A seismic characterization of the crustal structure underlying the offshore Natal valley within the south-west Indian Ocean
- Authors: Moorcroft, David
- Date: 2018
- Subjects: Seismology , Seismology -- Kwa Zulu Natal -- Research Coasts -- Kwa Zulu Natal
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/22387 , vital:29965
- Description: The Natal Valley is a ~1000 km long, elongated depression in the seafloor, located within the south-west Indian Ocean, between the coastline of south-east Africa and the offshore aseismic Mozambique Ridge. Knowledge of its present-day crustal structure is important to reconstruct the Gondwana supercontinent break-up history and the concurrent opening of the Indian Ocean, which started during the Jurassic, some ~180 – 150 million years ago. Major geological events relating to this supercontinent break-up including continental rifting, magmatism, the emplacement of extensive oceanic flood basalt as submarine plateaus, vertical processes associated with tectonic uplift, flexural subsidence of the margin and relative global sea-level change are recorded within the crust underlying the south-west Indian Ocean. Although these events have been well modelled, fundamental questions remain regarding the nature and tectonic structure of the crust. Today, the Natal Valley region represents a frontier for geophysical exploration. Early attempts at imaging the crust beneath the seafloor within the south-west Indian Ocean made use of now primitive seismic reflection data acquisition and processing techniques available to them at the time (1960’s - 1970’s). Considering the advancements made in marine seismic reflection imaging, these vintage datasets lacked the horizontal and vertical resolution necessary to most accurately account for and describe features of the upper crust underlying the northern Natal Valley. This study is based on the acquisition, processing and preliminary interpretation of a newly acquired, regional seismic reflection profile, Profile Mz5-007, acquired across the northernmost region of the Natal Valley during the PAMELA-Moz5 cruise in 2016. The methods of marine seismic reflection data acquisition, processing and interpretation are described. The seismic reflection data presented in this dissertation provides a regional-scaled appraisal of the upper crust underlying the northern Natal Valley for the first time. The imagery allows a comprehensive description of crustal structures and features from the very northern Natal Valley, close to the Mozambique coastline, southwards into the southern Natal Valley offshore of Durban. The findings presented here support the notion that the crust underlying the northern Natal Valley experienced roughly N-S orientated trans-tensional stresses in relation to the breakup of West Gondwana. At least two major phases of volcanism are imaged within the seismic stratigraphy. The lower-most event underlies the Limpopo Fan in the northernmost regions of the Natal Valley at a depth of 2 seconds TWT and is interpreted as a seismic expression of the upper surface of the Lower – Middle Jurassic Karoo LIP. The progressive disappearance of this horizon towards the south coincides with the emergence of a second, overlying, as yet unreported volcanic horizon, which extends southwards throughout the Natal Valley. On the basis of its regional distribution, spatial relationship with the underlying event boundary and its deformation history, this volcanic horizon is interpreted to represent a series of basaltic lava outpourings during the Lower Cretaceous, initiated in response to trans-tensional crustal deformation associated with the breakup of West Gondwana. In addition to these two major phases of flood basalt outpouring, a number of localized volcanic flows are imaged throughout the stratigraphy, most notably over the Central Terrace. In addition, at least four major unconformities are identified, all of which are well developed within the Limpopo Fan. One of these is interpreted to represent the well-developed Mid-Cretaceous hiatus in sedimentation, providing a relative seismo-stratigraphic constraint to overlying and underlying seismic units. A review of the structural elements of the crust reveals how the northern Natal Valley is partitioned into two sub-basins separated by a prominent basement high, the Central Terrace, imaged across the central portions of Profile Mz5-007. To the north of the Central Terrace, structural deformation appears largely extensional, characterized by a large (~37 km wide) asymmetrical depression directly to the north of the Central Terrace and only minor structural faulting. To the south of the Central Terrace, trans-tensional stresses associated with withdrawal of the Falkland Malvinas Plateau have deformed the upper crust into a series of apparently southwards tilted crustal blocks, producing a series of deep (3.5 s TWT) half graben-like structures, within which syn-rift fill has an apparent dip towards the south. There is evidence to suggest ongoing reactivation of these fault structures. This zone of deformation is shown to bear resemblances to the faulting mapped onshore of the Kwa-Zulu Natal coastline, providing reason to consider the two regions as a continuous zone of deformation associated with the withdrawal of the Falkland-Malvinas Plateau during the breakup of West Gondwana. Furthermore, a number of post-sedimentary intrusive features are imaged, the largest of which is the Naude Ridge; a large pinnacle-like feature which has penetrated the upper crust towards the southern limit of the profile. This feature corresponds to an abrupt change in seafloor depth and upper crustal structure, suggesting that this feature may mark the transition between subsided continental crust interpreted to underlie the northern Natal Valley to the north and oceanic crust known to underlie the southern Natal Valley to the south.
- Full Text:
- Date Issued: 2018
- Authors: Moorcroft, David
- Date: 2018
- Subjects: Seismology , Seismology -- Kwa Zulu Natal -- Research Coasts -- Kwa Zulu Natal
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/22387 , vital:29965
- Description: The Natal Valley is a ~1000 km long, elongated depression in the seafloor, located within the south-west Indian Ocean, between the coastline of south-east Africa and the offshore aseismic Mozambique Ridge. Knowledge of its present-day crustal structure is important to reconstruct the Gondwana supercontinent break-up history and the concurrent opening of the Indian Ocean, which started during the Jurassic, some ~180 – 150 million years ago. Major geological events relating to this supercontinent break-up including continental rifting, magmatism, the emplacement of extensive oceanic flood basalt as submarine plateaus, vertical processes associated with tectonic uplift, flexural subsidence of the margin and relative global sea-level change are recorded within the crust underlying the south-west Indian Ocean. Although these events have been well modelled, fundamental questions remain regarding the nature and tectonic structure of the crust. Today, the Natal Valley region represents a frontier for geophysical exploration. Early attempts at imaging the crust beneath the seafloor within the south-west Indian Ocean made use of now primitive seismic reflection data acquisition and processing techniques available to them at the time (1960’s - 1970’s). Considering the advancements made in marine seismic reflection imaging, these vintage datasets lacked the horizontal and vertical resolution necessary to most accurately account for and describe features of the upper crust underlying the northern Natal Valley. This study is based on the acquisition, processing and preliminary interpretation of a newly acquired, regional seismic reflection profile, Profile Mz5-007, acquired across the northernmost region of the Natal Valley during the PAMELA-Moz5 cruise in 2016. The methods of marine seismic reflection data acquisition, processing and interpretation are described. The seismic reflection data presented in this dissertation provides a regional-scaled appraisal of the upper crust underlying the northern Natal Valley for the first time. The imagery allows a comprehensive description of crustal structures and features from the very northern Natal Valley, close to the Mozambique coastline, southwards into the southern Natal Valley offshore of Durban. The findings presented here support the notion that the crust underlying the northern Natal Valley experienced roughly N-S orientated trans-tensional stresses in relation to the breakup of West Gondwana. At least two major phases of volcanism are imaged within the seismic stratigraphy. The lower-most event underlies the Limpopo Fan in the northernmost regions of the Natal Valley at a depth of 2 seconds TWT and is interpreted as a seismic expression of the upper surface of the Lower – Middle Jurassic Karoo LIP. The progressive disappearance of this horizon towards the south coincides with the emergence of a second, overlying, as yet unreported volcanic horizon, which extends southwards throughout the Natal Valley. On the basis of its regional distribution, spatial relationship with the underlying event boundary and its deformation history, this volcanic horizon is interpreted to represent a series of basaltic lava outpourings during the Lower Cretaceous, initiated in response to trans-tensional crustal deformation associated with the breakup of West Gondwana. In addition to these two major phases of flood basalt outpouring, a number of localized volcanic flows are imaged throughout the stratigraphy, most notably over the Central Terrace. In addition, at least four major unconformities are identified, all of which are well developed within the Limpopo Fan. One of these is interpreted to represent the well-developed Mid-Cretaceous hiatus in sedimentation, providing a relative seismo-stratigraphic constraint to overlying and underlying seismic units. A review of the structural elements of the crust reveals how the northern Natal Valley is partitioned into two sub-basins separated by a prominent basement high, the Central Terrace, imaged across the central portions of Profile Mz5-007. To the north of the Central Terrace, structural deformation appears largely extensional, characterized by a large (~37 km wide) asymmetrical depression directly to the north of the Central Terrace and only minor structural faulting. To the south of the Central Terrace, trans-tensional stresses associated with withdrawal of the Falkland Malvinas Plateau have deformed the upper crust into a series of apparently southwards tilted crustal blocks, producing a series of deep (3.5 s TWT) half graben-like structures, within which syn-rift fill has an apparent dip towards the south. There is evidence to suggest ongoing reactivation of these fault structures. This zone of deformation is shown to bear resemblances to the faulting mapped onshore of the Kwa-Zulu Natal coastline, providing reason to consider the two regions as a continuous zone of deformation associated with the withdrawal of the Falkland-Malvinas Plateau during the breakup of West Gondwana. Furthermore, a number of post-sedimentary intrusive features are imaged, the largest of which is the Naude Ridge; a large pinnacle-like feature which has penetrated the upper crust towards the southern limit of the profile. This feature corresponds to an abrupt change in seafloor depth and upper crustal structure, suggesting that this feature may mark the transition between subsided continental crust interpreted to underlie the northern Natal Valley to the north and oceanic crust known to underlie the southern Natal Valley to the south.
- Full Text:
- Date Issued: 2018
A service delivery framework to unlock the revenue potential of the SME segments of commercercial banks in South Africa
- Authors: Mahlati, Mphenduli Mncedi
- Date: 2018
- Subjects: Small business -- Finance , Financial services industry -- Information technology Banks and banking Technological innovations
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/31633 , vital:31639
- Description: Small and Medium sized Enterprises (SMEs) are a vital driver to the world economy. They provide more than 60% of overall employment globally and approximately 80% of jobs in developed economies. This segment however remains underserved by banks who have struggled to serve SMEs effectively. Nevertheless banks are still perfectly placed to capture the needs of SME customers and to provide them with greater value adding services that address their needs. However, this must be done in a cost-effective manner to ensure long-term portfolio and banking profitability. SME Banking faces several challenges centred on the high cost to serve and profitability. For the banking sector to overcome these challenges and still meet increasing and changing customer needs, significant investment in digital technology is required. The literature reviewed identified that in order to unlock the revenue potential embedded within the SME segment; banks need ground-breaking solutions to solve their revenue and profitability conundrum. This study mentions that such solutions will need to be focused around placing banks as market enablers, by way of providing SMEs with a growth platform and not just financial transaction services. The study also identified a hybrid service delivery model and a digital ecosystem approach to SME banking as being pivotal to unlocking the revenue potential embedded within the segment. Through a digital ecosystem approach, banks can leverage their intra and inter banking network to assist SMEs to grow their businesses. In the process, this will serve as a way of increasing penetration into this underserved segment. In addition, such an approach to banking necessitates an acceptance of how interconnected business relationships have the capacity to enable business growth and subsequently to address SME banking risk. To also consider that banks in South Africa continue to view SMEs as being too risky and costly to serve. This study attempts to address this perceived riskiness by presenting a service delivery framework, which consists of key factors that would influence the revenue potential of the SME segments of Commercial Banks in South Africa. The empirical part of the research evaluated banking official’s awareness and understanding of key concepts that is likely to influence their views with regards to the revenue potential of the SME market.
- Full Text:
- Date Issued: 2018
- Authors: Mahlati, Mphenduli Mncedi
- Date: 2018
- Subjects: Small business -- Finance , Financial services industry -- Information technology Banks and banking Technological innovations
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/31633 , vital:31639
- Description: Small and Medium sized Enterprises (SMEs) are a vital driver to the world economy. They provide more than 60% of overall employment globally and approximately 80% of jobs in developed economies. This segment however remains underserved by banks who have struggled to serve SMEs effectively. Nevertheless banks are still perfectly placed to capture the needs of SME customers and to provide them with greater value adding services that address their needs. However, this must be done in a cost-effective manner to ensure long-term portfolio and banking profitability. SME Banking faces several challenges centred on the high cost to serve and profitability. For the banking sector to overcome these challenges and still meet increasing and changing customer needs, significant investment in digital technology is required. The literature reviewed identified that in order to unlock the revenue potential embedded within the SME segment; banks need ground-breaking solutions to solve their revenue and profitability conundrum. This study mentions that such solutions will need to be focused around placing banks as market enablers, by way of providing SMEs with a growth platform and not just financial transaction services. The study also identified a hybrid service delivery model and a digital ecosystem approach to SME banking as being pivotal to unlocking the revenue potential embedded within the segment. Through a digital ecosystem approach, banks can leverage their intra and inter banking network to assist SMEs to grow their businesses. In the process, this will serve as a way of increasing penetration into this underserved segment. In addition, such an approach to banking necessitates an acceptance of how interconnected business relationships have the capacity to enable business growth and subsequently to address SME banking risk. To also consider that banks in South Africa continue to view SMEs as being too risky and costly to serve. This study attempts to address this perceived riskiness by presenting a service delivery framework, which consists of key factors that would influence the revenue potential of the SME segments of Commercial Banks in South Africa. The empirical part of the research evaluated banking official’s awareness and understanding of key concepts that is likely to influence their views with regards to the revenue potential of the SME market.
- Full Text:
- Date Issued: 2018
A social media model for public participation in a South African municipality
- Authors: Fashoro, Ifeoluwapo
- Date: 2018
- Subjects: Information technology -- Social aspects -- South Africa , Social media -- South Africa Political participation -- Technological innovations -- South Africa Municipal government -- South Africa -- Citizen participation
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/29851 , vital:30786
- Description: Social media have become the preferred method of communication for individuals, organisations and even governments. These technologies have become ingrained in our everyday lives and have changed the way we communicate, collaborate are informed of recent happenings around the world. Social media websites are reported to be the most popular around the world. In the government sphere, social media is purported as a technology that will revolutionise citizen participation, service delivery and government-citizen interactions. Accordingly, governments around the world are steadily implementing social media in a bid to meet citizens’ demand for immediate and constant access to information, as well as increased opportunities to participate in government. Public participation has become an important focus area for government which could be used to effectively engage citizens and foster citizen trust. The United Nation’s E-government survey reports the presence of 125 countries on social media platforms. Despite the increased use of social media by governments, consensus among researchers is that governments need guidance on how to use social media effectively to achieve the potential benefits proposed by these technologies. Many social media adoptions by governments have been deemed as experimental; no formal action plan was designed, and many government employees are expected to learn social media use on-the-job. The aim of this research was to investigate and propose a social media model for public participation to leverage the opportunities provided by social media and present an effective and structured approach towards public participation. The research was designed as a mixed methods research using a case study based in the Eastern Cape Province of South Africa. The research involved a survey of citizens in the selected municipality based on the Uses and Gratifications Theory, interviews with employees responsible for social media in said municipality and a contents analysis of the existing social media pages of the municipality. The model was developed from the findings of the survey, interviews and existing literature. The implementation of the model was done in the Nelson Mandela Bay Municipality. The municipality appointed a social media champion responsible for obtaining support from top management and politicians within the municipality. Additional staff were added to the social media team and formal social media training was provided to the team. An official social media strategy was drafted and at the time of writing, needed to be approved by top management. The proposed model was operationalised within the Nelson Mandela Bay Municipality. This research makes several contributions to the E-government and social media fields in South Africa. The major contribution is the provision of guidance for South African municipalities to implement and use social media in an effective manner to achieve public participation. The research provided a phased approach to social media implementation that eliminates ad hoc experimentation and ensures the municipality’s social media activities are effective. The development of the model was based on the characteristics of the municipality and its citizens derived from the interviews and survey carried out. There are five phases in the model; Initialisation, Setup, Organisation, Institutionalisation and Maintenance. The model can be thought of as a guideline, and as such municipalities should adapt the implementation of the model to fit their organisational characteristics. The social media model will assist municipalities to determine the resources, tools and tactics to enable them to implement social media effectively, which will result in an improved engagement and participation process with citizens, and thereby foster trust.
- Full Text:
- Date Issued: 2018
- Authors: Fashoro, Ifeoluwapo
- Date: 2018
- Subjects: Information technology -- Social aspects -- South Africa , Social media -- South Africa Political participation -- Technological innovations -- South Africa Municipal government -- South Africa -- Citizen participation
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/29851 , vital:30786
- Description: Social media have become the preferred method of communication for individuals, organisations and even governments. These technologies have become ingrained in our everyday lives and have changed the way we communicate, collaborate are informed of recent happenings around the world. Social media websites are reported to be the most popular around the world. In the government sphere, social media is purported as a technology that will revolutionise citizen participation, service delivery and government-citizen interactions. Accordingly, governments around the world are steadily implementing social media in a bid to meet citizens’ demand for immediate and constant access to information, as well as increased opportunities to participate in government. Public participation has become an important focus area for government which could be used to effectively engage citizens and foster citizen trust. The United Nation’s E-government survey reports the presence of 125 countries on social media platforms. Despite the increased use of social media by governments, consensus among researchers is that governments need guidance on how to use social media effectively to achieve the potential benefits proposed by these technologies. Many social media adoptions by governments have been deemed as experimental; no formal action plan was designed, and many government employees are expected to learn social media use on-the-job. The aim of this research was to investigate and propose a social media model for public participation to leverage the opportunities provided by social media and present an effective and structured approach towards public participation. The research was designed as a mixed methods research using a case study based in the Eastern Cape Province of South Africa. The research involved a survey of citizens in the selected municipality based on the Uses and Gratifications Theory, interviews with employees responsible for social media in said municipality and a contents analysis of the existing social media pages of the municipality. The model was developed from the findings of the survey, interviews and existing literature. The implementation of the model was done in the Nelson Mandela Bay Municipality. The municipality appointed a social media champion responsible for obtaining support from top management and politicians within the municipality. Additional staff were added to the social media team and formal social media training was provided to the team. An official social media strategy was drafted and at the time of writing, needed to be approved by top management. The proposed model was operationalised within the Nelson Mandela Bay Municipality. This research makes several contributions to the E-government and social media fields in South Africa. The major contribution is the provision of guidance for South African municipalities to implement and use social media in an effective manner to achieve public participation. The research provided a phased approach to social media implementation that eliminates ad hoc experimentation and ensures the municipality’s social media activities are effective. The development of the model was based on the characteristics of the municipality and its citizens derived from the interviews and survey carried out. There are five phases in the model; Initialisation, Setup, Organisation, Institutionalisation and Maintenance. The model can be thought of as a guideline, and as such municipalities should adapt the implementation of the model to fit their organisational characteristics. The social media model will assist municipalities to determine the resources, tools and tactics to enable them to implement social media effectively, which will result in an improved engagement and participation process with citizens, and thereby foster trust.
- Full Text:
- Date Issued: 2018
A social realist study of employability development in engineering education
- Authors: Nudelman, Gabrielle Reeve
- Date: 2018
- Subjects: Critical realism , Electrical engineering -- Study and teaching (Higher) -- South Africa -- Cape Town , Employability , Career education -- South Africa -- Cape Town , School-to-work transition -- South Africa -- Cape Town
- Language: English
- Type: thesis , text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62884 , vital:28307
- Description: This qualitative case study of a course pairing offered to final-year electrical engineering students at the University of Cape Town in 2015 was undertaken in order to better understand the ways in which participation in undergraduate courses can prepare engineering students for the workplace. The course pairing consisted of New Venture Planning and Professional Communication Studies. While the former aimed to expose students to the knowledge relating to starting a new business, the latter focused on teaching students how to create written and oral texts to support such an endeavour. Using Roy Bhaskar’s critical realism as a theoretical underlabourer, the study develops understandings regarding the generative mechanisms at work during the two courses. In support of this, the study posits an understanding of employability that moves beyond the acquisition of discrete workplace skills. Rather, employability is conceptualised as discursive transformation, with students being deemed “work-ready” when they develop discursive identities as engineers. Data generation took place by means of focus group and individual interviews, ethnographic observation and documentary research. Margaret Archer’s social realist tools – in particular, analytical dualism and the morphogenetic framework were used to trace the students’ transformations over the course pairing. It was argued that those students who developed discursive identities of engineers were those who, in Archer’s terms, emerged as social actors at the end of the course pairing. Two characteristics of the courses were found to enable this transformation: those parts that promoted deepened understanding of what the role of “engineer” entailed and the parts that provided spaces for students to develop their own personal identities. The findings of the study indicated that discursive identities as engineers were more likely to be developed through the group work and spaces for reflection engendered by the courses than as a result of the formal curriculum. The implications of the research are that, while a focus on employability in engineering education is valid and productive, this needs to be supported by opportunities for authentic learning experiences which afford students the opportunity to engage in learning that promotes real-life application of knowledge. , Thesis (PhD)--Rhodes University, Faculty of Education, Education, 2018
- Full Text:
- Date Issued: 2018
- Authors: Nudelman, Gabrielle Reeve
- Date: 2018
- Subjects: Critical realism , Electrical engineering -- Study and teaching (Higher) -- South Africa -- Cape Town , Employability , Career education -- South Africa -- Cape Town , School-to-work transition -- South Africa -- Cape Town
- Language: English
- Type: thesis , text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62884 , vital:28307
- Description: This qualitative case study of a course pairing offered to final-year electrical engineering students at the University of Cape Town in 2015 was undertaken in order to better understand the ways in which participation in undergraduate courses can prepare engineering students for the workplace. The course pairing consisted of New Venture Planning and Professional Communication Studies. While the former aimed to expose students to the knowledge relating to starting a new business, the latter focused on teaching students how to create written and oral texts to support such an endeavour. Using Roy Bhaskar’s critical realism as a theoretical underlabourer, the study develops understandings regarding the generative mechanisms at work during the two courses. In support of this, the study posits an understanding of employability that moves beyond the acquisition of discrete workplace skills. Rather, employability is conceptualised as discursive transformation, with students being deemed “work-ready” when they develop discursive identities as engineers. Data generation took place by means of focus group and individual interviews, ethnographic observation and documentary research. Margaret Archer’s social realist tools – in particular, analytical dualism and the morphogenetic framework were used to trace the students’ transformations over the course pairing. It was argued that those students who developed discursive identities of engineers were those who, in Archer’s terms, emerged as social actors at the end of the course pairing. Two characteristics of the courses were found to enable this transformation: those parts that promoted deepened understanding of what the role of “engineer” entailed and the parts that provided spaces for students to develop their own personal identities. The findings of the study indicated that discursive identities as engineers were more likely to be developed through the group work and spaces for reflection engendered by the courses than as a result of the formal curriculum. The implications of the research are that, while a focus on employability in engineering education is valid and productive, this needs to be supported by opportunities for authentic learning experiences which afford students the opportunity to engage in learning that promotes real-life application of knowledge. , Thesis (PhD)--Rhodes University, Faculty of Education, Education, 2018
- Full Text:
- Date Issued: 2018
A sociological investigation of popular music consumption among Nigerian youths living at Summerstrand and Humewood
- Uwuoruya, Osabuohien Clifford
- Authors: Uwuoruya, Osabuohien Clifford
- Date: 2018
- Subjects: Popular culture -- South Africa -- Port Elizabeth , Music and youth -- Africa Africa -- In popular culture Music and globalization -- Africa Socialism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/36738 , vital:34049
- Description: The focus of this research study is on investigating how certain Nigerian youths expression of their agency at consuming popular music as a cultural product could be constrained by certain identified institutions and their gender in Nigeria. Using General Systems Theory (GST) as a theoretical framework, the country is presented as a social system with identified institutions which function within it that guides and constrains the agency of the individuals who live in Nigeria. A review of academic narratives relevant to the research is presented in this dissertation to provide a context for the study. A critical realist epistemology is adopted for this exploratory study, within the qualitative research tradition. A sample of twenty Nigerian youths living at Summerstrand and Humewood, is selected by the researcher using purposive sampling, and semi-structured interviews are conducted with these participants to gather their opinions and experiences regarding the research study. The narratives are analysed using thematic analysis, and the researcher presents an interpretation of these narratives under various topics in the dissertation. The findings from this study shows how some of these Nigerian youths believe their expression of agency at consuming popular music in Nigeria, to be constrained by certain institutions, and their gender in the country which they are part of, although this constraint could sometimes prove to be positive for some individuals. The recommendations from this research study are relevant to improving youth agency at consuming popular music in Nigeria, and advancing sociological inquiry into popular music and youth agency within an African context.
- Full Text:
- Date Issued: 2018
- Authors: Uwuoruya, Osabuohien Clifford
- Date: 2018
- Subjects: Popular culture -- South Africa -- Port Elizabeth , Music and youth -- Africa Africa -- In popular culture Music and globalization -- Africa Socialism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/36738 , vital:34049
- Description: The focus of this research study is on investigating how certain Nigerian youths expression of their agency at consuming popular music as a cultural product could be constrained by certain identified institutions and their gender in Nigeria. Using General Systems Theory (GST) as a theoretical framework, the country is presented as a social system with identified institutions which function within it that guides and constrains the agency of the individuals who live in Nigeria. A review of academic narratives relevant to the research is presented in this dissertation to provide a context for the study. A critical realist epistemology is adopted for this exploratory study, within the qualitative research tradition. A sample of twenty Nigerian youths living at Summerstrand and Humewood, is selected by the researcher using purposive sampling, and semi-structured interviews are conducted with these participants to gather their opinions and experiences regarding the research study. The narratives are analysed using thematic analysis, and the researcher presents an interpretation of these narratives under various topics in the dissertation. The findings from this study shows how some of these Nigerian youths believe their expression of agency at consuming popular music in Nigeria, to be constrained by certain institutions, and their gender in the country which they are part of, although this constraint could sometimes prove to be positive for some individuals. The recommendations from this research study are relevant to improving youth agency at consuming popular music in Nigeria, and advancing sociological inquiry into popular music and youth agency within an African context.
- Full Text:
- Date Issued: 2018
A sociological investigation of the challenges facing married students : case study of the University of Fort Hare, Alice Campus
- Authors: Qwabi, Thabisile Daphney
- Date: 2018
- Subjects: Married students Academic achievement Married students -- Case studies
- Language: English
- Type: Thesis , Masters , Sociology
- Identifier: http://hdl.handle.net/10353/10262 , vital:35386
- Description: The aim of this study was to explain and understand problems facing married students at the University of Fort Hare, Alice Campus. The study population was drawn from the University of Fort Hare, Alice campus. The study used simple random sampling and purposive sampling to draw a representative sample of 50 married students (21 males and 29females) from the population of this study. This study used a mixed research approach. Questionnaires were distributed, for quantitative purposes, and interviews were conducted, for qualitative purposes, among the chosen representative sample. Data that was collected with questionnaires was analysed using Statistical Package for Social Sciences (SPSS) and qualitative data was analysed using thematic analyses and was used to substantiate quantitative findings. The findings in this study expanded on how factors such as, lack of time to study, the impact of multiple roles on the well-being of married students, pressure from having multiple roles and lack of support from family contributed to the poor academic performance of married students. This study revealed high levels of stress and poor academic performance as a result of having multiple roles among married students at the University of Fort Hare, Alice campus.
- Full Text:
- Date Issued: 2018
- Authors: Qwabi, Thabisile Daphney
- Date: 2018
- Subjects: Married students Academic achievement Married students -- Case studies
- Language: English
- Type: Thesis , Masters , Sociology
- Identifier: http://hdl.handle.net/10353/10262 , vital:35386
- Description: The aim of this study was to explain and understand problems facing married students at the University of Fort Hare, Alice Campus. The study population was drawn from the University of Fort Hare, Alice campus. The study used simple random sampling and purposive sampling to draw a representative sample of 50 married students (21 males and 29females) from the population of this study. This study used a mixed research approach. Questionnaires were distributed, for quantitative purposes, and interviews were conducted, for qualitative purposes, among the chosen representative sample. Data that was collected with questionnaires was analysed using Statistical Package for Social Sciences (SPSS) and qualitative data was analysed using thematic analyses and was used to substantiate quantitative findings. The findings in this study expanded on how factors such as, lack of time to study, the impact of multiple roles on the well-being of married students, pressure from having multiple roles and lack of support from family contributed to the poor academic performance of married students. This study revealed high levels of stress and poor academic performance as a result of having multiple roles among married students at the University of Fort Hare, Alice campus.
- Full Text:
- Date Issued: 2018
A sociological investigation of the community perception of females involved in criminal activities in Rosedale, Uitenhage
- Authors: Swartbooi, Eden Rivonia
- Date: 2018
- Subjects: Female offenders -- South Africa -- Nelson Mandela Bay Municipality -- Public opinion , Women and the criminal justice system Deviant behavior Crime -- South Africa -- Port Elizabeth -- Public opinion
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/35807 , vital:33849
- Description: The purpose of this dissertation is to gather the community perception of females involved in criminal activities at Rosedale in Uitenhage. The main theory used in this study was the Poverty theory. The study was conducted by using the qualitative research design. Interviews were semi structured and conducted using an interview schedule.20 participants both male and female (youth and adults) were interviewed in Rosedale. The thematic data analysis method was used. The findings of this study revealed that the main reasons for female involvement in criminal activities in Rosedale is due to: drug and alcohol abuse there are too many people selling drugs in Rosedale which makes it easily accessible for the youth to purchase and practise use daily. There are too many shebeens and taverns in Rosedale and they allow under aged children to purchase and consume alcohol this causes negative toxic behaviour. Unemployment there are not enough employment opportunities available for the youth in Rosedale. Poverty, some families don’t have the basic needs to survive daily therefore they choose to turn to crime to support themselves and their families. Insufficient recreational activities, the youth do not have anything to do, there is a lack of recreational activities in the community therefore the youth turns to crime. The main challenges facing the youth in Rosedale is that there are a lot of drop outs or they choose not to attend school, unemployment was mentioned again, gangsterism, there are a lot of house breakings and robberies taking place to purchase drugs. All participants are against females being involved in criminal activities in Rosedale they do not agree with it and think that its’ unethical for a female to participate in criminal activities because females are the care givers, nurtures and providers of their families and the society. More police visibility, the death penalty and employment opportunities were highlighted as the main solutions.
- Full Text:
- Date Issued: 2018
- Authors: Swartbooi, Eden Rivonia
- Date: 2018
- Subjects: Female offenders -- South Africa -- Nelson Mandela Bay Municipality -- Public opinion , Women and the criminal justice system Deviant behavior Crime -- South Africa -- Port Elizabeth -- Public opinion
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/35807 , vital:33849
- Description: The purpose of this dissertation is to gather the community perception of females involved in criminal activities at Rosedale in Uitenhage. The main theory used in this study was the Poverty theory. The study was conducted by using the qualitative research design. Interviews were semi structured and conducted using an interview schedule.20 participants both male and female (youth and adults) were interviewed in Rosedale. The thematic data analysis method was used. The findings of this study revealed that the main reasons for female involvement in criminal activities in Rosedale is due to: drug and alcohol abuse there are too many people selling drugs in Rosedale which makes it easily accessible for the youth to purchase and practise use daily. There are too many shebeens and taverns in Rosedale and they allow under aged children to purchase and consume alcohol this causes negative toxic behaviour. Unemployment there are not enough employment opportunities available for the youth in Rosedale. Poverty, some families don’t have the basic needs to survive daily therefore they choose to turn to crime to support themselves and their families. Insufficient recreational activities, the youth do not have anything to do, there is a lack of recreational activities in the community therefore the youth turns to crime. The main challenges facing the youth in Rosedale is that there are a lot of drop outs or they choose not to attend school, unemployment was mentioned again, gangsterism, there are a lot of house breakings and robberies taking place to purchase drugs. All participants are against females being involved in criminal activities in Rosedale they do not agree with it and think that its’ unethical for a female to participate in criminal activities because females are the care givers, nurtures and providers of their families and the society. More police visibility, the death penalty and employment opportunities were highlighted as the main solutions.
- Full Text:
- Date Issued: 2018
A sociological investigation of the youth perceptions on HIV and aids in central, Port Elizabeth
- Authors: Sandi, Fundiswa
- Date: 2018
- Subjects: HIV infections -- Research -- South Africa -- Port Elizabeth , HIV infections -- Social aspects -- South Africa -- Port Elizabeth Sexual health -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/34821 , vital:33456
- Description: the study which was conducted in Central, Port Elizabeth, mainly focusing on the youth perceptions towards HIV and AIDS. This chapter also gives an overall of the study, the literature review which is used on the study and the theory of Social Action which is used as a theoretical framework for this study. The chapter also includes the objectives and aims of the study, so as the research question which guided throughout the research and be able to reach the goal of this study. This chapter has also mentioned what has led to this particular topic and the fact that HIV and AIDS is a problem among the youth of South Africa so as Africa as a continent which needs to be controlled. Geographic maps of the Eastern Cape, Port Elizabeth and Central which the youth situated in are included in this chapter. The ethical consideration which also guided this study as to how to deal with human beings, which is important is also mentioned.
- Full Text:
- Date Issued: 2018
- Authors: Sandi, Fundiswa
- Date: 2018
- Subjects: HIV infections -- Research -- South Africa -- Port Elizabeth , HIV infections -- Social aspects -- South Africa -- Port Elizabeth Sexual health -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/34821 , vital:33456
- Description: the study which was conducted in Central, Port Elizabeth, mainly focusing on the youth perceptions towards HIV and AIDS. This chapter also gives an overall of the study, the literature review which is used on the study and the theory of Social Action which is used as a theoretical framework for this study. The chapter also includes the objectives and aims of the study, so as the research question which guided throughout the research and be able to reach the goal of this study. This chapter has also mentioned what has led to this particular topic and the fact that HIV and AIDS is a problem among the youth of South Africa so as Africa as a continent which needs to be controlled. Geographic maps of the Eastern Cape, Port Elizabeth and Central which the youth situated in are included in this chapter. The ethical consideration which also guided this study as to how to deal with human beings, which is important is also mentioned.
- Full Text:
- Date Issued: 2018
A sociological investigation on the perceptions of the educational aspect of male initiation among amaXhosa in KwaZakhele Township, Port Elizabeth
- Authors: Jayiya, Ludwe
- Date: 2018
- Subjects: Xhosa (African people) -- Rites and ceremonies , Initiation rites -- South Africa -- Port Elizabeth Culture -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/30594 , vital:30973
- Description: People in different walks of life have previously and even currently trying hard to contribute in improving the situation regarding the longstanding tradition of male initiation. The expectation of the society, is that these young men should show that they have gone through the process of growth and they should reflect the education they received from the initiation school. The research objectives include, the investigation of the perceptions of people about male initiation in KwaZakhele, to contribute within the Sociology of Education particularly within the context of Xhosa culture in KwaZakhele and to come up with the recommendations with the view of addressing some of the problems pertaining to male initiation within the context of Xhosa culture in KwaZakhele. This study has followed the qualitative approach which included among others individual interviews using an interview schedule containing the research questions. To supplement the interviews, texts, books and other relevant material were used.
- Full Text:
- Date Issued: 2018
- Authors: Jayiya, Ludwe
- Date: 2018
- Subjects: Xhosa (African people) -- Rites and ceremonies , Initiation rites -- South Africa -- Port Elizabeth Culture -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/30594 , vital:30973
- Description: People in different walks of life have previously and even currently trying hard to contribute in improving the situation regarding the longstanding tradition of male initiation. The expectation of the society, is that these young men should show that they have gone through the process of growth and they should reflect the education they received from the initiation school. The research objectives include, the investigation of the perceptions of people about male initiation in KwaZakhele, to contribute within the Sociology of Education particularly within the context of Xhosa culture in KwaZakhele and to come up with the recommendations with the view of addressing some of the problems pertaining to male initiation within the context of Xhosa culture in KwaZakhele. This study has followed the qualitative approach which included among others individual interviews using an interview schedule containing the research questions. To supplement the interviews, texts, books and other relevant material were used.
- Full Text:
- Date Issued: 2018
A spatio-temporal, landscape perspective on acacia dealbata invasions and broader land-use and cover changes in the Northern Eastern Cape, South Africa
- Authors: Gouws, Aidan John
- Date: 2018
- Subjects: Acacia -- South Africa -- Eastern Cape , Biological invasions -- South Africa -- Eastern Cape , Plant invasions -- South Africa -- Eastern Cape , Acacia -- Biological control -- South Africa -- Eastern Cape , Eastern Cape (South Africa) -- Rural conditions
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62373 , vital:28161
- Description: Biological invasions are a wicked, social-ecological problem, interacting with numerous components within and across a range of spatio-temporal scales, with the potential to disturb broader socio-economic and ecological systems. Acacia dealbata is an invasive shrub in South Africa, widely naturalised across the grassland biome. Although the deployment of a biocontrol agent on A. dealbata is apparently justified considering its highly invasive and ecologically destructive nature, it should proceed with caution due to the integration of the species into the livelihoods of rural communities. This study sought to understand the nature and extent of the A. dealbata invasion in the northern Eastern Cape. Research was conducted in nine villages in rural Matatiele, Mount Fletcher and Maclear, selected for the pervasiveness of A. dealbata around these villages. A time-series of aerial photographs were systematically classified according to designated A. dealbata and land-use/land cover (LULC) categories in ArcGIS to track changes in the extent and rate of spread of A. dealbata, while standard vegetation surveying techniques were used to determine the current abundance and productivity of A. dealbata in selected areas. A high degree of spatial variability characterised the extent, density and biomass of A. dealbata, as well as the annual rate of spread and biomass production. The growth, productivity and spread of A. dealbata were significantly positive, and relatively few biophysical conditions correlated with the invasion. This was indicative of the broad range of invaded and potentially invasible habitats, suggesting that the extent and abundance of A. dealbata will likely continue to increase, barring deliberate intervention. Broader changes in LULC were also apparent, multidirectional and spatio- temporally variable. Despite a net increase in A. dealbata, the invasion was found to be highly dynamic, with various LULC transitioning to A. dealbata, but in turn A. dealbata transitioning to other LULC. Indeed, biological invasions are dynamic, context-specific phenomena, shaped by the heterogeneity of landscapes. Management interventions to limit or control A. dealbata should therefore consider the spatio-temporal dynamics of invaded landscapes, as well as the local-scale abundance, productivity and biophysical conditions of the area, while taking into consideration the livelihood requirements of the local communities.
- Full Text:
- Date Issued: 2018
- Authors: Gouws, Aidan John
- Date: 2018
- Subjects: Acacia -- South Africa -- Eastern Cape , Biological invasions -- South Africa -- Eastern Cape , Plant invasions -- South Africa -- Eastern Cape , Acacia -- Biological control -- South Africa -- Eastern Cape , Eastern Cape (South Africa) -- Rural conditions
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62373 , vital:28161
- Description: Biological invasions are a wicked, social-ecological problem, interacting with numerous components within and across a range of spatio-temporal scales, with the potential to disturb broader socio-economic and ecological systems. Acacia dealbata is an invasive shrub in South Africa, widely naturalised across the grassland biome. Although the deployment of a biocontrol agent on A. dealbata is apparently justified considering its highly invasive and ecologically destructive nature, it should proceed with caution due to the integration of the species into the livelihoods of rural communities. This study sought to understand the nature and extent of the A. dealbata invasion in the northern Eastern Cape. Research was conducted in nine villages in rural Matatiele, Mount Fletcher and Maclear, selected for the pervasiveness of A. dealbata around these villages. A time-series of aerial photographs were systematically classified according to designated A. dealbata and land-use/land cover (LULC) categories in ArcGIS to track changes in the extent and rate of spread of A. dealbata, while standard vegetation surveying techniques were used to determine the current abundance and productivity of A. dealbata in selected areas. A high degree of spatial variability characterised the extent, density and biomass of A. dealbata, as well as the annual rate of spread and biomass production. The growth, productivity and spread of A. dealbata were significantly positive, and relatively few biophysical conditions correlated with the invasion. This was indicative of the broad range of invaded and potentially invasible habitats, suggesting that the extent and abundance of A. dealbata will likely continue to increase, barring deliberate intervention. Broader changes in LULC were also apparent, multidirectional and spatio- temporally variable. Despite a net increase in A. dealbata, the invasion was found to be highly dynamic, with various LULC transitioning to A. dealbata, but in turn A. dealbata transitioning to other LULC. Indeed, biological invasions are dynamic, context-specific phenomena, shaped by the heterogeneity of landscapes. Management interventions to limit or control A. dealbata should therefore consider the spatio-temporal dynamics of invaded landscapes, as well as the local-scale abundance, productivity and biophysical conditions of the area, while taking into consideration the livelihood requirements of the local communities.
- Full Text:
- Date Issued: 2018
A strategy to enhance the role of the church as a social service delivery agent in fighting poverty in contemporary South Africa
- Lujabe, Busisiwe Tando Tabiso
- Authors: Lujabe, Busisiwe Tando Tabiso
- Date: 2018
- Subjects: Community-based social services Community development
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/17876 , vital:28477
- Description: The possible role and involvement of the Church in social development has reemerged as an important focus of contemporary academic and religious development discourse in South Africa. There are strong voices arguing for churches and other Faith-Based Organisations to be regarded as strategic in contributing to addressing the challenge of poverty as agents of social development. Yet, as church congregations multiply throughout South Africa, they appear to be less responsive to the challenge of poverty facing South African communities, contrary to the rich history of churches in the past. The need for churches to be involved in sustainable community-driven development initiatives to fight poverty in their local communities cannot be denied nor be met with just rhetoric and scholarly dissertations by theologians and academics. The vicious cycle of poverty in our communities must be eradicated as it represents a social injustice in terms of South Africa‘s Constitution and speaks to deep structural inequalities inherent in our society. Whilst researchers have made several proposals for churches to move from social welfare and relief, there appears to be little research with a clear practical strategy which congregations can implement to enhance their social service delivery role from social relief to sustainable community development. This has left a considerable gap which the current research sought to address. This study thus responds to the call by previous research for churches to implement strategies other than mere relief. Hence, this study contributes to the religious development discourse in South Africa, by developing a strategy to enhance Church-based social service delivery initiatives from social relief efforts which are not sustainable, to community development efforts which are sustainable and which will be consistent with the current social development policy context and contextually relevant to the socio-economic challenges of poverty and its consequences in South Africa. The study was conducted in two phases. During phase one, the main purpose was to gain a deeper understanding of the historical and current involvement of the Church in providing social services which address poverty in communities, to enhance understanding of the factors which influence the provision of social services by churches, as well as to understand participants views of how church-based social service delivery can be improved in order to fight poverty. For phase two, the goal was to develop a strategy to enhance church-based social service delivery from being social relief to being community development oriented. The following objectives guided the research process: To review selected and applicable literature to gain a deeper understanding of the historical and current involvement of the Church in the delivery of social services in order to fight poverty; To explore and describe the perceptions of church leaders and congregation members of the historical and current involvement of the Church in the delivery of social services in order to fight poverty; To explore and describe the factors which influence Church-based social service delivery in fighting poverty; To explore the views of church leaders and congregation members on how church-based social service delivery can be improved in their churches to inform the development of a strategy to enhance church-based social service delivery in fighting poverty. This study employed a qualitative research approach grounded in the interpretivist social science paradigm. The qualitative research approach necessitated an exploratory, descriptive and contextual method of inquiry. A descriptive case study method was also used, with the Methodist Church of Southern Africa selected as the main case of focus. The target population in this research comprised of Christian churches with a historical involvement in social service delivery in pre-apartheid South Africa. Purposeful sampling of 5 churches was undertaken, namely; Roman Catholic Church (RCC), Anglican Church (AC), Dutch Reformed Church (DRC), KwaSizabantu Mission (KSB) and Methodist Church of Southern Africa (MCSA). Data collection was conducted in two phases. Phase one comprised a literature review; Phase two comprised gathering empirical evidence by conducting face to face semi-structured interviews with clergy and from conducting one focus group interview with congregants. The information obtained from participants was transcribed, coded and analysed using content analysis and by a computer-assisted qualitative data analysis software (CAQDAS), namely ATLAS.ti. Findings revealed a marked difference between the historical and current churchbased social service delivery suggestive of decline, accompanied by the lack of empowerment opportunities for current church leaders and congregation members in community development facilitation. Further evidence suggest the lack of cooperation between church leaders and congregation members; as well as the lack of sustainability of interventions owing to an absence of resources and the lack of capacity to create sustainable economic opportunities. Findings also revealed that church congregations are rich with people with various assets - skills, strengths, capabilities, passions, gifts, talents in various fields, which they can share with one another as congregations and communities. The discussion of findings reflected that historically, Church-based social service provision involved holistic intervention mechanisms, empowerment, collaborations and sustainability of interventions suggestive of second generation strategies of community development, while currently, Church-based social service provision involves mostly social relief and social welfare efforts suggestive of first generation strategies. The findings suggest a holistic strategy for ―reawakening the co-operativeness‖ of congregations to facilitate sustainable Church-based social service delivery towards fighting poverty in local communities. The strategy which was then developed and described with its sub-strategies, namely: Establishment of collaborative relationships Creation of empowerment opportunities Facilitation of holistic interventions The goal of the strategy is to guide church leaders and congregation members in facilitating sustainable Church-based social service programmes to fight poverty.
- Full Text:
- Date Issued: 2018
- Authors: Lujabe, Busisiwe Tando Tabiso
- Date: 2018
- Subjects: Community-based social services Community development
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/17876 , vital:28477
- Description: The possible role and involvement of the Church in social development has reemerged as an important focus of contemporary academic and religious development discourse in South Africa. There are strong voices arguing for churches and other Faith-Based Organisations to be regarded as strategic in contributing to addressing the challenge of poverty as agents of social development. Yet, as church congregations multiply throughout South Africa, they appear to be less responsive to the challenge of poverty facing South African communities, contrary to the rich history of churches in the past. The need for churches to be involved in sustainable community-driven development initiatives to fight poverty in their local communities cannot be denied nor be met with just rhetoric and scholarly dissertations by theologians and academics. The vicious cycle of poverty in our communities must be eradicated as it represents a social injustice in terms of South Africa‘s Constitution and speaks to deep structural inequalities inherent in our society. Whilst researchers have made several proposals for churches to move from social welfare and relief, there appears to be little research with a clear practical strategy which congregations can implement to enhance their social service delivery role from social relief to sustainable community development. This has left a considerable gap which the current research sought to address. This study thus responds to the call by previous research for churches to implement strategies other than mere relief. Hence, this study contributes to the religious development discourse in South Africa, by developing a strategy to enhance Church-based social service delivery initiatives from social relief efforts which are not sustainable, to community development efforts which are sustainable and which will be consistent with the current social development policy context and contextually relevant to the socio-economic challenges of poverty and its consequences in South Africa. The study was conducted in two phases. During phase one, the main purpose was to gain a deeper understanding of the historical and current involvement of the Church in providing social services which address poverty in communities, to enhance understanding of the factors which influence the provision of social services by churches, as well as to understand participants views of how church-based social service delivery can be improved in order to fight poverty. For phase two, the goal was to develop a strategy to enhance church-based social service delivery from being social relief to being community development oriented. The following objectives guided the research process: To review selected and applicable literature to gain a deeper understanding of the historical and current involvement of the Church in the delivery of social services in order to fight poverty; To explore and describe the perceptions of church leaders and congregation members of the historical and current involvement of the Church in the delivery of social services in order to fight poverty; To explore and describe the factors which influence Church-based social service delivery in fighting poverty; To explore the views of church leaders and congregation members on how church-based social service delivery can be improved in their churches to inform the development of a strategy to enhance church-based social service delivery in fighting poverty. This study employed a qualitative research approach grounded in the interpretivist social science paradigm. The qualitative research approach necessitated an exploratory, descriptive and contextual method of inquiry. A descriptive case study method was also used, with the Methodist Church of Southern Africa selected as the main case of focus. The target population in this research comprised of Christian churches with a historical involvement in social service delivery in pre-apartheid South Africa. Purposeful sampling of 5 churches was undertaken, namely; Roman Catholic Church (RCC), Anglican Church (AC), Dutch Reformed Church (DRC), KwaSizabantu Mission (KSB) and Methodist Church of Southern Africa (MCSA). Data collection was conducted in two phases. Phase one comprised a literature review; Phase two comprised gathering empirical evidence by conducting face to face semi-structured interviews with clergy and from conducting one focus group interview with congregants. The information obtained from participants was transcribed, coded and analysed using content analysis and by a computer-assisted qualitative data analysis software (CAQDAS), namely ATLAS.ti. Findings revealed a marked difference between the historical and current churchbased social service delivery suggestive of decline, accompanied by the lack of empowerment opportunities for current church leaders and congregation members in community development facilitation. Further evidence suggest the lack of cooperation between church leaders and congregation members; as well as the lack of sustainability of interventions owing to an absence of resources and the lack of capacity to create sustainable economic opportunities. Findings also revealed that church congregations are rich with people with various assets - skills, strengths, capabilities, passions, gifts, talents in various fields, which they can share with one another as congregations and communities. The discussion of findings reflected that historically, Church-based social service provision involved holistic intervention mechanisms, empowerment, collaborations and sustainability of interventions suggestive of second generation strategies of community development, while currently, Church-based social service provision involves mostly social relief and social welfare efforts suggestive of first generation strategies. The findings suggest a holistic strategy for ―reawakening the co-operativeness‖ of congregations to facilitate sustainable Church-based social service delivery towards fighting poverty in local communities. The strategy which was then developed and described with its sub-strategies, namely: Establishment of collaborative relationships Creation of empowerment opportunities Facilitation of holistic interventions The goal of the strategy is to guide church leaders and congregation members in facilitating sustainable Church-based social service programmes to fight poverty.
- Full Text:
- Date Issued: 2018
A survey of organizational culture and organizational performance in a manufacturing company
- Authors: Dom, Veliswa Virginia
- Date: 2018
- Subjects: Corporate culture -- South Africa -- Eastern Cape , Organizational behavior -- South Africa -- Eastern Cape , Factories -- South Africa -- Eastern Cape , Analysis of variance , Shift systems -- South Africa -- Eastern Cape , Employees -- Rating of -- South Africa -- Eastern Cape , Competing Values Framework (CVF)
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/61861 , vital:28069
- Description: The purpose of this research was to explore the relationship between organizational culture and organizational performance in a manufacturing company. This company supplies metal products to the motor vehicle manufacturing industry, where the quality and quantity of parts produced is of paramount importance, since the buyers of these products are quality conscious. The organization has three production shifts that rotate each week. Anecdotal observations are that irrespective of the time that a shift operates over the course of the month, the different shifts tend to perform at different levels in terms of quality and quantity of output. This study therefore sought to investigate if these differences between shifts are statistically significant, and if so, whether these shifts also have differences in organizational culture. Components of organizational culture include values, norms, beliefs, attitudes, principles and expectations that give the organization a unique personality and differentiate it from other organizations. While the literature indicates that qualitative or quantitative approaches can be used in organizational culture research, this research adopted the quantitative approach, making use of the Competing Values Framework (CVF). The CVF is a four-category organizational culture typology established by Cameron and Quinn (2006). The framework is based on two dimensions: stability or flexibility of the organization, and external or internal focus. In this research, the CVF was used as a measurement tool to evaluate organizational culture. In order to determine differences in organizational culture between shifts, a survey was undertaken (N=138) which measured employee perceptions pertaining to the existing organizational culture of each of the three production shifts at the company. Secondly, differences in performance between the shifts were examined by using the performance data for a three-month period for each shift in terms of quantity and quality. This data was obtained from the management of the production process at the company. Statistical analysis was done using ANOVA to analyse the differences between the shifts. The findings indicated that the dominant existing organizational culture at the company under investigation is a clan culture. Furthermore, there is a statistically significant difference between the cultures of all the three shifts at the manufacturing company. The results also indicated that there is a statistically significant difference in the quantity and quality of production between the three shifts. In conclusion, the research indicated there are differences in culture and in performance, but given the nature of the data, it was not possible to statistically analyse the relationship between shift culture and performance. However, it is conceivable that cultural differences between shifts may be contributing to performance differences. With regards to further research, it is recommended that this research be extended to other branches of the manufacturing company in other regions, in order to determine whether there are any significant differences in culture and performance between these branches and their shifts. Research could also be extended to other South African organizations to create a sufficiently large sample of shift and/or business units, so as to be able to do statistical analysis of the relationship between culture and performance.
- Full Text:
- Date Issued: 2018
- Authors: Dom, Veliswa Virginia
- Date: 2018
- Subjects: Corporate culture -- South Africa -- Eastern Cape , Organizational behavior -- South Africa -- Eastern Cape , Factories -- South Africa -- Eastern Cape , Analysis of variance , Shift systems -- South Africa -- Eastern Cape , Employees -- Rating of -- South Africa -- Eastern Cape , Competing Values Framework (CVF)
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/61861 , vital:28069
- Description: The purpose of this research was to explore the relationship between organizational culture and organizational performance in a manufacturing company. This company supplies metal products to the motor vehicle manufacturing industry, where the quality and quantity of parts produced is of paramount importance, since the buyers of these products are quality conscious. The organization has three production shifts that rotate each week. Anecdotal observations are that irrespective of the time that a shift operates over the course of the month, the different shifts tend to perform at different levels in terms of quality and quantity of output. This study therefore sought to investigate if these differences between shifts are statistically significant, and if so, whether these shifts also have differences in organizational culture. Components of organizational culture include values, norms, beliefs, attitudes, principles and expectations that give the organization a unique personality and differentiate it from other organizations. While the literature indicates that qualitative or quantitative approaches can be used in organizational culture research, this research adopted the quantitative approach, making use of the Competing Values Framework (CVF). The CVF is a four-category organizational culture typology established by Cameron and Quinn (2006). The framework is based on two dimensions: stability or flexibility of the organization, and external or internal focus. In this research, the CVF was used as a measurement tool to evaluate organizational culture. In order to determine differences in organizational culture between shifts, a survey was undertaken (N=138) which measured employee perceptions pertaining to the existing organizational culture of each of the three production shifts at the company. Secondly, differences in performance between the shifts were examined by using the performance data for a three-month period for each shift in terms of quantity and quality. This data was obtained from the management of the production process at the company. Statistical analysis was done using ANOVA to analyse the differences between the shifts. The findings indicated that the dominant existing organizational culture at the company under investigation is a clan culture. Furthermore, there is a statistically significant difference between the cultures of all the three shifts at the manufacturing company. The results also indicated that there is a statistically significant difference in the quantity and quality of production between the three shifts. In conclusion, the research indicated there are differences in culture and in performance, but given the nature of the data, it was not possible to statistically analyse the relationship between shift culture and performance. However, it is conceivable that cultural differences between shifts may be contributing to performance differences. With regards to further research, it is recommended that this research be extended to other branches of the manufacturing company in other regions, in order to determine whether there are any significant differences in culture and performance between these branches and their shifts. Research could also be extended to other South African organizations to create a sufficiently large sample of shift and/or business units, so as to be able to do statistical analysis of the relationship between culture and performance.
- Full Text:
- Date Issued: 2018
A systematic review of intervention effectiveness for problem anger in an adult outpatient population
- Authors: von Ruben, Adriana
- Date: 2018
- Subjects: Anger , Anger -- Treatment , Rational emotive behavior therapy , Personality assessment , Social psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/36059 , vital:33886
- Description: Increasing levels of anger are becoming one of the major social problems of modern society, yet anger is one of the least understood emotions. Given the long-term consequences and the seriousness of the negative outcomes associated with anger, there is a pressing need for effective anger management interventions targeted at different populations experiencing various types of problem anger.The purpose of this dissertation was to conduct a systematic review of current qualitative and quantitative research regarding the status of anger reducing interventions within outpatient populations. The aim was to explore the efficacy of various psychological approaches utilised to reduce problem anger. Eligibility criteria included studies with samples that had problem anger defined psychometrically. The search of available literature revealed 16 relevant reports containing 15 studies. All located studies utilised intervention modalities derived from cognitive and behavioural approaches. Results indicated large to moderate improvements in problem anger for the participants receiving the treatment. Cognitive and behavioural anger interventions were found to produce reductions in trait anger, general anger, the negative expression and suppression of anger, anger related physiological arousal, and increased the positive, controlled anger experience. More large-scale studies are needed implementing other psychological approaches to test their effectiveness in reducing maladaptive anger. The dearth of anger research conducted within outpatient populations is discussed in the context of the emerged themes.
- Full Text:
- Date Issued: 2018
- Authors: von Ruben, Adriana
- Date: 2018
- Subjects: Anger , Anger -- Treatment , Rational emotive behavior therapy , Personality assessment , Social psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/36059 , vital:33886
- Description: Increasing levels of anger are becoming one of the major social problems of modern society, yet anger is one of the least understood emotions. Given the long-term consequences and the seriousness of the negative outcomes associated with anger, there is a pressing need for effective anger management interventions targeted at different populations experiencing various types of problem anger.The purpose of this dissertation was to conduct a systematic review of current qualitative and quantitative research regarding the status of anger reducing interventions within outpatient populations. The aim was to explore the efficacy of various psychological approaches utilised to reduce problem anger. Eligibility criteria included studies with samples that had problem anger defined psychometrically. The search of available literature revealed 16 relevant reports containing 15 studies. All located studies utilised intervention modalities derived from cognitive and behavioural approaches. Results indicated large to moderate improvements in problem anger for the participants receiving the treatment. Cognitive and behavioural anger interventions were found to produce reductions in trait anger, general anger, the negative expression and suppression of anger, anger related physiological arousal, and increased the positive, controlled anger experience. More large-scale studies are needed implementing other psychological approaches to test their effectiveness in reducing maladaptive anger. The dearth of anger research conducted within outpatient populations is discussed in the context of the emerged themes.
- Full Text:
- Date Issued: 2018
A thematic analysis of the challenges experienced by those living with tuberculosis
- Authors: Walaza, Robert Letsholo
- Date: 2018
- Subjects: Tuberculosis Patients South Africa , Tuberculosis Social aspects , South Africa Social conditions , Poor Health and hygiene South Africa , Poor Medical care South Africa , Social medicine South Africa
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/61850 , vital:28068
- Description: Friedrich Engels (1820-1895) in his study, The condition of the working class in England, argued that the cause of illness and death amongst the working class was due to their living conditions such as poor housing, over-crowding, poor sanitation, food shortage, low paying jobs and a lack of material resources. The objective of the study was to understand the experiences of six South African individuals who have shared their experiences and challenges of living with TB on the TB&ME blog, and to show how TB is linked to the living conditions of these individuals. The study found that the challenges experienced by TB patient bloggers are of a social nature and confirms Engel’s study findings on the conditions of the working class in England. For example, a disease such as TB has a direct association with the living conditions of people, especially the poor. Thus, socio economic status of TB patient bloggers plays a role in the escalation of their ill health. Further, the study found that gender is central in understanding non-compliance to treatment. This is significant as it highlights the need to not only focus on issues of socioeconomics, but gender issues in fighting TB. Despite the negative consequences associated with living with TB, the bloggers have noted that the support from loved ones and other stakeholders in the fight against TB alleviates the challenges inherent in living with TB.
- Full Text:
- Date Issued: 2018
- Authors: Walaza, Robert Letsholo
- Date: 2018
- Subjects: Tuberculosis Patients South Africa , Tuberculosis Social aspects , South Africa Social conditions , Poor Health and hygiene South Africa , Poor Medical care South Africa , Social medicine South Africa
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/61850 , vital:28068
- Description: Friedrich Engels (1820-1895) in his study, The condition of the working class in England, argued that the cause of illness and death amongst the working class was due to their living conditions such as poor housing, over-crowding, poor sanitation, food shortage, low paying jobs and a lack of material resources. The objective of the study was to understand the experiences of six South African individuals who have shared their experiences and challenges of living with TB on the TB&ME blog, and to show how TB is linked to the living conditions of these individuals. The study found that the challenges experienced by TB patient bloggers are of a social nature and confirms Engel’s study findings on the conditions of the working class in England. For example, a disease such as TB has a direct association with the living conditions of people, especially the poor. Thus, socio economic status of TB patient bloggers plays a role in the escalation of their ill health. Further, the study found that gender is central in understanding non-compliance to treatment. This is significant as it highlights the need to not only focus on issues of socioeconomics, but gender issues in fighting TB. Despite the negative consequences associated with living with TB, the bloggers have noted that the support from loved ones and other stakeholders in the fight against TB alleviates the challenges inherent in living with TB.
- Full Text:
- Date Issued: 2018
A theoretical study on primary health care services within a South African context
- Mkalipi, Thembinkosi Delport
- Authors: Mkalipi, Thembinkosi Delport
- Date: 2018
- Subjects: Primary health care -- South Africa , Health facilities -- South Africa Clinics -- South Africa
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/32193 , vital:31979
- Description: Primary health care (PHC) is a system introduced to bring health services closer to communities. It was introduced with its challenges such as the management and treatment of various illnesses including HIV, TB and STI’s which have affected certain communities. The non-communicable diseases which require the attention of PHC institutions still face numerous challenges including the referral system and clinics with limited medicine. The study revealed that there are limited measures in place to deal with communities in rural areas who require medical assistance from government. Further challenges identified from the study included human resource management, supply chain management, finance and other administrative support systems. The inadequate funding of the Department of Health appears to be directly related to adequate service delivery problems. The study adopted a qualitative research methodology which incorporated an extensive desktop analysis and literature review approach. No human participants were involved. Health legislation is an important enabler and a necessary component of health policy. Research has shown that since 1995 when the first edition of the review appeared, South Africa has been engaged in a constant process of public health law reform and despite significant gains, some legislative processes have stalled. Examples include the certificate of need provided for in the National Health Act, the introduction of compulsory continuing professional development for pharmacists, the recognition of specialist nurses as prescribers, and the introduction of international benchmarking for medicinal processes. The process of introducing NHI remains contested with the legislative component, still under developed. Although NHI will in due course be a game changer and there has been some strengthening of the health service in the NHI pilot district to date, in general, implementation has been slower than anticipated in the NHI green paper released in August 2011. The NHI white paper indicated that public health care spending was likely to increase substantially over the next 15years from 4% to 6% of the GDP. Several mechanisms for raising revenue have been proposed, including some combination of an increase of VAT or payroll tax, or an increase of personal income tax. NHI also has the potential to improve efficiencies in the overall health system through improved pooling, strategic purchasing, medicine price reduction through central procurement, redistribution, improved quality in the public sector and providing greater access to general practitioners. Development of, and amendment to the relevant health technology assessment policy and legislative frameworks are needed in order to inform appropriate universal health coverage and to align with the 2015 NHI white paper Addressing social determinants is the cornerstone of the National Department of Health’s primary health care system. A engineering strategy, and an approach that is embedded in the country’s national development plan is needed. However the translation of this policy commitment to programmatic action at different levels in the health system and in partnership with other sectors remains elusive Evidence indicate that South African patients face challenges in accessing heath care particularly those from rural areas. The main challenge is the lack of a coordinated strategy to ensure continuous access to treatment, cure and support for chronic conditions. This study has shown that the private for profit hospital sector is well resourced and caters to a population that is wealthier, urban and more likely to be formerly employed. The public hospital sector catering to the majority of South Africans, faces lower human resourcing ratios, financial constraints and ageing infrastructure. The ideal clinic realisation and maintenance programme was assigned in response to the current deficiencies in the quality of primary health care services and to lay a strong foundation for the implementation of national health insurance. There is an urgent need to develop cohesive, sustainable systems to support evidence based decisions on appropriate regime choices, while minimizing risks associated with medication. This study has shown the importance of a robust national PV system in order to reduce the significant burden of drug induced diseases, to inform treatment policies with real world evidence, to improve outcomes of common diseases, such as HIV, TB, hypertension, and diabetes through optimal therapeutic management, and to ensure the safety of large scale therapeutic interventions such as vaccines, especially when newly introduced. Results from the study suggest that there is a failure by policy-makers to adequately address the challenges faced by PHC institutions. There also appears to be a backlog in terms of the promulgation of enabling legislation to address certain of the challenges. The Department of Health has a number of draft policies which are negatively affecting the level of service delivery. The study revealed that the challenges include, inter alia, inadequate budgeting, staff shortages, aging infrastructure, the non-availability of certain medicines in hospitals, a poor referral system with limited measures in place to address HIV, TB and STI’s as well as non-communicable treatments.
- Full Text:
- Date Issued: 2018
- Authors: Mkalipi, Thembinkosi Delport
- Date: 2018
- Subjects: Primary health care -- South Africa , Health facilities -- South Africa Clinics -- South Africa
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/32193 , vital:31979
- Description: Primary health care (PHC) is a system introduced to bring health services closer to communities. It was introduced with its challenges such as the management and treatment of various illnesses including HIV, TB and STI’s which have affected certain communities. The non-communicable diseases which require the attention of PHC institutions still face numerous challenges including the referral system and clinics with limited medicine. The study revealed that there are limited measures in place to deal with communities in rural areas who require medical assistance from government. Further challenges identified from the study included human resource management, supply chain management, finance and other administrative support systems. The inadequate funding of the Department of Health appears to be directly related to adequate service delivery problems. The study adopted a qualitative research methodology which incorporated an extensive desktop analysis and literature review approach. No human participants were involved. Health legislation is an important enabler and a necessary component of health policy. Research has shown that since 1995 when the first edition of the review appeared, South Africa has been engaged in a constant process of public health law reform and despite significant gains, some legislative processes have stalled. Examples include the certificate of need provided for in the National Health Act, the introduction of compulsory continuing professional development for pharmacists, the recognition of specialist nurses as prescribers, and the introduction of international benchmarking for medicinal processes. The process of introducing NHI remains contested with the legislative component, still under developed. Although NHI will in due course be a game changer and there has been some strengthening of the health service in the NHI pilot district to date, in general, implementation has been slower than anticipated in the NHI green paper released in August 2011. The NHI white paper indicated that public health care spending was likely to increase substantially over the next 15years from 4% to 6% of the GDP. Several mechanisms for raising revenue have been proposed, including some combination of an increase of VAT or payroll tax, or an increase of personal income tax. NHI also has the potential to improve efficiencies in the overall health system through improved pooling, strategic purchasing, medicine price reduction through central procurement, redistribution, improved quality in the public sector and providing greater access to general practitioners. Development of, and amendment to the relevant health technology assessment policy and legislative frameworks are needed in order to inform appropriate universal health coverage and to align with the 2015 NHI white paper Addressing social determinants is the cornerstone of the National Department of Health’s primary health care system. A engineering strategy, and an approach that is embedded in the country’s national development plan is needed. However the translation of this policy commitment to programmatic action at different levels in the health system and in partnership with other sectors remains elusive Evidence indicate that South African patients face challenges in accessing heath care particularly those from rural areas. The main challenge is the lack of a coordinated strategy to ensure continuous access to treatment, cure and support for chronic conditions. This study has shown that the private for profit hospital sector is well resourced and caters to a population that is wealthier, urban and more likely to be formerly employed. The public hospital sector catering to the majority of South Africans, faces lower human resourcing ratios, financial constraints and ageing infrastructure. The ideal clinic realisation and maintenance programme was assigned in response to the current deficiencies in the quality of primary health care services and to lay a strong foundation for the implementation of national health insurance. There is an urgent need to develop cohesive, sustainable systems to support evidence based decisions on appropriate regime choices, while minimizing risks associated with medication. This study has shown the importance of a robust national PV system in order to reduce the significant burden of drug induced diseases, to inform treatment policies with real world evidence, to improve outcomes of common diseases, such as HIV, TB, hypertension, and diabetes through optimal therapeutic management, and to ensure the safety of large scale therapeutic interventions such as vaccines, especially when newly introduced. Results from the study suggest that there is a failure by policy-makers to adequately address the challenges faced by PHC institutions. There also appears to be a backlog in terms of the promulgation of enabling legislation to address certain of the challenges. The Department of Health has a number of draft policies which are negatively affecting the level of service delivery. The study revealed that the challenges include, inter alia, inadequate budgeting, staff shortages, aging infrastructure, the non-availability of certain medicines in hospitals, a poor referral system with limited measures in place to address HIV, TB and STI’s as well as non-communicable treatments.
- Full Text:
- Date Issued: 2018
A trend analysis of perinatal mortalities in Barberton Hospital between 2002 and 2016
- Modupe, Oluwarotimi Folorunsho
- Authors: Modupe, Oluwarotimi Folorunsho
- Date: 2018
- Subjects: Newborn infants -- Mortality Perinatology
- Language: English
- Type: Thesis , Masters , MPH
- Identifier: http://hdl.handle.net/10353/11254 , vital:37630
- Description: Background and aim: There is no doubt that the quantification of data on the new born is imperative towards the design of effective public health policy interventions. However, the trend in under-five mortality rates in Barberton Hospital is not recognised as no empirical investigation has been undertaken to ascertain its position in this regard. A trend analysis of infant and maternal deaths in will therefore shed light on possible factors influencing this trend. The specific objectives of this study were to examine the trend and causes of perinatal mortality in Barberton Hospital from 2002-2016. It was hypothesized that there would be a downward trend in the infant and maternal mortality rates in Barberton Hospital from 2002-2016, possibly as a result of improved medical care. Methods: This retrospective study was conducted in Barberton Hospital, located in the Umjindi sub-district in Mpumalanga Province. The data was drawn from the Perinatal Problem Identification Programme (PPIP) database. Pregnancy related deaths of women, and of children from birth to one year in Barberton Hospital from 1999-2014 were extracted. The population study consists of a record review of all infant and maternal deaths in Barberton Hospital from 2002-2016 and captured in the data on the PPIP. The University of Fort Hare ethical review committee approved the study protocol. In addition, permission to use the data was granted by the Mpumalanga Department of Health after applying for approval for use of the data for academic purposes. The data was then exported into an Excel format document and fed to Statistical Package for Social Sciences (SPSS) program to allow for a more detailed analysis. Results: Over the period under review (2002-2016), a total of 21151 babies were delivered, 20593 babies were alive at discharge, 221 babies died in the first 28 days of delivery, and 337 babies were stillbirths. 18577 were normal weight (≥2500gram), 1581 weighed 2000-2499 grams, 568 weighed 1500-1999grams, 286 weighed 1000-1499 and 139 weighed below 1000grams. All the women who gave birth over the period under review, 27.3percent tested positive to HIV, 40.3 percent tested negative. Of all women that tested positive, 80.2percent received any form of ART. For over half of women that received ART (n=2981), the type of ART they received is unknown. Most women whose baby died were young. One in five women did not have their age captured in the database indicating an important gap that need to be addressed in order to ensure integrity of the database. Of all the 558 perinatal mortality, 75.3 weighed below 2500 grams. Low birth weight is major risk factor for child mortality. Babies weighing less than 2,500 grams are 20 times more likely to die than heavier babies. For all the perinatal deaths, the majority of their mothers received antenatal care services. About 86.6percent were delivered at Barberton Hospital and only 1 child was delivered in transit to the hospital. Of all the 558 deaths, only 7.5 percent was multiple births. Of the 558 babies that died, only 39.6percent were born alive, 37.1percent was macerated stillbirths. The syphilis serology test indicated that most mothers tested negative. The HIV serology test indicated that 28percent of mothers tested positive. The hospital recorded a total of 337 stillbirths between 2002 and 2016. This accounts for 60.2percent of all perinatal mortality over the period. Of all stillbirths, 61.6percent was macerated stillbirths. Yearly analysis of stillbirth rate did not clearly indicate whether stillbirth rate is increasing or declining. Not less than 56 primary obstetric causes of perinatal deaths were identified in this study. Many perinatal deaths were unexplainable due to lack of post-mortem. Idiopathic preterm labour was the main primary obstetric cause of early (34.5percent) and late neonatal (38.9percent) deaths, and the next was labour related intrapartum asphyxia. Labour related intrapartum asphyxia also accounts for 6.8percent of all stillbirths. The main known primary obstetric cause of stillbirth in the Hospital was Proteinuric hypertension/hypertension disorders. Over 60percent of perinatal mortality in Barberton Hospital was due to associated maternal conditions. Only 10.9percent was due to fetal related conditions and 26.4percent was unexplained. Few deaths were due to health system failure and domestic violence. Spontaneous preterm labour (18.4percent), abnormal labour or uterine rupture (14.5percent), maternal hypertension (12.4percent), antepartum haemorrhage (10.2percent) were the main associated maternal conditions causes of perinatal mortality in Barberton Hospital. Similarly, Fetal abnormality and infections were the main associated fetal condition causes of perinatal mortality. Of all the babies that were alive at birth, 85.2percent died due to maternal related conditions. Most neonates died due to spontaneous preterm labour (43.5percent) and abnormal labour or uterine rupture (23.1percent). Maternal HIV, diabetics and syphilis only accounted for a few neonatal deaths. For stillbirth babies that were alive at admission, abnormal labour or uterine rupture (33.1percent) and antepartum haemorrhage (19.7percent) were the main causes of their death. Over 60percent of all of macerated deaths have unexplained causes. Maternal hypertension is the main known cause of macerated stillbirth. For stillbirths that were dead on admission, maternal hypertension (13.1percent), antepartum haemorrhage (26.2percent) and abnormal labour or uterine rupture were the main causes of deaths. The majority of perinatal deaths in the hospital were caused by intrauterine deaths (58.8percent). Extreme multi-organ immaturity (13.1percent), Hyaline membrane disease (7.2percent) and Hypoxic ischaemic encephalopathy (5.2percent) were among the main final causes of perinatal deaths. The main behavioural factor causing perinatal mortality in Mpumalanga province was non-use of antenatal care services. The majority of perinatal mortality (60.4percent) was due to health system related causes. Most perinatal deaths were due to poor management of cases and delayed referral. Conclusion: The findings indicate that while stillbirths have slightly declined, neonatal deaths have not declined over the period. Perinatal have slightly declined in the hospital. The findings of this study also indicate that the majority of perinatal deaths in the hospital were caused by idiopathic preterm labour, unexplained intrauterine deaths, hypertension, and intrapartum asphyxia. Patient and health system related factors contributed significantly to perinatal deaths in the hospital. There is a need for yearly analysis of PPIP data to track progress and identify area for continuous improvement in provision of quality obstetric services. A greater community awareness of risk factors for perinatal deaths and importance of early and regular take up antenatal care services is needed.
- Full Text:
- Date Issued: 2018
- Authors: Modupe, Oluwarotimi Folorunsho
- Date: 2018
- Subjects: Newborn infants -- Mortality Perinatology
- Language: English
- Type: Thesis , Masters , MPH
- Identifier: http://hdl.handle.net/10353/11254 , vital:37630
- Description: Background and aim: There is no doubt that the quantification of data on the new born is imperative towards the design of effective public health policy interventions. However, the trend in under-five mortality rates in Barberton Hospital is not recognised as no empirical investigation has been undertaken to ascertain its position in this regard. A trend analysis of infant and maternal deaths in will therefore shed light on possible factors influencing this trend. The specific objectives of this study were to examine the trend and causes of perinatal mortality in Barberton Hospital from 2002-2016. It was hypothesized that there would be a downward trend in the infant and maternal mortality rates in Barberton Hospital from 2002-2016, possibly as a result of improved medical care. Methods: This retrospective study was conducted in Barberton Hospital, located in the Umjindi sub-district in Mpumalanga Province. The data was drawn from the Perinatal Problem Identification Programme (PPIP) database. Pregnancy related deaths of women, and of children from birth to one year in Barberton Hospital from 1999-2014 were extracted. The population study consists of a record review of all infant and maternal deaths in Barberton Hospital from 2002-2016 and captured in the data on the PPIP. The University of Fort Hare ethical review committee approved the study protocol. In addition, permission to use the data was granted by the Mpumalanga Department of Health after applying for approval for use of the data for academic purposes. The data was then exported into an Excel format document and fed to Statistical Package for Social Sciences (SPSS) program to allow for a more detailed analysis. Results: Over the period under review (2002-2016), a total of 21151 babies were delivered, 20593 babies were alive at discharge, 221 babies died in the first 28 days of delivery, and 337 babies were stillbirths. 18577 were normal weight (≥2500gram), 1581 weighed 2000-2499 grams, 568 weighed 1500-1999grams, 286 weighed 1000-1499 and 139 weighed below 1000grams. All the women who gave birth over the period under review, 27.3percent tested positive to HIV, 40.3 percent tested negative. Of all women that tested positive, 80.2percent received any form of ART. For over half of women that received ART (n=2981), the type of ART they received is unknown. Most women whose baby died were young. One in five women did not have their age captured in the database indicating an important gap that need to be addressed in order to ensure integrity of the database. Of all the 558 perinatal mortality, 75.3 weighed below 2500 grams. Low birth weight is major risk factor for child mortality. Babies weighing less than 2,500 grams are 20 times more likely to die than heavier babies. For all the perinatal deaths, the majority of their mothers received antenatal care services. About 86.6percent were delivered at Barberton Hospital and only 1 child was delivered in transit to the hospital. Of all the 558 deaths, only 7.5 percent was multiple births. Of the 558 babies that died, only 39.6percent were born alive, 37.1percent was macerated stillbirths. The syphilis serology test indicated that most mothers tested negative. The HIV serology test indicated that 28percent of mothers tested positive. The hospital recorded a total of 337 stillbirths between 2002 and 2016. This accounts for 60.2percent of all perinatal mortality over the period. Of all stillbirths, 61.6percent was macerated stillbirths. Yearly analysis of stillbirth rate did not clearly indicate whether stillbirth rate is increasing or declining. Not less than 56 primary obstetric causes of perinatal deaths were identified in this study. Many perinatal deaths were unexplainable due to lack of post-mortem. Idiopathic preterm labour was the main primary obstetric cause of early (34.5percent) and late neonatal (38.9percent) deaths, and the next was labour related intrapartum asphyxia. Labour related intrapartum asphyxia also accounts for 6.8percent of all stillbirths. The main known primary obstetric cause of stillbirth in the Hospital was Proteinuric hypertension/hypertension disorders. Over 60percent of perinatal mortality in Barberton Hospital was due to associated maternal conditions. Only 10.9percent was due to fetal related conditions and 26.4percent was unexplained. Few deaths were due to health system failure and domestic violence. Spontaneous preterm labour (18.4percent), abnormal labour or uterine rupture (14.5percent), maternal hypertension (12.4percent), antepartum haemorrhage (10.2percent) were the main associated maternal conditions causes of perinatal mortality in Barberton Hospital. Similarly, Fetal abnormality and infections were the main associated fetal condition causes of perinatal mortality. Of all the babies that were alive at birth, 85.2percent died due to maternal related conditions. Most neonates died due to spontaneous preterm labour (43.5percent) and abnormal labour or uterine rupture (23.1percent). Maternal HIV, diabetics and syphilis only accounted for a few neonatal deaths. For stillbirth babies that were alive at admission, abnormal labour or uterine rupture (33.1percent) and antepartum haemorrhage (19.7percent) were the main causes of their death. Over 60percent of all of macerated deaths have unexplained causes. Maternal hypertension is the main known cause of macerated stillbirth. For stillbirths that were dead on admission, maternal hypertension (13.1percent), antepartum haemorrhage (26.2percent) and abnormal labour or uterine rupture were the main causes of deaths. The majority of perinatal deaths in the hospital were caused by intrauterine deaths (58.8percent). Extreme multi-organ immaturity (13.1percent), Hyaline membrane disease (7.2percent) and Hypoxic ischaemic encephalopathy (5.2percent) were among the main final causes of perinatal deaths. The main behavioural factor causing perinatal mortality in Mpumalanga province was non-use of antenatal care services. The majority of perinatal mortality (60.4percent) was due to health system related causes. Most perinatal deaths were due to poor management of cases and delayed referral. Conclusion: The findings indicate that while stillbirths have slightly declined, neonatal deaths have not declined over the period. Perinatal have slightly declined in the hospital. The findings of this study also indicate that the majority of perinatal deaths in the hospital were caused by idiopathic preterm labour, unexplained intrauterine deaths, hypertension, and intrapartum asphyxia. Patient and health system related factors contributed significantly to perinatal deaths in the hospital. There is a need for yearly analysis of PPIP data to track progress and identify area for continuous improvement in provision of quality obstetric services. A greater community awareness of risk factors for perinatal deaths and importance of early and regular take up antenatal care services is needed.
- Full Text:
- Date Issued: 2018
A trust based model for enhanced adoption of diabetes self-management mobile applications
- Authors: Mainoti, Ganizani Fidelis
- Date: 2018
- Subjects: Medical records -- Data processing Medical records -- Management Mobile communication systems
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/11041 , vital:37011
- Description: Information technology (IT) trust is an important concept as people today rely more on IT to perform their tasks than before. Extensive research in Information Systems (IS) has explored trust and how it affects clients’ selection of different IT artefacts. Literature found trust to be a key determinant of technology use and an accelerator of understanding user perceptions regarding technology. Users’ perception of a technology’s characteristics influences their initial decision to adopt it; they are less likely to try the technology once they perceive significant risk linked to the technology exploration. The study focused on trust in relation to adoption of mobile applications (apps) for self-management of diabetic treatment regimens. The aim was to identify factors that should be incorporated in these apps to positively influence user perception of trustworthiness for enhanced adoption. According to extant literature, there are a myriad of apps which are available and ready for use, but diabetic patients are not maximising these opportunities to actively participate in managing their conditions. This is in spite of the numerous benefits accruable from using these apps to aid treatment regimens away from clinical settings or with minimal involvement of health personnel. This work is a qualitative study that investigated the reasons behind the low levels of trust in mobile applications for self-management of diabetes. The research design involved a survey and the study employed interviews for primary data collection. Twenty participants were engaged in the intervention. Some of these respondents were diabetic patients on treatment and others were health staff specialising in diabetes treatment. The participants were asked to download and try, for one month or more, the Diabetes:M app from Google play store for android devices or from iTunes for IOS devices. Thereafter, interviews were held with the participants to investigate their perceptions of the diabetes management app. Based on the outcome of the investigation, the researcher put forward a model proposing the attributes of trustworthiness of diabetes self-management mobile apps for enhanced adoption. Research findings showed that the apps for diabetes self-management should be usable, possess sufficient functionalities, give accurate information for decision-making, be reliable, and secure in order to enhance the trust of diabetic patients.
- Full Text:
- Date Issued: 2018
- Authors: Mainoti, Ganizani Fidelis
- Date: 2018
- Subjects: Medical records -- Data processing Medical records -- Management Mobile communication systems
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/11041 , vital:37011
- Description: Information technology (IT) trust is an important concept as people today rely more on IT to perform their tasks than before. Extensive research in Information Systems (IS) has explored trust and how it affects clients’ selection of different IT artefacts. Literature found trust to be a key determinant of technology use and an accelerator of understanding user perceptions regarding technology. Users’ perception of a technology’s characteristics influences their initial decision to adopt it; they are less likely to try the technology once they perceive significant risk linked to the technology exploration. The study focused on trust in relation to adoption of mobile applications (apps) for self-management of diabetic treatment regimens. The aim was to identify factors that should be incorporated in these apps to positively influence user perception of trustworthiness for enhanced adoption. According to extant literature, there are a myriad of apps which are available and ready for use, but diabetic patients are not maximising these opportunities to actively participate in managing their conditions. This is in spite of the numerous benefits accruable from using these apps to aid treatment regimens away from clinical settings or with minimal involvement of health personnel. This work is a qualitative study that investigated the reasons behind the low levels of trust in mobile applications for self-management of diabetes. The research design involved a survey and the study employed interviews for primary data collection. Twenty participants were engaged in the intervention. Some of these respondents were diabetic patients on treatment and others were health staff specialising in diabetes treatment. The participants were asked to download and try, for one month or more, the Diabetes:M app from Google play store for android devices or from iTunes for IOS devices. Thereafter, interviews were held with the participants to investigate their perceptions of the diabetes management app. Based on the outcome of the investigation, the researcher put forward a model proposing the attributes of trustworthiness of diabetes self-management mobile apps for enhanced adoption. Research findings showed that the apps for diabetes self-management should be usable, possess sufficient functionalities, give accurate information for decision-making, be reliable, and secure in order to enhance the trust of diabetic patients.
- Full Text:
- Date Issued: 2018
Access to information on higher education as a barrier for rural learners of Tyolomnqa Village, Eastern Cape
- Authors: Ntwasa, Simbongile
- Date: 2018
- Subjects: Information resources--South Africa--Eastern Cape Information services--South Africa--Eastern Cape Digital divide--South Africa
- Language: English
- Type: Thesis , Masters , Rural Development
- Identifier: http://hdl.handle.net/10353/17149 , vital:40860
- Description: Worldwide, there is a large body of research that convincingly demonstrates the benefits of Higher Education (HE) in the socio-economic status of individuals who have gone through and qualified with certificates, diplomas and degrees. But access to HE does not just benefit individuals, it also has benefits for communities or broader society (access to HE may benefit individual scholars, but can also benefit economically the entire families and poverty stricken communities such as those from Tsholomnqa village where this study was conducted). However, in South Africa, there is limited research that focuses on the importance of and challenges of access to HE as confronted by rural scholars. This research presents findings from a mixed method based study which sought to probe key issues relating to access to HE and challenges facing rural scholars regarding access to information on HE. The study involved as many as 209 Grade 12 learners from two high schools in the rural area of Tsholomnqa village in the Eastern Cape Province, a province associated with high levels of poverty, inequalities and unemployment in South Africa. The findings reveal that rural scholars about to qualify for university access information on HE information primarily from the internet. However, it was found that issues such as not having data or smartphones to search the internet and lack of support from their parents and teachers including universities affected their self-efficacy and self-esteem. The implications of these findings suggest that HE institutions must target and strengthen outreach and visibility in rural schools.
- Full Text:
- Date Issued: 2018
- Authors: Ntwasa, Simbongile
- Date: 2018
- Subjects: Information resources--South Africa--Eastern Cape Information services--South Africa--Eastern Cape Digital divide--South Africa
- Language: English
- Type: Thesis , Masters , Rural Development
- Identifier: http://hdl.handle.net/10353/17149 , vital:40860
- Description: Worldwide, there is a large body of research that convincingly demonstrates the benefits of Higher Education (HE) in the socio-economic status of individuals who have gone through and qualified with certificates, diplomas and degrees. But access to HE does not just benefit individuals, it also has benefits for communities or broader society (access to HE may benefit individual scholars, but can also benefit economically the entire families and poverty stricken communities such as those from Tsholomnqa village where this study was conducted). However, in South Africa, there is limited research that focuses on the importance of and challenges of access to HE as confronted by rural scholars. This research presents findings from a mixed method based study which sought to probe key issues relating to access to HE and challenges facing rural scholars regarding access to information on HE. The study involved as many as 209 Grade 12 learners from two high schools in the rural area of Tsholomnqa village in the Eastern Cape Province, a province associated with high levels of poverty, inequalities and unemployment in South Africa. The findings reveal that rural scholars about to qualify for university access information on HE information primarily from the internet. However, it was found that issues such as not having data or smartphones to search the internet and lack of support from their parents and teachers including universities affected their self-efficacy and self-esteem. The implications of these findings suggest that HE institutions must target and strengthen outreach and visibility in rural schools.
- Full Text:
- Date Issued: 2018
Active learning strategies used by teachers during English reading comprehension lessons in six selected primary schools in Nigeria
- Adepoju, Adetokunboh Abayomi
- Authors: Adepoju, Adetokunboh Abayomi
- Date: 2018
- Subjects: Education, Primary -- Nigeria Learning strategies -- Nigeria
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/8485 , vital:32838
- Description: Reading is an integral part of education from which one gets access to information. Unfortunately, reading ability among primary school pupils, the foundation level of education, is at its lowest ebb. These pupils when they get to secondary schools eventually fail external examinations-a situation which according to National Examination Council, is caused by inappropriate teaching methods. Consequent upon this, this study assessed active learning strategies used by teacher during English reading comprehension lessons in six selected primary schools in Nigeria. The main research question was: How do teachers employ active learning strategies in teaching English reading comprehension? The study adopted qualitative approach and case study design. With the use of purposive sampling technique to select six head teachers, six primary VI teachers, two members of the School Basic Committee, the Director Local Government Education Authority and six focus groups. The study used interviews, documents and focus group interview as research instruments to collect data. Data were analysed based on interpretivism paradigm which interpreted participants’ views according to the word view of the participants. The study found out that teachers have good knowledge of active learning strategies and use them in teaching English reading comprehension lessons but are faced with some daunting challenges such as non-availability of instructional materials, lack of library, lack of qualified teachers and lack of time. The study concluded that students fail woefully in English reading comprehension because teachers do not use appropriate teaching techniques. The study recommend that teachers must use active learning strategies effectively and more often during English reading comprehension, more time should be allocated for English reading comprehension, effective use of instructional materials should be considered and the government should employ specialist teachers to teach English reading comprehension.
- Full Text:
- Date Issued: 2018
- Authors: Adepoju, Adetokunboh Abayomi
- Date: 2018
- Subjects: Education, Primary -- Nigeria Learning strategies -- Nigeria
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/8485 , vital:32838
- Description: Reading is an integral part of education from which one gets access to information. Unfortunately, reading ability among primary school pupils, the foundation level of education, is at its lowest ebb. These pupils when they get to secondary schools eventually fail external examinations-a situation which according to National Examination Council, is caused by inappropriate teaching methods. Consequent upon this, this study assessed active learning strategies used by teacher during English reading comprehension lessons in six selected primary schools in Nigeria. The main research question was: How do teachers employ active learning strategies in teaching English reading comprehension? The study adopted qualitative approach and case study design. With the use of purposive sampling technique to select six head teachers, six primary VI teachers, two members of the School Basic Committee, the Director Local Government Education Authority and six focus groups. The study used interviews, documents and focus group interview as research instruments to collect data. Data were analysed based on interpretivism paradigm which interpreted participants’ views according to the word view of the participants. The study found out that teachers have good knowledge of active learning strategies and use them in teaching English reading comprehension lessons but are faced with some daunting challenges such as non-availability of instructional materials, lack of library, lack of qualified teachers and lack of time. The study concluded that students fail woefully in English reading comprehension because teachers do not use appropriate teaching techniques. The study recommend that teachers must use active learning strategies effectively and more often during English reading comprehension, more time should be allocated for English reading comprehension, effective use of instructional materials should be considered and the government should employ specialist teachers to teach English reading comprehension.
- Full Text:
- Date Issued: 2018
Advanced high speed data and clock transmission over optical fibre for square kilometre telescope array
- Authors: Isoe, George Mosoti
- Date: 2018
- Subjects: Very large array telescopes -- South Africa , Semiconductor lasers Optical communications Optical amplifiers
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/30375 , vital:30935
- Description: There is an ever present need from Internet users for more bandwidth. This is manifested by continuous increase in bandwidth demanding applications such as 5G wireless, new end user consumer links like thunderbolt, video conferencing, high definition video-on-demand transmitted over the Internet and massive data transfers required with and within data centres for backup, storage and data processing in cloud computing. Fibre optic communications technologies are playing a pivotal role in communication, being a major enabling technology in our increasingly Internet-centric society. As network services continue to become more dynamic and diverse, Internet service providers are faced with a challenge of cost reduction in the transmission network, power and spectral efficiency as well as scalability of the optical network infrastructure to support incremental expansions and virtual machines. Intelligent design of terrestrial optical networks to allow for simultaneous signal transmission through shared network infrastructure, and the use of low cost, power efficient, high bandwidth transmitters such as vertical surface emitting lasers (VCSELs) as well as exploitation of spectral efficient in-complex advanced modulation formats is a viable approach to this situation. In this study, techniques for spectral efficiency upgrade and simultaneous transmission of data signal, reference frequency (RF) clock signal and pulse-per-second (PPS) over shared infrastructure have experimentally been optimized in a laboratory environment for adoption in next-generation telescope array networks such as the Square Kilometre Array (SKA), time keeping systems such as banking systems, Coordinated Universal Time(UTC) timing and Global Positioning Systems (GPS), as well as high capacity spectral efficient short reach optical fibre networks such as data centres. This work starts by experimentally optimizing VCSEL technology for simultaneous transmission of 10 Gbps data and 1.712 GHz RF clock signal over a single G. 655 optical fibre of length 24.75 Km at different channel spacing and different propagation direction for implementation in a cost effective next-generation telescope array network. The wavelength tuneability property of VCSEL transmitters allows for wavelength adjustment, a key requirement for simultaneous data and RF clock signal transmission over a single optical fibre. A receiver sensitivity of -19.19 dBm was experimentally achieved at back-to-back analysis. A 24.75 Km of simultaneous data and RF clock signal transmission performed at 0.4 nm channel spacing introduced a transmission penalty of 1.07 dB and 1.63 dB for counter and co-propagation scheme respectively. This work mainly utilized direct modulation and direct detection using a positive intrinsic negative (PIN) due to its simplicity and cost effectiveness. A novel modulation technique for simultaneous data and polarization-based pulse-per-second timing clock signal transmission using a single VCSEL carrier is experimentally demonstrated. Two signal types, a directly modulated 10 Gbps data signal and a polarization-based pulse per second (PPS) clock signal are modulated onto a single mode 10 GHz bandwidth VCSEL carrier at 1310 nm. Spectral efficiency is maximized by exploiting the inherent orthogonal polarization switching of the xiv VCSEL with changing bias in transmission of the PPS signal. A 10 Gbps VCSEL transmission with PPS over 11 Km of G.652 fibre introduced a transmission penalty of 0.52 dB. The contribution of PPS clock signal to this penalty was found to be 0.08 dB. A technique for simultaneous directly modulated data and phase modulated reference clock signal transmission over a signal channel in wavelength division multiplexing (WDM) solutions is experimentally demonstrated. This is to prepare solutions to the ever-increasing demand over gigabit/s, terabit/s and gigahertz capacities in WDM-based terrestrial optical fibre transmission systems such as telescope array networks. a total capacity of 30 Gbps (310 Gbps) data and 12 GHz ( 4 3 GHz) reference clock signal are multiplexed at a channel spacing of 100 GHz and simultaneously transmitted over a single mode G.655 fibre of length 24.73 Km. The recovery of the phase modulated RF clock signal using a differential delay line interferometry technique is experimentally demonstrated. A 625 Gbps (2525 Gbps) DWDM data transmission system is further implemented in simulation by multiplexing 25 channels at 25 Gbps per channel using 50 GHz channel spacing. A four level pulse amplitude modulation (4-PAM) data modulation format employing VCSELs is experimentally demonstrated for adoption in high bitrate networks such as big data science projects and data centre networks. 4-PAM offers a good trade-off between complexity, efficiency, reach, and sensitivity. A software defined digital signal processing (DSP) receiver is designed and implemented in MATLAB to recover the transmitted 4-PAM data signal cost effectively without the necessity of costly receiver hardware. A novel technique for maximizing carrier spectral efficiency through simultaneous 20 Gbps 4-PAM data and phase modulated 2 GHz RF clock signal transmission on a single mode 10 GHz bandwidth VCSEL carrier at 1310 nm is experimentally demonstrated for the first time to the best of our knowledge. Data transmission and clock stability performance of the designed high spectral efficient VCSEL-based link network is evaluated through BER curve plots, phase noise measurements and Allan variance analysis respectively. VCSEL-based Raman amplification is experimentally demonstrated as a viable approach for RF clock signal distribution in extended reach astronomical telescope array networks and other extended reach terrestrial optical fibre network application. This is achieved by adopting two pumping techniques namely forward pumping and backward pumping. A maximum on off gain of 5.7 dB and 1.5 dB was experimentally attained for forward pumping and backward pumping at 24 dBm pump power respectively, while a maximum 100.8 Km fibre transmission achieved experimentally. In summary, this study has successfully demonstrated in-complex, spectral efficient, low cost and power efficient simultaneous data signal, reference frequency (RF) clock signal and pulse-per-second (PPS) transmission techniques over shared network infrastructure. Simultaneous transmission of data, RF clock and PPS timing signal is relevant in nextgeneration telescope array networks such as the Square Kilometre Array (SKA), time keeping systems such as banking systems, Coordinated Universal Time (UTC) timing and Global Positioning Systems (GPS), as well as high capacity spectral efficient short reach optical fibre networks such as data centres.
- Full Text:
- Date Issued: 2018
- Authors: Isoe, George Mosoti
- Date: 2018
- Subjects: Very large array telescopes -- South Africa , Semiconductor lasers Optical communications Optical amplifiers
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/30375 , vital:30935
- Description: There is an ever present need from Internet users for more bandwidth. This is manifested by continuous increase in bandwidth demanding applications such as 5G wireless, new end user consumer links like thunderbolt, video conferencing, high definition video-on-demand transmitted over the Internet and massive data transfers required with and within data centres for backup, storage and data processing in cloud computing. Fibre optic communications technologies are playing a pivotal role in communication, being a major enabling technology in our increasingly Internet-centric society. As network services continue to become more dynamic and diverse, Internet service providers are faced with a challenge of cost reduction in the transmission network, power and spectral efficiency as well as scalability of the optical network infrastructure to support incremental expansions and virtual machines. Intelligent design of terrestrial optical networks to allow for simultaneous signal transmission through shared network infrastructure, and the use of low cost, power efficient, high bandwidth transmitters such as vertical surface emitting lasers (VCSELs) as well as exploitation of spectral efficient in-complex advanced modulation formats is a viable approach to this situation. In this study, techniques for spectral efficiency upgrade and simultaneous transmission of data signal, reference frequency (RF) clock signal and pulse-per-second (PPS) over shared infrastructure have experimentally been optimized in a laboratory environment for adoption in next-generation telescope array networks such as the Square Kilometre Array (SKA), time keeping systems such as banking systems, Coordinated Universal Time(UTC) timing and Global Positioning Systems (GPS), as well as high capacity spectral efficient short reach optical fibre networks such as data centres. This work starts by experimentally optimizing VCSEL technology for simultaneous transmission of 10 Gbps data and 1.712 GHz RF clock signal over a single G. 655 optical fibre of length 24.75 Km at different channel spacing and different propagation direction for implementation in a cost effective next-generation telescope array network. The wavelength tuneability property of VCSEL transmitters allows for wavelength adjustment, a key requirement for simultaneous data and RF clock signal transmission over a single optical fibre. A receiver sensitivity of -19.19 dBm was experimentally achieved at back-to-back analysis. A 24.75 Km of simultaneous data and RF clock signal transmission performed at 0.4 nm channel spacing introduced a transmission penalty of 1.07 dB and 1.63 dB for counter and co-propagation scheme respectively. This work mainly utilized direct modulation and direct detection using a positive intrinsic negative (PIN) due to its simplicity and cost effectiveness. A novel modulation technique for simultaneous data and polarization-based pulse-per-second timing clock signal transmission using a single VCSEL carrier is experimentally demonstrated. Two signal types, a directly modulated 10 Gbps data signal and a polarization-based pulse per second (PPS) clock signal are modulated onto a single mode 10 GHz bandwidth VCSEL carrier at 1310 nm. Spectral efficiency is maximized by exploiting the inherent orthogonal polarization switching of the xiv VCSEL with changing bias in transmission of the PPS signal. A 10 Gbps VCSEL transmission with PPS over 11 Km of G.652 fibre introduced a transmission penalty of 0.52 dB. The contribution of PPS clock signal to this penalty was found to be 0.08 dB. A technique for simultaneous directly modulated data and phase modulated reference clock signal transmission over a signal channel in wavelength division multiplexing (WDM) solutions is experimentally demonstrated. This is to prepare solutions to the ever-increasing demand over gigabit/s, terabit/s and gigahertz capacities in WDM-based terrestrial optical fibre transmission systems such as telescope array networks. a total capacity of 30 Gbps (310 Gbps) data and 12 GHz ( 4 3 GHz) reference clock signal are multiplexed at a channel spacing of 100 GHz and simultaneously transmitted over a single mode G.655 fibre of length 24.73 Km. The recovery of the phase modulated RF clock signal using a differential delay line interferometry technique is experimentally demonstrated. A 625 Gbps (2525 Gbps) DWDM data transmission system is further implemented in simulation by multiplexing 25 channels at 25 Gbps per channel using 50 GHz channel spacing. A four level pulse amplitude modulation (4-PAM) data modulation format employing VCSELs is experimentally demonstrated for adoption in high bitrate networks such as big data science projects and data centre networks. 4-PAM offers a good trade-off between complexity, efficiency, reach, and sensitivity. A software defined digital signal processing (DSP) receiver is designed and implemented in MATLAB to recover the transmitted 4-PAM data signal cost effectively without the necessity of costly receiver hardware. A novel technique for maximizing carrier spectral efficiency through simultaneous 20 Gbps 4-PAM data and phase modulated 2 GHz RF clock signal transmission on a single mode 10 GHz bandwidth VCSEL carrier at 1310 nm is experimentally demonstrated for the first time to the best of our knowledge. Data transmission and clock stability performance of the designed high spectral efficient VCSEL-based link network is evaluated through BER curve plots, phase noise measurements and Allan variance analysis respectively. VCSEL-based Raman amplification is experimentally demonstrated as a viable approach for RF clock signal distribution in extended reach astronomical telescope array networks and other extended reach terrestrial optical fibre network application. This is achieved by adopting two pumping techniques namely forward pumping and backward pumping. A maximum on off gain of 5.7 dB and 1.5 dB was experimentally attained for forward pumping and backward pumping at 24 dBm pump power respectively, while a maximum 100.8 Km fibre transmission achieved experimentally. In summary, this study has successfully demonstrated in-complex, spectral efficient, low cost and power efficient simultaneous data signal, reference frequency (RF) clock signal and pulse-per-second (PPS) transmission techniques over shared network infrastructure. Simultaneous transmission of data, RF clock and PPS timing signal is relevant in nextgeneration telescope array networks such as the Square Kilometre Array (SKA), time keeping systems such as banking systems, Coordinated Universal Time (UTC) timing and Global Positioning Systems (GPS), as well as high capacity spectral efficient short reach optical fibre networks such as data centres.
- Full Text:
- Date Issued: 2018