Calibration and wide field imaging with PAPER: a catalogue of compact sources
- Authors: Philip, Liju
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/2397 , vital:20285
- Description: Observations of the redshifted 21 cm HI line promise to be a formidable tool for cosmology, allowing the investigation of the end of the so-called dark ages, when the first galaxies formed, and the subsequent Epoch of Reionization when the intergalactic medium transitioned from neutral to ionized. Such observations are plagued by foreground emission which is a few orders of magnitude brighter than the 21 cm line. In this thesis I analyzed data from the Donald C. Backer Precision Array for Probing the Epoch of Reionization (PAPER) in order to improve the characterization of the extragalactic foreground component. I derived a catalogue of unresolved radio sources down to a 5 Jy flux density limit at 150 MHz and derived their spectral index distribution using literature data at 408 MHz. I implemented advanced techniques to calibrate radio interferometric data that led to a few percent accuracy on the flux density scale of the derived catalogue. This work, therefore, represents a further step towards creating an accurate, global sky model that is crucial to improve calibration of Epoch of Reionization observations.
- Full Text:
- Date Issued: 2016
- Authors: Philip, Liju
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/2397 , vital:20285
- Description: Observations of the redshifted 21 cm HI line promise to be a formidable tool for cosmology, allowing the investigation of the end of the so-called dark ages, when the first galaxies formed, and the subsequent Epoch of Reionization when the intergalactic medium transitioned from neutral to ionized. Such observations are plagued by foreground emission which is a few orders of magnitude brighter than the 21 cm line. In this thesis I analyzed data from the Donald C. Backer Precision Array for Probing the Epoch of Reionization (PAPER) in order to improve the characterization of the extragalactic foreground component. I derived a catalogue of unresolved radio sources down to a 5 Jy flux density limit at 150 MHz and derived their spectral index distribution using literature data at 408 MHz. I implemented advanced techniques to calibrate radio interferometric data that led to a few percent accuracy on the flux density scale of the derived catalogue. This work, therefore, represents a further step towards creating an accurate, global sky model that is crucial to improve calibration of Epoch of Reionization observations.
- Full Text:
- Date Issued: 2016
Can local use assist in controlling invasive alien species in tropical forests?: The case of Lantana camara in southern India
- Kannan, Ramesh, Shackleton, Charlie M, Krishnan, Smitha, Shaanker, Ramanan U
- Authors: Kannan, Ramesh , Shackleton, Charlie M , Krishnan, Smitha , Shaanker, Ramanan U
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/180423 , vital:43387 , xlink:href="https://doi.org/10.1016/j.foreco.2016.06.016"
- Description: Many invasive alien species (IAS) are used by local communities for a variety of subsistence and income generating purposes. This frequently poses a conflict of interest for their removal due to forest conservation and biodiversity concerns. However, if local use can simultaneously check or control specific IAS, the conflict can be avoided and both development and forest conservation perspectives accommodated in the short to medium term. We examine this for Lantana camara invasion in southern India through assessment of the demand for and impacts of harvesting on this globally problematic IAS. We interviewed local artisans regarding their knowledge and quantities of Lantana used, along with forest surveys to estimate Lantana densities and size classes in harvested and unharvested sites, and lastly we undertook controlled cutting in moist and dry deciduous forests in both the wet and dry seasons to examine rate of regrowth and mortality. Over the entire study area the abundance of Lantana far outweighed local demand, but at small scales around villages, density and size classes were significantly reduced through harvesting. The controlled cutting experiment showed marked seasonal differences, with the most severe cutting intensity resulting in significant mortality when Lantana plants were cut in the wet season, but with limited effect when cut in the dry season. We conclude that promoting local use of IAS may be a feasible approach in controlling them and thereby limiting their impacts in forests.
- Full Text:
- Date Issued: 2016
- Authors: Kannan, Ramesh , Shackleton, Charlie M , Krishnan, Smitha , Shaanker, Ramanan U
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/180423 , vital:43387 , xlink:href="https://doi.org/10.1016/j.foreco.2016.06.016"
- Description: Many invasive alien species (IAS) are used by local communities for a variety of subsistence and income generating purposes. This frequently poses a conflict of interest for their removal due to forest conservation and biodiversity concerns. However, if local use can simultaneously check or control specific IAS, the conflict can be avoided and both development and forest conservation perspectives accommodated in the short to medium term. We examine this for Lantana camara invasion in southern India through assessment of the demand for and impacts of harvesting on this globally problematic IAS. We interviewed local artisans regarding their knowledge and quantities of Lantana used, along with forest surveys to estimate Lantana densities and size classes in harvested and unharvested sites, and lastly we undertook controlled cutting in moist and dry deciduous forests in both the wet and dry seasons to examine rate of regrowth and mortality. Over the entire study area the abundance of Lantana far outweighed local demand, but at small scales around villages, density and size classes were significantly reduced through harvesting. The controlled cutting experiment showed marked seasonal differences, with the most severe cutting intensity resulting in significant mortality when Lantana plants were cut in the wet season, but with limited effect when cut in the dry season. We conclude that promoting local use of IAS may be a feasible approach in controlling them and thereby limiting their impacts in forests.
- Full Text:
- Date Issued: 2016
Case Studies for UNECCC, UNESCO and CEE The COPART Climate Train
- Authors: McGarry, Dylan K
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/391120 , vital:68622 , xlink:href="https://eeasa.org.za/wp-content/uploads/2017/05/EEASA-Bullitin-2016_18-July-issue-42.pdf"
- Description: To create a listening and educational platform that used various disciplines to understand the impact of Climate Change across South Africa. The objective was to create a multigenre educational space for citizens of South Africa as a means to participate in Climate discussions as an alternative to the COP17 negotiations held in South Africa at the time.
- Full Text:
- Date Issued: 2016
- Authors: McGarry, Dylan K
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/391120 , vital:68622 , xlink:href="https://eeasa.org.za/wp-content/uploads/2017/05/EEASA-Bullitin-2016_18-July-issue-42.pdf"
- Description: To create a listening and educational platform that used various disciplines to understand the impact of Climate Change across South Africa. The objective was to create a multigenre educational space for citizens of South Africa as a means to participate in Climate discussions as an alternative to the COP17 negotiations held in South Africa at the time.
- Full Text:
- Date Issued: 2016
Catering for children with special education needs in the provision of early childhood development programme in Zimbabwe : towards a holistic and inclusive framework
- Authors: Chinhara, Henry
- Date: 2016
- Subjects: Children with disabilities -- Education -- Zimbabwe Special education -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/3055 , vital:28244
- Description: The study investigated how primary schools in Chiredzi District in Zimbabwe, cater for ECD “A” and “B” children with special education needs. A mixed method design located in the pragmatism paradigm was used to carry out the study. Post-positivist is an interactive process which produced in-depth, detailed, rich data from personal perspectives and experiences that resulted in realistic understanding of phenomenon, interpreted through the social and cultural context of respondents’ lives. By adopting quantitative and qualitative approaches, the researcher was able to ensure a high level of reliability in the collected data, at the same time obtaining comprehensive information on how primary schools attaching preschool classes in Chiredzi district cater for ECD “A” and “B” children with special education needs. Purposive sampling and cluster sampling procedures were used to solicit information from ECD teachers, school heads, parents, the District Education Team, NGOs and critical government ministries through semi-structured questionnaires, face-t-face interviews, focus group discussions, observations and document analysis. The study established that, while the government carries out its mandate of providing social services to learners with special education needs, they are incapacitated due to lack of resources. The majority of schools are not providing adequate health facilities for learners with special education needs. Furthermore, most schools are not providing nutritional supplementation to vulnerable learners, situations which deprive the learners with the much needed opportunity to grow and develop to the anticipated potential. In addition, the study noted that, ECD “A” and “B” children with special education needs enrolled in classes attached to primary schools do not access Basic Education Assistance Module (BEAM) or Cash Transfers to alleviate the children that are in need. It came out that such a situation impacts on learners’ attendance and subsequently their learning outcomes. Regardless of the stipulations by international treaties on the nature of inclusive education, the study established that, the education system has not yet modified curriculum to accommodate learners with diversified forms of special education needs. The situation is made worse by the fact that, heads of schools, and teachers are not adequately trained to handle learners with special education needs in early childhood development programmes. In addition, schools face the challenge of scarcity of learning resources that support ECD learners with special education needs which seriously impact on the growth and development of young learners at this critical stage of their development. Regardless of the essence of continuous professional development programs, in schools whose purpose is to redress the professional gap in schools, the study found that the CPD are doing very little to transform the mind-set of teachers. The study concluded that learners with special education needs are not benefiting from the current inclusive education programme. The study recommends that following; Stakeholders work together to promote the health and nutritional needs including other social services of ECD learners in classes attached to primary schools. There be a national teacher in-service programme for those teachers deployed in schools, to equip them with the desired skills, and knowledge to handle learners with special education needs, especially at this critical stage of their development. Teachers’ Colleges redesign their curriculum to address inclusive education in schools. Teachers’ Colleges need to empower new graduates with skills and knowledge to handle children with special education needs in schools. Policy makers to advocate for redesigning the curriculum to include children with special education needs to ensure availability of resources in inclusive schools to alleviate the challenges faced by these children. Those policy makers should advocate for a way to ensure that all children with special education be enrolled in mainstream schools. Thus, the study proposed an alternative, holistic, and inclusive education model for schools attaching ECD “A” and “B”
- Full Text:
- Date Issued: 2016
- Authors: Chinhara, Henry
- Date: 2016
- Subjects: Children with disabilities -- Education -- Zimbabwe Special education -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/3055 , vital:28244
- Description: The study investigated how primary schools in Chiredzi District in Zimbabwe, cater for ECD “A” and “B” children with special education needs. A mixed method design located in the pragmatism paradigm was used to carry out the study. Post-positivist is an interactive process which produced in-depth, detailed, rich data from personal perspectives and experiences that resulted in realistic understanding of phenomenon, interpreted through the social and cultural context of respondents’ lives. By adopting quantitative and qualitative approaches, the researcher was able to ensure a high level of reliability in the collected data, at the same time obtaining comprehensive information on how primary schools attaching preschool classes in Chiredzi district cater for ECD “A” and “B” children with special education needs. Purposive sampling and cluster sampling procedures were used to solicit information from ECD teachers, school heads, parents, the District Education Team, NGOs and critical government ministries through semi-structured questionnaires, face-t-face interviews, focus group discussions, observations and document analysis. The study established that, while the government carries out its mandate of providing social services to learners with special education needs, they are incapacitated due to lack of resources. The majority of schools are not providing adequate health facilities for learners with special education needs. Furthermore, most schools are not providing nutritional supplementation to vulnerable learners, situations which deprive the learners with the much needed opportunity to grow and develop to the anticipated potential. In addition, the study noted that, ECD “A” and “B” children with special education needs enrolled in classes attached to primary schools do not access Basic Education Assistance Module (BEAM) or Cash Transfers to alleviate the children that are in need. It came out that such a situation impacts on learners’ attendance and subsequently their learning outcomes. Regardless of the stipulations by international treaties on the nature of inclusive education, the study established that, the education system has not yet modified curriculum to accommodate learners with diversified forms of special education needs. The situation is made worse by the fact that, heads of schools, and teachers are not adequately trained to handle learners with special education needs in early childhood development programmes. In addition, schools face the challenge of scarcity of learning resources that support ECD learners with special education needs which seriously impact on the growth and development of young learners at this critical stage of their development. Regardless of the essence of continuous professional development programs, in schools whose purpose is to redress the professional gap in schools, the study found that the CPD are doing very little to transform the mind-set of teachers. The study concluded that learners with special education needs are not benefiting from the current inclusive education programme. The study recommends that following; Stakeholders work together to promote the health and nutritional needs including other social services of ECD learners in classes attached to primary schools. There be a national teacher in-service programme for those teachers deployed in schools, to equip them with the desired skills, and knowledge to handle learners with special education needs, especially at this critical stage of their development. Teachers’ Colleges redesign their curriculum to address inclusive education in schools. Teachers’ Colleges need to empower new graduates with skills and knowledge to handle children with special education needs in schools. Policy makers to advocate for redesigning the curriculum to include children with special education needs to ensure availability of resources in inclusive schools to alleviate the challenges faced by these children. Those policy makers should advocate for a way to ensure that all children with special education be enrolled in mainstream schools. Thus, the study proposed an alternative, holistic, and inclusive education model for schools attaching ECD “A” and “B”
- Full Text:
- Date Issued: 2016
Causes of staff turnover in selected departments: province of the Eastern Cape
- Authors: Khelekethe, Eric Phathisile
- Date: 2016
- Subjects: Labor turnover -- South Africa -- Eastern Cape , Employee retention -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/8836 , vital:26434
- Description: This research focused on the impact of staff turnover in selected departments of the Province of the Eastern Cape Province. High staff turnover rate may jeopardise efforts to attain organisational objectives. In addition, `when an organisation loses a critical employee, there is a negative impact, on innovation; consistency in providing service to guests may be jeopardised, and major delays in the delivery of services to customers may occur. The research design used in this study contained elements of both the quantitative and qualitative approaches, which allowed the researcher to use structured questionnaires in data collection, on which space was provided for comments. This study was influenced and shaped by the concerns raised by a number of General Managers in the course of various provincial meetings. The main purpose of this research was to identify retention strategies that could be used by selected departments to reduce the turnover of their talented staff. The research also investigated methods to retain knowledge within departments that could possibly be lost due to a high turnover rate among talented staff. The first step used to resolve the issues discussed above was to conduct a full literature study. The literature study sought to reveal what characteristics were required in the departments that ensured that staff would be happy in those departments and remain there for a long time. The literature study also covered what knowledge management methods could be used in managing valuable knowledge. Secondly, the views of current staff and management of the selected departments on staff and knowledge management strategies were solicited in an empirical study, which involved the completion of structured questionnaires. It is the researcher’s aim that this study will, firstly, contribute to the existing body of knowledge of staff turnover and that the Provincial Departments will take into cognisance the problems that lead to employee turnover. Secondly, that it will contribute to an improvement in employee working conditions in various Provincial Government departments.
- Full Text:
- Date Issued: 2016
- Authors: Khelekethe, Eric Phathisile
- Date: 2016
- Subjects: Labor turnover -- South Africa -- Eastern Cape , Employee retention -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/8836 , vital:26434
- Description: This research focused on the impact of staff turnover in selected departments of the Province of the Eastern Cape Province. High staff turnover rate may jeopardise efforts to attain organisational objectives. In addition, `when an organisation loses a critical employee, there is a negative impact, on innovation; consistency in providing service to guests may be jeopardised, and major delays in the delivery of services to customers may occur. The research design used in this study contained elements of both the quantitative and qualitative approaches, which allowed the researcher to use structured questionnaires in data collection, on which space was provided for comments. This study was influenced and shaped by the concerns raised by a number of General Managers in the course of various provincial meetings. The main purpose of this research was to identify retention strategies that could be used by selected departments to reduce the turnover of their talented staff. The research also investigated methods to retain knowledge within departments that could possibly be lost due to a high turnover rate among talented staff. The first step used to resolve the issues discussed above was to conduct a full literature study. The literature study sought to reveal what characteristics were required in the departments that ensured that staff would be happy in those departments and remain there for a long time. The literature study also covered what knowledge management methods could be used in managing valuable knowledge. Secondly, the views of current staff and management of the selected departments on staff and knowledge management strategies were solicited in an empirical study, which involved the completion of structured questionnaires. It is the researcher’s aim that this study will, firstly, contribute to the existing body of knowledge of staff turnover and that the Provincial Departments will take into cognisance the problems that lead to employee turnover. Secondly, that it will contribute to an improvement in employee working conditions in various Provincial Government departments.
- Full Text:
- Date Issued: 2016
Challenges faced by professional nurses in implementing the six Ministerial priority standards of care in a Health care institution in O R Tambo Region in the Eastern Cape province
- Authors: Kula, Nokuseni
- Date: 2016
- Subjects: Health care standards -- Hospital
- Language: English
- Type: Thesis , Masters , M Cur
- Identifier: http://hdl.handle.net/11260/699 , vital:27770
- Description: The objective of this research study was to describe and explore challenges faced by professional nurses in implementing six ministerial priority standards of care in selected units of an identified institution in O.R. Tambo region. Nurses are trained and employed to provide nursing care to patients according to scope of practice set by their statutory body (South African Nursing Council). Setting of standards forms part of quality improvement in nursing care and standards need to be monitored and evaluated (Muller 2006:206). In South Africa, the Minister of Health has identified six priority areas to fast-track improvement and ensure quality in health services. These priority areas are as follows: attitudes and values of health workers, cleanliness of the facility, waiting times, patient safety and security, infection prevention and control, and availability of medicines (National Health Plan: Strategic plan 2010/2013). Standard of nursing care in OR Tambo region according to available statistics, is lower than the expected ministerial standards, regardless of continued monitoring and evaluation. Staff attitudes is an ongoing problem, long queues, linen shortages, low standards of cleanliness as well as shortage of medication remain a challenge in health care institutions. This study is a qualitative, descriptive, exploratory, and contextual study that explored challenges faced by professional nurses in implementing the six ministerial priority standards of care. A purposive sampling of 10 professional nurses, meeting the selection criteria was utilised. In depth, semi structured interviews were used as a method of data collection. A digital voice recorder was used to record the interviews and consent from participants was obtained. Ethical considerations were adhered to. The interview question was: “What challenges are you facing in implementing expected standards of care with reference to the six ministerial priority standards of care?” Data was analysed using content thematic analysis approach. An independent coder with a Master’s degree and studying towards a doctorate helped with coding the results of the interviews. The Theory for Health Promotion in nursing as propounded by Botes (2006) was used to analyse the findings. The approach used was based on the external environment and its dimensions – social, physical and intellectual. v The findings of the research revealed the following themes: Lack of resources, demotivation of nurses, attitude of nurses, lack of monitoring and evaluation, environment and overcrowding, lack of patient safety, negligence, availability of policy and procedure manuals, and incompetency of health care professionals. The findings of this study revealed that nurses faced many challenges with regard to improving the standard of nursing care. According to Botes (2006), the purpose of nursing research is functional by nature, it provides guidelines for practice. Therefore in this study, a description of guidelines to improve nursing care has been done. Trustworthiness of the findings was ensured by utilising Lincoln and Guba’s model of trustworthiness. Limitations of the research are highlighted and recommendations for further and related studies are made.
- Full Text:
- Date Issued: 2016
- Authors: Kula, Nokuseni
- Date: 2016
- Subjects: Health care standards -- Hospital
- Language: English
- Type: Thesis , Masters , M Cur
- Identifier: http://hdl.handle.net/11260/699 , vital:27770
- Description: The objective of this research study was to describe and explore challenges faced by professional nurses in implementing six ministerial priority standards of care in selected units of an identified institution in O.R. Tambo region. Nurses are trained and employed to provide nursing care to patients according to scope of practice set by their statutory body (South African Nursing Council). Setting of standards forms part of quality improvement in nursing care and standards need to be monitored and evaluated (Muller 2006:206). In South Africa, the Minister of Health has identified six priority areas to fast-track improvement and ensure quality in health services. These priority areas are as follows: attitudes and values of health workers, cleanliness of the facility, waiting times, patient safety and security, infection prevention and control, and availability of medicines (National Health Plan: Strategic plan 2010/2013). Standard of nursing care in OR Tambo region according to available statistics, is lower than the expected ministerial standards, regardless of continued monitoring and evaluation. Staff attitudes is an ongoing problem, long queues, linen shortages, low standards of cleanliness as well as shortage of medication remain a challenge in health care institutions. This study is a qualitative, descriptive, exploratory, and contextual study that explored challenges faced by professional nurses in implementing the six ministerial priority standards of care. A purposive sampling of 10 professional nurses, meeting the selection criteria was utilised. In depth, semi structured interviews were used as a method of data collection. A digital voice recorder was used to record the interviews and consent from participants was obtained. Ethical considerations were adhered to. The interview question was: “What challenges are you facing in implementing expected standards of care with reference to the six ministerial priority standards of care?” Data was analysed using content thematic analysis approach. An independent coder with a Master’s degree and studying towards a doctorate helped with coding the results of the interviews. The Theory for Health Promotion in nursing as propounded by Botes (2006) was used to analyse the findings. The approach used was based on the external environment and its dimensions – social, physical and intellectual. v The findings of the research revealed the following themes: Lack of resources, demotivation of nurses, attitude of nurses, lack of monitoring and evaluation, environment and overcrowding, lack of patient safety, negligence, availability of policy and procedure manuals, and incompetency of health care professionals. The findings of this study revealed that nurses faced many challenges with regard to improving the standard of nursing care. According to Botes (2006), the purpose of nursing research is functional by nature, it provides guidelines for practice. Therefore in this study, a description of guidelines to improve nursing care has been done. Trustworthiness of the findings was ensured by utilising Lincoln and Guba’s model of trustworthiness. Limitations of the research are highlighted and recommendations for further and related studies are made.
- Full Text:
- Date Issued: 2016
Challenges facing the teaching and learning of accounting in Secondary Schools of the Mthatha Education District
- Authors: Susani, Mongezi
- Date: 2016
- Subjects: Teaching and learning -- Accounting Secondary education -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: http://hdl.handle.net/11260/494 , vital:27278
- Description: The purpose of this study was to examine the challenges facing the teaching and learning of Accounting in secondary schools of the Mthatha education district. There are 69 secondary schools that offer Accounting in the Mthatha education district. In order to attain the objectives and fulfil the aim of the study, the researcher used the qualitative research approach, both in collecting and analysing the data. The case study design was used to describe and access the phenomenon of challenges facing the teaching and learning of Accounting in the Mthatha education district. Convenience sampling method was used to select twelve Accounting teachers from six different secondary schools in the Mthatha education district. Face-to-face in-depth interviews and non-participant observation were used to collect the data. Themes were drawn from the responses of the participants and these were analysed. The study revealed the following factors as challenges facing the teaching and learning of Accounting in secondary schools of the Mthatha education district: Teachers had professional qualifications in teaching, but fewer of them had Accounting as subject of their specialisation. Frequency of workshops was identified as a challenge by interviewed teachers. The study revealed that teachers are unfamiliar with the content to teach, and as a result, they are unable to develop the learner guides. The study found that teachers are using insufficient LTSM to teach Accounting. Instructional strategies used by teachers for teaching and learning of Accounting affected the process of teaching and learning of this subject. Redeployment is a challenge that affects the capacity of schools in the teaching and learning of Accounting. The study also revealed that there is a lack of parental involvement and support in the education of their children, which negatively affects the teaching and learning of Accounting. Limited commitment from teachers and learners was also revealed as one of the challenges in teaching and learning Accounting. The researcher made recommendations towards mitigating the effects of the challenges in teaching and learning of Accounting.
- Full Text:
- Date Issued: 2016
- Authors: Susani, Mongezi
- Date: 2016
- Subjects: Teaching and learning -- Accounting Secondary education -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: http://hdl.handle.net/11260/494 , vital:27278
- Description: The purpose of this study was to examine the challenges facing the teaching and learning of Accounting in secondary schools of the Mthatha education district. There are 69 secondary schools that offer Accounting in the Mthatha education district. In order to attain the objectives and fulfil the aim of the study, the researcher used the qualitative research approach, both in collecting and analysing the data. The case study design was used to describe and access the phenomenon of challenges facing the teaching and learning of Accounting in the Mthatha education district. Convenience sampling method was used to select twelve Accounting teachers from six different secondary schools in the Mthatha education district. Face-to-face in-depth interviews and non-participant observation were used to collect the data. Themes were drawn from the responses of the participants and these were analysed. The study revealed the following factors as challenges facing the teaching and learning of Accounting in secondary schools of the Mthatha education district: Teachers had professional qualifications in teaching, but fewer of them had Accounting as subject of their specialisation. Frequency of workshops was identified as a challenge by interviewed teachers. The study revealed that teachers are unfamiliar with the content to teach, and as a result, they are unable to develop the learner guides. The study found that teachers are using insufficient LTSM to teach Accounting. Instructional strategies used by teachers for teaching and learning of Accounting affected the process of teaching and learning of this subject. Redeployment is a challenge that affects the capacity of schools in the teaching and learning of Accounting. The study also revealed that there is a lack of parental involvement and support in the education of their children, which negatively affects the teaching and learning of Accounting. Limited commitment from teachers and learners was also revealed as one of the challenges in teaching and learning Accounting. The researcher made recommendations towards mitigating the effects of the challenges in teaching and learning of Accounting.
- Full Text:
- Date Issued: 2016
Challenges facing water supply in the Polokwane Municipality, Mankweng Cluster
- Authors: Mashego, Irene Lerato
- Date: 2016
- Subjects: Municipal water supply -- South Africa -- Polokwane , Rural public utilities -- South Africa -- Polokwane
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/8109 , vital:25007
- Description: Polokwane Local Municipality is one of many municipalities in South Africa experiencing challenges of providing potable water services to their local residents. Residents’ dissatisfaction about poor potable water services have manifested in community protests. The study, which looks at the communities’ experience within the Makweng Cluster, aims to assess the main constraints facing Polokwane Local Municipality in providing potable water to the Mankweng Cluster.
- Full Text:
- Date Issued: 2016
- Authors: Mashego, Irene Lerato
- Date: 2016
- Subjects: Municipal water supply -- South Africa -- Polokwane , Rural public utilities -- South Africa -- Polokwane
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/8109 , vital:25007
- Description: Polokwane Local Municipality is one of many municipalities in South Africa experiencing challenges of providing potable water services to their local residents. Residents’ dissatisfaction about poor potable water services have manifested in community protests. The study, which looks at the communities’ experience within the Makweng Cluster, aims to assess the main constraints facing Polokwane Local Municipality in providing potable water to the Mankweng Cluster.
- Full Text:
- Date Issued: 2016
Change management in local government : a case study of Buffalo City Metropolitan Municipality (2009-2011)
- Authors: Kwakweni, A
- Date: 2016
- Subjects: Local government -- South Africa -- Eastern Cape Organizational change -- South Africa -- Management
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/2216 , vital:27707
- Description: The main objective of this study was to explore how change can be understood fromthe change management perspective, especially in the local sphere of government. The study looked specifically at the Buffalo City Metropolitan Municipality journey through a significant shift or transition from a category B to Category A municipality during the 2011 Local Government elections. Based on change theory and a selected change management model, the framework for change management and issues related to it were constructed. Additionally, a synthesis of the most important phases and interventions in a strategic change process or project was created. The phases included: starting point, planning, implementation and evaluation, and securing. Various literature sources were consulted during the study. Inter alia, these included Lewin’s change management model, which states that change has to follow three stages—including, unfreezing, moving and refreezing. All these stages by Lewin(1951) emphasise the critical management role in driving planned or proactive change in order to address the likely emergence of resistance by observing a systematic process. A qualitative approach was utilized in order to solicit in-depth information using a structured questionnaire. Respondents were visited by the researcher in their offices, to gather data. To this effect, a total 25 respondents from the top management, councillors and middle management were sampled and interviewed accordingly. According to the findings of this study, important change management phases were recognized through researching theoretical literature—starting, planning and implementation phases. Empirical information at the starting phase involves analysis of the current and desired states and the need for change accompanied by guiding coalitions. In the planning phase, the most important interventions is project formulation, action plan development, analysis of prior and current strategic change initiatives and organizational structure analysis. In the change implementation phase the interventions of importance are the launch, quick-wins, creation of a sense of urgency, management of change resistance and communication of the change.
- Full Text:
- Date Issued: 2016
- Authors: Kwakweni, A
- Date: 2016
- Subjects: Local government -- South Africa -- Eastern Cape Organizational change -- South Africa -- Management
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/2216 , vital:27707
- Description: The main objective of this study was to explore how change can be understood fromthe change management perspective, especially in the local sphere of government. The study looked specifically at the Buffalo City Metropolitan Municipality journey through a significant shift or transition from a category B to Category A municipality during the 2011 Local Government elections. Based on change theory and a selected change management model, the framework for change management and issues related to it were constructed. Additionally, a synthesis of the most important phases and interventions in a strategic change process or project was created. The phases included: starting point, planning, implementation and evaluation, and securing. Various literature sources were consulted during the study. Inter alia, these included Lewin’s change management model, which states that change has to follow three stages—including, unfreezing, moving and refreezing. All these stages by Lewin(1951) emphasise the critical management role in driving planned or proactive change in order to address the likely emergence of resistance by observing a systematic process. A qualitative approach was utilized in order to solicit in-depth information using a structured questionnaire. Respondents were visited by the researcher in their offices, to gather data. To this effect, a total 25 respondents from the top management, councillors and middle management were sampled and interviewed accordingly. According to the findings of this study, important change management phases were recognized through researching theoretical literature—starting, planning and implementation phases. Empirical information at the starting phase involves analysis of the current and desired states and the need for change accompanied by guiding coalitions. In the planning phase, the most important interventions is project formulation, action plan development, analysis of prior and current strategic change initiatives and organizational structure analysis. In the change implementation phase the interventions of importance are the launch, quick-wins, creation of a sense of urgency, management of change resistance and communication of the change.
- Full Text:
- Date Issued: 2016
Change management: transformational issues in South-African rugby
- Authors: Erasmus, Innis
- Date: 2016
- Subjects: Organizational change -- Management Sports administration , Rugby football -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/46320 , vital:39547
- Description: The history of the sport rugby evolved from a football game more than a century ago, in England, in a town called Rugby when a young boy by the name of William Webb Ellis picked up the ball and ran to score a try. In the last two decades in South Africa the transformation process in getting more players of colour in the national team has become a real big issue. The fast changing society since 1995, the year in which the Springboks won their first Rugby World Cup, is according to government and critics not represented in the senior national side. Change management is a business management approach to implement procedures to deal with changes and to be able to reach the desired future state by profiting from the changing opportunities. SARU wants to address these issues and changes with their Strategic Transformational Plan. The purpose of this treatise was to study the perception of the junior players on the changes in rugby and the STP. The key drivers which will have influences on change management within the sport organisation were examined by the research. With the research objectives in mind a literature review was performed to create and develop a hypothesized model, which could be tested by the design of a measuring instrument which collected quantitative data for statistical results and analysis. The interpretation of the results of the research showed that Engagement, Coaching and Mentoring, Medical and Healthcare, Education/Schooling and Culture have positive associations and influences on change management. Transformational plans, Conditioning and nutrition’s relationship with change management and influences were accepted for the null hypotheses. Finally, change management and the various issues of transformation in SA Rugby showed to be valuable, measurable to a certain extent, and its recommendations actionable. The practical significant differences between the perceptions of the race groups (White, Coloured and African) illustrated valuable information for future communications and possible studies. This study and its proposed model on change management was a benefit to all the stakeholders and sport organisation going through changes and transformation in South Africa.
- Full Text:
- Date Issued: 2016
- Authors: Erasmus, Innis
- Date: 2016
- Subjects: Organizational change -- Management Sports administration , Rugby football -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/46320 , vital:39547
- Description: The history of the sport rugby evolved from a football game more than a century ago, in England, in a town called Rugby when a young boy by the name of William Webb Ellis picked up the ball and ran to score a try. In the last two decades in South Africa the transformation process in getting more players of colour in the national team has become a real big issue. The fast changing society since 1995, the year in which the Springboks won their first Rugby World Cup, is according to government and critics not represented in the senior national side. Change management is a business management approach to implement procedures to deal with changes and to be able to reach the desired future state by profiting from the changing opportunities. SARU wants to address these issues and changes with their Strategic Transformational Plan. The purpose of this treatise was to study the perception of the junior players on the changes in rugby and the STP. The key drivers which will have influences on change management within the sport organisation were examined by the research. With the research objectives in mind a literature review was performed to create and develop a hypothesized model, which could be tested by the design of a measuring instrument which collected quantitative data for statistical results and analysis. The interpretation of the results of the research showed that Engagement, Coaching and Mentoring, Medical and Healthcare, Education/Schooling and Culture have positive associations and influences on change management. Transformational plans, Conditioning and nutrition’s relationship with change management and influences were accepted for the null hypotheses. Finally, change management and the various issues of transformation in SA Rugby showed to be valuable, measurable to a certain extent, and its recommendations actionable. The practical significant differences between the perceptions of the race groups (White, Coloured and African) illustrated valuable information for future communications and possible studies. This study and its proposed model on change management was a benefit to all the stakeholders and sport organisation going through changes and transformation in South Africa.
- Full Text:
- Date Issued: 2016
Changing planets and climates in select fantastic literature
- Authors: Ward, Brendan
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/3994 , vital:20578
- Description: This thesis is concerned with literature’s engagement with the environment, specifically ecosystems and climate change. Literature of the fantastic, works that break from the tradition of mimetic literature and the limits of realism, are the focus of this thesis, which argues, alongside ecocriticism, that literature must be part of the interdisciplinary drive towards greater ecological awareness. Speculative literature adds fantastic elements or draws on scientific extrapolations into the future, and offers a platform to engage with the science of environmental issues alongside philosophical engagements with the relationship between humans and the more-than-human world around them. This thesis draws on ecocriticism to examine the role of reading and criticism in constructing more ecologically sustainable societies. From this position, it asks how fantasy can be used to convey these themes. As a result, this thesis is interested in definitions of fantasy, drawing on science fiction and fantasy to examine Kathryn Hume’s framework of the fantastic impulse. Placing fantastic texts on two axes, Hume examines the ways texts support or subvert the reader’s expectations, and encourage or discourage reflection on their extratextual worlds. This thesis contends that, texts that encourage engagement are most transformative, but that the spectrum of engagement and disengagement challenges authors to navigate between didacticism and emotive imagery. To show this, this thesis examines four series of novels drawing on the fantastic impulse. Frank Herbert’s Dune Chronicles, Kim Stanley Robinson’s Mars Trilogy and Science in the Capital, and George R.R. Martin’s A Song of Ice and Fire. The first two are on opposite ends of both of Hume’s axes, and imagine the challenges of constructing Earth-like ecosystems on other planets, asking questions about the sustainability of such a project as well as the possibilities of transforming society. The latter two engage with rapid climate change, Robinson’s looking at contemporary climate change and Martin’s engaging with historical climate change. They interrogate the impact of the climate on human and more- than-human life, and reveal the tension between comforting didactic revisions of human- environment interactions and framework-disturbing alternate ways of relating to the environment. This tension is where the fantastic is powerful, allowing alternate visions to pierce sceptical readers’ defences.
- Full Text:
- Date Issued: 2016
- Authors: Ward, Brendan
- Date: 2016
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/3994 , vital:20578
- Description: This thesis is concerned with literature’s engagement with the environment, specifically ecosystems and climate change. Literature of the fantastic, works that break from the tradition of mimetic literature and the limits of realism, are the focus of this thesis, which argues, alongside ecocriticism, that literature must be part of the interdisciplinary drive towards greater ecological awareness. Speculative literature adds fantastic elements or draws on scientific extrapolations into the future, and offers a platform to engage with the science of environmental issues alongside philosophical engagements with the relationship between humans and the more-than-human world around them. This thesis draws on ecocriticism to examine the role of reading and criticism in constructing more ecologically sustainable societies. From this position, it asks how fantasy can be used to convey these themes. As a result, this thesis is interested in definitions of fantasy, drawing on science fiction and fantasy to examine Kathryn Hume’s framework of the fantastic impulse. Placing fantastic texts on two axes, Hume examines the ways texts support or subvert the reader’s expectations, and encourage or discourage reflection on their extratextual worlds. This thesis contends that, texts that encourage engagement are most transformative, but that the spectrum of engagement and disengagement challenges authors to navigate between didacticism and emotive imagery. To show this, this thesis examines four series of novels drawing on the fantastic impulse. Frank Herbert’s Dune Chronicles, Kim Stanley Robinson’s Mars Trilogy and Science in the Capital, and George R.R. Martin’s A Song of Ice and Fire. The first two are on opposite ends of both of Hume’s axes, and imagine the challenges of constructing Earth-like ecosystems on other planets, asking questions about the sustainability of such a project as well as the possibilities of transforming society. The latter two engage with rapid climate change, Robinson’s looking at contemporary climate change and Martin’s engaging with historical climate change. They interrogate the impact of the climate on human and more- than-human life, and reveal the tension between comforting didactic revisions of human- environment interactions and framework-disturbing alternate ways of relating to the environment. This tension is where the fantastic is powerful, allowing alternate visions to pierce sceptical readers’ defences.
- Full Text:
- Date Issued: 2016
Changing practices, changing values?: a Bernsteinian analysis of knowledge production and knowledge exchange in two UK universities
- Little, Brenda, Abbas, Andrea, Singh, Mala
- Authors: Little, Brenda , Abbas, Andrea , Singh, Mala
- Date: 2016
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/66934 , vital:29002 , https://doi.org/10.1007/978-94-017-7369-0_8
- Description: publisher version , Bernstein’s concept of classification and framing links notions of knowledge, democracy and social justice, providing a perspective from which to address critical questions of what knowledge is produced, who has access to it, and how knowledge is distributed. Bernstein’s conceptual framework is used to inform an analysis of national policies steering knowledge production and knowledge transfer in the UK, and the changing practices and values associated with knowledge production and knowledge transfer in two UK institutional case study universities. The analysis reveals how reputational and financial consequences of the formal assessment of research quality interacts with the institutional and disciplinary contexts of research units to differently shape what knowledge is valued and produced, and with whom it is shared. Five discursive areas, each involving a complex set of classifications (power) and framings (control) are identified, namely: the national research assessment framework; the economic value of research; discourses of social and academic values; academic freedoms; and mixed-discipline research and the interdisciplinary nature of real world problems. Though competing and sometimes contradictory values seem to underlie academics’ knowledge work, it seems that the strong framing for knowledge production and knowledge exchange provided by national policies steers staff efforts towards economised codes of knowledge. The conclusion suggests that such a strong steer does not value social transformation in all its diverse non-economistic dimensions and limits universities’ potential to transform societies to further social justice.
- Full Text: false
- Date Issued: 2016
- Authors: Little, Brenda , Abbas, Andrea , Singh, Mala
- Date: 2016
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/66934 , vital:29002 , https://doi.org/10.1007/978-94-017-7369-0_8
- Description: publisher version , Bernstein’s concept of classification and framing links notions of knowledge, democracy and social justice, providing a perspective from which to address critical questions of what knowledge is produced, who has access to it, and how knowledge is distributed. Bernstein’s conceptual framework is used to inform an analysis of national policies steering knowledge production and knowledge transfer in the UK, and the changing practices and values associated with knowledge production and knowledge transfer in two UK institutional case study universities. The analysis reveals how reputational and financial consequences of the formal assessment of research quality interacts with the institutional and disciplinary contexts of research units to differently shape what knowledge is valued and produced, and with whom it is shared. Five discursive areas, each involving a complex set of classifications (power) and framings (control) are identified, namely: the national research assessment framework; the economic value of research; discourses of social and academic values; academic freedoms; and mixed-discipline research and the interdisciplinary nature of real world problems. Though competing and sometimes contradictory values seem to underlie academics’ knowledge work, it seems that the strong framing for knowledge production and knowledge exchange provided by national policies steers staff efforts towards economised codes of knowledge. The conclusion suggests that such a strong steer does not value social transformation in all its diverse non-economistic dimensions and limits universities’ potential to transform societies to further social justice.
- Full Text: false
- Date Issued: 2016
Characterisation of selected municipal organic waste for energy conversion through gasification
- Authors: Ngubelanga, Nolitha
- Date: 2016
- Subjects: Biomass gasification Sewage -- Purification Biomass energy Renewable energy sources
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/11020 , vital:36682
- Description: Biomass gasification has become a study of great interest over the years and plant biomass with cellulose, hemicellulose, and lignin found to be an ideal resource for conversion into heat and power through thermochemical processes such as gasification. The inadequate supply of the energy in the country has become critical with the national energy provider struggling to meet the energy demands of the ever growing population of South Africa. The depletion of natural resources and the unstable prices as well as the cost of transporting the fuels together with the environmental effects of burning fossil fuels are contributing factors to the energy crisis. Alternative sources of energy that are locally available, sustainable, and environmentally friendly are presently in demand as municipal organic wastes has been considered a source of renewable energy with gasification deemed one of the leading edge technologies to harness the energy. This research only studied the characteristics and kinetics of selected municipal organic waste including decaying wood, tomatoes, onions, cabbage, butternut and bones. The research did not involve the gasification process because of expenses associated with gasification processes, however, this has been considered as future studies under the conditions of available resources to carry out the actual gasification experiments. The characteristics of selected municipal organic wastes for energy conversion through gasification were actually investigated in this study and the implication of the value of each property interpreted in relation to gasification with specific reference to information available in the literature. Proximate analysis conducted on the wastes indicate that the physical properties in terms of the weight percentages of moisture, volatile matter fixed carbon and ash contents of the wastes vary considerably, especially with regards to the last three properties. The reason for this wide variation was attributed to the source of the wastes and the standard of living of the people vi in the area where the wastes were collected. However, the values obtained for these properties are within limits for the wastes to be adequately used as feedstocks in a gasification process, except for their content of ash, which was significantly high in all of the wastes for the aforementioned reasons. The ultimate analysis of the wastes as determined using the Energy Dispersive X-ray spectroscopy gave the percentage composition of the chemical elements present in the wastes, which suggest that carbon is the chief elemental constituent of the wastes. The highest carbon content of about 47% was recorded for bone due again to the reasons previously adduced. According to McKendry, 2002, the high carbon content of the wastes implies increased calorific value as well as increased gas production during gasification. A number of ash–forming elements were also found in the wastes, which included magnesium and potassium in low concentrations that does not pose any technical challenges during gasification, although their concentration may increase under high temperature gasification, which may equally result to some catalytic effect that would contribute to the overall gasification efficiency (Anukam et al., 2016). Calorific value analysis also suggests that the wastes contain reasonable amount of energy that can be converted to useful energy through gasification. Although, variation in calorific value was also noted, the highest calorific value of about 18 MJ/kg was recoded for bones, which correlates its data on the highest carbon content of all wastes. However, the data on the calorific value of the wastes suggests that the wastes are well suited for gasification by virtue of their calorific value. FTIR analysis revealed the major functional groups present in the internal structure of the wastes. The common functional groups observed were the OH group found in the band around 3600–3400cm-1 for most of the wastes; the C–H stretching band at 2970-2780 cm-1; and the C–O as well as the C–O–C observed in the region of 1740–1710 cm-1 and 1250-1220 cm-1 for all samples, respectively. Most functional group in the internal structures of gasification feedstocks function to facilitate faster vii rates of reaction and consequently faster rates of gasification that contributes to optimum efficiency under any conditions of gasification (Anukam et al., 2016). While thermogravimetric analysis established thermal parameters that are likely to have positive influence on the gasification of the wastes, kinetic investigation revealed two parameters that may also impact on the gasification of the wastes. These are activation energy and pre–exponential factor, which were found to be in good agreement with the values obtained in the literature even though variation in these parameters was noted. The values obtained for activation energy and pre–exponential factor using the Kissinger method of kinetic analysis showed a far less value for these two parameters when compared to commonly used feedstocks like wood and coal. This was a reason attributed to the chemical characteristics of the wastes, mainly their lower content of carbon compared to these two (wood and coal) commonly used fuels.
- Full Text:
- Date Issued: 2016
- Authors: Ngubelanga, Nolitha
- Date: 2016
- Subjects: Biomass gasification Sewage -- Purification Biomass energy Renewable energy sources
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/11020 , vital:36682
- Description: Biomass gasification has become a study of great interest over the years and plant biomass with cellulose, hemicellulose, and lignin found to be an ideal resource for conversion into heat and power through thermochemical processes such as gasification. The inadequate supply of the energy in the country has become critical with the national energy provider struggling to meet the energy demands of the ever growing population of South Africa. The depletion of natural resources and the unstable prices as well as the cost of transporting the fuels together with the environmental effects of burning fossil fuels are contributing factors to the energy crisis. Alternative sources of energy that are locally available, sustainable, and environmentally friendly are presently in demand as municipal organic wastes has been considered a source of renewable energy with gasification deemed one of the leading edge technologies to harness the energy. This research only studied the characteristics and kinetics of selected municipal organic waste including decaying wood, tomatoes, onions, cabbage, butternut and bones. The research did not involve the gasification process because of expenses associated with gasification processes, however, this has been considered as future studies under the conditions of available resources to carry out the actual gasification experiments. The characteristics of selected municipal organic wastes for energy conversion through gasification were actually investigated in this study and the implication of the value of each property interpreted in relation to gasification with specific reference to information available in the literature. Proximate analysis conducted on the wastes indicate that the physical properties in terms of the weight percentages of moisture, volatile matter fixed carbon and ash contents of the wastes vary considerably, especially with regards to the last three properties. The reason for this wide variation was attributed to the source of the wastes and the standard of living of the people vi in the area where the wastes were collected. However, the values obtained for these properties are within limits for the wastes to be adequately used as feedstocks in a gasification process, except for their content of ash, which was significantly high in all of the wastes for the aforementioned reasons. The ultimate analysis of the wastes as determined using the Energy Dispersive X-ray spectroscopy gave the percentage composition of the chemical elements present in the wastes, which suggest that carbon is the chief elemental constituent of the wastes. The highest carbon content of about 47% was recorded for bone due again to the reasons previously adduced. According to McKendry, 2002, the high carbon content of the wastes implies increased calorific value as well as increased gas production during gasification. A number of ash–forming elements were also found in the wastes, which included magnesium and potassium in low concentrations that does not pose any technical challenges during gasification, although their concentration may increase under high temperature gasification, which may equally result to some catalytic effect that would contribute to the overall gasification efficiency (Anukam et al., 2016). Calorific value analysis also suggests that the wastes contain reasonable amount of energy that can be converted to useful energy through gasification. Although, variation in calorific value was also noted, the highest calorific value of about 18 MJ/kg was recoded for bones, which correlates its data on the highest carbon content of all wastes. However, the data on the calorific value of the wastes suggests that the wastes are well suited for gasification by virtue of their calorific value. FTIR analysis revealed the major functional groups present in the internal structure of the wastes. The common functional groups observed were the OH group found in the band around 3600–3400cm-1 for most of the wastes; the C–H stretching band at 2970-2780 cm-1; and the C–O as well as the C–O–C observed in the region of 1740–1710 cm-1 and 1250-1220 cm-1 for all samples, respectively. Most functional group in the internal structures of gasification feedstocks function to facilitate faster vii rates of reaction and consequently faster rates of gasification that contributes to optimum efficiency under any conditions of gasification (Anukam et al., 2016). While thermogravimetric analysis established thermal parameters that are likely to have positive influence on the gasification of the wastes, kinetic investigation revealed two parameters that may also impact on the gasification of the wastes. These are activation energy and pre–exponential factor, which were found to be in good agreement with the values obtained in the literature even though variation in these parameters was noted. The values obtained for activation energy and pre–exponential factor using the Kissinger method of kinetic analysis showed a far less value for these two parameters when compared to commonly used feedstocks like wood and coal. This was a reason attributed to the chemical characteristics of the wastes, mainly their lower content of carbon compared to these two (wood and coal) commonly used fuels.
- Full Text:
- Date Issued: 2016
Characterisation of the dietary relationships of two sympatric hake species, Merluccius capensis and M. paradoxus, in the northern Benguela region using fatty acid profiles
- Iitembu, Johannes A, Richoux, Nicole B
- Authors: Iitembu, Johannes A , Richoux, Nicole B
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/456010 , vital:75475 , xlink:href="https://doi.org/10.2989/1814232X.2015.1115778"
- Description: The two sympatric species of Cape hake, Merluccius capensis and M. paradoxus, have been the main targets of bottom-trawl fisheries off Namibia for several decades. The feeding ecology of these hakes has been studied mainly using stomach content analyses and thus there remain some gaps in our knowledge about food assimilated over the longer term. In this study, we used fatty acid (FA) profiles to characterise the dietary relationships of M. capensis and M. paradoxus. Muscle samples from hake (n=110) and their known prey (n=68) were collected during trawl surveys off Namibia during 2011. Significant differences between the neutral FA profiles of the hake populations were detected in December 2011 but not in January 2011, an indication of temporal variations in diet and resource partitioning. Comparisons of the neutral FAs in hake and the total FAs of potential prey showed no clear trophic connections, with the exception of flying squid Todarodes sagittatus, which had FA profiles very similar to those of M. paradoxus in December 2011. Our results highlight the complex and temporally shifting relationships that exist between hake and the large pool of prey available to them, and between the two hake species that overlap in their feeding habits and distribution within the highly productive Benguela Current region.
- Full Text:
- Date Issued: 2016
- Authors: Iitembu, Johannes A , Richoux, Nicole B
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/456010 , vital:75475 , xlink:href="https://doi.org/10.2989/1814232X.2015.1115778"
- Description: The two sympatric species of Cape hake, Merluccius capensis and M. paradoxus, have been the main targets of bottom-trawl fisheries off Namibia for several decades. The feeding ecology of these hakes has been studied mainly using stomach content analyses and thus there remain some gaps in our knowledge about food assimilated over the longer term. In this study, we used fatty acid (FA) profiles to characterise the dietary relationships of M. capensis and M. paradoxus. Muscle samples from hake (n=110) and their known prey (n=68) were collected during trawl surveys off Namibia during 2011. Significant differences between the neutral FA profiles of the hake populations were detected in December 2011 but not in January 2011, an indication of temporal variations in diet and resource partitioning. Comparisons of the neutral FAs in hake and the total FAs of potential prey showed no clear trophic connections, with the exception of flying squid Todarodes sagittatus, which had FA profiles very similar to those of M. paradoxus in December 2011. Our results highlight the complex and temporally shifting relationships that exist between hake and the large pool of prey available to them, and between the two hake species that overlap in their feeding habits and distribution within the highly productive Benguela Current region.
- Full Text:
- Date Issued: 2016
Characterisation of the production and consumption of milk in the communal livestock production sector of the Eastern Cape Province, South Africa
- Authors: Kumbirai, Kaguru Tinashe
- Date: 2016
- Subjects: Milk consumption -- South Africa -- Eastern Cape Dairy farming -- Economic aspects -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/3066 , vital:28251
- Description: The study was conducted in Eastern Cape Province, South Africa with the objective of characterising milk production and consumption among the communal households. A pretested semi-structured questionnaire was used to collect data through a single visit survey between June 2014 and May 2015. The study was undertaken in five randomly selected communal districts using a multi – stage area probability sampling method. Household sample size was calculated using a statistical methodology through a fixed formula based on a rural population size of 4410000, at a confidence level of 95 percent. A total of 500 households were selected with a sample size of 20 households in 5 communities within five different communal districts within the province. Half of the total sample size was used to represent the number of non-milk producing households (250) to get a true reflection on consumption profiles for nonproducers. Across the province the average communal family size was between 5-10 members with a monthly income of ZAR1340 per household. On average, pasture land size of the sampled households was 1 ha, with a range of 0.25-1.7 ha. The numbers of animals per species found in the studied province was highest for sheep (310) followed by cattle (227) and goat (87). Average livestock holding per household in the study area was 9.85 TLU (Tropical Livestock Unit). According to the respondents the predominant milking livestock numbers were between 1-3 animals milking per household. In the studied area traditional hand milking of livestock was the major milking practices at 12 percent in goats, 15 percent in sheep and 45 percent in cattle milk production. Consumption was the predominant reason for milk production recorded at 27 percent across the province. Milk production was 43 percent most preferred in cattle followed by 32 percent in goat and least at 29 percent in sheep across the province. In general, from the study it was noted that the majority (38 percent) of the respondents across the province indicated 0-5mins as the time it took to milk most milk producing livestock. The majority of the milking practices was done (37 percent) predominantly once a day, followed by 2 percent twice daily across the province. The daily milk production was on average (0.45±1.07) 2-5 litre in cattle, (4.86±0.814) 0-1litre in goats and (2.62±0.42) 0-1 litre sheep per producing house hold with in the province The monthly raw milk consumption in the province was (2.20± 1.42) 2-5 litres of cattle milk, (4.78±0.79) 2-5 litres of goat milk and (4.98±0.69) 2-5 litres of sheep milk per consuming household.
- Full Text:
- Date Issued: 2016
- Authors: Kumbirai, Kaguru Tinashe
- Date: 2016
- Subjects: Milk consumption -- South Africa -- Eastern Cape Dairy farming -- Economic aspects -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/3066 , vital:28251
- Description: The study was conducted in Eastern Cape Province, South Africa with the objective of characterising milk production and consumption among the communal households. A pretested semi-structured questionnaire was used to collect data through a single visit survey between June 2014 and May 2015. The study was undertaken in five randomly selected communal districts using a multi – stage area probability sampling method. Household sample size was calculated using a statistical methodology through a fixed formula based on a rural population size of 4410000, at a confidence level of 95 percent. A total of 500 households were selected with a sample size of 20 households in 5 communities within five different communal districts within the province. Half of the total sample size was used to represent the number of non-milk producing households (250) to get a true reflection on consumption profiles for nonproducers. Across the province the average communal family size was between 5-10 members with a monthly income of ZAR1340 per household. On average, pasture land size of the sampled households was 1 ha, with a range of 0.25-1.7 ha. The numbers of animals per species found in the studied province was highest for sheep (310) followed by cattle (227) and goat (87). Average livestock holding per household in the study area was 9.85 TLU (Tropical Livestock Unit). According to the respondents the predominant milking livestock numbers were between 1-3 animals milking per household. In the studied area traditional hand milking of livestock was the major milking practices at 12 percent in goats, 15 percent in sheep and 45 percent in cattle milk production. Consumption was the predominant reason for milk production recorded at 27 percent across the province. Milk production was 43 percent most preferred in cattle followed by 32 percent in goat and least at 29 percent in sheep across the province. In general, from the study it was noted that the majority (38 percent) of the respondents across the province indicated 0-5mins as the time it took to milk most milk producing livestock. The majority of the milking practices was done (37 percent) predominantly once a day, followed by 2 percent twice daily across the province. The daily milk production was on average (0.45±1.07) 2-5 litre in cattle, (4.86±0.814) 0-1litre in goats and (2.62±0.42) 0-1 litre sheep per producing house hold with in the province The monthly raw milk consumption in the province was (2.20± 1.42) 2-5 litres of cattle milk, (4.78±0.79) 2-5 litres of goat milk and (4.98±0.69) 2-5 litres of sheep milk per consuming household.
- Full Text:
- Date Issued: 2016
Characterization and Analysis of NTP Amplifier Traffic
- Rudman, Lauren, Irwin, Barry V W
- Authors: Rudman, Lauren , Irwin, Barry V W
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429482 , vital:72616 , 10.23919/SAIEE.2016.8531542
- Description: Network Time Protocol based DDoS attacks saw a lot of popularity throughout 2014. This paper shows the characterization and analysis of two large datasets containing packets from NTP based DDoS attacks captured in South Africa. Using a series of Python based tools, the dataset is analysed according to specific parts of the packet headers. These include the source IP address and Time-to-Live (TTL) values. The analysis found the top source addresses and looked at the TTL values observed for each address. These TTL values can be used to calculate the probable operating system or DDoS attack tool used by an attacker. We found that each TTL value seen for an address can indicate the number of hosts attacking the address or indicate minor routing changes. The Time-to-Live values are then analysed as a whole to find the total number used throughout each attack. The most frequent TTL values are then found and show that the majority of them indicate the attackers are using an initial TTL of 255. This value can indicate the use of a certain DDoS tool that creates packets with that exact initial TTL. The TTL values are then put into groups that can show the number of IP addresses a group of hosts are targeting. The paper discusses our work with two brief case studies correlating observed data to real-world attacks, and the observable impact thereof.
- Full Text:
- Date Issued: 2016
- Authors: Rudman, Lauren , Irwin, Barry V W
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429482 , vital:72616 , 10.23919/SAIEE.2016.8531542
- Description: Network Time Protocol based DDoS attacks saw a lot of popularity throughout 2014. This paper shows the characterization and analysis of two large datasets containing packets from NTP based DDoS attacks captured in South Africa. Using a series of Python based tools, the dataset is analysed according to specific parts of the packet headers. These include the source IP address and Time-to-Live (TTL) values. The analysis found the top source addresses and looked at the TTL values observed for each address. These TTL values can be used to calculate the probable operating system or DDoS attack tool used by an attacker. We found that each TTL value seen for an address can indicate the number of hosts attacking the address or indicate minor routing changes. The Time-to-Live values are then analysed as a whole to find the total number used throughout each attack. The most frequent TTL values are then found and show that the majority of them indicate the attackers are using an initial TTL of 255. This value can indicate the use of a certain DDoS tool that creates packets with that exact initial TTL. The TTL values are then put into groups that can show the number of IP addresses a group of hosts are targeting. The paper discusses our work with two brief case studies correlating observed data to real-world attacks, and the observable impact thereof.
- Full Text:
- Date Issued: 2016
Characterization and Electrocatalytic Activity of Nanocomposites Consisting of Nanosized Cobalt Tetraaminophenoxy Phthalocyanine, Multi‐walled Carbon Nanotubes and Gold Nanoparticles
- Shumba, Munyaradzi, Nyokong, Tebello
- Authors: Shumba, Munyaradzi , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/188659 , vital:44773 , xlink:href="https://doi.org/10.1002/elan.201501058"
- Description: Glassy carbon electrodes were modified with composites containing cobalt tetraaminophenoxy phthalocyanine nanoparticles (CoTAPhPcNP), multi-walled carbon nanotubes (MWCNT) and gold nanorods (AuNRs). The modified electrodes were studied for their electrocatalytic behavior towards the reduction of hydrogen peroxide. Phthalocyanine nanoparticles significantly improved electron transfer kinetics as compared to phthalocyanines which are not in the nanoparticle form when alone or in the presence of multiwalled carbon nanotubes (MWCNTs). CoTAPhPcNP-MWCNT-GCE proved to be suitable for hydrogen peroxide detection with a catalytic rate constant of 3.45×103 M−1 s−1 and a detection limit of 1.61×10−7 M. Adsorption Gibbs free energy ΔGo was found to be −19.22 kJ mol−1 for CoTAPhPcNP-MWCNT-GCE.
- Full Text:
- Date Issued: 2016
- Authors: Shumba, Munyaradzi , Nyokong, Tebello
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/188659 , vital:44773 , xlink:href="https://doi.org/10.1002/elan.201501058"
- Description: Glassy carbon electrodes were modified with composites containing cobalt tetraaminophenoxy phthalocyanine nanoparticles (CoTAPhPcNP), multi-walled carbon nanotubes (MWCNT) and gold nanorods (AuNRs). The modified electrodes were studied for their electrocatalytic behavior towards the reduction of hydrogen peroxide. Phthalocyanine nanoparticles significantly improved electron transfer kinetics as compared to phthalocyanines which are not in the nanoparticle form when alone or in the presence of multiwalled carbon nanotubes (MWCNTs). CoTAPhPcNP-MWCNT-GCE proved to be suitable for hydrogen peroxide detection with a catalytic rate constant of 3.45×103 M−1 s−1 and a detection limit of 1.61×10−7 M. Adsorption Gibbs free energy ΔGo was found to be −19.22 kJ mol−1 for CoTAPhPcNP-MWCNT-GCE.
- Full Text:
- Date Issued: 2016
Characterization of various garden grass species for energy conversion in a down draft biomass gasifier
- Authors: Mkosi, Lungisa
- Date: 2016
- Subjects: Biomass energy Greenhouse gases Renewable energy sources
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/5817 , vital:29399
- Description: Energy plays a vital role in socio-economic development and raising living standards of human beings. The overreliance on fossil fuels results in the depletion of fossil fuels as well as environmental pollution from the green-house gases that result from the use of fossil fuels. Biomass feedstock are able to ameliorate this situation by utilizing the CO2 that has been used by plants during photosynthesis. This study investigated the suitability of the three garden grass species (Chloris gayana, Cynodon dactylon and Pennisetum clandestum) as biomass feedstock for gasification purposes. The three garden grass species were collected at the Alice Campus of the University of Fort Hare. These grass species were characterized using elemental analyser (CHNS), FT-IR, EDX and TGA. The Activation energy (Ea) of the three grass species were 48.22 kJ/mol for P. clandestum, 36.8 kJ/mol for C. gayana and 258 kJ/mol for C. dactylon. Of the three grass species, C. gayana had the lowest Activation energy of 36.8 kJ/mol and also had the highest maximum efficiency of 69 percent compared to 65.3 percent for P. clandestum and 63.5 percent for C. dactylon. Actual gasification was not carried out but the results on maximum efficiency were obtained from computer simulation of gasification.
- Full Text:
- Date Issued: 2016
- Authors: Mkosi, Lungisa
- Date: 2016
- Subjects: Biomass energy Greenhouse gases Renewable energy sources
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/5817 , vital:29399
- Description: Energy plays a vital role in socio-economic development and raising living standards of human beings. The overreliance on fossil fuels results in the depletion of fossil fuels as well as environmental pollution from the green-house gases that result from the use of fossil fuels. Biomass feedstock are able to ameliorate this situation by utilizing the CO2 that has been used by plants during photosynthesis. This study investigated the suitability of the three garden grass species (Chloris gayana, Cynodon dactylon and Pennisetum clandestum) as biomass feedstock for gasification purposes. The three garden grass species were collected at the Alice Campus of the University of Fort Hare. These grass species were characterized using elemental analyser (CHNS), FT-IR, EDX and TGA. The Activation energy (Ea) of the three grass species were 48.22 kJ/mol for P. clandestum, 36.8 kJ/mol for C. gayana and 258 kJ/mol for C. dactylon. Of the three grass species, C. gayana had the lowest Activation energy of 36.8 kJ/mol and also had the highest maximum efficiency of 69 percent compared to 65.3 percent for P. clandestum and 63.5 percent for C. dactylon. Actual gasification was not carried out but the results on maximum efficiency were obtained from computer simulation of gasification.
- Full Text:
- Date Issued: 2016
Church Members Singing And Dancing
- Authors: Cburch Members
- Date: 2016
- Subjects: Keiskammahoek (South Africa)
- Type: Image
- Identifier: http://hdl.handle.net/10962/219848 , vital:48563 , KHP-194
- Description: Photograph of United Israel Church In Zion SA Church. Church Members Singing And Dancing In House. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/)
- Full Text: false
- Date Issued: 2016
- Authors: Cburch Members
- Date: 2016
- Subjects: Keiskammahoek (South Africa)
- Type: Image
- Identifier: http://hdl.handle.net/10962/219848 , vital:48563 , KHP-194
- Description: Photograph of United Israel Church In Zion SA Church. Church Members Singing And Dancing In House. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/)
- Full Text: false
- Date Issued: 2016
Church Members Singing And Dancing With Dr McConnachie
- Church Members, McConnachie, Boudina
- Authors: Church Members , McConnachie, Boudina
- Date: 2016
- Subjects: Keiskammahoek (South Africa)
- Type: Image
- Identifier: http://hdl.handle.net/10962/219859 , vital:48564 , KHP-195
- Description: Photograph of a group of Church members of the United Israel Church In Zion SA dancing and singing in house. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/)
- Full Text: false
- Date Issued: 2016
- Authors: Church Members , McConnachie, Boudina
- Date: 2016
- Subjects: Keiskammahoek (South Africa)
- Type: Image
- Identifier: http://hdl.handle.net/10962/219859 , vital:48564 , KHP-195
- Description: Photograph of a group of Church members of the United Israel Church In Zion SA dancing and singing in house. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/)
- Full Text: false
- Date Issued: 2016