Investigation of the microstructure of nuclear grade matrix graphite
- Authors: Downey, Justin Michael
- Date: 2009
- Subjects: Graphite -- South Africa , Microstructure , Nanostructured materials -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10540 , http://hdl.handle.net/10948/944 , Graphite -- South Africa , Microstructure , Nanostructured materials -- South Africa
- Description: This dissertation focuses on the investigation of the microstructures of two nuclear grade matrix graphites. These graphites were intended for use in the core components of a high temperature test reactor (HTTR) of the pebble bed modular reactor (PBMR) design. The graphites were provided in the form of fuel spheres and a reflector block. The techniques used in the analysis of the materials include fracturing, etching, scanning electron microscopy (SEM), nano-indentation, x-ray diffraction (XRD) and transmission electron microscopy (TEM). The microstructures of the materials were characterized successfully. The fuel sphere material consisted of a high concentration of curved graphite flakes and grains in contact with turbostratic matrix graphite. The well graphitized flakes and grains were polycrystalline in nature. Delamination cracks were prevalent in the graphite crystallites. There was no significant difference in the microstructures of the center, interior and surface regions of the fuel sphere material. No evidence of amorphous carbon or resin residues was found. The reflector material consisted of a low concentration of graphite crystallites embedded within turbostratic matrix graphite. Delamination cracks were observed within the graphite crystallites, and many cavities were present in the material. TEM observation also revealed the presence of diamond crystallites. It was concluded that the fuel sphere graphite was most probably suitable for use as is, provided that the material also possessed other required properties for use in a HTTR. The reflector material however was considered to be unsuitable for use in a HTTR. It was thus suggested that the reflector material could be made more suitable by sufficient graphitization of the turbostratic graphite which formed the bulk of the material.
- Full Text:
- Date Issued: 2009
- Authors: Downey, Justin Michael
- Date: 2009
- Subjects: Graphite -- South Africa , Microstructure , Nanostructured materials -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10540 , http://hdl.handle.net/10948/944 , Graphite -- South Africa , Microstructure , Nanostructured materials -- South Africa
- Description: This dissertation focuses on the investigation of the microstructures of two nuclear grade matrix graphites. These graphites were intended for use in the core components of a high temperature test reactor (HTTR) of the pebble bed modular reactor (PBMR) design. The graphites were provided in the form of fuel spheres and a reflector block. The techniques used in the analysis of the materials include fracturing, etching, scanning electron microscopy (SEM), nano-indentation, x-ray diffraction (XRD) and transmission electron microscopy (TEM). The microstructures of the materials were characterized successfully. The fuel sphere material consisted of a high concentration of curved graphite flakes and grains in contact with turbostratic matrix graphite. The well graphitized flakes and grains were polycrystalline in nature. Delamination cracks were prevalent in the graphite crystallites. There was no significant difference in the microstructures of the center, interior and surface regions of the fuel sphere material. No evidence of amorphous carbon or resin residues was found. The reflector material consisted of a low concentration of graphite crystallites embedded within turbostratic matrix graphite. Delamination cracks were observed within the graphite crystallites, and many cavities were present in the material. TEM observation also revealed the presence of diamond crystallites. It was concluded that the fuel sphere graphite was most probably suitable for use as is, provided that the material also possessed other required properties for use in a HTTR. The reflector material however was considered to be unsuitable for use in a HTTR. It was thus suggested that the reflector material could be made more suitable by sufficient graphitization of the turbostratic graphite which formed the bulk of the material.
- Full Text:
- Date Issued: 2009
Is inflation targeting a viable option for a developing country?: the case of Malawi
- Hompashe, Dumisani MacDonald
- Authors: Hompashe, Dumisani MacDonald
- Date: 2009
- Subjects: Inflation (Finance) -- Malawi -- Case studies , Banks and banking, Central -- Malawi , Monetary policy -- Malawi , Finance -- Developing countries , Debts, External -- Developing countries
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:943 , http://hdl.handle.net/10962/d1002676 , Inflation (Finance) -- Malawi -- Case studies , Banks and banking, Central -- Malawi , Monetary policy -- Malawi , Finance -- Developing countries , Debts, External -- Developing countries
- Description: The distinctive features of inflation targeting include the publishing of the formal (official) target band or point target for the rate of inflation at one or more time horizons and the explicit confirmation that low and steady inflation is the long-run objective of monetary policy. There are four main preconditions of inflation targeting: 1) an independent central bank that is free from fiscal and political pressures; 2) a central bank that has both the ability to forecast inflation and the capability to model inflation data; 3) the presence of fully deregulated prices and an economy that is affected by changes of commodity prices, as well as exchange rates; and 4) the presence of sound banking system and well developed capital markets. In most developing countries, the use of seigniorage revenues as a source of financing government debts, the lack of commitment by monetary authorities to low inflation as a primary goal, the absence of the central bank’s functional independence, and of powerful models to make domestic inflation forecasts, prevent the satisfaction of these preconditions. This dissertation investigates the extent to which Malawi meets the preconditions for inflation targeting by comparing the situation in that country to other developing countries, which have already adopted the framework. Malawi is committed to the central bank’s functional independence as well as the pursuit of prudent fiscal policy measures for the attainment of low inflation. Despite the failure to meet all the preconditions, this study recommends that Malawi should adopt an inflation targeting framework due to the strength of commitment of the monetary authorities in satisfying these preconditions.
- Full Text:
- Date Issued: 2009
- Authors: Hompashe, Dumisani MacDonald
- Date: 2009
- Subjects: Inflation (Finance) -- Malawi -- Case studies , Banks and banking, Central -- Malawi , Monetary policy -- Malawi , Finance -- Developing countries , Debts, External -- Developing countries
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:943 , http://hdl.handle.net/10962/d1002676 , Inflation (Finance) -- Malawi -- Case studies , Banks and banking, Central -- Malawi , Monetary policy -- Malawi , Finance -- Developing countries , Debts, External -- Developing countries
- Description: The distinctive features of inflation targeting include the publishing of the formal (official) target band or point target for the rate of inflation at one or more time horizons and the explicit confirmation that low and steady inflation is the long-run objective of monetary policy. There are four main preconditions of inflation targeting: 1) an independent central bank that is free from fiscal and political pressures; 2) a central bank that has both the ability to forecast inflation and the capability to model inflation data; 3) the presence of fully deregulated prices and an economy that is affected by changes of commodity prices, as well as exchange rates; and 4) the presence of sound banking system and well developed capital markets. In most developing countries, the use of seigniorage revenues as a source of financing government debts, the lack of commitment by monetary authorities to low inflation as a primary goal, the absence of the central bank’s functional independence, and of powerful models to make domestic inflation forecasts, prevent the satisfaction of these preconditions. This dissertation investigates the extent to which Malawi meets the preconditions for inflation targeting by comparing the situation in that country to other developing countries, which have already adopted the framework. Malawi is committed to the central bank’s functional independence as well as the pursuit of prudent fiscal policy measures for the attainment of low inflation. Despite the failure to meet all the preconditions, this study recommends that Malawi should adopt an inflation targeting framework due to the strength of commitment of the monetary authorities in satisfying these preconditions.
- Full Text:
- Date Issued: 2009
Jeffrey Lionel Dahmer : a psychobiographical study
- Authors: Chéze, Eldon
- Date: 2009
- Subjects: Dahmer, Jeffrey , Personality development -- South Africa , Murderers -- South Africa -- Psychology , Adlerian psychology -- South Africa , Serial murder investigation -- South Africa -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9884 , http://hdl.handle.net/10948/1221 , Dahmer, Jeffrey , Personality development -- South Africa , Murderers -- South Africa -- Psychology , Adlerian psychology -- South Africa , Serial murder investigation -- South Africa -- Psychological aspects
- Description: Serial crime is an element of society that continues to disturb and fascinate scholars. There is thus a need to understand the uniqueness of serial murderers and their psychological development. The field of psychobiography is a qualitative approach to uncover the story of an individual life through greater understanding of psychological concepts. Psychobiographical research is invaluable in the application of theory to the finished lives of exemplary or enigmatic individuals to develop and test theories of human development. Jeffrey Lionel Dahmer (1960 – 1994), a cannibalistic serial killer who killed 17 young men, served as the single psychobiographical subject in this study. Dahmer was selected based on interest value, his uniqueness and the lack of a specifically academic and psychologically focused case study on his life. A qualitative psychobiographical research method was utilized in this study. The primary aim of the research was to explore and describe Jeffrey Dahmer’s personality development across his lifespan. This was achieved by applying Erikson’s (1950) psychosocial theory of staged developmental crises to the lifespan developmental process and Adler’s (1929) dynamic individual psychology to provide a more comprehensive idiographic interpretation of Dahmer as an individual. Jeffrey Dahmer’s life history was uncovered in this psychobiographical case study research through the systematic and consistent collection, analysis and interpretation of life history materials, which highlighted five significant historical periods: (a) Childhood of Fantasy, (b) The Quiet Loner, (c) Hiatus – or Build-up, (d) Seeking a Compliant Partner and (e) Arrest, Trial and Death. The two theoretical frameworks were used to discern, transform and reconstruct his life into a coherent and illuminating narrative of his psychological movement through life. Alexander’s (1988) model of identifying salient themes was used to analyze data for analytical generalization (Yin, 1994). A conceptual framework derived from the two theoretical perspectives was constructed to organize and integrate data and to guide the presentation and discussion of the findings of the study in an integrative and comprehensive manner. The findings suggested that both theoretical perspectives considered the biopsychosocial as well as cultural and historical influences of situations and experiences in Dahmer’s personality development throughout the lifespan. Adlerian theory indicated that Dahmer held a socially useless lifestyle whose movement was guided purposively towards a fictional goal xxii of godlikeness through creative, concrete expressions of personal superiority. Eriksonian theory held that Dahmer remained in role confusion, which was viewed as a functional, fragmented identity to survive in society and achieve a fantasy. Thus, both theories indicated, despite their different conceptualizations, that Dahmer’s personality development was ultimately not socially beneficial. The study of Dahmer’s personality development has provided a positive demonstration of the value of both Erikson (1950) and Adler’s (1929) theories to understand the processes of personality development in an individual life. It has further highlighted the uniqueness of individual responses to life tasks and consequently unlocked the possibility of perceiving people and their actions differently. Recommendations were made for future research undertakings that utilize a psychobiographical research design and methodology to uncover, illuminate and reconstruct the lives of enigmatic personalities.
- Full Text:
- Date Issued: 2009
- Authors: Chéze, Eldon
- Date: 2009
- Subjects: Dahmer, Jeffrey , Personality development -- South Africa , Murderers -- South Africa -- Psychology , Adlerian psychology -- South Africa , Serial murder investigation -- South Africa -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9884 , http://hdl.handle.net/10948/1221 , Dahmer, Jeffrey , Personality development -- South Africa , Murderers -- South Africa -- Psychology , Adlerian psychology -- South Africa , Serial murder investigation -- South Africa -- Psychological aspects
- Description: Serial crime is an element of society that continues to disturb and fascinate scholars. There is thus a need to understand the uniqueness of serial murderers and their psychological development. The field of psychobiography is a qualitative approach to uncover the story of an individual life through greater understanding of psychological concepts. Psychobiographical research is invaluable in the application of theory to the finished lives of exemplary or enigmatic individuals to develop and test theories of human development. Jeffrey Lionel Dahmer (1960 – 1994), a cannibalistic serial killer who killed 17 young men, served as the single psychobiographical subject in this study. Dahmer was selected based on interest value, his uniqueness and the lack of a specifically academic and psychologically focused case study on his life. A qualitative psychobiographical research method was utilized in this study. The primary aim of the research was to explore and describe Jeffrey Dahmer’s personality development across his lifespan. This was achieved by applying Erikson’s (1950) psychosocial theory of staged developmental crises to the lifespan developmental process and Adler’s (1929) dynamic individual psychology to provide a more comprehensive idiographic interpretation of Dahmer as an individual. Jeffrey Dahmer’s life history was uncovered in this psychobiographical case study research through the systematic and consistent collection, analysis and interpretation of life history materials, which highlighted five significant historical periods: (a) Childhood of Fantasy, (b) The Quiet Loner, (c) Hiatus – or Build-up, (d) Seeking a Compliant Partner and (e) Arrest, Trial and Death. The two theoretical frameworks were used to discern, transform and reconstruct his life into a coherent and illuminating narrative of his psychological movement through life. Alexander’s (1988) model of identifying salient themes was used to analyze data for analytical generalization (Yin, 1994). A conceptual framework derived from the two theoretical perspectives was constructed to organize and integrate data and to guide the presentation and discussion of the findings of the study in an integrative and comprehensive manner. The findings suggested that both theoretical perspectives considered the biopsychosocial as well as cultural and historical influences of situations and experiences in Dahmer’s personality development throughout the lifespan. Adlerian theory indicated that Dahmer held a socially useless lifestyle whose movement was guided purposively towards a fictional goal xxii of godlikeness through creative, concrete expressions of personal superiority. Eriksonian theory held that Dahmer remained in role confusion, which was viewed as a functional, fragmented identity to survive in society and achieve a fantasy. Thus, both theories indicated, despite their different conceptualizations, that Dahmer’s personality development was ultimately not socially beneficial. The study of Dahmer’s personality development has provided a positive demonstration of the value of both Erikson (1950) and Adler’s (1929) theories to understand the processes of personality development in an individual life. It has further highlighted the uniqueness of individual responses to life tasks and consequently unlocked the possibility of perceiving people and their actions differently. Recommendations were made for future research undertakings that utilize a psychobiographical research design and methodology to uncover, illuminate and reconstruct the lives of enigmatic personalities.
- Full Text:
- Date Issued: 2009
Job satisfaction of public sector pharmacists in the Nelson Mandela Metropole
- Authors: Matshotyana, Kidwell
- Date: 2009
- Subjects: Job satisfaction , Employee retention , Pharmacists -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10143 , http://hdl.handle.net/10948/1006 , Job satisfaction , Employee retention , Pharmacists -- South Africa -- Port Elizabeth
- Description: There is a severe shortage of pharmacists in the Nelson Mandela Metropole with a current vacancy rate of over 50 percent on the approved posts for pharmacists (PERSAL 31 December 2007). The metropole has struggled to retain pharmacists in spite of the urban setting. The aim of this research was to measure the level of job satisfaction amongst pharmacists working in the public sector of the Nelson Mandela Metropole. The research objective was to conduct a questionnaire-based survey of pharmacists working in public sector facilities in the Nelson Mandela Metropole in order to assess their levels of job satisfaction, and report the findings with appropriate recommendations to management. For this study, the modified JDI Index survey was used focusing on the subscales; work, pay, promotion, supervision, co-workers and patient interaction. Possible retention strategies were also investigated through the use of open ended questions. The questionnaire was administered to 30 pharmacists in full time employment within the public sector in the Nelson Mandela Metropole. A total of 25 questionnaires were returned giving an 83.3 percent response rate. The pharmacists were generally satisfied with the job, their pharmacy co-workers, patient interaction and supervision but were not satisfied with salary and promotion opportunities in the public sector. Using a score from 1 to 5, with 5 indicating a level of high satisfaction, the mean scores for the six subscales were, job (3.2), income (2.1), patient interaction (3.3), promotion (2.0), co-workers (3.4) and supervision (3.7). Financial packages (23, n=25) and fringe benefits (22, n=25) were indicated as the most effective strategies in attracting and retaining pharmacists into the public service. The majority of respondents (15, n=25) agreed that the favourable working hours, flexibility of work, regular working hours with no weekend duties were the most vii positive aspects about their job. The negative aspects mentioned by the majority of the respondents (15, n=25) included poor remuneration, unrealistic notch increases and salaries that were not market-related and uncompetitive.
- Full Text:
- Date Issued: 2009
- Authors: Matshotyana, Kidwell
- Date: 2009
- Subjects: Job satisfaction , Employee retention , Pharmacists -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10143 , http://hdl.handle.net/10948/1006 , Job satisfaction , Employee retention , Pharmacists -- South Africa -- Port Elizabeth
- Description: There is a severe shortage of pharmacists in the Nelson Mandela Metropole with a current vacancy rate of over 50 percent on the approved posts for pharmacists (PERSAL 31 December 2007). The metropole has struggled to retain pharmacists in spite of the urban setting. The aim of this research was to measure the level of job satisfaction amongst pharmacists working in the public sector of the Nelson Mandela Metropole. The research objective was to conduct a questionnaire-based survey of pharmacists working in public sector facilities in the Nelson Mandela Metropole in order to assess their levels of job satisfaction, and report the findings with appropriate recommendations to management. For this study, the modified JDI Index survey was used focusing on the subscales; work, pay, promotion, supervision, co-workers and patient interaction. Possible retention strategies were also investigated through the use of open ended questions. The questionnaire was administered to 30 pharmacists in full time employment within the public sector in the Nelson Mandela Metropole. A total of 25 questionnaires were returned giving an 83.3 percent response rate. The pharmacists were generally satisfied with the job, their pharmacy co-workers, patient interaction and supervision but were not satisfied with salary and promotion opportunities in the public sector. Using a score from 1 to 5, with 5 indicating a level of high satisfaction, the mean scores for the six subscales were, job (3.2), income (2.1), patient interaction (3.3), promotion (2.0), co-workers (3.4) and supervision (3.7). Financial packages (23, n=25) and fringe benefits (22, n=25) were indicated as the most effective strategies in attracting and retaining pharmacists into the public service. The majority of respondents (15, n=25) agreed that the favourable working hours, flexibility of work, regular working hours with no weekend duties were the most vii positive aspects about their job. The negative aspects mentioned by the majority of the respondents (15, n=25) included poor remuneration, unrealistic notch increases and salaries that were not market-related and uncompetitive.
- Full Text:
- Date Issued: 2009
Key factors required to be classified as a world-class supplier from a South African automotive industry perspective
- Authors: Cook, Gavin Trevor
- Date: 2009
- Subjects: Automobile industry and trade -- South Africa
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9335 , http://hdl.handle.net/10948/935 , Automobile industry and trade -- South Africa
- Description: Over and above the fact that South African automotive business firms do not have the advantages of a major domestic market and are far removed from the major world markets, they face the challenges of operating in a tough and ever-changing environment. This environment is characterised by a global recession, aggressive global competition, high inflation and more demanding customers. To overcome these obstacles and to ensure their continuous success and existence, these domestic firms need to create a competitive advantage. The establishment of such a competitive advantage is dependent on a number of factors which mainly include sourcing from a world-class supplier base in terms of price, quality and service delivery. The main objective and central theme of this study is to determine the factors that are required by a supplier in the South African automotive industry to be classified as a world-class supplier. In support of the main objective, it was necessary to source the reasons why a firm would find it important to trade with a world-class supplier base, and to determine whether the current levels of supplier performance as experienced by buying firms in the Eastern Cape automotive industry, could be regarded as world-class. Furthermore, the study set out to determine the consequences to customer firms of inferior supplier performance, as well as the actions currently taken and support programmes in place to bring suppliers in line with world-class standards. As a starting point to the study, a literature review was undertaken which revealed the definite interdependence between a business firm and the environment in which it operates. The review underlined the need for environmental scanning as a means to proactively manage the impact of environmental changes on a firm. Porter’s value chain and business process re-engineering, as discussed in the study, are also perceived as means to manage environmental changes. The literature study further revealed some of the latest business trends followed by automotive business firms, as well as the expected supplier buy-in to ensure success. A statistical analysis on the quantitative data gathered, grouped specific items (questions) that relate to the study’s main objective with three respective individual supplier performance areas. A confirmatory factor analysis which focused on the three factors, namely quality, pricing and service delivery was carried out to assess the validity of the questions used for gathering the research data. The Cronbach Alphas determined for the three factors portrayed the reliability of the research instrument as acceptable. The empirical study revealed a few main factors that automotive business firms strongly perceive as being key to the establishment of a world-class supplier base. These factors are: a culture of continuous improvement; consistently meeting delivery deadlines by being able to respond to customer schedule changes; quoting fair prices and having respect for business ethics; as well as the consistent application of a quality policy which leads to conformance to specifications and subsequent high levels of product reliability. The empirical study also identified the following benefits enjoyed by customer business firms when trading with a world-class supplier base: Firms are able to be more flexible to customer schedule changes; they receive products that meet specifications; and they are able to operate at lower costs. The empirical findings with regard to the current level of supplier performance in the Eastern Cape Province automotive industry highlighted mainly three problem areas. These are late deliveries; the inability of suppliers to respond to customer schedule changes; as well as a lack of continuous improvement. Late deliveries which lead to production stoppages, with its resultant high costs, as well as the receipt of below-par quality products, were revealed as the main consequences when dealing with suppliers whose performance are not world-class. The main actions taken and programmes or incentives offered by automotive business firms to bring inferior suppliers more in line with world-class performance, include the rewarding of good suppliers by granting them more business; applying formal supplier performance evaluations; and having regular supplier audits.
- Full Text:
- Date Issued: 2009
- Authors: Cook, Gavin Trevor
- Date: 2009
- Subjects: Automobile industry and trade -- South Africa
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9335 , http://hdl.handle.net/10948/935 , Automobile industry and trade -- South Africa
- Description: Over and above the fact that South African automotive business firms do not have the advantages of a major domestic market and are far removed from the major world markets, they face the challenges of operating in a tough and ever-changing environment. This environment is characterised by a global recession, aggressive global competition, high inflation and more demanding customers. To overcome these obstacles and to ensure their continuous success and existence, these domestic firms need to create a competitive advantage. The establishment of such a competitive advantage is dependent on a number of factors which mainly include sourcing from a world-class supplier base in terms of price, quality and service delivery. The main objective and central theme of this study is to determine the factors that are required by a supplier in the South African automotive industry to be classified as a world-class supplier. In support of the main objective, it was necessary to source the reasons why a firm would find it important to trade with a world-class supplier base, and to determine whether the current levels of supplier performance as experienced by buying firms in the Eastern Cape automotive industry, could be regarded as world-class. Furthermore, the study set out to determine the consequences to customer firms of inferior supplier performance, as well as the actions currently taken and support programmes in place to bring suppliers in line with world-class standards. As a starting point to the study, a literature review was undertaken which revealed the definite interdependence between a business firm and the environment in which it operates. The review underlined the need for environmental scanning as a means to proactively manage the impact of environmental changes on a firm. Porter’s value chain and business process re-engineering, as discussed in the study, are also perceived as means to manage environmental changes. The literature study further revealed some of the latest business trends followed by automotive business firms, as well as the expected supplier buy-in to ensure success. A statistical analysis on the quantitative data gathered, grouped specific items (questions) that relate to the study’s main objective with three respective individual supplier performance areas. A confirmatory factor analysis which focused on the three factors, namely quality, pricing and service delivery was carried out to assess the validity of the questions used for gathering the research data. The Cronbach Alphas determined for the three factors portrayed the reliability of the research instrument as acceptable. The empirical study revealed a few main factors that automotive business firms strongly perceive as being key to the establishment of a world-class supplier base. These factors are: a culture of continuous improvement; consistently meeting delivery deadlines by being able to respond to customer schedule changes; quoting fair prices and having respect for business ethics; as well as the consistent application of a quality policy which leads to conformance to specifications and subsequent high levels of product reliability. The empirical study also identified the following benefits enjoyed by customer business firms when trading with a world-class supplier base: Firms are able to be more flexible to customer schedule changes; they receive products that meet specifications; and they are able to operate at lower costs. The empirical findings with regard to the current level of supplier performance in the Eastern Cape Province automotive industry highlighted mainly three problem areas. These are late deliveries; the inability of suppliers to respond to customer schedule changes; as well as a lack of continuous improvement. Late deliveries which lead to production stoppages, with its resultant high costs, as well as the receipt of below-par quality products, were revealed as the main consequences when dealing with suppliers whose performance are not world-class. The main actions taken and programmes or incentives offered by automotive business firms to bring inferior suppliers more in line with world-class performance, include the rewarding of good suppliers by granting them more business; applying formal supplier performance evaluations; and having regular supplier audits.
- Full Text:
- Date Issued: 2009
Knowledge production in a think tank: a case study of the Africa Institute of South Africa (AISA)
- Authors: Muzondo, Shingirirai
- Date: 2009
- Subjects: Knowledge management -- South Africa , Knowledge representation (Information theory) , Knowledge, Sociology of , Corporate culture -- South Africa
- Language: English
- Type: Thesis , Masters , M Bibl
- Identifier: vital:11569 , http://hdl.handle.net/10353/252 , Knowledge management -- South Africa , Knowledge representation (Information theory) , Knowledge, Sociology of , Corporate culture -- South Africa
- Description: The study sought to investigate the system of knowledge production at AISA and assess the challenges of producing knowledge at the institution. The objectives of the study were to: identify AISA‟s main achievements in knowledge production; determine AISA‟s challenges in producing knowledge; find out how AISA‟s organizational culture impacts on internal knowledge production; and suggest ways of improving knowledge production at AISA. A case study was used as a research method and purposive sampling used to select 50 cases out of a study population of 70. Questionnaires were prepared and distributed to AISA employees and where possible face-to-face interviews were conducted. Both quantitative and qualitative methods were used to analyze the data which were collected. Findings of the study may be used by governments across sub-Saharan Africa to produce relevant knowledge for formulating and implementing economic, social and technological policies. It is also important in identifying challenges that may hinder the successful production of knowledge. The study revealed that AISA has a well defined system of knowledge production and has had many achievements that have contributed to its relevance as a think tank today. The study found out that AISA has faced different challenges with the main one being organizational culture. From the findings, the researcher recommended that AISA should establish itself as a knowledge-based organization. It should also create a knowledge friendly culture as a framework for addressing the issue of organizational culture.
- Full Text:
- Date Issued: 2009
- Authors: Muzondo, Shingirirai
- Date: 2009
- Subjects: Knowledge management -- South Africa , Knowledge representation (Information theory) , Knowledge, Sociology of , Corporate culture -- South Africa
- Language: English
- Type: Thesis , Masters , M Bibl
- Identifier: vital:11569 , http://hdl.handle.net/10353/252 , Knowledge management -- South Africa , Knowledge representation (Information theory) , Knowledge, Sociology of , Corporate culture -- South Africa
- Description: The study sought to investigate the system of knowledge production at AISA and assess the challenges of producing knowledge at the institution. The objectives of the study were to: identify AISA‟s main achievements in knowledge production; determine AISA‟s challenges in producing knowledge; find out how AISA‟s organizational culture impacts on internal knowledge production; and suggest ways of improving knowledge production at AISA. A case study was used as a research method and purposive sampling used to select 50 cases out of a study population of 70. Questionnaires were prepared and distributed to AISA employees and where possible face-to-face interviews were conducted. Both quantitative and qualitative methods were used to analyze the data which were collected. Findings of the study may be used by governments across sub-Saharan Africa to produce relevant knowledge for formulating and implementing economic, social and technological policies. It is also important in identifying challenges that may hinder the successful production of knowledge. The study revealed that AISA has a well defined system of knowledge production and has had many achievements that have contributed to its relevance as a think tank today. The study found out that AISA has faced different challenges with the main one being organizational culture. From the findings, the researcher recommended that AISA should establish itself as a knowledge-based organization. It should also create a knowledge friendly culture as a framework for addressing the issue of organizational culture.
- Full Text:
- Date Issued: 2009
Labour hire: the impact of labour broking on employee job satisfaction and commitment in a number of Namibian organizations
- Shivangulula, Shirley Euginia
- Authors: Shivangulula, Shirley Euginia
- Date: 2009
- Subjects: Temporary employment -- Namibia , Industrial relations -- Namibia , Employee motivation , Labor market -- Namibia , Labor policy -- Namibia
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:3054 , http://hdl.handle.net/10962/d1002563 , Temporary employment -- Namibia , Industrial relations -- Namibia , Employee motivation , Labor market -- Namibia , Labor policy -- Namibia
- Description: Over decades, job satisfaction has generated active empirical research. Similarly, organizational commitment, another attitudinal variable in the work domain, strongly related to, but distinctly different from job satisfaction, received comparatively equal research scrutiny. However, research on the impact of labour broking on employees’ job satisfaction and organizational commitment is nonexistent in Namibia. Using a quantitative approach, within a positivist paradigm, the purpose of this thesis was to examine the impact of labour broking on employees’ job satisfaction and organizational commitment as well as to determine the dynamics that mediate such experiences. These experiences were examined through a 5-dimensional, 72-item Job Descriptive Index and a 3-dimensional, 12-item Organizational Commitment Questionnaire over a sample size of 108 temporary and permanent employees, drawn through random probability sampling in a number of Namibian organizations that make use of labour hire services. These experiences were further amplified by face-to-face interviews over a sub sample of 20 employees. Data analysis was carried out using the chi-square, correlation, t-tests and multiple regression techniques of the STATISTICA software. Drawing on the principles of the multi dimensional theory of organizational commitment, the Cornell dispositional theory of job satisfaction and the temporary employee stigmatization model, results revealed that variables of employment status, tenure, inadequate income, inappropriate supervision and fear of job losses ahead of a newly proposed piece of legislat st labour hire ractices significantly influenced job satisfaction and organizational commitment of employees. Estimates indicate that for a mere change in tenure, job satisfaction levels will significantly rise by 0.26 units, whereas organizational commitment will augment by 0.03 units. However, for every N$ fall in employees’ pay, we can expect job satisfaction levels to decrease by 26%, but with significant effects. The study recommends that organizations must adopt policies that grant permanent tenure to all their employees, position them in respected and challenging jobs in which they will grow skills and ensure that all employees are remunerated with pay that signals their contribution to the organizations. In doing so, the negative effects of labour broking will disappear and employees will be satisfied with their jobs and Tommitted to their organizations.
- Full Text:
- Date Issued: 2009
- Authors: Shivangulula, Shirley Euginia
- Date: 2009
- Subjects: Temporary employment -- Namibia , Industrial relations -- Namibia , Employee motivation , Labor market -- Namibia , Labor policy -- Namibia
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:3054 , http://hdl.handle.net/10962/d1002563 , Temporary employment -- Namibia , Industrial relations -- Namibia , Employee motivation , Labor market -- Namibia , Labor policy -- Namibia
- Description: Over decades, job satisfaction has generated active empirical research. Similarly, organizational commitment, another attitudinal variable in the work domain, strongly related to, but distinctly different from job satisfaction, received comparatively equal research scrutiny. However, research on the impact of labour broking on employees’ job satisfaction and organizational commitment is nonexistent in Namibia. Using a quantitative approach, within a positivist paradigm, the purpose of this thesis was to examine the impact of labour broking on employees’ job satisfaction and organizational commitment as well as to determine the dynamics that mediate such experiences. These experiences were examined through a 5-dimensional, 72-item Job Descriptive Index and a 3-dimensional, 12-item Organizational Commitment Questionnaire over a sample size of 108 temporary and permanent employees, drawn through random probability sampling in a number of Namibian organizations that make use of labour hire services. These experiences were further amplified by face-to-face interviews over a sub sample of 20 employees. Data analysis was carried out using the chi-square, correlation, t-tests and multiple regression techniques of the STATISTICA software. Drawing on the principles of the multi dimensional theory of organizational commitment, the Cornell dispositional theory of job satisfaction and the temporary employee stigmatization model, results revealed that variables of employment status, tenure, inadequate income, inappropriate supervision and fear of job losses ahead of a newly proposed piece of legislat st labour hire ractices significantly influenced job satisfaction and organizational commitment of employees. Estimates indicate that for a mere change in tenure, job satisfaction levels will significantly rise by 0.26 units, whereas organizational commitment will augment by 0.03 units. However, for every N$ fall in employees’ pay, we can expect job satisfaction levels to decrease by 26%, but with significant effects. The study recommends that organizations must adopt policies that grant permanent tenure to all their employees, position them in respected and challenging jobs in which they will grow skills and ensure that all employees are remunerated with pay that signals their contribution to the organizations. In doing so, the negative effects of labour broking will disappear and employees will be satisfied with their jobs and Tommitted to their organizations.
- Full Text:
- Date Issued: 2009
Land reform in South Africa: effects on land prices and productivity
- Authors: Van Rooyen, Jonathan
- Date: 2009
- Subjects: Right of property -- South Africa , Land reform -- South Africa , Agriculture and state -- South Africa , Agricultural prices -- South Africa , Land tenure -- Government policy -- South Africa , Land reform -- Economic aspects -- South Africa , Real property -- Prices -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:987 , http://hdl.handle.net/10962/d1002721
- Description: South Africa’s land redistribution policy (1994-2008) has been widely publicised, and has come under scrutiny of late from the public, private and government spheres, highlighting a need for research in this area. The research examines progress in South Africa’s land redistribution programme in two of KwaZulu-Natal’s district municipalities, Uthungulu and iLembe. Specifically the research investigates whether the government has paid above market prices when purchasing sugarcane farmland for redistribution in these districts. Moreover, it is illustrated how productivity on redistributed farms has been affected with the changes in ownership. To investigate the research questions, reviews of theories pertaining to property rights, land reform and market structures were conducted. Moreover, two cases studies were conducted in the districts of Uthungulu and iLembe, with assistance from the Department of Land Affairs, Inkezo Land Company and the South African Cane Growers Association. The case study data indicate that above ordinary market prices have been paid (2004-2006) by the government for sugarcane farmland in the districts concerned, and further that productivity has been negatively impacted ‘during’ and ‘post‘ transfer, in the majority of cases.
- Full Text:
- Date Issued: 2009
- Authors: Van Rooyen, Jonathan
- Date: 2009
- Subjects: Right of property -- South Africa , Land reform -- South Africa , Agriculture and state -- South Africa , Agricultural prices -- South Africa , Land tenure -- Government policy -- South Africa , Land reform -- Economic aspects -- South Africa , Real property -- Prices -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:987 , http://hdl.handle.net/10962/d1002721
- Description: South Africa’s land redistribution policy (1994-2008) has been widely publicised, and has come under scrutiny of late from the public, private and government spheres, highlighting a need for research in this area. The research examines progress in South Africa’s land redistribution programme in two of KwaZulu-Natal’s district municipalities, Uthungulu and iLembe. Specifically the research investigates whether the government has paid above market prices when purchasing sugarcane farmland for redistribution in these districts. Moreover, it is illustrated how productivity on redistributed farms has been affected with the changes in ownership. To investigate the research questions, reviews of theories pertaining to property rights, land reform and market structures were conducted. Moreover, two cases studies were conducted in the districts of Uthungulu and iLembe, with assistance from the Department of Land Affairs, Inkezo Land Company and the South African Cane Growers Association. The case study data indicate that above ordinary market prices have been paid (2004-2006) by the government for sugarcane farmland in the districts concerned, and further that productivity has been negatively impacted ‘during’ and ‘post‘ transfer, in the majority of cases.
- Full Text:
- Date Issued: 2009
Legal access to our musical history: an investigation into the copyright implications of archived musical recordings held at the International Library of African Music (ILAM) in South Africa
- Authors: McConnachie, Boudina
- Date: 2009
- Subjects: Tracey, Hugh International Library of African Music South Africa. Copyright Act 1978 Copyright -- Music -- South Africa Music -- History and criticism
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:2648 , http://hdl.handle.net/10962/d1002313
- Description: This thesis explores the South African Copyright Act No. 98 of 1978 as it pertains to the archived holdings at the International Library of African Music (ILAM) situated at Rhodes University, Grahamstown, South Africa. The purpose of analysing this law is to advise and assist ILAM in fulfilling royalty payment obligations as stipulated in a contract signed between ILAM and the Smithsonian Global Sound (formally Global Sound Network) in 2001. In order to clearly comprehend the scope of the royalty payment clause in the Smithsonian Institution’s contract with ILAM, this research includes an examination of: the history and nature of South African copyright as a sub-structure of intellectual property; specific internationally documented copyright infringement cases; the recording and documentation practices of Hugh Tracey (ILAM’s founder and director from 1954 to 1977); the contract between Global Sound Network and ILAM; and contentious issues surrounding collective ownership and indigenous knowledge. In conclusion, this research suggests equitable solutions to ILAM’s copyright concerns and proposes the Eastern Cape Music Archiving Project (ECMAP) as a practical vehicle to assist the South African Department of Trade and Industry in implementation of the South African Intellectual Property Amendment Bill (2008) if, and when, it is passed.
- Full Text:
- Date Issued: 2009
- Authors: McConnachie, Boudina
- Date: 2009
- Subjects: Tracey, Hugh International Library of African Music South Africa. Copyright Act 1978 Copyright -- Music -- South Africa Music -- History and criticism
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:2648 , http://hdl.handle.net/10962/d1002313
- Description: This thesis explores the South African Copyright Act No. 98 of 1978 as it pertains to the archived holdings at the International Library of African Music (ILAM) situated at Rhodes University, Grahamstown, South Africa. The purpose of analysing this law is to advise and assist ILAM in fulfilling royalty payment obligations as stipulated in a contract signed between ILAM and the Smithsonian Global Sound (formally Global Sound Network) in 2001. In order to clearly comprehend the scope of the royalty payment clause in the Smithsonian Institution’s contract with ILAM, this research includes an examination of: the history and nature of South African copyright as a sub-structure of intellectual property; specific internationally documented copyright infringement cases; the recording and documentation practices of Hugh Tracey (ILAM’s founder and director from 1954 to 1977); the contract between Global Sound Network and ILAM; and contentious issues surrounding collective ownership and indigenous knowledge. In conclusion, this research suggests equitable solutions to ILAM’s copyright concerns and proposes the Eastern Cape Music Archiving Project (ECMAP) as a practical vehicle to assist the South African Department of Trade and Industry in implementation of the South African Intellectual Property Amendment Bill (2008) if, and when, it is passed.
- Full Text:
- Date Issued: 2009
Liberalisation and regulation of trade in the Southern African Development Community (SADC) : a critical analysis of the SADC trade protocol's provisions and its implementation
- Authors: Dube, Memory
- Date: 2009
- Subjects: General Agreement on Tariffs and Trade (Organization) World Trade Organization Customs unions Foreign trade regulation Free trade -- Africa, Southern Southern African Development Community International trade
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3716 , http://hdl.handle.net/10962/d1008204
- Description: The Southern African Development Community (SADC) declared a Free Trade Area on 17 August 2008. The Free Trade Area is the ultimate objective of the Trade Protocol on trade cooperation in SADC, signed in 1996. The Protocol is supported and complemented by the ambitious Regional Indicative Strategic Development Plan (RISDP). The idea behind the SADC Trade Protocol was to counter the developmental challenges facing SADC member states and to improve the productive and trade capacity of SADC countries. The implementation of the SADC Free Trade Area has been guided by the WTO/GATT regulatory framework on regional trade agreements, particularly GATT Article XXIV, the Understanding on the Interpretation of GATT Article XXIV, as well as the Decision on Differential and More Favourable Treatment, Reciprocity and Fuller Participation of Developing Countries (Enabling Clause). This research seeks to analyse the SADC Trade Protocol's provisions and the implementation of such provisions. To facilitate an understanding of factors that affect the implementation of the SADC Trade Protocol, SADC's institutional and operational framework is discussed from a legal-historical perspective. The provisions of the Trade Protocol are analysed for compliance with WTO/GA TT rules as well as for applicability within the SADC context. The provisions of the WTO/GA TT regulatory framework on regional trade agreements are also analysed with a view to determining whether they are applicable in developing country situations such as SADC. The Free Trade Area is seen as the first step towards regional economic integration in the region and is to be followed by a Customs Union, a Common Market and then eventually an Economic Community with its own central bank and regional currency. It is envisaged that the region will proceed through all these traditional theoretical phases of economic integration between 2008 and 2018. The implementation of the Trade Protocol has been beset with institutional, administrative and infrastructural challenges which pose obstacles to the attainment of the other stages of economic integration in the time frames prescribed in the RISDP. These challenges are assessed for impact on the regional economic integration of SADC by evaluating the progress towards implementing the Trade Protocol provisions and the implementation of measures taken towards the launch of the Free Trade Area. Emerging issues are also identified and analysed for their effect on the Free Trade Area and the general economic agenda of SADC. Of particular note is the Economic Partnership Agreements (EPAs) being negotiated with the European Union where SADC countries are negotiating in four different configurations. An analysis of this EPA situation reveals that it compounds a pre-existing problem: that of overlapping membership of regional trade agreements. Prior to the EPAs and the intensified drive towards the creation of the Customs Union, there was largely no need to rationalise the overlap in regional trade agreement memberships, but it is now a matter of urgency. The overlap in membership has complicated EPA negotiations and places serious doubts on the prospects of complete regional integration in SADC.This research concludes with observations on South Africa's complicated relationship with her SADC neighbours. South Africa's trade policies, as regards both the SADC region and the world, are discussed. Because of its political and economic dominance, South Africa's policies have a ripple effect on the rest of SADC; hence the need for South Africa to be vigilant in formulating and implementing its trade policies.
- Full Text:
- Date Issued: 2009
- Authors: Dube, Memory
- Date: 2009
- Subjects: General Agreement on Tariffs and Trade (Organization) World Trade Organization Customs unions Foreign trade regulation Free trade -- Africa, Southern Southern African Development Community International trade
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:3716 , http://hdl.handle.net/10962/d1008204
- Description: The Southern African Development Community (SADC) declared a Free Trade Area on 17 August 2008. The Free Trade Area is the ultimate objective of the Trade Protocol on trade cooperation in SADC, signed in 1996. The Protocol is supported and complemented by the ambitious Regional Indicative Strategic Development Plan (RISDP). The idea behind the SADC Trade Protocol was to counter the developmental challenges facing SADC member states and to improve the productive and trade capacity of SADC countries. The implementation of the SADC Free Trade Area has been guided by the WTO/GATT regulatory framework on regional trade agreements, particularly GATT Article XXIV, the Understanding on the Interpretation of GATT Article XXIV, as well as the Decision on Differential and More Favourable Treatment, Reciprocity and Fuller Participation of Developing Countries (Enabling Clause). This research seeks to analyse the SADC Trade Protocol's provisions and the implementation of such provisions. To facilitate an understanding of factors that affect the implementation of the SADC Trade Protocol, SADC's institutional and operational framework is discussed from a legal-historical perspective. The provisions of the Trade Protocol are analysed for compliance with WTO/GA TT rules as well as for applicability within the SADC context. The provisions of the WTO/GA TT regulatory framework on regional trade agreements are also analysed with a view to determining whether they are applicable in developing country situations such as SADC. The Free Trade Area is seen as the first step towards regional economic integration in the region and is to be followed by a Customs Union, a Common Market and then eventually an Economic Community with its own central bank and regional currency. It is envisaged that the region will proceed through all these traditional theoretical phases of economic integration between 2008 and 2018. The implementation of the Trade Protocol has been beset with institutional, administrative and infrastructural challenges which pose obstacles to the attainment of the other stages of economic integration in the time frames prescribed in the RISDP. These challenges are assessed for impact on the regional economic integration of SADC by evaluating the progress towards implementing the Trade Protocol provisions and the implementation of measures taken towards the launch of the Free Trade Area. Emerging issues are also identified and analysed for their effect on the Free Trade Area and the general economic agenda of SADC. Of particular note is the Economic Partnership Agreements (EPAs) being negotiated with the European Union where SADC countries are negotiating in four different configurations. An analysis of this EPA situation reveals that it compounds a pre-existing problem: that of overlapping membership of regional trade agreements. Prior to the EPAs and the intensified drive towards the creation of the Customs Union, there was largely no need to rationalise the overlap in regional trade agreement memberships, but it is now a matter of urgency. The overlap in membership has complicated EPA negotiations and places serious doubts on the prospects of complete regional integration in SADC.This research concludes with observations on South Africa's complicated relationship with her SADC neighbours. South Africa's trade policies, as regards both the SADC region and the world, are discussed. Because of its political and economic dominance, South Africa's policies have a ripple effect on the rest of SADC; hence the need for South Africa to be vigilant in formulating and implementing its trade policies.
- Full Text:
- Date Issued: 2009
Lithostratigraphy sedimentology and provenance of the Balfour Formation Beaufort Group in the Fort Beaufort Alice area Eastern Cape Province South Africa
- Authors: Katemaunzanga, David
- Date: 2009
- Subjects: Sedimentary structures -- South Africa -- Eastern Cape , Formations (Geology) -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc (Geology)
- Identifier: vital:11521 , http://hdl.handle.net/10353/274 , Sedimentary structures -- South Africa -- Eastern Cape , Formations (Geology) -- South Africa -- Eastern Cape
- Description: A traverse through the Balfour Formation was chosen in the area around the towns of Fort Beaufort and Alice in the Eastern Cape Province. The main objectives of the study were to map the lithological variations within the Balfour Formation and to distinguish it from the underlying Middleton Formation and the overlying Katberg Formation. A combined desktop, field and laboratory approach was used in this study. Aerial photographs, satellite images and digital topographical maps formed the basis of the desktop work. After desktop mapping, a number of field traverses were measured through the study area. Sedimentary structures were observed, photomosaics were done, stratigraphic sections were measured and samples were collected for thin sectioning, heavy mineral separation and major, trace and REE analysis. Sedimentological development of the Balfour Formation has been outlined in relation to its provenance during the Late Permian. Lithological variation of the Balfour Formation is characterised by alternating sandstone-dominated and mudstone-dominated members. Arenaceous Oudeberg and Barberskrans Members are contain facies ranging from intraformational conglomerates (Gmm), massive sandstones (Sm & Ss), horizontally laminated sandstones (Sh), planar and trough cross-bedded sandstones (Sp, Sl & St), trough cross-laminated sandstones (Sr) and fine-grained sediments (Fm & Fl), whereas the mudstone dominated members are characterised by the facies Fm and Fl. Lithofacies together with bedforms observed in the Balfour Formation were used in architecturalelement analysis. Sandstone–rich members are dominated by channel fill elements such as LS, DA, SB, LA and CH, whereas the fine-grained component consists of mainly, FF iii element. The mudstone-dominated members contain FF, CS and LV elements, with LA, SB and CH in the subordinate sandstones. Petrography, geochemistry and palaeocurrent analysis indicated that the source of the Balfour Formation was to the south-east and the rocks had a transitional/dissected magmatic arc signature. This led to the postulation of the Karoo Basin to have developed in a retro-arc foreland basin where there was supralithospheric loading in the Cape Fold Belt due to a compressional regime initiated by the subduction of Palaeo-Pacific plate underneath the Gondwana plate. The tectonic loading was episodic with eight major paroxysms affecting the Karoo Supergroup. The Balfour Formation coincides with the fourth paroxysm, this paroxysm in turn consists of two third-order paroxysm that initiated the deposition of the Oudeberg and Barberskrans Members in low sinuosity streams. Each paroxysm was followed by a period of quiescence and these resulted in the deposition of the Daggaboersnek, Elandsberg and Palingkloof Members in meandering streams. Depositional environments were determined mainly from the sedimentary structures and 3D architecture of the rock types. Sandstone rich members were formed by seasonal and ephemeral high energy low sinuous streams whereas the fine-grained rich members were formed by ephemeral meandering streams. Palaeoclimates have been equated to the present temperate climates; they were semi-arid becoming arid towards the top of the Balfour Formation. This has been determined geochemistry (CIA), sedimentary structures and other rock properties like colour.
- Full Text:
- Date Issued: 2009
- Authors: Katemaunzanga, David
- Date: 2009
- Subjects: Sedimentary structures -- South Africa -- Eastern Cape , Formations (Geology) -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc (Geology)
- Identifier: vital:11521 , http://hdl.handle.net/10353/274 , Sedimentary structures -- South Africa -- Eastern Cape , Formations (Geology) -- South Africa -- Eastern Cape
- Description: A traverse through the Balfour Formation was chosen in the area around the towns of Fort Beaufort and Alice in the Eastern Cape Province. The main objectives of the study were to map the lithological variations within the Balfour Formation and to distinguish it from the underlying Middleton Formation and the overlying Katberg Formation. A combined desktop, field and laboratory approach was used in this study. Aerial photographs, satellite images and digital topographical maps formed the basis of the desktop work. After desktop mapping, a number of field traverses were measured through the study area. Sedimentary structures were observed, photomosaics were done, stratigraphic sections were measured and samples were collected for thin sectioning, heavy mineral separation and major, trace and REE analysis. Sedimentological development of the Balfour Formation has been outlined in relation to its provenance during the Late Permian. Lithological variation of the Balfour Formation is characterised by alternating sandstone-dominated and mudstone-dominated members. Arenaceous Oudeberg and Barberskrans Members are contain facies ranging from intraformational conglomerates (Gmm), massive sandstones (Sm & Ss), horizontally laminated sandstones (Sh), planar and trough cross-bedded sandstones (Sp, Sl & St), trough cross-laminated sandstones (Sr) and fine-grained sediments (Fm & Fl), whereas the mudstone dominated members are characterised by the facies Fm and Fl. Lithofacies together with bedforms observed in the Balfour Formation were used in architecturalelement analysis. Sandstone–rich members are dominated by channel fill elements such as LS, DA, SB, LA and CH, whereas the fine-grained component consists of mainly, FF iii element. The mudstone-dominated members contain FF, CS and LV elements, with LA, SB and CH in the subordinate sandstones. Petrography, geochemistry and palaeocurrent analysis indicated that the source of the Balfour Formation was to the south-east and the rocks had a transitional/dissected magmatic arc signature. This led to the postulation of the Karoo Basin to have developed in a retro-arc foreland basin where there was supralithospheric loading in the Cape Fold Belt due to a compressional regime initiated by the subduction of Palaeo-Pacific plate underneath the Gondwana plate. The tectonic loading was episodic with eight major paroxysms affecting the Karoo Supergroup. The Balfour Formation coincides with the fourth paroxysm, this paroxysm in turn consists of two third-order paroxysm that initiated the deposition of the Oudeberg and Barberskrans Members in low sinuosity streams. Each paroxysm was followed by a period of quiescence and these resulted in the deposition of the Daggaboersnek, Elandsberg and Palingkloof Members in meandering streams. Depositional environments were determined mainly from the sedimentary structures and 3D architecture of the rock types. Sandstone rich members were formed by seasonal and ephemeral high energy low sinuous streams whereas the fine-grained rich members were formed by ephemeral meandering streams. Palaeoclimates have been equated to the present temperate climates; they were semi-arid becoming arid towards the top of the Balfour Formation. This has been determined geochemistry (CIA), sedimentary structures and other rock properties like colour.
- Full Text:
- Date Issued: 2009
Macroeconomic convergence within SADC : implications for the formation of a regional monetary union
- Authors: Johns, Michael Ryan
- Date: 2009
- Subjects: Southern African Development Community , Economic and Monetary Union , Common Monetary Area (Organization) , Economic policy -- Africa, Southern , Monetary policy -- Africa, Southern , Monetary unions , Macroeconomics
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1023 , http://hdl.handle.net/10962/d1002758 , Southern African Development Community , Economic and Monetary Union , Common Monetary Area (Organization) , Economic policy -- Africa, Southern , Monetary policy -- Africa, Southern , Monetary unions , Macroeconomics
- Description: Given the growing effect that globalisation and integration has had upon economies and regions, the process of monetary union has become an increasingly topical issue in economic policy debates. This has been driven in part by the experience and successes of the European Monetary Union (EMU), which is widely perceived as beneficial to member countries. The Southern African Development Community (SADC) is an example of a group of countries that has realised that there are benefits that may arise from economic integration. This paper makes use of an interest-rate pass through model to investigate whether the pass-through of monetary policy transmission in ten SADC countries has become more similar between January 1990 and December 2007 using monthly interest rate data. This is done to determine the extent of macroeconomic convergence that prevails within SADC, and consequently establish whether the formation of a regional monetary union is feasible. The results of the empirical pass-through model were robust and show that there are certain countries that have a more efficient and similar monetary transmission process than others. In particular, the countries that form the Common Monetary Area (CMA) and the Southern African Customs Union (SACU) tend to show evidence of convergence in monetary policy transmission, especially since 2000. In addition, from analysis of the long-run pass-through, the results reveal that there is evidence that Malawi and Zambia have shown signs of convergence toward the countries that form the CMA and SACU, in terms of monetary policy transmission. The study concludes that a SADC wide monetary union is currently not feasible based on the evidence provided from the results of the pass-through analysis. Despite this, it can be tentatively suggested that the CMA may be expanded to include Botswana, Malawi and Zambia.
- Full Text:
- Date Issued: 2009
- Authors: Johns, Michael Ryan
- Date: 2009
- Subjects: Southern African Development Community , Economic and Monetary Union , Common Monetary Area (Organization) , Economic policy -- Africa, Southern , Monetary policy -- Africa, Southern , Monetary unions , Macroeconomics
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1023 , http://hdl.handle.net/10962/d1002758 , Southern African Development Community , Economic and Monetary Union , Common Monetary Area (Organization) , Economic policy -- Africa, Southern , Monetary policy -- Africa, Southern , Monetary unions , Macroeconomics
- Description: Given the growing effect that globalisation and integration has had upon economies and regions, the process of monetary union has become an increasingly topical issue in economic policy debates. This has been driven in part by the experience and successes of the European Monetary Union (EMU), which is widely perceived as beneficial to member countries. The Southern African Development Community (SADC) is an example of a group of countries that has realised that there are benefits that may arise from economic integration. This paper makes use of an interest-rate pass through model to investigate whether the pass-through of monetary policy transmission in ten SADC countries has become more similar between January 1990 and December 2007 using monthly interest rate data. This is done to determine the extent of macroeconomic convergence that prevails within SADC, and consequently establish whether the formation of a regional monetary union is feasible. The results of the empirical pass-through model were robust and show that there are certain countries that have a more efficient and similar monetary transmission process than others. In particular, the countries that form the Common Monetary Area (CMA) and the Southern African Customs Union (SACU) tend to show evidence of convergence in monetary policy transmission, especially since 2000. In addition, from analysis of the long-run pass-through, the results reveal that there is evidence that Malawi and Zambia have shown signs of convergence toward the countries that form the CMA and SACU, in terms of monetary policy transmission. The study concludes that a SADC wide monetary union is currently not feasible based on the evidence provided from the results of the pass-through analysis. Despite this, it can be tentatively suggested that the CMA may be expanded to include Botswana, Malawi and Zambia.
- Full Text:
- Date Issued: 2009
Mahatma Gandhi : a psychobiographical study
- Authors: Pillay, Koneshverrie
- Date: 2009
- Subjects: Mahatma Gandhi Institute (Mauritius) , Psychology -- Biographical methods , Psychoanalysis , Developmental psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9890 , http://hdl.handle.net/10948/1159 , Mahatma Gandhi Institute (Mauritius) , Psychology -- Biographical methods , Psychoanalysis , Developmental psychology
- Description: The study is of a psychobiographical nature, employing a psychological theory as a paradigm within which to uncover the narrative of an individual’s life. There are relatively few studies of this nature, particularly with a South African focus. The study applied a qualitative psychobiographical research method which aimed to describe Mahatma Gandhi's psychological development according to Erik Erikson’s (1950) Psychosocial Developmental Theory. Mohandas Karamchund Gandhi or Mahatma Gandhi as he was generally known was a major political and spiritual leader. Although much has been written on his life, a psychobiography has not yet been written. He was chosen as the research subject through purposive sampling on the basis of interest value, uniqueness and significance of his life. The data collection and analysis was conducted according to Yin’s (1994) ‘analytic generalization’ which incorporated Erikson’s theory of psychosocial stages. Alexander’s (1988) nine proposed guidelines assisted in the process of data analysis. The study concluded that Gandhi had attained the ego virtues of hope, will, purpose, competence, fidelity love, care and wisdom as proposed by Erikson’s (1950) Psychosocial Developmental Theory within the delineated age frame.
- Full Text:
- Date Issued: 2009
- Authors: Pillay, Koneshverrie
- Date: 2009
- Subjects: Mahatma Gandhi Institute (Mauritius) , Psychology -- Biographical methods , Psychoanalysis , Developmental psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9890 , http://hdl.handle.net/10948/1159 , Mahatma Gandhi Institute (Mauritius) , Psychology -- Biographical methods , Psychoanalysis , Developmental psychology
- Description: The study is of a psychobiographical nature, employing a psychological theory as a paradigm within which to uncover the narrative of an individual’s life. There are relatively few studies of this nature, particularly with a South African focus. The study applied a qualitative psychobiographical research method which aimed to describe Mahatma Gandhi's psychological development according to Erik Erikson’s (1950) Psychosocial Developmental Theory. Mohandas Karamchund Gandhi or Mahatma Gandhi as he was generally known was a major political and spiritual leader. Although much has been written on his life, a psychobiography has not yet been written. He was chosen as the research subject through purposive sampling on the basis of interest value, uniqueness and significance of his life. The data collection and analysis was conducted according to Yin’s (1994) ‘analytic generalization’ which incorporated Erikson’s theory of psychosocial stages. Alexander’s (1988) nine proposed guidelines assisted in the process of data analysis. The study concluded that Gandhi had attained the ego virtues of hope, will, purpose, competence, fidelity love, care and wisdom as proposed by Erikson’s (1950) Psychosocial Developmental Theory within the delineated age frame.
- Full Text:
- Date Issued: 2009
Managerial perceptions of corporate social responsibility and social practices present at McDonalds South Africa
- Authors: Böckle, Ingrid
- Date: 2009
- Subjects: Social responsibility of business -- South Africa -- Case studies , Business ethics -- South Africa -- Case studies , Management -- Moral and ethical aspects -- South Africa -- Case studies , Executives -- Professional ethics -- South Africa -- Case studies , Corporate governance -- Moral and ethical aspects -- South Africa -- Case studies , Business logistics -- Moral and ethical aspects -- South Africa -- Case studies , McDonald's Corporation
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3300 , http://hdl.handle.net/10962/d1003088
- Description: This study deals with corporate social responsibility (CSR) and focuses on managerial perceptions of CSR at McDonald’s South Africa (SA) and how social responsibility is translated into social practices. The key objectives of the research are: to analyse McDonald’s both internationally and locally in South Africa to establish whether CSR policies exist, then to investigate how these policies are perceived and integrated by outlet managers. Lastly to investigate what kind of social responsibility (SR) involvement, if at all, occurs at outlet level. The research site covers three regions in South Africa, which are the Eastern Cape, Western Cape and Gauteng. The total research sample is 38. 33 interviewees were outlet managers, who were purposively selected, and 5 additional interviews took place with: 2 McDonald’s SA Head Office representatives, 2 interviews with beneficiaries of McDonald’s SR involvement and 1 with the trade union SACCAWU. The research was carried out through questionnaires and semi-structured interviews. The design of this research is based on an interpretive social science approach. The aim of the research was to investigate outlet managers’ perceptions of CSR and social practices present at McDonald’s SA outlets. The key findings of the research indicate that: CSR policies at McDonald’s SA head office are not communicated sufficiently to outlet managers, SR involvement is evident, especially for initiatives focusing on children’s welfare, but far too little occurs at the outlet level. There are also too few checks on social involvement by head office and no formal reporting system is available to the outlets except through an internal magazine, called the Big Mag. There is no official CSR report at McDonald’s SA. The fact that no report exists makes this study more relevant since this research investigates matters pertaining to CSR and social practices. The overall significance of the study is that it brings to the forefront the importance of internal company and external broader regulation which is part of the greater debate of CSR. This is because the analysis of managerial perceptions and implementation of CSR shows some unwarranted discrepancies between policies and practices, locally, nationally and internationally even within the same organisation.
- Full Text:
- Date Issued: 2009
- Authors: Böckle, Ingrid
- Date: 2009
- Subjects: Social responsibility of business -- South Africa -- Case studies , Business ethics -- South Africa -- Case studies , Management -- Moral and ethical aspects -- South Africa -- Case studies , Executives -- Professional ethics -- South Africa -- Case studies , Corporate governance -- Moral and ethical aspects -- South Africa -- Case studies , Business logistics -- Moral and ethical aspects -- South Africa -- Case studies , McDonald's Corporation
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3300 , http://hdl.handle.net/10962/d1003088
- Description: This study deals with corporate social responsibility (CSR) and focuses on managerial perceptions of CSR at McDonald’s South Africa (SA) and how social responsibility is translated into social practices. The key objectives of the research are: to analyse McDonald’s both internationally and locally in South Africa to establish whether CSR policies exist, then to investigate how these policies are perceived and integrated by outlet managers. Lastly to investigate what kind of social responsibility (SR) involvement, if at all, occurs at outlet level. The research site covers three regions in South Africa, which are the Eastern Cape, Western Cape and Gauteng. The total research sample is 38. 33 interviewees were outlet managers, who were purposively selected, and 5 additional interviews took place with: 2 McDonald’s SA Head Office representatives, 2 interviews with beneficiaries of McDonald’s SR involvement and 1 with the trade union SACCAWU. The research was carried out through questionnaires and semi-structured interviews. The design of this research is based on an interpretive social science approach. The aim of the research was to investigate outlet managers’ perceptions of CSR and social practices present at McDonald’s SA outlets. The key findings of the research indicate that: CSR policies at McDonald’s SA head office are not communicated sufficiently to outlet managers, SR involvement is evident, especially for initiatives focusing on children’s welfare, but far too little occurs at the outlet level. There are also too few checks on social involvement by head office and no formal reporting system is available to the outlets except through an internal magazine, called the Big Mag. There is no official CSR report at McDonald’s SA. The fact that no report exists makes this study more relevant since this research investigates matters pertaining to CSR and social practices. The overall significance of the study is that it brings to the forefront the importance of internal company and external broader regulation which is part of the greater debate of CSR. This is because the analysis of managerial perceptions and implementation of CSR shows some unwarranted discrepancies between policies and practices, locally, nationally and internationally even within the same organisation.
- Full Text:
- Date Issued: 2009
Managing leader member exchange frequency effectively in a South African retail company
- Viljoen, Petrus Johannes Jacobus
- Authors: Viljoen, Petrus Johannes Jacobus
- Date: 2009
- Subjects: Communication in organizations -- South Africa , Communication in management -- South Africa , Leadership -- South Africa , Organizational behavior -- South Africa , Organizational effectiveness -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8692 , http://hdl.handle.net/10948/1106 , Communication in organizations -- South Africa , Communication in management -- South Africa , Leadership -- South Africa , Organizational behavior -- South Africa , Organizational effectiveness -- South Africa
- Description: The purpose of this research is to highlight the importance of identifying the communication frequency within the leader-member exchange (LMX) relationship, and to appreciate what the positive or negative effect of a low or high LMX frequency has on this relationship and on staff morale. Management is for the most part responsible for communication frequency and is in a position and has the means to change such frequency or to add additional communication channels. The research was based on a program introduced in a South African retail company three years ago. Data was collected from 64 stores in the Western Cape and the results were statistically analysed on the SPSS16 program. The results clearly supported the hypotheses that, in a low-communication frequency area, an increase in communication frequency has a positive effect on staff morale and that the proximity to head office (or lack of it) does not have a negative effect on staff morale.
- Full Text:
- Date Issued: 2009
- Authors: Viljoen, Petrus Johannes Jacobus
- Date: 2009
- Subjects: Communication in organizations -- South Africa , Communication in management -- South Africa , Leadership -- South Africa , Organizational behavior -- South Africa , Organizational effectiveness -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8692 , http://hdl.handle.net/10948/1106 , Communication in organizations -- South Africa , Communication in management -- South Africa , Leadership -- South Africa , Organizational behavior -- South Africa , Organizational effectiveness -- South Africa
- Description: The purpose of this research is to highlight the importance of identifying the communication frequency within the leader-member exchange (LMX) relationship, and to appreciate what the positive or negative effect of a low or high LMX frequency has on this relationship and on staff morale. Management is for the most part responsible for communication frequency and is in a position and has the means to change such frequency or to add additional communication channels. The research was based on a program introduced in a South African retail company three years ago. Data was collected from 64 stores in the Western Cape and the results were statistically analysed on the SPSS16 program. The results clearly supported the hypotheses that, in a low-communication frequency area, an increase in communication frequency has a positive effect on staff morale and that the proximity to head office (or lack of it) does not have a negative effect on staff morale.
- Full Text:
- Date Issued: 2009
Mariculture as a means to add value to the east coast rock lobster Panulirus homarus rubellus subsistence fishery : a physiological approach to define transport and growout protocols for wild caught juveniles
- Authors: Kemp, J O G
- Date: 2009
- Subjects: Lobster fisheries -- South Africa , Lobster culture -- South Africa , Lobsters -- Growth -- South Africa , Mariculture -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5299 , http://hdl.handle.net/10962/d1005144
- Description: In a context of declining capture fisheries and public pressure for greater access to marine resources, marine aquaculture is receiving increasing interest from the South African government as a means to increase the diversity of economic activities in coastal regions, thereby providing employment and reducing poverty. The east coast rock lobster Panulirus homarus rubellus is currently harvested by subsistence fisherman along the former Transkei coastline of south-east South Africa and presents a possible opportunity for ongrowing wild juvenile lobsters in culture facilities. Lack of compliance coupled with poor enforcement of the minimum size limit (65 mm carapace length) has resulted in the ongoing harvest of undersize size lobsters by subsistence fishers. Generally, fishers either consume these undersize lobsters or sell them to tourists for low prices. In line with international trends in rock lobster aquaculture, interest has subsequently arisen in the possibilities of ongrowing these undersize lobsters as a means of adding value to the P. h rubellus resource for subsistence fishers. The aim of this physiological study was to assess the biological feasibility of harvesting, transporting and culturing wild caught juvenile lobsters, thereby provide empirical data to inform the development of suitable transport and culture protocols. The experimental objectives were to asses the effect of temperature on growth and survival of P. h. rubellus, as well as the effects of a suite of extrinsic and intrinsic factors on ammonia excretion and oxygen consumption. Juvenile lobsters were collected by hand from near-shore reefs (2-15 m depth) off Mdumbi in the former Transkei, Eastern Cape Province and transported by road (7 hours) to the Port Alfred Marine Research Laboratory where they were held in a recirculating culture system. The effect of temperature over a range of 9.7 °C (18.9±0.7 to 28.6±1.5 °C) on the growth and survival of juvenile P. h. rubellus fed a diet of fresh mussel flesh was investigated. Specific growth rate (SGR) was significantly different between temperatures (p = 0.01), with the highest values recorded for the 24 °C and 28 °C treatments. There was no significant difference in moult increment (MI) between temperatures, however, intermoult period (IMP) differed significantly between temperatures (p = 0.0015) with mean IMP lowest at 24 °C, although not significantly different from the means of the 26 °C and 28 °C treatments. IMP was highest at 19 °C and 21 °C. Apparent feed intake was significantly different between treatments (p < 0.0001) and exhibited a strong positive correlation with increasing temperature. Food conversion ratio (FCR) differed significantly between temperatures (p = 0.02) with 24 °C exhibiting the most efficient FCR. The results for growth rate and food conversion efficiency suggested that 24 °C is optimal for the growout of juvenile P. h. rubellus. In the second study, the effect of body weight, emersion, daily rhythm, feeding and ambient ammonia on the total ammonia nitrogen (TAN) excretion rate was investigated. Body weight (n = 16, range of 16.8 – 322 g) was positively correlated to daytime TAN excretion rate (mg h⁻¹). Re-immersion after one hour emersion in a moist environment was characterized by a significant increase in TAN excretion rate for the first hour compared to pre-immersion levels. The amount of TAN excreted during this period was as expected if basal TAN excretion rates were maintained during emersion. TAN excretion rates returned to pre-emersion levels by the end of the second hour. There was no evidence of a daily rhythm in TAN excretion rate for P. h. rubellus. TAN excretion rates were elevated following feeding. An initial peak in TAN excretion rate after seven hours (7.58 times pre-feeding rate) was followed by a smaller peak after 13 hours (6.69 times pre-feeding rate). TAN excretion rate dropped to levels not significantly different from pre-feeding levels after 23 hours and consistently returned to pre-feeding levels after 42 hours. The TAN excretion rates of lobster exposed for two hours to an ambient TAN concentration of 1.02±0.10 mg l⁻¹ and 2.3± 0.2 mg l⁻¹ were not significantly different from TAN excretion rates recorded at low ambient water TAN prior to exposure. Exposure to an ambient TAN concentration of 4.45±0.78 mg l⁻¹ had a significant effect on the TAN excretion rate, with pronounced ammonia uptake occurring for all animals at this concentration. The third study investigated the effects of body weight, diurnal rhythm, feeding and emersion on lobster oxygen consumption. Body weight was positively correlated to both standard and active oxygen consumption (mg O2 h⁻¹) while body weight was negatively correlated to mass-specific standard oxygen uptake (mg O2 g⁻¹ h⁻¹). Diurnal rhythm exhibited a strong effect on the lobsters oxygen consumption, with average night time values 67% greater than those recorded during the day. This was related to activity driven by intrinsic nocturnal foraging behaviour. Feeding resulted in a classic specific dynamic action (SDA) response, with postprandial oxygen consumption increasing to a peak before decreasing gradually to preprandial levels. Emersion resulted in a significant increase in oxygen consumption, with lobsters rapidly recovering to pre-emersion levels after four hours. Results from these studies suggest that the capture, transport and culture of juvenile P. h. rubellus is biologically feasible. Empirical data generated were used to provide recommendations regarding species optimised transport and culture protocols. A purge time of 48 hours before transport is suggested to ensure that ammonia excretion and oxygen consumption are at basal levels. Furthermore, emersed transport for a period of one hour is characterised by rapid recovery upon re-immersion. In order to prevent the accumulation of stressors, it is suggested that consecutive periods of emersion are interjected with recovery periods (five hours) in water to allow the removal of accumulated ammonia and repayment of the oxygen debt incurred. The recorded ammonia rates indicate that a biological filter size of 4.8 m³ is recommended for 1000 kg of fed lobsters in a culture situation, although this can be reduced considerably if lobsters are being held without feeding (0.72 m³). A flow rate of 112 l kg⁻¹ h⁻¹ is required to meet the metabolic requirements of lobsters. Bottlenecks to the viable commercial culture of P. h. rubellus, and the ability of this practice to provide the socio-economic benefits that were envisioned, are discussed.
- Full Text:
- Date Issued: 2009
- Authors: Kemp, J O G
- Date: 2009
- Subjects: Lobster fisheries -- South Africa , Lobster culture -- South Africa , Lobsters -- Growth -- South Africa , Mariculture -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5299 , http://hdl.handle.net/10962/d1005144
- Description: In a context of declining capture fisheries and public pressure for greater access to marine resources, marine aquaculture is receiving increasing interest from the South African government as a means to increase the diversity of economic activities in coastal regions, thereby providing employment and reducing poverty. The east coast rock lobster Panulirus homarus rubellus is currently harvested by subsistence fisherman along the former Transkei coastline of south-east South Africa and presents a possible opportunity for ongrowing wild juvenile lobsters in culture facilities. Lack of compliance coupled with poor enforcement of the minimum size limit (65 mm carapace length) has resulted in the ongoing harvest of undersize size lobsters by subsistence fishers. Generally, fishers either consume these undersize lobsters or sell them to tourists for low prices. In line with international trends in rock lobster aquaculture, interest has subsequently arisen in the possibilities of ongrowing these undersize lobsters as a means of adding value to the P. h rubellus resource for subsistence fishers. The aim of this physiological study was to assess the biological feasibility of harvesting, transporting and culturing wild caught juvenile lobsters, thereby provide empirical data to inform the development of suitable transport and culture protocols. The experimental objectives were to asses the effect of temperature on growth and survival of P. h. rubellus, as well as the effects of a suite of extrinsic and intrinsic factors on ammonia excretion and oxygen consumption. Juvenile lobsters were collected by hand from near-shore reefs (2-15 m depth) off Mdumbi in the former Transkei, Eastern Cape Province and transported by road (7 hours) to the Port Alfred Marine Research Laboratory where they were held in a recirculating culture system. The effect of temperature over a range of 9.7 °C (18.9±0.7 to 28.6±1.5 °C) on the growth and survival of juvenile P. h. rubellus fed a diet of fresh mussel flesh was investigated. Specific growth rate (SGR) was significantly different between temperatures (p = 0.01), with the highest values recorded for the 24 °C and 28 °C treatments. There was no significant difference in moult increment (MI) between temperatures, however, intermoult period (IMP) differed significantly between temperatures (p = 0.0015) with mean IMP lowest at 24 °C, although not significantly different from the means of the 26 °C and 28 °C treatments. IMP was highest at 19 °C and 21 °C. Apparent feed intake was significantly different between treatments (p < 0.0001) and exhibited a strong positive correlation with increasing temperature. Food conversion ratio (FCR) differed significantly between temperatures (p = 0.02) with 24 °C exhibiting the most efficient FCR. The results for growth rate and food conversion efficiency suggested that 24 °C is optimal for the growout of juvenile P. h. rubellus. In the second study, the effect of body weight, emersion, daily rhythm, feeding and ambient ammonia on the total ammonia nitrogen (TAN) excretion rate was investigated. Body weight (n = 16, range of 16.8 – 322 g) was positively correlated to daytime TAN excretion rate (mg h⁻¹). Re-immersion after one hour emersion in a moist environment was characterized by a significant increase in TAN excretion rate for the first hour compared to pre-immersion levels. The amount of TAN excreted during this period was as expected if basal TAN excretion rates were maintained during emersion. TAN excretion rates returned to pre-emersion levels by the end of the second hour. There was no evidence of a daily rhythm in TAN excretion rate for P. h. rubellus. TAN excretion rates were elevated following feeding. An initial peak in TAN excretion rate after seven hours (7.58 times pre-feeding rate) was followed by a smaller peak after 13 hours (6.69 times pre-feeding rate). TAN excretion rate dropped to levels not significantly different from pre-feeding levels after 23 hours and consistently returned to pre-feeding levels after 42 hours. The TAN excretion rates of lobster exposed for two hours to an ambient TAN concentration of 1.02±0.10 mg l⁻¹ and 2.3± 0.2 mg l⁻¹ were not significantly different from TAN excretion rates recorded at low ambient water TAN prior to exposure. Exposure to an ambient TAN concentration of 4.45±0.78 mg l⁻¹ had a significant effect on the TAN excretion rate, with pronounced ammonia uptake occurring for all animals at this concentration. The third study investigated the effects of body weight, diurnal rhythm, feeding and emersion on lobster oxygen consumption. Body weight was positively correlated to both standard and active oxygen consumption (mg O2 h⁻¹) while body weight was negatively correlated to mass-specific standard oxygen uptake (mg O2 g⁻¹ h⁻¹). Diurnal rhythm exhibited a strong effect on the lobsters oxygen consumption, with average night time values 67% greater than those recorded during the day. This was related to activity driven by intrinsic nocturnal foraging behaviour. Feeding resulted in a classic specific dynamic action (SDA) response, with postprandial oxygen consumption increasing to a peak before decreasing gradually to preprandial levels. Emersion resulted in a significant increase in oxygen consumption, with lobsters rapidly recovering to pre-emersion levels after four hours. Results from these studies suggest that the capture, transport and culture of juvenile P. h. rubellus is biologically feasible. Empirical data generated were used to provide recommendations regarding species optimised transport and culture protocols. A purge time of 48 hours before transport is suggested to ensure that ammonia excretion and oxygen consumption are at basal levels. Furthermore, emersed transport for a period of one hour is characterised by rapid recovery upon re-immersion. In order to prevent the accumulation of stressors, it is suggested that consecutive periods of emersion are interjected with recovery periods (five hours) in water to allow the removal of accumulated ammonia and repayment of the oxygen debt incurred. The recorded ammonia rates indicate that a biological filter size of 4.8 m³ is recommended for 1000 kg of fed lobsters in a culture situation, although this can be reduced considerably if lobsters are being held without feeding (0.72 m³). A flow rate of 112 l kg⁻¹ h⁻¹ is required to meet the metabolic requirements of lobsters. Bottlenecks to the viable commercial culture of P. h. rubellus, and the ability of this practice to provide the socio-economic benefits that were envisioned, are discussed.
- Full Text:
- Date Issued: 2009
Mentoring as a strategy to develop leadership potential of female employees
- Authors: Potgieter, Deidre
- Date: 2009
- Subjects: Mentoring in business , Leadership in women , Women employees
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9278 , http://hdl.handle.net/10948/1472 , Mentoring in business , Leadership in women , Women employees
- Description: Institutions of higher learning should be doing leadership development of females to enhance the gender balance. The number of females employed in South African higher education is almost equal to the number of males, yet the highest proportions of females continue to hold the lowest academic and support positions. To compound the problem, after attracting suitable female staff, institutions do not have programmes to encourage them to remain within the system. Females need to surmount extra hurdles to be considered as leaders, and have different experiences of organisations from those of their male peers. Research suggests that women have the qualifications, skills and experiences required for leadership. This study aimed to look at mentoring as a strategy to enhance female leadership development. A literature review was conducted to understand the term mentoring and all related aspects. The aspects included the functions and phases of mentoring, as well as the process of a mentoring programme. Recently organisations have begun to realise how important mentoring can be to their success. Research has shown that mentoring facilitates leadership development through the career and psycho-social functions that the relationship provides. The study also investigated gender and leadership, and highlighted the barriers faced by women. The empirical part of this study was to determine employees‘ perceptions of mentoring. It was conducted in a Higher Education Institution. Random sampling was used to select respondents. The sample size consisted of 110 respondents. A structured pre-coded questionnaire was used to collect the data. The data was analysed Abstract Page iii using the relevant statistical package. Independent t-tests and analysis of variance techniques were used to determine statistically significant differences in perceptions between groups according to race, qualifications, period of employment and the type of appointment (academic/administrative). Statistically significant differences were found between race groups and the period of employment. Qualification and type of appointment did not significantly affect employees‘ responses. The major findings indicate a general congruence towards mentoring as a suitable strategy to enhance female leadership development. Institutional barriers were identified and the organisation needs to acknowledge and understand the organisational culture before embarking on this process. The theoretical and practical implications of the findings are discussed and recommendations based on these findings are provided.
- Full Text:
- Date Issued: 2009
- Authors: Potgieter, Deidre
- Date: 2009
- Subjects: Mentoring in business , Leadership in women , Women employees
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9278 , http://hdl.handle.net/10948/1472 , Mentoring in business , Leadership in women , Women employees
- Description: Institutions of higher learning should be doing leadership development of females to enhance the gender balance. The number of females employed in South African higher education is almost equal to the number of males, yet the highest proportions of females continue to hold the lowest academic and support positions. To compound the problem, after attracting suitable female staff, institutions do not have programmes to encourage them to remain within the system. Females need to surmount extra hurdles to be considered as leaders, and have different experiences of organisations from those of their male peers. Research suggests that women have the qualifications, skills and experiences required for leadership. This study aimed to look at mentoring as a strategy to enhance female leadership development. A literature review was conducted to understand the term mentoring and all related aspects. The aspects included the functions and phases of mentoring, as well as the process of a mentoring programme. Recently organisations have begun to realise how important mentoring can be to their success. Research has shown that mentoring facilitates leadership development through the career and psycho-social functions that the relationship provides. The study also investigated gender and leadership, and highlighted the barriers faced by women. The empirical part of this study was to determine employees‘ perceptions of mentoring. It was conducted in a Higher Education Institution. Random sampling was used to select respondents. The sample size consisted of 110 respondents. A structured pre-coded questionnaire was used to collect the data. The data was analysed Abstract Page iii using the relevant statistical package. Independent t-tests and analysis of variance techniques were used to determine statistically significant differences in perceptions between groups according to race, qualifications, period of employment and the type of appointment (academic/administrative). Statistically significant differences were found between race groups and the period of employment. Qualification and type of appointment did not significantly affect employees‘ responses. The major findings indicate a general congruence towards mentoring as a suitable strategy to enhance female leadership development. Institutional barriers were identified and the organisation needs to acknowledge and understand the organisational culture before embarking on this process. The theoretical and practical implications of the findings are discussed and recommendations based on these findings are provided.
- Full Text:
- Date Issued: 2009
Modelling and intelligent control of vehicle climatronic systems
- Sun, Jie
- Authors: Sun, Jie
- Date: 2009
- Subjects: Automobiles -- Air conditioning , Automobiles -- Motors -- Cooling systems , Automobiles -- Heating and ventilation
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9600 , http://hdl.handle.net/10948/1118 , Automobiles -- Air conditioning , Automobiles -- Motors -- Cooling systems , Automobiles -- Heating and ventilation
- Description: The modelling and control method of a vehicle climatronic system, based on MATLAB/SIMULINK, is presented. In order to achieve high modelling accuracy, a developed simulation model library is introduced. The modelling approach is described and the developed models are validated with some of experimental data obtained. The models are nonlinear, independent of fluid type and based on thermo-dynamic principles. Analysis of the cooling circuit modelling and empirical real-time control models are created by using Fuzzy logic controller and Stateflow. Both of control input and output are implemented essentially at original vehicle CAN-Bus system. Feasible digital automatic control strategy basic to fuzzy theory, hardware and software solution are given. The simulation experiment is achieved with the Hardware-in-Loop technology. This control methodology is easily operated and worth applying for any further studies or methods.
- Full Text:
- Date Issued: 2009
- Authors: Sun, Jie
- Date: 2009
- Subjects: Automobiles -- Air conditioning , Automobiles -- Motors -- Cooling systems , Automobiles -- Heating and ventilation
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9600 , http://hdl.handle.net/10948/1118 , Automobiles -- Air conditioning , Automobiles -- Motors -- Cooling systems , Automobiles -- Heating and ventilation
- Description: The modelling and control method of a vehicle climatronic system, based on MATLAB/SIMULINK, is presented. In order to achieve high modelling accuracy, a developed simulation model library is introduced. The modelling approach is described and the developed models are validated with some of experimental data obtained. The models are nonlinear, independent of fluid type and based on thermo-dynamic principles. Analysis of the cooling circuit modelling and empirical real-time control models are created by using Fuzzy logic controller and Stateflow. Both of control input and output are implemented essentially at original vehicle CAN-Bus system. Feasible digital automatic control strategy basic to fuzzy theory, hardware and software solution are given. The simulation experiment is achieved with the Hardware-in-Loop technology. This control methodology is easily operated and worth applying for any further studies or methods.
- Full Text:
- Date Issued: 2009
Modelling of size-based portfolios using a mixture of normal distributions
- Authors: Janse Van Rensburg, Stéfan
- Date: 2009
- Subjects: Capital assets pricing model
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:10569 , http://hdl.handle.net/10948/985 , Capital assets pricing model
- Description: From option pricing using the Black and Scholes model, to determining the signi cance of regression coe cients in a capital asset pricing model (CAPM), the assumption of normality was pervasive throughout the eld of nance. This was despite evidence that nancial returns were non-normal, skewed and heavy- tailed. In addition to non-normality, there remained questions about the e ect of rm size on returns. Studies examining these di erences were limited to ex- amining the mean return, with respect to an asset pricing model, and did not consider higher moments. Janse van Rensburg, Sharp and Friskin (in press) attempted to address both the problem of non-normality and size simultaneously. They (Janse van Rens- burg et al in press) tted a mixture of two normal distributions, with common mean but di erent variances, to a small capitalisation portfolio and a large cap- italisation portfolio. Comparison of the mixture distributions yielded valuable insight into the di erences between the small and large capitalisation portfolios' risk. Janse van Rensburg et al (in press), however, identi ed several shortcom- ings within their work. These included data problems, such as survivorship bias and the exclusion of dividends, and the questionable use of standard statistical tests in the presence of non-normality. This study sought to correct the problems noted in the paper by Janse van Rensburg et al (in press) and to expand upon their research. To this end survivorship bias was eliminated and an e ective dividend was included into the return calculations. Weekly data were used, rather than the monthly data of Janse van Rensburg et al (in press). More portfolios, over shorter holding periods, were considered. This allowed the authors to test whether Janse van Rensburg et al's (in press) ndings remained valid under conditions di erent to their original study. Inference was also based on bootstrapped statistics, in order to circumvent problems associated with non-normality. Additionally, several di erent speci cations of the normal mixture distribution were considered, as opposed to only the two-component scale mixture. In the following, Chapter 2 provided a literature review of previous studies on return distributions and size e ects. The data, data preparation and portfolio formation were discussed in Chapter 3. Chapter 4 gave an overview of the statistical methods and tests used throughout the study. The empirical results of these tests, prior to risk adjustment, were presented in Chapter 5. The impact of risk adjustment on the distribution of returns was documented in Chapter 6. The study ended, Chapter 7, with a summary of the results and suggestions for future research.
- Full Text:
- Date Issued: 2009
- Authors: Janse Van Rensburg, Stéfan
- Date: 2009
- Subjects: Capital assets pricing model
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:10569 , http://hdl.handle.net/10948/985 , Capital assets pricing model
- Description: From option pricing using the Black and Scholes model, to determining the signi cance of regression coe cients in a capital asset pricing model (CAPM), the assumption of normality was pervasive throughout the eld of nance. This was despite evidence that nancial returns were non-normal, skewed and heavy- tailed. In addition to non-normality, there remained questions about the e ect of rm size on returns. Studies examining these di erences were limited to ex- amining the mean return, with respect to an asset pricing model, and did not consider higher moments. Janse van Rensburg, Sharp and Friskin (in press) attempted to address both the problem of non-normality and size simultaneously. They (Janse van Rens- burg et al in press) tted a mixture of two normal distributions, with common mean but di erent variances, to a small capitalisation portfolio and a large cap- italisation portfolio. Comparison of the mixture distributions yielded valuable insight into the di erences between the small and large capitalisation portfolios' risk. Janse van Rensburg et al (in press), however, identi ed several shortcom- ings within their work. These included data problems, such as survivorship bias and the exclusion of dividends, and the questionable use of standard statistical tests in the presence of non-normality. This study sought to correct the problems noted in the paper by Janse van Rensburg et al (in press) and to expand upon their research. To this end survivorship bias was eliminated and an e ective dividend was included into the return calculations. Weekly data were used, rather than the monthly data of Janse van Rensburg et al (in press). More portfolios, over shorter holding periods, were considered. This allowed the authors to test whether Janse van Rensburg et al's (in press) ndings remained valid under conditions di erent to their original study. Inference was also based on bootstrapped statistics, in order to circumvent problems associated with non-normality. Additionally, several di erent speci cations of the normal mixture distribution were considered, as opposed to only the two-component scale mixture. In the following, Chapter 2 provided a literature review of previous studies on return distributions and size e ects. The data, data preparation and portfolio formation were discussed in Chapter 3. Chapter 4 gave an overview of the statistical methods and tests used throughout the study. The empirical results of these tests, prior to risk adjustment, were presented in Chapter 5. The impact of risk adjustment on the distribution of returns was documented in Chapter 6. The study ended, Chapter 7, with a summary of the results and suggestions for future research.
- Full Text:
- Date Issued: 2009
Molecular and biochemical analysis of the diet of the black rhinoceros
- Authors: Kgopa, Ananias Hodi
- Date: 2009 , 2013-07-15
- Subjects: Black rhinoceros -- South Africa -- Eastern Cape , Browse (Animal food) -- South Africa -- Eastern Cape -- Analysis , Black rhinoceros -- Manure -- Analysis , Phenols , Antioxidants , Plant ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4064 , http://hdl.handle.net/10962/d1004721 , Black rhinoceros -- South Africa -- Eastern Cape , Browse (Animal food) -- South Africa -- Eastern Cape -- Analysis , Black rhinoceros -- Manure -- Analysis , Phenols , Antioxidants , Plant ecology -- South Africa -- Eastern Cape
- Description: The black rhinoceros, Diceros bicornis, is listed as critically endangered. The black rhinoceros population in the Great Fish River Reserve (GFRR) has increased steadily to a current estimate of one hundred animals since the re-introduction of four animals in 1986. In an effort to contribute to the effective conservation and management of this species, dietary composition was studied in the medium Portulcaria thicket vegetation of the GFRR. This study used a molecular approach to determine the diet of the black rhinoceros of the GFRR by sequencing the ribulose bisphosphate carboxylase large subunit (rbcL) gene in plants and dung. Twenty-three plant species were collected from the reserve, and 802 bp of the rbcL gene were sequenced. These plant sequences were used as a reference database for the identification of plant sequences generated from black rhinoceros dung. Initial studies investigated the amplification, cloning and sequencing of DNA extracted from the dung samples which indicated the viability of the molecular approach. Thereafter, dung generated rbcL DNA was analyzed by GS FLX sequencing. Of the plant sequences identified by comparison to the GenBank database, Carissa bispinosa was the most prevalent. The study further characterized the antioxidant activities and phenolic content of plants eaten by the black rhinoceros using four different assays. Phyllanthus verrucosus, Putterlickia pyracantha, Maytenus capitata, Euclea undulata and Ozoroa mucrunata consistently had high antioxidant activities when assayed against 2,2-azinobis (3-ethyl benzothiazolium-6-sulfonic acid) (ABTSʹ⁺), 2,2-diphenyl-1-picrylhydrazyl (DPPHʹ), and ferric reducing antioxidant potentials (FRAP) and phenolic content when evaluated using the Folin-Ciocalteu assay. The majority of plants investigated showed low antioxidant potentials and low phenolic content. The extent to which antioxidants influenced the browse selection by the black rhinoceros remains inconclusive.
- Full Text:
- Date Issued: 2009
- Authors: Kgopa, Ananias Hodi
- Date: 2009 , 2013-07-15
- Subjects: Black rhinoceros -- South Africa -- Eastern Cape , Browse (Animal food) -- South Africa -- Eastern Cape -- Analysis , Black rhinoceros -- Manure -- Analysis , Phenols , Antioxidants , Plant ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4064 , http://hdl.handle.net/10962/d1004721 , Black rhinoceros -- South Africa -- Eastern Cape , Browse (Animal food) -- South Africa -- Eastern Cape -- Analysis , Black rhinoceros -- Manure -- Analysis , Phenols , Antioxidants , Plant ecology -- South Africa -- Eastern Cape
- Description: The black rhinoceros, Diceros bicornis, is listed as critically endangered. The black rhinoceros population in the Great Fish River Reserve (GFRR) has increased steadily to a current estimate of one hundred animals since the re-introduction of four animals in 1986. In an effort to contribute to the effective conservation and management of this species, dietary composition was studied in the medium Portulcaria thicket vegetation of the GFRR. This study used a molecular approach to determine the diet of the black rhinoceros of the GFRR by sequencing the ribulose bisphosphate carboxylase large subunit (rbcL) gene in plants and dung. Twenty-three plant species were collected from the reserve, and 802 bp of the rbcL gene were sequenced. These plant sequences were used as a reference database for the identification of plant sequences generated from black rhinoceros dung. Initial studies investigated the amplification, cloning and sequencing of DNA extracted from the dung samples which indicated the viability of the molecular approach. Thereafter, dung generated rbcL DNA was analyzed by GS FLX sequencing. Of the plant sequences identified by comparison to the GenBank database, Carissa bispinosa was the most prevalent. The study further characterized the antioxidant activities and phenolic content of plants eaten by the black rhinoceros using four different assays. Phyllanthus verrucosus, Putterlickia pyracantha, Maytenus capitata, Euclea undulata and Ozoroa mucrunata consistently had high antioxidant activities when assayed against 2,2-azinobis (3-ethyl benzothiazolium-6-sulfonic acid) (ABTSʹ⁺), 2,2-diphenyl-1-picrylhydrazyl (DPPHʹ), and ferric reducing antioxidant potentials (FRAP) and phenolic content when evaluated using the Folin-Ciocalteu assay. The majority of plants investigated showed low antioxidant potentials and low phenolic content. The extent to which antioxidants influenced the browse selection by the black rhinoceros remains inconclusive.
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- Date Issued: 2009