An investigation of teachers' mathematical task selection in the Zambia context
- Authors: Kangwa, Evaristo
- Date: 2013
- Subjects: Mathematics -- Study and teaching
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1384 , http://hdl.handle.net/10962/d1001512
- Description: This research sought to investigate the sources and type of tasks used in the teaching of trigonometry in Zambia’s secondary schools, and to investigate the criteria used and decisions made by teachers in their selection and implementation of tasks. The study was conducted in three different school types located in high cost, medium cost and low cost respectively. One participant was chosen from each of the different categories of schools. The research was located within an interpretive paradigm. Data were collected through semi-structured interviews, lesson observations and document analysis which include: lesson plans for five consecutive days, pupils’ activity books and three textbooks predominantly used by the teachers. Document analysis was informed by the task analysis guide and essential themes which were used to tease out teachers’ task practice with regard to criteria used and decisions made in the selection and implementation of tasks. Essential themes that were qualitatively established were validated and explicated by the qualitative analysis. The findings of the study indicate that teachers picked tasks from prescribed textbooks. The study further suggests that teachers selected a mix of low and high level tasks, procedures without connections and procedures with connections tasks to be specific. There were no memorisations and doing mathematics tasks. Their choice of tasks was based on the purpose for which the task was intended. Some tasks were selected for the purpose of practicing the procedures and skills, other tasks for the promotion conceptual development. Most of high level tasks decline to low level tasks during implementation. The findings also indicate that teachers selected and implemented a variety of tasks and concepts. Furthermore, teachers presented tasks in various forms of representations and in a variety of ways. However, the results of this study could not be generalized because of the small sample involved. The results presented reflect the views and task practices of the target group. A possibility for future study would be to consider a large population, drawn across the country.
- Full Text:
- Date Issued: 2013
- Authors: Kangwa, Evaristo
- Date: 2013
- Subjects: Mathematics -- Study and teaching
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1384 , http://hdl.handle.net/10962/d1001512
- Description: This research sought to investigate the sources and type of tasks used in the teaching of trigonometry in Zambia’s secondary schools, and to investigate the criteria used and decisions made by teachers in their selection and implementation of tasks. The study was conducted in three different school types located in high cost, medium cost and low cost respectively. One participant was chosen from each of the different categories of schools. The research was located within an interpretive paradigm. Data were collected through semi-structured interviews, lesson observations and document analysis which include: lesson plans for five consecutive days, pupils’ activity books and three textbooks predominantly used by the teachers. Document analysis was informed by the task analysis guide and essential themes which were used to tease out teachers’ task practice with regard to criteria used and decisions made in the selection and implementation of tasks. Essential themes that were qualitatively established were validated and explicated by the qualitative analysis. The findings of the study indicate that teachers picked tasks from prescribed textbooks. The study further suggests that teachers selected a mix of low and high level tasks, procedures without connections and procedures with connections tasks to be specific. There were no memorisations and doing mathematics tasks. Their choice of tasks was based on the purpose for which the task was intended. Some tasks were selected for the purpose of practicing the procedures and skills, other tasks for the promotion conceptual development. Most of high level tasks decline to low level tasks during implementation. The findings also indicate that teachers selected and implemented a variety of tasks and concepts. Furthermore, teachers presented tasks in various forms of representations and in a variety of ways. However, the results of this study could not be generalized because of the small sample involved. The results presented reflect the views and task practices of the target group. A possibility for future study would be to consider a large population, drawn across the country.
- Full Text:
- Date Issued: 2013
An investigation of the criteria that create optimum tenant mix synergy in shopping centres
- Authors: De Villiers, Garth Elroy
- Date: 2013
- Subjects: Retail trade , Shopping centers , Marketing
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8756 , http://hdl.handle.net/10948/d1011658 , Retail trade , Shopping centers , Marketing
- Description: The shopping centre has evolved into an integral part of modern day society. New generations especially are unable to imagine a world without shopping centres. In 2008 a world wide economic down turn emphasized the competition to attract a buying market to shopping centres, some centres thrived and some centres struggled. The need to understand what creates these different responses to highly competitive scenarios is discussed in this study, with particular attention given to the tenant mix that exists in different shopping centres. Criteria that determine an optimum tenant mix are examined and the constraining factors are discussed. A literature review of shopping centres is discussed and the evolution of the shopping centre to our current day understanding of the term shopping centre is examined. Accepted definitions and categorisations of shopping centres along with a brief history of the shopping centre, as revealed by the literature, is presented. To create a tenant mix the body of tenants needs to be divided into sub- categories and various ways to achieve this are examined. The objectives of this study are to determine what strategic approaches to managing the tenant mix exists in the literature and what factors determine the formulation of this mix. Furthermore the study examines to what extent these or other strategic approaches are used in practice and finally makes recommendations to promote the optimum tenant mix in shopping centres. A literature review was conducted to determine what the theory reveals about the shopping centre industry. This was followed by an empirical survey conducted in the Port Elizabeth area of the Nelson Mandela Metropole. Finally the findings and theory were compared to make conclusions and suggest recommendation to achieve synergy in shopping centres through a optimum tenant mix.
- Full Text:
- Date Issued: 2013
- Authors: De Villiers, Garth Elroy
- Date: 2013
- Subjects: Retail trade , Shopping centers , Marketing
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8756 , http://hdl.handle.net/10948/d1011658 , Retail trade , Shopping centers , Marketing
- Description: The shopping centre has evolved into an integral part of modern day society. New generations especially are unable to imagine a world without shopping centres. In 2008 a world wide economic down turn emphasized the competition to attract a buying market to shopping centres, some centres thrived and some centres struggled. The need to understand what creates these different responses to highly competitive scenarios is discussed in this study, with particular attention given to the tenant mix that exists in different shopping centres. Criteria that determine an optimum tenant mix are examined and the constraining factors are discussed. A literature review of shopping centres is discussed and the evolution of the shopping centre to our current day understanding of the term shopping centre is examined. Accepted definitions and categorisations of shopping centres along with a brief history of the shopping centre, as revealed by the literature, is presented. To create a tenant mix the body of tenants needs to be divided into sub- categories and various ways to achieve this are examined. The objectives of this study are to determine what strategic approaches to managing the tenant mix exists in the literature and what factors determine the formulation of this mix. Furthermore the study examines to what extent these or other strategic approaches are used in practice and finally makes recommendations to promote the optimum tenant mix in shopping centres. A literature review was conducted to determine what the theory reveals about the shopping centre industry. This was followed by an empirical survey conducted in the Port Elizabeth area of the Nelson Mandela Metropole. Finally the findings and theory were compared to make conclusions and suggest recommendation to achieve synergy in shopping centres through a optimum tenant mix.
- Full Text:
- Date Issued: 2013
An investigation of the discursive construction of the Tanganyika-Zanzibar Union as nation in the Union Day coverage in The Citizen and Daily News newspapers from 2005 to 2011
- Authors: Dotto, Paul Casmir Kuhenga
- Date: 2013
- Subjects: Newspapers -- Research -- Tanzania , Press and politics -- Tanzania , Tanzania -- Politics and government -- 1964- , Zanzibar -- Politics and government -- 1964- , Press , Daily News , The Citizen , Union Day , Nation building
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:3412 , http://hdl.handle.net/10962/d1001843
- Description: This study is concerned with the constructions of the Tanzanian nation in the press. It has confined its focus, first, to the coverage from 2005 to 2011 on Union Day that marks the Union between Tanganyika and Zanzibar and the formation of the United Republic of Tanzania and, second, to two prominent Tanzanian newspapers, namely the state-owned Daily News, and the privately-owned The Citizen on Union Day. As the Union remains a contentious issue, the relevance of this research relates to the press’s considerable power to shape understandings and influence attitudes. The study works within a broad cultural and media studies framework and is informed by a constructionist approach to representation and to culture, and to nation in particular. It also draws of journalistic theories of agenda-setting and the normative roles of the press to probe the agendas set by the press on Union Day and to interrogate how the two newspapers construct and frame the Union of Tanganyika and Zanzibar as nation. The research responds to the question: ‘How has the Tanganyika-Zanzibar Union been represented in The Citizen and Daily News newspapers from 2005 to 2011?’ It employs quantitative and qualitative (thematic) content analysis to investigate the coverage in the editorials and feature articles of The Citizen and Daily News newspapers on Union Day (26 April) of 2005 to 2011. This study finds that the government-owned newspaper, Daily News, publishes more articles related to Union on Union Day than the privately-owned, The Citizen and collaborates more determinedly with the state in the process of constructing the nation. However, both newspapers adopt a collaborative role consistent with the development journalism tradition that endorses an informal partnership between media and the state in the process of development (Christians et al, 2009:201). Both publications tend to emphasise the hegemonic ideology pertaining to Union while giving limited attention to challenges to such constructions. While both newspapers do identify certain problems of the Union and thus exercise a monitorial role to varying extents, it is apparent that the press in Tanzania tends to be largely acritical, perhaps attributable to a long period under single party rule
- Full Text:
- Date Issued: 2013
- Authors: Dotto, Paul Casmir Kuhenga
- Date: 2013
- Subjects: Newspapers -- Research -- Tanzania , Press and politics -- Tanzania , Tanzania -- Politics and government -- 1964- , Zanzibar -- Politics and government -- 1964- , Press , Daily News , The Citizen , Union Day , Nation building
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:3412 , http://hdl.handle.net/10962/d1001843
- Description: This study is concerned with the constructions of the Tanzanian nation in the press. It has confined its focus, first, to the coverage from 2005 to 2011 on Union Day that marks the Union between Tanganyika and Zanzibar and the formation of the United Republic of Tanzania and, second, to two prominent Tanzanian newspapers, namely the state-owned Daily News, and the privately-owned The Citizen on Union Day. As the Union remains a contentious issue, the relevance of this research relates to the press’s considerable power to shape understandings and influence attitudes. The study works within a broad cultural and media studies framework and is informed by a constructionist approach to representation and to culture, and to nation in particular. It also draws of journalistic theories of agenda-setting and the normative roles of the press to probe the agendas set by the press on Union Day and to interrogate how the two newspapers construct and frame the Union of Tanganyika and Zanzibar as nation. The research responds to the question: ‘How has the Tanganyika-Zanzibar Union been represented in The Citizen and Daily News newspapers from 2005 to 2011?’ It employs quantitative and qualitative (thematic) content analysis to investigate the coverage in the editorials and feature articles of The Citizen and Daily News newspapers on Union Day (26 April) of 2005 to 2011. This study finds that the government-owned newspaper, Daily News, publishes more articles related to Union on Union Day than the privately-owned, The Citizen and collaborates more determinedly with the state in the process of constructing the nation. However, both newspapers adopt a collaborative role consistent with the development journalism tradition that endorses an informal partnership between media and the state in the process of development (Christians et al, 2009:201). Both publications tend to emphasise the hegemonic ideology pertaining to Union while giving limited attention to challenges to such constructions. While both newspapers do identify certain problems of the Union and thus exercise a monitorial role to varying extents, it is apparent that the press in Tanzania tends to be largely acritical, perhaps attributable to a long period under single party rule
- Full Text:
- Date Issued: 2013
An investigation on how grade 8 learners make sens of static electricity through exploring their cultural beliefs and experiences about lightning: a case study
- Nanghonga, Ottilie Mwanyenenange
- Authors: Nanghonga, Ottilie Mwanyenenange
- Date: 2013
- Subjects: Science -- Study and teaching (Secondary) -- Namibia Electrostatics -- Study and teaching (Secondary) -- Namibia Lightning -- Study and teaching (Secondary) -- Namibia , Static electricity , Cultural beliefs , Science -- Study and teaching (Secondary) -- Namibia , Electrostatics -- Study and teaching (Secondary) -- Namibia , Lightning -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1387 , http://hdl.handle.net/10962/d1001537
- Description: Lightning as a natural phenomenon is shallowly presented in the Namibian curriculum documents such as the syllabus and textbooks. This gap in curriculum triggered my interest to investigate whether learners’ meaning-making in static electricity was enabled or constrained by elicitation and integration of their cultural beliefs and experiences about lightning and by their practical activities. This study was conducted with my grade 8 learners at the school where I am currently teaching. The school is located in a rural area in Ohangwena region in Northern Namibia. The study is situated within an interpretive paradigm. Within the interpretive paradigm, a qualitative case study approach was adopted. I considered this methodological orientation appropriate in this study as it allowed me to use the following data gathering methods: document analysis, brainstorming, discussions and presentations, semi-structured interview, focus group interview, observation and an assessment test. Multiple methods to gather data were used for triangulation and validation purposes. For data analysis purposes, the data sets were colour-coded to derive themes and analytical statements. Ethical considerations were also taken seriously in this study and all participants gave consent. An analysis of data revealed that there is no learning objective or basic competence in the Namibian Physical Science syllabus for grade 8-10 that requires learners to bring in their cultural beliefs and experiences, in particular, about lightning. Yet the study revealed that learners possess a lot of prior everyday scientific and non-scientific knowledge and experiences about lightning that they had acquired from their communities. Also, mobilization of learners' everyday knowledge and experiences about lightning enabled learner engagement during the science lessons. Likewise, engaging learners in practical activities in static electricity helped them to make meaning of scientific concepts. Based on my research findings, I therefore, recommend that learners' prior everyday knowledge and experiences about lightning should be incorporated during teaching and learning of the topic on static electricity.
- Full Text:
- Date Issued: 2013
- Authors: Nanghonga, Ottilie Mwanyenenange
- Date: 2013
- Subjects: Science -- Study and teaching (Secondary) -- Namibia Electrostatics -- Study and teaching (Secondary) -- Namibia Lightning -- Study and teaching (Secondary) -- Namibia , Static electricity , Cultural beliefs , Science -- Study and teaching (Secondary) -- Namibia , Electrostatics -- Study and teaching (Secondary) -- Namibia , Lightning -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1387 , http://hdl.handle.net/10962/d1001537
- Description: Lightning as a natural phenomenon is shallowly presented in the Namibian curriculum documents such as the syllabus and textbooks. This gap in curriculum triggered my interest to investigate whether learners’ meaning-making in static electricity was enabled or constrained by elicitation and integration of their cultural beliefs and experiences about lightning and by their practical activities. This study was conducted with my grade 8 learners at the school where I am currently teaching. The school is located in a rural area in Ohangwena region in Northern Namibia. The study is situated within an interpretive paradigm. Within the interpretive paradigm, a qualitative case study approach was adopted. I considered this methodological orientation appropriate in this study as it allowed me to use the following data gathering methods: document analysis, brainstorming, discussions and presentations, semi-structured interview, focus group interview, observation and an assessment test. Multiple methods to gather data were used for triangulation and validation purposes. For data analysis purposes, the data sets were colour-coded to derive themes and analytical statements. Ethical considerations were also taken seriously in this study and all participants gave consent. An analysis of data revealed that there is no learning objective or basic competence in the Namibian Physical Science syllabus for grade 8-10 that requires learners to bring in their cultural beliefs and experiences, in particular, about lightning. Yet the study revealed that learners possess a lot of prior everyday scientific and non-scientific knowledge and experiences about lightning that they had acquired from their communities. Also, mobilization of learners' everyday knowledge and experiences about lightning enabled learner engagement during the science lessons. Likewise, engaging learners in practical activities in static electricity helped them to make meaning of scientific concepts. Based on my research findings, I therefore, recommend that learners' prior everyday knowledge and experiences about lightning should be incorporated during teaching and learning of the topic on static electricity.
- Full Text:
- Date Issued: 2013
An investigation on how learners may use multiple representations in a social interaction to promote learning of percentages and fractions: a case study
- Authors: Ngola-Kazumba, Maria
- Date: 2013
- Subjects: Fractions -- Study and teaching (Secondary) -- Namibia -- Case studies Percentage -- Study and teaching (Secondary) -- Namibia -- Case studies Mathematical notation -- Study and teaching (Secondary) -- Namibia Mathematics -- Study and teaching (Secondary) -- Namibia Experiential learning -- Namibia Education, Secondary -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1890 , http://hdl.handle.net/10962/d1006057
- Description: The study examined the use of multiple representations such as the real world, written symbols, spoken symbols, diagrams and manipulatives by learners to promote the learning of percentages and fractions through social interaction. This investigation was carried out through a teaching and learning programme which was developed and implemented by me, the researcher. The effect of the implemented programme was the main focus of the research. The qualitative study was oriented in the interpretive paradigm – a paradigm that seeks to understand the meaning attached to human actions. Twenty learners participated in the implementation of the programme and 9 learners were selected for focus group interviews. The purpose of the interviews was to explore learners' understanding and feelings about the use of multiple representations in the learning of percentages and fractions through social interactions. The other tools employed in this study were pre-and-post diagnostic tests, observations, learners' work and a journal. The pre-test was used to determine learners' prior knowledge for the program design and implementation, while the post-test and learners' work were used to analyze the effect of the programme. Observations were used to investigate how multiple representations promoted or did not promote the learning of percentages and fractions. The teacher's journal was to record and reflect on any relevant information gathered on each lesson observed. The data shows that the effective use of multiple representations helped learners learn the concept of percentages and fractions better. Learners were able to look at representations in useful ways; multiple representations made some aspects of the concept clear; and multiple representations enabled learners to correct errors. Through the interaction between the teacher and learners, the following was found: all the learners changed words to change focus; learners made links between multiple representations; the learners deepened their concepts of percentages and fractions; learners could convert between fractions using multiple representations; learners could work out percentages of a quantity; and learners could express one quantity as a percentage of another. Furthermore, through the interaction between learners and learners all learners could identify more equivalent fractions of an initial fraction which was given to them; and they could increase and decrease a quantity by a given percentage. On the basis of this research, it can be concluded that the programme promoted the learning of percentages and fractions through three effective methodologies. The first methodology consisted of the effective use of multiple representations; the second methodology concerned the interaction between the teacher and learner during the learning process and the last methodology related to the interaction between the learners - interactions that were not strongly mediated by the teacher. I would recommend that teachers use these three effective approaches when teaching percentages and fractions to promote the learning of the concepts.
- Full Text:
- Date Issued: 2013
- Authors: Ngola-Kazumba, Maria
- Date: 2013
- Subjects: Fractions -- Study and teaching (Secondary) -- Namibia -- Case studies Percentage -- Study and teaching (Secondary) -- Namibia -- Case studies Mathematical notation -- Study and teaching (Secondary) -- Namibia Mathematics -- Study and teaching (Secondary) -- Namibia Experiential learning -- Namibia Education, Secondary -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1890 , http://hdl.handle.net/10962/d1006057
- Description: The study examined the use of multiple representations such as the real world, written symbols, spoken symbols, diagrams and manipulatives by learners to promote the learning of percentages and fractions through social interaction. This investigation was carried out through a teaching and learning programme which was developed and implemented by me, the researcher. The effect of the implemented programme was the main focus of the research. The qualitative study was oriented in the interpretive paradigm – a paradigm that seeks to understand the meaning attached to human actions. Twenty learners participated in the implementation of the programme and 9 learners were selected for focus group interviews. The purpose of the interviews was to explore learners' understanding and feelings about the use of multiple representations in the learning of percentages and fractions through social interactions. The other tools employed in this study were pre-and-post diagnostic tests, observations, learners' work and a journal. The pre-test was used to determine learners' prior knowledge for the program design and implementation, while the post-test and learners' work were used to analyze the effect of the programme. Observations were used to investigate how multiple representations promoted or did not promote the learning of percentages and fractions. The teacher's journal was to record and reflect on any relevant information gathered on each lesson observed. The data shows that the effective use of multiple representations helped learners learn the concept of percentages and fractions better. Learners were able to look at representations in useful ways; multiple representations made some aspects of the concept clear; and multiple representations enabled learners to correct errors. Through the interaction between the teacher and learners, the following was found: all the learners changed words to change focus; learners made links between multiple representations; the learners deepened their concepts of percentages and fractions; learners could convert between fractions using multiple representations; learners could work out percentages of a quantity; and learners could express one quantity as a percentage of another. Furthermore, through the interaction between learners and learners all learners could identify more equivalent fractions of an initial fraction which was given to them; and they could increase and decrease a quantity by a given percentage. On the basis of this research, it can be concluded that the programme promoted the learning of percentages and fractions through three effective methodologies. The first methodology consisted of the effective use of multiple representations; the second methodology concerned the interaction between the teacher and learner during the learning process and the last methodology related to the interaction between the learners - interactions that were not strongly mediated by the teacher. I would recommend that teachers use these three effective approaches when teaching percentages and fractions to promote the learning of the concepts.
- Full Text:
- Date Issued: 2013
An investigation on the stakeholders' perceptions of the involvement of the governing bodies in the appointment of teachers in the Libode District of the Eastern Cape Province
- Authors: Mabunu, Sipho Christian
- Date: 2013
- Subjects: Teachers -- Recruiting -- School governing body -- Eastern Cape -- South Africa
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:18457 , http://hdl.handle.net/11260/d1008042
- Description: Decentralization of governance is one of the many reforms that has been undertaken by the Department of Education in the Republic of South Africa since the attainment of democracy in 1994. The concept of decentralisation originates from the belief that the state alone cannot control schools, but should share its power with other stakeholders, particularly those closer to the school, on a partnership basis (Marishane, 1999:78). The South African Schools Act (SASA) No 84 of 1996 mandates the establishment of democratic structures of school governance in all schools (RSA, 1996a, section 16). According to the South African Schools Act No 84 of 1996, School Governing Bodies have been mandated to be responsible for the recommendation of teachers for appointment through interviews. This study was conducted in the Libode District in the Eastern Cape. Libode is composed of rural villages which are characterised by poverty, a high rate of unemployment and illiteracy. Many schools in the Libode district of education are experiencing problems emanating from the recruitment of teachers carried out by the SGBs. Interviews conducted by the SGBs are more often than not nullified and the selection and interview processes have to be repeated. They (SGBs) fail to defend their recommendations with valid facts when challenged by union representatives or by candidates themselves. The major concern of this study is to investigate the stakeholders' perceptions of the involvement of school governing bodies in the appointment of teachers in Libode district. A qualitative approach was employed for this research study. Purposive sampling was used for sampling the schools from which interviewees were selected. There were 14 respondents in the sample. Three (3) school principals , three teachers, three (3) teacher candidates, one SADTU teacher, one NAPTOSA teacher, two (2) SGB parents from the parent component and two (2) circuit managers were interviewed. The case study research design was employed to explore the perceptions of the stakeholders regarding teacher appointments. This research employed three data collection techniques, namely semi-structured interviews, documents analysis and observations. The main findings of this study reveal that the involvement, or participation, of the SGBs (parent components) in the recruitment of teachers is the source of conflict and disputes. The SGBs lack capacity, capacity to draft criteria for shortlisting qualified teachers, and capacity to conduct interviews properly and fairly. Findings suggest that problems still exist around SGBs' knowledge of Policies and Acts that enshrine procedures pertaining to teacher recruitment. In conclusion, from the findings, it appears premature for the system to mandate this professional function of teacher recruitment to the office of the SGBs.
- Full Text:
- Date Issued: 2013
- Authors: Mabunu, Sipho Christian
- Date: 2013
- Subjects: Teachers -- Recruiting -- School governing body -- Eastern Cape -- South Africa
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:18457 , http://hdl.handle.net/11260/d1008042
- Description: Decentralization of governance is one of the many reforms that has been undertaken by the Department of Education in the Republic of South Africa since the attainment of democracy in 1994. The concept of decentralisation originates from the belief that the state alone cannot control schools, but should share its power with other stakeholders, particularly those closer to the school, on a partnership basis (Marishane, 1999:78). The South African Schools Act (SASA) No 84 of 1996 mandates the establishment of democratic structures of school governance in all schools (RSA, 1996a, section 16). According to the South African Schools Act No 84 of 1996, School Governing Bodies have been mandated to be responsible for the recommendation of teachers for appointment through interviews. This study was conducted in the Libode District in the Eastern Cape. Libode is composed of rural villages which are characterised by poverty, a high rate of unemployment and illiteracy. Many schools in the Libode district of education are experiencing problems emanating from the recruitment of teachers carried out by the SGBs. Interviews conducted by the SGBs are more often than not nullified and the selection and interview processes have to be repeated. They (SGBs) fail to defend their recommendations with valid facts when challenged by union representatives or by candidates themselves. The major concern of this study is to investigate the stakeholders' perceptions of the involvement of school governing bodies in the appointment of teachers in Libode district. A qualitative approach was employed for this research study. Purposive sampling was used for sampling the schools from which interviewees were selected. There were 14 respondents in the sample. Three (3) school principals , three teachers, three (3) teacher candidates, one SADTU teacher, one NAPTOSA teacher, two (2) SGB parents from the parent component and two (2) circuit managers were interviewed. The case study research design was employed to explore the perceptions of the stakeholders regarding teacher appointments. This research employed three data collection techniques, namely semi-structured interviews, documents analysis and observations. The main findings of this study reveal that the involvement, or participation, of the SGBs (parent components) in the recruitment of teachers is the source of conflict and disputes. The SGBs lack capacity, capacity to draft criteria for shortlisting qualified teachers, and capacity to conduct interviews properly and fairly. Findings suggest that problems still exist around SGBs' knowledge of Policies and Acts that enshrine procedures pertaining to teacher recruitment. In conclusion, from the findings, it appears premature for the system to mandate this professional function of teacher recruitment to the office of the SGBs.
- Full Text:
- Date Issued: 2013
An operational model for increasing customer satisfaction for Detpak South Africa
- Authors: Van Deventer, Reinard Gawie
- Date: 2013
- Subjects: Consumer satisfaction -- South Africa , Paper industry -- Customer services -- South Africa , Customer relations -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8886 , http://hdl.handle.net/10948/d1020807
- Description: Detpak South Africa is a subsidiary paper and board company of Mpact Limited, formally known as Mondi Packaging South Africa. The Mpact group of companies operates across 31 sites and employs more than 3 700 employees. Detpak South Africa specializes in three respective niche markets: international fast food packaging, industrial packaging and disposables packaging. The primary objective of this study is to propose an operational model for improving customer satisfaction levels within the disposables market for Detpak South Africa. Further, Detpak’s competitive position with respect to customer satisfaction was assessed and an empirical assessment was conducted to identify imperative attributes impacting on overall customer satisfaction. It is noted from marketing journals that providing a quality product at the right price no longer suffices as an adequate value proposition. Numerous authors have noted that there is no longer a difference between a goods market and a service market, in its purest form, and that manufacturers of goods must embrace the principles of service marketing to develop a competitive advantage within the market. A quantitative research was conducted to obtain data. The measuring instrument used to obtain data was a self-administered questionnaire. A total of 84 questionnaires were distributed nationally across South Africa. From the 84 questionnaires a total of 62 questionnaires were obtained from respondents, from which a final sample of n=59 was considered for capturing. Three questionnaires were excluded from the sample due to response error of non-completion. Correlation coefficient analysis was used to calculate the relationships between independent and dependant variables. It was found that all customer satisfaction attributes, listed below, had a positive relationship to overall customer satisfaction: Customer value; Product quality; Price; Communication; Reliability; Responsiveness; Customer service; Sales support. The hypothesized relationship between overall customer satisfaction and customer loyalty was measured and confirmed to be strongly positive. It can be concluded that a positive movement in overall customer satisfaction will be accompanied by a similarly positive movement in customer loyalty. Furthermore, through secondary review it was noted that the retention of existing customers costs much less and is more profitable than the acquisition of new business. The results presented within this study indicate a strong market position for Detpak South Africa in terms of product quality compared against competitive activity, which means a competitive advantage in the market for the company and which will assist in attaining its strategic objectives. The results also identified a number of customer satisfaction attributes which Detpak South Africa could improve to allow them to establish a firm position in the market through the overall improvement of customer satisfaction levels. Finally, an operational model integrating the important concepts identified within the literature study was proposed to assist Detpak South Africa in enhancing levels of perceived customer satisfaction. The model integrates the important business philosophies of customer relations, best practices, continuous improvement and, finally, customer satisfaction attributes.
- Full Text:
- Date Issued: 2013
- Authors: Van Deventer, Reinard Gawie
- Date: 2013
- Subjects: Consumer satisfaction -- South Africa , Paper industry -- Customer services -- South Africa , Customer relations -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8886 , http://hdl.handle.net/10948/d1020807
- Description: Detpak South Africa is a subsidiary paper and board company of Mpact Limited, formally known as Mondi Packaging South Africa. The Mpact group of companies operates across 31 sites and employs more than 3 700 employees. Detpak South Africa specializes in three respective niche markets: international fast food packaging, industrial packaging and disposables packaging. The primary objective of this study is to propose an operational model for improving customer satisfaction levels within the disposables market for Detpak South Africa. Further, Detpak’s competitive position with respect to customer satisfaction was assessed and an empirical assessment was conducted to identify imperative attributes impacting on overall customer satisfaction. It is noted from marketing journals that providing a quality product at the right price no longer suffices as an adequate value proposition. Numerous authors have noted that there is no longer a difference between a goods market and a service market, in its purest form, and that manufacturers of goods must embrace the principles of service marketing to develop a competitive advantage within the market. A quantitative research was conducted to obtain data. The measuring instrument used to obtain data was a self-administered questionnaire. A total of 84 questionnaires were distributed nationally across South Africa. From the 84 questionnaires a total of 62 questionnaires were obtained from respondents, from which a final sample of n=59 was considered for capturing. Three questionnaires were excluded from the sample due to response error of non-completion. Correlation coefficient analysis was used to calculate the relationships between independent and dependant variables. It was found that all customer satisfaction attributes, listed below, had a positive relationship to overall customer satisfaction: Customer value; Product quality; Price; Communication; Reliability; Responsiveness; Customer service; Sales support. The hypothesized relationship between overall customer satisfaction and customer loyalty was measured and confirmed to be strongly positive. It can be concluded that a positive movement in overall customer satisfaction will be accompanied by a similarly positive movement in customer loyalty. Furthermore, through secondary review it was noted that the retention of existing customers costs much less and is more profitable than the acquisition of new business. The results presented within this study indicate a strong market position for Detpak South Africa in terms of product quality compared against competitive activity, which means a competitive advantage in the market for the company and which will assist in attaining its strategic objectives. The results also identified a number of customer satisfaction attributes which Detpak South Africa could improve to allow them to establish a firm position in the market through the overall improvement of customer satisfaction levels. Finally, an operational model integrating the important concepts identified within the literature study was proposed to assist Detpak South Africa in enhancing levels of perceived customer satisfaction. The model integrates the important business philosophies of customer relations, best practices, continuous improvement and, finally, customer satisfaction attributes.
- Full Text:
- Date Issued: 2013
An overview of normative frameworks for the protection of development-induced IDPs in Kenya.
- Authors: Juma, Laurence
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127112 , vital:35957 , https://doi.org/10.1163/17087384-12342016
- Description: Based on the assumption that development induced displacement brings new challenges that the existing protection frameworks may not be aptly suited to deal with, this article analyses how the existing laws have met this challenge and the prospects for further improvement. While its focus is on Kenya, it evaluates the normative quality of protection and standards offered by regional instruments against the existing, as well emerging, parameters for implementation at the domestic level. In this regard, the article examines the propriety of Kenya’s newly promulgated law on internal displacement in providing for protection for the development induced IDPs, the implementation programme that it establishes and its prospects for furthering the vision of the UN Guiding Principles on Internally Displaced and other regional instruments.
- Full Text:
- Date Issued: 2013
- Authors: Juma, Laurence
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127112 , vital:35957 , https://doi.org/10.1163/17087384-12342016
- Description: Based on the assumption that development induced displacement brings new challenges that the existing protection frameworks may not be aptly suited to deal with, this article analyses how the existing laws have met this challenge and the prospects for further improvement. While its focus is on Kenya, it evaluates the normative quality of protection and standards offered by regional instruments against the existing, as well emerging, parameters for implementation at the domestic level. In this regard, the article examines the propriety of Kenya’s newly promulgated law on internal displacement in providing for protection for the development induced IDPs, the implementation programme that it establishes and its prospects for furthering the vision of the UN Guiding Principles on Internally Displaced and other regional instruments.
- Full Text:
- Date Issued: 2013
An Unprecedented 'Precedent'?: Phodiclinics (Pty) Ltd v Pinehaven Private Hospital (Pty) Ltd (594/2010)[2011] ZASCA163 (28 September 2011); 2011 4 All SA 331 (SCA)
- Authors: Glover, Graham B
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69950 , vital:29598 , https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2364288
- Description: There are some fundamental underlying requirements that need to be in place for a system of precedent to operate. Of these I wish to isolate two that are germane to this note. The first is that court decisions (especially those in which a written judgment is handed down) need to be clearly reasoned and logically articulated to be understandable, effective and to have value in a system of precedent that finds its ultimate lodestar in the rule of law. There is no constitutional or statutory requirement that a court in all cases must furnish reasons, or even written reasons, for its decision But the practice of doing so, the Constitutional Court has said, supports the rule of law, ensuring that judicial decision-making does not occur in a manner that is arbitrary, and ensures that judges may be held accountable for their decisions. The second requirement is a technical rule – the rule of majority: if the case is heard by a full bench, and where differing opinions are handed down by the judges hearing the case, the ratio decidendi can only be identified from those judges whose reasoning is in the majority.
- Full Text: false
- Date Issued: 2013
- Authors: Glover, Graham B
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/69950 , vital:29598 , https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2364288
- Description: There are some fundamental underlying requirements that need to be in place for a system of precedent to operate. Of these I wish to isolate two that are germane to this note. The first is that court decisions (especially those in which a written judgment is handed down) need to be clearly reasoned and logically articulated to be understandable, effective and to have value in a system of precedent that finds its ultimate lodestar in the rule of law. There is no constitutional or statutory requirement that a court in all cases must furnish reasons, or even written reasons, for its decision But the practice of doing so, the Constitutional Court has said, supports the rule of law, ensuring that judicial decision-making does not occur in a manner that is arbitrary, and ensures that judges may be held accountable for their decisions. The second requirement is a technical rule – the rule of majority: if the case is heard by a full bench, and where differing opinions are handed down by the judges hearing the case, the ratio decidendi can only be identified from those judges whose reasoning is in the majority.
- Full Text: false
- Date Issued: 2013
Analysing learning at the interface of scientific and traditional ecological knowledge in a mangrove ecosystem restoration scenario in the eastern coast of Tanzania
- Sabai, Daniel, Sisitka, Heila
- Authors: Sabai, Daniel , Sisitka, Heila
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127179 , vital:35974 , https://doi.org/10.2478/trser-2013-0027
- Description: Records from community-based coastal management initiatives indicate that local communities who are key actors in activities that aim at safeguarding the health status of terrestrial and marine ecosystems face a lot of challenges associated with adapting andapplying indicators that are scientifically abstracted and methodologically too reified, given varying social, contextual and technical conditions prevailing amongst them. This paper brings into view possible challenges of adapting and applying scientific indicators in community-based monitoring of mangrove ecosystem and suggests a new approach that may lead to development of indicators which are less reified, more congruent to users (coastal communities) and likely to attract a wider social learning in the mangroverestoration context. It also sets a bridge for scientific institutions (including universities), tounderstand various social, cultural and contextual needs that determine epistemological access between them and local communities, which need to be addressed prior to engaging targetcommunities in participatory monitoring programmes.The paper attempts to analyse learning at the interface of knowledge that scientific institutions produce and the potential knowledge that exists in local context (traditional ecological knowledge) for purposes of widening and improving knowledge sharing and safeguarding the health status of mangrove species and fisheries that use them as key habitats. The paper stems from a study which employs processes of abstraction and experiential learning techniques such as Experiential Learning Intervention Workshop carried out in 2012,to unlock knowledge that local communities have, as an input for underlabouring existing scientific indicators in the eastern coast of Tanzania.It brings into view the need to consider contextual realities on ground, the level of education that the participating group has, the minimum level of participation that is required, structures that govern coastal monitoring practices at local level and the need for scientific institutions to consider the knowledge that local people have as an input for enhancing or improving coastal monitoring, especially monitoring of mangrove and fishery resources. The paper finally comes up with a framework of indicators which is regarded by coastal communities as being less reified, more contextually and culturally congruent and which can easily be used in detecting environmental trends, threats, changes and conditions of mangrove and fisheries resources, and attract wider social learning processes.
- Full Text:
- Date Issued: 2013
- Authors: Sabai, Daniel , Sisitka, Heila
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127179 , vital:35974 , https://doi.org/10.2478/trser-2013-0027
- Description: Records from community-based coastal management initiatives indicate that local communities who are key actors in activities that aim at safeguarding the health status of terrestrial and marine ecosystems face a lot of challenges associated with adapting andapplying indicators that are scientifically abstracted and methodologically too reified, given varying social, contextual and technical conditions prevailing amongst them. This paper brings into view possible challenges of adapting and applying scientific indicators in community-based monitoring of mangrove ecosystem and suggests a new approach that may lead to development of indicators which are less reified, more congruent to users (coastal communities) and likely to attract a wider social learning in the mangroverestoration context. It also sets a bridge for scientific institutions (including universities), tounderstand various social, cultural and contextual needs that determine epistemological access between them and local communities, which need to be addressed prior to engaging targetcommunities in participatory monitoring programmes.The paper attempts to analyse learning at the interface of knowledge that scientific institutions produce and the potential knowledge that exists in local context (traditional ecological knowledge) for purposes of widening and improving knowledge sharing and safeguarding the health status of mangrove species and fisheries that use them as key habitats. The paper stems from a study which employs processes of abstraction and experiential learning techniques such as Experiential Learning Intervention Workshop carried out in 2012,to unlock knowledge that local communities have, as an input for underlabouring existing scientific indicators in the eastern coast of Tanzania.It brings into view the need to consider contextual realities on ground, the level of education that the participating group has, the minimum level of participation that is required, structures that govern coastal monitoring practices at local level and the need for scientific institutions to consider the knowledge that local people have as an input for enhancing or improving coastal monitoring, especially monitoring of mangrove and fishery resources. The paper finally comes up with a framework of indicators which is regarded by coastal communities as being less reified, more contextually and culturally congruent and which can easily be used in detecting environmental trends, threats, changes and conditions of mangrove and fisheries resources, and attract wider social learning processes.
- Full Text:
- Date Issued: 2013
Analysis of factors influencing the performance of a hydrokinetic coil pump
- Authors: Opperman, Adriaan Jacobus
- Date: 2013
- Subjects: Pumping machinery, Electric , Pumping machinery -- Performance
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9640 , http://hdl.handle.net/10948/d1021041
- Description: A hydrokinetic coil pump (HCP) is described by its name. It is a coil pump driven by the kinetic energy in flowing water. The hydrokinetic energy is converted into mechanical energy by means of a paddle-wheel. The coil pump makes up part of the paddle-wheel and together is called a HCP. The HCP floats in a stream of flowing water while tethered to the bank. The focus of the study was to identify and analyse the factors influencing the HCP. The HCP was then optimized for rural application. Data acquisition took place through experimentation on a full scale experimental platform according to a central composite experimental design. Variables used for the experimentation included; Stream Velocity, Delivery Head, Number of Coils, Discharge, Number of Paddles, Paddle-Wheel rotational speed Overall HCP efficiencies of up to 22 percent were obtained. The efficiency would drop as the stream velocity increased. Stream velocity has been identified as the most influential factor with regards to the variables analysed by this study. The HCP is ideal for rural application. The simplicity of the design ensures reliability as well as an effective water supply solution. The HCP is ideal for slow flowing rivers and can deliver up to 1190ℓ/h to a delivery head of 5m with a stream velocity of 1.2m/s. This is sufficient to supply a small rural community with running water.
- Full Text:
- Date Issued: 2013
- Authors: Opperman, Adriaan Jacobus
- Date: 2013
- Subjects: Pumping machinery, Electric , Pumping machinery -- Performance
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9640 , http://hdl.handle.net/10948/d1021041
- Description: A hydrokinetic coil pump (HCP) is described by its name. It is a coil pump driven by the kinetic energy in flowing water. The hydrokinetic energy is converted into mechanical energy by means of a paddle-wheel. The coil pump makes up part of the paddle-wheel and together is called a HCP. The HCP floats in a stream of flowing water while tethered to the bank. The focus of the study was to identify and analyse the factors influencing the HCP. The HCP was then optimized for rural application. Data acquisition took place through experimentation on a full scale experimental platform according to a central composite experimental design. Variables used for the experimentation included; Stream Velocity, Delivery Head, Number of Coils, Discharge, Number of Paddles, Paddle-Wheel rotational speed Overall HCP efficiencies of up to 22 percent were obtained. The efficiency would drop as the stream velocity increased. Stream velocity has been identified as the most influential factor with regards to the variables analysed by this study. The HCP is ideal for rural application. The simplicity of the design ensures reliability as well as an effective water supply solution. The HCP is ideal for slow flowing rivers and can deliver up to 1190ℓ/h to a delivery head of 5m with a stream velocity of 1.2m/s. This is sufficient to supply a small rural community with running water.
- Full Text:
- Date Issued: 2013
Analysis of ICT governance initiatives as a mechanism to enhance corporate governance, with particular reference to Nelson Mandela Bay Municipality
- Authors: Tolom, Sindiswa
- Date: 2013
- Subjects: Corporate governance -- South Africa -- Nelson Mandela Bay Municipality , Information technology -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8904 , http://hdl.handle.net/10948/d1020999
- Description: Developing countries such as South Africa have a tremendous potential for rapid and sustainable economic and social development by leveraging the benefits and advantages of Information and Communication Technology (ICT) and applying it appropriately within the local government sector. As such, the Local Government Turnaround Strategy’s (LGTAS) vision states that: Each municipality must have the necessary ICT infrastructure and connectivity; and that ICT systems must be put in place across all municipalities to accelerate service delivery, and improve efficiency and accountability. However, technology on its own cannot achieve much; it must be supported by capable people and tested processes to provide services in which the public can have confidence. Disparities, both from within the municipal sector as well as in the larger South African ICT landscape, have influenced the manner in which municipalities make use of ICT. Nevertheless, it has been observed that despite the use of ICT, there has been a lack of utilising ICT governance to enhance corporate governance in the public sector, particularly in municipalities. In this study, an analysis was made of ICT governance initiatives, as a mechanism to enhance corporate governance, with particular reference to the Nelson Mandela Bay Municipality (NMBM) in the Eastern Cape. The research itself has identified risk levels that exist as a result of the lack of ICT governance and risk management. The respondents were given an opportunity to agree or disagree with statements regarding the state of ICT provision and support, corporate governance and other elements within the institution. The researcher has formulated recommendations to solve identified problem based in the research results in ICT governance and corporate governance. While governance developments have primarily been driven by the need for transparency regarding enterprise risks and the protection of shareholder value, the pervasive use of technology has created a critical dependency on ICT that calls for a specific focus on ICT governance. ICT governance is part of corporate governance,which is the responsibility of the organisation’s top executive, to ensure that its information technology supports the goals and objectives of the organisation, through a variety of structural mechanisms, processes and mechanisms for communication. Fundamentally, ICT governance is concerned with whether ICT is delivering value and the management of ICT risks, driven by a strategic alignment between business and ICT, resources management and performance management. The corporate governance of ICT involves evaluating and directing the plans for the use of ICT to support the Institution and monitoring these. It includes the strategy and policies for using ICT within the institution. The executive authority and executive management are accountable and responsible for ensuring that the governance of ICT is implemented in the institution in line with this framework.
- Full Text:
- Date Issued: 2013
- Authors: Tolom, Sindiswa
- Date: 2013
- Subjects: Corporate governance -- South Africa -- Nelson Mandela Bay Municipality , Information technology -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8904 , http://hdl.handle.net/10948/d1020999
- Description: Developing countries such as South Africa have a tremendous potential for rapid and sustainable economic and social development by leveraging the benefits and advantages of Information and Communication Technology (ICT) and applying it appropriately within the local government sector. As such, the Local Government Turnaround Strategy’s (LGTAS) vision states that: Each municipality must have the necessary ICT infrastructure and connectivity; and that ICT systems must be put in place across all municipalities to accelerate service delivery, and improve efficiency and accountability. However, technology on its own cannot achieve much; it must be supported by capable people and tested processes to provide services in which the public can have confidence. Disparities, both from within the municipal sector as well as in the larger South African ICT landscape, have influenced the manner in which municipalities make use of ICT. Nevertheless, it has been observed that despite the use of ICT, there has been a lack of utilising ICT governance to enhance corporate governance in the public sector, particularly in municipalities. In this study, an analysis was made of ICT governance initiatives, as a mechanism to enhance corporate governance, with particular reference to the Nelson Mandela Bay Municipality (NMBM) in the Eastern Cape. The research itself has identified risk levels that exist as a result of the lack of ICT governance and risk management. The respondents were given an opportunity to agree or disagree with statements regarding the state of ICT provision and support, corporate governance and other elements within the institution. The researcher has formulated recommendations to solve identified problem based in the research results in ICT governance and corporate governance. While governance developments have primarily been driven by the need for transparency regarding enterprise risks and the protection of shareholder value, the pervasive use of technology has created a critical dependency on ICT that calls for a specific focus on ICT governance. ICT governance is part of corporate governance,which is the responsibility of the organisation’s top executive, to ensure that its information technology supports the goals and objectives of the organisation, through a variety of structural mechanisms, processes and mechanisms for communication. Fundamentally, ICT governance is concerned with whether ICT is delivering value and the management of ICT risks, driven by a strategic alignment between business and ICT, resources management and performance management. The corporate governance of ICT involves evaluating and directing the plans for the use of ICT to support the Institution and monitoring these. It includes the strategy and policies for using ICT within the institution. The executive authority and executive management are accountable and responsible for ensuring that the governance of ICT is implemented in the institution in line with this framework.
- Full Text:
- Date Issued: 2013
Analysis of official development assistance (ODA) in the Eastern Cape Province
- Sotondoshe, Tolbert Hlanganisile
- Authors: Sotondoshe, Tolbert Hlanganisile
- Date: 2013
- Subjects: Economic assistance -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9202 , http://hdl.handle.net/10948/d1020422
- Description: In this study Official Development Assistance (ODA) is defined as resource flows from international community in the form of grants, technical assistance, support and financial co-operation. Government is held partially responsible or accountable for the management of these resources but not accountable for utilization of direct support to NGOs and private sector. According to the National Treasury’s Official Development Assistance (ODA) 2010 Review Report, the Eastern Cape is the second largest recipient of ODA in relation to other provinces. The province of KwaZulu Natal, ranked number one, and the province of Limpopo was recorded as the third largest recipient of ODA. As such it is recorded that European Union is the greatest funder in the provincial government focusing in the areas of Health, Urban renewal and Local Economic Development source (National Treasury ODA 2010 Review Report). To date, no analysis has been done on ODA in the Eastern Cape. This study seeks to analyse Official Development Assistance in Eastern Cape with a view to identifying constraints and gaps that may be contributing towards the ineffectiveness of ODA in the Eastern Cape.
- Full Text:
- Date Issued: 2013
- Authors: Sotondoshe, Tolbert Hlanganisile
- Date: 2013
- Subjects: Economic assistance -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9202 , http://hdl.handle.net/10948/d1020422
- Description: In this study Official Development Assistance (ODA) is defined as resource flows from international community in the form of grants, technical assistance, support and financial co-operation. Government is held partially responsible or accountable for the management of these resources but not accountable for utilization of direct support to NGOs and private sector. According to the National Treasury’s Official Development Assistance (ODA) 2010 Review Report, the Eastern Cape is the second largest recipient of ODA in relation to other provinces. The province of KwaZulu Natal, ranked number one, and the province of Limpopo was recorded as the third largest recipient of ODA. As such it is recorded that European Union is the greatest funder in the provincial government focusing in the areas of Health, Urban renewal and Local Economic Development source (National Treasury ODA 2010 Review Report). To date, no analysis has been done on ODA in the Eastern Cape. This study seeks to analyse Official Development Assistance in Eastern Cape with a view to identifying constraints and gaps that may be contributing towards the ineffectiveness of ODA in the Eastern Cape.
- Full Text:
- Date Issued: 2013
Analysis of protein thermostability enhancing factors in industrially important thermus bacteria species
- Kumwenda, Benjamin, Litthauer, Derek, Tastan Bishop, Özlem, Reva, Oleg
- Authors: Kumwenda, Benjamin , Litthauer, Derek , Tastan Bishop, Özlem , Reva, Oleg
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123085 , vital:35404 , https://doi.10.4137/EBO.S12539
- Description: Elucidation of evolutionary factors that enhance protein thermostability is a critical problem and was the focus of this work on Thermus species. Pairs of orthologous sequences of T. scotoductus SA-01 and T. thermophilus HB27, with the largest negative minimum folding energy (MFE) as predicted by the UNAFold algorithm, were statistically analyzed. Favored substitutions of amino acids residues and their properties were determined. Substitutions were analyzed in modeled protein structures to determine their locations and contribution to energy differences using PyMOL and FoldX programs respectively. Dominant trends in amino acid substitutions consistent with differences in thermostability between orthologous sequences were observed. T. thermophilus thermophilic proteins showed an increase in non-polar, tiny, and charged amino acids. An abundance of alanine substituted by serine and threonine, as well as arginine substituted by glutamine and lysine was observed in T. thermophilus HB27. Structural comparison showed that stabilizing mutations occurred on surfaces and loops in protein structures.
- Full Text:
- Date Issued: 2013
- Authors: Kumwenda, Benjamin , Litthauer, Derek , Tastan Bishop, Özlem , Reva, Oleg
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123085 , vital:35404 , https://doi.10.4137/EBO.S12539
- Description: Elucidation of evolutionary factors that enhance protein thermostability is a critical problem and was the focus of this work on Thermus species. Pairs of orthologous sequences of T. scotoductus SA-01 and T. thermophilus HB27, with the largest negative minimum folding energy (MFE) as predicted by the UNAFold algorithm, were statistically analyzed. Favored substitutions of amino acids residues and their properties were determined. Substitutions were analyzed in modeled protein structures to determine their locations and contribution to energy differences using PyMOL and FoldX programs respectively. Dominant trends in amino acid substitutions consistent with differences in thermostability between orthologous sequences were observed. T. thermophilus thermophilic proteins showed an increase in non-polar, tiny, and charged amino acids. An abundance of alanine substituted by serine and threonine, as well as arginine substituted by glutamine and lysine was observed in T. thermophilus HB27. Structural comparison showed that stabilizing mutations occurred on surfaces and loops in protein structures.
- Full Text:
- Date Issued: 2013
Analysis of restricted earth fault relay application within a shunt capacitor bank design impacting on protection stability
- Authors: Minkley, Warick
- Date: 2013
- Subjects: Electric power systems -- Protection , Electric power transmission -- Equipment and supplies -- Protection
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9604 , http://hdl.handle.net/10948/d1021106
- Description: This research is aimed at analyzing the performance of the restricted earth fault relay used on a 400kV capacitor bank scheme used on the Eskom Transmission network. After the commissioning of two Capacitor Banks using the above mentioned scheme design the plant was energized. As a result of the energization the Shunt Capacitor Bank (SCB) then experienced spurious trips. The cause of the trips was found to be the operation of the restricted earth fault relay. In this research project, restricted earth fault protection on SCBs in the Eskom Transmission environment will be the area of interest. The proposed research will analyze the current SCB protection scheme in service specifically looking at the restricted earth fault circuit design and relay performance. An equivalent model of the SCB from primary plant perspective based on theory will be derived. Recording and analyzing of Comtrade transient waveforms respectively, when the bank is nergized, will be done in order to provide a reference base to work from. Manual alculations of various parameters from the derived model including transient inrush currents and fault currents will be performed to access applicable scheme parameters. Further calculations will include the voltage setting for the restricted earth fault relay. As a result of the analysis a recommendation will be made on a viable solution or a revised design will be put forward, based on the results, to improve the scheme’s performance. The protection scheme is used on the two 400kV 100MVAR capacitor banks 11 and 12 at Hydra Substation.
- Full Text:
- Date Issued: 2013
- Authors: Minkley, Warick
- Date: 2013
- Subjects: Electric power systems -- Protection , Electric power transmission -- Equipment and supplies -- Protection
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9604 , http://hdl.handle.net/10948/d1021106
- Description: This research is aimed at analyzing the performance of the restricted earth fault relay used on a 400kV capacitor bank scheme used on the Eskom Transmission network. After the commissioning of two Capacitor Banks using the above mentioned scheme design the plant was energized. As a result of the energization the Shunt Capacitor Bank (SCB) then experienced spurious trips. The cause of the trips was found to be the operation of the restricted earth fault relay. In this research project, restricted earth fault protection on SCBs in the Eskom Transmission environment will be the area of interest. The proposed research will analyze the current SCB protection scheme in service specifically looking at the restricted earth fault circuit design and relay performance. An equivalent model of the SCB from primary plant perspective based on theory will be derived. Recording and analyzing of Comtrade transient waveforms respectively, when the bank is nergized, will be done in order to provide a reference base to work from. Manual alculations of various parameters from the derived model including transient inrush currents and fault currents will be performed to access applicable scheme parameters. Further calculations will include the voltage setting for the restricted earth fault relay. As a result of the analysis a recommendation will be made on a viable solution or a revised design will be put forward, based on the results, to improve the scheme’s performance. The protection scheme is used on the two 400kV 100MVAR capacitor banks 11 and 12 at Hydra Substation.
- Full Text:
- Date Issued: 2013
Analysis of temporal and spatial variations in water storage by means of gravimetric and hydrologic methods in the region around the South African gravimetric observation station
- Authors: Mahed, Gaathier
- Date: 2013
- Subjects: Ground water -- South Africa , Geology -- South Africa , Hydrogeology -- South Africa , Water-supply -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/6714 , vital:21137
- Description: This work examines the use of gravity data and its application to subsurface water reservoirs in the immediate vicinity of the South African Geodynamic Observatory, Sutherland (SAGOS), situated in a semi-arid region of the Karoo region of South Africa, and underlain by the Karoo sedimentary rocks intruded by dolerite dykes and sills. SAGOS houses the only supergravity metre (SG) in Africa, and this thesis sets out to test its use in monitoring groundwater dynamics using hydrological and gravity data. The main aim of this work is the application of the SG data, in conjunction with hydrological data, to better understand episodic recharge of subsurface reservoirs. The importance of water as a resource, globally and specifically the Karoo, is reviewed in conjunction with supply and demand of water. This is to contextualise the socio-economic, technical as well as policy issues related to water resource management. Applicable technologies for water resource management and efficient water use are highlighted and the application of gravity to hydrology is introduced, including satellite as well as ground based tools. In addition, arid zone hydrology as well as recharge and its mechanisms are analysed in order to better understand these processes when examined from gravity measurements. Issues related to understanding flow within the vadose zone as well as in secondary aquifers are examined, and gravity residuals and subsurface hydrology are highlighted. Thereafter, a conceptual groundwater flow modelof the study area is developed using multiple tools. First, the geology around SAGOS was mapped using SPOT 5 imagery and then ground truthed. Second, stable isotopes and water chemistry analysis was undertaken on water samples from selected boreholes. The results allude to preferential flow acting as the main mechanism for groundwater recharge. Follow-up pump-tests illustrate that fracture connectivity is greatest at close proximity to the dyke. Soil mapping, using aerial photography was also undertaken. Duplex soils, enriched with clay at depth, dominate the study area. Using in-situ infiltration tests, it is shown that the alluvium, which lines the river beds, has a higher hydraulic conductivity than the other soils, confirming that these streams act as preferential conduits for subsurface recharge. Precipitation events were correlated against gravity residuals at 4 wells, over different time periods. The results are examined using time series analyses. Gravity residuals from well SA BK07, over a period of 24 hours after the rainfall event, delineate instances of negative correlations, as well as strong positive correlations (of up to 0.9). On the whole however, correlations between gravity and groundwater at SA BK07 are variable and weak, and in conjunction with water level measurements and water chemistry, the data suggest that this well is located in a dynamic conduit (throughflow) and not in a permanent groundwater reservoir. By contrast, other wells show strong positive correlations between gravity residuals and water levels following episodic recharge events for a later time series. Correlations between the water levels and gravity residuals in wells SA BK04, SA BK05 and SA BK 01 are in excess of 0.7 for specific rainfall events. In summary, the results suggests that gravity is an excellent tool for measuring episodic groundwater recharge within the immediate vicinity of the SAGOS. This implies that gravity can aid in monitoring groundwater losses/gains in arid and semi-arid areas. Recommendations for future work are highlighted at the end; these include the possible use of hydrological modelling of reservoirs at various scales and then comparing these results to the SG as well as GOCE and GRACE satellites data, and then improving numerical modelling of the groundwater dynamics for sites like Sutherland and the surrounding arid Karoo region, where sparse water shortages, and potential pollution related to fracking for shale-gas, are likely to compete with established water needs for farming and human consumption. It is also suggested that the gravity modelling be examined to better understand site specific scenarios and thus aid in improving the processing of the gravity signal.
- Full Text:
- Date Issued: 2013
- Authors: Mahed, Gaathier
- Date: 2013
- Subjects: Ground water -- South Africa , Geology -- South Africa , Hydrogeology -- South Africa , Water-supply -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/6714 , vital:21137
- Description: This work examines the use of gravity data and its application to subsurface water reservoirs in the immediate vicinity of the South African Geodynamic Observatory, Sutherland (SAGOS), situated in a semi-arid region of the Karoo region of South Africa, and underlain by the Karoo sedimentary rocks intruded by dolerite dykes and sills. SAGOS houses the only supergravity metre (SG) in Africa, and this thesis sets out to test its use in monitoring groundwater dynamics using hydrological and gravity data. The main aim of this work is the application of the SG data, in conjunction with hydrological data, to better understand episodic recharge of subsurface reservoirs. The importance of water as a resource, globally and specifically the Karoo, is reviewed in conjunction with supply and demand of water. This is to contextualise the socio-economic, technical as well as policy issues related to water resource management. Applicable technologies for water resource management and efficient water use are highlighted and the application of gravity to hydrology is introduced, including satellite as well as ground based tools. In addition, arid zone hydrology as well as recharge and its mechanisms are analysed in order to better understand these processes when examined from gravity measurements. Issues related to understanding flow within the vadose zone as well as in secondary aquifers are examined, and gravity residuals and subsurface hydrology are highlighted. Thereafter, a conceptual groundwater flow modelof the study area is developed using multiple tools. First, the geology around SAGOS was mapped using SPOT 5 imagery and then ground truthed. Second, stable isotopes and water chemistry analysis was undertaken on water samples from selected boreholes. The results allude to preferential flow acting as the main mechanism for groundwater recharge. Follow-up pump-tests illustrate that fracture connectivity is greatest at close proximity to the dyke. Soil mapping, using aerial photography was also undertaken. Duplex soils, enriched with clay at depth, dominate the study area. Using in-situ infiltration tests, it is shown that the alluvium, which lines the river beds, has a higher hydraulic conductivity than the other soils, confirming that these streams act as preferential conduits for subsurface recharge. Precipitation events were correlated against gravity residuals at 4 wells, over different time periods. The results are examined using time series analyses. Gravity residuals from well SA BK07, over a period of 24 hours after the rainfall event, delineate instances of negative correlations, as well as strong positive correlations (of up to 0.9). On the whole however, correlations between gravity and groundwater at SA BK07 are variable and weak, and in conjunction with water level measurements and water chemistry, the data suggest that this well is located in a dynamic conduit (throughflow) and not in a permanent groundwater reservoir. By contrast, other wells show strong positive correlations between gravity residuals and water levels following episodic recharge events for a later time series. Correlations between the water levels and gravity residuals in wells SA BK04, SA BK05 and SA BK 01 are in excess of 0.7 for specific rainfall events. In summary, the results suggests that gravity is an excellent tool for measuring episodic groundwater recharge within the immediate vicinity of the SAGOS. This implies that gravity can aid in monitoring groundwater losses/gains in arid and semi-arid areas. Recommendations for future work are highlighted at the end; these include the possible use of hydrological modelling of reservoirs at various scales and then comparing these results to the SG as well as GOCE and GRACE satellites data, and then improving numerical modelling of the groundwater dynamics for sites like Sutherland and the surrounding arid Karoo region, where sparse water shortages, and potential pollution related to fracking for shale-gas, are likely to compete with established water needs for farming and human consumption. It is also suggested that the gravity modelling be examined to better understand site specific scenarios and thus aid in improving the processing of the gravity signal.
- Full Text:
- Date Issued: 2013
Analysis of the implementation of corporate level strategy in a South Afircan furniture retailer
- Authors: Nkatsha, Thembinkosi Sydney
- Date: 2013
- Subjects: Reengineering (Management) , Consolidation and merger of corporations -- South Africa -- Case studies , Organizational change -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:856 , http://hdl.handle.net/10962/d1018272
- Description: [Integrative Summary] This study is situated in the complex field of change management, and strategy execution. The study focuses on the corporate level restructuring of Ellerine Holdings Limited (EHL), subsequent to its acquisition by the micro lending financial institution African Bank Investments Limited (ABIL). The interest of the researcher was aroused by the uniqueness of the relationship. This was the first of its kind in a South African context, where a banker owned a furniture retailer. The restructuring was undertaken shortly after the acquisition. This research paper adopted a case study approach, in describing the restructuring initiative that took place in EHL, focusing on the period between January 2008 and the end of 2010/ 11 financial year on the 30th of September 2011. The case captures the significant phases of the restructuring including a background of (1) the protagonist, Toni Fourie (Chief Executive Officer), (2) EHL as the researched company, (3) the industry it operates in, and (4) the case content. Brief teaching notes have been provided to explain the teaching value of the case and to assist with its delivery in the classroom. Attention is drawn to a presentation by the protagonist in November 2011, named 'A CEO Insight' where he gave an overview and insights of the road travelled in restructuring Ellerine Holdings Limited, and more importantly highlights the following about the purpose and nature of the restructuring of the organisation. • A plan to change the way the industry works. • The creation of a profitable, stand-alone retail business through: o The sale of two companies, the closure of two companies and consolidating from thirteen to six brands. o Separating financial services from retail. o Moving the financial services component to African Bank, also a subsidiary of ABIL. o Redesigning the credit model. o Completion of twelve system changes. • Over R600million reduction in cost • A place where people want to work. The restructuring outlined above represents a major shake-up in many aspects of the corporation. The main challenge for Toni Fourie and his team was: how best could they restructure EHL to extract synergies between their two subsidiaries Ellerine Holdings Limited & African Bank to increase shareholders ' value at Group level. The case seeks to describe this in detail. The overarching strategy underpinning the restructuring of the researched corporation is premised on the price volume elasticity equation, by reducing the cost of credit, thereby driving pricing down within the brands, and facilitating more people having access to affordable credit. The case study of the restructuring is presented in Section 1. A review of relevant literature on strategy implementation is presented in Section 2, focusing on restructuring. Successful implementation of strategies only takes place with structures that are developed by organisations to support the achievement of their strategic objectives. Organisational architecture and design have a critical role to play in the execution of organisational strategies. Nadler and Tushman (1978) emphasise the importance of congruence in the organisational design, for the organization to not only deliver superior results but to sustain them over a period of time. Research by Okumus (2005) seems to tell us that the lack of credible framework to implement strategy, has contributed the high failure rate of strategy initiatives. Although this is a strategy implementation case, it also touches on aspects of leadership - mainly the architectural role - and the role, or influence of strategic leadership, in restructuring the corporation. The results of this research paper were achieved by following a specific research methodology. The aim of the research was to analyse the restructuring of the researched company at corporate level, having the following objectives in mind; • Understanding the strategy. • Analysing the design decisions in the light of the strategy chosen by the top management of Ellerine Holdings Limited. • Analysing what monitoring and control measures had been designed to facilitate the corporate restructuring. Data was collected through documentation of the corporation that was made available to the researcher on request, as well as those that are in the public domain, and an interview with the CEO of the researched company. The interview was conducted after analysing the documentation (Hakim, 2000). The Methodology is detailed in Section 3. The researcher hopes that the case study will contribute to learning about business leadership and strategic management. The case should develop an understanding of the complexities related to strategy execution at corporate level, particularly the restructuring aspect of it.
- Full Text:
- Date Issued: 2013
- Authors: Nkatsha, Thembinkosi Sydney
- Date: 2013
- Subjects: Reengineering (Management) , Consolidation and merger of corporations -- South Africa -- Case studies , Organizational change -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:856 , http://hdl.handle.net/10962/d1018272
- Description: [Integrative Summary] This study is situated in the complex field of change management, and strategy execution. The study focuses on the corporate level restructuring of Ellerine Holdings Limited (EHL), subsequent to its acquisition by the micro lending financial institution African Bank Investments Limited (ABIL). The interest of the researcher was aroused by the uniqueness of the relationship. This was the first of its kind in a South African context, where a banker owned a furniture retailer. The restructuring was undertaken shortly after the acquisition. This research paper adopted a case study approach, in describing the restructuring initiative that took place in EHL, focusing on the period between January 2008 and the end of 2010/ 11 financial year on the 30th of September 2011. The case captures the significant phases of the restructuring including a background of (1) the protagonist, Toni Fourie (Chief Executive Officer), (2) EHL as the researched company, (3) the industry it operates in, and (4) the case content. Brief teaching notes have been provided to explain the teaching value of the case and to assist with its delivery in the classroom. Attention is drawn to a presentation by the protagonist in November 2011, named 'A CEO Insight' where he gave an overview and insights of the road travelled in restructuring Ellerine Holdings Limited, and more importantly highlights the following about the purpose and nature of the restructuring of the organisation. • A plan to change the way the industry works. • The creation of a profitable, stand-alone retail business through: o The sale of two companies, the closure of two companies and consolidating from thirteen to six brands. o Separating financial services from retail. o Moving the financial services component to African Bank, also a subsidiary of ABIL. o Redesigning the credit model. o Completion of twelve system changes. • Over R600million reduction in cost • A place where people want to work. The restructuring outlined above represents a major shake-up in many aspects of the corporation. The main challenge for Toni Fourie and his team was: how best could they restructure EHL to extract synergies between their two subsidiaries Ellerine Holdings Limited & African Bank to increase shareholders ' value at Group level. The case seeks to describe this in detail. The overarching strategy underpinning the restructuring of the researched corporation is premised on the price volume elasticity equation, by reducing the cost of credit, thereby driving pricing down within the brands, and facilitating more people having access to affordable credit. The case study of the restructuring is presented in Section 1. A review of relevant literature on strategy implementation is presented in Section 2, focusing on restructuring. Successful implementation of strategies only takes place with structures that are developed by organisations to support the achievement of their strategic objectives. Organisational architecture and design have a critical role to play in the execution of organisational strategies. Nadler and Tushman (1978) emphasise the importance of congruence in the organisational design, for the organization to not only deliver superior results but to sustain them over a period of time. Research by Okumus (2005) seems to tell us that the lack of credible framework to implement strategy, has contributed the high failure rate of strategy initiatives. Although this is a strategy implementation case, it also touches on aspects of leadership - mainly the architectural role - and the role, or influence of strategic leadership, in restructuring the corporation. The results of this research paper were achieved by following a specific research methodology. The aim of the research was to analyse the restructuring of the researched company at corporate level, having the following objectives in mind; • Understanding the strategy. • Analysing the design decisions in the light of the strategy chosen by the top management of Ellerine Holdings Limited. • Analysing what monitoring and control measures had been designed to facilitate the corporate restructuring. Data was collected through documentation of the corporation that was made available to the researcher on request, as well as those that are in the public domain, and an interview with the CEO of the researched company. The interview was conducted after analysing the documentation (Hakim, 2000). The Methodology is detailed in Section 3. The researcher hopes that the case study will contribute to learning about business leadership and strategic management. The case should develop an understanding of the complexities related to strategy execution at corporate level, particularly the restructuring aspect of it.
- Full Text:
- Date Issued: 2013
Analysis of the influence of peer education programmes on learner behaviour, the case of Bulelani high school, Queenstown
- Authors: Bedula, Nomanani Doris
- Date: 2013
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/1165 , vital:26532
- Description: This study focuses on the influence of peer education programmes on learner behaviour. Peer education is a critical approach for behaviour-change. The presentation had two objectives. The first objective was to determine the nature and extent of peer education programmes policy implementation in the school under study. The second objective was to determine the impact of the policy on learner behaviour. A questionnaire which was administered to all trained peer educators at Bulelani High School indicated that all respondents agreed that peer education was educationally relevant and offered accurate information. Furthermore, results indicated that older learners strongly agreed that peer education programmes have an impact on behavioural changes than younger learners who merely agreed on that. The results also showed that the duration of involvement in peer education programmes influences the opinion on the impact of peer education on behavioural changes. Looking at the respondents ’gender, the researcher could not find any evidence that the impact of peer education on behavioural change depends on the gender of the respondent and therefore concludes that opinions are independent of gender. The study shows that in schools where peer education programmes are well implemented and monitored, they do impact on learner-behaviour in a positive way.
- Full Text:
- Date Issued: 2013
- Authors: Bedula, Nomanani Doris
- Date: 2013
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/1165 , vital:26532
- Description: This study focuses on the influence of peer education programmes on learner behaviour. Peer education is a critical approach for behaviour-change. The presentation had two objectives. The first objective was to determine the nature and extent of peer education programmes policy implementation in the school under study. The second objective was to determine the impact of the policy on learner behaviour. A questionnaire which was administered to all trained peer educators at Bulelani High School indicated that all respondents agreed that peer education was educationally relevant and offered accurate information. Furthermore, results indicated that older learners strongly agreed that peer education programmes have an impact on behavioural changes than younger learners who merely agreed on that. The results also showed that the duration of involvement in peer education programmes influences the opinion on the impact of peer education on behavioural changes. Looking at the respondents ’gender, the researcher could not find any evidence that the impact of peer education on behavioural change depends on the gender of the respondent and therefore concludes that opinions are independent of gender. The study shows that in schools where peer education programmes are well implemented and monitored, they do impact on learner-behaviour in a positive way.
- Full Text:
- Date Issued: 2013
Anchovy and Sardine in Algoa Bay and their relationship with response variables in two threatened avian predators
- Authors: Potter, Cara-Paige
- Date: 2013
- Subjects: Fishes -- Predators of -- South Africa -- Algoa Bay , Anchovies -- South Africa , Sardines -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10730 , http://hdl.handle.net/10948/d1021130
- Description: Huge populations of sardine and anchovy exist in the four major upwelling systems around the world. These fish are both important ecologically and economically. Pelagic fish dominate the mid trophic level and can exert both a top-down control of zooplankton and a bottom-up control on predatory fish and marine top predators. They also make up a substantial contribution of the world catches in seas around the world where they co-exist in upwelling areas. The fluctuations of sardine and anchovy are largely influenced by recruitment from the larval stage and by the physical environmental forces that determine the planktonic compositions upon which they feed. In southern Africa, the biology and behaviour of two threatened seabird species, African penguins (Spheniscus demersus) and Cape gannets (Morus capensis), are directly influenced by the availability of sardine (Sardinops sagax) and anchovy (Engraulis encrasicolus). This study aimed to provide further insight into the fluctuations of sardine and anchovy in relation to the variability of environmental factors such as wind, sea surface temperature, rainfall and plankton abundance, focusing specifically on Algoa Bay in the Eastern Cape, South Africa. Algoa Bay is particularly important as it is home to the world’s largest African penguin colony and the world’s largest gannetry. Therefore, to further investigate the populations of these two seabird species, the fluctuations of their food source were studied.
- Full Text:
- Date Issued: 2013
- Authors: Potter, Cara-Paige
- Date: 2013
- Subjects: Fishes -- Predators of -- South Africa -- Algoa Bay , Anchovies -- South Africa , Sardines -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10730 , http://hdl.handle.net/10948/d1021130
- Description: Huge populations of sardine and anchovy exist in the four major upwelling systems around the world. These fish are both important ecologically and economically. Pelagic fish dominate the mid trophic level and can exert both a top-down control of zooplankton and a bottom-up control on predatory fish and marine top predators. They also make up a substantial contribution of the world catches in seas around the world where they co-exist in upwelling areas. The fluctuations of sardine and anchovy are largely influenced by recruitment from the larval stage and by the physical environmental forces that determine the planktonic compositions upon which they feed. In southern Africa, the biology and behaviour of two threatened seabird species, African penguins (Spheniscus demersus) and Cape gannets (Morus capensis), are directly influenced by the availability of sardine (Sardinops sagax) and anchovy (Engraulis encrasicolus). This study aimed to provide further insight into the fluctuations of sardine and anchovy in relation to the variability of environmental factors such as wind, sea surface temperature, rainfall and plankton abundance, focusing specifically on Algoa Bay in the Eastern Cape, South Africa. Algoa Bay is particularly important as it is home to the world’s largest African penguin colony and the world’s largest gannetry. Therefore, to further investigate the populations of these two seabird species, the fluctuations of their food source were studied.
- Full Text:
- Date Issued: 2013
Ancient and modern hybridization between Lucilia sericata and L. cuprina (Diptera: Calliphoridae)
- Williams, Kirstin A, Villet, Martin H
- Authors: Williams, Kirstin A , Villet, Martin H
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/442633 , vital:74017 , 10.14411/eje.2013.029
- Description: There are important but inconsistent differences in breeding site preference between the blow flies Lucilia sericata (Meigen, 1826) and L. cuprina (Wiedemann, 1830)(Diptera: Calliphoridae) that have significance for medical and veterinary science. These inconsistencies might arise from hybridisation. The species are difficult to distinguish using external morphology, although the male genitalia are distinctive and there are reliable molecular markers. Molecular evidence of modern hybridisation, derived from a newly developed nuclear marker, the period (per) gene, is presented here. This has implications for identifications of these species based on mtDNA, and may lead to an explanation of the medical and veterinary anomalies noted in these species.
- Full Text:
- Date Issued: 2013
- Authors: Williams, Kirstin A , Villet, Martin H
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/442633 , vital:74017 , 10.14411/eje.2013.029
- Description: There are important but inconsistent differences in breeding site preference between the blow flies Lucilia sericata (Meigen, 1826) and L. cuprina (Wiedemann, 1830)(Diptera: Calliphoridae) that have significance for medical and veterinary science. These inconsistencies might arise from hybridisation. The species are difficult to distinguish using external morphology, although the male genitalia are distinctive and there are reliable molecular markers. Molecular evidence of modern hybridisation, derived from a newly developed nuclear marker, the period (per) gene, is presented here. This has implications for identifications of these species based on mtDNA, and may lead to an explanation of the medical and veterinary anomalies noted in these species.
- Full Text:
- Date Issued: 2013