Variation in forage quality in subtropical thicket
- Nyembe, Khulisile Jacqueline
- Authors: Nyembe, Khulisile Jacqueline
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Biodiversity -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52088 , vital:43440
- Description: Several studies have assumed that the plant communities of the Subtropical Thicket biome are nutritious throughout the year. This is based on the observation that they are evergreen, palatable and grow on fertile soils; however this assumption has not been tested. Therefore the aim of this study was to assess forage quality variation in the Subtropical Thicket. This was done at three levels; first we measured the plant quality of dominant plant species in the diets of Thicket herbivores. Secondly, we measured the realised diet quality of Thicket herbivores through the analysis of faecal samples. Lastly we assessed the body condition of Thicket herbivores. The study was conducted at the Colchester (plant quality and diet quality) and Addo Main Camp (body condition assessment) sections of Addo Elephant National Park. To measure the food quality of Thicket plants we analysed 10 plants that are dominant in the diets of Thicket herbivores. To measure diet quality we collected faecal samples from ten herbivores with body mass ranging from 25 kg to 6000 kg. Plant quality results showed that only 30% of the sampled plants met the high energy goat diet protein requirements and that all the sampled plants did not meet the high energy goat diet fibre requirements. This indicates that Thicket plants are not as highly nutritious as they were thought to be. The principle components analysis together with overlapping confidence intervals showed that there was no significant difference between the summer plant samples and the winter plant samples. The faecal quality results showed that there was significant seasonal difference and that faecal diet quality was a function of body size. The body condition results showed that all the sampled herbivores lost condition in the cold dry months. The evidence from faecal diet quality and body condition assessment is sufficient for us to reject the assumption that Thicket forage is consistently nutritious throughout the year. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Nyembe, Khulisile Jacqueline
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Biodiversity -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52088 , vital:43440
- Description: Several studies have assumed that the plant communities of the Subtropical Thicket biome are nutritious throughout the year. This is based on the observation that they are evergreen, palatable and grow on fertile soils; however this assumption has not been tested. Therefore the aim of this study was to assess forage quality variation in the Subtropical Thicket. This was done at three levels; first we measured the plant quality of dominant plant species in the diets of Thicket herbivores. Secondly, we measured the realised diet quality of Thicket herbivores through the analysis of faecal samples. Lastly we assessed the body condition of Thicket herbivores. The study was conducted at the Colchester (plant quality and diet quality) and Addo Main Camp (body condition assessment) sections of Addo Elephant National Park. To measure the food quality of Thicket plants we analysed 10 plants that are dominant in the diets of Thicket herbivores. To measure diet quality we collected faecal samples from ten herbivores with body mass ranging from 25 kg to 6000 kg. Plant quality results showed that only 30% of the sampled plants met the high energy goat diet protein requirements and that all the sampled plants did not meet the high energy goat diet fibre requirements. This indicates that Thicket plants are not as highly nutritious as they were thought to be. The principle components analysis together with overlapping confidence intervals showed that there was no significant difference between the summer plant samples and the winter plant samples. The faecal quality results showed that there was significant seasonal difference and that faecal diet quality was a function of body size. The body condition results showed that all the sampled herbivores lost condition in the cold dry months. The evidence from faecal diet quality and body condition assessment is sufficient for us to reject the assumption that Thicket forage is consistently nutritious throughout the year. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
- Full Text: false
- Date Issued: 2021-04
The readiness of embracing the fourth industrial revolution disruptive innovations: a case for an automotive assembler in the Nelson Mandela Metropole
- Authors: Mbolekwa, Luvuyo
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52988 , vital:44866
- Description: Organisations and people find themselves in the era of what is known as the Fourth Industrial Revolution (4IR). Unlike the preceding revolutions, this revolution is characterised by technological advancements that lead to disruptive phenomena. These advancements are growing at an exponential rate. They have brought disruptive innovations that have either reshaped many industries, causing them to lose market share or exit altogether. Some organisations are keen to embrace disruptive innovation to ensure that they are sustainable into the future, while others are only inclined to use known technologies to leverage economies of scale. The 4IR has already been around for a while and is moving at a fast pace. The level of readiness for the automotive assembler, Isuzu Motors South Africa (IMSAf), to take advantage of such technological changes brought by the 4IR, has not yet been measured. The primary objective of this study is to investigate IMSAf’s perceptions and readiness to embrace technological changes brought by the 4IR. The perceptions and readiness are assessed based on the technology embracing organisational framework of efficiencies, innovation, skills and re-training. This study is grounded in the philosophy of positivism and the related method used is a quantitative study to test the research questions in an objective manner. A questionnaire was the sole method of collecting first-hand data from the selected sample. The population size consisted of 139 respondents working in various business units within IMSAf. These individuals are occupying various roles and they have in depth, tacit, and multi-disciplinary knowledge of processes and would be the first to experience technological changes brought by the 4IR. A quantitative analysis technique is applied, such as descriptive and inferential statistics, to analyse data. A literature review on the topic was conducted as well as an empirical study. The results from both the literature review and the empirical study found that with the implementation of 4IR emerging technologies within an organisation, there is a significant improvement on efficiencies, innovation and skills and re-training. Furthermore, the level of awareness and understanding about the benefits of embracing 4IR emerging technologies within IMSAf is significant. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMU Business School, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Mbolekwa, Luvuyo
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52988 , vital:44866
- Description: Organisations and people find themselves in the era of what is known as the Fourth Industrial Revolution (4IR). Unlike the preceding revolutions, this revolution is characterised by technological advancements that lead to disruptive phenomena. These advancements are growing at an exponential rate. They have brought disruptive innovations that have either reshaped many industries, causing them to lose market share or exit altogether. Some organisations are keen to embrace disruptive innovation to ensure that they are sustainable into the future, while others are only inclined to use known technologies to leverage economies of scale. The 4IR has already been around for a while and is moving at a fast pace. The level of readiness for the automotive assembler, Isuzu Motors South Africa (IMSAf), to take advantage of such technological changes brought by the 4IR, has not yet been measured. The primary objective of this study is to investigate IMSAf’s perceptions and readiness to embrace technological changes brought by the 4IR. The perceptions and readiness are assessed based on the technology embracing organisational framework of efficiencies, innovation, skills and re-training. This study is grounded in the philosophy of positivism and the related method used is a quantitative study to test the research questions in an objective manner. A questionnaire was the sole method of collecting first-hand data from the selected sample. The population size consisted of 139 respondents working in various business units within IMSAf. These individuals are occupying various roles and they have in depth, tacit, and multi-disciplinary knowledge of processes and would be the first to experience technological changes brought by the 4IR. A quantitative analysis technique is applied, such as descriptive and inferential statistics, to analyse data. A literature review on the topic was conducted as well as an empirical study. The results from both the literature review and the empirical study found that with the implementation of 4IR emerging technologies within an organisation, there is a significant improvement on efficiencies, innovation and skills and re-training. Furthermore, the level of awareness and understanding about the benefits of embracing 4IR emerging technologies within IMSAf is significant. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMU Business School, 2021
- Full Text: false
- Date Issued: 2021-04
The rights of children in youth care centres
- Authors: Ngodwana, Gugulethu
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Juvenile delinquents
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51193 , vital:43230
- Description: Poverty is prevalent in the Eastern Cape Province. As a result of poverty and other related factors, there is an increase on percentage of crime. There is a number of case laws where children have been found guilty of committing very serious criminal offences in the Eastern Cape. They are contributing high percentage in crime. In the past, before the dawn of the new constitutional dispensation, children in conflict with the law were not treated any different to adults who were in conflict with the law. There was no separate legislation that was child specific. , Thesis (LLM) -- Faculty of Laws, Criminal and Procedural Law, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Ngodwana, Gugulethu
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Juvenile delinquents
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51193 , vital:43230
- Description: Poverty is prevalent in the Eastern Cape Province. As a result of poverty and other related factors, there is an increase on percentage of crime. There is a number of case laws where children have been found guilty of committing very serious criminal offences in the Eastern Cape. They are contributing high percentage in crime. In the past, before the dawn of the new constitutional dispensation, children in conflict with the law were not treated any different to adults who were in conflict with the law. There was no separate legislation that was child specific. , Thesis (LLM) -- Faculty of Laws, Criminal and Procedural Law, 2021
- Full Text: false
- Date Issued: 2021-04
An anthropological investigation on academic performance of grade 12 learners: selected schools in King William’s Town, Eastern Cape
- Authors: Stuart, Sinaed
- Date: 2021-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54816 , vital:47910
- Description: The Eastern Cape is one of the poorest provinces in South Africa. The level of poverty, and lack of basic resources has given way to inadequacies in many of the services available to communities. From improper infrastructure, to a flawed or lacking public education system. Past and future research into the inadequacies and inequity that exists in the public education system need to act as a catalyst to policy changes, and intervention implementations to solve the issues that continue to persist. This study focuses on the factors that influence the academic performance of learners in matric in King Williams Town. The importance of this research is to investigate the issues that negatively impact on the performance of Grade 12 learners at Breidbach High School. Further, the importance of this study is to share the findings of the research with community members as well as the Department of Basic Education with the view and hope that they will address these issues. The research question is: What are the factors influencing academic performance of Grade 12 learners at Breidbach High School in Breidbach outside King Williams Town? The research objectives are as follows: to investigate and highlight factors associated with poor academic performance in the participating high school at Breidbach in King Williams Town, to contribute within the anthropology of education, adding to an already existing body of knowledge, with specific reference to the participating high school in King William’s Town and to come up with the recommendations with the view of addressing some of the challenges faced by the participating high school in King Williams Town. The study followed a qualitative approach which included various techniques and ethical compliance was adhered to. For the proposed study, the researcher will use ‘academic performance’ as a guideline for the conceptual framework. , Thesis (MA) -- Faculty of Humanities, Department of Sociology and Anthropology, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Stuart, Sinaed
- Date: 2021-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54816 , vital:47910
- Description: The Eastern Cape is one of the poorest provinces in South Africa. The level of poverty, and lack of basic resources has given way to inadequacies in many of the services available to communities. From improper infrastructure, to a flawed or lacking public education system. Past and future research into the inadequacies and inequity that exists in the public education system need to act as a catalyst to policy changes, and intervention implementations to solve the issues that continue to persist. This study focuses on the factors that influence the academic performance of learners in matric in King Williams Town. The importance of this research is to investigate the issues that negatively impact on the performance of Grade 12 learners at Breidbach High School. Further, the importance of this study is to share the findings of the research with community members as well as the Department of Basic Education with the view and hope that they will address these issues. The research question is: What are the factors influencing academic performance of Grade 12 learners at Breidbach High School in Breidbach outside King Williams Town? The research objectives are as follows: to investigate and highlight factors associated with poor academic performance in the participating high school at Breidbach in King Williams Town, to contribute within the anthropology of education, adding to an already existing body of knowledge, with specific reference to the participating high school in King William’s Town and to come up with the recommendations with the view of addressing some of the challenges faced by the participating high school in King Williams Town. The study followed a qualitative approach which included various techniques and ethical compliance was adhered to. For the proposed study, the researcher will use ‘academic performance’ as a guideline for the conceptual framework. , Thesis (MA) -- Faculty of Humanities, Department of Sociology and Anthropology, 2021
- Full Text:
- Date Issued: 2021-04
Nature conservation, protected areas and local communities : the Tsitsikamma National Park
- Authors: Le Fleur, Yvette Adele
- Date: 2021-04
- Subjects: National parks and reserves -- South Africa -- Eastern Cape , Protected areas -- Management , Programme of Work on Protected Areas , Human ecology -- South Africa -- Tsitsikamma , Nature conservation -- Citizen participation
- Language: English
- Type: thesis , text , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/177247 , vital:42803
- Description: Since the twentieth century, protected areas, usually in the form of nature reserves or national parks, have become increasingly more dominant as an international conservation strategy. An important factor in protected area management is the relationship between protected areas and its surrounding communities. Historically, the fortress conservation model based on the exclusion of human use and occupation prevailed in relation to protected areas. It is known that this approach brought with it many social and environmental injustices to local communities living in or adjacent to parks. However, a shift in conservation thinking occurred towards the end of the twentieth century, where it has increasingly been advocated for a more participatory approach in protected area management. South Africa has signed the international Convention on Biological Diversity that promotes a participatory approach to nature conservation, which is also reflected in the country’s national laws and policies. In relation to the literature and the lens of political ecology, this thesis sets out to assess in what ways and to what extent the participatory approach has been embraced by South Africa’s conservation authorities. As a case study, it looks at the Tsitsikamma National P ark ( incorporated into the larger Garden Route National Park). In order to get insight on h ow the participatory approach plays itself out at the T NP and what the nature of local communities’ relationship with the park is, this study looks at the aspects of (1) local communities’ socio-economic conditions, (2) their relationship with their natural environment, (3) their perception of nature conservation and (4) their perception of tourism. Then, taking all these aspects into account, (5) how local communities, in general, perceive their relationship with the p ark and its authorities. This study looked at the communities of Kurland, Nature’s Valley, Covie and Storms River. It shows in concurrence with other studies, that despite progressive laws and policies that express the intention of the South African state and SANParks to embrace the participatory approach, its implementation o n t he g round is riddled with challenges. , Thesis (MSocSc) -- Faculty of Humanities, Athropology, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Le Fleur, Yvette Adele
- Date: 2021-04
- Subjects: National parks and reserves -- South Africa -- Eastern Cape , Protected areas -- Management , Programme of Work on Protected Areas , Human ecology -- South Africa -- Tsitsikamma , Nature conservation -- Citizen participation
- Language: English
- Type: thesis , text , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/177247 , vital:42803
- Description: Since the twentieth century, protected areas, usually in the form of nature reserves or national parks, have become increasingly more dominant as an international conservation strategy. An important factor in protected area management is the relationship between protected areas and its surrounding communities. Historically, the fortress conservation model based on the exclusion of human use and occupation prevailed in relation to protected areas. It is known that this approach brought with it many social and environmental injustices to local communities living in or adjacent to parks. However, a shift in conservation thinking occurred towards the end of the twentieth century, where it has increasingly been advocated for a more participatory approach in protected area management. South Africa has signed the international Convention on Biological Diversity that promotes a participatory approach to nature conservation, which is also reflected in the country’s national laws and policies. In relation to the literature and the lens of political ecology, this thesis sets out to assess in what ways and to what extent the participatory approach has been embraced by South Africa’s conservation authorities. As a case study, it looks at the Tsitsikamma National P ark ( incorporated into the larger Garden Route National Park). In order to get insight on h ow the participatory approach plays itself out at the T NP and what the nature of local communities’ relationship with the park is, this study looks at the aspects of (1) local communities’ socio-economic conditions, (2) their relationship with their natural environment, (3) their perception of nature conservation and (4) their perception of tourism. Then, taking all these aspects into account, (5) how local communities, in general, perceive their relationship with the p ark and its authorities. This study looked at the communities of Kurland, Nature’s Valley, Covie and Storms River. It shows in concurrence with other studies, that despite progressive laws and policies that express the intention of the South African state and SANParks to embrace the participatory approach, its implementation o n t he g round is riddled with challenges. , Thesis (MSocSc) -- Faculty of Humanities, Athropology, 2021
- Full Text:
- Date Issued: 2021-04
An investigation of support services available for black female owners of bed & breakfasts in Makhanda
- Authors: Mdluli, Lukhona Silubonile
- Date: 2021-04
- Subjects: Bed and breakfast accommodations -- South Africa -- Makhanda , Businesspeople, Black -- South Africa -- Makhanda , Business enterprises, Black -- South Africa -- Makhanda , Women-owned business enterprises -- South Africa -- Makhanda , Government aid to small business -- South Africa , Small business -- South Africa -- Makhanda , Racism -- South Africa -- Makhanda , Businesswomen -- South Africa -- Makhanda
- Language: English
- Type: thesis , text , Masters , MBA
- Identifier: http://hdl.handle.net/10962/177181 , vital:42797
- Description: Over the last 26 years, the South African government has committed to SMME development. To do this, policies and support institutions were put in place which would create a favourable environment for SMME development. This was particularly important as after 1994, when the South African economy was re-integrated into global markets after years of having sanctions imposed against the country as a result of the apartheid system. The tourism industry was identified as one of the key economic drivers which would strengthen the economy and assist in job creation, especially since South Africa would be able to attract international tourists. Further, it created the opportunity for new participants to enter the industry, including black entrepreneurs who previously could not enter the industry as a result of the apartheid laws. The opening up of the country to international markets and the focus on the tourism industry also presented the opportunity for new forms of tourism to be explored including township tourism, which gave rise to the black-owned bed & breakfast sector. Over time, it has become evident that black entrepreneurs in this sector are facing a number of challenges, in spite of the pro-SMME policies and support institutions that are in place. Because this study seeks to investigate the support services available for black female bed & breakfast owners in Makhanda, a qualitative research approach using the interpretative theoretical framework was applied. By using semi-structured interview questions, to establish what challenges do black female bed and breakfast owners face the researcher was able to respond to the following; what participants identify as their needs; and whether they are able to access the support services that are made available by the Government. Results indicated that the majority of entrepreneurs have difficulty accessing funding to develop their businesses. The seasonality of Grahamstown/ Makhanda tourism businesses has its pros and cons for tourism entrepreneurs. Despite efforts by government to transform the tourism industry, black female entrepreneurs in this industry still experience a myriad of challenges, including passive racism. Insufficient institutional support and inaccessible support services for women have made it difficult to manage in this this environment. Thus, a recommendation is put forward for female focused entrepreneurship policy, which is more responsive in terms of a judicial and legal system(s) aimed at addressing women’s particular needs and challenges. , Thesis (MBA) -- Faculty of Commerce, Rhodes Business School, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Mdluli, Lukhona Silubonile
- Date: 2021-04
- Subjects: Bed and breakfast accommodations -- South Africa -- Makhanda , Businesspeople, Black -- South Africa -- Makhanda , Business enterprises, Black -- South Africa -- Makhanda , Women-owned business enterprises -- South Africa -- Makhanda , Government aid to small business -- South Africa , Small business -- South Africa -- Makhanda , Racism -- South Africa -- Makhanda , Businesswomen -- South Africa -- Makhanda
- Language: English
- Type: thesis , text , Masters , MBA
- Identifier: http://hdl.handle.net/10962/177181 , vital:42797
- Description: Over the last 26 years, the South African government has committed to SMME development. To do this, policies and support institutions were put in place which would create a favourable environment for SMME development. This was particularly important as after 1994, when the South African economy was re-integrated into global markets after years of having sanctions imposed against the country as a result of the apartheid system. The tourism industry was identified as one of the key economic drivers which would strengthen the economy and assist in job creation, especially since South Africa would be able to attract international tourists. Further, it created the opportunity for new participants to enter the industry, including black entrepreneurs who previously could not enter the industry as a result of the apartheid laws. The opening up of the country to international markets and the focus on the tourism industry also presented the opportunity for new forms of tourism to be explored including township tourism, which gave rise to the black-owned bed & breakfast sector. Over time, it has become evident that black entrepreneurs in this sector are facing a number of challenges, in spite of the pro-SMME policies and support institutions that are in place. Because this study seeks to investigate the support services available for black female bed & breakfast owners in Makhanda, a qualitative research approach using the interpretative theoretical framework was applied. By using semi-structured interview questions, to establish what challenges do black female bed and breakfast owners face the researcher was able to respond to the following; what participants identify as their needs; and whether they are able to access the support services that are made available by the Government. Results indicated that the majority of entrepreneurs have difficulty accessing funding to develop their businesses. The seasonality of Grahamstown/ Makhanda tourism businesses has its pros and cons for tourism entrepreneurs. Despite efforts by government to transform the tourism industry, black female entrepreneurs in this industry still experience a myriad of challenges, including passive racism. Insufficient institutional support and inaccessible support services for women have made it difficult to manage in this this environment. Thus, a recommendation is put forward for female focused entrepreneurship policy, which is more responsive in terms of a judicial and legal system(s) aimed at addressing women’s particular needs and challenges. , Thesis (MBA) -- Faculty of Commerce, Rhodes Business School, 2021
- Full Text:
- Date Issued: 2021-04
Modifcations to gravitational waves due to matter shells
- Authors: Naidoo, Monogaran
- Date: 2021-10-29
- Subjects: Gravitational waves , General relativity (Physics) , Einstein field equations , Cosmology , Matter shells
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/191118 , vital:45062 , 10.21504/10962/191119
- Description: As detections of gravitational waves (GWs) mount, the need to investigate various effects on the propagation of these waves from the time of emission until detection also grows. We investigate how a thin low density dust shell surrounding a gravitational wave source affects the propagation of GWs. The Bondi-Sachs (BS) formalism for the Einstein equations is used for the problem of a gravitational wave (GW) source surrounded by a spherical dust shell. Using linearised perturbation theory, we and the geometry of the regions exterior to, interior to and within the shell. We and that the dust shell causes the gravitational wave to be modified both in magnitude and phase, but without any energy being transferred to or from the dust. This finding is novel. In the context of cosmology, apart from the gravitational redshift, the effects are too small to be measurable; but the effect would be measurable if a GW event were to occur with a source surrounded by a massive shell and with the radius of the shell and the wavelength of the GWs of the same order. We extended our investigation to astrophysical scenarios such as binary black hole (BBH) mergers, binary neutron star (BNS) mergers, and core collapse supernovae (CCSNe). In these scenarios, instead of a monochromatic GW source, as we used in our initial investigation, we consider burst-like GW sources. The thin density shell approach is modified to include thick shells by considering concentric thin shells and integrating. Solutions are then found for these burst-like GW sources using Fourier transforms. We show that GW echoes that are claimed to be present in the Laser Interferometer Gravitational-Wave Observatory (LIGO) data of certain events, could not have been caused by a matter shell. We do and, however, that matter shells surrounding BBH mergers, BNS mergers, and CCSNe could make modifications of order a few percent to a GW signal. These modifications are expected to be measurable in GW data with current detectors if the event is close enough and at a detectable frequency; or in future detectors with increased frequency range and amplitude sensitivity. Substantial use is made of computer algebra in these investigations. In setting the scene for our investigations, we trace the evolution of general relativity (GR) from Einstein's postulation in 1915 to vindication of his theory with the confirmation of the existence of GWs a century later. We discuss the implications of our results to current and future considerations. Calculations of GWs, both analytical and numerical, have normally assumed their propagation from source to a detector on Earth in a vacuum spacetime, and so discounted the effect of intervening matter. As we enter an era of precision GW measurements, it becomes important to quantify any effects due to propagation of GWs through a non-vacuum spacetime Observational confirmation of the modification effect that we and in astrophysical scenarios involving black holes (BHs), neutron stars (NSs) and CCSNe, would also enhance our understanding of the details of the physics of these bodies. , Thesis (PhD) -- Faculty of Science, Mathematics (Pure and Applied), 2021
- Full Text:
- Date Issued: 2021-10-29
- Authors: Naidoo, Monogaran
- Date: 2021-10-29
- Subjects: Gravitational waves , General relativity (Physics) , Einstein field equations , Cosmology , Matter shells
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10962/191118 , vital:45062 , 10.21504/10962/191119
- Description: As detections of gravitational waves (GWs) mount, the need to investigate various effects on the propagation of these waves from the time of emission until detection also grows. We investigate how a thin low density dust shell surrounding a gravitational wave source affects the propagation of GWs. The Bondi-Sachs (BS) formalism for the Einstein equations is used for the problem of a gravitational wave (GW) source surrounded by a spherical dust shell. Using linearised perturbation theory, we and the geometry of the regions exterior to, interior to and within the shell. We and that the dust shell causes the gravitational wave to be modified both in magnitude and phase, but without any energy being transferred to or from the dust. This finding is novel. In the context of cosmology, apart from the gravitational redshift, the effects are too small to be measurable; but the effect would be measurable if a GW event were to occur with a source surrounded by a massive shell and with the radius of the shell and the wavelength of the GWs of the same order. We extended our investigation to astrophysical scenarios such as binary black hole (BBH) mergers, binary neutron star (BNS) mergers, and core collapse supernovae (CCSNe). In these scenarios, instead of a monochromatic GW source, as we used in our initial investigation, we consider burst-like GW sources. The thin density shell approach is modified to include thick shells by considering concentric thin shells and integrating. Solutions are then found for these burst-like GW sources using Fourier transforms. We show that GW echoes that are claimed to be present in the Laser Interferometer Gravitational-Wave Observatory (LIGO) data of certain events, could not have been caused by a matter shell. We do and, however, that matter shells surrounding BBH mergers, BNS mergers, and CCSNe could make modifications of order a few percent to a GW signal. These modifications are expected to be measurable in GW data with current detectors if the event is close enough and at a detectable frequency; or in future detectors with increased frequency range and amplitude sensitivity. Substantial use is made of computer algebra in these investigations. In setting the scene for our investigations, we trace the evolution of general relativity (GR) from Einstein's postulation in 1915 to vindication of his theory with the confirmation of the existence of GWs a century later. We discuss the implications of our results to current and future considerations. Calculations of GWs, both analytical and numerical, have normally assumed their propagation from source to a detector on Earth in a vacuum spacetime, and so discounted the effect of intervening matter. As we enter an era of precision GW measurements, it becomes important to quantify any effects due to propagation of GWs through a non-vacuum spacetime Observational confirmation of the modification effect that we and in astrophysical scenarios involving black holes (BHs), neutron stars (NSs) and CCSNe, would also enhance our understanding of the details of the physics of these bodies. , Thesis (PhD) -- Faculty of Science, Mathematics (Pure and Applied), 2021
- Full Text:
- Date Issued: 2021-10-29
A reflective multiple case study approach to understanding partner relationships within the context of community engagement at Rhodes University
- Authors: Bobo, Azola Benita Dorothea
- Date: 2021-05-06
- Subjects: Community development South Africa Makhanda , Community and college South Africa Makhanda , Community psychology South Africa Makhanda , Decolonization South Africa , Social action South Africa Makhanda , Transformative learning South Africa Makhanda , Rhodes University , Rhodes University Community Engagement (RUCE)
- Language: English
- Type: Doctoral thesis , text
- Identifier: http://hdl.handle.net/10962/253854 , vital:52406 , DOI 10.21504/10962/253854
- Description: Using a social constructivist approach, within the social action model of community psychology, this research interrogates the features of successful community engagement partnerships that exist within the context of higher education. It draws on the co-management model that the Rhodes University Community Engagement (RUCE) division proposes, where partnerships are seen to be mutually beneficial. This research further interrogates whether the principles of community engagement that RUCE propose play out in reality, and whether systems of power are deconstructed, in working towards more equitable engagements. Drawing on the Early Childhood Development (ECD) Residence Programme for case studies, this research used a reflective multiple case study design in attempting to answer the research question. Four partner groups (i.e., 4 community partners and 4 community engagement representatives) were selected for this research. Each participant was interviewed twice (with a 6-month time gap) and also participated in two focus group discussions. Thematic analysis was used to analyse the findings. In taking a social justice approach, it can be argued that RUCE has made strides towards forming collaborative partnerships based on the ethics of ubuntu and aspects of transformative learning, which may lead to the decolonisation of higher education. However, critical engagement with the research findings suggests that in many cases the principles that RUCE propose are aspirational. More work needs to be done with both students and community partners to develop the kinds of partnerships that RUCE aspires to. This research provides valuable insight into how carefully managed community engagement partnerships in higher education have the potential to contribute to the transformation agenda of higher education institutions, while promoting equitable societies. , Thesis (PhD) -- Faculty of Humanities, Psychology, 2022
- Full Text:
- Date Issued: 2021-05-06
- Authors: Bobo, Azola Benita Dorothea
- Date: 2021-05-06
- Subjects: Community development South Africa Makhanda , Community and college South Africa Makhanda , Community psychology South Africa Makhanda , Decolonization South Africa , Social action South Africa Makhanda , Transformative learning South Africa Makhanda , Rhodes University , Rhodes University Community Engagement (RUCE)
- Language: English
- Type: Doctoral thesis , text
- Identifier: http://hdl.handle.net/10962/253854 , vital:52406 , DOI 10.21504/10962/253854
- Description: Using a social constructivist approach, within the social action model of community psychology, this research interrogates the features of successful community engagement partnerships that exist within the context of higher education. It draws on the co-management model that the Rhodes University Community Engagement (RUCE) division proposes, where partnerships are seen to be mutually beneficial. This research further interrogates whether the principles of community engagement that RUCE propose play out in reality, and whether systems of power are deconstructed, in working towards more equitable engagements. Drawing on the Early Childhood Development (ECD) Residence Programme for case studies, this research used a reflective multiple case study design in attempting to answer the research question. Four partner groups (i.e., 4 community partners and 4 community engagement representatives) were selected for this research. Each participant was interviewed twice (with a 6-month time gap) and also participated in two focus group discussions. Thematic analysis was used to analyse the findings. In taking a social justice approach, it can be argued that RUCE has made strides towards forming collaborative partnerships based on the ethics of ubuntu and aspects of transformative learning, which may lead to the decolonisation of higher education. However, critical engagement with the research findings suggests that in many cases the principles that RUCE propose are aspirational. More work needs to be done with both students and community partners to develop the kinds of partnerships that RUCE aspires to. This research provides valuable insight into how carefully managed community engagement partnerships in higher education have the potential to contribute to the transformation agenda of higher education institutions, while promoting equitable societies. , Thesis (PhD) -- Faculty of Humanities, Psychology, 2022
- Full Text:
- Date Issued: 2021-05-06
An anthropological enquiry on the perceptions of adults on female sterilisation: a case of Gunguluza township
- Authors: Mbanjwa, Mpho
- Date: 2021-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54859 , vital:48085
- Description: The purpose of the study was to make an enquiry on the perceptions on female sterilisation adult participants, residing in Gunguluza Township, Uitenhage had. A qualitative research approach was used to collect the responses of 10 participants. These included eight women, one man and one traditional healer registered within the Traditional Healers Association of South Africa. The interviews had been semistructured with open-ended questions pre-set to help the researcher guide the conversation. Conversation analysis was the technique used to transform the information into research data that would attempt to answer the research question. The question this research attempted to answer was to form an understanding of how information and education resources provided by both Western and Traditional sources, including their availability and accessibility with regards to female sterilisation, as a form of contraception, have been understood, received and interpreted by adults residing in the research area of Gunguluza township. Gunguluza forms part of the area formally known as the Kwanobuhle 10 and Kwanobuhle 11 respectively. Some limitations, including limiting resources that resulted in only 10 participants being interviewed. The results had shown that participants had shown interest in acquiring more knowledge about female sterilisation and other reproductive health issues, in order to make informed decisions about their bodies, with contraceptive choice and use in particular. Most felt the need to engage with their partners about the choice of sterilisation largely due to the support they would need. With regard to traditional health as an alternative or interchangeable method of contraception, participants had very little knowledge of, with some expressing some importance and relevance in acquiring such knowledge, in a modern context. These findings came with sets of recommendations which placed an emphasis on the building of indigenous knowledge and its inclusion in formal spaces for open engagement and discussion. Traditional knowledge needed to be transferred from an oral to being documented into literature for future preservation and to eliminate any distortion. There was a gap for formal western medicine to collaborate or accommodate traditional medicine. The study made use of female sterilisation as a conceptual framework, with time and more future research could build and produce new theoretical understandings of the concept, from an Afrocentric context in particular. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Mbanjwa, Mpho
- Date: 2021-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54859 , vital:48085
- Description: The purpose of the study was to make an enquiry on the perceptions on female sterilisation adult participants, residing in Gunguluza Township, Uitenhage had. A qualitative research approach was used to collect the responses of 10 participants. These included eight women, one man and one traditional healer registered within the Traditional Healers Association of South Africa. The interviews had been semistructured with open-ended questions pre-set to help the researcher guide the conversation. Conversation analysis was the technique used to transform the information into research data that would attempt to answer the research question. The question this research attempted to answer was to form an understanding of how information and education resources provided by both Western and Traditional sources, including their availability and accessibility with regards to female sterilisation, as a form of contraception, have been understood, received and interpreted by adults residing in the research area of Gunguluza township. Gunguluza forms part of the area formally known as the Kwanobuhle 10 and Kwanobuhle 11 respectively. Some limitations, including limiting resources that resulted in only 10 participants being interviewed. The results had shown that participants had shown interest in acquiring more knowledge about female sterilisation and other reproductive health issues, in order to make informed decisions about their bodies, with contraceptive choice and use in particular. Most felt the need to engage with their partners about the choice of sterilisation largely due to the support they would need. With regard to traditional health as an alternative or interchangeable method of contraception, participants had very little knowledge of, with some expressing some importance and relevance in acquiring such knowledge, in a modern context. These findings came with sets of recommendations which placed an emphasis on the building of indigenous knowledge and its inclusion in formal spaces for open engagement and discussion. Traditional knowledge needed to be transferred from an oral to being documented into literature for future preservation and to eliminate any distortion. There was a gap for formal western medicine to collaborate or accommodate traditional medicine. The study made use of female sterilisation as a conceptual framework, with time and more future research could build and produce new theoretical understandings of the concept, from an Afrocentric context in particular. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-04
Workplace forums and the enhancement of collective bargaining
- Authors: Silo, Zama
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Collective bargaining--Law and legislation
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51189 , vital:43229
- Description: Historically, workers in South Africa, black and Africans in particular, fought against an oppressive regime and, in the absence of political rights, strikes were mostly violent. Labour legislation was based on racial categorisation and discrimination. There was parallel labour legislation for blacks, and a different one for whites. The legislation for blacks was called the Black Labour Relations Act 48 of 19531 , for whites it was called the Industrial Conciliation Act, it was later renamed the Labour Relations Act 28 of 19562 . Trade unions were racially divided, and black workers mostly were denied the right of joining trade unions. The unions that admitted blacks as members could not become parties to industrial councils. Before 1979, black workers in South Africa did not have access to the collective bargaining system. After that year, the guidelines proposed by the Wiehahn, Commission brought about certain changes. Attempts were made to establish independent labour organisations for black workers, but both the state and employers applied various strategies to undermine these organisations. One of these strategies was the Native Labour Settlement Disputes Act of 1953, which restricted the representation of black workers on worker committees in the workplace and prohibited them from striking. Black workers therefore never utilised these statutory works committees and by 1971, there were only 18 statutory works committees in the country. The Department of Labour indicated that there was a preference for non-statutory works committees because there were no restrictions in respect of their composition, and they provided a structure by means of which workers could be represented.3 Militant action by black labour in the early 1970s led to the promulgation of the Black Labour Relations Regulation Act of 1973.4 This Act was to extend the existing works committee system. Liaison and coordinating committees were set up to restrain activism among the workers and establish an alternative form for trade unions of labour management communication. Where statutory works committees had only consisted of employees, employers could now half the members of the new liaison committees and their chairman. The growth of these committees led to black workers building up a base for a future independent organisation. , Thesis (LLM) -- Faculty of Law, Mercantile Law, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Silo, Zama
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Collective bargaining--Law and legislation
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51189 , vital:43229
- Description: Historically, workers in South Africa, black and Africans in particular, fought against an oppressive regime and, in the absence of political rights, strikes were mostly violent. Labour legislation was based on racial categorisation and discrimination. There was parallel labour legislation for blacks, and a different one for whites. The legislation for blacks was called the Black Labour Relations Act 48 of 19531 , for whites it was called the Industrial Conciliation Act, it was later renamed the Labour Relations Act 28 of 19562 . Trade unions were racially divided, and black workers mostly were denied the right of joining trade unions. The unions that admitted blacks as members could not become parties to industrial councils. Before 1979, black workers in South Africa did not have access to the collective bargaining system. After that year, the guidelines proposed by the Wiehahn, Commission brought about certain changes. Attempts were made to establish independent labour organisations for black workers, but both the state and employers applied various strategies to undermine these organisations. One of these strategies was the Native Labour Settlement Disputes Act of 1953, which restricted the representation of black workers on worker committees in the workplace and prohibited them from striking. Black workers therefore never utilised these statutory works committees and by 1971, there were only 18 statutory works committees in the country. The Department of Labour indicated that there was a preference for non-statutory works committees because there were no restrictions in respect of their composition, and they provided a structure by means of which workers could be represented.3 Militant action by black labour in the early 1970s led to the promulgation of the Black Labour Relations Regulation Act of 1973.4 This Act was to extend the existing works committee system. Liaison and coordinating committees were set up to restrain activism among the workers and establish an alternative form for trade unions of labour management communication. Where statutory works committees had only consisted of employees, employers could now half the members of the new liaison committees and their chairman. The growth of these committees led to black workers building up a base for a future independent organisation. , Thesis (LLM) -- Faculty of Law, Mercantile Law, 2021
- Full Text: false
- Date Issued: 2021-04
Estimating activity patterns in camera trap studies, and the overlap between domestic and indigenous ungulates
- Authors: Peral, Christopher Michael
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Ungulates -- Behavior -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52019 , vital:43437
- Description: Animal activity can reveal responses to social and ecological factors such as the presence of food, water, shelter, predators, competitors or conspecifics. Thus, an understanding of an animal’s activity patterns provides insights into how and why they are using landscapes in the manner in which they do. Camera trap surveys, typically used to record the occurrence of species of interest, are also an efficient way to collect data regarding animal activity patterns but require robust analytical methods. The analysis of camera trap data requires assumptions that may differ for camera trap surveys that estimate occurrence or activity. One such assumption is temporal independence. This refers to the removal of images within a specified time interval, as these images are assumed to be images of the same individual. This assumption stems from the use of-time-to-independence in occurrence or density-based studies, where it reduces overestimation of animal counts. In studies of animal activity, this assumption is generally used, even though animal behaviour or activity occurs continuously over time and as such should be measured over time. I analysed 112 467 images of eight cooccurring species, to test the effect across various times to independence, these being set at 1, 5, 10, 15, 30 and 60 minutes. Time-to-independence resulted in significant loss of data and biased the interpretation of the activity patterns of species and interactions amongst species, particularly for herbivorous social species. In light of these findings, activity pattern estimates based on camera trap studies should be cautious when using time-to-independence. I then explore ‘habitat use’ in space and time by domestic and indigenous ungulates using a camera trap survey. Domestic ungulates (livestock) have become common place on rangelands and may compete with native species. It was hypothesised that there will be overlap in habitat use by livestock and indigenous ungulates. My results show that indigenous ungulate species, particularly larger species such as kudu (Tragelaphus strepsiceros) and springbok (Antidorcas marsupialis), changed their spatial and temporal use as a result of the presence of domestic ungulates. Other smaller indigenous ungulates, such as steenbok (Raphicerus campestris) and duiker (Sylvicapra grimmia), were less affected by the presence of livestock. Kudu were found to use more open habitats at different times whilst springbok used more dense habitats at different times in the presence of livestock. This supports the hypothesis of competition between livestock and indigenous ungulates. This study provides novel insight into the analysis and interpretation of activity patterns based on camera trap surveys. Additionally, this study demonstrates the competitive displacement between domestic and indigenous ungulate species. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Peral, Christopher Michael
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Ungulates -- Behavior -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52019 , vital:43437
- Description: Animal activity can reveal responses to social and ecological factors such as the presence of food, water, shelter, predators, competitors or conspecifics. Thus, an understanding of an animal’s activity patterns provides insights into how and why they are using landscapes in the manner in which they do. Camera trap surveys, typically used to record the occurrence of species of interest, are also an efficient way to collect data regarding animal activity patterns but require robust analytical methods. The analysis of camera trap data requires assumptions that may differ for camera trap surveys that estimate occurrence or activity. One such assumption is temporal independence. This refers to the removal of images within a specified time interval, as these images are assumed to be images of the same individual. This assumption stems from the use of-time-to-independence in occurrence or density-based studies, where it reduces overestimation of animal counts. In studies of animal activity, this assumption is generally used, even though animal behaviour or activity occurs continuously over time and as such should be measured over time. I analysed 112 467 images of eight cooccurring species, to test the effect across various times to independence, these being set at 1, 5, 10, 15, 30 and 60 minutes. Time-to-independence resulted in significant loss of data and biased the interpretation of the activity patterns of species and interactions amongst species, particularly for herbivorous social species. In light of these findings, activity pattern estimates based on camera trap studies should be cautious when using time-to-independence. I then explore ‘habitat use’ in space and time by domestic and indigenous ungulates using a camera trap survey. Domestic ungulates (livestock) have become common place on rangelands and may compete with native species. It was hypothesised that there will be overlap in habitat use by livestock and indigenous ungulates. My results show that indigenous ungulate species, particularly larger species such as kudu (Tragelaphus strepsiceros) and springbok (Antidorcas marsupialis), changed their spatial and temporal use as a result of the presence of domestic ungulates. Other smaller indigenous ungulates, such as steenbok (Raphicerus campestris) and duiker (Sylvicapra grimmia), were less affected by the presence of livestock. Kudu were found to use more open habitats at different times whilst springbok used more dense habitats at different times in the presence of livestock. This supports the hypothesis of competition between livestock and indigenous ungulates. This study provides novel insight into the analysis and interpretation of activity patterns based on camera trap surveys. Additionally, this study demonstrates the competitive displacement between domestic and indigenous ungulate species. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
- Full Text: false
- Date Issued: 2021-04
The application of the doctrine of common purpose to the joint possession of firearms
- Authors: Mnono, Zimbini
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Firearms--Law and legislation
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51197 , vital:43225
- Description: According to the South African criminal justice system, where two or more people in a joint unlawful enterprise associate to commit a crime with only one participant carrying a firearm, the principles of joint possession are used to secure successful prosecution of the participants for joint possession of the firearm. However, up to date, the State is yet to see a conviction based on the application of these principles. S v Khambule marks the first case in which the doctrine of common purpose was used to secure a conviction of multiple accused for the crime of joint possession of firearms. The case has become outdated law following the Supreme Court of Appeal decision in S v Mbuli where the court found that the doctrine could not be applied to circumstance crimes such as joint possession of firearms. Both cases have received enormous criticism from academics and in subsequent judgments. One main criticism relates to whether the failure to apply the doctrine of common purpose is consistent with the current law and constitutional freedoms, such as the right to be free from all forms of violence and the right to equal benefit of the law. The purpose of the dissertation is to evaluate the jurisprudence on the application of the doctrine of common purpose to the joint possession of firearms. The evaluation includes an analysis of the principles of joint possession in the context of constitutional rights as well as contributions made by academics such as Burchell. The commonpurpose doctrine does not extend to joint possession of firearms. This is as a result of firstly, the absence of causation from the definitional elements of the crime; secondly, the mental aspect of possession; thirdly, the principles of joint possession as the basis of liability for joint possession of firearms; and lastly due to the nature of the crime of joint possession of firearms, being a circumstance crime. The paper recommends the extension of the doctrine of common purpose to joint possession of firearms. The recommendation is based on the following arguments. Firstly, the mental aspect of possession relates to the description of the article and not fault. Secondly, the doctrine is and has always been intended to criminalise joint wrongdoings. Thirdly, the extension of the doctrine of common purpose to joint possession of firearms is consistent with the presumption of possession in terms of the Firearm Controls Act. Lastly, the expansion enhances constitutional rights and fulfils the duty of the State to make South Africa less vulnerable to firearms. , Thesis (LLM) -- Faculty of Law, Criminal and Procedural Law, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Mnono, Zimbini
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Firearms--Law and legislation
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51197 , vital:43225
- Description: According to the South African criminal justice system, where two or more people in a joint unlawful enterprise associate to commit a crime with only one participant carrying a firearm, the principles of joint possession are used to secure successful prosecution of the participants for joint possession of the firearm. However, up to date, the State is yet to see a conviction based on the application of these principles. S v Khambule marks the first case in which the doctrine of common purpose was used to secure a conviction of multiple accused for the crime of joint possession of firearms. The case has become outdated law following the Supreme Court of Appeal decision in S v Mbuli where the court found that the doctrine could not be applied to circumstance crimes such as joint possession of firearms. Both cases have received enormous criticism from academics and in subsequent judgments. One main criticism relates to whether the failure to apply the doctrine of common purpose is consistent with the current law and constitutional freedoms, such as the right to be free from all forms of violence and the right to equal benefit of the law. The purpose of the dissertation is to evaluate the jurisprudence on the application of the doctrine of common purpose to the joint possession of firearms. The evaluation includes an analysis of the principles of joint possession in the context of constitutional rights as well as contributions made by academics such as Burchell. The commonpurpose doctrine does not extend to joint possession of firearms. This is as a result of firstly, the absence of causation from the definitional elements of the crime; secondly, the mental aspect of possession; thirdly, the principles of joint possession as the basis of liability for joint possession of firearms; and lastly due to the nature of the crime of joint possession of firearms, being a circumstance crime. The paper recommends the extension of the doctrine of common purpose to joint possession of firearms. The recommendation is based on the following arguments. Firstly, the mental aspect of possession relates to the description of the article and not fault. Secondly, the doctrine is and has always been intended to criminalise joint wrongdoings. Thirdly, the extension of the doctrine of common purpose to joint possession of firearms is consistent with the presumption of possession in terms of the Firearm Controls Act. Lastly, the expansion enhances constitutional rights and fulfils the duty of the State to make South Africa less vulnerable to firearms. , Thesis (LLM) -- Faculty of Law, Criminal and Procedural Law, 2021
- Full Text: false
- Date Issued: 2021-04
A Systematic Visualisation Framework for Radio-Imaging Pipelines
- Authors: Andati, Lexy Acherwa Livoyi
- Date: 2021-04
- Subjects: Radio interferometers , Radio astronomy -- Data processing , Radio astronomy -- Data processing -- Software , Jupyter
- Language: English
- Type: thesis , text , Masters , MSc
- Identifier: http://hdl.handle.net/10962/177338 , vital:42812
- Description: Pipelines for calibration and imaging of radio interferometric data produce many intermediate images and other data products (gain tables, etc.) These often contain valuable information about the quality of the data and the calibration, and can provide the user with valuable insights, if only visualised in the right way. However, the deluge of data that we’re experiencing with modern instruments means that most of these products are never looked at, and only the final images and data products are examined. Furthermore, the variety of imaging algorithms currently available, and the range of their options, means that very different results can be produced from the same set of original data. Proper understanding of this requires a systematic comparison that can be carried out both by individual users locally, and by the community globally. We address both problems by developing a systematic visualisation framework based around Jupyter notebooks, enriched with interactive plots based on the Bokeh and Datashader visualisation libraries. , Thesis (MSc) -- Faculty of Science, Department of Physics and Electronics, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Andati, Lexy Acherwa Livoyi
- Date: 2021-04
- Subjects: Radio interferometers , Radio astronomy -- Data processing , Radio astronomy -- Data processing -- Software , Jupyter
- Language: English
- Type: thesis , text , Masters , MSc
- Identifier: http://hdl.handle.net/10962/177338 , vital:42812
- Description: Pipelines for calibration and imaging of radio interferometric data produce many intermediate images and other data products (gain tables, etc.) These often contain valuable information about the quality of the data and the calibration, and can provide the user with valuable insights, if only visualised in the right way. However, the deluge of data that we’re experiencing with modern instruments means that most of these products are never looked at, and only the final images and data products are examined. Furthermore, the variety of imaging algorithms currently available, and the range of their options, means that very different results can be produced from the same set of original data. Proper understanding of this requires a systematic comparison that can be carried out both by individual users locally, and by the community globally. We address both problems by developing a systematic visualisation framework based around Jupyter notebooks, enriched with interactive plots based on the Bokeh and Datashader visualisation libraries. , Thesis (MSc) -- Faculty of Science, Department of Physics and Electronics, 2021
- Full Text:
- Date Issued: 2021-04
Barriers and reasons for exercise of rural and urban overweight and obese populations in Buffalo City Metropolitan Municipality, Eastern Cape
- Authors: Mrwebi, Thembani
- Date: 2021-04
- Subjects: Obesity--Prevention , Public health--Exercise
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22522 , vital:52388
- Description: It is documented that obesity is highly prevalent across rural and urban groups in industrialised and underdeveloped countries. This problem is an alarming issue as community members remain unsure about avoiding risking their health. Various health surveys reveal that obesity has increased among communities in the Buffalo City Metro Municipality in the Eastern Cape, and it has consequently made communities vulnerable to non-communicable diseases. The researcher explored factors and barriers of exercise for rural and urban obese populations in Buffalo City Metropolitan Municipality, Eastern Cape. This study was descriptive and explorative, utilising a questionnaire for gathering information. A purposive sample of 80 members from the two selected communities completed the questionnaire. A factor analysis was performed to identify factors that motivate physical activity and barriers to physical activity. It was discovered that all evaluated members were fully aware of the harmful repercussions of being overweight or obese. Nevertheless, only a tiny percentage of those who took part in the study decided to live a healthier lifestyle because of their obesity. Constructive motivating factors included increasing their self-image, enhancing their wellbeing, and getting highly involved in active and regular exercise. Negative motivators included finding it challenging to fit into old clothes and the worry of developing obesity-related diseases. Respondents noted the following impediments in regular exercises and physical activities; African cultural values, limited operational hours of physical activity facilities, insufficient time, and a lack of enthusiasm. , Thesis (MPhil) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Mrwebi, Thembani
- Date: 2021-04
- Subjects: Obesity--Prevention , Public health--Exercise
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22522 , vital:52388
- Description: It is documented that obesity is highly prevalent across rural and urban groups in industrialised and underdeveloped countries. This problem is an alarming issue as community members remain unsure about avoiding risking their health. Various health surveys reveal that obesity has increased among communities in the Buffalo City Metro Municipality in the Eastern Cape, and it has consequently made communities vulnerable to non-communicable diseases. The researcher explored factors and barriers of exercise for rural and urban obese populations in Buffalo City Metropolitan Municipality, Eastern Cape. This study was descriptive and explorative, utilising a questionnaire for gathering information. A purposive sample of 80 members from the two selected communities completed the questionnaire. A factor analysis was performed to identify factors that motivate physical activity and barriers to physical activity. It was discovered that all evaluated members were fully aware of the harmful repercussions of being overweight or obese. Nevertheless, only a tiny percentage of those who took part in the study decided to live a healthier lifestyle because of their obesity. Constructive motivating factors included increasing their self-image, enhancing their wellbeing, and getting highly involved in active and regular exercise. Negative motivators included finding it challenging to fit into old clothes and the worry of developing obesity-related diseases. Respondents noted the following impediments in regular exercises and physical activities; African cultural values, limited operational hours of physical activity facilities, insufficient time, and a lack of enthusiasm. , Thesis (MPhil) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-04
The role of strategic leadership in strategy implementation: a case of the Eastern Cape Department of Health
- Authors: Nkosi, Nonhlanhla
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53021 , vital:44882
- Description: The goal of this research was to evaluate the role of strategic leadership in improving strategy implementation in the Eastern Cape Department of Health (ECDOH). According to literature, the strategic leadership actions, namely: determining strategic direction; managing the organisation’s resource portfolio; sustaining an effective organisational culture; emphasising ethical practices; and establishing balanced organisational controls, positively contribute to successful implementation of strategy. The research methodology used in this study was a quantitative research approach. The study used an online survey questionnaire to gather information on the respondents’ perceptions on the role of the strategic leadership actions in strategy implementation in the ECDOH. The survey also gathered respondents’ perceptions on the role of environmental complexity factors in moderating the relationship between the strategic leadership actions and strategy implementation in the ECDOH. The study revealed that determining strategic direction and establishing balanced organisational controls were positively related to strategy implementation in the ECDOH. Managing the organisation’s resource portfolio, sustaining an effective organisational culture as well as emphasising ethical practices were not positively related to strategy implementation in the ECDOH. The study also found that four out of the five environmental complexity factors measured, moderate the relationship between strategic leadership actions and strategy implementation in the ECDOH. Based on the findings, the study recommends that the ECDOH management apply all the strategic leadership actions in improving strategy implementation in the ECDOH and provides detailed recommendations per strategic leadership action. The study also recommends that the ECDOH management take note of the environmental complexity factors that moderate the relationship between the role of strategic leadership actions in the implementation of strategy in the ECDOH and develop plans to mitigate against the risk of these environmental complexity factors. , Thesis (MBA) -- Faculty of Business and Economic Science, NMU Business School, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Nkosi, Nonhlanhla
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53021 , vital:44882
- Description: The goal of this research was to evaluate the role of strategic leadership in improving strategy implementation in the Eastern Cape Department of Health (ECDOH). According to literature, the strategic leadership actions, namely: determining strategic direction; managing the organisation’s resource portfolio; sustaining an effective organisational culture; emphasising ethical practices; and establishing balanced organisational controls, positively contribute to successful implementation of strategy. The research methodology used in this study was a quantitative research approach. The study used an online survey questionnaire to gather information on the respondents’ perceptions on the role of the strategic leadership actions in strategy implementation in the ECDOH. The survey also gathered respondents’ perceptions on the role of environmental complexity factors in moderating the relationship between the strategic leadership actions and strategy implementation in the ECDOH. The study revealed that determining strategic direction and establishing balanced organisational controls were positively related to strategy implementation in the ECDOH. Managing the organisation’s resource portfolio, sustaining an effective organisational culture as well as emphasising ethical practices were not positively related to strategy implementation in the ECDOH. The study also found that four out of the five environmental complexity factors measured, moderate the relationship between strategic leadership actions and strategy implementation in the ECDOH. Based on the findings, the study recommends that the ECDOH management apply all the strategic leadership actions in improving strategy implementation in the ECDOH and provides detailed recommendations per strategic leadership action. The study also recommends that the ECDOH management take note of the environmental complexity factors that moderate the relationship between the role of strategic leadership actions in the implementation of strategy in the ECDOH and develop plans to mitigate against the risk of these environmental complexity factors. , Thesis (MBA) -- Faculty of Business and Economic Science, NMU Business School, 2021
- Full Text: false
- Date Issued: 2021-04
Linking agrochemical pollution with the aquatic ecological integrity of the Twee River Catchment, Western Cape
- Authors: Brink, Zanné
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Ecological integrity
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52326 , vital:43588
- Description: This study was initiated in the Twee River system due to the threat posed by agrochemicals on the occurrence of the endemic and endangered fish species found within the catchment. Poor knowledge and understanding of the environmental effects of fertilizers, pesticides and other agrochemicals among small and large commercial farmers within the study area, in combination with their intensive use may have resulted in chemical contamination above environmentally safe concentrations. Numerous studies have highlighted the fact that more research needs to be conducted to identify the key threats to the continued existence of specifically the Critically Endangered Sedercypris erubescens. The overall aim of this study was to determine the spatial and temporal patterns in aquatic ecosystem diversity in the Twee River catchment as indicated by macroinvertebrate and native fish distribution and abundance. It was further investigated if there was a link between agrochemical pollution and the aquatic ecological integrity of the Twee River catchment. Selected sampling sites were identified and sampled to determine the presence and concentration of pesticides entering the water of the Twee River system during run-off and event-based spraying. Furthermore, the effect of these pesticides on the distribution and abundance of the aquatic biota were determined using SASS5 for the macroinvertebrate populations and visually sampling the distribution of the native and non-native fish in the Twee River catchment. This study supports suggestions made by previous studies, that sub-lethal to lethal concentrations of insecticides could be a threat to the long-term survival of benthic macroinvertebrates and potentially the more sensitive endemic fish species within the Twee River system. More focussed research is needed to address impacts of pesticides within this catchment. Agricultural and conservation efforts should be aimed at developing of a shared vision amongst stakeholders, to allow for the longterm conservation of the endemic fish of the Twee River. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Brink, Zanné
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Ecological integrity
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52326 , vital:43588
- Description: This study was initiated in the Twee River system due to the threat posed by agrochemicals on the occurrence of the endemic and endangered fish species found within the catchment. Poor knowledge and understanding of the environmental effects of fertilizers, pesticides and other agrochemicals among small and large commercial farmers within the study area, in combination with their intensive use may have resulted in chemical contamination above environmentally safe concentrations. Numerous studies have highlighted the fact that more research needs to be conducted to identify the key threats to the continued existence of specifically the Critically Endangered Sedercypris erubescens. The overall aim of this study was to determine the spatial and temporal patterns in aquatic ecosystem diversity in the Twee River catchment as indicated by macroinvertebrate and native fish distribution and abundance. It was further investigated if there was a link between agrochemical pollution and the aquatic ecological integrity of the Twee River catchment. Selected sampling sites were identified and sampled to determine the presence and concentration of pesticides entering the water of the Twee River system during run-off and event-based spraying. Furthermore, the effect of these pesticides on the distribution and abundance of the aquatic biota were determined using SASS5 for the macroinvertebrate populations and visually sampling the distribution of the native and non-native fish in the Twee River catchment. This study supports suggestions made by previous studies, that sub-lethal to lethal concentrations of insecticides could be a threat to the long-term survival of benthic macroinvertebrates and potentially the more sensitive endemic fish species within the Twee River system. More focussed research is needed to address impacts of pesticides within this catchment. Agricultural and conservation efforts should be aimed at developing of a shared vision amongst stakeholders, to allow for the longterm conservation of the endemic fish of the Twee River. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
- Full Text: false
- Date Issued: 2021-04
The concurrent jurisdiction of the high court and labour court
- Authors: Beyleveld, Dominique
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Labor laws and legislation--South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51191 , vital:43218
- Description: The words “concurrent jurisdiction” essentially means that there is more than one court which has the power to hear a matter and therefore, a party may choose which forum to approach.1 The High Court (hereinafter referred to as “HC”) may exercise jurisdiction, together with the Labour Court (hereinafter referred to as “LC”), in enforcing purely contractual and other common law claims as well as for breach of fundamental rights to which the Labour Relations Act (LRA)2 (or other labour statutes) do not give effect to.3 However, this is not without limitations. The HC and the LC have concurrent jurisdiction over claims relating to the lawfulness of dismissal or other conduct by the parties, whereas all claims based on fairness falls within the exclusive jurisdiction of the LC.4 The practical implication of the approach taken by the Constitutional Court (hereinafter referred to as “CC”)5 is that jurisdiction may, to a certain extent,6 be based on the pleadings, and a litigant may in fact have simultaneous claims arising from the same circumstances.7 However, where the basis of the action and the relief sought is clearly identifiable as being part of the machinery of the Labour Relations Act (hereinafter referred to as the “LRA”) or other labour legislation, then the HC will not have jurisdiction and it is up to the LC to remedy the wrong and give effect to the primary objects of the LRA , Thesis (LLM) -- Faculty of Law, Mercantile Law, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Beyleveld, Dominique
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Labor laws and legislation--South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/51191 , vital:43218
- Description: The words “concurrent jurisdiction” essentially means that there is more than one court which has the power to hear a matter and therefore, a party may choose which forum to approach.1 The High Court (hereinafter referred to as “HC”) may exercise jurisdiction, together with the Labour Court (hereinafter referred to as “LC”), in enforcing purely contractual and other common law claims as well as for breach of fundamental rights to which the Labour Relations Act (LRA)2 (or other labour statutes) do not give effect to.3 However, this is not without limitations. The HC and the LC have concurrent jurisdiction over claims relating to the lawfulness of dismissal or other conduct by the parties, whereas all claims based on fairness falls within the exclusive jurisdiction of the LC.4 The practical implication of the approach taken by the Constitutional Court (hereinafter referred to as “CC”)5 is that jurisdiction may, to a certain extent,6 be based on the pleadings, and a litigant may in fact have simultaneous claims arising from the same circumstances.7 However, where the basis of the action and the relief sought is clearly identifiable as being part of the machinery of the Labour Relations Act (hereinafter referred to as the “LRA”) or other labour legislation, then the HC will not have jurisdiction and it is up to the LC to remedy the wrong and give effect to the primary objects of the LRA , Thesis (LLM) -- Faculty of Law, Mercantile Law, 2021
- Full Text: false
- Date Issued: 2021-04
Investigating financing options for business success
- Authors: Vena, Sindile
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53002 , vital:44908
- Description: The study sought to examine the extent to which the financing options chosen by entrepreneurs will have an impact on business success. The investigator adopted the progression of the ventures along the business life cycle stages as a benchmark for assessing success. The study focused primarily on small, medium and micro enterprises (SMMEs) in the Eastern Cape Information Communication Technologies (ICT) sector. An empirical study, using an online survey was conducted amongst 50 small business owners/ business representative within the ICT sector in the Eastern Cape Province. Key results revealed that the financial support of Broad-Based Black Economic Empowerment (BBBEE) and personal savings have played a key role in the success of ICT SMMEs throughout the business life cycle phases. This occurs after an ICT SMME has advanced successfully over the startup stage and aims for success in the development phase. The empirical finding revealed that for these SMMEs to attain success at this stage, they should finance their business investment projects utilising financing and credit trade in the form of bank loans, families, relatives and friends. According to the empirical finding in chapter five, the abovementioned financing options are only substantially linked to good advancement from the development phase onto the expansion phase. In addition, suggestions have been made to the ICT SMME management to include BBBEE finance, personal savings, bank loans, families, relatives and friends and trade credit as suitable funding choices for the ICT SMME's life cycle. The recommendations made included that proponents of the BBBEE legislation underpinning the enterprise development and supplier development, should intentionally pressure the private sector to comply with this legislation, as compliance will increase the pool of capital available to SMMEs.The chances of receiving these forms of support would therefore improve the probabilites of sucess for ICT SMMEs. Moreover, personal financing is crucial to successful progress for ICT SMMEs along the business life cycle. It is recommended that startup owners should always exercise iv saving in their personal capacity. In the early stages, the owner's capital will still be valuable as "seed financing" for start-up businesses., when all the other options of external funding are not available. Moreover, SMMEs should continuously explore the other financing options, such as bank loans, families, relatives and friends and trade credit only when their business goals are achieving success at the development stage. The study calls upon academia to consider performing descriptive studies to look at these findings. Through setting a concise financing approach for SMMEs in the ICT sector, SMMEs may help to close the distance between themselves and access to various financing options and supportive organisations. , Thesis (MA) -- Faculty of Business and Economic Sciences, NMU Business School, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Vena, Sindile
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53002 , vital:44908
- Description: The study sought to examine the extent to which the financing options chosen by entrepreneurs will have an impact on business success. The investigator adopted the progression of the ventures along the business life cycle stages as a benchmark for assessing success. The study focused primarily on small, medium and micro enterprises (SMMEs) in the Eastern Cape Information Communication Technologies (ICT) sector. An empirical study, using an online survey was conducted amongst 50 small business owners/ business representative within the ICT sector in the Eastern Cape Province. Key results revealed that the financial support of Broad-Based Black Economic Empowerment (BBBEE) and personal savings have played a key role in the success of ICT SMMEs throughout the business life cycle phases. This occurs after an ICT SMME has advanced successfully over the startup stage and aims for success in the development phase. The empirical finding revealed that for these SMMEs to attain success at this stage, they should finance their business investment projects utilising financing and credit trade in the form of bank loans, families, relatives and friends. According to the empirical finding in chapter five, the abovementioned financing options are only substantially linked to good advancement from the development phase onto the expansion phase. In addition, suggestions have been made to the ICT SMME management to include BBBEE finance, personal savings, bank loans, families, relatives and friends and trade credit as suitable funding choices for the ICT SMME's life cycle. The recommendations made included that proponents of the BBBEE legislation underpinning the enterprise development and supplier development, should intentionally pressure the private sector to comply with this legislation, as compliance will increase the pool of capital available to SMMEs.The chances of receiving these forms of support would therefore improve the probabilites of sucess for ICT SMMEs. Moreover, personal financing is crucial to successful progress for ICT SMMEs along the business life cycle. It is recommended that startup owners should always exercise iv saving in their personal capacity. In the early stages, the owner's capital will still be valuable as "seed financing" for start-up businesses., when all the other options of external funding are not available. Moreover, SMMEs should continuously explore the other financing options, such as bank loans, families, relatives and friends and trade credit only when their business goals are achieving success at the development stage. The study calls upon academia to consider performing descriptive studies to look at these findings. Through setting a concise financing approach for SMMEs in the ICT sector, SMMEs may help to close the distance between themselves and access to various financing options and supportive organisations. , Thesis (MA) -- Faculty of Business and Economic Sciences, NMU Business School, 2021
- Full Text: false
- Date Issued: 2021-04
The Influence of Clientelism on the Informal Sector in Zimbabwe : a Case Study of Glen View 8 Complex, Harare
- Authors: Tandire, Justin
- Date: 2021-04
- Subjects: Patron and client -- Zimbabwe -- Harare , Informal sector (Economics) -- Zimbabwe -- Harare , Informal sector (Economics) -- Political aspects -- Zimbabwe -- Harare , Patronage, Political -- Zimbabwe -- Harare , ZANU-PF (Organization : Zimbabwe) , Zimbabwe -- Social conditions , Glen View Complex 8 (Zimbabwe)
- Language: English
- Type: thesis , text , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/177986 , vital:42896 , 10.21504/10962/177986
- Description: This study focuses on the influence of clientelism in the informal sector of Zimbabwe in Glen View 8 (Complex). The study used the case of Glen view 8 (complex) in Harare Province. The study focused on political dynamics in the informal sector; livelihood strategies employed by informal sector operators; manifestation of “Big Men”, social networks in the informal sector; and different strategies employed by operators to overcome the problems of political manipulation, clientelism and patronage. It employs a qualitative research methodology to enable a nuanced comprehension of the clientelistic relationships that take place in the informal sector of Zimbabwe. Through in-depth interviews, focus group discussions, narratives and in-depth interviews with key informants, the study explored the clientelistic nature of the informal sector. The major findings of the study are that the informal sector in Zimbabwe is influenced by political patronage. It was established that patronage influences the informal sector in Zimbabwe in general and at Glen View Complex 8 in particular. Some of the operators revealed that patronage negatively affects their business as they are sometimes forced to attend political party meetings either at the complex or at ZANU-PF star rallies in town. The operators experience a plethora of problems such as lack of security, poor sanitation, stiff competition, poor infrastructure, lack of insurance and fire outbreaks. It has been revealed that most of the problems experienced at the complex are a result of the politicisation of the informal sector particularly by the ZANU-PF party. Operators at the complex have described the politicisation of the informal sector as a major drawback to their efforts of realising maximum benefits from their work. Therefore, the thrust of this thesis is premised on the de-politicisation of the informal sector as the starting point in the transformation of the activities of the operators. , Thesis (PhD) -- Faculty of Humanities, Sociology, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Tandire, Justin
- Date: 2021-04
- Subjects: Patron and client -- Zimbabwe -- Harare , Informal sector (Economics) -- Zimbabwe -- Harare , Informal sector (Economics) -- Political aspects -- Zimbabwe -- Harare , Patronage, Political -- Zimbabwe -- Harare , ZANU-PF (Organization : Zimbabwe) , Zimbabwe -- Social conditions , Glen View Complex 8 (Zimbabwe)
- Language: English
- Type: thesis , text , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/177986 , vital:42896 , 10.21504/10962/177986
- Description: This study focuses on the influence of clientelism in the informal sector of Zimbabwe in Glen View 8 (Complex). The study used the case of Glen view 8 (complex) in Harare Province. The study focused on political dynamics in the informal sector; livelihood strategies employed by informal sector operators; manifestation of “Big Men”, social networks in the informal sector; and different strategies employed by operators to overcome the problems of political manipulation, clientelism and patronage. It employs a qualitative research methodology to enable a nuanced comprehension of the clientelistic relationships that take place in the informal sector of Zimbabwe. Through in-depth interviews, focus group discussions, narratives and in-depth interviews with key informants, the study explored the clientelistic nature of the informal sector. The major findings of the study are that the informal sector in Zimbabwe is influenced by political patronage. It was established that patronage influences the informal sector in Zimbabwe in general and at Glen View Complex 8 in particular. Some of the operators revealed that patronage negatively affects their business as they are sometimes forced to attend political party meetings either at the complex or at ZANU-PF star rallies in town. The operators experience a plethora of problems such as lack of security, poor sanitation, stiff competition, poor infrastructure, lack of insurance and fire outbreaks. It has been revealed that most of the problems experienced at the complex are a result of the politicisation of the informal sector particularly by the ZANU-PF party. Operators at the complex have described the politicisation of the informal sector as a major drawback to their efforts of realising maximum benefits from their work. Therefore, the thrust of this thesis is premised on the de-politicisation of the informal sector as the starting point in the transformation of the activities of the operators. , Thesis (PhD) -- Faculty of Humanities, Sociology, 2021
- Full Text:
- Date Issued: 2021-04
Observations of cosmic re-ionisation with the Hydrogen Epoch of Reionization Array: simulations of closure phase spectra
- Authors: Charles, Ntsikelelo
- Date: 2021-04
- Subjects: Epoch of reionization , Space interferometry , Astronomy -- Observations , Closure phase spectra
- Language: English
- Type: thesis , text , Masters , MSc
- Identifier: http://hdl.handle.net/10962/174470 , vital:42480
- Description: The 21 cm transition from neutral Hydrogen promises to be the best observational probe of the Epoch of Reionisation. It has driven the construction of the new generation of low frequency radio interferometric arrays, including the Hydrogen Epoch of Reionization Array (HERA). The main difficulty in measuring the 21 cm signal is the presence of bright foregrounds that require very accurate interferometric calibration. Thyagarajan et al. (2018) proposed the use of closure phase quantities as a means to detect the 21 cm signal, which has the advantage of being independent (to first order) from calibration errors and therefore, bypasses the need for accurate calibration. Closure phases are, however, affected by so-called direction dependent effects, e.g. the fact that the dishes - or antennas - of an interferometric array are not identical to each other and , therefore, yield different antenna primary beam responses. In this thesis, we investigate the impact of direction dependent effects on closure quantities and simulate the impact that primary antenna beams affected by mutual coupling have on the foreground closure phase and its power spectrum i.e. the power spectrum of the bispectrum phase (Thyagarajan et al., 2020). Our simulations show that primary beams affected by mutual coupling lead to an overall leakage of foreground power in the so-called EoR window, i.e. power from smooth-spectrum foregrounds is confined to low k modes. We quantified this effect and found that the leakage is up to ~ 8 orders magnitude higher than the case of an ideal beam at kǁ > 0:5 h Mpc-1. We also found that the foreground leakage is worse when edge antennas are included, as they have a more different primary beam compared to antennas at the centre of the array. The leakage magnitude is worse when bright foregrounds appear in the antenna sidelobes, as expected. Our simulations provide a useful framework to interpret observations and assess which power spectrum region is expected to be most contaminated by foreground power leakage.
- Full Text:
- Date Issued: 2021-04
- Authors: Charles, Ntsikelelo
- Date: 2021-04
- Subjects: Epoch of reionization , Space interferometry , Astronomy -- Observations , Closure phase spectra
- Language: English
- Type: thesis , text , Masters , MSc
- Identifier: http://hdl.handle.net/10962/174470 , vital:42480
- Description: The 21 cm transition from neutral Hydrogen promises to be the best observational probe of the Epoch of Reionisation. It has driven the construction of the new generation of low frequency radio interferometric arrays, including the Hydrogen Epoch of Reionization Array (HERA). The main difficulty in measuring the 21 cm signal is the presence of bright foregrounds that require very accurate interferometric calibration. Thyagarajan et al. (2018) proposed the use of closure phase quantities as a means to detect the 21 cm signal, which has the advantage of being independent (to first order) from calibration errors and therefore, bypasses the need for accurate calibration. Closure phases are, however, affected by so-called direction dependent effects, e.g. the fact that the dishes - or antennas - of an interferometric array are not identical to each other and , therefore, yield different antenna primary beam responses. In this thesis, we investigate the impact of direction dependent effects on closure quantities and simulate the impact that primary antenna beams affected by mutual coupling have on the foreground closure phase and its power spectrum i.e. the power spectrum of the bispectrum phase (Thyagarajan et al., 2020). Our simulations show that primary beams affected by mutual coupling lead to an overall leakage of foreground power in the so-called EoR window, i.e. power from smooth-spectrum foregrounds is confined to low k modes. We quantified this effect and found that the leakage is up to ~ 8 orders magnitude higher than the case of an ideal beam at kǁ > 0:5 h Mpc-1. We also found that the foreground leakage is worse when edge antennas are included, as they have a more different primary beam compared to antennas at the centre of the array. The leakage magnitude is worse when bright foregrounds appear in the antenna sidelobes, as expected. Our simulations provide a useful framework to interpret observations and assess which power spectrum region is expected to be most contaminated by foreground power leakage.
- Full Text:
- Date Issued: 2021-04