Nudus amor formam non amat artificem : representations of gender in elegiac discourse
- Authors: Evans, Philippa A
- Date: 2015
- Subjects: Elegiac poetry , Gender identity in literature , Foucault, Michel, 1926-1984 , Butler, Judith, 1956- , Benjamin, Jessica , Mulvey, Laura , Tibullus , Propertius, Sextus , Sulpicia, active 1st century B.C. , Ovid, 43 B.C. - 17 or 18 A.D. Metamorphoses. Liber 10
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3654 , http://hdl.handle.net/10962/d1017895
- Description: This thesis explores the representation of gender, desire, and identity in elegiac discourse. It does so through the lens of post‐structural and psychoanalytic theory, referring to the works of Michel Foucault, Judith Butler, Jessica Benjamin, and Laura Mulvey in their analyses of power, gender performativity, and subjectivity. Within this thesis, these concepts are applied primarily to the works of Tibullus, Propertius, and Sulpicia, ultimately demonstrating that the three love elegists seek, in their poetry, to construct subversive discourses which destabilise the categories by which gender and identity were determined in Augustan Rome. This discussion is supplemented by the investigation of Ovid’s use of elegiac discourse in Book 10 of his Metamorphoses, and the way in which it both comments upon Augustan love elegy and demonstrates a number of parallels with its thematic content. This thesis focuses especially on the representation of power relations within elegiac discourse, the various levels on which such relations operate and, finally, the possibilities for the contestation of and resistance to power, in addition to the motivations that might lie behind the poet‐lover’s frequent attraction and submission to it.
- Full Text:
- Date Issued: 2015
- Authors: Evans, Philippa A
- Date: 2015
- Subjects: Elegiac poetry , Gender identity in literature , Foucault, Michel, 1926-1984 , Butler, Judith, 1956- , Benjamin, Jessica , Mulvey, Laura , Tibullus , Propertius, Sextus , Sulpicia, active 1st century B.C. , Ovid, 43 B.C. - 17 or 18 A.D. Metamorphoses. Liber 10
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3654 , http://hdl.handle.net/10962/d1017895
- Description: This thesis explores the representation of gender, desire, and identity in elegiac discourse. It does so through the lens of post‐structural and psychoanalytic theory, referring to the works of Michel Foucault, Judith Butler, Jessica Benjamin, and Laura Mulvey in their analyses of power, gender performativity, and subjectivity. Within this thesis, these concepts are applied primarily to the works of Tibullus, Propertius, and Sulpicia, ultimately demonstrating that the three love elegists seek, in their poetry, to construct subversive discourses which destabilise the categories by which gender and identity were determined in Augustan Rome. This discussion is supplemented by the investigation of Ovid’s use of elegiac discourse in Book 10 of his Metamorphoses, and the way in which it both comments upon Augustan love elegy and demonstrates a number of parallels with its thematic content. This thesis focuses especially on the representation of power relations within elegiac discourse, the various levels on which such relations operate and, finally, the possibilities for the contestation of and resistance to power, in addition to the motivations that might lie behind the poet‐lover’s frequent attraction and submission to it.
- Full Text:
- Date Issued: 2015
Factors in the success or failure of selected urban agricultural projects in Nelson Mandela Bay
- Authors: Fadana, Yanga Yolanda
- Date: 2015
- Subjects: Agricultural development projects -- South Africa -- Eastern Cape -- Nelson Mandela Bay Municipality , Urban agriculture -- South Africa -- Eastern Cape -- Nelson Mandela Bay Municipality -- Economic aspects , Land use, Urban -- South Africa -- Eastern Cape -- Nelson Mandela Bay Municipality
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/8306 , vital:26321
- Description: Sustainable agriculture is explained by Reddy (1995: 22) as the ability for agricultural projects to produce crops and at the same time be able to maintain production without failing. With growing populations in urban areas, the importance of urban agriculture has become increasingly important. This research aims to study the factors that contribute to the success and failure of selected urban agricultural projects within the Nelson Mandela Bay by looking at how the community benefits from two selected community projects. It is however important to note that there are various factors contributing to the success and failure of any project. This research looks into the viability of the environment that the projects are in, the level of community membership, ownership structures, how messages are communicated between stakeholders, and the purpose of the project as well as the resources available to see the project through. Urban agriculture becomes a very important practice to the urban poor, as it subsidizes household income when the produce is sold and reduces expenditure when it is consumed (Kirkland, 2008: 23). Zooming into the Nelson Mandela Bay, it is evident that this practice is also beneficial for the communities in which the projects operate, however, challenges such as theft make such projects dependent on funders and donors.
- Full Text:
- Date Issued: 2015
- Authors: Fadana, Yanga Yolanda
- Date: 2015
- Subjects: Agricultural development projects -- South Africa -- Eastern Cape -- Nelson Mandela Bay Municipality , Urban agriculture -- South Africa -- Eastern Cape -- Nelson Mandela Bay Municipality -- Economic aspects , Land use, Urban -- South Africa -- Eastern Cape -- Nelson Mandela Bay Municipality
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/8306 , vital:26321
- Description: Sustainable agriculture is explained by Reddy (1995: 22) as the ability for agricultural projects to produce crops and at the same time be able to maintain production without failing. With growing populations in urban areas, the importance of urban agriculture has become increasingly important. This research aims to study the factors that contribute to the success and failure of selected urban agricultural projects within the Nelson Mandela Bay by looking at how the community benefits from two selected community projects. It is however important to note that there are various factors contributing to the success and failure of any project. This research looks into the viability of the environment that the projects are in, the level of community membership, ownership structures, how messages are communicated between stakeholders, and the purpose of the project as well as the resources available to see the project through. Urban agriculture becomes a very important practice to the urban poor, as it subsidizes household income when the produce is sold and reduces expenditure when it is consumed (Kirkland, 2008: 23). Zooming into the Nelson Mandela Bay, it is evident that this practice is also beneficial for the communities in which the projects operate, however, challenges such as theft make such projects dependent on funders and donors.
- Full Text:
- Date Issued: 2015
The isolation, characterisation and chemotaxonomic significance of secondary metabolites from selected South African Laurencia spp. Rhodophyta
- Authors: Fakee, Jameel
- Date: 2015
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/64696 , vital:28593
- Description: Bioprospection of marine organisms as a potential source for lead drugs is becoming increasingly popular. The secondary metabolome of these organisms consists of structurally diverse molecules possessing unprecedented carbon skeletons, the biosynthesis of which occurs via complex metabolomic pathways driven by specialist enzymes. This structural novelty is highly influential on the favourable bioactivity these compounds display. A prominent example of such a compound is trabectedin marketed as Yondelis®. Registered for the treatment of soft tissue sarcomas, this marine drug was developed from extracts of the tunicate Ecteinascidia turbinata. South Africa is renowned for possessing a highly diverse marine biota including several endemic species of marine red algae belonging to the Laurencia sensu stricto genus, which falls within the Laurencia complex. Despite having a good reputation for fascinating secondary metabolites, the taxonomy of Laurencia natural products is proving challenging for reasons including the presence of cryptic species, as well as individual species displaying morphological variability. The aim of this study was thus to isolate secondary metabolites from various South African Laurencia spp. and subsequently assess their chemotaxonomic significance by analysis of a parallel plastid rbcL phylogeny study of Laurencia spp. This study reports the first phycochemical investigation into Laurencia natalensis Kylin, Laurencia cf. corymbosa J.Agardh, Laurencia complanata (Suhr) Kützing, Laurencia sodwaniensis Francis, Bolton, Mattio and Anderson submitted, Laurencia multiclavata Francis, Bolton, Mattio and Anderson submitted, and a South African specimen of Laurenciella marilzae Gil-Rodríguez, Sentíes, Díaz-Larrea, Cassano and M.T. Fujii (basionym: Laurencia marilzae) originally described from Spain. Additionally, the chemical profiles of previously explored species Laurencia flexuosa Kützing and Laurencia glomerata Kützing were re-investigated. The organic extracts of the above species afforded 31 compounds belonging to a wide array of structural classes including halo-chamigranes, linear C15 acetogenins, indole alkaloids, cuparanes and cyclic bromo-ethers. A new tri-cyclic keto-cuparane (4.4) was isolated from L.cf. corymbosa alongside the new cuparanes 4.1 and 4.7. Algoane (5.9), a unique marker compound isolated from L. natalensis, was previously only reported from a sea-hare. Such marker compounds which are exclusive to an individual algal species increase the ease of their subsequent identification. The feasibility of chemotaxonomy as an additional tool to classify Laurencia spp. Was established as broad predictions of a specimen’s phylogeny, based on representatives of its secondary metabolome, proved viable. The study specimens were shown to possess similar chemical profiles to their sister species e.g. L. complanata, L. sodwaniensis and L. multiclavata produced similar metabolites to their sister species as inferred by an rbcL phylogeny tree. Finally, a 1H NMR profiling study on the crude organic extracts of various Laurencia spp. generated distinctive, reproducible spectra, exposing the value of NMR spectroscopy as a rudimentary species discernment tool.
- Full Text:
- Date Issued: 2015
- Authors: Fakee, Jameel
- Date: 2015
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/64696 , vital:28593
- Description: Bioprospection of marine organisms as a potential source for lead drugs is becoming increasingly popular. The secondary metabolome of these organisms consists of structurally diverse molecules possessing unprecedented carbon skeletons, the biosynthesis of which occurs via complex metabolomic pathways driven by specialist enzymes. This structural novelty is highly influential on the favourable bioactivity these compounds display. A prominent example of such a compound is trabectedin marketed as Yondelis®. Registered for the treatment of soft tissue sarcomas, this marine drug was developed from extracts of the tunicate Ecteinascidia turbinata. South Africa is renowned for possessing a highly diverse marine biota including several endemic species of marine red algae belonging to the Laurencia sensu stricto genus, which falls within the Laurencia complex. Despite having a good reputation for fascinating secondary metabolites, the taxonomy of Laurencia natural products is proving challenging for reasons including the presence of cryptic species, as well as individual species displaying morphological variability. The aim of this study was thus to isolate secondary metabolites from various South African Laurencia spp. and subsequently assess their chemotaxonomic significance by analysis of a parallel plastid rbcL phylogeny study of Laurencia spp. This study reports the first phycochemical investigation into Laurencia natalensis Kylin, Laurencia cf. corymbosa J.Agardh, Laurencia complanata (Suhr) Kützing, Laurencia sodwaniensis Francis, Bolton, Mattio and Anderson submitted, Laurencia multiclavata Francis, Bolton, Mattio and Anderson submitted, and a South African specimen of Laurenciella marilzae Gil-Rodríguez, Sentíes, Díaz-Larrea, Cassano and M.T. Fujii (basionym: Laurencia marilzae) originally described from Spain. Additionally, the chemical profiles of previously explored species Laurencia flexuosa Kützing and Laurencia glomerata Kützing were re-investigated. The organic extracts of the above species afforded 31 compounds belonging to a wide array of structural classes including halo-chamigranes, linear C15 acetogenins, indole alkaloids, cuparanes and cyclic bromo-ethers. A new tri-cyclic keto-cuparane (4.4) was isolated from L.cf. corymbosa alongside the new cuparanes 4.1 and 4.7. Algoane (5.9), a unique marker compound isolated from L. natalensis, was previously only reported from a sea-hare. Such marker compounds which are exclusive to an individual algal species increase the ease of their subsequent identification. The feasibility of chemotaxonomy as an additional tool to classify Laurencia spp. Was established as broad predictions of a specimen’s phylogeny, based on representatives of its secondary metabolome, proved viable. The study specimens were shown to possess similar chemical profiles to their sister species e.g. L. complanata, L. sodwaniensis and L. multiclavata produced similar metabolites to their sister species as inferred by an rbcL phylogeny tree. Finally, a 1H NMR profiling study on the crude organic extracts of various Laurencia spp. generated distinctive, reproducible spectra, exposing the value of NMR spectroscopy as a rudimentary species discernment tool.
- Full Text:
- Date Issued: 2015
Effects of natural antioxidants and thermal treatment on quality of meat from Bonsmara and non-descripts cattle
- Authors: Falowo, Andrew Bamidele
- Date: 2015
- Subjects: Meat -- Preservation Antioxidants Meat -- Microbiology
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/2589 , vital:27906
- Description: The broad objective of this study was to determine the effects of natural antioxidants and thermal treatment on quality of meat from Bonsmara and non-descript cattle. A survey was conducted among 222 consumers in Alice (Fort Hare University community), Eastern Cape Province to determine the level of their awareness on application of antioxidants as preservatives in meat and meat products during storage. Representative samples of Muscularis longissimuss thoracis et lumborum and liver were collected from each carcass of Bonsmara (n=40) and non-descript (n=40) cattle reared on natural pasture to determine the effect of natural antioxidants and thermal treatment on their quality. The results from the survey revealed that 51.35 percent of the respondents had not heard about the use of antioxidant as preservatives in meat products. However, among the remaining respondents (48.65 percent) that were aware of antioxidant and its use as preservative, about 19 percent knew of natural antioxidants, 35 percent synthetic antioxidants while 46 percent had knowledge of both. The results further revealed that the majority of the respondents (82 percent) that had knowledge of natural antioxidants were concerned about the use of synthetic antioxidants in meat and meat products due to their health consequences. The in vitro antioxidant and antibacterial analyses of Bidens pilosa and Moringa oleifera leaf extracts revealed that they contain rich bioactive compounds. Furthermore, the addition of leaf extracts from Moringa oleifera (ML, 0.05 and 0.1 percent w/w) and Biden pilosa (BP, 0.05 and 0.1 percent w/w) to ground raw beef as a natural antioxidant were found to improve the physicochemical, oxidative stability and microbiological qualities of meat compared to the control (meat without extract) and BHT treatment (0.02 percent w/w) during 6 days storage at 40 C. Cattle breed did not have much effect on colour parameters. However, the overall pH of ground beef treated with extracts showed lower values than control and BHT treated beef. Also, ground beef samples containing extracts exhibited (P < 0.05) better colour stability, especially higher redness (a* values), than the control. The formation of TBARS in beef samples treated with extracts was significantly (P < 0.05) lower than the control and BHT treatment. The antibacterial assay of the extracts revealed an appreciable broad spectrum activity against the tested bacteria and microbial counts in ground beef samples compared to control and BHT group. Ground beef treated with plant extracts exhibited lower microbial and lactic acid bacterial counts (P < 0.05) at day 0 and 3 than control samples. Moreover, it was observed that application of sous vides thermal method did not significantly affect the fatty acids and mineral loss in beef and liver across the treatments. However, the total concentration of MUFA was lower in raw liver (20.11±2.38 - 21.08±1.23 percent) than in beef (40.22±1.90 - 42.53±1.29 percent), while total PUFA content were higher in liver (30.73±2.60 - 31.11±1.19 percent) than in beef samples (10.13±3.36 - 11.02±2.74 percent) (p < 0.05). The results also revealed that liver samples from Bonsmara and non-descript cattle had a higher percentage of intramuscular fat content of 4.67 ± 0.53 percent and 4.44 ± 0.53 percent respectively, and fat free dry matter of 27.51 ± 1.05 percent and 25.73 ± 1.05 percent, respectively, than the beef samples (p < 0.05). The concentrations of Mg (52.80±0.22 - 53.70±0.02mg/100g) and Zn (8.90±0.15 - 19.60±0.15mg/100g) were higher in beef than liver samples. The level of Ca (17.00±0.17 - 17.50 ± 0.17mg/100g) in liver was higher than that of beef samples. It was concluded that most consumers preferred the use of natural antioxidants in meat products than synthetic antioxidants due to their health risk. The effectiveness of M. oleifera and B. pilosa leaf extracts on meat quality also revealed that these plants are promising candidates as natural preservatives and their application should be considered in the meat industry. Lastly, findings from this study showed that application of the sous vide technique could protect meat products from nutritional loss during thermal treatment.
- Full Text:
- Date Issued: 2015
- Authors: Falowo, Andrew Bamidele
- Date: 2015
- Subjects: Meat -- Preservation Antioxidants Meat -- Microbiology
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/2589 , vital:27906
- Description: The broad objective of this study was to determine the effects of natural antioxidants and thermal treatment on quality of meat from Bonsmara and non-descript cattle. A survey was conducted among 222 consumers in Alice (Fort Hare University community), Eastern Cape Province to determine the level of their awareness on application of antioxidants as preservatives in meat and meat products during storage. Representative samples of Muscularis longissimuss thoracis et lumborum and liver were collected from each carcass of Bonsmara (n=40) and non-descript (n=40) cattle reared on natural pasture to determine the effect of natural antioxidants and thermal treatment on their quality. The results from the survey revealed that 51.35 percent of the respondents had not heard about the use of antioxidant as preservatives in meat products. However, among the remaining respondents (48.65 percent) that were aware of antioxidant and its use as preservative, about 19 percent knew of natural antioxidants, 35 percent synthetic antioxidants while 46 percent had knowledge of both. The results further revealed that the majority of the respondents (82 percent) that had knowledge of natural antioxidants were concerned about the use of synthetic antioxidants in meat and meat products due to their health consequences. The in vitro antioxidant and antibacterial analyses of Bidens pilosa and Moringa oleifera leaf extracts revealed that they contain rich bioactive compounds. Furthermore, the addition of leaf extracts from Moringa oleifera (ML, 0.05 and 0.1 percent w/w) and Biden pilosa (BP, 0.05 and 0.1 percent w/w) to ground raw beef as a natural antioxidant were found to improve the physicochemical, oxidative stability and microbiological qualities of meat compared to the control (meat without extract) and BHT treatment (0.02 percent w/w) during 6 days storage at 40 C. Cattle breed did not have much effect on colour parameters. However, the overall pH of ground beef treated with extracts showed lower values than control and BHT treated beef. Also, ground beef samples containing extracts exhibited (P < 0.05) better colour stability, especially higher redness (a* values), than the control. The formation of TBARS in beef samples treated with extracts was significantly (P < 0.05) lower than the control and BHT treatment. The antibacterial assay of the extracts revealed an appreciable broad spectrum activity against the tested bacteria and microbial counts in ground beef samples compared to control and BHT group. Ground beef treated with plant extracts exhibited lower microbial and lactic acid bacterial counts (P < 0.05) at day 0 and 3 than control samples. Moreover, it was observed that application of sous vides thermal method did not significantly affect the fatty acids and mineral loss in beef and liver across the treatments. However, the total concentration of MUFA was lower in raw liver (20.11±2.38 - 21.08±1.23 percent) than in beef (40.22±1.90 - 42.53±1.29 percent), while total PUFA content were higher in liver (30.73±2.60 - 31.11±1.19 percent) than in beef samples (10.13±3.36 - 11.02±2.74 percent) (p < 0.05). The results also revealed that liver samples from Bonsmara and non-descript cattle had a higher percentage of intramuscular fat content of 4.67 ± 0.53 percent and 4.44 ± 0.53 percent respectively, and fat free dry matter of 27.51 ± 1.05 percent and 25.73 ± 1.05 percent, respectively, than the beef samples (p < 0.05). The concentrations of Mg (52.80±0.22 - 53.70±0.02mg/100g) and Zn (8.90±0.15 - 19.60±0.15mg/100g) were higher in beef than liver samples. The level of Ca (17.00±0.17 - 17.50 ± 0.17mg/100g) in liver was higher than that of beef samples. It was concluded that most consumers preferred the use of natural antioxidants in meat products than synthetic antioxidants due to their health risk. The effectiveness of M. oleifera and B. pilosa leaf extracts on meat quality also revealed that these plants are promising candidates as natural preservatives and their application should be considered in the meat industry. Lastly, findings from this study showed that application of the sous vide technique could protect meat products from nutritional loss during thermal treatment.
- Full Text:
- Date Issued: 2015
An evaluation of security issues in cloud-based file sharing technologies
- Authors: Fana, Akhona
- Date: 2015
- Subjects: Cloud computing -- Security measures Computer networks -- Security measures Computer security
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/1841 , vital:27565
- Description: Cloud computing is one of the most promising technologies for backup and data storage that provides flexible access to data. Cloud computing plays a vital role in remote backup. It is so unfortunate that this computing technique has flaws that thrilled and edgy end users in implementing it effectively. These flaws include factors like lack of integrity, confidentiality and privacy to information. A secure cloud is impossible unless the computer-generated environment is appropriately secured. In any form of technology it is always advisable that security challenges must be prior identified and fixed before the implementation of that particular technology. Primarily, this study will focus on finding security issues in cloud computing with the objective of finding concerns like credential theft and session management in the ―Cloud‖. Main arguments like HTTP banner disclosure, Bash ―ShellShock‖ Injection and password issues were discovered during the stages of study implementation. These challenges may provide information that will permit hackers in manipulating and exploiting cloud environment. Identifying credential theft and session management in cloud-based file sharing technologies a mixed method approach was implemented throughout the course of the study due to the nature of study and unity of analysis. Penetration tests were performed as security testing technique. Prevention and guideline of security threats leads to a friendly and authentic world of technology.
- Full Text:
- Date Issued: 2015
- Authors: Fana, Akhona
- Date: 2015
- Subjects: Cloud computing -- Security measures Computer networks -- Security measures Computer security
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/1841 , vital:27565
- Description: Cloud computing is one of the most promising technologies for backup and data storage that provides flexible access to data. Cloud computing plays a vital role in remote backup. It is so unfortunate that this computing technique has flaws that thrilled and edgy end users in implementing it effectively. These flaws include factors like lack of integrity, confidentiality and privacy to information. A secure cloud is impossible unless the computer-generated environment is appropriately secured. In any form of technology it is always advisable that security challenges must be prior identified and fixed before the implementation of that particular technology. Primarily, this study will focus on finding security issues in cloud computing with the objective of finding concerns like credential theft and session management in the ―Cloud‖. Main arguments like HTTP banner disclosure, Bash ―ShellShock‖ Injection and password issues were discovered during the stages of study implementation. These challenges may provide information that will permit hackers in manipulating and exploiting cloud environment. Identifying credential theft and session management in cloud-based file sharing technologies a mixed method approach was implemented throughout the course of the study due to the nature of study and unity of analysis. Penetration tests were performed as security testing technique. Prevention and guideline of security threats leads to a friendly and authentic world of technology.
- Full Text:
- Date Issued: 2015
Drought management strategies and poverty alleviation in Zimbabwe : the case of Mwenezi District
- Authors: Farai, Magaisa David
- Date: 2015
- Subjects: Droughts--Zimbabwe--Management Zimbabwe--Economic conditions Poverty--Zimbabwe
- Language: English
- Type: Thesis , Masters , Development Studies
- Identifier: http://hdl.handle.net/10353/16091 , vital:40663
- Description: Drought remains a huge challenge in Africa, particularly in Zimbabwe. The study investigated the effectiveness of drought management strategies and poverty alleviation in Zimbabwe with particular focus on Mwenezi District. In order to come up with a comprehensive investigation, the researcher grounded the study in sustainable livelihood approach and the community driven development theory. Due to drought being the number one disaster in Zimbabwe, the government and NGOs have collectively come up with strategies aimed at ameliorating the impact of drought in the area. The study employed a qualitative methodology as it provided an understanding and description of people’s personal experiences of drought. The study investigated the roles of both the government and NGOs involved in drought management in the district. NGOs and Government institutions charged with drought relief implement various programmes designed to manage drought in this area. This study’s findings were that cattle rearing, provision of food aid, provision of seed packs, supplementary feeding, among other programmes, are being implemented in the district to curb drought. Local people in the area have adopted a number of strategies so as to cope with drought effects. These strategies include growing of drought-resistant crops, livestock selling, change of farming methods, informal cross-border trading and establishing gardening plots. The Zimbabwean government has been criticised for being reactive rather than being proactive when it comes to drought management. The study further calls for improved and effective policies to tackle drought and poverty in the area. Effective monitoring and evaluation of programmes designed to manage drought should be prioritised if ever drought is to be effectively managed.
- Full Text:
- Date Issued: 2015
- Authors: Farai, Magaisa David
- Date: 2015
- Subjects: Droughts--Zimbabwe--Management Zimbabwe--Economic conditions Poverty--Zimbabwe
- Language: English
- Type: Thesis , Masters , Development Studies
- Identifier: http://hdl.handle.net/10353/16091 , vital:40663
- Description: Drought remains a huge challenge in Africa, particularly in Zimbabwe. The study investigated the effectiveness of drought management strategies and poverty alleviation in Zimbabwe with particular focus on Mwenezi District. In order to come up with a comprehensive investigation, the researcher grounded the study in sustainable livelihood approach and the community driven development theory. Due to drought being the number one disaster in Zimbabwe, the government and NGOs have collectively come up with strategies aimed at ameliorating the impact of drought in the area. The study employed a qualitative methodology as it provided an understanding and description of people’s personal experiences of drought. The study investigated the roles of both the government and NGOs involved in drought management in the district. NGOs and Government institutions charged with drought relief implement various programmes designed to manage drought in this area. This study’s findings were that cattle rearing, provision of food aid, provision of seed packs, supplementary feeding, among other programmes, are being implemented in the district to curb drought. Local people in the area have adopted a number of strategies so as to cope with drought effects. These strategies include growing of drought-resistant crops, livestock selling, change of farming methods, informal cross-border trading and establishing gardening plots. The Zimbabwean government has been criticised for being reactive rather than being proactive when it comes to drought management. The study further calls for improved and effective policies to tackle drought and poverty in the area. Effective monitoring and evaluation of programmes designed to manage drought should be prioritised if ever drought is to be effectively managed.
- Full Text:
- Date Issued: 2015
Photophysical studies of Zinc phthalocyanine-silica nanoparticles conjugates
- Authors: Fashina, Adedayo
- Date: 2015
- Subjects: Nanoparticles , Phthalocyanines , Zinc , Silica , Photochemistry , Adsorption
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4537 , http://hdl.handle.net/10962/d1017917
- Description: This thesis reports on the synthesis and characterization of both symmetrical and asymmetrical Zinc phthalocyanine complexes. The complexes contained groups such as carboxylic, amino and alkyne for covalent grafting to the surface of silica nanoparticles. The use of symmetrical and asymmetrical complexes was geared towards comparing the non-specific binding of the symmetrical complexes to the specific binding observed in the asymmetrical complexes. The complexes were also doped within the silica matrix and compared to the surface grafted conjugates. The complexes and the conjugates were well characterized with a variety of techniques. The fluorescence lifetimes of the phthalocyanine complexes containing either terminal carboxylic groups or an alkyne group showed a mono-exponential decay while the amino containing phthalocyanine complexes gave a bi-exponential decay. A similar trend was observed for their respective conjugates. Some of the conjugates of the asymmetrical complexes showed a decrease in fluorescence lifetimes and a corresponding decrease in fluorescence quantum yields. The fluorescence quantum yields for all the symmetrical complexes studied showed either an improvement or retained the luminescence of the grafted phthalocyanine complex. Most of the conjugates showed a faster intersystem crossing time in comparison to the complexes alone. The grafted or doped conjugates containing symmetrical phthalocyanine complexes with carboxyl groups showed improvements both in fluorescence and triplet quantum yields. All the conjugates except two showed an increase in triplet lifetimes when compared to their respective phthalocyanine complexes. Optical nonlinearities of nine of the phthalocyanine complexes were studied and all the complexes showed characteristic reverse saturable absorption behavior. Complex 10 showed the most promising optical limiting behavior. The aggregation and dissolution studies of the conjugates were also carried out in a simulated biological medium and the silicon level detected was noticed to have increased with incubation time.
- Full Text:
- Date Issued: 2015
- Authors: Fashina, Adedayo
- Date: 2015
- Subjects: Nanoparticles , Phthalocyanines , Zinc , Silica , Photochemistry , Adsorption
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4537 , http://hdl.handle.net/10962/d1017917
- Description: This thesis reports on the synthesis and characterization of both symmetrical and asymmetrical Zinc phthalocyanine complexes. The complexes contained groups such as carboxylic, amino and alkyne for covalent grafting to the surface of silica nanoparticles. The use of symmetrical and asymmetrical complexes was geared towards comparing the non-specific binding of the symmetrical complexes to the specific binding observed in the asymmetrical complexes. The complexes were also doped within the silica matrix and compared to the surface grafted conjugates. The complexes and the conjugates were well characterized with a variety of techniques. The fluorescence lifetimes of the phthalocyanine complexes containing either terminal carboxylic groups or an alkyne group showed a mono-exponential decay while the amino containing phthalocyanine complexes gave a bi-exponential decay. A similar trend was observed for their respective conjugates. Some of the conjugates of the asymmetrical complexes showed a decrease in fluorescence lifetimes and a corresponding decrease in fluorescence quantum yields. The fluorescence quantum yields for all the symmetrical complexes studied showed either an improvement or retained the luminescence of the grafted phthalocyanine complex. Most of the conjugates showed a faster intersystem crossing time in comparison to the complexes alone. The grafted or doped conjugates containing symmetrical phthalocyanine complexes with carboxyl groups showed improvements both in fluorescence and triplet quantum yields. All the conjugates except two showed an increase in triplet lifetimes when compared to their respective phthalocyanine complexes. Optical nonlinearities of nine of the phthalocyanine complexes were studied and all the complexes showed characteristic reverse saturable absorption behavior. Complex 10 showed the most promising optical limiting behavior. The aggregation and dissolution studies of the conjugates were also carried out in a simulated biological medium and the silicon level detected was noticed to have increased with incubation time.
- Full Text:
- Date Issued: 2015
The adoption of a police and judicial co-operation regime for the African Union
- Authors: Fazekas, Boglar
- Date: 2015
- Subjects: Law enforcement -- Africa , Judicial assistance -- Africa , Criminal justice, Administration of -- Africa , Crime prevention -- International cooperation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/4440 , vital:20601
- Description: In 1991 the Treaty enacting the African Economic Community (AEC)1 was signed by the African Heads of State and Government.2 The AEC aims to establish regional free markets that would then be transformed into a continent-wide single market in six subsequent stages enabling the free movement of persons, goods, services, and capital until 2025 at the latest.3 However, to make sure that the free movement of persons in Africa would not also become a "free flow of criminals", the installation of a common market will require intensified police and judicial co-operation, information exchange and external border controls. 1 Treaty Establishing the African Economic Community adopted by the Heads of State and Government of Member States of the Organisation of African Unity in Abuja, Nigeria, 3 June 1991. 2 Art. 6(1) Treaty Establishing the African Economic Community. 3 Arts. 4(2)(h) and 4(2)(i) Treaty Establishing the African Economic Community. Furthermore, the age of globalisation calls into question the traditional concepts of sovereignty. Nowadays individual states are often unable to supervise their complete territory and battle to guard their borders against unwanted goods, people and ideas. Many facets of globalisation - including fast technological development and social and economic interaction - encourage governments to cooperate in order to try to achieve objectives that, acting on their own, they may not believe they can accomplish. Or to express the same thought in its negative sense: to fight unwanted consequences of this development, acting on their own, the states may not be able to achieve. This means that sooner or later the African States will have to address the problem of how to develop a police and judicial regime in criminal matters in order to fight against organised transnational crime. The question therefore is not whether the African States should engage in police and judicial co-operation, but rather what form it should take. The aim of this master treatise is to define the cornerstones of a possible future adoption of a police and judicial regime for the African Union (AU). There are numerous police and judicial co-operations around the world of various types so to make the task more manageable this treaty looks at the European Union (EU) in some detail and uses it as an example or as a guideline to sketch out a possible development of a police and judicial co-operation within the AU. This is for the reason that the EU has succeeded in creating a sophisticated regime of police and judicial co-operation and thus serves as a model of how co-operation levels can be created, handled, and preserved. The EU also serves as an example of how certain obstacles can make co-operation difficult or even prevent efforts for an effective transnational police and judicial co-operation. However, the current EU is the result of the specific circumstances in which its Member States and organs have responded to the economic and political changes they have been faced with. The AU has to operate amidst a political setting and various other circumstances that are very different. As a result the police and judicial co-operation regime of the AU will be very different from the EU model. This treatise argues that due to the vast number of participating states in the AU and the AU's decision-making practice, the continental level is not an appropriate point of departure for the AU to adopt a police and judicial co-operation regime. Police and judicial co-operation within the AU will at first have to be pursued at a sub-regional level. The co-operation should start at the already subdivided Regional Economic Communities (RECs) established by the AEC. Only in time, if at all, will the sub-regional markets be prepared to merge into a continent-wide integration. This is why at the present time the AU will have to accept a mere supervising and stimulating part in pursuing the ultimate objective of developing a police and judicial co-operation on a continent-wide level. Furthermore, this treatise assesses that the huge number of economic, social, and political challenges impair the AU's action ability with the result that it will not be able to establish a supranational legal body comparable to that of the EU in the near future. Also, the African Heads of State and Government are too interested in keeping their sovereign powers to themselves. This is why in Africa integration is more likely to be achieved with an intergovernmental approach. Therefore, police and judicial co-operation should first be exercised by means of informal meetings of the Interior and Justice Ministers and any resulting acts should be classified as (traditional) public international law. This is not to imply that the AU has no role to play here, for said meetings will have to be coordinated and supervised. In order to do justice to its supervising role it is necessary to empower the organs of the AU. This treatise analyses that for the AU to establish an efficient institutional framework, it is extremely important that the Assembly's monopoly over proposing legislation and establishing new organs is changed. Consensus decisions between fifty-four Member States would in an optimal case be replaced by a system where no organ is in total control. Finally, this treatise emphasises the necessity to push ahead with the development of the regional free markets as envisioned by the AEC. Similar to the development in the EU, this will bring about new challenges in combating new types of transnational crimes. This treatise demonstrates that this challenge might bring the necessary momentum to formally introduce police and judicial co-operation in criminal matters, usually a high policy area, on the agenda of the AU. In conclusion, this treatise shows that co-operation in such a sensitive area as security policy first and foremost needs a sufficient amount of trust between the decision makers of the involved states. To develop this necessary trust and the processes building upon this, this treatise argues that a regular meeting between the Interior and Justice Ministers, either inside or outside the framework of the AU, should be launched. Through these meetings the AU could gradually develop a platform for discussion in the area of criminal law and thereby slowly intensify its information exchange and operational co-operation. The history of the EU has shown that the development of a supranational legal system first and foremost requires mutual trust in each other's respective legal systems. Trust is generated by communication in an informal atmosphere. Therefore, this treatise argues that a colloquial intergovernmental co-operation within the field of criminal law is the correct approach for the AU to develop a police and judicial co-operation in criminal matters.
- Full Text:
- Date Issued: 2015
- Authors: Fazekas, Boglar
- Date: 2015
- Subjects: Law enforcement -- Africa , Judicial assistance -- Africa , Criminal justice, Administration of -- Africa , Crime prevention -- International cooperation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/4440 , vital:20601
- Description: In 1991 the Treaty enacting the African Economic Community (AEC)1 was signed by the African Heads of State and Government.2 The AEC aims to establish regional free markets that would then be transformed into a continent-wide single market in six subsequent stages enabling the free movement of persons, goods, services, and capital until 2025 at the latest.3 However, to make sure that the free movement of persons in Africa would not also become a "free flow of criminals", the installation of a common market will require intensified police and judicial co-operation, information exchange and external border controls. 1 Treaty Establishing the African Economic Community adopted by the Heads of State and Government of Member States of the Organisation of African Unity in Abuja, Nigeria, 3 June 1991. 2 Art. 6(1) Treaty Establishing the African Economic Community. 3 Arts. 4(2)(h) and 4(2)(i) Treaty Establishing the African Economic Community. Furthermore, the age of globalisation calls into question the traditional concepts of sovereignty. Nowadays individual states are often unable to supervise their complete territory and battle to guard their borders against unwanted goods, people and ideas. Many facets of globalisation - including fast technological development and social and economic interaction - encourage governments to cooperate in order to try to achieve objectives that, acting on their own, they may not believe they can accomplish. Or to express the same thought in its negative sense: to fight unwanted consequences of this development, acting on their own, the states may not be able to achieve. This means that sooner or later the African States will have to address the problem of how to develop a police and judicial regime in criminal matters in order to fight against organised transnational crime. The question therefore is not whether the African States should engage in police and judicial co-operation, but rather what form it should take. The aim of this master treatise is to define the cornerstones of a possible future adoption of a police and judicial regime for the African Union (AU). There are numerous police and judicial co-operations around the world of various types so to make the task more manageable this treaty looks at the European Union (EU) in some detail and uses it as an example or as a guideline to sketch out a possible development of a police and judicial co-operation within the AU. This is for the reason that the EU has succeeded in creating a sophisticated regime of police and judicial co-operation and thus serves as a model of how co-operation levels can be created, handled, and preserved. The EU also serves as an example of how certain obstacles can make co-operation difficult or even prevent efforts for an effective transnational police and judicial co-operation. However, the current EU is the result of the specific circumstances in which its Member States and organs have responded to the economic and political changes they have been faced with. The AU has to operate amidst a political setting and various other circumstances that are very different. As a result the police and judicial co-operation regime of the AU will be very different from the EU model. This treatise argues that due to the vast number of participating states in the AU and the AU's decision-making practice, the continental level is not an appropriate point of departure for the AU to adopt a police and judicial co-operation regime. Police and judicial co-operation within the AU will at first have to be pursued at a sub-regional level. The co-operation should start at the already subdivided Regional Economic Communities (RECs) established by the AEC. Only in time, if at all, will the sub-regional markets be prepared to merge into a continent-wide integration. This is why at the present time the AU will have to accept a mere supervising and stimulating part in pursuing the ultimate objective of developing a police and judicial co-operation on a continent-wide level. Furthermore, this treatise assesses that the huge number of economic, social, and political challenges impair the AU's action ability with the result that it will not be able to establish a supranational legal body comparable to that of the EU in the near future. Also, the African Heads of State and Government are too interested in keeping their sovereign powers to themselves. This is why in Africa integration is more likely to be achieved with an intergovernmental approach. Therefore, police and judicial co-operation should first be exercised by means of informal meetings of the Interior and Justice Ministers and any resulting acts should be classified as (traditional) public international law. This is not to imply that the AU has no role to play here, for said meetings will have to be coordinated and supervised. In order to do justice to its supervising role it is necessary to empower the organs of the AU. This treatise analyses that for the AU to establish an efficient institutional framework, it is extremely important that the Assembly's monopoly over proposing legislation and establishing new organs is changed. Consensus decisions between fifty-four Member States would in an optimal case be replaced by a system where no organ is in total control. Finally, this treatise emphasises the necessity to push ahead with the development of the regional free markets as envisioned by the AEC. Similar to the development in the EU, this will bring about new challenges in combating new types of transnational crimes. This treatise demonstrates that this challenge might bring the necessary momentum to formally introduce police and judicial co-operation in criminal matters, usually a high policy area, on the agenda of the AU. In conclusion, this treatise shows that co-operation in such a sensitive area as security policy first and foremost needs a sufficient amount of trust between the decision makers of the involved states. To develop this necessary trust and the processes building upon this, this treatise argues that a regular meeting between the Interior and Justice Ministers, either inside or outside the framework of the AU, should be launched. Through these meetings the AU could gradually develop a platform for discussion in the area of criminal law and thereby slowly intensify its information exchange and operational co-operation. The history of the EU has shown that the development of a supranational legal system first and foremost requires mutual trust in each other's respective legal systems. Trust is generated by communication in an informal atmosphere. Therefore, this treatise argues that a colloquial intergovernmental co-operation within the field of criminal law is the correct approach for the AU to develop a police and judicial co-operation in criminal matters.
- Full Text:
- Date Issued: 2015
Teachers’ practices of ‘cooperative learning’ instructional technique in six schools: Implications for learner performance in Mathematics
- Authors: Febana, Papama
- Date: 2015
- Subjects: Group work in education -- South Africa -- Eastern Cape Team learning approach in education -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5094 , vital:29075
- Description: One of the key features of curriculum change in South Africa in the last twenty years has been a move away from teacher centred instructional techniques to those that promote active participation of learners in their learning. Although the post democratic National Curriculum Statement has put emphasis on the importance of cooperative learning as a learner centred instructional technique, there is hardly any research on how teachers in schools understand and use it. This study sought to fill this gap by using a case study of seven mathematics classes in six schools. Data was collected through interviews, observations and document analysis.
- Full Text:
- Date Issued: 2015
- Authors: Febana, Papama
- Date: 2015
- Subjects: Group work in education -- South Africa -- Eastern Cape Team learning approach in education -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5094 , vital:29075
- Description: One of the key features of curriculum change in South Africa in the last twenty years has been a move away from teacher centred instructional techniques to those that promote active participation of learners in their learning. Although the post democratic National Curriculum Statement has put emphasis on the importance of cooperative learning as a learner centred instructional technique, there is hardly any research on how teachers in schools understand and use it. This study sought to fill this gap by using a case study of seven mathematics classes in six schools. Data was collected through interviews, observations and document analysis.
- Full Text:
- Date Issued: 2015
An evaluation of the implementation of education training and development policy in the Eastern Cape: the case of Cacadu health district
- Authors: Feni, Monde Ludick
- Date: 2015
- Subjects: Employees -- Training of -- Evaluation , Manpower policy -- South Africa , Personnel management -- South Africa
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/8261 , vital:26317
- Description: The purpose of this study was to evaluate the implementation of the Education, Training and Development Policy of the Eastern Cape Department of Health: A Case Study of Cacadu District. The Cacadu Health District as with all Districts is the Eastern Cape Department of Health experiences a few challenges with the implementation of the Education, Training and Development Policy. Through observation these problems seem to be stalling progress in the implementation of this policy. The study seeks to investigate whether there can be an improvement in the implementation of the Education, Training and Development Policy. The focus of the study will be the Cacadu Health District. Provision of Education, Training and Development is key to any organisation especially if performance of employees needs to be of high standard. If the performance of employees is of high standard service delivery will improve. Chapter one provided an introduction which gave a brief overview of the study, problem statement, research objectives and questions, preliminary literature review and research methodology to be employed by the study. Chapter two provided a literature review of education, training and development framework and legislative framework for guiding the development and provision of education, training and development in an organisation. The chapter also looked into mentoring and mentoring strategies. Chapter three looked into detail on the training evaluation strategies and what training evaluation entails. It looked at the different approaches that can be used in evaluating training in an organisation. Chapter four provides proposals for the approaches and strategies to improve the implementation of the Education, Training and Development Policy of the Eastern Cape Department of Health in the Cacadu District. The chapter will also provide an analysis of participants’ responses from the questionnaire. Chapter five will give a summary with concluding remarks and recommendations. This chapter came up with conclusions about the study and gave recommendations and way forward on how best to improve the implementation of the education, training and development policy in the Eastern Cape Department of Health: Cacadu District.
- Full Text:
- Date Issued: 2015
- Authors: Feni, Monde Ludick
- Date: 2015
- Subjects: Employees -- Training of -- Evaluation , Manpower policy -- South Africa , Personnel management -- South Africa
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/8261 , vital:26317
- Description: The purpose of this study was to evaluate the implementation of the Education, Training and Development Policy of the Eastern Cape Department of Health: A Case Study of Cacadu District. The Cacadu Health District as with all Districts is the Eastern Cape Department of Health experiences a few challenges with the implementation of the Education, Training and Development Policy. Through observation these problems seem to be stalling progress in the implementation of this policy. The study seeks to investigate whether there can be an improvement in the implementation of the Education, Training and Development Policy. The focus of the study will be the Cacadu Health District. Provision of Education, Training and Development is key to any organisation especially if performance of employees needs to be of high standard. If the performance of employees is of high standard service delivery will improve. Chapter one provided an introduction which gave a brief overview of the study, problem statement, research objectives and questions, preliminary literature review and research methodology to be employed by the study. Chapter two provided a literature review of education, training and development framework and legislative framework for guiding the development and provision of education, training and development in an organisation. The chapter also looked into mentoring and mentoring strategies. Chapter three looked into detail on the training evaluation strategies and what training evaluation entails. It looked at the different approaches that can be used in evaluating training in an organisation. Chapter four provides proposals for the approaches and strategies to improve the implementation of the Education, Training and Development Policy of the Eastern Cape Department of Health in the Cacadu District. The chapter will also provide an analysis of participants’ responses from the questionnaire. Chapter five will give a summary with concluding remarks and recommendations. This chapter came up with conclusions about the study and gave recommendations and way forward on how best to improve the implementation of the education, training and development policy in the Eastern Cape Department of Health: Cacadu District.
- Full Text:
- Date Issued: 2015
Midwives' experiences regarding the utilization of partographs in a Namibian Regional Hospital
- Authors: Fernandes, Diina
- Date: 2015
- Subjects: Midwifery -- Namibia , Labor (Obstetrics) -- Namibia
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10071 , http://hdl.handle.net/10948/d1021158
- Description: Labour has been characterized as the most dangerous journey a woman undertakes. The reason being, that although it is a natural process, many labouring women suffer complications during labour and childbirth including prolonged or obstructed labour. These complications can result in maternal and infant morbidity and mortality. The partograph is a monitoring tool that can provide a continuous pictorial overview and is essential to monitor and manage labour. It is recommended by the WHO for use universally by midwives while monitoring labour. However partographs are poorly utilized and most parameters on the partograph are not monitored and findings after reviewing a labouring woman are not documented on the partograph. It is unclear how midwives working in Namibian Health services experience and utilize the partograph during the monitoring of a woman in labour. These may be the factors that hinder the effective utilization of the partograph. The objective of this study was to explore and describe the experiences of midwives regarding the utilization of the partograph for monitoring a labouring woman in a Namibian regional hospital in order to develop guidelines based on the findings to improve the use of the partograph by midwives in order to improve the management of labour. The research design was qualitative, descriptive, explorative and contextual in nature. The research population consisted of midwives working in a regional hospital in Namibia. A purposive and convenient sampling method was used to select participants. Specific inclusion criteria were met and consent was obtained from the participants and from the Regional Health Directorate Management of the hospital where the research was conducted. Interviews were conducted by an independent interviewer within the Department of Health to ensure an unbiased viewpoint. Data were collected by means of semi-structured in depth interviews with a guide, using an audio tape recorder. Field notes were used to record non- verbal communication. As soon as data were saturated, the interviews were stopped. They were then transcribed, verbatim and analysed using the Tesch’s approach as described in (Creswell, 2009:186). The service of an independent coder was utilized to ensure trustworthiness. Trustworthiness was further ensured by using the strategies suggested by Lincoln and Guba’s model, namely credibility, transferability, dependability and confirmability. Ethical considerations were honoured throughout by adhering to ethical principles during the study. These included ensuring that the participants` rights were respected, they were not harmed and fairness were ensured. On completion of the data analysis a literature control was conducted and existing literature was compared to the findings in order to identify similarities and differences and to verify whether the literature supported the findings. Four main themes that emerged during data analysis are: Theme 1.Midwives found it a positive experience to use the partograph when caring for a woman in labour. Theme 2. When a midwife experienced problems in using the partograph, it may lead to detrimental outcomes. Theme 3. Utilizing the partograph evoked differing emotions in midwives. Theme 4. Midwives` knowledge and skills in the utilization of the partograph should be updated regularly. By describing the lived experienced of midwives in the maternity ward on the use of the partograph, the midwives had a positive attitude to using the partograph, but they also found it difficult to utilize the instrument as was directed by the (WHO) due to challenges experienced such as: unrealistic staff/patient ratio, shortage of staff, time consuming, insufficient knowledge and skills among midwives and lack of appropriate equipment. There is a specific need to prevent further negative emotions by addressing the challenges experienced. Based on the findings, guidelines for partograph utilization which aimed at improving the midwifery care were developed. Recommendations were made regarding midwifery education, clinical midwifery care and midwifery research.
- Full Text:
- Date Issued: 2015
- Authors: Fernandes, Diina
- Date: 2015
- Subjects: Midwifery -- Namibia , Labor (Obstetrics) -- Namibia
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10071 , http://hdl.handle.net/10948/d1021158
- Description: Labour has been characterized as the most dangerous journey a woman undertakes. The reason being, that although it is a natural process, many labouring women suffer complications during labour and childbirth including prolonged or obstructed labour. These complications can result in maternal and infant morbidity and mortality. The partograph is a monitoring tool that can provide a continuous pictorial overview and is essential to monitor and manage labour. It is recommended by the WHO for use universally by midwives while monitoring labour. However partographs are poorly utilized and most parameters on the partograph are not monitored and findings after reviewing a labouring woman are not documented on the partograph. It is unclear how midwives working in Namibian Health services experience and utilize the partograph during the monitoring of a woman in labour. These may be the factors that hinder the effective utilization of the partograph. The objective of this study was to explore and describe the experiences of midwives regarding the utilization of the partograph for monitoring a labouring woman in a Namibian regional hospital in order to develop guidelines based on the findings to improve the use of the partograph by midwives in order to improve the management of labour. The research design was qualitative, descriptive, explorative and contextual in nature. The research population consisted of midwives working in a regional hospital in Namibia. A purposive and convenient sampling method was used to select participants. Specific inclusion criteria were met and consent was obtained from the participants and from the Regional Health Directorate Management of the hospital where the research was conducted. Interviews were conducted by an independent interviewer within the Department of Health to ensure an unbiased viewpoint. Data were collected by means of semi-structured in depth interviews with a guide, using an audio tape recorder. Field notes were used to record non- verbal communication. As soon as data were saturated, the interviews were stopped. They were then transcribed, verbatim and analysed using the Tesch’s approach as described in (Creswell, 2009:186). The service of an independent coder was utilized to ensure trustworthiness. Trustworthiness was further ensured by using the strategies suggested by Lincoln and Guba’s model, namely credibility, transferability, dependability and confirmability. Ethical considerations were honoured throughout by adhering to ethical principles during the study. These included ensuring that the participants` rights were respected, they were not harmed and fairness were ensured. On completion of the data analysis a literature control was conducted and existing literature was compared to the findings in order to identify similarities and differences and to verify whether the literature supported the findings. Four main themes that emerged during data analysis are: Theme 1.Midwives found it a positive experience to use the partograph when caring for a woman in labour. Theme 2. When a midwife experienced problems in using the partograph, it may lead to detrimental outcomes. Theme 3. Utilizing the partograph evoked differing emotions in midwives. Theme 4. Midwives` knowledge and skills in the utilization of the partograph should be updated regularly. By describing the lived experienced of midwives in the maternity ward on the use of the partograph, the midwives had a positive attitude to using the partograph, but they also found it difficult to utilize the instrument as was directed by the (WHO) due to challenges experienced such as: unrealistic staff/patient ratio, shortage of staff, time consuming, insufficient knowledge and skills among midwives and lack of appropriate equipment. There is a specific need to prevent further negative emotions by addressing the challenges experienced. Based on the findings, guidelines for partograph utilization which aimed at improving the midwifery care were developed. Recommendations were made regarding midwifery education, clinical midwifery care and midwifery research.
- Full Text:
- Date Issued: 2015
Wireless industrial intelligent controller for a non-linear system
- Authors: Fernandes, John Manuel
- Date: 2015
- Subjects: Neural networks (Computer science) , Linear systems
- Language: English
- Type: Thesis , Masters , MEngineering (Mechatronics)
- Identifier: http://hdl.handle.net/10948/9021 , vital:26457
- Description: Modern neural network (NN) based control schemes have surmounted many of the limitations found in the traditional control approaches. Nevertheless, these modern control techniques have only recently been introduced for use on high-specification Programmable Logic Controllers (PLCs) and usually at a very high cost in terms of the required software and hardware. This ‗intelligent‘ control in the sector of industrial automation, specifically on standard PLCs thus remains an area of study that is open to further research and development. The research documented in this thesis examined the effectiveness of linear traditional control schemes such as Proportional Integral Derivative (PID), Lead and Lead-Lag control, in comparison to non-linear NN based control schemes when applied on a strongly non-linear platform. To this end, a mechatronic-type balancing system, namely, the Ball-on-Wheel (BOW) system was designed, constructed and modelled. Thereafter various traditional and intelligent controllers were implemented in order to control the system. The BOW platform may be taken to represent any single-input, single-output (SISO) non-linear system in use in the real world. The system makes use of current industrial technology including a standard PLC as the digital computational platform, a servo drive and wireless access for remote control. The results gathered from the research revealed that NN based control schemes (i.e. Pure NN and NN-PID), although comparatively slower in response, have greater advantages over traditional controllers in that they are able to adapt to external system changes as well as system non-linearity through a process of learning. These controllers also reduce the guess work that is usually involved with the traditional control approaches where cumbersome modelling, linearization or manual tuning is required. Furthermore, the research showed that online-learning adaptive traditional controllers such as the NN-PID controller which maintains the best of both the intelligent and traditional controllers may be implemented easily and with minimum expense on standard PLCs.
- Full Text:
- Date Issued: 2015
- Authors: Fernandes, John Manuel
- Date: 2015
- Subjects: Neural networks (Computer science) , Linear systems
- Language: English
- Type: Thesis , Masters , MEngineering (Mechatronics)
- Identifier: http://hdl.handle.net/10948/9021 , vital:26457
- Description: Modern neural network (NN) based control schemes have surmounted many of the limitations found in the traditional control approaches. Nevertheless, these modern control techniques have only recently been introduced for use on high-specification Programmable Logic Controllers (PLCs) and usually at a very high cost in terms of the required software and hardware. This ‗intelligent‘ control in the sector of industrial automation, specifically on standard PLCs thus remains an area of study that is open to further research and development. The research documented in this thesis examined the effectiveness of linear traditional control schemes such as Proportional Integral Derivative (PID), Lead and Lead-Lag control, in comparison to non-linear NN based control schemes when applied on a strongly non-linear platform. To this end, a mechatronic-type balancing system, namely, the Ball-on-Wheel (BOW) system was designed, constructed and modelled. Thereafter various traditional and intelligent controllers were implemented in order to control the system. The BOW platform may be taken to represent any single-input, single-output (SISO) non-linear system in use in the real world. The system makes use of current industrial technology including a standard PLC as the digital computational platform, a servo drive and wireless access for remote control. The results gathered from the research revealed that NN based control schemes (i.e. Pure NN and NN-PID), although comparatively slower in response, have greater advantages over traditional controllers in that they are able to adapt to external system changes as well as system non-linearity through a process of learning. These controllers also reduce the guess work that is usually involved with the traditional control approaches where cumbersome modelling, linearization or manual tuning is required. Furthermore, the research showed that online-learning adaptive traditional controllers such as the NN-PID controller which maintains the best of both the intelligent and traditional controllers may be implemented easily and with minimum expense on standard PLCs.
- Full Text:
- Date Issued: 2015
Push - and pull forces within outbound destination choice
- Authors: Ferreira, Daniel Petrus
- Date: 2015
- Subjects: Tourism -- Marketing Tourism -- South Africa -- Marketing Place marketing , Heritage tourism -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/11091 , vital:26884
- Description: Push- and pull forces are considered the most important motivational factors in driving tourism demand. Push forces are motivational forces that arise due to the individual’s need to travel, while pull forces are destination attributes which pull the traveller to the specific destination and in doing so they satisfy the need of the traveller. Understanding why people travel, how they go about selecting their holiday destination and why one country is preferred to the other, is vital to the continued success of the tourism industry. The needs and wants of travellers are constantly changing, therefore, it is imperative that tourism businesses excel at developing new products and services which are better suited to the needs of consumers. The primary objective of this study was to determine the push- and pull forces that influence outbound destination choice in Nelson Mandela Bay Metropole. The study investigated and analysed how the independent variables (push- and pull factors) influence destination choice (dependent variable). From a comprehensive literature review, a hypothetical model was developed to test the relationships between push-and pull forces and destination choice. Twelve hypotheses were formulated to test the relationship between four push forces, eight pull forces and destination choice. The study sought the perceptions of Nelson Mandela Bay Metropole residents and utitised the quantitative research paradigm. A survey was conducted with the aid of a structured self-administered questionnaire, distributed via e-mail and as a hard copy. A combination of convenience- and snowball sampling was utilised. The final sample comprised 302 respondents. The validity of the measuring instrument was ascertained by using exploratory factor analysis. The Cronbach’s alpha values for reliability were calculated for each of the factors identified during the exploratory factor analysis. The top ten destinations visited and intended to be visited were indicated. United Kingdom was the most visited international destination for both leisure and business purposes, while The United States of America was the most popular international destination to visit next for both leisure and business purposes. Pearson product-moment correlation and multiple regression analysis were used to test the correlation and significance of the relationships hypothesised between the various independent and dependent variables. Three statistically significant relationships were found between the push forces (physical and stature motivators and destination accessibility) and destination choice. Four statistically significant relationships were found between the pull forces (events, natural attractions, political issues and general infrastructure) and destination choice. The empirical findings further confirmed that an inter-relationship between push- and pull forces within destination choice does exist. However, pull forces influence push forces to a larger extent. Analysis of variance calculations were used to identify if significant relationships exist between the twelve demographic variables and nine reliable and valid independent variables. Furthermore, post-hoc Scheffè tests identified where the significant differences occurred between the different categories. Cohen’s d-values were calculated in order to assess the practical significance of the mean scores. A total of sixteen practical significant relationships were identified. Travel companies should compile travel packages and tours that serve the needs of both leisure- and business travellers. They can use social media as a communication- and promotion tool to entice travellers to specific destinations. The business travel packages should be all inclusive and include transportation, accommodation and even entries to events. The visual aids, utilised within the marketing material, should entice travellers to want to visit these destinations, and outline the favourable general infrastructure available. When marketing outbound destinations, travel service providers must pay attention to demographical variables such as gender, age, ethnical affiliation, income and marital status to compile travel packages that satisfy the needs of specific groups.
- Full Text:
- Date Issued: 2015
- Authors: Ferreira, Daniel Petrus
- Date: 2015
- Subjects: Tourism -- Marketing Tourism -- South Africa -- Marketing Place marketing , Heritage tourism -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/11091 , vital:26884
- Description: Push- and pull forces are considered the most important motivational factors in driving tourism demand. Push forces are motivational forces that arise due to the individual’s need to travel, while pull forces are destination attributes which pull the traveller to the specific destination and in doing so they satisfy the need of the traveller. Understanding why people travel, how they go about selecting their holiday destination and why one country is preferred to the other, is vital to the continued success of the tourism industry. The needs and wants of travellers are constantly changing, therefore, it is imperative that tourism businesses excel at developing new products and services which are better suited to the needs of consumers. The primary objective of this study was to determine the push- and pull forces that influence outbound destination choice in Nelson Mandela Bay Metropole. The study investigated and analysed how the independent variables (push- and pull factors) influence destination choice (dependent variable). From a comprehensive literature review, a hypothetical model was developed to test the relationships between push-and pull forces and destination choice. Twelve hypotheses were formulated to test the relationship between four push forces, eight pull forces and destination choice. The study sought the perceptions of Nelson Mandela Bay Metropole residents and utitised the quantitative research paradigm. A survey was conducted with the aid of a structured self-administered questionnaire, distributed via e-mail and as a hard copy. A combination of convenience- and snowball sampling was utilised. The final sample comprised 302 respondents. The validity of the measuring instrument was ascertained by using exploratory factor analysis. The Cronbach’s alpha values for reliability were calculated for each of the factors identified during the exploratory factor analysis. The top ten destinations visited and intended to be visited were indicated. United Kingdom was the most visited international destination for both leisure and business purposes, while The United States of America was the most popular international destination to visit next for both leisure and business purposes. Pearson product-moment correlation and multiple regression analysis were used to test the correlation and significance of the relationships hypothesised between the various independent and dependent variables. Three statistically significant relationships were found between the push forces (physical and stature motivators and destination accessibility) and destination choice. Four statistically significant relationships were found between the pull forces (events, natural attractions, political issues and general infrastructure) and destination choice. The empirical findings further confirmed that an inter-relationship between push- and pull forces within destination choice does exist. However, pull forces influence push forces to a larger extent. Analysis of variance calculations were used to identify if significant relationships exist between the twelve demographic variables and nine reliable and valid independent variables. Furthermore, post-hoc Scheffè tests identified where the significant differences occurred between the different categories. Cohen’s d-values were calculated in order to assess the practical significance of the mean scores. A total of sixteen practical significant relationships were identified. Travel companies should compile travel packages and tours that serve the needs of both leisure- and business travellers. They can use social media as a communication- and promotion tool to entice travellers to specific destinations. The business travel packages should be all inclusive and include transportation, accommodation and even entries to events. The visual aids, utilised within the marketing material, should entice travellers to want to visit these destinations, and outline the favourable general infrastructure available. When marketing outbound destinations, travel service providers must pay attention to demographical variables such as gender, age, ethnical affiliation, income and marital status to compile travel packages that satisfy the needs of specific groups.
- Full Text:
- Date Issued: 2015
An analysis of the risk adjusted returns of active versus passive South African general equity unit trusts during varying economic periods: an individual investor's perspective
- Authors: Ferreira, James Stuart
- Date: 2015
- Subjects: Mutual funds , Global Financial Crisis, 2008-2009 , Risk assessment , Financial crises -- South Africa , Portfolio management , Financial planners
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1207 , http://hdl.handle.net/10962/d1019753
- Description: This thesis used the events of the 2007 financial crisis as a means of being able to add to the research already done on South African unit trusts. The objective was to study the risk-adjusted performance of South African general equity unit trusts against the market during the period between 2005 and 2014. This period took into account the bull market preceding the financial crisis, the market crash of 2007 and the subsequent market recovery that followed. Data was obtained online through the I-Net BFA data base and included 161 general equity unit trusts that contained a full data set. In addition to the general equity unit trusts, the Satrix40 was studied to compare a passive unit trust against those that are actively managed. The 10 year Government bond was also used as a risk-free rate to add to the comparisons of performance results. The Sharpe, Treynor and Jensen measures were applied to the data with the results adding more support to the opinions that markets are fairly efficient and active investment strategies are being challenged by consistently well performing passive investments. Throughout the duration of the study, taking into account the varying economic cycles, the Satrix40 passive investment showed the best average overall return on simple return calculations as well as during the risk-adjusted measurements. In support of active investment management, unit trusts showed their best relative performance figures during the period of the financial crisis. This suggested that active financial managers were able to make the active calls necessary to weather the storm of the financial crisis. While the study did have its limitations, the results it produced are intended to offer investors further knowledge in enabling them to make more educated investment decisions in the future.
- Full Text:
- Date Issued: 2015
- Authors: Ferreira, James Stuart
- Date: 2015
- Subjects: Mutual funds , Global Financial Crisis, 2008-2009 , Risk assessment , Financial crises -- South Africa , Portfolio management , Financial planners
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1207 , http://hdl.handle.net/10962/d1019753
- Description: This thesis used the events of the 2007 financial crisis as a means of being able to add to the research already done on South African unit trusts. The objective was to study the risk-adjusted performance of South African general equity unit trusts against the market during the period between 2005 and 2014. This period took into account the bull market preceding the financial crisis, the market crash of 2007 and the subsequent market recovery that followed. Data was obtained online through the I-Net BFA data base and included 161 general equity unit trusts that contained a full data set. In addition to the general equity unit trusts, the Satrix40 was studied to compare a passive unit trust against those that are actively managed. The 10 year Government bond was also used as a risk-free rate to add to the comparisons of performance results. The Sharpe, Treynor and Jensen measures were applied to the data with the results adding more support to the opinions that markets are fairly efficient and active investment strategies are being challenged by consistently well performing passive investments. Throughout the duration of the study, taking into account the varying economic cycles, the Satrix40 passive investment showed the best average overall return on simple return calculations as well as during the risk-adjusted measurements. In support of active investment management, unit trusts showed their best relative performance figures during the period of the financial crisis. This suggested that active financial managers were able to make the active calls necessary to weather the storm of the financial crisis. While the study did have its limitations, the results it produced are intended to offer investors further knowledge in enabling them to make more educated investment decisions in the future.
- Full Text:
- Date Issued: 2015
Research and development of an intelligent AGV-based material handling system for industrial applications
- Authors: Ferreira, Tremaine Pierre
- Date: 2015
- Subjects: Robotics -- Industrial applications Artificial intelligence , Mechatronics -- South Africa
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/21711 , vital:29738
- Description: The use of autonomous robots in industrial applications is growing in popularity and possesses the following advantages: cost effectiveness, job efficiency and safety aspects. Despite the advantages, the major drawback to using autonomous robots is the cost involved to acquire such robots. It is the aim of GMSA to develop a low cost AGV capable of performing material handling in an industrial environment. Collective autonomous robots are often used to perform tasks, that is, more than one working together to achieve a common goal. The intelligent controller, responsible for establishing coordination between the individual robots, plays a key role in managing the tasks of each robot to achieve the common goal. This dissertation addresses the development of an AGV capable of such functionality. Key research areas include: the development of an autonomous coupling system, integration of key safety devices and the development of an intelligent control strategy that can be used to govern the operation of multiple AGVs in an area.
- Full Text:
- Date Issued: 2015
- Authors: Ferreira, Tremaine Pierre
- Date: 2015
- Subjects: Robotics -- Industrial applications Artificial intelligence , Mechatronics -- South Africa
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/21711 , vital:29738
- Description: The use of autonomous robots in industrial applications is growing in popularity and possesses the following advantages: cost effectiveness, job efficiency and safety aspects. Despite the advantages, the major drawback to using autonomous robots is the cost involved to acquire such robots. It is the aim of GMSA to develop a low cost AGV capable of performing material handling in an industrial environment. Collective autonomous robots are often used to perform tasks, that is, more than one working together to achieve a common goal. The intelligent controller, responsible for establishing coordination between the individual robots, plays a key role in managing the tasks of each robot to achieve the common goal. This dissertation addresses the development of an AGV capable of such functionality. Key research areas include: the development of an autonomous coupling system, integration of key safety devices and the development of an intelligent control strategy that can be used to govern the operation of multiple AGVs in an area.
- Full Text:
- Date Issued: 2015
An interevention strategy for improving reading comprehension in grade 9: a case study in one secondary school in East london education district
- Authors: Fesi, Liziwe
- Date: 2015
- Subjects: English language -- Study and teaching -- South Africa -- Eastern Cape Reading comprehension -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5905 , vital:29417
- Description: The study focused on strategies for improving reading comprehension skills at Grade 9 level through story writing in one secondary school in the East London Education District. Vygotskian theory formed the theoretical framework for this study, aligned with language theories as relevant literature for this particular research study. Data was generated from 15 Grade 9 learners who were selected from 3 Grade 9 classes using convenience sampling, comprising of five learners from Grade 9(a) intervention group, five learners from Grade 9(b) and five learners from Grade 9(c) non-intervention group who were selected for this study with the inclusion of two Grade 9 teachers and one Grade 8 teacher. Involvement of the grade 8 teacher is relevant to determine the voice from a Grade 8 teacher as an informed voice, which filtered into understanding how and why Grade 9 learners are unable to read and write with understanding in their present grade. The teachers were given three questions for semi-structured interviews. All the learners were given a specific activity as a pre-assessment without intervention strategy. The Grade 9(a), which is the intervention class, used story writing as an intervention strategy where they began a two week study using intensive intervention strategies, amounting to a total of 18 weeks study from pre-assessment to post-assessment. At the conclusion of the study the selected learners undertook a post-assessment using the same specific activity as in the pre-assessment. Subsequently, these selected Grade 9 learners’ reading comprehension pre-assessment and post-assessment was analysed. Five of the grade 9(a) learners demonstrated significant improvement in the intervention activities they were given. Grade 9(b) and Grade 9(c) showed difficulty in the post-assessment as they were the non-intervention group. It was concluded that Grade 9(a) learners performed better in the post-assessment. This could be attributed to the use of story writing as an intervention strategy to improve their English reading and reading comprehension skills. Keywords: intervention, reading, comprehension.
- Full Text:
- Date Issued: 2015
- Authors: Fesi, Liziwe
- Date: 2015
- Subjects: English language -- Study and teaching -- South Africa -- Eastern Cape Reading comprehension -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5905 , vital:29417
- Description: The study focused on strategies for improving reading comprehension skills at Grade 9 level through story writing in one secondary school in the East London Education District. Vygotskian theory formed the theoretical framework for this study, aligned with language theories as relevant literature for this particular research study. Data was generated from 15 Grade 9 learners who were selected from 3 Grade 9 classes using convenience sampling, comprising of five learners from Grade 9(a) intervention group, five learners from Grade 9(b) and five learners from Grade 9(c) non-intervention group who were selected for this study with the inclusion of two Grade 9 teachers and one Grade 8 teacher. Involvement of the grade 8 teacher is relevant to determine the voice from a Grade 8 teacher as an informed voice, which filtered into understanding how and why Grade 9 learners are unable to read and write with understanding in their present grade. The teachers were given three questions for semi-structured interviews. All the learners were given a specific activity as a pre-assessment without intervention strategy. The Grade 9(a), which is the intervention class, used story writing as an intervention strategy where they began a two week study using intensive intervention strategies, amounting to a total of 18 weeks study from pre-assessment to post-assessment. At the conclusion of the study the selected learners undertook a post-assessment using the same specific activity as in the pre-assessment. Subsequently, these selected Grade 9 learners’ reading comprehension pre-assessment and post-assessment was analysed. Five of the grade 9(a) learners demonstrated significant improvement in the intervention activities they were given. Grade 9(b) and Grade 9(c) showed difficulty in the post-assessment as they were the non-intervention group. It was concluded that Grade 9(a) learners performed better in the post-assessment. This could be attributed to the use of story writing as an intervention strategy to improve their English reading and reading comprehension skills. Keywords: intervention, reading, comprehension.
- Full Text:
- Date Issued: 2015
An analysis of the representation of sexual abuse in selected post-apartheid novels
- Authors: Fetile, Khanyisa
- Date: 2015
- Subjects: South African fiction (English) -- 21st century , Sexual abuse victims in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/3822 , vital:20466
- Description: This study examines the way in which three South African novelists, K. Sello Duiker, Phaswane Mpe and Sindiwe Magona portray the sexual abuse of men and women in the post-apartheid era. The novels under discussion are: Thirteen Cents (2000) and The Quiet Violence of Dreams (2001) by K.Sello Duiker, Beauty’s Gift (2008) by Sindiwe Magona and Phaswane Mpe`s Welcome to Our Hillbrow. It will also look at the characters and the events to show that sexual abuse can be physical, traumatic and emotional, and that it affects both males and females, reinforcing in a sense Pucherova`s assertion that “both men and women are oppressed by a patriarchal heterosexist society” (2009:937).
- Full Text:
- Date Issued: 2015
- Authors: Fetile, Khanyisa
- Date: 2015
- Subjects: South African fiction (English) -- 21st century , Sexual abuse victims in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/3822 , vital:20466
- Description: This study examines the way in which three South African novelists, K. Sello Duiker, Phaswane Mpe and Sindiwe Magona portray the sexual abuse of men and women in the post-apartheid era. The novels under discussion are: Thirteen Cents (2000) and The Quiet Violence of Dreams (2001) by K.Sello Duiker, Beauty’s Gift (2008) by Sindiwe Magona and Phaswane Mpe`s Welcome to Our Hillbrow. It will also look at the characters and the events to show that sexual abuse can be physical, traumatic and emotional, and that it affects both males and females, reinforcing in a sense Pucherova`s assertion that “both men and women are oppressed by a patriarchal heterosexist society” (2009:937).
- Full Text:
- Date Issued: 2015
An assessment of the in vitro neuroprotective potential of selected Algerian and South African medicinal plant extracts
- Authors: Fewell, William
- Date: 2015
- Subjects: Medicinal plants -- South Africa , Nervous system -- Alternative treatment -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/8608 , vital:26411
- Description: It is estimated by the World Health Organization (WHO) that by 2040 neurodegenerative disorders will collectively surpass cancer as the primary cause of death in industrialised countries (WHO,2006). Natural flora represents one of the most important therapeutic sources in modern drug discovery, however only a limited number of plant species have been screened for their neuroprotective value. The neuroprotective potential of eleven Algerian and two South African medicinal plant extracts were assessed in this study, aiming to identify promising candidates for future research. Neurodegenerative disorders such as Parkinson’s disease are characterised by distinct biochemical features, including protein misfolding/-aggregation, excessive oxidative stress and apoptotic cell death. As such, medicinal plant extracts were screened for biological properties directly relevant to neurodegeneration. The capacity to induce autophagy was also investigated as mounting evidence suggests that activation of this pathway may reduce abnormal protein aggregation and promote neuronal survival.
- Full Text: false
- Date Issued: 2015
- Authors: Fewell, William
- Date: 2015
- Subjects: Medicinal plants -- South Africa , Nervous system -- Alternative treatment -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/8608 , vital:26411
- Description: It is estimated by the World Health Organization (WHO) that by 2040 neurodegenerative disorders will collectively surpass cancer as the primary cause of death in industrialised countries (WHO,2006). Natural flora represents one of the most important therapeutic sources in modern drug discovery, however only a limited number of plant species have been screened for their neuroprotective value. The neuroprotective potential of eleven Algerian and two South African medicinal plant extracts were assessed in this study, aiming to identify promising candidates for future research. Neurodegenerative disorders such as Parkinson’s disease are characterised by distinct biochemical features, including protein misfolding/-aggregation, excessive oxidative stress and apoptotic cell death. As such, medicinal plant extracts were screened for biological properties directly relevant to neurodegeneration. The capacity to induce autophagy was also investigated as mounting evidence suggests that activation of this pathway may reduce abnormal protein aggregation and promote neuronal survival.
- Full Text: false
- Date Issued: 2015
The associative behaviour of silky sharks, Carcharhinus falciformis, with floating objects in the open ocean
- Authors: Filmalter, John David
- Date: 2015
- Subjects: Silky shark , Silky shark -- Behavior , Silky shark -- Marking , Silky shark -- Food , Tuna fisheries -- Bycatches , Fish aggregation devices , Underwater acoustic telemetry , Fish tagging
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5381 , http://hdl.handle.net/10962/d1018177
- Description: The silky shark Carcharhinus falciformis forms the primary elasmobranch bycatch in tuna purse seine fisheries using fish aggregating devices (FADs) in all of the world’s tropical oceans. Its life-history traits of slow growth, late maturation and low fecundity make it vulnerable to over exploitation, as is apparent from historical bycatch trends. Very little is known about the associative behaviour of this species with floating objects, information which is essential in formulating effective mitigation and management measures. This study aims to address this knowledge gap through the use of various electronic tagging techniques in conjunction with dietary analysis. Dietary data were collected from 323 silky sharks incidentally caught at FADs. Approximately 40 percent of the diet consisted of prey associated with FADs while the remaining 60 percent were non-associated species of crustaceans, cephalopods and fishes. These results suggest that the associative behaviour is not primarily driven by trophic enhancement, but is likely a combination of predator avoidance, social interactions and feeding. Fine-scale behavioural data from silky sharks associated with drifting FADs were collected through the use of acoustic telemetry techniques. Acoustic tags were implanted into 38 silky sharks (69- 116 cm TL) at eight FADs. FADs were equipped with satellite linked acoustic receivers and abandoned to drift freely. Presence/absence and swimming depth data were telemetered via the Iridium satellite system. A total of 300 d of behavioural data were collected from 20 tagged individuals. Individuals remain associated with the same FAD for extended periods (min = 2.84 d, max = 30.60 d, mean = 15.69 d). Strong diel patterns were observed in both association and swimming depth. Typically individuals moved away from FADs after sunset and return later during the night, then remain closely associated until the following evening. Vertical behaviour also changed around sunset with sharks using fairly constant depths, within the upper 25 m, during the day and switching to rapid vertical movements during the night, with dives in excess of 250 m recoded. Broader scale movement behaviour was investigated using pop-up archival satellite tags (PSATs). Tags were deployed on 46 silky sharks (86-224.5 cm TL) for a total of 1495 d. Light data were used to calculate geolocation estimates and reconstruct the sharks’ trajectories. Movement patterns differed between animals and according to deployment duration. Several extensive horizontal movements were observed, with an average track length of 3240 km during an average tag deployment of 44.02 d. Horizontal movement patterns were found to correlate very closely with drift patterns of FADs. Consequently, it appears that the movement behaviour of juvenile silky sharks is strongly influenced by the movement of drifting FADs in this region. Ghost fishing of silky sharks through entanglement in FADs was also investigated using data derived from PSATs as well as underwater visual censuses. Thirteen per cent of the tagged sharks became entangled in FADs and entangled sharks were observed in 35 percent of the 51 FADs surveyed. Using this information in conjunction with estimated time that sharks remained entangled in the FAD (from depth data from PSATs), and scaling up according to estimates of FAD numbers, it was found that between 480 000 and 960 000 silky sharks are killed annually in this manner in the Indian Ocean. Subsequent management measures in this region prevent the deployment of FADs with netting that could lead to entanglement. Overall, floating objects appear to play a significant role in the juvenile life stages of silky sharks in this region. While their association with floating objects is clearly advantageous in an evolutionary sense, under current tuna fishery trends, this behaviour is certainly detrimental for the population.
- Full Text:
- Date Issued: 2015
- Authors: Filmalter, John David
- Date: 2015
- Subjects: Silky shark , Silky shark -- Behavior , Silky shark -- Marking , Silky shark -- Food , Tuna fisheries -- Bycatches , Fish aggregation devices , Underwater acoustic telemetry , Fish tagging
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5381 , http://hdl.handle.net/10962/d1018177
- Description: The silky shark Carcharhinus falciformis forms the primary elasmobranch bycatch in tuna purse seine fisheries using fish aggregating devices (FADs) in all of the world’s tropical oceans. Its life-history traits of slow growth, late maturation and low fecundity make it vulnerable to over exploitation, as is apparent from historical bycatch trends. Very little is known about the associative behaviour of this species with floating objects, information which is essential in formulating effective mitigation and management measures. This study aims to address this knowledge gap through the use of various electronic tagging techniques in conjunction with dietary analysis. Dietary data were collected from 323 silky sharks incidentally caught at FADs. Approximately 40 percent of the diet consisted of prey associated with FADs while the remaining 60 percent were non-associated species of crustaceans, cephalopods and fishes. These results suggest that the associative behaviour is not primarily driven by trophic enhancement, but is likely a combination of predator avoidance, social interactions and feeding. Fine-scale behavioural data from silky sharks associated with drifting FADs were collected through the use of acoustic telemetry techniques. Acoustic tags were implanted into 38 silky sharks (69- 116 cm TL) at eight FADs. FADs were equipped with satellite linked acoustic receivers and abandoned to drift freely. Presence/absence and swimming depth data were telemetered via the Iridium satellite system. A total of 300 d of behavioural data were collected from 20 tagged individuals. Individuals remain associated with the same FAD for extended periods (min = 2.84 d, max = 30.60 d, mean = 15.69 d). Strong diel patterns were observed in both association and swimming depth. Typically individuals moved away from FADs after sunset and return later during the night, then remain closely associated until the following evening. Vertical behaviour also changed around sunset with sharks using fairly constant depths, within the upper 25 m, during the day and switching to rapid vertical movements during the night, with dives in excess of 250 m recoded. Broader scale movement behaviour was investigated using pop-up archival satellite tags (PSATs). Tags were deployed on 46 silky sharks (86-224.5 cm TL) for a total of 1495 d. Light data were used to calculate geolocation estimates and reconstruct the sharks’ trajectories. Movement patterns differed between animals and according to deployment duration. Several extensive horizontal movements were observed, with an average track length of 3240 km during an average tag deployment of 44.02 d. Horizontal movement patterns were found to correlate very closely with drift patterns of FADs. Consequently, it appears that the movement behaviour of juvenile silky sharks is strongly influenced by the movement of drifting FADs in this region. Ghost fishing of silky sharks through entanglement in FADs was also investigated using data derived from PSATs as well as underwater visual censuses. Thirteen per cent of the tagged sharks became entangled in FADs and entangled sharks were observed in 35 percent of the 51 FADs surveyed. Using this information in conjunction with estimated time that sharks remained entangled in the FAD (from depth data from PSATs), and scaling up according to estimates of FAD numbers, it was found that between 480 000 and 960 000 silky sharks are killed annually in this manner in the Indian Ocean. Subsequent management measures in this region prevent the deployment of FADs with netting that could lead to entanglement. Overall, floating objects appear to play a significant role in the juvenile life stages of silky sharks in this region. While their association with floating objects is clearly advantageous in an evolutionary sense, under current tuna fishery trends, this behaviour is certainly detrimental for the population.
- Full Text:
- Date Issued: 2015
Counsellors’ talk about their understanding of, and practices in response to, intimate partner violence during pregnancy: a narrative-discursive analytic study.
- Authors: Fleischack, Anne
- Date: 2015
- Subjects: Intimate partner violence -- South Africa , Intimate partner violence -- Psychological aspects , Abused women -- Counseling of , Pregnant women -- South Africa -- Abuse of , Pregnant women -- Counseling of
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3255 , http://hdl.handle.net/10962/d1016391
- Description: South Africa is a very violent society, where violence is often used as a social resource to maintain control and establish authority. Global and local research suggests that there is a high prevalence of intimate partner violence (IPV), a facet of this violence, although little research has been conducted into the effects of IPV during pregnancy in the South African non-governmental organisation (NGO) context. NGOs globally and in South Africa have attempted to address IPV and IPV during pregnancy by providing services that aim to assist (largely female) clients emotionally and logistically. In light of this phenomenon, this qualitative study presents data generated through the use of a lightly-structured narrative interview schedule. The interviews were conducted over three sessions with eight counsellors, all based at two NGOs in South Africa and experienced in counselling women who have suffered IPV and IPV during pregnancy. This study used Taylor and Littleton’s (2006) narrative-discursive analytical lens, infused with theoretical insights from Foucault about power, discourse and narrative in order to identify the discursive resources that shape the narratives that the counsellors shared in the interviews and how these translate into subject positions and (gendered) power relations of the men and women about whom they speak. Six discursive resources emerged from the narratives, namely a discourse of ‘traditional “African” culture’, ‘patriarchal masculinity’, ‘nurturing femininity’, ‘female victimhood’, ‘female survivorhood’ and ‘human rights’. These informed the three main narratives that emerged: narratives about IPV in general, IPV during pregnancy, and the counsellors’ narratives about their intervention strategies. Within these narratives (and the micro-narratives which comprised them), men were largely positioned as subscribing to violent patriarchal behaviour whilst women were mostly positioned as nurturing and victims of this violence. The counsellors also constructed women as largely ignorant of their options about IPV and IPV during pregnancy; they constructed these phenomena as problems that require intervention and identified a number of factors that indicate what successful IPV interventions should entail. In reflecting upon this analysis, this study also aimed to address the questions of what is achieved or gained by using these narratives and discursive resources, what the significance or consequences are of constructing and using these particular narratives and discourses and whether different narratives or discourses would have been possible. Recommendations for further research includes incorporating more sites as well as interviewing perpetrators and IPV survivors themselves, perhaps in their home language where relevant rather than English, to gain a broader and more faceted understanding of the dynamics surrounding IPV during pregnancy. A recommendation for practice in intervention against IPV during pregnancy is to introduce more holistic/systemic intervention strategies and working with communities to address this issue.
- Full Text:
- Date Issued: 2015
- Authors: Fleischack, Anne
- Date: 2015
- Subjects: Intimate partner violence -- South Africa , Intimate partner violence -- Psychological aspects , Abused women -- Counseling of , Pregnant women -- South Africa -- Abuse of , Pregnant women -- Counseling of
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3255 , http://hdl.handle.net/10962/d1016391
- Description: South Africa is a very violent society, where violence is often used as a social resource to maintain control and establish authority. Global and local research suggests that there is a high prevalence of intimate partner violence (IPV), a facet of this violence, although little research has been conducted into the effects of IPV during pregnancy in the South African non-governmental organisation (NGO) context. NGOs globally and in South Africa have attempted to address IPV and IPV during pregnancy by providing services that aim to assist (largely female) clients emotionally and logistically. In light of this phenomenon, this qualitative study presents data generated through the use of a lightly-structured narrative interview schedule. The interviews were conducted over three sessions with eight counsellors, all based at two NGOs in South Africa and experienced in counselling women who have suffered IPV and IPV during pregnancy. This study used Taylor and Littleton’s (2006) narrative-discursive analytical lens, infused with theoretical insights from Foucault about power, discourse and narrative in order to identify the discursive resources that shape the narratives that the counsellors shared in the interviews and how these translate into subject positions and (gendered) power relations of the men and women about whom they speak. Six discursive resources emerged from the narratives, namely a discourse of ‘traditional “African” culture’, ‘patriarchal masculinity’, ‘nurturing femininity’, ‘female victimhood’, ‘female survivorhood’ and ‘human rights’. These informed the three main narratives that emerged: narratives about IPV in general, IPV during pregnancy, and the counsellors’ narratives about their intervention strategies. Within these narratives (and the micro-narratives which comprised them), men were largely positioned as subscribing to violent patriarchal behaviour whilst women were mostly positioned as nurturing and victims of this violence. The counsellors also constructed women as largely ignorant of their options about IPV and IPV during pregnancy; they constructed these phenomena as problems that require intervention and identified a number of factors that indicate what successful IPV interventions should entail. In reflecting upon this analysis, this study also aimed to address the questions of what is achieved or gained by using these narratives and discursive resources, what the significance or consequences are of constructing and using these particular narratives and discourses and whether different narratives or discourses would have been possible. Recommendations for further research includes incorporating more sites as well as interviewing perpetrators and IPV survivors themselves, perhaps in their home language where relevant rather than English, to gain a broader and more faceted understanding of the dynamics surrounding IPV during pregnancy. A recommendation for practice in intervention against IPV during pregnancy is to introduce more holistic/systemic intervention strategies and working with communities to address this issue.
- Full Text:
- Date Issued: 2015