properties were studied in order to determine whether they would be suitable candidates for use as photosensitisers in the photodynamic therapy (PDT) treatment of cancer. The synthesis of two highly fluorescent BODIPY cores was achieved via the acid-catalysed condensation of a pyrrole and a functionalised aldehyde. In order to promote intersystem crossing, and hence improve the singlet oxygen generation of these dyes, bromine atoms were added at the 2,6-positions of the BODIPY core. These dibrominated analogues showed good singlet oxygen quantum yields, and excellent photostability in ethanol. In order to red-shift the main spectral bands of the BODIPY dyes towards the therapeutic window, vinyl/ styryl groups were introduced at the 3-, 5-, and 7-positions via a modified Knoevengal condensation reaction. The addition of vinyl/ styryl groups to the BODIPY core caused an increase in fluorescence quantum yield as well as a decrease in singlet oxygen quantum yield with respect to the dibrominated analogues. However, two of the red-shifted BODIPY dyes still showed moderate singlet oxygen quantum yields. The use of BODIPY dyes in nonlinear optics (NLO) was explored. The nonlinear optical characterisations and optical limiting properties of a series of 3,5-dithienylenevinylene BODIPY dyes were studied, both in dimethylformamide (DMF) solution and when embedded in poly(bisphenol A carbonate) (PBC) as thin films. The 3,5-dithienylenevinylene BODIPY dyes showed typical nonlinear absorption behaviour, with reverse saturable absorption (RSA) profiles, indicating that they have potential as optical limiters. The second-order hyperpolarizability (Y), and third-order nonlinear susceptibility (/m[/(3)]) values are also reported for these dyes. The optical limiting values of one of the BODIPY dyes in solution, and two of the BODIPY-embedded PBC films, were below the maximum threshold of 0.95 J-cm-2. The effect of addition of substituents on the electronic structure of the BODIPY dyes was investigated using TD-DFT calculations. The calculated trends closely followed those determined experimentally.
- Full Text:
- Date Issued: 2018
- Authors: Harris, Jessica
- Date: 2018
- Subjects: Photosensitizing compounds , Active oxygen -- Physiological effect , Photochemotherapy , Cancer -- Treatment , Nonlinear optics , BODIPY (Boron-dipyrromethene)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/58002 , vital:27014
- Description: A series of structurally related BODIPY dyes were synthesised and characterised. Their photophysical properties were studied in order to determine whether they would be suitable candidates for use as photosensitisers in the photodynamic therapy (PDT) treatment of cancer. The synthesis of two highly fluorescent BODIPY cores was achieved via the acid-catalysed condensation of a pyrrole and a functionalised aldehyde. In order to promote intersystem crossing, and hence improve the singlet oxygen generation of these dyes, bromine atoms were added at the 2,6-positions of the BODIPY core. These dibrominated analogues showed good singlet oxygen quantum yields, and excellent photostability in ethanol. In order to red-shift the main spectral bands of the BODIPY dyes towards the therapeutic window, vinyl/ styryl groups were introduced at the 3-, 5-, and 7-positions via a modified Knoevengal condensation reaction. The addition of vinyl/ styryl groups to the BODIPY core caused an increase in fluorescence quantum yield as well as a decrease in singlet oxygen quantum yield with respect to the dibrominated analogues. However, two of the red-shifted BODIPY dyes still showed moderate singlet oxygen quantum yields. The use of BODIPY dyes in nonlinear optics (NLO) was explored. The nonlinear optical characterisations and optical limiting properties of a series of 3,5-dithienylenevinylene BODIPY dyes were studied, both in dimethylformamide (DMF) solution and when embedded in poly(bisphenol A carbonate) (PBC) as thin films. The 3,5-dithienylenevinylene BODIPY dyes showed typical nonlinear absorption behaviour, with reverse saturable absorption (RSA) profiles, indicating that they have potential as optical limiters. The second-order hyperpolarizability (Y), and third-order nonlinear susceptibility (/m[/(3)]) values are also reported for these dyes. The optical limiting values of one of the BODIPY dyes in solution, and two of the BODIPY-embedded PBC films, were below the maximum threshold of 0.95 J-cm-2. The effect of addition of substituents on the electronic structure of the BODIPY dyes was investigated using TD-DFT calculations. The calculated trends closely followed those determined experimentally.
- Full Text:
- Date Issued: 2018
The impact of the cultural and creative industries on the economic growth and development of small cities and towns - guidelines for creating a regional cultural policy
- Authors: Ndhlovu, Raymond
- Date: 2018
- Subjects: Cultural industries -- South Africa , Cultural industries -- Economic aspects -- South Africa , Cultural policy , South Africa -- Economic conditions , Economic development -- South Africa -- Eastern Cape , South Africa. Department of Arts and Culture , Standard Bank National Arts Festival
- Language: English
- Type: text , Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/61524 , vital:28032
- Description: The arts and cultural sector has come under even more financial strain than it previously was, as it has to compete with other sectors of the economy for the very limited public funding that is available. It is in this context that the economic impact, and the role, of the arts and cultural sector towards advancing economic growth and development, needs be examined. This thesis investigates the potential for the positive impact of the cultural and creative industries (CCIs) on growth and development of small cities and towns. Furthermore, it also provides guidelines for the development of regional cultural policy in small cities and towns. The CCIs have also been touted as a catalyst for economic growth and economic development, hence the global rise in their interest. For example, the CCIs have been used to redevelop and revive urban areas that have been rundown. CCIs, however, tend to develop in clusters, and additionally, they cluster around large cities. However, the lack of reliance of some CCIs on long supply chains or high-technology inputs may make them suitable candidates for investment in small cities and towns. Additionally, the link that small cities and towns have with rural and isolated areas makes them potential engines for driving growth, development, as well as employment creation for these areas, given their decline as a result of the transition from the traditional agricultural economy, to the knowledge economy. As CCIs have the propensity to drive government’s macroeconomic objectives such as efficiency, equity, economic growth and job creation, it is necessary to develop cultural policy that regards this. The tendency of CCIs to cluster and develop around large cities inevitably means that very little research into cultural policy directed towards regions without large cities and towns has been done. By the same token, very little research has also been conducted on how to craft cultural policy for such areas. In order then, for cultural policy for regions without large cities and towns to be developed, it is necessary to investigate, and provide, guidelines on, how to develop cultural policy for such regions. As a case study, the Sarah Baartman District Municipality (SBDM) in the Eastern Cape was chosen. The SBDM has no large cities and towns, but the District Municipality has identified the CCIs as a potential growth sector, and is in the process of developing a regional cultural policy. The area also includes Grahamstown, which not only hosts the National Arts Festival, which is the largest arts event of its type in Africa, but is also piloting the “Creative City” project in South Africa. An audit and mapping study was conducted on the CCIs in the SBDM; this was based on a national mapping study commissioned by the Department of Arts and Culture. Further internet searches, as well as consultations with the provincial and regional Department of Arts of Culture, coupled with snowball sampling, also aided in the identification of CCIs, and consequently, the “creative hotspots” within the SBDM. Two random samples of stakeholders were chosen; the CCI owners and practitioners, as well as key stakeholders such as government officials, and interviews conducted with both groups, in order to get a first-hand perspective on the operations, activities, challenges, and opportunities that are faced by the CCIs. The study found that there were at least 441 CCIs in the SBDM, with two local municipalities (Dr. Beyers Naude and Makana) hosting the largest share of these (145 and 113 CCIs in each local municipality respectively), which indicates some support for the ‘clustering’ theory. It was also found that the local municipalities that had the largest number of CCIs also experienced better socio-economic welfare. Furthermore, based on the UNESCO Framework for Cultural Statistics (FCS) domains, the Visual Arts and Crafts; Information, Books and Press; and, Cultural Heritage domains were the largest domains represented in the SBDM. It was concluded that cultural policy that is developed, ought to take advantage of, and build on, these existing clusters, as well as the domains that are most prevalent in the region. To demonstrate the impact of cultural festivals on growth and development, a socio-economic impact study was undertaken at the 2016 National Arts Festival (NAF) in Grahamstown. Face to interviews, as well as self-completion questionnaires were used, with respondents at different venues, attending a variety of shows, and across a range of demographics, being interviewed, in order to get a representative sample of Festival attendees. It was found that the economic impact of the 2016 NAF on the city of Grahamstown was R94.4 million. Over and above the economic value of the NAF, it was also found that there were nonmarket benefits (social and intrinsic values) of the NAF, that included audience development, education of the arts and culture, social cohesion, and community development. The inability to directly track and measure social and intrinsic values proved to be a challenge. The study concluded that in order for successful cultural policy to be developed in regions without large cities and towns, it is first necessary to carry out a study to identify what resources are present, and where they are. Locating resources enables cluster identification - as clusters encourage comparative and competitive advantage, it is worthwhile to invest in areas where there are clusters. Therefore, in the allocation of scarce public funds, cultural policy needs to guide investment in to areas where established clusters indicate existing comparative advantage. In terms of equity and transformation, it is also necessary to evaluate labour markets and ownership patterns when developing cultural policy. Beyond the analysis of physical and human resources, the study also found that a crucial step towards developing successful cultural policy is identification of opportunities and challenges faced by the practitioners themselves; the policy ought to capitalise on the opportunities, whilst attempting to correct the challenges faced. Also of importance is aligning the proposed policy and its objectives with regional, provincial and national aims and objectives. Finally, it is important to include a monitoring and evaluation tool that will evaluate the performance of the policy against its stated aims and objectives.
- Full Text:
- Date Issued: 2018
- Authors: Ndhlovu, Raymond
- Date: 2018
- Subjects: Cultural industries -- South Africa , Cultural industries -- Economic aspects -- South Africa , Cultural policy , South Africa -- Economic conditions , Economic development -- South Africa -- Eastern Cape , South Africa. Department of Arts and Culture , Standard Bank National Arts Festival
- Language: English
- Type: text , Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/61524 , vital:28032
- Description: The arts and cultural sector has come under even more financial strain than it previously was, as it has to compete with other sectors of the economy for the very limited public funding that is available. It is in this context that the economic impact, and the role, of the arts and cultural sector towards advancing economic growth and development, needs be examined. This thesis investigates the potential for the positive impact of the cultural and creative industries (CCIs) on growth and development of small cities and towns. Furthermore, it also provides guidelines for the development of regional cultural policy in small cities and towns. The CCIs have also been touted as a catalyst for economic growth and economic development, hence the global rise in their interest. For example, the CCIs have been used to redevelop and revive urban areas that have been rundown. CCIs, however, tend to develop in clusters, and additionally, they cluster around large cities. However, the lack of reliance of some CCIs on long supply chains or high-technology inputs may make them suitable candidates for investment in small cities and towns. Additionally, the link that small cities and towns have with rural and isolated areas makes them potential engines for driving growth, development, as well as employment creation for these areas, given their decline as a result of the transition from the traditional agricultural economy, to the knowledge economy. As CCIs have the propensity to drive government’s macroeconomic objectives such as efficiency, equity, economic growth and job creation, it is necessary to develop cultural policy that regards this. The tendency of CCIs to cluster and develop around large cities inevitably means that very little research into cultural policy directed towards regions without large cities and towns has been done. By the same token, very little research has also been conducted on how to craft cultural policy for such areas. In order then, for cultural policy for regions without large cities and towns to be developed, it is necessary to investigate, and provide, guidelines on, how to develop cultural policy for such regions. As a case study, the Sarah Baartman District Municipality (SBDM) in the Eastern Cape was chosen. The SBDM has no large cities and towns, but the District Municipality has identified the CCIs as a potential growth sector, and is in the process of developing a regional cultural policy. The area also includes Grahamstown, which not only hosts the National Arts Festival, which is the largest arts event of its type in Africa, but is also piloting the “Creative City” project in South Africa. An audit and mapping study was conducted on the CCIs in the SBDM; this was based on a national mapping study commissioned by the Department of Arts and Culture. Further internet searches, as well as consultations with the provincial and regional Department of Arts of Culture, coupled with snowball sampling, also aided in the identification of CCIs, and consequently, the “creative hotspots” within the SBDM. Two random samples of stakeholders were chosen; the CCI owners and practitioners, as well as key stakeholders such as government officials, and interviews conducted with both groups, in order to get a first-hand perspective on the operations, activities, challenges, and opportunities that are faced by the CCIs. The study found that there were at least 441 CCIs in the SBDM, with two local municipalities (Dr. Beyers Naude and Makana) hosting the largest share of these (145 and 113 CCIs in each local municipality respectively), which indicates some support for the ‘clustering’ theory. It was also found that the local municipalities that had the largest number of CCIs also experienced better socio-economic welfare. Furthermore, based on the UNESCO Framework for Cultural Statistics (FCS) domains, the Visual Arts and Crafts; Information, Books and Press; and, Cultural Heritage domains were the largest domains represented in the SBDM. It was concluded that cultural policy that is developed, ought to take advantage of, and build on, these existing clusters, as well as the domains that are most prevalent in the region. To demonstrate the impact of cultural festivals on growth and development, a socio-economic impact study was undertaken at the 2016 National Arts Festival (NAF) in Grahamstown. Face to interviews, as well as self-completion questionnaires were used, with respondents at different venues, attending a variety of shows, and across a range of demographics, being interviewed, in order to get a representative sample of Festival attendees. It was found that the economic impact of the 2016 NAF on the city of Grahamstown was R94.4 million. Over and above the economic value of the NAF, it was also found that there were nonmarket benefits (social and intrinsic values) of the NAF, that included audience development, education of the arts and culture, social cohesion, and community development. The inability to directly track and measure social and intrinsic values proved to be a challenge. The study concluded that in order for successful cultural policy to be developed in regions without large cities and towns, it is first necessary to carry out a study to identify what resources are present, and where they are. Locating resources enables cluster identification - as clusters encourage comparative and competitive advantage, it is worthwhile to invest in areas where there are clusters. Therefore, in the allocation of scarce public funds, cultural policy needs to guide investment in to areas where established clusters indicate existing comparative advantage. In terms of equity and transformation, it is also necessary to evaluate labour markets and ownership patterns when developing cultural policy. Beyond the analysis of physical and human resources, the study also found that a crucial step towards developing successful cultural policy is identification of opportunities and challenges faced by the practitioners themselves; the policy ought to capitalise on the opportunities, whilst attempting to correct the challenges faced. Also of importance is aligning the proposed policy and its objectives with regional, provincial and national aims and objectives. Finally, it is important to include a monitoring and evaluation tool that will evaluate the performance of the policy against its stated aims and objectives.
- Full Text:
- Date Issued: 2018
Formulation development, manufacture and evaluation of a lamivudine-zidovudine nano co-crystal thermo-responsive suspension
- Authors: Witika, Bwalya Angel
- Date: 2020
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/140546 , vital:37897 , http://dx.doi.org/10.21504/10962/140546
- Description: Expected release date-April 2021
- Full Text:
- Date Issued: 2020
- Authors: Witika, Bwalya Angel
- Date: 2020
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/140546 , vital:37897 , http://dx.doi.org/10.21504/10962/140546
- Description: Expected release date-April 2021
- Full Text:
- Date Issued: 2020
"Us" and "them": disagreement over the meanings of terms, ambiguity, contestability and strategy in the Zimbabwean House of Assembly
- Hasler, Arthur Richard Patrick
- Authors: Hasler, Arthur Richard Patrick
- Date: 1989
- Subjects: Politicians -- Zimbabwe -- Language , Zimbabwe -- Politics and government -- 1980- |xLanguage
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2083 , http://hdl.handle.net/10962/d1001600
- Description: This is a study of how certain value loaded political terms are used in Zimbabwean Parliamentary debate. Before 1980 it is argued that aspects of lexical choice and an individual's sociopolitical position were extremely closely related, especially in the case of "white Rhodesians". There was also a marked lack of ambiguity in the use of value loaded terms at this time. In contemporary Zimbabwean House of Assembly, however, terms which became popularized when the new government came to power in 1980 are used with considerable ambiguity and contestability in order to further specific strategies. Though correlations between the choice of lexical units and individuals' positions in the social structure have been identified as "sociolinguistic variables" (Downes 1984, 75), it is argued that an analysis of this type of correlation should lead us to an analysis of how these lexical units or "terms" are used by individual speakers in a micro-political process. I hypothesize that the ambiguity and contestability which encompass certain key terms used in the Zimbabwean House contribute to their being used as strategies to achieve individual or party goals. I show that the terms are manipulated by individuals in various contexts, and that the normative connotations of terms, that is what the terms "ought" to mean, is not consistent with the ways in which they are used. This, in turn, has an effect on how people think the terms should be used. This process of language change exposes the interface between language usage and social life. Though not reducible to a single "correct" interpretation, it does provide rich material for the analysis of culture.
- Full Text:
- Date Issued: 1989
- Authors: Hasler, Arthur Richard Patrick
- Date: 1989
- Subjects: Politicians -- Zimbabwe -- Language , Zimbabwe -- Politics and government -- 1980- |xLanguage
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2083 , http://hdl.handle.net/10962/d1001600
- Description: This is a study of how certain value loaded political terms are used in Zimbabwean Parliamentary debate. Before 1980 it is argued that aspects of lexical choice and an individual's sociopolitical position were extremely closely related, especially in the case of "white Rhodesians". There was also a marked lack of ambiguity in the use of value loaded terms at this time. In contemporary Zimbabwean House of Assembly, however, terms which became popularized when the new government came to power in 1980 are used with considerable ambiguity and contestability in order to further specific strategies. Though correlations between the choice of lexical units and individuals' positions in the social structure have been identified as "sociolinguistic variables" (Downes 1984, 75), it is argued that an analysis of this type of correlation should lead us to an analysis of how these lexical units or "terms" are used by individual speakers in a micro-political process. I hypothesize that the ambiguity and contestability which encompass certain key terms used in the Zimbabwean House contribute to their being used as strategies to achieve individual or party goals. I show that the terms are manipulated by individuals in various contexts, and that the normative connotations of terms, that is what the terms "ought" to mean, is not consistent with the ways in which they are used. This, in turn, has an effect on how people think the terms should be used. This process of language change exposes the interface between language usage and social life. Though not reducible to a single "correct" interpretation, it does provide rich material for the analysis of culture.
- Full Text:
- Date Issued: 1989
Oor die kortkuns van John Miles
- Authors: De Beer, Marésa
- Date: 1988
- Subjects: Miles, John, 1938- -- Criticism and interpretation
- Language: Afrikaans
- Type: text , Thesis , Masters , MA
- Identifier: vital:3569 , http://hdl.handle.net/10962/d1002092
- Description: This thesis involves intensive analyses of some of the short-short stories in John Miles's Liefs nie op straat nie, in order to reveal the narrative strategies employed in each. In other words, it is geared to "the rules that govern ... textual actualization and, consequently, those rules that govern the way literary discourse functions as communication" (Riffaterre 1983: 158). Subsequently, attention is given to the interrelationship among the texts, the way in which they act upon one another and interact with the title of the volume, in order to establish the function of such relations. The following texts are analysed in consecutive chapters: "Lucy", "Lappies, kan jy my hoor, Lappies?", "Voorgevoel", "Dom Nakkie, my Dom Nakkie" and "Wie het nog Dom Nakkie gesien?", "Hy staan by die deur en hy klop", "Gustav gaan speel", and "Liefs nie op straat nie". In a concluding chapter the implications of the title are discussed with reference to all the texts in the volume, including those not analysed individually. It is concluded that, on the one hand, the expectations raised by the title are ironicized because the title is never "completed" explicitly, and because that which, by implication, should not be seen in public ("op straat"), is specifically situated in the street and scrutinized in close-up. But on the other hand the title also evokes a peculiar mentality present in all the texts, either in the narrators, or in the characters, or in both. The discussion of "Lucy" is focussed mainly on the contrast and interaction between the world of the child and that of the adult and on the way in which this interaction is actualized within the text through the contrast in the experience of time, the use of "mémoire involontaire", "durée" and the contrasts between (and overlapping of) narrative perspective and focalization. In respect of "Lappies, kan jy my hoor, Lappies?" special attention is paid to similarities and contrasts between this text and the traditional suspense story, notably the way in which conventional techniques are employed to create suspense, as well as to generate an entire subtext which eventually "relocates" the text on the niveau of the murderer's psychological dilemma. In discussing "Voorgevoel" emphasis is not placed primarily on what is conveyed by the narrator, but on the way in which his intentions are subverted both by the window pane through which he is looking and by the narration as such. In this way he is foregrounded and revealed as narrator, just as the text is foregrounded and revealed as literature, with the emphasis, in both cases, not only on their defence mechanisms but also on their impotence. "Dom Nakkie, my Dom Nakkie" and "Wie het nog Dom Nakkie gesien?" are grouped together in one chapter in order to illuminate the interaction between the two narratives in the first text, as well as the interaction between the two texts. Ultimately, they may be seen as three narratives juxtaposed through irony and relativism. The "triumph" of the "preferably not in public" mentality, both in the text and in society, is also illustrated by the interaction between the three narratives. In chapter, 5, in which "Hy staan by die deur en hy klop" is discussed, attention is focussed on the ironic function of the Biblical references, the contrast between Jan and the rest of society, and the way in which the "climax" is located within the Iserian "blank" in the text, so that the entire process of decoding is based on a filling in of that "blank" and its implications. "Gustav gaan speel" is based loosely on Barthes's lexia model, in order to determine the signifying process in the text, and also to demonstrate the way in which the text presupposes rereading. In the discussion of the title text it is revealed how the text is centered in the basic dichotomy between the narrator-as-writer and the journalist, and the way in which this polarity is relativized by the text as such. The text is demonstrated to be the credo of the volume as a whole as well as of the fiction of the Seventies in Afrikaans.
- Full Text:
- Date Issued: 1988
- Authors: De Beer, Marésa
- Date: 1988
- Subjects: Miles, John, 1938- -- Criticism and interpretation
- Language: Afrikaans
- Type: text , Thesis , Masters , MA
- Identifier: vital:3569 , http://hdl.handle.net/10962/d1002092
- Description: This thesis involves intensive analyses of some of the short-short stories in John Miles's Liefs nie op straat nie, in order to reveal the narrative strategies employed in each. In other words, it is geared to "the rules that govern ... textual actualization and, consequently, those rules that govern the way literary discourse functions as communication" (Riffaterre 1983: 158). Subsequently, attention is given to the interrelationship among the texts, the way in which they act upon one another and interact with the title of the volume, in order to establish the function of such relations. The following texts are analysed in consecutive chapters: "Lucy", "Lappies, kan jy my hoor, Lappies?", "Voorgevoel", "Dom Nakkie, my Dom Nakkie" and "Wie het nog Dom Nakkie gesien?", "Hy staan by die deur en hy klop", "Gustav gaan speel", and "Liefs nie op straat nie". In a concluding chapter the implications of the title are discussed with reference to all the texts in the volume, including those not analysed individually. It is concluded that, on the one hand, the expectations raised by the title are ironicized because the title is never "completed" explicitly, and because that which, by implication, should not be seen in public ("op straat"), is specifically situated in the street and scrutinized in close-up. But on the other hand the title also evokes a peculiar mentality present in all the texts, either in the narrators, or in the characters, or in both. The discussion of "Lucy" is focussed mainly on the contrast and interaction between the world of the child and that of the adult and on the way in which this interaction is actualized within the text through the contrast in the experience of time, the use of "mémoire involontaire", "durée" and the contrasts between (and overlapping of) narrative perspective and focalization. In respect of "Lappies, kan jy my hoor, Lappies?" special attention is paid to similarities and contrasts between this text and the traditional suspense story, notably the way in which conventional techniques are employed to create suspense, as well as to generate an entire subtext which eventually "relocates" the text on the niveau of the murderer's psychological dilemma. In discussing "Voorgevoel" emphasis is not placed primarily on what is conveyed by the narrator, but on the way in which his intentions are subverted both by the window pane through which he is looking and by the narration as such. In this way he is foregrounded and revealed as narrator, just as the text is foregrounded and revealed as literature, with the emphasis, in both cases, not only on their defence mechanisms but also on their impotence. "Dom Nakkie, my Dom Nakkie" and "Wie het nog Dom Nakkie gesien?" are grouped together in one chapter in order to illuminate the interaction between the two narratives in the first text, as well as the interaction between the two texts. Ultimately, they may be seen as three narratives juxtaposed through irony and relativism. The "triumph" of the "preferably not in public" mentality, both in the text and in society, is also illustrated by the interaction between the three narratives. In chapter, 5, in which "Hy staan by die deur en hy klop" is discussed, attention is focussed on the ironic function of the Biblical references, the contrast between Jan and the rest of society, and the way in which the "climax" is located within the Iserian "blank" in the text, so that the entire process of decoding is based on a filling in of that "blank" and its implications. "Gustav gaan speel" is based loosely on Barthes's lexia model, in order to determine the signifying process in the text, and also to demonstrate the way in which the text presupposes rereading. In the discussion of the title text it is revealed how the text is centered in the basic dichotomy between the narrator-as-writer and the journalist, and the way in which this polarity is relativized by the text as such. The text is demonstrated to be the credo of the volume as a whole as well as of the fiction of the Seventies in Afrikaans.
- Full Text:
- Date Issued: 1988
A gendered analysis of conditional cash based transfers: a case study of Puntland Technical Vocational Skills Training Programme, Somalia
- Authors: Chitombi, Rumbidzai
- Date: 2020
- Subjects: Puntland Technical Vocational Skills Training Programme , Transfer payments -- Somalia -- Case studies , Economic assistance, Domestic -- Somalia , Economic development -- Social aspects -- Somalia , Women -- Somalia -- Social conditions
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/167335 , vital:41469
- Description: As part of the worldwide development system, conditional cash transfer (CCT) programmes have become an increasingly popular policy and development approach in seeking to address poverty, especially in developing countries. Under the CCT programmes, beneficiaries are given assistance in the form of either cash or cash vouchers after fulfilling certain obligations of the development programme, such as attending training, enacting proper health care, or ensuring regular school attendance of children. The programmes have been described as a ‘double-edged sword’ since they aim to address poverty and, at the same time, reduce reliance on government largesse. In this regard, they are seen as potentially effective, and more empowering, alternatives to more traditional social assistance programmes whereby poor people receive welfare assistance in the form of ‘in kind’ and ‘unconditional’ assistance, receiving this as either food or shelter commodities, and without having to meet any conditions in doing so. This ‘traditional’ way of assisting poor people has largely been criticised for creating a dependency syndrome amongst the beneficiaries. In certain cases, CCT programmes focus specifically on women, either in receiving the cash transfer or in meeting the conditions attached to the programme, or both. In this context, considerable debate exists in the scholarly literature about the effects of such CCT programmes on the situation and status of women, specifically in terms of possibly empowering women. While some scholars claim that these programmes enhance the human and financial assets of women, others argue that focusing specifically on women, and as care-givers within households, tends to reproduce gender-based inequalities and subordination. Since gender equality and female empowerment are now key issues in global development spheres, and at national levels, this thesis aims to contribute to literature on the effects of CCTs on gender and women’s empowerment. This is pursued by way of a gendered perspective on CCTs as a development methodology for empowering women with reference to Somalia, using the Puntland Technical Vocational Skills Training programme as a case study. This programme focused, in the main, on internally-displaced people in Somalia, with a particular emphasis on women in meeting the programme conditions (i.e. participating in a training programme) and in being the cash recipients. The study used both quantitative and qualitative approaches for data collection and analysis, focusing on sixty selected beneficiaries who participated in the Puntland Technical Vocational skills training programme in Somalia from 2013. The thesis examines the prevailing structures (including cultural dynamics and socio-economic factors) in Somalia which lead to women’s subordination, notably in the light of significant internal displacement because of war and conflict and the emergence of internally-displaced camps. On this basis, from a gendered perspective, there is a critical appraisal of the manner in which the Puntland CCT programme affected women’s subordinate status, including how it may have led to the restructuring of gendered relations at both household and community levels. In offering this appraisal with reference to the Puntland programme, the thesis argues that women’s subordination and, by extension, women’s empowerment, is multi-faceted, and that continuity and change along the dimensions of subordination is often uneven and contradictory. Further, as also demonstrated in the Puntland case study, women’s subordination (as a social totality) is not a totalising system, such that women regularly make use of gaps in the system as opportunities to enhance their well-being without confronting the totality of the system.
- Full Text:
- Date Issued: 2020
- Authors: Chitombi, Rumbidzai
- Date: 2020
- Subjects: Puntland Technical Vocational Skills Training Programme , Transfer payments -- Somalia -- Case studies , Economic assistance, Domestic -- Somalia , Economic development -- Social aspects -- Somalia , Women -- Somalia -- Social conditions
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/167335 , vital:41469
- Description: As part of the worldwide development system, conditional cash transfer (CCT) programmes have become an increasingly popular policy and development approach in seeking to address poverty, especially in developing countries. Under the CCT programmes, beneficiaries are given assistance in the form of either cash or cash vouchers after fulfilling certain obligations of the development programme, such as attending training, enacting proper health care, or ensuring regular school attendance of children. The programmes have been described as a ‘double-edged sword’ since they aim to address poverty and, at the same time, reduce reliance on government largesse. In this regard, they are seen as potentially effective, and more empowering, alternatives to more traditional social assistance programmes whereby poor people receive welfare assistance in the form of ‘in kind’ and ‘unconditional’ assistance, receiving this as either food or shelter commodities, and without having to meet any conditions in doing so. This ‘traditional’ way of assisting poor people has largely been criticised for creating a dependency syndrome amongst the beneficiaries. In certain cases, CCT programmes focus specifically on women, either in receiving the cash transfer or in meeting the conditions attached to the programme, or both. In this context, considerable debate exists in the scholarly literature about the effects of such CCT programmes on the situation and status of women, specifically in terms of possibly empowering women. While some scholars claim that these programmes enhance the human and financial assets of women, others argue that focusing specifically on women, and as care-givers within households, tends to reproduce gender-based inequalities and subordination. Since gender equality and female empowerment are now key issues in global development spheres, and at national levels, this thesis aims to contribute to literature on the effects of CCTs on gender and women’s empowerment. This is pursued by way of a gendered perspective on CCTs as a development methodology for empowering women with reference to Somalia, using the Puntland Technical Vocational Skills Training programme as a case study. This programme focused, in the main, on internally-displaced people in Somalia, with a particular emphasis on women in meeting the programme conditions (i.e. participating in a training programme) and in being the cash recipients. The study used both quantitative and qualitative approaches for data collection and analysis, focusing on sixty selected beneficiaries who participated in the Puntland Technical Vocational skills training programme in Somalia from 2013. The thesis examines the prevailing structures (including cultural dynamics and socio-economic factors) in Somalia which lead to women’s subordination, notably in the light of significant internal displacement because of war and conflict and the emergence of internally-displaced camps. On this basis, from a gendered perspective, there is a critical appraisal of the manner in which the Puntland CCT programme affected women’s subordinate status, including how it may have led to the restructuring of gendered relations at both household and community levels. In offering this appraisal with reference to the Puntland programme, the thesis argues that women’s subordination and, by extension, women’s empowerment, is multi-faceted, and that continuity and change along the dimensions of subordination is often uneven and contradictory. Further, as also demonstrated in the Puntland case study, women’s subordination (as a social totality) is not a totalising system, such that women regularly make use of gaps in the system as opportunities to enhance their well-being without confronting the totality of the system.
- Full Text:
- Date Issued: 2020
Large scale spatio-temporal forcing of pelagic-coastal coupling: disentangling the effects of environmental change on intertidal invertebrate recruitment
- Authors: Muñiz, Carlota Fernández
- Date: 2019
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/75317 , vital:30400
- Description: Marine systems are driven by the relationships among organisms and environmental conditions. Anthropogenic-induced changes during the past decades have started to alter climatic drivers which have the potential to alter the physical, chemical and biological environment. In coastal systems, biogeography is influenced by the temporal variability in the conditions of the water mass. In addition, many marine benthic organisms develop in the water mass and rely on the conditions that link the pelagic and benthic systems for population maintenance. Such pelagic-coastal coupling indicates that changes in the trophic system during development can be transferred to the adult populations through changes in propagule supply. Thus, changes in environmental conditions can influence benthic populations directly (e.g. through larval advection) or indirectly, through their influence on the phytoplankton community (e.g. through the development of HABs). The South African coastline shows clear alongshore patterns of faunal biomass and species richness. On the south coast, strong longitudinal patterns of recruitment of intertidal organisms exist, with areas of particularly high recruitment. HABs of unprecedented spatio-temporal magnitude have recently developed along the south coast, including the areas where benthic recruitment is most intense. The present thesis used these blooms to study changes in intertidal recruitment directly or indirectly associated with their occurrence. Using a combination of remote sensing data to study the environmental conditions of the water mass in the innermost part of the Agulhas Bank, and estimates of mussel and barnacle recruitment rates to integrate the effects of conditions in the water mass during larval development, this thesis aimed to: (1) understand the conditions that triggered the development of an HAB of the dinoflagellate Lingulodinium polyedrum during summer of 2014, (2) determine the direct or indirect effects of that bloom on recruitment of intertidal organisms, and understand the factors that affect recruitment along the coast, (3) determine if the environmental factors during bloom development produced any carryover effects on recruit growth and mortality, and (4) determine the factors that drive changes in community biomass and composition along the south coast, the long-term trends in those factors, and possible changes experienced in recent years. Water column stability during spring, before the development of the red tide, followed by alternating periods of upwelling and relaxation during summer and autumn, seemed to promote the development and persistence of L. polyedrum. Recruitment of mussels and barnacles was estimated during the reproductive season of mussels in 2014, coinciding with the red tide, and during the following year. Alongshore patterns in recruitment were found, with higher mussel recruitment in the absence of the red tide and the opposite pattern in barnacles. Alongshore patterns in SST and chlorophyll matching those of recruitment were also found, with higher SSTs and lower chlorophyll during the red tide than the following year. Growth and mortality rates in barnacles did not differ between years during the first five months after settlement. This suggests that the factors which produced differences in recruitment between years did not produce carryover effects detectable at the temporal scales studied. Further analysis of 15 years of satellite-derived environmental data showed significant cooling trends potentially driven by a long-term seasonal acceleration of the Agulhas Current in autumn around two upwelling centres on the south coast, coinciding temporally with the reproductive period of mussels and barnacles, and spatially with the areas of highest recruitment. In addition, the comparison of SST and chl-a conditions during the first and the second half of the period of study showed that seasonality of both variables has changed in large areas over the shelf, with increasing importance of shorter-term variability, which would in turn decrease environmental predictability. Thus, the conditions observed during the present study, particularly during 2015, when upwelling seemed to be more intense, may presage the potential effects of identified long-term cooling trends at the upwelling centres. Although the general trend shows cooling around those areas, conditions can vary greatly among years, favouring different taxa. Changes in the Agulhas Current System are affected by changes in distant areas in the Indian Ocean basin. Such tele-connection is unlikely to be unique to this system and indicates the importance of understanding trends in major large scale climatic drivers and their regional effects in order to make predictions about coastal systems.
- Full Text:
- Date Issued: 2019
- Authors: Muñiz, Carlota Fernández
- Date: 2019
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/75317 , vital:30400
- Description: Marine systems are driven by the relationships among organisms and environmental conditions. Anthropogenic-induced changes during the past decades have started to alter climatic drivers which have the potential to alter the physical, chemical and biological environment. In coastal systems, biogeography is influenced by the temporal variability in the conditions of the water mass. In addition, many marine benthic organisms develop in the water mass and rely on the conditions that link the pelagic and benthic systems for population maintenance. Such pelagic-coastal coupling indicates that changes in the trophic system during development can be transferred to the adult populations through changes in propagule supply. Thus, changes in environmental conditions can influence benthic populations directly (e.g. through larval advection) or indirectly, through their influence on the phytoplankton community (e.g. through the development of HABs). The South African coastline shows clear alongshore patterns of faunal biomass and species richness. On the south coast, strong longitudinal patterns of recruitment of intertidal organisms exist, with areas of particularly high recruitment. HABs of unprecedented spatio-temporal magnitude have recently developed along the south coast, including the areas where benthic recruitment is most intense. The present thesis used these blooms to study changes in intertidal recruitment directly or indirectly associated with their occurrence. Using a combination of remote sensing data to study the environmental conditions of the water mass in the innermost part of the Agulhas Bank, and estimates of mussel and barnacle recruitment rates to integrate the effects of conditions in the water mass during larval development, this thesis aimed to: (1) understand the conditions that triggered the development of an HAB of the dinoflagellate Lingulodinium polyedrum during summer of 2014, (2) determine the direct or indirect effects of that bloom on recruitment of intertidal organisms, and understand the factors that affect recruitment along the coast, (3) determine if the environmental factors during bloom development produced any carryover effects on recruit growth and mortality, and (4) determine the factors that drive changes in community biomass and composition along the south coast, the long-term trends in those factors, and possible changes experienced in recent years. Water column stability during spring, before the development of the red tide, followed by alternating periods of upwelling and relaxation during summer and autumn, seemed to promote the development and persistence of L. polyedrum. Recruitment of mussels and barnacles was estimated during the reproductive season of mussels in 2014, coinciding with the red tide, and during the following year. Alongshore patterns in recruitment were found, with higher mussel recruitment in the absence of the red tide and the opposite pattern in barnacles. Alongshore patterns in SST and chlorophyll matching those of recruitment were also found, with higher SSTs and lower chlorophyll during the red tide than the following year. Growth and mortality rates in barnacles did not differ between years during the first five months after settlement. This suggests that the factors which produced differences in recruitment between years did not produce carryover effects detectable at the temporal scales studied. Further analysis of 15 years of satellite-derived environmental data showed significant cooling trends potentially driven by a long-term seasonal acceleration of the Agulhas Current in autumn around two upwelling centres on the south coast, coinciding temporally with the reproductive period of mussels and barnacles, and spatially with the areas of highest recruitment. In addition, the comparison of SST and chl-a conditions during the first and the second half of the period of study showed that seasonality of both variables has changed in large areas over the shelf, with increasing importance of shorter-term variability, which would in turn decrease environmental predictability. Thus, the conditions observed during the present study, particularly during 2015, when upwelling seemed to be more intense, may presage the potential effects of identified long-term cooling trends at the upwelling centres. Although the general trend shows cooling around those areas, conditions can vary greatly among years, favouring different taxa. Changes in the Agulhas Current System are affected by changes in distant areas in the Indian Ocean basin. Such tele-connection is unlikely to be unique to this system and indicates the importance of understanding trends in major large scale climatic drivers and their regional effects in order to make predictions about coastal systems.
- Full Text:
- Date Issued: 2019
An examination of Aristotelian modality
- Authors: Munshi, Salma
- Date: 1986
- Subjects: Aristotle , Modality (Theory of knowledge)
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2703 , http://hdl.handle.net/10962/d1001978
- Description: From introduction: A popular misconception regarding Aristotle's views on modality is that Aristotle adhered to the doctrine of no unrealized possibilities. According to this doctrine, all possibilities are realized in time; in other words, if it is possible that something could happen, then at some time it is the case that that happens. For example, if it is possible for Socrates to escape from prison, then there will be a time at which Socrates will actually escape from prison. On this view, the possible and the actual co-incide; whereas there is abundant evidence that Aristotle was careful to maintain a distinction between the possible and the actual.
- Full Text:
- Date Issued: 1986
- Authors: Munshi, Salma
- Date: 1986
- Subjects: Aristotle , Modality (Theory of knowledge)
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2703 , http://hdl.handle.net/10962/d1001978
- Description: From introduction: A popular misconception regarding Aristotle's views on modality is that Aristotle adhered to the doctrine of no unrealized possibilities. According to this doctrine, all possibilities are realized in time; in other words, if it is possible that something could happen, then at some time it is the case that that happens. For example, if it is possible for Socrates to escape from prison, then there will be a time at which Socrates will actually escape from prison. On this view, the possible and the actual co-incide; whereas there is abundant evidence that Aristotle was careful to maintain a distinction between the possible and the actual.
- Full Text:
- Date Issued: 1986
An investigation of the significance of learned helplessness on membership participation in co-operative movements
- Authors: Norman, Paul Deon
- Date: 1991
- Subjects: Learned helplessness , Psychology , Black people -- South Africa , Attributional Style Questionnaire , Partician Index , Co-operatives , Helplessness (Psychology) , Black people -- Psychology
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2895 , http://hdl.handle.net/10962/d1002059
- Description: In this study the psychological phenomenon of learned helplessness is investigated to determine its significance as a characteristic of members of progressive co-operatives within the South African context. Most of the members of these co-operatives are black South Africans. It is argued that because of the country's racial policy, many of the members have become accustomed to a passive response to events in their lives and this gives rise to their failure to utilise the freedom and opportunities of the co-operative structure. The researcher hypothesises that this passive response could be explained in terms of a high level of learned helplessness among co-operative members. Two hypotheses are investigated in this study: Hypothesis 1: Passive co-operative members will have higher levels of learned helplessness than active members. Hypothesis 2:The level of learned helplessness decreases as the length of co-operative members involvement increases. Data collection for this study was carried out by combining a personal interview and a standardised questionnaire (the Attributional Style Questionnaire). To distinguish between the passive and active members, a Participation Index was constructed. The ASQ was translated into Xhosa, adapted for the sample and two translators were employed to conduct the interviews in Xhosa. The sample consisted of 50 black South Africans, many with limited education and was drawn from six co-operatives in the Eastern Cape. No significant differences were found between the active and passive groups in terms of their levels of learned helplessness. Furthermore, the length of involvement in the co-operative had no effect on the level of learned helplessness. No support was found therefore for Hypothesis l and 2. A significant difference, however, was found between active and passive members and the number of months of involvement. This suggests that the length of involvement has an effect on how active members will be in the co-operative. The results of this study indicate that generally the sample does not suffer from learned helplessness. It is argued that Hypothesis 2 is not supported due to confounding variables. The study raises many doubts as to the reliability of the ASQ and the Participation Index used in the study.
- Full Text:
- Date Issued: 1991
- Authors: Norman, Paul Deon
- Date: 1991
- Subjects: Learned helplessness , Psychology , Black people -- South Africa , Attributional Style Questionnaire , Partician Index , Co-operatives , Helplessness (Psychology) , Black people -- Psychology
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2895 , http://hdl.handle.net/10962/d1002059
- Description: In this study the psychological phenomenon of learned helplessness is investigated to determine its significance as a characteristic of members of progressive co-operatives within the South African context. Most of the members of these co-operatives are black South Africans. It is argued that because of the country's racial policy, many of the members have become accustomed to a passive response to events in their lives and this gives rise to their failure to utilise the freedom and opportunities of the co-operative structure. The researcher hypothesises that this passive response could be explained in terms of a high level of learned helplessness among co-operative members. Two hypotheses are investigated in this study: Hypothesis 1: Passive co-operative members will have higher levels of learned helplessness than active members. Hypothesis 2:The level of learned helplessness decreases as the length of co-operative members involvement increases. Data collection for this study was carried out by combining a personal interview and a standardised questionnaire (the Attributional Style Questionnaire). To distinguish between the passive and active members, a Participation Index was constructed. The ASQ was translated into Xhosa, adapted for the sample and two translators were employed to conduct the interviews in Xhosa. The sample consisted of 50 black South Africans, many with limited education and was drawn from six co-operatives in the Eastern Cape. No significant differences were found between the active and passive groups in terms of their levels of learned helplessness. Furthermore, the length of involvement in the co-operative had no effect on the level of learned helplessness. No support was found therefore for Hypothesis l and 2. A significant difference, however, was found between active and passive members and the number of months of involvement. This suggests that the length of involvement has an effect on how active members will be in the co-operative. The results of this study indicate that generally the sample does not suffer from learned helplessness. It is argued that Hypothesis 2 is not supported due to confounding variables. The study raises many doubts as to the reliability of the ASQ and the Participation Index used in the study.
- Full Text:
- Date Issued: 1991
Developing a citizen technician based approach to suspended sediment monitoring in the Tsitsa River catchment, Eastern Cape, South Africa
- Authors: Bannatyne, Laura Joan
- Date: 2018
- Subjects: Sediments (Geology) -- Management , Sediments (Geology) -- South Africa -- Eastern Cape , Watersheds -- South Africa -- Eastern Cape , Suspended sediments -- South Africa -- Eastern Cape , Suspended sediments -- Monitoring -- Citizen participation , Tsitsa River
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62593 , vital:28211
- Description: Suspended sediment (SS) in channels is spatiotemporally heterogeneous and, over the long term, is known to be moved predominantly by flood flows with return periods of ~1 - 1.5 years. Flood flows in the Tsitsa catchment (Eastern Cape Province, South Africa) are unpredictable, and display a wide range of discharges. Direct, flood-focused SS sampling at sub-catchment scale was required to provide a SS baseline against which to monitor the impact on SS of catchment rehabilitation interventions, to determine the relative contributions of sub-catchments to SS loads and yields at the site of the proposed Ntabelanga Dam wall, and to verify modelled SS baselines, loads and yields. Approaches to SS sampling relying on researcher presence and/or installed equipment to adequately monitor SS through flood flows were precluded by cost, and the physical and socioeconomic conditions in the project area. A citizen technician (CT)-based flood-focused approach to direct SS sampling was developed and implemented. It was assessed in terms of its efficiency and effectiveness, the proficiency of the laboratory analysis methods, and the accuracy of the resulting SS data. A basic laboratory protocol for SSC analysis was developed, but is not the focus of this thesis. Using basic sampling equipment and smartphone-based reporting protocols, local residents at eleven points on the Tsitsa River and its major tributaries were employed as CTs. They were paid to take water samples during daylight hours at sub-daily timestep, with the emphasis on sampling through flood flows. The method was innovative in that it opted for manual sampling against a global trend towards instrumentation. Whilst the management of CTs formed a significant project component, the CTs benefitted directly through remuneration and work experience opportunities. The sampling method was evaluated at four sites from December 2015 - May 2016. The CTs were found to have efficiently and effectively sampled SS through a range of water levels, particularly in the main Tsitsa channel. An acceptable level of proficiency and accuracy was achieved, and many flood events were successfully defined by multiple data points. The method was chiefly limited by the inability of CTs to sample overnight rises and peaks occurring as a result of afternoon thunderstorms, particularly in small tributaries. The laboratory process was responsible for some losses in proficiency and accuracy. Improved laboratory quality control was therefore recommended. The CT-based approach can be adapted to other spatial and temporal scales in other areas, and to other environmental monitoring applications.
- Full Text:
- Date Issued: 2018
- Authors: Bannatyne, Laura Joan
- Date: 2018
- Subjects: Sediments (Geology) -- Management , Sediments (Geology) -- South Africa -- Eastern Cape , Watersheds -- South Africa -- Eastern Cape , Suspended sediments -- South Africa -- Eastern Cape , Suspended sediments -- Monitoring -- Citizen participation , Tsitsa River
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62593 , vital:28211
- Description: Suspended sediment (SS) in channels is spatiotemporally heterogeneous and, over the long term, is known to be moved predominantly by flood flows with return periods of ~1 - 1.5 years. Flood flows in the Tsitsa catchment (Eastern Cape Province, South Africa) are unpredictable, and display a wide range of discharges. Direct, flood-focused SS sampling at sub-catchment scale was required to provide a SS baseline against which to monitor the impact on SS of catchment rehabilitation interventions, to determine the relative contributions of sub-catchments to SS loads and yields at the site of the proposed Ntabelanga Dam wall, and to verify modelled SS baselines, loads and yields. Approaches to SS sampling relying on researcher presence and/or installed equipment to adequately monitor SS through flood flows were precluded by cost, and the physical and socioeconomic conditions in the project area. A citizen technician (CT)-based flood-focused approach to direct SS sampling was developed and implemented. It was assessed in terms of its efficiency and effectiveness, the proficiency of the laboratory analysis methods, and the accuracy of the resulting SS data. A basic laboratory protocol for SSC analysis was developed, but is not the focus of this thesis. Using basic sampling equipment and smartphone-based reporting protocols, local residents at eleven points on the Tsitsa River and its major tributaries were employed as CTs. They were paid to take water samples during daylight hours at sub-daily timestep, with the emphasis on sampling through flood flows. The method was innovative in that it opted for manual sampling against a global trend towards instrumentation. Whilst the management of CTs formed a significant project component, the CTs benefitted directly through remuneration and work experience opportunities. The sampling method was evaluated at four sites from December 2015 - May 2016. The CTs were found to have efficiently and effectively sampled SS through a range of water levels, particularly in the main Tsitsa channel. An acceptable level of proficiency and accuracy was achieved, and many flood events were successfully defined by multiple data points. The method was chiefly limited by the inability of CTs to sample overnight rises and peaks occurring as a result of afternoon thunderstorms, particularly in small tributaries. The laboratory process was responsible for some losses in proficiency and accuracy. Improved laboratory quality control was therefore recommended. The CT-based approach can be adapted to other spatial and temporal scales in other areas, and to other environmental monitoring applications.
- Full Text:
- Date Issued: 2018
Toward universal sustainability: strategies and guidelines
- Authors: Robertson, Struan Ross
- Date: 2019
- Subjects: Sustainability , Sustainable development , Economic development , Social planning
- Language: English
- Type: text , Thesis , Masters , MEcon
- Identifier: http://hdl.handle.net/10962/71591 , vital:29922
- Description: This research considers the notion of universal sustainability, which involves the three well-known pillars of sustainable development, namely, economic development, social development, and environmental sustainability. Critical to achieving this unity of purpose in the aligning of economic and social aspirations with the limits of the natural environment is the enhancing of human capability and the development of political institutions capable of representing the interests of all people by leveraging resources responsibly. Universal sustainability differs from the concept of sustainable development in that the emphasis is cast not on merely achieving economic development despite the challenges presented by social and environmental concerns, but on seeking to understand what a better society might look like that integrates outcomes in-line with these three factors. Universal sustainability is about re-thinking the purpose of material progress to realign this with the need for social cohesion and to reposition human values and expectations safely within ecological boundaries. In other words, strategies and guidelines that promote the realisation of universal sustainability would recommend a society that values economic and technological progress with equal measure to social development and environmental sustainability, as well as all the other factors that promote human wellbeing. Consequently, this research also considers the inter-linkages that are found between economic development (i.e. technological advancement) and social (i.e. normative progress) and societal (i.e. long-term institutional differentiation) development with respect to labour markets, the formation of skills, the scope of welfare regimes and hence, the trajectory of the social reproduction of society. The prospects of environmental sustainability, like that of societal development, are found to be influenced by the values that a society holds and the ability of economic and social factors to adapt in response to the environmental challenges that face societies in socially workable ways. This research concerns the great quest for meaning and purpose that humans have undertaken throughout history, and asks how human wellbeing – in its best, most expansive sense, can be improved and how societies can advance and prosper going forward while keeping the avenue of individual self-actualisation open as a possibility in the everyday lives of citizens? In achieving this end, this research looks at what economic development strategies suggest as tenable against these aspirations. Furthermore, this research looks at the experience of advanced democratic societies to better conceive of how material progress, social cohesion via education and welfare, and environmental sustainability can be attained. The selection of these countries ensures understanding for the kind of political arrangements that safeguard human wellbeing and give voice to freedom, material opportunities, and civic responsibilities. Critical to both these assessments is defining the mechanics that underlie the processes that achieve material and moral progress in human societies. The main goal of this research is to recommend strategies and guidelines for developing countries like South Africa that wish to develop and thrive. Therefore, this research presents an assessment framework for understanding both universal sustainability and how to achieve it. This research concludes that mindfulness about the natural environment and the services it supplies, as well as mindfulness about what drives economic development and what supports the conditions for human flourishing, are necessary for universal sustainability strategies and guidelines to work. Indeed, the ideologies that societies subscribe to and the values they hold are important 84 to creating the right conditions for economic tools to work to advance economic development, material improvement, socio-environmental justice, and ultimately for achieving universal sustainability. But central to both economic and environmental futures is an understanding that at the heart of the matter is a concern for apprehending what drives human behaviour and aspiration, and what creates social cohesion.
- Full Text:
- Date Issued: 2019
- Authors: Robertson, Struan Ross
- Date: 2019
- Subjects: Sustainability , Sustainable development , Economic development , Social planning
- Language: English
- Type: text , Thesis , Masters , MEcon
- Identifier: http://hdl.handle.net/10962/71591 , vital:29922
- Description: This research considers the notion of universal sustainability, which involves the three well-known pillars of sustainable development, namely, economic development, social development, and environmental sustainability. Critical to achieving this unity of purpose in the aligning of economic and social aspirations with the limits of the natural environment is the enhancing of human capability and the development of political institutions capable of representing the interests of all people by leveraging resources responsibly. Universal sustainability differs from the concept of sustainable development in that the emphasis is cast not on merely achieving economic development despite the challenges presented by social and environmental concerns, but on seeking to understand what a better society might look like that integrates outcomes in-line with these three factors. Universal sustainability is about re-thinking the purpose of material progress to realign this with the need for social cohesion and to reposition human values and expectations safely within ecological boundaries. In other words, strategies and guidelines that promote the realisation of universal sustainability would recommend a society that values economic and technological progress with equal measure to social development and environmental sustainability, as well as all the other factors that promote human wellbeing. Consequently, this research also considers the inter-linkages that are found between economic development (i.e. technological advancement) and social (i.e. normative progress) and societal (i.e. long-term institutional differentiation) development with respect to labour markets, the formation of skills, the scope of welfare regimes and hence, the trajectory of the social reproduction of society. The prospects of environmental sustainability, like that of societal development, are found to be influenced by the values that a society holds and the ability of economic and social factors to adapt in response to the environmental challenges that face societies in socially workable ways. This research concerns the great quest for meaning and purpose that humans have undertaken throughout history, and asks how human wellbeing – in its best, most expansive sense, can be improved and how societies can advance and prosper going forward while keeping the avenue of individual self-actualisation open as a possibility in the everyday lives of citizens? In achieving this end, this research looks at what economic development strategies suggest as tenable against these aspirations. Furthermore, this research looks at the experience of advanced democratic societies to better conceive of how material progress, social cohesion via education and welfare, and environmental sustainability can be attained. The selection of these countries ensures understanding for the kind of political arrangements that safeguard human wellbeing and give voice to freedom, material opportunities, and civic responsibilities. Critical to both these assessments is defining the mechanics that underlie the processes that achieve material and moral progress in human societies. The main goal of this research is to recommend strategies and guidelines for developing countries like South Africa that wish to develop and thrive. Therefore, this research presents an assessment framework for understanding both universal sustainability and how to achieve it. This research concludes that mindfulness about the natural environment and the services it supplies, as well as mindfulness about what drives economic development and what supports the conditions for human flourishing, are necessary for universal sustainability strategies and guidelines to work. Indeed, the ideologies that societies subscribe to and the values they hold are important 84 to creating the right conditions for economic tools to work to advance economic development, material improvement, socio-environmental justice, and ultimately for achieving universal sustainability. But central to both economic and environmental futures is an understanding that at the heart of the matter is a concern for apprehending what drives human behaviour and aspiration, and what creates social cohesion.
- Full Text:
- Date Issued: 2019
Population genomics analysis of yellowfin tuna Thunnus albacares off South Africa reveals need for a shifted management boundary
- Authors: Mullins, Rachel Brenna
- Date: 2017
- Subjects: Yellowfin tuna fisheries -- South Africa -- Western Cape , Genomics , Tuna fisheries -- South Africa , Fishery management -- South Africa
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/57819 , vital:26992
- Description: Yellowfin tuna Thunnus albacares is a commercially and economically important fisheries species, which comprises the second largest component of South Africa’s catch of tuna and tuna-like species. Catches of the species off South Africa are treated as two discrete stocks by the two tuna Regional Fisheries Management Organisations (tRFMOs) under whose jurisdictions they fall. Individuals caught off the Western Cape, west of the boundary between the tRFMOs at 20°E, are included in assessment and management of the Atlantic Ocean yellowfin tuna stock by the International Commission for the Conservation of Atlantic Tunas (ICCAT), and those caught east of this boundary are assessed and managed as part of the Indian Ocean stock by the Indian Ocean Tuna Commission (IOTC). The boundary between these stocks is based on the confluence of the two oceans in this region and does not incorporate the population structure of species. For sustainable exploitation of fisheries resources, it is important that the definition of management stocks reflects species’ biological population structure; the fine-scale stock structure of yellowfin tuna off South Africa is therefore a research priority which this study aimed to address by means of population genomics analyses. Yellowfin tuna exhibit shallow genetic differentiation over wide geographic areas, and as such traditional population genetic approaches have limited power in resolving fishery significant population structure in the species. Herein, a population genomic approach was employed, specifically, genome-wide analysis of single nucleotide polymorphisms (SNPs) discovered using a next-generation DNA sequencing approach, to confer (i) increased statistical power to detect neutral structuring reflecting population connectivity patterns and (ii) signatures of local adaptation. The mitochondrial Control Region (mtDNA CR) was also sequenced to compare the resolving power of different approaches and to permit coalescent based analyses of the species evolutionary history in the region. Neutral SNP loci revealed significant structure within the dataset (Fst=0.0043; P<0.0001); partitioning of this differentiation within the dataset indicated significant differentiation between yellowfin tuna from the Western Cape and the Gulf of Guinea in the eastern Atlantic Ocean, with no significant differentiation between individuals from the Western Cape and Western Indian Ocean regions. This indicates two population units wherein there is a separation of the Gulf of Guinea from the remaining samples (Indian Ocean including Western Cape) that are largely derived from a single genetic population. This pattern was also supported by assignment tests. Positive outlier SNPs, exhibiting signatures of diversifying selection, suggest that individuals from these regions may be locally adapted, as well as demographically isolated. The mtDNA CR did not reveal any significant genetic structure among samples (Fst=0.0030; P=0.309), demonstrating the increased resolving power provided by population genomics approaches, but revealed signatures of historical demographic fluctuations associated with glacial cycles. Based on the findings of this study, it is suggested that yellowfin tuna caught off the Western Cape of South Africa are migrants from the Indian Ocean population, exhibiting significant genetic differentiation from the Atlantic Ocean Gulf of Guinea individuals, and should thus be included in the assessment and management of the Indian Ocean stock. It is therefore recommended that the boundary between the Atlantic and Indian Ocean yellowfin tuna stocks, under the mandates of ICCAT and the IOTC respectively, should be shifted to approximately 13.35°E to include all individuals caught in South African waters in the Indian Ocean stock.
- Full Text:
- Date Issued: 2017
- Authors: Mullins, Rachel Brenna
- Date: 2017
- Subjects: Yellowfin tuna fisheries -- South Africa -- Western Cape , Genomics , Tuna fisheries -- South Africa , Fishery management -- South Africa
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/57819 , vital:26992
- Description: Yellowfin tuna Thunnus albacares is a commercially and economically important fisheries species, which comprises the second largest component of South Africa’s catch of tuna and tuna-like species. Catches of the species off South Africa are treated as two discrete stocks by the two tuna Regional Fisheries Management Organisations (tRFMOs) under whose jurisdictions they fall. Individuals caught off the Western Cape, west of the boundary between the tRFMOs at 20°E, are included in assessment and management of the Atlantic Ocean yellowfin tuna stock by the International Commission for the Conservation of Atlantic Tunas (ICCAT), and those caught east of this boundary are assessed and managed as part of the Indian Ocean stock by the Indian Ocean Tuna Commission (IOTC). The boundary between these stocks is based on the confluence of the two oceans in this region and does not incorporate the population structure of species. For sustainable exploitation of fisheries resources, it is important that the definition of management stocks reflects species’ biological population structure; the fine-scale stock structure of yellowfin tuna off South Africa is therefore a research priority which this study aimed to address by means of population genomics analyses. Yellowfin tuna exhibit shallow genetic differentiation over wide geographic areas, and as such traditional population genetic approaches have limited power in resolving fishery significant population structure in the species. Herein, a population genomic approach was employed, specifically, genome-wide analysis of single nucleotide polymorphisms (SNPs) discovered using a next-generation DNA sequencing approach, to confer (i) increased statistical power to detect neutral structuring reflecting population connectivity patterns and (ii) signatures of local adaptation. The mitochondrial Control Region (mtDNA CR) was also sequenced to compare the resolving power of different approaches and to permit coalescent based analyses of the species evolutionary history in the region. Neutral SNP loci revealed significant structure within the dataset (Fst=0.0043; P<0.0001); partitioning of this differentiation within the dataset indicated significant differentiation between yellowfin tuna from the Western Cape and the Gulf of Guinea in the eastern Atlantic Ocean, with no significant differentiation between individuals from the Western Cape and Western Indian Ocean regions. This indicates two population units wherein there is a separation of the Gulf of Guinea from the remaining samples (Indian Ocean including Western Cape) that are largely derived from a single genetic population. This pattern was also supported by assignment tests. Positive outlier SNPs, exhibiting signatures of diversifying selection, suggest that individuals from these regions may be locally adapted, as well as demographically isolated. The mtDNA CR did not reveal any significant genetic structure among samples (Fst=0.0030; P=0.309), demonstrating the increased resolving power provided by population genomics approaches, but revealed signatures of historical demographic fluctuations associated with glacial cycles. Based on the findings of this study, it is suggested that yellowfin tuna caught off the Western Cape of South Africa are migrants from the Indian Ocean population, exhibiting significant genetic differentiation from the Atlantic Ocean Gulf of Guinea individuals, and should thus be included in the assessment and management of the Indian Ocean stock. It is therefore recommended that the boundary between the Atlantic and Indian Ocean yellowfin tuna stocks, under the mandates of ICCAT and the IOTC respectively, should be shifted to approximately 13.35°E to include all individuals caught in South African waters in the Indian Ocean stock.
- Full Text:
- Date Issued: 2017
Strategy implementation at the Rand Water Board
- Authors: Leaver, Brian Jeffrey
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/62118 , vital:28129
- Description: Expected release date-April 2019
- Full Text:
- Date Issued: 2018
- Authors: Leaver, Brian Jeffrey
- Date: 2018
- Subjects: Uncatalogued
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/62118 , vital:28129
- Description: Expected release date-April 2019
- Full Text:
- Date Issued: 2018
Regional thickening as game-changing: examining transnational activities of gender and women-focused civil society actors for region-building in Southern Africa
- Authors: Nedziwe, Cecilia Lwiindi
- Date: 2019
- Subjects: International relations , Southern Africa Development Community , Regionalism -- Africa, Southern , Africa, Southern -- Foreign relations -- 1994- , Women in development -- Africa, Southern , Women -- Social conditions -- Africa, Southern , Women -- Political activity -- Africa, Southern , Women in public life -- Africa, Southern , Civil society -- Africa, Southern
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/95420 , vital:31154
- Description: This thesis argues that norms, in general, have proliferated in a neo-liberalising context since the 1990s, in particular norms on gender, and how they have changed to indicate new agency and influence, amounts to game change. Despite growing transnational activities, regionalisation and the increasing interface between state and non-state regionalism in a transnational context since the advent of liberalisation and democratisation, analyses in regional International Relations (IR) studies, so far, largely maintain linear logic. The increasing non-state processes, and their connection to state processes in norm creation, norm adaptation, norm diffusion and implementation around broad questions of security including in the area of gender, amount to regional thickening. Regional thickening revealed in terms of increasing regionalisation, regionalism, and region-ness whose effect is game-changing challenges mainstream linear approaches in regional IR studies. Game-changing here, refers to, processes promoting the development of norms mentioned above in the interest of contributing to improved security across a region. This study is focused on Southern Africa, defined here, as the Southern African Development Community (SADC) region. This study’s analytical approach is informed by alternatives to mainstream approaches, emphasising processes, rather than linearity inherent in regional IR studies. By privileging the actual game-changing processes, interactions, and agency around the norm development cycle, this study examines how regional thickening in a transnational context promotes game-changing activities, promoting the development of the norm cycle, seeking to have improved security. A mixed method approach involving gathering of information from multiple primary and secondary sources are used. The study found transnational activities and regionalisation of gender and women-focused civil society actors, game-changing. These civil society actors organised in two ways. First, by way of advocacy and in seeking representation within intergovernmental policymaking structures at a regional level. Second, by way of organising around transnational communities in a transnational context in the interest of addressing gendered insecurities at localised levels. Regional thickening as game-changing here pointed to a growing recognition and participation of civil society actors in intergovernmental policymaking spaces as having created a groundswell for game change at localised levels. This led to policy development, adaptation, diffusion, and implementation by both state and non-state actors contributing to norm changes, improved social policies, and to greater security. The actual changes emerging from these actors’ activities on the ground are in terms of unlearning patriarchal behaviours, opening up development for women, and increasing their living standards, education, health, and their freedom. In assessing the transnational environment on gendered insecurity in Southern Africa, this thesis developed an innovative framework of regional thickening as game-changing. This framework plots how game-changing developed, evolved, and its importance in addressing gendered insecurity. The thesis has proposed that game-changing transnational activities and regionalisation that change, and diffuse norms to break learnt behaviour, have helped disrupt rigid institutionalisation, and are aiding to bring non-linear discourses to the fore.
- Full Text:
- Date Issued: 2019
- Authors: Nedziwe, Cecilia Lwiindi
- Date: 2019
- Subjects: International relations , Southern Africa Development Community , Regionalism -- Africa, Southern , Africa, Southern -- Foreign relations -- 1994- , Women in development -- Africa, Southern , Women -- Social conditions -- Africa, Southern , Women -- Political activity -- Africa, Southern , Women in public life -- Africa, Southern , Civil society -- Africa, Southern
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/95420 , vital:31154
- Description: This thesis argues that norms, in general, have proliferated in a neo-liberalising context since the 1990s, in particular norms on gender, and how they have changed to indicate new agency and influence, amounts to game change. Despite growing transnational activities, regionalisation and the increasing interface between state and non-state regionalism in a transnational context since the advent of liberalisation and democratisation, analyses in regional International Relations (IR) studies, so far, largely maintain linear logic. The increasing non-state processes, and their connection to state processes in norm creation, norm adaptation, norm diffusion and implementation around broad questions of security including in the area of gender, amount to regional thickening. Regional thickening revealed in terms of increasing regionalisation, regionalism, and region-ness whose effect is game-changing challenges mainstream linear approaches in regional IR studies. Game-changing here, refers to, processes promoting the development of norms mentioned above in the interest of contributing to improved security across a region. This study is focused on Southern Africa, defined here, as the Southern African Development Community (SADC) region. This study’s analytical approach is informed by alternatives to mainstream approaches, emphasising processes, rather than linearity inherent in regional IR studies. By privileging the actual game-changing processes, interactions, and agency around the norm development cycle, this study examines how regional thickening in a transnational context promotes game-changing activities, promoting the development of the norm cycle, seeking to have improved security. A mixed method approach involving gathering of information from multiple primary and secondary sources are used. The study found transnational activities and regionalisation of gender and women-focused civil society actors, game-changing. These civil society actors organised in two ways. First, by way of advocacy and in seeking representation within intergovernmental policymaking structures at a regional level. Second, by way of organising around transnational communities in a transnational context in the interest of addressing gendered insecurities at localised levels. Regional thickening as game-changing here pointed to a growing recognition and participation of civil society actors in intergovernmental policymaking spaces as having created a groundswell for game change at localised levels. This led to policy development, adaptation, diffusion, and implementation by both state and non-state actors contributing to norm changes, improved social policies, and to greater security. The actual changes emerging from these actors’ activities on the ground are in terms of unlearning patriarchal behaviours, opening up development for women, and increasing their living standards, education, health, and their freedom. In assessing the transnational environment on gendered insecurity in Southern Africa, this thesis developed an innovative framework of regional thickening as game-changing. This framework plots how game-changing developed, evolved, and its importance in addressing gendered insecurity. The thesis has proposed that game-changing transnational activities and regionalisation that change, and diffuse norms to break learnt behaviour, have helped disrupt rigid institutionalisation, and are aiding to bring non-linear discourses to the fore.
- Full Text:
- Date Issued: 2019
A framework for malicious host fingerprinting using distributed network sensors
- Authors: Hunter, Samuel Oswald
- Date: 2018
- Subjects: Computer networks -- Security measures , Malware (Computer software) , Multisensor data fusion , Distributed Sensor Networks , Automated Reconnaissance Framework , Latency Based Multilateration
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/60653 , vital:27811
- Description: Numerous software agents exist and are responsible for increasing volumes of malicious traffic that is observed on the Internet today. From a technical perspective the existing techniques for monitoring malicious agents and traffic were not developed to allow for the interrogation of the source of malicious traffic. This interrogation or reconnaissance would be considered active analysis as opposed to existing, mostly passive analysis. Unlike passive analysis, the active techniques are time-sensitive and their results become increasingly inaccurate as time delta between observation and interrogation increases. In addition to this, some studies had shown that the geographic separation of hosts on the Internet have resulted in pockets of different malicious agents and traffic targeting victims. As such it would be important to perform any kind of data collection over various source and in distributed IP address space. The data gathering and exposure capabilities of sensors such as honeypots and network telescopes were extended through the development of near-realtime Distributed Sensor Network modules that allowed for the near-realtime analysis of malicious traffic from distributed, heterogeneous monitoring sensors. In order to utilise the data exposed by the near-realtime Distributed Sensor Network modules an Automated Reconnaissance Framework was created, this framework was tasked with active and passive information collection and analysis of data in near-realtime and was designed from an adapted Multi Sensor Data Fusion model. The hypothesis was made that if sufficiently different characteristics of a host could be identified; combined they could act as a unique fingerprint for that host, potentially allowing for the re-identification of that host, even if its IP address had changed. To this end the concept of Latency Based Multilateration was introduced, acting as an additional metric for remote host fingerprinting. The vast amount of information gathered by the AR-Framework required the development of visualisation tools which could illustrate this data in near-realtime and also provided various degrees of interaction to accommodate human interpretation of such data. Ultimately the data collected through the application of the near-realtime Distributed Sensor Network and AR-Framework provided a unique perspective of a malicious host demographic. Allowing for new correlations to be drawn between attributes such as common open ports and operating systems, location, and inferred intent of these malicious hosts. The result of which expands our current understanding of malicious hosts on the Internet and enables further research in the area.
- Full Text:
- Date Issued: 2018
- Authors: Hunter, Samuel Oswald
- Date: 2018
- Subjects: Computer networks -- Security measures , Malware (Computer software) , Multisensor data fusion , Distributed Sensor Networks , Automated Reconnaissance Framework , Latency Based Multilateration
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/60653 , vital:27811
- Description: Numerous software agents exist and are responsible for increasing volumes of malicious traffic that is observed on the Internet today. From a technical perspective the existing techniques for monitoring malicious agents and traffic were not developed to allow for the interrogation of the source of malicious traffic. This interrogation or reconnaissance would be considered active analysis as opposed to existing, mostly passive analysis. Unlike passive analysis, the active techniques are time-sensitive and their results become increasingly inaccurate as time delta between observation and interrogation increases. In addition to this, some studies had shown that the geographic separation of hosts on the Internet have resulted in pockets of different malicious agents and traffic targeting victims. As such it would be important to perform any kind of data collection over various source and in distributed IP address space. The data gathering and exposure capabilities of sensors such as honeypots and network telescopes were extended through the development of near-realtime Distributed Sensor Network modules that allowed for the near-realtime analysis of malicious traffic from distributed, heterogeneous monitoring sensors. In order to utilise the data exposed by the near-realtime Distributed Sensor Network modules an Automated Reconnaissance Framework was created, this framework was tasked with active and passive information collection and analysis of data in near-realtime and was designed from an adapted Multi Sensor Data Fusion model. The hypothesis was made that if sufficiently different characteristics of a host could be identified; combined they could act as a unique fingerprint for that host, potentially allowing for the re-identification of that host, even if its IP address had changed. To this end the concept of Latency Based Multilateration was introduced, acting as an additional metric for remote host fingerprinting. The vast amount of information gathered by the AR-Framework required the development of visualisation tools which could illustrate this data in near-realtime and also provided various degrees of interaction to accommodate human interpretation of such data. Ultimately the data collected through the application of the near-realtime Distributed Sensor Network and AR-Framework provided a unique perspective of a malicious host demographic. Allowing for new correlations to be drawn between attributes such as common open ports and operating systems, location, and inferred intent of these malicious hosts. The result of which expands our current understanding of malicious hosts on the Internet and enables further research in the area.
- Full Text:
- Date Issued: 2018
Primêre leerlinge se geskiedenispotentiaal: 'n empiriese ondersoek na senior primêre leerlinge en onderwysers se vermoë om indringende vrae oor 'n historiese gebeurtenis met begrip en insig te beantwoord
- Authors: Hattingh, Johannes Hendrik
- Date: 1989
- Subjects: History -- Study and teaching (Elementary)
- Language: Afrikaans
- Type: text , Thesis , Masters , MEd
- Identifier: vital:1362 , http://hdl.handle.net/10962/d1001428
- Description: The main aim of this research was to determine the potential of senior primary pupils and serving teachers to understand a text that is concerned with a historical event. A test was written by 136 white standard 3, 4 and 5 pupils from a Cape Province primary school, as well as 32 serving teachers from various other Cape Province primary schools. The test consisted of a text and questions based upon it. The testees had 60 minutes at their disposal to study the text and give written answers to the questions. The historical event explained in the text dealt with the Peasant Uprising that occurred in England in 1381. Eight open-ended questions were asked. The questions were graded according to difficulty and based on the model of Merrit to test the following levels of thought: knowledge, application, inference and evaluation. In the dissertation attention is paid to the following aspects: 1. Background for the research. 2. The most important theoretical aspects that play a role in the process of historical understanding. 3. A statistlcal analysis of the results obtained from the pupils and teachers, with attention to those factors that may have influenced the results e.g. verbal IQ, age, interest, etc. 4. The quality of the teachers' and pupils' answers as well as examples from their work to illustrate certain aspects. 5. The most important conclusions that can be drawn from the research. Based on their answers to the graded questions the pupils were grouped into different levels to ascertain whether a significant pattern would emerge for each standard. It became clear, however, that irrespective of age or verbal IQ the pupils could not consistently be grouped into a specific level or category. The most important conclusions of the research are the following: 1. The ability of senior primary pupils to cope with intellectually stimulating material are underestimated. 2. A variety of factors influenced the results of the pupils, but not one of the factors studied in this research was found to be of significant importance. 3. The average primary teacher do have the potential ability to cope with more difficult historical material than the present factual approach would suggest.
- Full Text:
- Date Issued: 1989
- Authors: Hattingh, Johannes Hendrik
- Date: 1989
- Subjects: History -- Study and teaching (Elementary)
- Language: Afrikaans
- Type: text , Thesis , Masters , MEd
- Identifier: vital:1362 , http://hdl.handle.net/10962/d1001428
- Description: The main aim of this research was to determine the potential of senior primary pupils and serving teachers to understand a text that is concerned with a historical event. A test was written by 136 white standard 3, 4 and 5 pupils from a Cape Province primary school, as well as 32 serving teachers from various other Cape Province primary schools. The test consisted of a text and questions based upon it. The testees had 60 minutes at their disposal to study the text and give written answers to the questions. The historical event explained in the text dealt with the Peasant Uprising that occurred in England in 1381. Eight open-ended questions were asked. The questions were graded according to difficulty and based on the model of Merrit to test the following levels of thought: knowledge, application, inference and evaluation. In the dissertation attention is paid to the following aspects: 1. Background for the research. 2. The most important theoretical aspects that play a role in the process of historical understanding. 3. A statistlcal analysis of the results obtained from the pupils and teachers, with attention to those factors that may have influenced the results e.g. verbal IQ, age, interest, etc. 4. The quality of the teachers' and pupils' answers as well as examples from their work to illustrate certain aspects. 5. The most important conclusions that can be drawn from the research. Based on their answers to the graded questions the pupils were grouped into different levels to ascertain whether a significant pattern would emerge for each standard. It became clear, however, that irrespective of age or verbal IQ the pupils could not consistently be grouped into a specific level or category. The most important conclusions of the research are the following: 1. The ability of senior primary pupils to cope with intellectually stimulating material are underestimated. 2. A variety of factors influenced the results of the pupils, but not one of the factors studied in this research was found to be of significant importance. 3. The average primary teacher do have the potential ability to cope with more difficult historical material than the present factual approach would suggest.
- Full Text:
- Date Issued: 1989
Development and validation of a health literacy measure for limited literacy public sector patients in South Africa
- Authors: Marimwe, Chipiwa
- Date: 2018
- Subjects: Health literacy -- South Africa , Patient education -- South Africa , Communication in medicine -- South Africa , Health literacy -- Social aspects -- South Africa , Poor -- Medical care -- South Africa , Analysis of variance , Multidimensional Screener of Functional Health Literacy (MSFHL)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62661 , vital:28227
- Description: The growing complexity of healthcare demands greater patient involvement and skills to navigate this complex system. It has therefore become increasingly important to identify individuals with inadequate health literacy, by using efficient, short and reliable measures for doing so. Most research on the development and validation of health literacy tests has been conducted in high-income countries, with very little reported from low-and middle-income countries (LMICs). Existing health literacy measures have come under scrutiny for their lack of cultural sensitivity, bias towards certain population groups and failure to acknowledge health literacy as a multidimensional concept. These measures usually have limited application in LMICs due to the significantly different structuring of healthcare systems, they overlook the extreme discrepancies in educational levels, and rely too heavily on the ability to read health information. No health literacy data for South Africa are available, and only a few health literacy-based research papers have been published in this country. The aim of the study was to develop and validate a health literacy measure that is contextually and culturally appropriate to measure health literacy in limited literacy public sector patients in South Africa. An Item Bank of 30 questions was developed with the input of a diverse expert consultant panel, and included skills-based and self-reported questions which ensured cultural, contextual and educational level appropriateness. The Information and Support for Health Actions Questionnaire (ISHA-Q) is a health literacy measure developed to assess health literacy for LMICs which includes 14 core scales. These were useful in ensuring coverage of a range of health literacy constructs within the Item Bank. The 30 questions were then allocated to one of three health literacy domains: Procedural knowledge, Factual knowledge and Access to healthcare, health services and social support. Ethical approval for the study was obtained. The questions were translated into isiXhosa and underwent pilot testing. Following pilot testing, 120 isiXhosa first-language speakers, at least 18 years old, who attended public sector facilities and had a maximum 12 years of education were recruited from a primary healthcare clinic in Grahamstown. An interpreter was trained and he participated in all interviews. A questionnaire was used to collect data on the 30-question Item Bank. The Multidimensional Screener of Functional Health Literacy (MSFHL) was used as the primary comparator.The second phase of the study involved the refinement of the 30 questions in the Item Bank, which involved a multi-stage process. Data were analysed statistically using t-test, correlations, chi-square and ANOVA tests at a 5% level of significance, in order to identify problematic questions. Item Response Theory was used to ascertain difficulty and discriminatory ability of the questions. Each question was further subjected to in-depth interrogation by a panel of healthcare professionals to ensure that questions were supported by the conceptual framework and the definitions of health literacy adopted for this study. The number of questions was reduced from 30 to 12, and formed the new Health Literacy Test - Limited Literacy (HELT-LL). To validate the HELT-LL, 210 patients with the same inclusion criteria as previously noted, were recruited from four primary healthcare clinics in the Eastern Cape Province. Individual interviews were conducted with the assistance of the interpreter to collect sociodemographic data as well as data from the HELT-LL, the primary comparator (MSFHL), and a secondary comparator which was a South African modified version of the Newest Vital Sign (NVS-SA). The HELT-LL was re-administered to 40 patients in a follow-up interview two weeks later. The HELT-LL categorised only 17.6% of the patients as having adequate health literacy, just over a third with inadequate health literacy, and the majority with marginal health literacy. Questions in the cognitively demanding Procedural knowledge domain were the most poorly answered, with a mean score of 48.6±24.9%. Patients had great difficulty performing the basic numeric tasks in this domain. The overall mean score for the HELT-LL was 52.8±18.4%, compared with the more cognitively demanding NVS-SA with a mean of 28.6±21.1%, and clearly illustrated the impact of the strategy to include in the HELT-LL a variety of questions with differing cognitive load. The MSFHL, which is based on demographic characteristics and perceived difficulties with reading and writing, had an overall mean score of 44.4±26.2%. Demographic characteristics including age, education and English literacy, were found to be good predictors of limited health literacy, with significant correlations being found between these variables and the mean HELT-LL score. An acceptable value for Cronbach’s alpha, excellent test-retest reliability and excellent concurrent validity show that the HELT-LL is a valid and reliable measure of health literacy in our target population. As there is a paucity of health literacy research emanating from developing countries, this study presents a significant contribution to literature. It is the first study to report the development and validation of a health literacy measure to address the dearth of available health literacy measures applicable for South Africa. If implemented for use in clinical settings and for research purposes, it could provide valuable South African health literacy data which could inform the development of interventions focusing on improving health literacy and health outcomes.
- Full Text:
- Date Issued: 2018
- Authors: Marimwe, Chipiwa
- Date: 2018
- Subjects: Health literacy -- South Africa , Patient education -- South Africa , Communication in medicine -- South Africa , Health literacy -- Social aspects -- South Africa , Poor -- Medical care -- South Africa , Analysis of variance , Multidimensional Screener of Functional Health Literacy (MSFHL)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62661 , vital:28227
- Description: The growing complexity of healthcare demands greater patient involvement and skills to navigate this complex system. It has therefore become increasingly important to identify individuals with inadequate health literacy, by using efficient, short and reliable measures for doing so. Most research on the development and validation of health literacy tests has been conducted in high-income countries, with very little reported from low-and middle-income countries (LMICs). Existing health literacy measures have come under scrutiny for their lack of cultural sensitivity, bias towards certain population groups and failure to acknowledge health literacy as a multidimensional concept. These measures usually have limited application in LMICs due to the significantly different structuring of healthcare systems, they overlook the extreme discrepancies in educational levels, and rely too heavily on the ability to read health information. No health literacy data for South Africa are available, and only a few health literacy-based research papers have been published in this country. The aim of the study was to develop and validate a health literacy measure that is contextually and culturally appropriate to measure health literacy in limited literacy public sector patients in South Africa. An Item Bank of 30 questions was developed with the input of a diverse expert consultant panel, and included skills-based and self-reported questions which ensured cultural, contextual and educational level appropriateness. The Information and Support for Health Actions Questionnaire (ISHA-Q) is a health literacy measure developed to assess health literacy for LMICs which includes 14 core scales. These were useful in ensuring coverage of a range of health literacy constructs within the Item Bank. The 30 questions were then allocated to one of three health literacy domains: Procedural knowledge, Factual knowledge and Access to healthcare, health services and social support. Ethical approval for the study was obtained. The questions were translated into isiXhosa and underwent pilot testing. Following pilot testing, 120 isiXhosa first-language speakers, at least 18 years old, who attended public sector facilities and had a maximum 12 years of education were recruited from a primary healthcare clinic in Grahamstown. An interpreter was trained and he participated in all interviews. A questionnaire was used to collect data on the 30-question Item Bank. The Multidimensional Screener of Functional Health Literacy (MSFHL) was used as the primary comparator.The second phase of the study involved the refinement of the 30 questions in the Item Bank, which involved a multi-stage process. Data were analysed statistically using t-test, correlations, chi-square and ANOVA tests at a 5% level of significance, in order to identify problematic questions. Item Response Theory was used to ascertain difficulty and discriminatory ability of the questions. Each question was further subjected to in-depth interrogation by a panel of healthcare professionals to ensure that questions were supported by the conceptual framework and the definitions of health literacy adopted for this study. The number of questions was reduced from 30 to 12, and formed the new Health Literacy Test - Limited Literacy (HELT-LL). To validate the HELT-LL, 210 patients with the same inclusion criteria as previously noted, were recruited from four primary healthcare clinics in the Eastern Cape Province. Individual interviews were conducted with the assistance of the interpreter to collect sociodemographic data as well as data from the HELT-LL, the primary comparator (MSFHL), and a secondary comparator which was a South African modified version of the Newest Vital Sign (NVS-SA). The HELT-LL was re-administered to 40 patients in a follow-up interview two weeks later. The HELT-LL categorised only 17.6% of the patients as having adequate health literacy, just over a third with inadequate health literacy, and the majority with marginal health literacy. Questions in the cognitively demanding Procedural knowledge domain were the most poorly answered, with a mean score of 48.6±24.9%. Patients had great difficulty performing the basic numeric tasks in this domain. The overall mean score for the HELT-LL was 52.8±18.4%, compared with the more cognitively demanding NVS-SA with a mean of 28.6±21.1%, and clearly illustrated the impact of the strategy to include in the HELT-LL a variety of questions with differing cognitive load. The MSFHL, which is based on demographic characteristics and perceived difficulties with reading and writing, had an overall mean score of 44.4±26.2%. Demographic characteristics including age, education and English literacy, were found to be good predictors of limited health literacy, with significant correlations being found between these variables and the mean HELT-LL score. An acceptable value for Cronbach’s alpha, excellent test-retest reliability and excellent concurrent validity show that the HELT-LL is a valid and reliable measure of health literacy in our target population. As there is a paucity of health literacy research emanating from developing countries, this study presents a significant contribution to literature. It is the first study to report the development and validation of a health literacy measure to address the dearth of available health literacy measures applicable for South Africa. If implemented for use in clinical settings and for research purposes, it could provide valuable South African health literacy data which could inform the development of interventions focusing on improving health literacy and health outcomes.
- Full Text:
- Date Issued: 2018
The family in Shakespeare's plays: a study of South African revisions
- Authors: Hjul, Lauren Martha
- Date: 2013
- Subjects: Parents , Parental bonds , Family , Shakespeare, William, 1564-1616 -- In literature -- Research , Coetzee, J M, 1940-. Disgrace , Gordimer, Nadine. My son's story , Peteni, R L, 1915-. Hill of fools , English drama -- 17th century -- History and criticism , Families in literature , English literature -- History and criticism
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2181 , http://hdl.handle.net/10962/d1001832
- Description: This thesis provides a detailed consideration of the family in Shakespeare’s canon and the engagement therewith in three South African novels: Hill of Fools (1976) by R. L. Peteni, My Son’s Story (1990) by Nadine Gordimer, and Disgrace (1999) by J. M. Coetzee. The study is divided into an introduction, three chapters each addressing one of the South African novels and its relationship with a Shakespeare text or texts, and a conclusion. The introductory chapter provides an analysis of the two strands of criticism in which the thesis is situated – studies of the family in Shakespeare and studies of appropriations of Shakespeare – and discusses the ways in which these two strands may be combined through a detailed discussion of the presence of power dynamics in the relationship between parent and child in all of the texts considered. The three chapters each contextualise the South African text and provide detailed discussions of the family dynamics within the relevant texts, with particular reference to questions of authority and autonomy. The focus in each chapter is determined by the nature of the intertextual relationship between the South African novel and the Shakespearean text being discussed. Thus, the first chapter, “The Dissolution of Familial Structures in Hill of Fools” considers power dynamics in the family as an inherent part of the Romeo and Juliet genre, of which William Shakespeare’s Romeo and Juliet is but a part. Similarly, the impact of a socio-political identity, and the secrecy it necessitates, is the focus of the second chapter, “Fathers, Sons and Legacy in My Son’s Story” as is the role of Shakespeare and literature within South Africa. These concerns are connected to the novel’s use of Shakespeare’s Sonnets, King Lear, and Hamlet. In the third chapter, “Reclaiming Agency through the Daughter in Disgrace and The Tempest”, I expand on Laurence Wright’s argument that Disgrace is an engagement with The Tempest and consider ways in which the altered power dynamic between father and daughter results in the reconciliation of the father figure with society. The thesis thus addresses the tension between parental bonds and parental bondage
- Full Text:
- Date Issued: 2013
- Authors: Hjul, Lauren Martha
- Date: 2013
- Subjects: Parents , Parental bonds , Family , Shakespeare, William, 1564-1616 -- In literature -- Research , Coetzee, J M, 1940-. Disgrace , Gordimer, Nadine. My son's story , Peteni, R L, 1915-. Hill of fools , English drama -- 17th century -- History and criticism , Families in literature , English literature -- History and criticism
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2181 , http://hdl.handle.net/10962/d1001832
- Description: This thesis provides a detailed consideration of the family in Shakespeare’s canon and the engagement therewith in three South African novels: Hill of Fools (1976) by R. L. Peteni, My Son’s Story (1990) by Nadine Gordimer, and Disgrace (1999) by J. M. Coetzee. The study is divided into an introduction, three chapters each addressing one of the South African novels and its relationship with a Shakespeare text or texts, and a conclusion. The introductory chapter provides an analysis of the two strands of criticism in which the thesis is situated – studies of the family in Shakespeare and studies of appropriations of Shakespeare – and discusses the ways in which these two strands may be combined through a detailed discussion of the presence of power dynamics in the relationship between parent and child in all of the texts considered. The three chapters each contextualise the South African text and provide detailed discussions of the family dynamics within the relevant texts, with particular reference to questions of authority and autonomy. The focus in each chapter is determined by the nature of the intertextual relationship between the South African novel and the Shakespearean text being discussed. Thus, the first chapter, “The Dissolution of Familial Structures in Hill of Fools” considers power dynamics in the family as an inherent part of the Romeo and Juliet genre, of which William Shakespeare’s Romeo and Juliet is but a part. Similarly, the impact of a socio-political identity, and the secrecy it necessitates, is the focus of the second chapter, “Fathers, Sons and Legacy in My Son’s Story” as is the role of Shakespeare and literature within South Africa. These concerns are connected to the novel’s use of Shakespeare’s Sonnets, King Lear, and Hamlet. In the third chapter, “Reclaiming Agency through the Daughter in Disgrace and The Tempest”, I expand on Laurence Wright’s argument that Disgrace is an engagement with The Tempest and consider ways in which the altered power dynamic between father and daughter results in the reconciliation of the father figure with society. The thesis thus addresses the tension between parental bonds and parental bondage
- Full Text:
- Date Issued: 2013