Boundary demarcation and community identity concerns: an investigation of the Matatiele boundary dispute
- Authors: Tyabazayo, Phumlani
- Date: 2013
- Subjects: Conflict management -- South Africa -- Matatiele , Identity politics -- South Africa -- Matatiele , Matatiele (South Africa) -- Boundaries
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:8357 , http://hdl.handle.net/10948/d1021019
- Description: This treatise explores the Matatiele boundary demarcation dispute and, in particular, the role that unmet basic human needs play in this dispute. The subject of identity is also explored. In 2006, the government of South Africa decided that Matatiele should no longer be part of the province of Kwa-Zulu Natal (KZN) and instead should be incorporated into the province of the Eastern Cape. This decision divided the community of Matatiele into two groups; one was pro-KZN and the other, pro-Eastern Cape. In 2008, violence broke out between these two groups. The government’s decision and the resulting violence have created a situation of protracted conflict in the community of Matatiele with rivalries and antagonism being part of the fabric of the society. This treatise attempts to analyse this conflict and link it to the theory of basic human needs as advocated by conflict theorists such as John Burton and Johan Gultang. Human needs theorists hold the view that unmet psychological and physical needs are sources of social conflict and can lead to protracted conflict. This treatise also explores the efficacy of problem-solving workshops and referendums as conflict-resolution techniques for boundary demarcation disputes. The data were collected from unstructured, in-depth interviews with a sample of eleven respondents. The data indicate that there is a nexus between this conflict and the theory of basic human needs and that community-identity concerns are central to this dispute. The findings of this study suggest that the conflict is multi-faceted and that the underlying causes can be attributed to unmet human needs. The data was analysed using the grounded theory approach. This allowed the key causes of the conflict to be identified and subsequently informed the recommendations presented in the conclusion of this treatise.
- Full Text:
- Date Issued: 2013
- Authors: Tyabazayo, Phumlani
- Date: 2013
- Subjects: Conflict management -- South Africa -- Matatiele , Identity politics -- South Africa -- Matatiele , Matatiele (South Africa) -- Boundaries
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:8357 , http://hdl.handle.net/10948/d1021019
- Description: This treatise explores the Matatiele boundary demarcation dispute and, in particular, the role that unmet basic human needs play in this dispute. The subject of identity is also explored. In 2006, the government of South Africa decided that Matatiele should no longer be part of the province of Kwa-Zulu Natal (KZN) and instead should be incorporated into the province of the Eastern Cape. This decision divided the community of Matatiele into two groups; one was pro-KZN and the other, pro-Eastern Cape. In 2008, violence broke out between these two groups. The government’s decision and the resulting violence have created a situation of protracted conflict in the community of Matatiele with rivalries and antagonism being part of the fabric of the society. This treatise attempts to analyse this conflict and link it to the theory of basic human needs as advocated by conflict theorists such as John Burton and Johan Gultang. Human needs theorists hold the view that unmet psychological and physical needs are sources of social conflict and can lead to protracted conflict. This treatise also explores the efficacy of problem-solving workshops and referendums as conflict-resolution techniques for boundary demarcation disputes. The data were collected from unstructured, in-depth interviews with a sample of eleven respondents. The data indicate that there is a nexus between this conflict and the theory of basic human needs and that community-identity concerns are central to this dispute. The findings of this study suggest that the conflict is multi-faceted and that the underlying causes can be attributed to unmet human needs. The data was analysed using the grounded theory approach. This allowed the key causes of the conflict to be identified and subsequently informed the recommendations presented in the conclusion of this treatise.
- Full Text:
- Date Issued: 2013
Community development projects in Ingquza Hill and its impact on poverty alleviation
- Authors: Tyali, Zukiswa
- Date: 2013
- Subjects: Community development -- South Africa -- Eastern Cape , Rural development projects -- South Africa -- Eastern Cape , Economic assistance -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9190 , http://hdl.handle.net/10948/d1020311
- Description: The fight against poverty is one of South African government priorities and challenges. Despite the large amounts of funds donated by government to poverty alleviation in South Africa almost half of the population still continue to live below the poverty line. There have been many government interventions towards projects. These projects are established in an effort to reduce poverty. However, most of these projects have had a minimal impact on the poverty level of the country. In this study, the researcher illustrated the impact of community development projects on poverty alleviation in Lubala village in Ingquza Hill Local municipality. The research methodology for the study is descriptive, sourced from available literature.
- Full Text:
- Date Issued: 2013
- Authors: Tyali, Zukiswa
- Date: 2013
- Subjects: Community development -- South Africa -- Eastern Cape , Rural development projects -- South Africa -- Eastern Cape , Economic assistance -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9190 , http://hdl.handle.net/10948/d1020311
- Description: The fight against poverty is one of South African government priorities and challenges. Despite the large amounts of funds donated by government to poverty alleviation in South Africa almost half of the population still continue to live below the poverty line. There have been many government interventions towards projects. These projects are established in an effort to reduce poverty. However, most of these projects have had a minimal impact on the poverty level of the country. In this study, the researcher illustrated the impact of community development projects on poverty alleviation in Lubala village in Ingquza Hill Local municipality. The research methodology for the study is descriptive, sourced from available literature.
- Full Text:
- Date Issued: 2013
Nelson Mandela Metropolitan University students' perceptions of television advertisements for four SAB beer brands
- Authors: Tye, Robyn
- Date: 2013
- Subjects: Advertising -- Brewing industry , Advertising -- Alcoholic beverages , Television advertising -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8439 , http://hdl.handle.net/10948/d1021122
- Description: This research study aimed to provide the South African beer industry and their advertising representative with insights into 18-28-year-olds’ perceptions of the communicated messaged in beer advertisements. This included the use of social and cultural references to attract their attention and the suggestions made by the advertisements about the consumption of beer in certain contexts. This research study aimed to determine the selected sample’s (NMMU students) perceptions of four South African Breweries beer brands, namely Castle Lager, Castle Lite, Carling Black Label and Hansa Pilsener, in terms of their use of references to social and cultural identity of males and females in South Africa within their television advertisements. The survey questionnaire helped determine what the selected sample’s perceptions were of each advertisement, and whether they fully understood the desired communicated message. It also helped to understand whether each advertisement captured their attention. A semiotic analysis of each advertisement was conducted to deconstruct the advertisements and to determine if they do contain elements of social and cultural identity in an attempt to sell products to their target audiences, or to affect the perceptions of the brand and drinking beer in general. This was achieved by examining the signs and imagery in each advertisement, looking specifically at the representamen, interpretant and object using Pierce’s model of a sign. , Hierdie navorsingstudie is daarop gemik om die Suid-Afrikaanse bierbedryf en sy adverteerders ‘n beter begrip te gee van verbruikers tussen die ouderdomme van 18-28, se waarnemings van die boodskappe in bieradvertensies. Dit sluit in die gebruik van sosiale en kulturele verwysings, wat veronderstel is om die verbruikers se aandag te trek, asook die suggesties wat deur die advertensies gemaak word met betrekking tot die verbruik van bier in ‘n bepaalde konteks. Die studie moes ook die gekose monster (“selected sample”), nl. die NMMU-student se persepsies bepaal van vier handelsname van die South African Breweries, naamlik Castle Lager, Castle Lite, Carling Black Label en Hansa Pilsener, en in watter mate daar in bieradvertensies oor die televisie verwys word na die sosiale en kulturele identiteit van Suid-Afrikaanse mans en vroue. Die meningspeiling het die groep se waarnemings van elke advertensie, asook of die boodskap wat gekommunikeer is ten volle verstaan word, ondersoek. Die vraelys kon ook vasstel of die advertensies hulle aandag getrek het. ‘n Semiotiese ontleding van elke advertensie is gedoen, om die advertensies te dekodeer en sodoende vas te stel of die adverteerders elemente van sosiale en kulturele identiteit gebruik het om hul produkte aan die teikenmarkte te verkoop, of om die idees rondom die handelsnaam en bier oor die algemeen te beïnvloed. Aan die hand van Peirce se semiotiese model is die tekens en beelde in elke advertensie bestudeer.
- Full Text:
- Date Issued: 2013
- Authors: Tye, Robyn
- Date: 2013
- Subjects: Advertising -- Brewing industry , Advertising -- Alcoholic beverages , Television advertising -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8439 , http://hdl.handle.net/10948/d1021122
- Description: This research study aimed to provide the South African beer industry and their advertising representative with insights into 18-28-year-olds’ perceptions of the communicated messaged in beer advertisements. This included the use of social and cultural references to attract their attention and the suggestions made by the advertisements about the consumption of beer in certain contexts. This research study aimed to determine the selected sample’s (NMMU students) perceptions of four South African Breweries beer brands, namely Castle Lager, Castle Lite, Carling Black Label and Hansa Pilsener, in terms of their use of references to social and cultural identity of males and females in South Africa within their television advertisements. The survey questionnaire helped determine what the selected sample’s perceptions were of each advertisement, and whether they fully understood the desired communicated message. It also helped to understand whether each advertisement captured their attention. A semiotic analysis of each advertisement was conducted to deconstruct the advertisements and to determine if they do contain elements of social and cultural identity in an attempt to sell products to their target audiences, or to affect the perceptions of the brand and drinking beer in general. This was achieved by examining the signs and imagery in each advertisement, looking specifically at the representamen, interpretant and object using Pierce’s model of a sign. , Hierdie navorsingstudie is daarop gemik om die Suid-Afrikaanse bierbedryf en sy adverteerders ‘n beter begrip te gee van verbruikers tussen die ouderdomme van 18-28, se waarnemings van die boodskappe in bieradvertensies. Dit sluit in die gebruik van sosiale en kulturele verwysings, wat veronderstel is om die verbruikers se aandag te trek, asook die suggesties wat deur die advertensies gemaak word met betrekking tot die verbruik van bier in ‘n bepaalde konteks. Die studie moes ook die gekose monster (“selected sample”), nl. die NMMU-student se persepsies bepaal van vier handelsname van die South African Breweries, naamlik Castle Lager, Castle Lite, Carling Black Label en Hansa Pilsener, en in watter mate daar in bieradvertensies oor die televisie verwys word na die sosiale en kulturele identiteit van Suid-Afrikaanse mans en vroue. Die meningspeiling het die groep se waarnemings van elke advertensie, asook of die boodskap wat gekommunikeer is ten volle verstaan word, ondersoek. Die vraelys kon ook vasstel of die advertensies hulle aandag getrek het. ‘n Semiotiese ontleding van elke advertensie is gedoen, om die advertensies te dekodeer en sodoende vas te stel of die adverteerders elemente van sosiale en kulturele identiteit gebruik het om hul produkte aan die teikenmarkte te verkoop, of om die idees rondom die handelsnaam en bier oor die algemeen te beïnvloed. Aan die hand van Peirce se semiotiese model is die tekens en beelde in elke advertensie bestudeer.
- Full Text:
- Date Issued: 2013
Nelson Mandela Metropolitan University students' perceptions of television advertisements for four SAB beer brands
- Authors: Tye, Robyn
- Date: 2013
- Subjects: Television advertising -- South Africa -- Eastern Cape , Television -- Social aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8426 , http://hdl.handle.net/10948/d1020040
- Description: South Africa's turbulant political and social history has meant that alchol consumption was a way for many to escape from the harsh realities in which people lived. Inder aparthied, prohibition laws dominated the drinking habits of many South Africans. the 1928 prohibition act, which was established to prevent the sale of European beer to Africans, effectively boosted the illicit black drinking culture in shebeens and socially in the townships. As people began to move from rural to urban areas in search of job; commual beer halls became places of connection and support for people who felt alienated and disconnected from their homes and famillies.
- Full Text:
- Date Issued: 2013
- Authors: Tye, Robyn
- Date: 2013
- Subjects: Television advertising -- South Africa -- Eastern Cape , Television -- Social aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8426 , http://hdl.handle.net/10948/d1020040
- Description: South Africa's turbulant political and social history has meant that alchol consumption was a way for many to escape from the harsh realities in which people lived. Inder aparthied, prohibition laws dominated the drinking habits of many South Africans. the 1928 prohibition act, which was established to prevent the sale of European beer to Africans, effectively boosted the illicit black drinking culture in shebeens and socially in the townships. As people began to move from rural to urban areas in search of job; commual beer halls became places of connection and support for people who felt alienated and disconnected from their homes and famillies.
- Full Text:
- Date Issued: 2013
Characterization of bioflocculants produced by consortia of three marine bacteria belonging to the genera bacillus and cobetia previously isolated from the bottom sediment of Algoa Bay in the Eastern Cape Province of South Africa
- Ugbenyen, Anthony Moses https://orcid.org/0000-0002-1381-3428
- Authors: Ugbenyen, Anthony Moses https://orcid.org/0000-0002-1381-3428
- Date: 2013
- Subjects: Water -- Purification -- Flocculation , Water quality management , Flocculation
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24454 , vital:62804
- Description: The bioflocculant-producing potentials of three marine bacteria isolated from the sediment samples of Algoa Bay in the Eastern Cape Province of South Africa were assessed. Analysis of the partial nucleotide sequence of the 16S rDNA of the bacteria revealed 99 percent, 99 percent, and 98 percent similarity to Cobetia sp. L222, Bacillus sp. A-5A, and Bacillus sp. HXG-C1 respectively and the sequence was deposited in GenBank as Cobetia sp. OAUIFE, Bacillus sp. MAYA and Bacillus sp. Gilbert (accession number JF799092, JF799093, and HQ537128 respectively). Cultivation condition studies for Cobetia sp. OAUIFE revealed that bioflocculant production was optimal with an inoculum size of 2 percent (v/v), initial pH of 6.0, Mn2+ as the metal ion, and glucose as the carbon source. Metal ions, including Na+, K+, Li+, Ca2+and Mg2+ stimulated bioflocculant production resulting in flocculating activity of above 90 percent. This crude bioflocculant is thermally stable, with about 78 percent of its flocculating activity remaining after heating at 100 oC for 25 min. Analysis of the purified bioflocculant revealed it to be an acidic extracellular polysaccharide. FTIR analysis revealed the presence of methoxyl, hydroxyl, and carboxyl - groups in the compound bioflocculant and SEM micrograph of the bioflocculant revealed a crystal-linear structure. On the other hand, bioflocculant production by Bacillus sp. MAYA was optimal when glucose (95.6 percent flocculating activity) and ammonium nitrate (83.3 percent flocculating activity) were used as carbon and nitrogen sources respectively; inoculum size was 2 percent (v/v); initial pH 6; and Ca2+ as coagulant aid. Chemical analysis of the purified bioflocculant shows that it is composed of uronic acid, neutral sugar and protein. FTIR analysis also revealed the presence of methoxyl, hydroxyl, carboxyl and amino- groups in this bioflocculant. The bioflocculant is thermostable with about 65.6 percent residual flocculating activity retained after heating the bioflocculant at 100 oC for 25 min. However bioflocculant production by Bacillus sp. Gilbert was optimal when sodium carbonate (95.2 percent flocculating activity) and potassium nitrate (76.6 percent flocculating activity) were used as carbon and nitrogen sources respectively; inoculum size was 3 percent (v/v); initial pH 9; and Al3+ as cation. The crude bioflocculant retained 44.2 percent residual flocculating activity after heating at 100 oC for 15 min. FTIR analysis reveals the presence of hydroxyl, carboxyl and methylene - groups in the compound bioflocculant. SEM micrograph of the bioflocculant revealed an amorphous compound. The consortia of these bacteria strains also produced bioflocculants with high flocculating activities which were highly efficient in removing turbidity and chemical oxygen demand (COD) from brewery wastewater, diary wastewater and river water. The bioflocculants from the consortia seemed better than traditional flocculants such as alum . The characteristics of the bioflocculant produced by the consortium of Cobetia sp. OAUIFE and Bacillus sp. MAYA showed that this extracellular bioflocculant, composed of 66percent uronic acid and 31percent protein and an optimum flocculation (90 percent) of kaolin suspension, when the dosage concentration was 0.8 mg/ml, under weak alkaline pH of 8, and Ca2+ as a coagulant aid. The bioflocculant is thermally stable, with a high residual flocculating activity of 86.7 percent, 89.3 percent and 87.0 percent after heating at 50 oC, 80 oC and 100 oC for 25 min respectively. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl functional groups. Scanning electron microscopy (SEM) image revealed a crystal-linear spongy-like bioflocculant structure and EDX analysis of the purified bioflocculant showed that the elemental composition in mass proportion of C,N,O,S and P was 6.67:6.23:37.55:0.38:4.42 (percent w/w). However, the characteristics of the bioflocculant produced by the consortium of Cobetia sp OAUIFE and Bacillus sp. Gilbert showed an optimum flocculation (90 percent) of kaolin suspension when the dosage concentration was 0.2 mg/ml, under neutral pH of 7, and Ca2+ as a coagulant aid. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl and carbonyl functional groups. Scanning electron microscopy (SEM) image revealed an amorphous morphology. On the other hand the bioflocculant produced by the consortium of Bacillus sp. MAYA and Bacillus sp. Gilbert showed similar characteristic with the bioflocculant from the consortium of Cobetia sp. OAUIFE and Bacillus sp. Gilbert except for Al3+ being the preferred coagulant aid. The characteristics of the bioflocculant produced by the consortium of Cobetia sp. OAUIFE, Bacillus sp. MAYA and Bacillus sp. Gilbert showed an optimum flocculation (87 percent) of kaolin suspension when the dosage concentration was 1.0 mg/ml. Under strong alkaline pH of 12, flocculating activity reached (95 percent) when Al3+ was the coagulant aid. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl and phosphoryl functional groups. Scanning electron microscopy (SEM) image revealed a flaky amorphous morphological structure. Due to the excellent COD and turbidity removal efficiencies of the bioflocculants produced by the consortia, these make those attractive candidates for use in water and wastewater treatment. , Thesis (PhD) -- Faculty of Science and Agriculture, 2013
- Full Text:
- Date Issued: 2013
- Authors: Ugbenyen, Anthony Moses https://orcid.org/0000-0002-1381-3428
- Date: 2013
- Subjects: Water -- Purification -- Flocculation , Water quality management , Flocculation
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/24454 , vital:62804
- Description: The bioflocculant-producing potentials of three marine bacteria isolated from the sediment samples of Algoa Bay in the Eastern Cape Province of South Africa were assessed. Analysis of the partial nucleotide sequence of the 16S rDNA of the bacteria revealed 99 percent, 99 percent, and 98 percent similarity to Cobetia sp. L222, Bacillus sp. A-5A, and Bacillus sp. HXG-C1 respectively and the sequence was deposited in GenBank as Cobetia sp. OAUIFE, Bacillus sp. MAYA and Bacillus sp. Gilbert (accession number JF799092, JF799093, and HQ537128 respectively). Cultivation condition studies for Cobetia sp. OAUIFE revealed that bioflocculant production was optimal with an inoculum size of 2 percent (v/v), initial pH of 6.0, Mn2+ as the metal ion, and glucose as the carbon source. Metal ions, including Na+, K+, Li+, Ca2+and Mg2+ stimulated bioflocculant production resulting in flocculating activity of above 90 percent. This crude bioflocculant is thermally stable, with about 78 percent of its flocculating activity remaining after heating at 100 oC for 25 min. Analysis of the purified bioflocculant revealed it to be an acidic extracellular polysaccharide. FTIR analysis revealed the presence of methoxyl, hydroxyl, and carboxyl - groups in the compound bioflocculant and SEM micrograph of the bioflocculant revealed a crystal-linear structure. On the other hand, bioflocculant production by Bacillus sp. MAYA was optimal when glucose (95.6 percent flocculating activity) and ammonium nitrate (83.3 percent flocculating activity) were used as carbon and nitrogen sources respectively; inoculum size was 2 percent (v/v); initial pH 6; and Ca2+ as coagulant aid. Chemical analysis of the purified bioflocculant shows that it is composed of uronic acid, neutral sugar and protein. FTIR analysis also revealed the presence of methoxyl, hydroxyl, carboxyl and amino- groups in this bioflocculant. The bioflocculant is thermostable with about 65.6 percent residual flocculating activity retained after heating the bioflocculant at 100 oC for 25 min. However bioflocculant production by Bacillus sp. Gilbert was optimal when sodium carbonate (95.2 percent flocculating activity) and potassium nitrate (76.6 percent flocculating activity) were used as carbon and nitrogen sources respectively; inoculum size was 3 percent (v/v); initial pH 9; and Al3+ as cation. The crude bioflocculant retained 44.2 percent residual flocculating activity after heating at 100 oC for 15 min. FTIR analysis reveals the presence of hydroxyl, carboxyl and methylene - groups in the compound bioflocculant. SEM micrograph of the bioflocculant revealed an amorphous compound. The consortia of these bacteria strains also produced bioflocculants with high flocculating activities which were highly efficient in removing turbidity and chemical oxygen demand (COD) from brewery wastewater, diary wastewater and river water. The bioflocculants from the consortia seemed better than traditional flocculants such as alum . The characteristics of the bioflocculant produced by the consortium of Cobetia sp. OAUIFE and Bacillus sp. MAYA showed that this extracellular bioflocculant, composed of 66percent uronic acid and 31percent protein and an optimum flocculation (90 percent) of kaolin suspension, when the dosage concentration was 0.8 mg/ml, under weak alkaline pH of 8, and Ca2+ as a coagulant aid. The bioflocculant is thermally stable, with a high residual flocculating activity of 86.7 percent, 89.3 percent and 87.0 percent after heating at 50 oC, 80 oC and 100 oC for 25 min respectively. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl functional groups. Scanning electron microscopy (SEM) image revealed a crystal-linear spongy-like bioflocculant structure and EDX analysis of the purified bioflocculant showed that the elemental composition in mass proportion of C,N,O,S and P was 6.67:6.23:37.55:0.38:4.42 (percent w/w). However, the characteristics of the bioflocculant produced by the consortium of Cobetia sp OAUIFE and Bacillus sp. Gilbert showed an optimum flocculation (90 percent) of kaolin suspension when the dosage concentration was 0.2 mg/ml, under neutral pH of 7, and Ca2+ as a coagulant aid. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl and carbonyl functional groups. Scanning electron microscopy (SEM) image revealed an amorphous morphology. On the other hand the bioflocculant produced by the consortium of Bacillus sp. MAYA and Bacillus sp. Gilbert showed similar characteristic with the bioflocculant from the consortium of Cobetia sp. OAUIFE and Bacillus sp. Gilbert except for Al3+ being the preferred coagulant aid. The characteristics of the bioflocculant produced by the consortium of Cobetia sp. OAUIFE, Bacillus sp. MAYA and Bacillus sp. Gilbert showed an optimum flocculation (87 percent) of kaolin suspension when the dosage concentration was 1.0 mg/ml. Under strong alkaline pH of 12, flocculating activity reached (95 percent) when Al3+ was the coagulant aid. The FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl and phosphoryl functional groups. Scanning electron microscopy (SEM) image revealed a flaky amorphous morphological structure. Due to the excellent COD and turbidity removal efficiencies of the bioflocculants produced by the consortia, these make those attractive candidates for use in water and wastewater treatment. , Thesis (PhD) -- Faculty of Science and Agriculture, 2013
- Full Text:
- Date Issued: 2013
An exploration of teacher leadership: a case study in a Namibian rural primary school
- Authors: Uiseb, Gerson
- Date: 2013
- Subjects: Educational leadership -- Namibia -- Otjozondjupa -- Case studies Education, Elementary -- Namibia -- Otjozondjupa -- Case studies School management and organization -- Namibia -- Otjozondjupa -- Case studies Educational change -- Namibia -- Case studies Education, Rural -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1394 , http://hdl.handle.net/10962/d1001715
- Description: The Namibian education system has undergone a policy shift from a top-down leadership practice or head-centred leadership to a more shared form of leadership in schools. Existing policy documents call for teacher participation in school level decision-making structures and processes as teachers often are involved in other activities and have been through life experiences which equip them with leadership skills. These policies clearly stipulate that school principals cannot lead and manage the schools alone, but should involve teachers and other stakeholders in leadership activities. This study explored teacher leadership in a rural primary school in the Otjozondjupa region of Namibia. The study explored the understanding of the concept teacher leadership, the practice of teacher leadership and the enhancing factors as well as barriers to teacher leadership practice. A qualitative interpretative case study was conducted. Interviews, document analysis, focus group interviews, a questionnaire and observation were employed to produce data with regard to teacher leadership practices in the case study school. The data were analysed thematically using Grant’s (2008) model of teacher leadership. Findings revealed that the concept of teacher leadership was understood as teachers leading both within and beyond the classroom. Teacher leadership was practiced across the fours zones of teacher leadership (after Grant, 2008), but to varying degrees. It could be categorized as emergent teacher leadership (after Muijs and Harris, 2005) within a formal distributed leadership framework (MacBeath, 2005). Teacher leadership in the case study school was enhanced by collaboration among staff and involvement of teachers in school level decision-making. However, barriers to teacher leadership at the case study school included holding on to power by the principal, teachers’ negative attitudes towards teacher leadership, a lack of incentives, a lack of time due to a heavy work load and a lack of professional development.
- Full Text:
- Date Issued: 2013
- Authors: Uiseb, Gerson
- Date: 2013
- Subjects: Educational leadership -- Namibia -- Otjozondjupa -- Case studies Education, Elementary -- Namibia -- Otjozondjupa -- Case studies School management and organization -- Namibia -- Otjozondjupa -- Case studies Educational change -- Namibia -- Case studies Education, Rural -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1394 , http://hdl.handle.net/10962/d1001715
- Description: The Namibian education system has undergone a policy shift from a top-down leadership practice or head-centred leadership to a more shared form of leadership in schools. Existing policy documents call for teacher participation in school level decision-making structures and processes as teachers often are involved in other activities and have been through life experiences which equip them with leadership skills. These policies clearly stipulate that school principals cannot lead and manage the schools alone, but should involve teachers and other stakeholders in leadership activities. This study explored teacher leadership in a rural primary school in the Otjozondjupa region of Namibia. The study explored the understanding of the concept teacher leadership, the practice of teacher leadership and the enhancing factors as well as barriers to teacher leadership practice. A qualitative interpretative case study was conducted. Interviews, document analysis, focus group interviews, a questionnaire and observation were employed to produce data with regard to teacher leadership practices in the case study school. The data were analysed thematically using Grant’s (2008) model of teacher leadership. Findings revealed that the concept of teacher leadership was understood as teachers leading both within and beyond the classroom. Teacher leadership was practiced across the fours zones of teacher leadership (after Grant, 2008), but to varying degrees. It could be categorized as emergent teacher leadership (after Muijs and Harris, 2005) within a formal distributed leadership framework (MacBeath, 2005). Teacher leadership in the case study school was enhanced by collaboration among staff and involvement of teachers in school level decision-making. However, barriers to teacher leadership at the case study school included holding on to power by the principal, teachers’ negative attitudes towards teacher leadership, a lack of incentives, a lack of time due to a heavy work load and a lack of professional development.
- Full Text:
- Date Issued: 2013
Learners' participation in leadership: a case study in a secondary school in Namibia
- Authors: Uushona, Andreas Bishi
- Date: 2013
- Subjects: Educational leadership -- Namibia -- Case studies Student participation in administration -- Namibia -- Case studies School management and organization -- Namibia -- Case studies Student government -- Namibia Education, Secondary -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1395 , http://hdl.handle.net/10962/d1001749
- Description: Learner leadership is a worldwide issue in educational leadership and management. In preindependent Namibia secondary schools had the prefect system and the SRCs as learner leadership bodies which had little influence on schools’ decisions because they lacked credibility. In 2001 the Learners’ Representative Council (LRC) was legitimized as a learner leadership body in secondary schools through the Education Act 16 of 2001. However, recent research suggests that even these bodies are not functioning effectively for a variety of reasons. This prompted me to undertake research to develop an understanding of learners’ participation in leadership in a senior secondary school in Namibia. I used a qualitative case study, in an interpretive paradigm, in an attempt to achieve my research goal. The following questions guided the study: How is leadership understood by members of the organization? How learner leadership is understood? How are learners involved in leadership in the school? What potential exists for increased learners’ participation? What factors inhibit learners’ participation in leadership in the school? A population comprising of the school board chairperson, the principal, three heads of department, the superintendent, three teachers and five learners was composed from a senior secondary school in Namibia. Data were collected through focus groups, interviews, document analysis and observation and analyzed thematically for reflective discussion. The findings revealed that the LRC is functioning but providing little opportunity for learner leadership development. The most significant challenge relates to traditional and outdated views of leadership on the parts of teachers and education managers. Hence, in addition to a number of practical recommendations, the study recommends a change of mindset towards children so that opportunities are provided to contribute to their growth and development.
- Full Text:
- Date Issued: 2013
- Authors: Uushona, Andreas Bishi
- Date: 2013
- Subjects: Educational leadership -- Namibia -- Case studies Student participation in administration -- Namibia -- Case studies School management and organization -- Namibia -- Case studies Student government -- Namibia Education, Secondary -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1395 , http://hdl.handle.net/10962/d1001749
- Description: Learner leadership is a worldwide issue in educational leadership and management. In preindependent Namibia secondary schools had the prefect system and the SRCs as learner leadership bodies which had little influence on schools’ decisions because they lacked credibility. In 2001 the Learners’ Representative Council (LRC) was legitimized as a learner leadership body in secondary schools through the Education Act 16 of 2001. However, recent research suggests that even these bodies are not functioning effectively for a variety of reasons. This prompted me to undertake research to develop an understanding of learners’ participation in leadership in a senior secondary school in Namibia. I used a qualitative case study, in an interpretive paradigm, in an attempt to achieve my research goal. The following questions guided the study: How is leadership understood by members of the organization? How learner leadership is understood? How are learners involved in leadership in the school? What potential exists for increased learners’ participation? What factors inhibit learners’ participation in leadership in the school? A population comprising of the school board chairperson, the principal, three heads of department, the superintendent, three teachers and five learners was composed from a senior secondary school in Namibia. Data were collected through focus groups, interviews, document analysis and observation and analyzed thematically for reflective discussion. The findings revealed that the LRC is functioning but providing little opportunity for learner leadership development. The most significant challenge relates to traditional and outdated views of leadership on the parts of teachers and education managers. Hence, in addition to a number of practical recommendations, the study recommends a change of mindset towards children so that opportunities are provided to contribute to their growth and development.
- Full Text:
- Date Issued: 2013
An investigation into how grade 9 learners make sense of the fermentation and distillation processes through exploring the indigenous practice of making the traditional alcoholic beverage called Ombike: a case study
- Uushona, Kleopas Ipinge Twegathetwa
- Authors: Uushona, Kleopas Ipinge Twegathetwa
- Date: 2013
- Subjects: Science -- Study and teaching (Secondary) -- Namibia -- Omusati -- Case studies High school students -- Namibia -- Omusati -- Social life and customs -- Case studies Education, Secondary -- Namibia -- Omusati Brewing -- Study and teaching -- Namibia Ovambo (African people) -- Namibia -- Social life and customs
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1396 , http://hdl.handle.net/10962/d1001757
- Description: One of the purposes of the Namibian curriculum is to ensure cultural inclusivity. That is, it recognises the inclusion of traditional cultural practices and experiences in science lessons where appropriate. Based on my experiences both as a learner and a science teacher, I have noted there is a rapid decline and loss of values in most of our cultural practices and heritages. This triggered my interests to do a study on an Oshiwambo traditional beverage known as Ombike. This study is therefore aimed at enhancing conceptual development, meaning making and understanding of concepts in fermentation and distillation. This study was conducted with my grade 9 learners at a school where I was teaching in Omusati region of Namibia. A community member who served as an expert was also a participant. She was involved more in discussions, interviews and most importantly in showing and demonstrating to the learners how Ombike is made practically. Essentially, the goal of this study was to investigate how the indigenous practice associated with the making of Ombike can be used to support meaning making of fermentation and distillation processes. This research is located within an interpretive paradigm where a qualitative case study was adopted. I consider this methodological framework appropriate in this study because it allowed me to use the following data gathering methods: brainstorming and discussion, observation, semi-structured and focus group interviews, and practical activities worksheet. Multiple methods were used for the purpose of triangulation and validation. An inductive analysis was used to discover data patterns and themes from the data. Moreover, ethical considerations were also taken seriously and all the participants gave informed consent. The findings of the study revealed that brainstorming and discussions were an appropriate strategy in eliciting learners’ prior everyday knowledge and experiences on, in particular, the making of Ombike. Furthermore, learner engagement and conceptual development were enhanced. This suggests that contextualisation of knowledge can enhance meaningful learning if it is properly planned. It was also found that practical activities in conjunction with mind maps helped learners to make meanings of scientific concepts. Based on my research findings, I therefore recommend the following three aspects: the consideration of learners` prior knowledge and experiences; contextualising knowledge through use of indigenous knowledge; and the learners’ active involvement in practical activities with an emphasis on key scientific concepts to be developed. That is, there is a need to teach for conceptual understanding.
- Full Text:
- Date Issued: 2013
- Authors: Uushona, Kleopas Ipinge Twegathetwa
- Date: 2013
- Subjects: Science -- Study and teaching (Secondary) -- Namibia -- Omusati -- Case studies High school students -- Namibia -- Omusati -- Social life and customs -- Case studies Education, Secondary -- Namibia -- Omusati Brewing -- Study and teaching -- Namibia Ovambo (African people) -- Namibia -- Social life and customs
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1396 , http://hdl.handle.net/10962/d1001757
- Description: One of the purposes of the Namibian curriculum is to ensure cultural inclusivity. That is, it recognises the inclusion of traditional cultural practices and experiences in science lessons where appropriate. Based on my experiences both as a learner and a science teacher, I have noted there is a rapid decline and loss of values in most of our cultural practices and heritages. This triggered my interests to do a study on an Oshiwambo traditional beverage known as Ombike. This study is therefore aimed at enhancing conceptual development, meaning making and understanding of concepts in fermentation and distillation. This study was conducted with my grade 9 learners at a school where I was teaching in Omusati region of Namibia. A community member who served as an expert was also a participant. She was involved more in discussions, interviews and most importantly in showing and demonstrating to the learners how Ombike is made practically. Essentially, the goal of this study was to investigate how the indigenous practice associated with the making of Ombike can be used to support meaning making of fermentation and distillation processes. This research is located within an interpretive paradigm where a qualitative case study was adopted. I consider this methodological framework appropriate in this study because it allowed me to use the following data gathering methods: brainstorming and discussion, observation, semi-structured and focus group interviews, and practical activities worksheet. Multiple methods were used for the purpose of triangulation and validation. An inductive analysis was used to discover data patterns and themes from the data. Moreover, ethical considerations were also taken seriously and all the participants gave informed consent. The findings of the study revealed that brainstorming and discussions were an appropriate strategy in eliciting learners’ prior everyday knowledge and experiences on, in particular, the making of Ombike. Furthermore, learner engagement and conceptual development were enhanced. This suggests that contextualisation of knowledge can enhance meaningful learning if it is properly planned. It was also found that practical activities in conjunction with mind maps helped learners to make meanings of scientific concepts. Based on my research findings, I therefore recommend the following three aspects: the consideration of learners` prior knowledge and experiences; contextualising knowledge through use of indigenous knowledge; and the learners’ active involvement in practical activities with an emphasis on key scientific concepts to be developed. That is, there is a need to teach for conceptual understanding.
- Full Text:
- Date Issued: 2013
Investigating the relationship between discipline and student performance in the schools of Kwanobuhle township: 'The discipline factor'
- Authors: Vaaltein, Lawana David
- Date: 2013
- Subjects: School discipline
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8310 , http://hdl.handle.net/10948/d1020035
- Description: Indiscipline in schools has been so pervasive that in many instances, learning and teaching have become difficult, if not impossible. There are so many reports of indiscipline in schools that school authorities are continuously trying to find solutions to this catastrophic phenomenon. It is believed that the lack of discipline in schools is a major contributing factor to the failure rate and poor performance of learners. The purpose of the study is to investigate whether indiscipline in township schools has a negative impact on the performance of learners in those schools. There are reports that there is an unacceptable and ruinous level of indiscipline therein. The targeted participants in the research are principals and educators from five senior secondary schools of KwaNobuhle Township, Uitenhage. The participants were purposely selected because of their many years of teaching experience and working with learners. Qualitative and quantitative approaches were used to collect data from participants. Data collection instruments consisted of interviews done with participants and questionnaires filled in by the aforementioned stakeholders. This evidence showed that there are many learning and teaching hours lost due to direct indiscipline and dealing with discipline. This subsequently renders learning and teaching ineffective. It is obvious that, once teaching and learning is ineffective, this will, definitely result in the poor performance of learners and high rate of failure. The study recommends that serious and urgent steps must be taken to minimize or eradicate the menace of indiscipline in these schools as soon as possible. Indiscipline cannot be ignored or taken lightly because there are already so many other structural misfortunes in the education system that are stumbling blocks to the academic achievements of township learners, namely, socio-economic conditions, crime, drugs, alcohol and unemployment. As long as discipline is a problem in the township schools, learners will perpetuate to perform poorly and the failure rate in these schools will rise.
- Full Text:
- Date Issued: 2013
- Authors: Vaaltein, Lawana David
- Date: 2013
- Subjects: School discipline
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8310 , http://hdl.handle.net/10948/d1020035
- Description: Indiscipline in schools has been so pervasive that in many instances, learning and teaching have become difficult, if not impossible. There are so many reports of indiscipline in schools that school authorities are continuously trying to find solutions to this catastrophic phenomenon. It is believed that the lack of discipline in schools is a major contributing factor to the failure rate and poor performance of learners. The purpose of the study is to investigate whether indiscipline in township schools has a negative impact on the performance of learners in those schools. There are reports that there is an unacceptable and ruinous level of indiscipline therein. The targeted participants in the research are principals and educators from five senior secondary schools of KwaNobuhle Township, Uitenhage. The participants were purposely selected because of their many years of teaching experience and working with learners. Qualitative and quantitative approaches were used to collect data from participants. Data collection instruments consisted of interviews done with participants and questionnaires filled in by the aforementioned stakeholders. This evidence showed that there are many learning and teaching hours lost due to direct indiscipline and dealing with discipline. This subsequently renders learning and teaching ineffective. It is obvious that, once teaching and learning is ineffective, this will, definitely result in the poor performance of learners and high rate of failure. The study recommends that serious and urgent steps must be taken to minimize or eradicate the menace of indiscipline in these schools as soon as possible. Indiscipline cannot be ignored or taken lightly because there are already so many other structural misfortunes in the education system that are stumbling blocks to the academic achievements of township learners, namely, socio-economic conditions, crime, drugs, alcohol and unemployment. As long as discipline is a problem in the township schools, learners will perpetuate to perform poorly and the failure rate in these schools will rise.
- Full Text:
- Date Issued: 2013
The impact of stock market development on economic growth: evidence from South Africa
- Authors: Vacu, Nomfundo Portia
- Date: 2013
- Subjects: Stock exchanges -- South Africa , Economic development -- South Africa , Stocks -- Economic aspects -- South Africa , South Africa -- Economic conditions , Stock market development , Economic growth , South Africa
- Language: English
- Type: Thesis , Masters , M Com
- Identifier: vital:11655 , http://hdl.handle.net/10353/d1006983 , Stock exchanges -- South Africa , Economic development -- South Africa , Stocks -- Economic aspects -- South Africa , South Africa -- Economic conditions , Stock market development , Economic growth , South Africa
- Description: The main objective of this study is to examine the long run relationship between stock market development and economic growth in the case of South Africa. The study used quarterly data covering the period from 1990Q1 to 2010Q4. To empirically test the link between the two variables, the study used the Johnson’s cointegration approach and Granger causality so as to test the direction of the relationship. The Vector Error Correction Model was also employed to capture both short run and long run dynamics. Generally, the results reveal that a long run relationship exists between the two variables and the causality flows from economic growth to stock market development. Also, the extent to which of stock market development impacts on growth is statistically weak.
- Full Text:
- Date Issued: 2013
- Authors: Vacu, Nomfundo Portia
- Date: 2013
- Subjects: Stock exchanges -- South Africa , Economic development -- South Africa , Stocks -- Economic aspects -- South Africa , South Africa -- Economic conditions , Stock market development , Economic growth , South Africa
- Language: English
- Type: Thesis , Masters , M Com
- Identifier: vital:11655 , http://hdl.handle.net/10353/d1006983 , Stock exchanges -- South Africa , Economic development -- South Africa , Stocks -- Economic aspects -- South Africa , South Africa -- Economic conditions , Stock market development , Economic growth , South Africa
- Description: The main objective of this study is to examine the long run relationship between stock market development and economic growth in the case of South Africa. The study used quarterly data covering the period from 1990Q1 to 2010Q4. To empirically test the link between the two variables, the study used the Johnson’s cointegration approach and Granger causality so as to test the direction of the relationship. The Vector Error Correction Model was also employed to capture both short run and long run dynamics. Generally, the results reveal that a long run relationship exists between the two variables and the causality flows from economic growth to stock market development. Also, the extent to which of stock market development impacts on growth is statistically weak.
- Full Text:
- Date Issued: 2013
Describing the relationship between the cognitive and linguistic complexity of a mathematical literacy examination and types of student errors
- Authors: Vale, Pamela
- Date: 2013
- Subjects: Mathematics -- Study and teaching (Secondary) -- Research -- South Africa Mathematics -- Study and teaching (Secondary) -- South Africa -- Evaluation Mathematics -- Study and teaching (Secondary) -- South Africa -- Evaluation Communication in foreign language education -- Research -- South Africa Communication in foreign language education -- Research -- South Africa Education, Secondary -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1397 , http://hdl.handle.net/10962/d1001774
- Description: Much prior research has shown that if students have a poor command of the language in which they are taught and assessed, they experience a complex and deep learning disadvantage (Barton & Neville-Barton, 2003). Abedi (2006) mentions, in particular, that unnecessary linguistic complexity can threaten the validity of examination items and thus compromises the fairness of the assessment for English language learners. In Clarkson’s (1991, p. 31) research it was found that for the English language learners in the study “comprehension errors [made] up a high proportion of the errors made when…students attempt[ed] to solve mathematical word problems”. In an attempt to explore whether this was the case for a group of National Certificate (Vocational) [NC(V)] students at an FET college, the research conducted in this study focused on describing the cognitive and linguistic complexity of Level 4 Mathematical Literacy examination items as well as the types of responses from a sample of students. A mixed-methods case study design was selected. Student errors were classified as either due to mathematical literacy-related sources, or language-related sources and the question was asked as to how the cognitive and linguistic complexity of items might be related to the types of errors made. Statistically significant correlations were found between the linguistic complexity of items and language-related errors, and between the cognitive complexity of items and all types of errors. It was also possible to identify which language features, in particular, were statistically significantly correlated with linguistic complexity, namely: prepositional phrases; words of 7 letters or more and complex/compound sentences. As was expected, the majority of errors were categorised as mathematical literacy-related. However, as many as 19.22% of all errors made were identified as language-related. While the scope of the study prevents any generalisations from being made, the results indicate a need for a larger-scale study of this nature to determine if the complex and deep learning disadvantage mentioned by Barton and Neville-Barton (2003) does exist with regard to the assessment of Mathematical Literacy for NC(V) students who are English language learners (Barton & Neville-Barton, 2003).
- Full Text:
- Date Issued: 2013
- Authors: Vale, Pamela
- Date: 2013
- Subjects: Mathematics -- Study and teaching (Secondary) -- Research -- South Africa Mathematics -- Study and teaching (Secondary) -- South Africa -- Evaluation Mathematics -- Study and teaching (Secondary) -- South Africa -- Evaluation Communication in foreign language education -- Research -- South Africa Communication in foreign language education -- Research -- South Africa Education, Secondary -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1397 , http://hdl.handle.net/10962/d1001774
- Description: Much prior research has shown that if students have a poor command of the language in which they are taught and assessed, they experience a complex and deep learning disadvantage (Barton & Neville-Barton, 2003). Abedi (2006) mentions, in particular, that unnecessary linguistic complexity can threaten the validity of examination items and thus compromises the fairness of the assessment for English language learners. In Clarkson’s (1991, p. 31) research it was found that for the English language learners in the study “comprehension errors [made] up a high proportion of the errors made when…students attempt[ed] to solve mathematical word problems”. In an attempt to explore whether this was the case for a group of National Certificate (Vocational) [NC(V)] students at an FET college, the research conducted in this study focused on describing the cognitive and linguistic complexity of Level 4 Mathematical Literacy examination items as well as the types of responses from a sample of students. A mixed-methods case study design was selected. Student errors were classified as either due to mathematical literacy-related sources, or language-related sources and the question was asked as to how the cognitive and linguistic complexity of items might be related to the types of errors made. Statistically significant correlations were found between the linguistic complexity of items and language-related errors, and between the cognitive complexity of items and all types of errors. It was also possible to identify which language features, in particular, were statistically significantly correlated with linguistic complexity, namely: prepositional phrases; words of 7 letters or more and complex/compound sentences. As was expected, the majority of errors were categorised as mathematical literacy-related. However, as many as 19.22% of all errors made were identified as language-related. While the scope of the study prevents any generalisations from being made, the results indicate a need for a larger-scale study of this nature to determine if the complex and deep learning disadvantage mentioned by Barton and Neville-Barton (2003) does exist with regard to the assessment of Mathematical Literacy for NC(V) students who are English language learners (Barton & Neville-Barton, 2003).
- Full Text:
- Date Issued: 2013
A framework for biometrics for social grants in South Africa
- Authors: Van de Haar, Helen Augusta
- Date: 2013
- Subjects: Biometric identification -- Law and legislation -- South Africa , Biometric identification cards -- South Africa , Public welfare -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:9829 , http://hdl.handle.net/10948/d1021018
- Description: In the South African Social Security Agency (SASSA) Annual Report of 2011/2012 it is stated that there were more than 15 million social grants paid out to needy beneficiaries of which 10 927 731 were Child Support Grants. A major challenge that is continually being addressed is the management and administration of these grants. In particular, the focus is on service delivery and zero tolerance to fraud and corruption. SASSA has made various attempts to address these issues, such as the rollout of biometric smart cards in 2012. This research endeavour attempts to discover whether a framework can be designed where necessary factors are taken into consideration to provide for an efficient social grant application and delivery process that uses biometrics. The framework aims to suggest improvements in the use of biometrics for the social grants. Seeing that biometrics in this case is used as a technology to improve a system involving humans, this study followed a Design Science approach and made use of a case study to collect the data required for the study. Literature studies reviewed the fields of social grants and biometrics. The challenges and lessons learnt from current implementations of social grants and biometrics within the South African context and further abroad were also relevant for the study. The framework that resulted from the above was evaluated for validity and applicability after which a modified framework is presented. The research concludes with specific implementation guidelines as well as areas for future research.
- Full Text:
- Date Issued: 2013
- Authors: Van de Haar, Helen Augusta
- Date: 2013
- Subjects: Biometric identification -- Law and legislation -- South Africa , Biometric identification cards -- South Africa , Public welfare -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:9829 , http://hdl.handle.net/10948/d1021018
- Description: In the South African Social Security Agency (SASSA) Annual Report of 2011/2012 it is stated that there were more than 15 million social grants paid out to needy beneficiaries of which 10 927 731 were Child Support Grants. A major challenge that is continually being addressed is the management and administration of these grants. In particular, the focus is on service delivery and zero tolerance to fraud and corruption. SASSA has made various attempts to address these issues, such as the rollout of biometric smart cards in 2012. This research endeavour attempts to discover whether a framework can be designed where necessary factors are taken into consideration to provide for an efficient social grant application and delivery process that uses biometrics. The framework aims to suggest improvements in the use of biometrics for the social grants. Seeing that biometrics in this case is used as a technology to improve a system involving humans, this study followed a Design Science approach and made use of a case study to collect the data required for the study. Literature studies reviewed the fields of social grants and biometrics. The challenges and lessons learnt from current implementations of social grants and biometrics within the South African context and further abroad were also relevant for the study. The framework that resulted from the above was evaluated for validity and applicability after which a modified framework is presented. The research concludes with specific implementation guidelines as well as areas for future research.
- Full Text:
- Date Issued: 2013
Shame, cognitive vulnerabilities and traumatic stress in adult rape survivors
- Authors: Van de Water, Tanya
- Date: 2013
- Subjects: Rape trauma syndrome -- South Africa , Shame -- South Africa , Rape victims -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9969 , http://hdl.handle.net/10948/d1020947
- Description: The prevalence of rape in South Africa has reached epidemic proportions. The experience of shame in a rape victim may impact on issues such as disclosure and avoidance (which increases posttraumatic stress severity (PSS)). It is also known that other cognitive vulnerabilities such as anxiety sensitivity, rumination, looming cognitive style, and attribution style impacts the severity of traumatic stress. These vulnerabilities overlap with the experience of shame conceptually. It remains unclear whether shame has a direct relationship with severity or whether it influences other dynamics that eventually contributes to increases in (PSS). 37 female adult rape survivors from a local NGO completed a biographical questionnaire and a variety of quantitative measures of shame (Experience of Shame Scale (ESS)), PSS (Harvard Trauma Questionnaire – Revised (HTQ-R)), anxiety sensitivity (Anxiety Sensitivity Index – 3(ASI-3)), rumination (Perseverative Thinking Questionnaire (PTQ)), looming cognitive style (Looming Maladaptive Style Questionnaire (LMSQ)), and attribution style (Attribution Style Questionnaire (ASQ)). Initial explorations were done to determine the cross-group equivalence of these measures since it was the first time some of them were used in South Africa (and exclusively on rape survivors). The construct, semantic, and metric equivalence findings are reported for each measure. In this regard all measures apart from the ASQ had good internal consistency but factor analyses indicated that the measures are more reasonably seen to measure single factor constructs rather than the configuration presupposed by the constituent subscales. The evidence indicates that total scores may be used with some confidence in the construct validity and internal consistency of these measures (with the exception of the ASQ), but that subscale scores should not be over interpreted. Furthermore, the presence of cognitive constructs within the sample was explored and it was found that high levels of shame, PSS, and the cognitive vulnerabilities were present. Finally a multiple regression and concomitant analyses indicated that only knowing the perpetrator had any influence on the variables under study and that shame and rumination accounted for the largest amount of variance in PSS.
- Full Text:
- Date Issued: 2013
- Authors: Van de Water, Tanya
- Date: 2013
- Subjects: Rape trauma syndrome -- South Africa , Shame -- South Africa , Rape victims -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9969 , http://hdl.handle.net/10948/d1020947
- Description: The prevalence of rape in South Africa has reached epidemic proportions. The experience of shame in a rape victim may impact on issues such as disclosure and avoidance (which increases posttraumatic stress severity (PSS)). It is also known that other cognitive vulnerabilities such as anxiety sensitivity, rumination, looming cognitive style, and attribution style impacts the severity of traumatic stress. These vulnerabilities overlap with the experience of shame conceptually. It remains unclear whether shame has a direct relationship with severity or whether it influences other dynamics that eventually contributes to increases in (PSS). 37 female adult rape survivors from a local NGO completed a biographical questionnaire and a variety of quantitative measures of shame (Experience of Shame Scale (ESS)), PSS (Harvard Trauma Questionnaire – Revised (HTQ-R)), anxiety sensitivity (Anxiety Sensitivity Index – 3(ASI-3)), rumination (Perseverative Thinking Questionnaire (PTQ)), looming cognitive style (Looming Maladaptive Style Questionnaire (LMSQ)), and attribution style (Attribution Style Questionnaire (ASQ)). Initial explorations were done to determine the cross-group equivalence of these measures since it was the first time some of them were used in South Africa (and exclusively on rape survivors). The construct, semantic, and metric equivalence findings are reported for each measure. In this regard all measures apart from the ASQ had good internal consistency but factor analyses indicated that the measures are more reasonably seen to measure single factor constructs rather than the configuration presupposed by the constituent subscales. The evidence indicates that total scores may be used with some confidence in the construct validity and internal consistency of these measures (with the exception of the ASQ), but that subscale scores should not be over interpreted. Furthermore, the presence of cognitive constructs within the sample was explored and it was found that high levels of shame, PSS, and the cognitive vulnerabilities were present. Finally a multiple regression and concomitant analyses indicated that only knowing the perpetrator had any influence on the variables under study and that shame and rumination accounted for the largest amount of variance in PSS.
- Full Text:
- Date Issued: 2013
Hardware evolution of a digital circuit using a custom VLSI architecture
- Authors: Van den Berg, Allan Edward
- Date: 2013
- Subjects: Digital electronics , Field programmable gate arrays , Sequential machine theory
- Language: English
- Type: Thesis , Masters , MEngineering (Mechatronics)
- Identifier: vital:9661 , http://hdl.handle.net/10948/d1020984
- Description: This research investigates three solutions to overcoming portability and scalability concerns in the Evolutionary Hardware (EHW) field. Firstly, the study explores if the V-FPGA—a new, portable Virtual-Reconfigurable-Circuit architecture—is a practical and viable evolution platform. Secondly, the research looks into two possible ways of making EHW systems more scalable: by optimising the system’s genetic algorithm; and by decomposing the solution circuit into smaller, evolvable sub-circuits or modules. GA optimisation is done is by: omitting a canonical GA’s crossover operator (i.e. by using an algorithm); applying evolution constraints; and optimising the fitness function. The circuit decomposition is done in order to demonstrate modular evolution. Three two-bit multiplier circuits and two sub-circuits of a simple, but real-world control circuit are evolved. The results show that the evolved multiplier circuits, when compared to a conventional multiplier, are either equal or more efficient. All the evolved circuits improve two of the four critical paths, and all are unique. Thus, it is experimentally shown that the V-FPGA is a viable hardware-platform on which hardware evolution can be implemented; and how hardware evolution is able to synthesise novel, optimised versions of conventional circuits. By comparing the and canonical GAs, the results verify that optimised GAs can find solutions quicker, and with fewer attempts. Part of the optimisation also includes a comprehensive critical-path analysis, where the findings show that the identification of dependent critical paths is vital in enhancing a GA’s efficiency. Finally, by demonstrating the modular evolution of a finite-state machine’s control circuit, it is found that although the control circuit as a whole makes use of more than double the available hardware resources on the V-FPGA and is therefore not evolvable, the evolution of each state’s sub-circuit is possible. Thus, modular evolution is shown to be a successful tool when dealing with scalability.
- Full Text:
- Date Issued: 2013
- Authors: Van den Berg, Allan Edward
- Date: 2013
- Subjects: Digital electronics , Field programmable gate arrays , Sequential machine theory
- Language: English
- Type: Thesis , Masters , MEngineering (Mechatronics)
- Identifier: vital:9661 , http://hdl.handle.net/10948/d1020984
- Description: This research investigates three solutions to overcoming portability and scalability concerns in the Evolutionary Hardware (EHW) field. Firstly, the study explores if the V-FPGA—a new, portable Virtual-Reconfigurable-Circuit architecture—is a practical and viable evolution platform. Secondly, the research looks into two possible ways of making EHW systems more scalable: by optimising the system’s genetic algorithm; and by decomposing the solution circuit into smaller, evolvable sub-circuits or modules. GA optimisation is done is by: omitting a canonical GA’s crossover operator (i.e. by using an algorithm); applying evolution constraints; and optimising the fitness function. The circuit decomposition is done in order to demonstrate modular evolution. Three two-bit multiplier circuits and two sub-circuits of a simple, but real-world control circuit are evolved. The results show that the evolved multiplier circuits, when compared to a conventional multiplier, are either equal or more efficient. All the evolved circuits improve two of the four critical paths, and all are unique. Thus, it is experimentally shown that the V-FPGA is a viable hardware-platform on which hardware evolution can be implemented; and how hardware evolution is able to synthesise novel, optimised versions of conventional circuits. By comparing the and canonical GAs, the results verify that optimised GAs can find solutions quicker, and with fewer attempts. Part of the optimisation also includes a comprehensive critical-path analysis, where the findings show that the identification of dependent critical paths is vital in enhancing a GA’s efficiency. Finally, by demonstrating the modular evolution of a finite-state machine’s control circuit, it is found that although the control circuit as a whole makes use of more than double the available hardware resources on the V-FPGA and is therefore not evolvable, the evolution of each state’s sub-circuit is possible. Thus, modular evolution is shown to be a successful tool when dealing with scalability.
- Full Text:
- Date Issued: 2013
GDR development policy with special reference to Africa, c. 1960-1990
- Van der Heyden, Ulrich Klaus Helmut
- Authors: Van der Heyden, Ulrich Klaus Helmut
- Date: 2013
- Subjects: Germany -- Foreign relations -- Africa , Germany -- Foreign economic relations -- Africa , Africa -- Foreign relations -- Germany , Africa -- Foreign economic relations -- Germany , Africa -- Politics and government -- 1960- , Africa -- History -- 1960-
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2531 , http://hdl.handle.net/10962/d1001860
- Description: This thesis explores the political, economic and theoretical underpinnings of the German Democratic Republic’s (GDR’s) development policies towards the Third World between c.1960 and 1990. Particular attention is paid to Africa. Case studies of assistance to SWAPO and the ANC further focus the attention of the reader on southern Africa in particular. Aspects of both military and civilian aid are considered, including both development initiatives overseas in Africa, and development training for Africans within the GDR itself. Since German “reunification”, the GDR’s history has been explored largely from a West German perspective. The present work attempts to provide a more balanced view of successes and shortcomings of the GDR’s policies towards, and interaction with, African countries and liberation movements. It also aims to bring to the attention of English-speaking readers German archival sources, other primary sources and published works which they would otherwise have been unlikely to encounter. From its formation, the GDR made strenuous efforts to develop relations with countries which were either free from colonial dependency or were struggling for freedom. Over the course of thirty years, it followed a number of different approaches, and developed diverse objectives. These were shaped in the wider context of the cold war, the Hallstein doctrine (which established that the FRG – and, in effect, its allies - would not establish or maintain diplomatic relations with any state that recognised the GDR), the relationships between the GDR and partner socialist states, and the economic difficulties faced by the GDR. Arising from this complex situation, from time to time, both internally in the GDR and in terms of its foreign affairs, tensions and discrepancies arose between theoretical objectives and political and economic reality. Despite these severe constraints, during the period under review, the volume and range of the GDR’s relationships with developing countries increased dramatically. For example, between 1970 and 1987, the number of developing countries with which the GDR had foreign economic relations on the basis of international agreements grew from 23 to 64. Viewed within its economic context, the state was arguably far more committed to development aid than the Federal Republic of Germany. In addition, there is a great deal of evidence that “solidarity” with developing nations and the oppressed enjoyed a considerable degree of popular support.
- Full Text:
- Date Issued: 2013
- Authors: Van der Heyden, Ulrich Klaus Helmut
- Date: 2013
- Subjects: Germany -- Foreign relations -- Africa , Germany -- Foreign economic relations -- Africa , Africa -- Foreign relations -- Germany , Africa -- Foreign economic relations -- Germany , Africa -- Politics and government -- 1960- , Africa -- History -- 1960-
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2531 , http://hdl.handle.net/10962/d1001860
- Description: This thesis explores the political, economic and theoretical underpinnings of the German Democratic Republic’s (GDR’s) development policies towards the Third World between c.1960 and 1990. Particular attention is paid to Africa. Case studies of assistance to SWAPO and the ANC further focus the attention of the reader on southern Africa in particular. Aspects of both military and civilian aid are considered, including both development initiatives overseas in Africa, and development training for Africans within the GDR itself. Since German “reunification”, the GDR’s history has been explored largely from a West German perspective. The present work attempts to provide a more balanced view of successes and shortcomings of the GDR’s policies towards, and interaction with, African countries and liberation movements. It also aims to bring to the attention of English-speaking readers German archival sources, other primary sources and published works which they would otherwise have been unlikely to encounter. From its formation, the GDR made strenuous efforts to develop relations with countries which were either free from colonial dependency or were struggling for freedom. Over the course of thirty years, it followed a number of different approaches, and developed diverse objectives. These were shaped in the wider context of the cold war, the Hallstein doctrine (which established that the FRG – and, in effect, its allies - would not establish or maintain diplomatic relations with any state that recognised the GDR), the relationships between the GDR and partner socialist states, and the economic difficulties faced by the GDR. Arising from this complex situation, from time to time, both internally in the GDR and in terms of its foreign affairs, tensions and discrepancies arose between theoretical objectives and political and economic reality. Despite these severe constraints, during the period under review, the volume and range of the GDR’s relationships with developing countries increased dramatically. For example, between 1970 and 1987, the number of developing countries with which the GDR had foreign economic relations on the basis of international agreements grew from 23 to 64. Viewed within its economic context, the state was arguably far more committed to development aid than the Federal Republic of Germany. In addition, there is a great deal of evidence that “solidarity” with developing nations and the oppressed enjoyed a considerable degree of popular support.
- Full Text:
- Date Issued: 2013
An enterprise architecture for environmental information management and reporting
- Authors: Van der Hoogen, Anthea
- Date: 2013
- Subjects: Business enterprises -- Information technology -- Management , Sustainable development reporting , Environmental reporting
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:10499 , http://hdl.handle.net/10948/d1021040
- Description: Organisations globally are communicating their environmental sustainability impact to stakeholders by means of the widely used sustainability report. A key benefit of environmental sustainability reporting is that organisations can gain a positive reputation when these reports are presented to stakeholders. Organisations in South Africa are faced with many challenges regarding managing sustainability information and producing an environmental sustainability report. Two of the primary challenges are the many diverse standards for sustainability reporting and data quality issues. Information Technology (IT) can be used to support and improve the process of sustainability reporting but it is important to align the environmental sustainability strategies with the strategies of business and also with the IT strategy to avoid silos of information and reporting. Enterprise Architecture (EA) can be used to solve alignment problems since it supports business-IT alignment. EA is defined by the International Standards Organisation (ISO) as “The fundamental concepts or properties of a system in its environment embodied in its elements, relationships, and in the principles of its design and evolution”. It can be argued, therefore, that EA can be used to support environmental sustainability information management and the reporting process by means of its support of improved business-IT alignment and ultimately integrated systems. The main objective of this study is to investigate how EA can be used to support environmental information management (EIM) and reporting. A survey study of thirty one prominent South African organisations was undertaken in order to investigate the status of their EA adoption and environmental reporting and EIM processes. An EA for EIM Toolkit and a set of guidelines are proposed which can provide support for EIM through the use of EA. These guidelines were proposed based on best-practice for each of the three process levels of an organisation, namely, the strategic level, the operational level and the technological level. The toolkit and guidelines were derived from theory and the results of the industry survey were then validated by an in-depth analysis of a case study consisting of multiple cases with key employees of seven South African organisations which have proved to be successful at EA and EIM and reporting. The results of the case study show that the EA for EIM Toolkit and related guidelines can assist organisations to align their environmental sustainability strategies with their organisational and IT strategies.
- Full Text:
- Date Issued: 2013
- Authors: Van der Hoogen, Anthea
- Date: 2013
- Subjects: Business enterprises -- Information technology -- Management , Sustainable development reporting , Environmental reporting
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:10499 , http://hdl.handle.net/10948/d1021040
- Description: Organisations globally are communicating their environmental sustainability impact to stakeholders by means of the widely used sustainability report. A key benefit of environmental sustainability reporting is that organisations can gain a positive reputation when these reports are presented to stakeholders. Organisations in South Africa are faced with many challenges regarding managing sustainability information and producing an environmental sustainability report. Two of the primary challenges are the many diverse standards for sustainability reporting and data quality issues. Information Technology (IT) can be used to support and improve the process of sustainability reporting but it is important to align the environmental sustainability strategies with the strategies of business and also with the IT strategy to avoid silos of information and reporting. Enterprise Architecture (EA) can be used to solve alignment problems since it supports business-IT alignment. EA is defined by the International Standards Organisation (ISO) as “The fundamental concepts or properties of a system in its environment embodied in its elements, relationships, and in the principles of its design and evolution”. It can be argued, therefore, that EA can be used to support environmental sustainability information management and the reporting process by means of its support of improved business-IT alignment and ultimately integrated systems. The main objective of this study is to investigate how EA can be used to support environmental information management (EIM) and reporting. A survey study of thirty one prominent South African organisations was undertaken in order to investigate the status of their EA adoption and environmental reporting and EIM processes. An EA for EIM Toolkit and a set of guidelines are proposed which can provide support for EIM through the use of EA. These guidelines were proposed based on best-practice for each of the three process levels of an organisation, namely, the strategic level, the operational level and the technological level. The toolkit and guidelines were derived from theory and the results of the industry survey were then validated by an in-depth analysis of a case study consisting of multiple cases with key employees of seven South African organisations which have proved to be successful at EA and EIM and reporting. The results of the case study show that the EA for EIM Toolkit and related guidelines can assist organisations to align their environmental sustainability strategies with their organisational and IT strategies.
- Full Text:
- Date Issued: 2013
“It’s like uprooting trees”: responsive treatment for a case of complex post-traumatic stress disorder following multiple rapes
- Van der Linde, Francois, Edwards, David J A
- Authors: Van der Linde, Francois , Edwards, David J A
- Date: 2013
- Language: English
- Type: Article
- Identifier: vital:6238 , http://hdl.handle.net/10962/d1007788
- Description: This systematic case study documents 27 sessions of assessment and treatment with cognitive therapy of Bongi (23)who presented with major depression, posttraumatic stress disorder and borderline traits. Bongi had been raised in a punitive environment, had been raped three times, the first time at age 9, and had been in a series of abusive relationships. The treatment illustrates the importance of therapist responsiveness in addressing this kind of complex presentation, the importance of drawing on case formulation to guide the course of treatment and the range of different interventions that need to be incorporated into an integrative treatment of a complex case. Self-report measures of depression, anxiety and posttraumatic stress indicators provided evidence that the therapy contributed to positive changes and the qualitative therapy narrative gives details of the nature of some of those changes. Although treatment was not complete when Bongi moved away, Bongi herself judged that the therapy had been a valuable experience which had resulted in her feeling more alive, more confident, and better able to take care of herself.
- Full Text:
- Date Issued: 2013
- Authors: Van der Linde, Francois , Edwards, David J A
- Date: 2013
- Language: English
- Type: Article
- Identifier: vital:6238 , http://hdl.handle.net/10962/d1007788
- Description: This systematic case study documents 27 sessions of assessment and treatment with cognitive therapy of Bongi (23)who presented with major depression, posttraumatic stress disorder and borderline traits. Bongi had been raised in a punitive environment, had been raped three times, the first time at age 9, and had been in a series of abusive relationships. The treatment illustrates the importance of therapist responsiveness in addressing this kind of complex presentation, the importance of drawing on case formulation to guide the course of treatment and the range of different interventions that need to be incorporated into an integrative treatment of a complex case. Self-report measures of depression, anxiety and posttraumatic stress indicators provided evidence that the therapy contributed to positive changes and the qualitative therapy narrative gives details of the nature of some of those changes. Although treatment was not complete when Bongi moved away, Bongi herself judged that the therapy had been a valuable experience which had resulted in her feeling more alive, more confident, and better able to take care of herself.
- Full Text:
- Date Issued: 2013
Positions on the mat : a micro-ethnographic study of teachers' and learners' co-construction of an early literacy practice
- Authors: Van der Mescht, Caroline
- Date: 2013 , 2013-06-10
- Subjects: Literacy -- Study and teaching (Primary) -- South Africa -- Eastern Cape English language -- Study and teaching (Primary) -- South Africa -- Eastern Cape English literature -- Study and teaching (Primary) -- South Africa -- Eastern Cape Education, Primary -- Research -- South Africa -- Eastern Cape Teachers -- Psychology Language and culture
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1836 , http://hdl.handle.net/10962/d1004333
- Description: Thesis embargoed until end of 2023. , Adobe Acrobat 9.54 Paper Capture Plug-in
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- Date Issued: 2013
- Authors: Van der Mescht, Caroline
- Date: 2013 , 2013-06-10
- Subjects: Literacy -- Study and teaching (Primary) -- South Africa -- Eastern Cape English language -- Study and teaching (Primary) -- South Africa -- Eastern Cape English literature -- Study and teaching (Primary) -- South Africa -- Eastern Cape Education, Primary -- Research -- South Africa -- Eastern Cape Teachers -- Psychology Language and culture
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1836 , http://hdl.handle.net/10962/d1004333
- Description: Thesis embargoed until end of 2023. , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2013
Disaster risk reduction in Namibia (flooding): responses and best practices
- Authors: Van der Ross, Nolan Lloyd
- Date: 2013
- Subjects: Flood damage prevention -- Risk assessment , delete
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9241 , http://hdl.handle.net/10948/d1021114
- Description: This study was undertaken in order to obtain an understanding of how Namibia in general, and the education sector in particular, deal with flood emergencies. The goal of the National Policy for Disaster Risk Management in Namibia (2009) is “to contribute to the attainment of sustainable development in line with Namibia’s Vision 2030 through strengthening national capacities to significantly reduce disaster risk and built community resilience to disasters” (Republic of Namibia, 2009). This goal was the starting point for determining the extent to which the Ministry of Education complies with these national standards, and for gauging, in the light of responses to flood emergencies so far, the Ministry’s preparedness and response capacities, in line with international frameworks that Namibia has ratified. This qualitative study is situated within the theory of resilience, and sustainable resilience particularly. To obtain some of the information sought, a non-probability sampling method was used to ‘hand-pick’ subjects within the Ministry of Education to be interviewed at their respective locations, nationally and regionally. Five education officials who were intimately involved in past responses to flood emergencies were interviewed – three in Oshana and Ohangwena Regions, and two at Head Office in Windhoek – by means of a semi-structured interview. In addition, a literature review was conducted. The conclusions drawn from both the literature review and the information obtained from the respondents accord with the research problem identified: the Ministry of Education does not appear to be adequately prepared for, and does not assign the necessary priority to deal with, flood emergencies in particular. Possible recommendations for uptake within the Ministry of Education include: mainstreaming Disaster Risk Reduction at all decentralized levels; sensitizing all education officials, school community members and relevant stakeholders to policy frameworks and accountability structures to strengthen resilience within school communities; deeming costed contingency planning a priority, and hence strengthening links between decentralized regional structures; and continuously monitoring implementation of designed interventions.
- Full Text:
- Date Issued: 2013
- Authors: Van der Ross, Nolan Lloyd
- Date: 2013
- Subjects: Flood damage prevention -- Risk assessment , delete
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9241 , http://hdl.handle.net/10948/d1021114
- Description: This study was undertaken in order to obtain an understanding of how Namibia in general, and the education sector in particular, deal with flood emergencies. The goal of the National Policy for Disaster Risk Management in Namibia (2009) is “to contribute to the attainment of sustainable development in line with Namibia’s Vision 2030 through strengthening national capacities to significantly reduce disaster risk and built community resilience to disasters” (Republic of Namibia, 2009). This goal was the starting point for determining the extent to which the Ministry of Education complies with these national standards, and for gauging, in the light of responses to flood emergencies so far, the Ministry’s preparedness and response capacities, in line with international frameworks that Namibia has ratified. This qualitative study is situated within the theory of resilience, and sustainable resilience particularly. To obtain some of the information sought, a non-probability sampling method was used to ‘hand-pick’ subjects within the Ministry of Education to be interviewed at their respective locations, nationally and regionally. Five education officials who were intimately involved in past responses to flood emergencies were interviewed – three in Oshana and Ohangwena Regions, and two at Head Office in Windhoek – by means of a semi-structured interview. In addition, a literature review was conducted. The conclusions drawn from both the literature review and the information obtained from the respondents accord with the research problem identified: the Ministry of Education does not appear to be adequately prepared for, and does not assign the necessary priority to deal with, flood emergencies in particular. Possible recommendations for uptake within the Ministry of Education include: mainstreaming Disaster Risk Reduction at all decentralized levels; sensitizing all education officials, school community members and relevant stakeholders to policy frameworks and accountability structures to strengthen resilience within school communities; deeming costed contingency planning a priority, and hence strengthening links between decentralized regional structures; and continuously monitoring implementation of designed interventions.
- Full Text:
- Date Issued: 2013
Numerical relativity on cosmological past null cones
- Van der Walt, Petrus Johannes
- Authors: Van der Walt, Petrus Johannes
- Date: 2013
- Subjects: Cosmology Numerical calculations General relativity (Physics) -- Mathematics Einstein field equations Gravity Gravitational waves Horizon
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5396 , http://hdl.handle.net/10962/d1002959
- Description: The observational approach to cosmology is the endeavour to reconstruct the geometry of the Universe using only data that is theoretically verifiable within the causal boundaries of a cosmological observer. Using this approach, it was shown in [36] that given ideal cosmological observations, the only essential assumption necessary to determine the geometry of the Universe is a theory of gravity. Assuming General Relativity, the full set of Einstein field equations (EFEs) can be used to reconstruct the geometry of the Universe using direct observations on the past null cone (PNC) as initial conditions. Observationally and theoretically this is a very ambitious task and therefore, current developments have been restricted to spherically symmetric dust models while only relaxing the usual assumption of homogeneity in the radial direction. These restricted models are important for the development of theoretical foundations and also useful as verification models since they avoid the circularity of verifying what has already been assumed. The work presented in this thesis is the development of such a model where numerical relativity (NR) is used to simulate the observable universe. Similar to the work of Ellis and co-workers [36], a reference frame based on the PNC is used. The reference frame used here, however, is based on that of the characteristic formalism of NR, which has developed for calculating the propagation of gravitational waves. This provides a formalism that is well established in NR, making the use of existing algorithms possible. The Bondi-Sachs coordinates of the characteristic formalism is, however, not suitable for calculations beyond the observer apparent horizon (AH) since the diameter distance used as a radial coordinate becomes multi-valued when the cosmological PNC reconverges in the history of a universe, smaller in the past. With this taken into consideration, the Bondi-Sachs characteristic formalism is implemented for cosmology and the problem approaching the AH is investigated. Further developments address the limitations approaching the AH by introducing a metric based on the Bondi-Sachs metric where the radial coordinate is replaced with an affine parameter. The model is derived with a cosmological constant Λ incorporated into the EFEs where Λ is taken as a parameter of the theory of gravity rather than as a matter source term. Similar to the conventional characteristic formalism, this model consists of a system of differential equations for numerically evolving the EFEs as a characteristic initial value problem (CIVP). A numerical code implemented for the method has been found to be second order convergent. This code enables simulations of different models given identical data on the initial null cone and provides a method to investigate their physical consistency within the causally connected region of our current PNC. These developments closely follow existing 3D schemes developed for gravitational wave simulations, which should make it natural to extend the affine CIVP beyond spherical symmetric simulations. The developments presented in this thesis is an extended version of two papers published earlier.
- Full Text:
- Date Issued: 2013
- Authors: Van der Walt, Petrus Johannes
- Date: 2013
- Subjects: Cosmology Numerical calculations General relativity (Physics) -- Mathematics Einstein field equations Gravity Gravitational waves Horizon
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5396 , http://hdl.handle.net/10962/d1002959
- Description: The observational approach to cosmology is the endeavour to reconstruct the geometry of the Universe using only data that is theoretically verifiable within the causal boundaries of a cosmological observer. Using this approach, it was shown in [36] that given ideal cosmological observations, the only essential assumption necessary to determine the geometry of the Universe is a theory of gravity. Assuming General Relativity, the full set of Einstein field equations (EFEs) can be used to reconstruct the geometry of the Universe using direct observations on the past null cone (PNC) as initial conditions. Observationally and theoretically this is a very ambitious task and therefore, current developments have been restricted to spherically symmetric dust models while only relaxing the usual assumption of homogeneity in the radial direction. These restricted models are important for the development of theoretical foundations and also useful as verification models since they avoid the circularity of verifying what has already been assumed. The work presented in this thesis is the development of such a model where numerical relativity (NR) is used to simulate the observable universe. Similar to the work of Ellis and co-workers [36], a reference frame based on the PNC is used. The reference frame used here, however, is based on that of the characteristic formalism of NR, which has developed for calculating the propagation of gravitational waves. This provides a formalism that is well established in NR, making the use of existing algorithms possible. The Bondi-Sachs coordinates of the characteristic formalism is, however, not suitable for calculations beyond the observer apparent horizon (AH) since the diameter distance used as a radial coordinate becomes multi-valued when the cosmological PNC reconverges in the history of a universe, smaller in the past. With this taken into consideration, the Bondi-Sachs characteristic formalism is implemented for cosmology and the problem approaching the AH is investigated. Further developments address the limitations approaching the AH by introducing a metric based on the Bondi-Sachs metric where the radial coordinate is replaced with an affine parameter. The model is derived with a cosmological constant Λ incorporated into the EFEs where Λ is taken as a parameter of the theory of gravity rather than as a matter source term. Similar to the conventional characteristic formalism, this model consists of a system of differential equations for numerically evolving the EFEs as a characteristic initial value problem (CIVP). A numerical code implemented for the method has been found to be second order convergent. This code enables simulations of different models given identical data on the initial null cone and provides a method to investigate their physical consistency within the causally connected region of our current PNC. These developments closely follow existing 3D schemes developed for gravitational wave simulations, which should make it natural to extend the affine CIVP beyond spherical symmetric simulations. The developments presented in this thesis is an extended version of two papers published earlier.
- Full Text:
- Date Issued: 2013