Development of an antiretroviral solid dosage form using multivariate analysis
- Authors: Nqabeni, Luxolo
- Date: 2007
- Subjects: Analysis of variance , Experimental design , Multivariate analysis , Antiretroviral agents -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10145 , http://hdl.handle.net/10948/705 , Analysis of variance , Experimental design , Multivariate analysis , Antiretroviral agents -- South Africa
- Description: The aim of pharmaceutical development is to design a quality product and the manufacturing process to deliver the product in a reproducible manner. The development of a new and generic formulation is based on a large number of experiments. Statistics provides many tools for studying the conditions of formulations and processes and enables us to optimize the same while being able to minimize our experimentation. The purpose of this study was to apply experimental design methodology (DOE) and multivariate analysis to the development and optimization of tablet formulations containing 150 mg lamivudine manufactured by direct compression.
- Full Text:
- Date Issued: 2007
- Authors: Nqabeni, Luxolo
- Date: 2007
- Subjects: Analysis of variance , Experimental design , Multivariate analysis , Antiretroviral agents -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10145 , http://hdl.handle.net/10948/705 , Analysis of variance , Experimental design , Multivariate analysis , Antiretroviral agents -- South Africa
- Description: The aim of pharmaceutical development is to design a quality product and the manufacturing process to deliver the product in a reproducible manner. The development of a new and generic formulation is based on a large number of experiments. Statistics provides many tools for studying the conditions of formulations and processes and enables us to optimize the same while being able to minimize our experimentation. The purpose of this study was to apply experimental design methodology (DOE) and multivariate analysis to the development and optimization of tablet formulations containing 150 mg lamivudine manufactured by direct compression.
- Full Text:
- Date Issued: 2007
Education decentralization in the Omaheke Region of Namibia
- Authors: Semba, Pecka
- Date: 2007
- Subjects: Education -- Namibia Schools -- Decentralization -- Namibia Education and state -- Namibia Educational change -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1894 , http://hdl.handle.net/10962/d1006114
- Description: Before the attainment of independence on 21 March 1990, the people of Namibia were engaged in a protracted struggle against colonialism, racism and apartheid, all of which had denied the majority of the people democracy and development. The people of Namibia therefore did not have power to make decisions on matters that affect their lives and were also not able to determine their own destiny (Ministry of Regional Government and Housing [MoRGH]: 1998:1). After independence, the Namibian government provided for a policy of decentralization under Chapter 12 of the Constitution. After adopting decentralization as state policy in 1996 the government, under the auspices of the Ministry of Regional, Local Government and Housing, embarked upon an implementation process that began in 2003. Education decentralization was included in this process. As my research investigated participants' experience of education decentralization in the Omaheke Region, I conducted an interpretive case study. I employed semi-structured interviews as my main data collection instrument. The quality of my research lies mostly in the authenticity of my thick descriptions where I rely to a large degree on a high ratio of participant to researcher voice. The study has revealed that there is a basic understanding of what education decentralization refers to. Education decentralization is also perceived to provide for the democratization of education through the active participation of all relevant stakeholders - parents, teachers, learners and civil servants - in the education process. However, although there is a basic understanding of what education decentralization entails, there is not necessarily acceptance. The study revealed that many people in Omaheke have reservations about the process of decentralizing education services. Some regard education decentralization as central government "dumping" its responsibility on the Regions. Furthermore, neither the Regional Council, the Regional Education Office, schools, communities nor parents have the capacity to cope with decentralization. The responsibility for overseeing the implementation of decentralization in the Region lies with the Omaheke Regional Council. Education as a decentralized function ought to resort directly under the Regional Council. However, the Regional Education office does not yet operate under the Regional Council. Instead the Education Director continues to report directly to the Permanent Secretary of the Ministry of Education in the capital. In this way an important decentralization structure, the Regional Council, is bypassed and rendered toothless. The data reveal that there is only partial evidence of psychological and structural readiness for education decentralization. Consequently there is little meaningful participation and therefore no sense of ownership among parents, teachers, learners, community-based organizations and political leaders.
- Full Text:
- Date Issued: 2007
- Authors: Semba, Pecka
- Date: 2007
- Subjects: Education -- Namibia Schools -- Decentralization -- Namibia Education and state -- Namibia Educational change -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1894 , http://hdl.handle.net/10962/d1006114
- Description: Before the attainment of independence on 21 March 1990, the people of Namibia were engaged in a protracted struggle against colonialism, racism and apartheid, all of which had denied the majority of the people democracy and development. The people of Namibia therefore did not have power to make decisions on matters that affect their lives and were also not able to determine their own destiny (Ministry of Regional Government and Housing [MoRGH]: 1998:1). After independence, the Namibian government provided for a policy of decentralization under Chapter 12 of the Constitution. After adopting decentralization as state policy in 1996 the government, under the auspices of the Ministry of Regional, Local Government and Housing, embarked upon an implementation process that began in 2003. Education decentralization was included in this process. As my research investigated participants' experience of education decentralization in the Omaheke Region, I conducted an interpretive case study. I employed semi-structured interviews as my main data collection instrument. The quality of my research lies mostly in the authenticity of my thick descriptions where I rely to a large degree on a high ratio of participant to researcher voice. The study has revealed that there is a basic understanding of what education decentralization refers to. Education decentralization is also perceived to provide for the democratization of education through the active participation of all relevant stakeholders - parents, teachers, learners and civil servants - in the education process. However, although there is a basic understanding of what education decentralization entails, there is not necessarily acceptance. The study revealed that many people in Omaheke have reservations about the process of decentralizing education services. Some regard education decentralization as central government "dumping" its responsibility on the Regions. Furthermore, neither the Regional Council, the Regional Education Office, schools, communities nor parents have the capacity to cope with decentralization. The responsibility for overseeing the implementation of decentralization in the Region lies with the Omaheke Regional Council. Education as a decentralized function ought to resort directly under the Regional Council. However, the Regional Education office does not yet operate under the Regional Council. Instead the Education Director continues to report directly to the Permanent Secretary of the Ministry of Education in the capital. In this way an important decentralization structure, the Regional Council, is bypassed and rendered toothless. The data reveal that there is only partial evidence of psychological and structural readiness for education decentralization. Consequently there is little meaningful participation and therefore no sense of ownership among parents, teachers, learners, community-based organizations and political leaders.
- Full Text:
- Date Issued: 2007
Effectiveness of the basic antenatal care package in primary health care clinics
- Authors: Snyman, J S
- Date: 2007
- Subjects: Pregnant women -- Health and hygiene , Hospitals -- Maternity services -- South Africa -- Port Elizabeth -- Evaluation , Maternal health services
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10037 , http://hdl.handle.net/10948/728 , Pregnant women -- Health and hygiene , Hospitals -- Maternity services -- South Africa -- Port Elizabeth -- Evaluation , Maternal health services
- Description: Pregnancy challenges the health care system in a unique way in that it involves at least two individuals – the woman and the fetus. The death rates of both pregnant women (maternal mortality) and newborns (perinatal mortality) are often used to indicate the quality of care the health system is providing. In terms of maternal and perinatal outcomes South Africa scores poorly compared to other upper-middle income countries (Penn-Kekana & Blaauw, 2002:14). The high stillbirth rate compared to the neonatal death rate reflects poor quality of antenatal care. Maternal and perinatal mortality is recognised as a problem and as a priority for action in the Millennium Development Goals (Thieren & Beusenberg, 2005:11). The Saving Mothers (Pattinson, 2002: 37-135) and Saving Babies (Pattinson, 2004:4-35) reports describe the causes and avoidable factors of these deaths with recommendations on how to improve care. The quality of care during the antenatal period may impact on the health of the pregnant woman and the outcome of the pregnancy, in particular on the still birth rate. In primary health care services there are many factors which may impact on and influence the quality of antenatal care. For example with the implementation of the comprehensive primary health care services package (Department of Health, 2001a:21-35) changes at clinic level resulted in a large number of primary health care professional nurses having to provide antenatal care, who previously may only have worked with one aspect of the primary health care package such as minor ailments or childcare. Because skills of midwifery or antenatal care, had not been practiced by some of these professional nurses, perhaps since completion of basic training, their level of competence has declined, and they have not been exposed to new developments in the field of midwifery. The practice of primary health care nurses is also influenced by the impact of diseases not specifically related to pregnancy like HIV/AIDS and tuberculosis. The principles of quality antenatal care are known (Chalmers et al. 2001:203) but despite the knowledge about these principles the maternal and perinatal mortality remains high. The Basic Antenatal Care quality improvement package is designed to assist clinical management and decision making in antenatal care. The implementation of the BANC package may influence the quality of antenatal care positively, which in turn may impact on the outcome of pregnancy for the mother and her baby. The aim of this study was to evaluate the effectiveness of the Basic antenatal care (BANC) package to improve the quality of antenatal care at primary health care clinics.
- Full Text:
- Date Issued: 2007
- Authors: Snyman, J S
- Date: 2007
- Subjects: Pregnant women -- Health and hygiene , Hospitals -- Maternity services -- South Africa -- Port Elizabeth -- Evaluation , Maternal health services
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10037 , http://hdl.handle.net/10948/728 , Pregnant women -- Health and hygiene , Hospitals -- Maternity services -- South Africa -- Port Elizabeth -- Evaluation , Maternal health services
- Description: Pregnancy challenges the health care system in a unique way in that it involves at least two individuals – the woman and the fetus. The death rates of both pregnant women (maternal mortality) and newborns (perinatal mortality) are often used to indicate the quality of care the health system is providing. In terms of maternal and perinatal outcomes South Africa scores poorly compared to other upper-middle income countries (Penn-Kekana & Blaauw, 2002:14). The high stillbirth rate compared to the neonatal death rate reflects poor quality of antenatal care. Maternal and perinatal mortality is recognised as a problem and as a priority for action in the Millennium Development Goals (Thieren & Beusenberg, 2005:11). The Saving Mothers (Pattinson, 2002: 37-135) and Saving Babies (Pattinson, 2004:4-35) reports describe the causes and avoidable factors of these deaths with recommendations on how to improve care. The quality of care during the antenatal period may impact on the health of the pregnant woman and the outcome of the pregnancy, in particular on the still birth rate. In primary health care services there are many factors which may impact on and influence the quality of antenatal care. For example with the implementation of the comprehensive primary health care services package (Department of Health, 2001a:21-35) changes at clinic level resulted in a large number of primary health care professional nurses having to provide antenatal care, who previously may only have worked with one aspect of the primary health care package such as minor ailments or childcare. Because skills of midwifery or antenatal care, had not been practiced by some of these professional nurses, perhaps since completion of basic training, their level of competence has declined, and they have not been exposed to new developments in the field of midwifery. The practice of primary health care nurses is also influenced by the impact of diseases not specifically related to pregnancy like HIV/AIDS and tuberculosis. The principles of quality antenatal care are known (Chalmers et al. 2001:203) but despite the knowledge about these principles the maternal and perinatal mortality remains high. The Basic Antenatal Care quality improvement package is designed to assist clinical management and decision making in antenatal care. The implementation of the BANC package may influence the quality of antenatal care positively, which in turn may impact on the outcome of pregnancy for the mother and her baby. The aim of this study was to evaluate the effectiveness of the Basic antenatal care (BANC) package to improve the quality of antenatal care at primary health care clinics.
- Full Text:
- Date Issued: 2007
Elephant feeding behaviour and forage offtake implications in the Addo Elephant National Park
- Authors: Lessing, Joan Susanna
- Date: 2007
- Subjects: Elephants -- South Africa -- Addo Elephant National Park , Elephants -- Behavior , Addo Elephant National Park (South Africa) , Mammals -- Behavior
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10712 , http://hdl.handle.net/10948/542 , http://hdl.handle.net/10948/d1012016 , Elephants -- South Africa -- Addo Elephant National Park , Elephants -- Behavior , Addo Elephant National Park (South Africa) , Mammals -- Behavior
- Description: Elephants, as megaherbivores and keystone species have major impacts, both positive and negative, on ecosystems such as the Subtropical Thicket of the Eastern Cape. The feeding behaviour of elephants was quantified so as to firstly determine the preferred feeding heights of elephants, and secondly to determine if feeding behaviour and impact varies with size and sex. The preferred feeding height was determined with experimental feeding trials. Feeding height, pluck size, foraging rate and the proportion of plant material discarded were used to test for differences between elephants of different sizes and sexes in the Addo Elephant National Park. The influence of plant growth form on sex-specific feeding was also considered. Elephants preferred to feed at the lowest heights. The preferred feeding height was not related to body size. A wide range of feeding heights was recorded including and extending beyond, both the preferred and maximum feeding height of co-existing indigenous browsers. There was no difference in feeding height between the sizes and sexes. In free ranging conditions, all elephants fed at levels above the preferred foraging height when browsing. There was no difference in feeding behaviour between the different sized elephants, or between males and females. Adult elephants however exhibited larger ranges of feeding heights, pluck sizes, foraging rates and intake rates, including the maximum and minimum values. Growth form influenced the feeding of male and female elephants differently. Elephant feeding behaviour appears to limit opportunities for resource partitioning by way of feeding height segregation. Elephants are also capable of dominating the browse resources available to co-existing browsers by removing large amounts of forage at lower heights. The extent of elephant impact seems to be comparable between sizes and sexes, although adults and especially larger males are often able to use foraging opportunities that other elephants can not effectively utilize. Findings suggest that the feeding heights of elephants are determined by forage availability and reflect the diet in terms of browse or grass. The findings can be used, together with browse inventory methods, to determine browse resources available to elephants, and can also be used to develop monitoring tools to assess the impacts of elephants on plants.
- Full Text:
- Date Issued: 2007
- Authors: Lessing, Joan Susanna
- Date: 2007
- Subjects: Elephants -- South Africa -- Addo Elephant National Park , Elephants -- Behavior , Addo Elephant National Park (South Africa) , Mammals -- Behavior
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10712 , http://hdl.handle.net/10948/542 , http://hdl.handle.net/10948/d1012016 , Elephants -- South Africa -- Addo Elephant National Park , Elephants -- Behavior , Addo Elephant National Park (South Africa) , Mammals -- Behavior
- Description: Elephants, as megaherbivores and keystone species have major impacts, both positive and negative, on ecosystems such as the Subtropical Thicket of the Eastern Cape. The feeding behaviour of elephants was quantified so as to firstly determine the preferred feeding heights of elephants, and secondly to determine if feeding behaviour and impact varies with size and sex. The preferred feeding height was determined with experimental feeding trials. Feeding height, pluck size, foraging rate and the proportion of plant material discarded were used to test for differences between elephants of different sizes and sexes in the Addo Elephant National Park. The influence of plant growth form on sex-specific feeding was also considered. Elephants preferred to feed at the lowest heights. The preferred feeding height was not related to body size. A wide range of feeding heights was recorded including and extending beyond, both the preferred and maximum feeding height of co-existing indigenous browsers. There was no difference in feeding height between the sizes and sexes. In free ranging conditions, all elephants fed at levels above the preferred foraging height when browsing. There was no difference in feeding behaviour between the different sized elephants, or between males and females. Adult elephants however exhibited larger ranges of feeding heights, pluck sizes, foraging rates and intake rates, including the maximum and minimum values. Growth form influenced the feeding of male and female elephants differently. Elephant feeding behaviour appears to limit opportunities for resource partitioning by way of feeding height segregation. Elephants are also capable of dominating the browse resources available to co-existing browsers by removing large amounts of forage at lower heights. The extent of elephant impact seems to be comparable between sizes and sexes, although adults and especially larger males are often able to use foraging opportunities that other elephants can not effectively utilize. Findings suggest that the feeding heights of elephants are determined by forage availability and reflect the diet in terms of browse or grass. The findings can be used, together with browse inventory methods, to determine browse resources available to elephants, and can also be used to develop monitoring tools to assess the impacts of elephants on plants.
- Full Text:
- Date Issued: 2007
Eluvial chromite resources of the Great Dyke of Zimbabwe
- Authors: Musa, Caston Tamburayi
- Date: 2007
- Subjects: Dikes (Geology) -- Zimbabwe Chromite -- Zimbabwe Geology -- Zimbabwe Olivine Serpentinite Eluvium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5046 , http://hdl.handle.net/10962/d1007731
- Description: Apart from the concentrations of chromite in layers within the Great Dyke and other ultramafic complexes, chromite also occurs as interstitial grains throughout the olivine-bearing rock-types. These olivine-bearing rocks include no rites, gabbros, dunites and pyroxenites. Chromite concentration in these rocks varies from 0.48 to 3.09 per cent of the rock, usually in the form of chromite (Ahrens, 1965; Worst, 1960). A small fraction of this chromite settled to form chromitite layers whilst the remainder is retained within the rock mass as finely disseminated chromite and chromite interstitial to olivine. This retained chromite is much finer grained than layer chromite and is the primary source of eluvial chromite (Cotterill, 1981). During weathering of the serpentine rock and transportation by rainwater, the heavier chromite and magnetite grains are re-deposited along watercourses and vleis or valleys as the speed of the water is retarded sufficiently for the heavier particles to settle. The lighter serpentine material is removed and the chromite concentration in the soil is increased, thus resulting in eluvial chromite (Keech et ai, 1961; Worst, 1960; Prendergast, 1978). The concentration of chromite particles in soil can be up to 15 (or more) Cr₂O₃ %, resulting in economic and exploitable deposits, located primarily along the Great Dyke fiacks. A preliminary evaluation of the eluvials indicate that the Great Dyke could be host to up to 10 million tonnes of potential chromite concentrates which could be processed from such eluvial concentrates. These chromite-rich soils can be mined more cheaply than the traditional seams mining and processed into chromite concentrates through simple mechanical processing techniques of spirals, jigs and heavy media separators. The resultant chromite concentrates are of high quality and can be used to manufacture chromite ore briquettes, which are an alternative to lumpy chromite smelter feed. The main challenges to eluvial mining are the inevitable environmental degradation and coming up with methods that could possibly mitigate against such environmental damage. The distribution of these eluvials over vast plains as thin soil horizons, necessitate use of mobile concentrator plants and hence establishment of extensive infrastructure. These challenges, however, are not insurmountable and test mining and previous production runs have proved profitable. The eluvials are also associated with some lateritic nickel concentrations. The nickel occurs in close association with some oxide such as goethite and garnierite and is associated with iron-manganiferous soil pisolites. The analyses of these pisolites indicate high nickel grades of generally above 1.00 %Ni. Such high nickel-content of Great Dyke laterites warrant, further investigations.
- Full Text:
- Date Issued: 2007
- Authors: Musa, Caston Tamburayi
- Date: 2007
- Subjects: Dikes (Geology) -- Zimbabwe Chromite -- Zimbabwe Geology -- Zimbabwe Olivine Serpentinite Eluvium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5046 , http://hdl.handle.net/10962/d1007731
- Description: Apart from the concentrations of chromite in layers within the Great Dyke and other ultramafic complexes, chromite also occurs as interstitial grains throughout the olivine-bearing rock-types. These olivine-bearing rocks include no rites, gabbros, dunites and pyroxenites. Chromite concentration in these rocks varies from 0.48 to 3.09 per cent of the rock, usually in the form of chromite (Ahrens, 1965; Worst, 1960). A small fraction of this chromite settled to form chromitite layers whilst the remainder is retained within the rock mass as finely disseminated chromite and chromite interstitial to olivine. This retained chromite is much finer grained than layer chromite and is the primary source of eluvial chromite (Cotterill, 1981). During weathering of the serpentine rock and transportation by rainwater, the heavier chromite and magnetite grains are re-deposited along watercourses and vleis or valleys as the speed of the water is retarded sufficiently for the heavier particles to settle. The lighter serpentine material is removed and the chromite concentration in the soil is increased, thus resulting in eluvial chromite (Keech et ai, 1961; Worst, 1960; Prendergast, 1978). The concentration of chromite particles in soil can be up to 15 (or more) Cr₂O₃ %, resulting in economic and exploitable deposits, located primarily along the Great Dyke fiacks. A preliminary evaluation of the eluvials indicate that the Great Dyke could be host to up to 10 million tonnes of potential chromite concentrates which could be processed from such eluvial concentrates. These chromite-rich soils can be mined more cheaply than the traditional seams mining and processed into chromite concentrates through simple mechanical processing techniques of spirals, jigs and heavy media separators. The resultant chromite concentrates are of high quality and can be used to manufacture chromite ore briquettes, which are an alternative to lumpy chromite smelter feed. The main challenges to eluvial mining are the inevitable environmental degradation and coming up with methods that could possibly mitigate against such environmental damage. The distribution of these eluvials over vast plains as thin soil horizons, necessitate use of mobile concentrator plants and hence establishment of extensive infrastructure. These challenges, however, are not insurmountable and test mining and previous production runs have proved profitable. The eluvials are also associated with some lateritic nickel concentrations. The nickel occurs in close association with some oxide such as goethite and garnierite and is associated with iron-manganiferous soil pisolites. The analyses of these pisolites indicate high nickel grades of generally above 1.00 %Ni. Such high nickel-content of Great Dyke laterites warrant, further investigations.
- Full Text:
- Date Issued: 2007
Emotional intelligence and effective team functioning of MBA syndicate groups at the NMMU business school
- Authors: Doolabh, Chetna Gidhar
- Date: 2007
- Subjects: Emotional intelligence , Interpersonal relations , Teams in the workplace , Nelson Mandela Metropolitan University. Business School
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8747 , http://hdl.handle.net/10948/740 , Emotional intelligence , Interpersonal relations , Teams in the workplace , Nelson Mandela Metropolitan University. Business School
- Description: A common issue in leadership development is the high flyers who reach a position where their lack of “soft” skills hampers their performance and proves a barrier to their continued progression to higher levels of responsibility (Newell, 2002: 288). Business Schools offering Masters in Business Administration (MBA) programmes assist in developing managers with not just managerial competence but also with “soft” skills. By delivering educated business managers, these managers through their intellectual skills and community sensitive values, will lead future transformational processes. It is useful and interesting to consider how important emotional intelligence is for effective performance at work. A considerable body of research suggests that an employee’s ability to perceive, identify, and manage emotion provides the basis for the kinds of social and emotional competencies that are important for success in almost any position. Furthermore, as the pace of change increases and the world of work make ever-greater demands on an employee’s cognitive, emotional, and physical resources, this particular set of abilities will become increasingly important (Cherniss, 2000). The primary objective of this study is to determine the perceptions of the Masters in Business Administration (MBA), B-Tech in Business Administration (BBA), Advanced Business Programme (ABP) programmes and the Business School Alumni to determine the overall emotional intelligence profile of students as well as the effective team functions of the syndicate groups. Based on the main findings of the survey, it was concluded that emotional intelligence is an important factor for the NMMU Business School, MBA Unit students. The skills attained through the course work will not only improve team effectiveness in the syndicate group functioning but also enhance their performance in the business environment. The MBA team learning experiences enhances workplace learning as the ability to work in a team and ability to think and act independently are highly desired skills and competencies for success in the workplace.
- Full Text:
- Date Issued: 2007
- Authors: Doolabh, Chetna Gidhar
- Date: 2007
- Subjects: Emotional intelligence , Interpersonal relations , Teams in the workplace , Nelson Mandela Metropolitan University. Business School
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8747 , http://hdl.handle.net/10948/740 , Emotional intelligence , Interpersonal relations , Teams in the workplace , Nelson Mandela Metropolitan University. Business School
- Description: A common issue in leadership development is the high flyers who reach a position where their lack of “soft” skills hampers their performance and proves a barrier to their continued progression to higher levels of responsibility (Newell, 2002: 288). Business Schools offering Masters in Business Administration (MBA) programmes assist in developing managers with not just managerial competence but also with “soft” skills. By delivering educated business managers, these managers through their intellectual skills and community sensitive values, will lead future transformational processes. It is useful and interesting to consider how important emotional intelligence is for effective performance at work. A considerable body of research suggests that an employee’s ability to perceive, identify, and manage emotion provides the basis for the kinds of social and emotional competencies that are important for success in almost any position. Furthermore, as the pace of change increases and the world of work make ever-greater demands on an employee’s cognitive, emotional, and physical resources, this particular set of abilities will become increasingly important (Cherniss, 2000). The primary objective of this study is to determine the perceptions of the Masters in Business Administration (MBA), B-Tech in Business Administration (BBA), Advanced Business Programme (ABP) programmes and the Business School Alumni to determine the overall emotional intelligence profile of students as well as the effective team functions of the syndicate groups. Based on the main findings of the survey, it was concluded that emotional intelligence is an important factor for the NMMU Business School, MBA Unit students. The skills attained through the course work will not only improve team effectiveness in the syndicate group functioning but also enhance their performance in the business environment. The MBA team learning experiences enhances workplace learning as the ability to work in a team and ability to think and act independently are highly desired skills and competencies for success in the workplace.
- Full Text:
- Date Issued: 2007
Endozoochory in the subtropical thicket: comparing effects of species with different digestive systems on seed fate
- Authors: Davis, Shavaughn
- Date: 2007
- Subjects: Seeds -- Dispersal
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10714 , http://hdl.handle.net/10948/494 , http://hdl.handle.net/10948/d1012018 , Seeds -- Dispersal
- Description: Endozoochory is an important form of seed dispersal and as such plays a fundamental role in plant population and community ecology. This is especially true in the Subtropical Thicket biome where many plant species are adapted for endozoochory. Endozoochorous seed dispersal is carried out by a wide range of thicket fauna, but changes in the faunal assemblage associated with transformed thicket threatens to disrupt the process of endozoochorous seed dispersal and in turn the regeneration dynamics of thicket plants. Outside of conservation areas, indigenous seed dispersers are often replaced by domestic species, such as goats, which are hypothesized to differ in their seed dispersal efficiencies. The dispersal efficiencies of important thicket seed dispersers that occur in transformed and untransformed thicket were therefore investigated. The influence of gut morphologyphysiology on seed gut passage time, seed mortality and germination in animal species representing different digestive models was measured, as well as the role of black-backed jackal in thicket plant seed dispersal. Black-backed jackal were found to disperse the seeds of few thicket plant species and are therefore not considered important thicket seed dispersers under the climatic conditions prevailing during the study. The average gut passage time of seeds was found to differ significantly between birds and mammals, but not between elephants (hindgut fermentor), goats (ruminant) and pigs (omnivore, foregut fermentor) as was expected considering the differences in their digestive morphology. A significantly shorter gut passage of large seeds compared with small seeds was observed in goats, due to the regurgitation of larger seeds. Seed regurgitation in ruminants may prove to be an important factor contributing to their quality as seed dispersers in transformed thicket. The mortality of seeds was significantly higher in goats than in elephants, probably due to the efficient digestion associated with ruminants. The effect of gut passage on seed germination was not consistent and varied between animal species and across different thicket plant species. It was concluded that seed dispersers that occur in transformed and untransformed thicket differ in their seed dispersal efficiency due, in part, to differences in the nature of their digestive tracts. This has important implications for the process of seed dispersal in thicket, and the rehabilitation of degraded thicket vegetation.
- Full Text:
- Date Issued: 2007
- Authors: Davis, Shavaughn
- Date: 2007
- Subjects: Seeds -- Dispersal
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10714 , http://hdl.handle.net/10948/494 , http://hdl.handle.net/10948/d1012018 , Seeds -- Dispersal
- Description: Endozoochory is an important form of seed dispersal and as such plays a fundamental role in plant population and community ecology. This is especially true in the Subtropical Thicket biome where many plant species are adapted for endozoochory. Endozoochorous seed dispersal is carried out by a wide range of thicket fauna, but changes in the faunal assemblage associated with transformed thicket threatens to disrupt the process of endozoochorous seed dispersal and in turn the regeneration dynamics of thicket plants. Outside of conservation areas, indigenous seed dispersers are often replaced by domestic species, such as goats, which are hypothesized to differ in their seed dispersal efficiencies. The dispersal efficiencies of important thicket seed dispersers that occur in transformed and untransformed thicket were therefore investigated. The influence of gut morphologyphysiology on seed gut passage time, seed mortality and germination in animal species representing different digestive models was measured, as well as the role of black-backed jackal in thicket plant seed dispersal. Black-backed jackal were found to disperse the seeds of few thicket plant species and are therefore not considered important thicket seed dispersers under the climatic conditions prevailing during the study. The average gut passage time of seeds was found to differ significantly between birds and mammals, but not between elephants (hindgut fermentor), goats (ruminant) and pigs (omnivore, foregut fermentor) as was expected considering the differences in their digestive morphology. A significantly shorter gut passage of large seeds compared with small seeds was observed in goats, due to the regurgitation of larger seeds. Seed regurgitation in ruminants may prove to be an important factor contributing to their quality as seed dispersers in transformed thicket. The mortality of seeds was significantly higher in goats than in elephants, probably due to the efficient digestion associated with ruminants. The effect of gut passage on seed germination was not consistent and varied between animal species and across different thicket plant species. It was concluded that seed dispersers that occur in transformed and untransformed thicket differ in their seed dispersal efficiency due, in part, to differences in the nature of their digestive tracts. This has important implications for the process of seed dispersal in thicket, and the rehabilitation of degraded thicket vegetation.
- Full Text:
- Date Issued: 2007
Engaging employees to build a performance culture in Telkom's NCC division
- Authors: Goliath, Elize
- Date: 2007
- Subjects: Performance -- Management , Quality assurance -- Management , Organizational effectiveness , Telkom (Firm : South Africa)
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8591 , http://hdl.handle.net/10948/1051 , Performance -- Management , Quality assurance -- Management , Organizational effectiveness , Telkom (Firm : South Africa)
- Description: Operating as a commercial company since October 1991, Telkom has grown into the largest communications services provider in Africa based on operating revenue and assets. The Group, consisting of the fixed-line company Telkom and a 50 per cent shareholding in mobile operator Vodacom. Telkom has changed its vision to the following: “To be a leading customer and employee centric ICT solutions service provider”. The company has been retrenching staff since 1999 and the staff numbers have reduced significantly from approximately 65 000 people to 25 575 people in 2006. The focus has been on increasing shareholder value and the staff feel that their value has not been recognised. The research paper focused on the extent that employees engaged to build a performance culture in Telkom’s NCC division. The following research methodology was followed: - A literature survey to determine factors or behaviours that will enhance employee engagement in building a performance culture and what Telkom NCC can do to build the workplace that will foster higher levels of employee engagement. - A survey was conducted to determine what the engagement levels of employees are at Telkom NCC, what stops the employees from doing their best and what Telkom NCC division can do to show they care and value their staff as according to their employees by means of a questionnaire. - The findings from the literature study and empirical study would be used to determine to what extent are employees engaged to build a performance culture in Telkom’s NCC division. A self administered questionnaire was used to collect the data required for this research. In conclusion it was said that employee engagement is a partnership between the company and the employees where everyone works together to achieve the business objectives of the company and the personal aspirations of employees. The organization has the responsibility to create the conditions for this to happen (Understanding Employee Engagement, 2004: 2). It was recommended that in order for NCC to enhance their employees attitudes toward the promoters’ team especially in terms of pride, strong attachment, feeling part of the family and motivating employees to do well promoters must concentrate on building relationships with their teams and individual members of the team. Employees must also be given decision making power for implementing the idea. NCC should educate their leaders on the value of recognition and the best way to go about it. In order for employees to grow and be promoted into higher positions, NCC must consider that if positions become available that they first be advertised in the NCC division before it be made available to the rest of the company.
- Full Text:
- Date Issued: 2007
- Authors: Goliath, Elize
- Date: 2007
- Subjects: Performance -- Management , Quality assurance -- Management , Organizational effectiveness , Telkom (Firm : South Africa)
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8591 , http://hdl.handle.net/10948/1051 , Performance -- Management , Quality assurance -- Management , Organizational effectiveness , Telkom (Firm : South Africa)
- Description: Operating as a commercial company since October 1991, Telkom has grown into the largest communications services provider in Africa based on operating revenue and assets. The Group, consisting of the fixed-line company Telkom and a 50 per cent shareholding in mobile operator Vodacom. Telkom has changed its vision to the following: “To be a leading customer and employee centric ICT solutions service provider”. The company has been retrenching staff since 1999 and the staff numbers have reduced significantly from approximately 65 000 people to 25 575 people in 2006. The focus has been on increasing shareholder value and the staff feel that their value has not been recognised. The research paper focused on the extent that employees engaged to build a performance culture in Telkom’s NCC division. The following research methodology was followed: - A literature survey to determine factors or behaviours that will enhance employee engagement in building a performance culture and what Telkom NCC can do to build the workplace that will foster higher levels of employee engagement. - A survey was conducted to determine what the engagement levels of employees are at Telkom NCC, what stops the employees from doing their best and what Telkom NCC division can do to show they care and value their staff as according to their employees by means of a questionnaire. - The findings from the literature study and empirical study would be used to determine to what extent are employees engaged to build a performance culture in Telkom’s NCC division. A self administered questionnaire was used to collect the data required for this research. In conclusion it was said that employee engagement is a partnership between the company and the employees where everyone works together to achieve the business objectives of the company and the personal aspirations of employees. The organization has the responsibility to create the conditions for this to happen (Understanding Employee Engagement, 2004: 2). It was recommended that in order for NCC to enhance their employees attitudes toward the promoters’ team especially in terms of pride, strong attachment, feeling part of the family and motivating employees to do well promoters must concentrate on building relationships with their teams and individual members of the team. Employees must also be given decision making power for implementing the idea. NCC should educate their leaders on the value of recognition and the best way to go about it. In order for employees to grow and be promoted into higher positions, NCC must consider that if positions become available that they first be advertised in the NCC division before it be made available to the rest of the company.
- Full Text:
- Date Issued: 2007
Establishing the benefits of implementing an I.T. project management office in the Nelson Mandela Metropolitan area
- Martin, Michael Ronald Charles
- Authors: Martin, Michael Ronald Charles
- Date: 2007
- Subjects: Project management -- South Africa -- Port Elizabeth -- Computer network resources , Information technology -- South Africa -- Port Elizabeth -- Management
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9266 , http://hdl.handle.net/10948/558 , Project management -- South Africa -- Port Elizabeth -- Computer network resources , Information technology -- South Africa -- Port Elizabeth -- Management
- Description: The well-known concept of a Project Manager managing an I.T. project in relative isolation is no longer a viable option for organisations that are running numerous projects simultaneously. Due to the enormous costs and risks involved in many of these projects, there needs to be a means to ensure success. This has led to the establishment of the concept of a Project Management Office (PMO). An autonomous business unit that is responsible for managing all projects within an organisation. The need for a Project Management Office (PMO) to effectively manage multiple projects is becoming more and more accepted worldwide. The benefits of a PMO are well documented, but whether these benefits will apply to organisations within the NMM area needed to be investigated. A detailed analysis of the benefits of Project Management and in particular a PMO, have been investigated by means of a literature study. An investigation into the effectiveness of PMO’s in South Africa in general, was conducted by means of a survey targeted at a group of I.T. Project Managers located in all the major centres. A further survey was conducted among local I.T. managers to determine their current level of success and their expectations for the future. When reviewing the expectations of local I.T. management against the performance of Project Managers that are currently operating within PMOs, it is clear that organisations within the NMM area are in need of PMO’s and would certainly benefit from their establishment.
- Full Text:
- Date Issued: 2007
- Authors: Martin, Michael Ronald Charles
- Date: 2007
- Subjects: Project management -- South Africa -- Port Elizabeth -- Computer network resources , Information technology -- South Africa -- Port Elizabeth -- Management
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9266 , http://hdl.handle.net/10948/558 , Project management -- South Africa -- Port Elizabeth -- Computer network resources , Information technology -- South Africa -- Port Elizabeth -- Management
- Description: The well-known concept of a Project Manager managing an I.T. project in relative isolation is no longer a viable option for organisations that are running numerous projects simultaneously. Due to the enormous costs and risks involved in many of these projects, there needs to be a means to ensure success. This has led to the establishment of the concept of a Project Management Office (PMO). An autonomous business unit that is responsible for managing all projects within an organisation. The need for a Project Management Office (PMO) to effectively manage multiple projects is becoming more and more accepted worldwide. The benefits of a PMO are well documented, but whether these benefits will apply to organisations within the NMM area needed to be investigated. A detailed analysis of the benefits of Project Management and in particular a PMO, have been investigated by means of a literature study. An investigation into the effectiveness of PMO’s in South Africa in general, was conducted by means of a survey targeted at a group of I.T. Project Managers located in all the major centres. A further survey was conducted among local I.T. managers to determine their current level of success and their expectations for the future. When reviewing the expectations of local I.T. management against the performance of Project Managers that are currently operating within PMOs, it is clear that organisations within the NMM area are in need of PMO’s and would certainly benefit from their establishment.
- Full Text:
- Date Issued: 2007
Estimating erosion of cretaceous-aged kimberlites in the Republic of South Africa through the examination of upper-crustal xenoliths
- Authors: Hanson, Emily Kate
- Date: 2007
- Subjects: Kimberlite -- South Africa , Igneous rocks -- Inclusions -- South Africa , Erosion -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4942 , http://hdl.handle.net/10962/d1005554 , Kimberlite -- South Africa , Igneous rocks -- Inclusions -- South Africa , Erosion -- South Africa
- Description: he estimation of post-emplacement kimberlite erosion in South Africa through the study of upper-crustal xenoliths is relatively unexplored; however the presence of these xenoliths has been recognized for well over 100 years. Post-emplacement erosion levels of a small number of South African kimberlite pipes have been inferred through the study of the degree of country-rock diagenesis, the depth of sill formation, the depth of the initiation of the diatreme and fission track studies. Through these studies, several estimates were proposed for the Group I Kimberley kimberlites. Although the 1400 m estimate of erosion remains widely accepted today, this estimate relies on the presence of Karoo-like basalt xenoliths in the Group I Kimberley kimberlites, as their presence proves that basalt existed in the Kimberley area when the kimberlites were emplaced. Basaltic xenoliths were described during the early stages of mining in Kimberley, though only one of these descriptions suggests that the ‘basaltic’ boulders correlate with the Karoo basalts. Because of the discrepancy between these early documentations of upper-crustal xenoliths and because the occurrence of Karoo-like basalt xenoliths in the Group I Kimberley kimberlites is under question, a re-investigation of the erosion levels and the upper crustal xenolith suites in South African, Cretaceous-aged kimberlites, including Melton Wold, Voorspoed, Roberts Victor, West End, Record Stone Quarry, Finsch, Markt, Frank Smith, Pampoenpoort, Uintjiesberg, Koffiefontein / Ebenheuyser, Monastery, Kimberley (Big Hole), Kamfersdam , Jagersfontein, Kaal Vallei, De Beers, Bultfontein, Lushof, Britstown Cluster, Hebron and Lovedale, was conducted. This study presents the analytical results for upper-crustal sandstone and basalt xenoliths collected from dumps, excavation pits and borehole core at the above-mentioned kimberlites, and demonstrates that they correlate with stratigraphic units of the Karoo Supergroup on the basis of mineral and geochemical compositions. These upper-crustal xenoliths are incorporated into kimberlites and down-rafted to levels below their stratigraphic position during kimberlite emplacement, consequently recording the broad stratigraphy into which each kimberlite is emplaced. Therefore, the Cretaceous lateral extent of the Karoo Supergroup is inferred and post-emplacement erosion estimated by reconstructing the stratigraphy based on upper-crustal xenolith suites for each kimberlite and calculating the total thickness of the now-eroded units. The distribution of sandstone xenoliths indicates that during the Cretaceous the lateral extent of the Dwyka, Ecca and Beaufort Groups encompassed all of the examined kimberlites, while the ‘Stormberg’ Group was constrained to an area outlined by the Voorspoed and Monastery kimberlites. Similarly, basalt xenoliths occur in all of the Group II and transitional (143 – 100 Ma) kimberlites but only in the Group I (90 – 74 Ma) kimberlites that lie within close proximity to the western outcrop margin of the outcrop area of the Drakensberg Group basalts (Lesotho Remnant), namely Monastery, Jagersfontein and Kaal Vallei. This trend implies an eastward-retreat of the inland erosion front of the Karoo basalts between 140 and 90 Ma and subsequent erosion of the underlying sedimentary units. It also suggests that a thicker succession of Karoo strata was present at the time of Group II and transitional kimberlite emplacement and that there has been more post-emplacement erosion in these kimberlites than the younger Group I kimberlites, except for Monastery, Jagersfontein and Kaal Vallei. Estimates are unique to each kimberlite as they are dependent on both stratigraphic location, elevation and present country rock, and range from approximately 1000 – 2500 m for the older kimberlites and less than 700 m to 1400 m for the younger kimberlites. Furthermore, the upper-crustal xenoliths found at the Group I Kimberley kimberlites and the coinciding trend of basalt erosion demonstrate that Karoo basalts were eroded from the Kimberley area by the time the Group I Kimberley kimberlites erupted (~85 Ma). Therefore, basalts are omitted from the Group I Kimberley kimberlites post-emplacement erosion estimate, and the upper Beaufort Group is considered the upper limit of the stratigraphy that was present at the time of the eruption of the Group I Kimberley pipes. Therefore, the erosion estimates decrease from a previous estimate of 1400 m down to 400 to 1100 m, where 850 m is considered a dependable intermediate estimate.
- Full Text:
- Date Issued: 2007
- Authors: Hanson, Emily Kate
- Date: 2007
- Subjects: Kimberlite -- South Africa , Igneous rocks -- Inclusions -- South Africa , Erosion -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4942 , http://hdl.handle.net/10962/d1005554 , Kimberlite -- South Africa , Igneous rocks -- Inclusions -- South Africa , Erosion -- South Africa
- Description: he estimation of post-emplacement kimberlite erosion in South Africa through the study of upper-crustal xenoliths is relatively unexplored; however the presence of these xenoliths has been recognized for well over 100 years. Post-emplacement erosion levels of a small number of South African kimberlite pipes have been inferred through the study of the degree of country-rock diagenesis, the depth of sill formation, the depth of the initiation of the diatreme and fission track studies. Through these studies, several estimates were proposed for the Group I Kimberley kimberlites. Although the 1400 m estimate of erosion remains widely accepted today, this estimate relies on the presence of Karoo-like basalt xenoliths in the Group I Kimberley kimberlites, as their presence proves that basalt existed in the Kimberley area when the kimberlites were emplaced. Basaltic xenoliths were described during the early stages of mining in Kimberley, though only one of these descriptions suggests that the ‘basaltic’ boulders correlate with the Karoo basalts. Because of the discrepancy between these early documentations of upper-crustal xenoliths and because the occurrence of Karoo-like basalt xenoliths in the Group I Kimberley kimberlites is under question, a re-investigation of the erosion levels and the upper crustal xenolith suites in South African, Cretaceous-aged kimberlites, including Melton Wold, Voorspoed, Roberts Victor, West End, Record Stone Quarry, Finsch, Markt, Frank Smith, Pampoenpoort, Uintjiesberg, Koffiefontein / Ebenheuyser, Monastery, Kimberley (Big Hole), Kamfersdam , Jagersfontein, Kaal Vallei, De Beers, Bultfontein, Lushof, Britstown Cluster, Hebron and Lovedale, was conducted. This study presents the analytical results for upper-crustal sandstone and basalt xenoliths collected from dumps, excavation pits and borehole core at the above-mentioned kimberlites, and demonstrates that they correlate with stratigraphic units of the Karoo Supergroup on the basis of mineral and geochemical compositions. These upper-crustal xenoliths are incorporated into kimberlites and down-rafted to levels below their stratigraphic position during kimberlite emplacement, consequently recording the broad stratigraphy into which each kimberlite is emplaced. Therefore, the Cretaceous lateral extent of the Karoo Supergroup is inferred and post-emplacement erosion estimated by reconstructing the stratigraphy based on upper-crustal xenolith suites for each kimberlite and calculating the total thickness of the now-eroded units. The distribution of sandstone xenoliths indicates that during the Cretaceous the lateral extent of the Dwyka, Ecca and Beaufort Groups encompassed all of the examined kimberlites, while the ‘Stormberg’ Group was constrained to an area outlined by the Voorspoed and Monastery kimberlites. Similarly, basalt xenoliths occur in all of the Group II and transitional (143 – 100 Ma) kimberlites but only in the Group I (90 – 74 Ma) kimberlites that lie within close proximity to the western outcrop margin of the outcrop area of the Drakensberg Group basalts (Lesotho Remnant), namely Monastery, Jagersfontein and Kaal Vallei. This trend implies an eastward-retreat of the inland erosion front of the Karoo basalts between 140 and 90 Ma and subsequent erosion of the underlying sedimentary units. It also suggests that a thicker succession of Karoo strata was present at the time of Group II and transitional kimberlite emplacement and that there has been more post-emplacement erosion in these kimberlites than the younger Group I kimberlites, except for Monastery, Jagersfontein and Kaal Vallei. Estimates are unique to each kimberlite as they are dependent on both stratigraphic location, elevation and present country rock, and range from approximately 1000 – 2500 m for the older kimberlites and less than 700 m to 1400 m for the younger kimberlites. Furthermore, the upper-crustal xenoliths found at the Group I Kimberley kimberlites and the coinciding trend of basalt erosion demonstrate that Karoo basalts were eroded from the Kimberley area by the time the Group I Kimberley kimberlites erupted (~85 Ma). Therefore, basalts are omitted from the Group I Kimberley kimberlites post-emplacement erosion estimate, and the upper Beaufort Group is considered the upper limit of the stratigraphy that was present at the time of the eruption of the Group I Kimberley pipes. Therefore, the erosion estimates decrease from a previous estimate of 1400 m down to 400 to 1100 m, where 850 m is considered a dependable intermediate estimate.
- Full Text:
- Date Issued: 2007
Estimating the willingness-to-pay for restoring indigenous vegetation at selected sites in South Africa
- Authors: Tessendorf, Sharon Erica
- Date: 2007
- Subjects: Water resources development -- South Africa , Water-supply -- South Africa , Alien plants -- South Africa , Restoration ecology -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8999 , http://hdl.handle.net/10948/617 , Water resources development -- South Africa , Water-supply -- South Africa , Alien plants -- South Africa , Restoration ecology -- South Africa
- Description: The Working for Water (WfW) Programme is a public works programme designed to clear South Africa of invasive alien vegetation and to restore lowwater consuming indigenous vegetation in the areas that have been cleared. Funds to clear alien invasives were initially secured on the basis that such a programme would increase water runoff, facilitate biodiversity and ecosystem functioning, and provide social benefits through job creation. The economic merits of the Programme, in terms of increased water yields, has been established in the Western Cape and KwaZulu-Natal, but questioned in the Eastern and Southern Cape. However, there are economic aspects of the studies carried out in the Eastern and Southern Cape that merit more attention than was given them; one of these being the issue of non-water benefits. Preliminary figures emanating from contingent valuation pilot studies conducted at six WfW projects sites indicated that one of these non-water benefits, namely the biodiversity and ecosystem resilience benefit, could be substantial. As such, the primary objective of the present study was to apply the contingent valuation method (CVM) to value people’s preference for indigenous vegetation. This value was intended to serve as a proxy for increased biodiversity and ecosystem resilience at three WfW sites. Despite the controversy surrounding the CVM, it has been found that it is a credible valuation tool. The CVM’s merits lie in its versatility and in the fact that it is the only method available which is capable of obtaining estimates of both nonuse and use values, thus making it applicable for valuing biodiversity. The primary aim of a CVM study is to determine an estimate of the total willingness-to-pay (WTP). In this study, the total WTP figure was calculated by multiplying the median WTP for the local WfW Programme by the total number of user households. The respective total WTP amounts are shown in Table 1. It was anticipated that respondents would be willing to pay more for the national WfW Programme, than for the less inclusive good (i.e. the local WfW Programme). The results correspond with this expectation at the Port Elizabeth and Underberg sites. However, due to strategic factors Worcester respondents were willing to pay more for the local WfW Programme than for the national Programme.
- Full Text:
- Date Issued: 2007
- Authors: Tessendorf, Sharon Erica
- Date: 2007
- Subjects: Water resources development -- South Africa , Water-supply -- South Africa , Alien plants -- South Africa , Restoration ecology -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8999 , http://hdl.handle.net/10948/617 , Water resources development -- South Africa , Water-supply -- South Africa , Alien plants -- South Africa , Restoration ecology -- South Africa
- Description: The Working for Water (WfW) Programme is a public works programme designed to clear South Africa of invasive alien vegetation and to restore lowwater consuming indigenous vegetation in the areas that have been cleared. Funds to clear alien invasives were initially secured on the basis that such a programme would increase water runoff, facilitate biodiversity and ecosystem functioning, and provide social benefits through job creation. The economic merits of the Programme, in terms of increased water yields, has been established in the Western Cape and KwaZulu-Natal, but questioned in the Eastern and Southern Cape. However, there are economic aspects of the studies carried out in the Eastern and Southern Cape that merit more attention than was given them; one of these being the issue of non-water benefits. Preliminary figures emanating from contingent valuation pilot studies conducted at six WfW projects sites indicated that one of these non-water benefits, namely the biodiversity and ecosystem resilience benefit, could be substantial. As such, the primary objective of the present study was to apply the contingent valuation method (CVM) to value people’s preference for indigenous vegetation. This value was intended to serve as a proxy for increased biodiversity and ecosystem resilience at three WfW sites. Despite the controversy surrounding the CVM, it has been found that it is a credible valuation tool. The CVM’s merits lie in its versatility and in the fact that it is the only method available which is capable of obtaining estimates of both nonuse and use values, thus making it applicable for valuing biodiversity. The primary aim of a CVM study is to determine an estimate of the total willingness-to-pay (WTP). In this study, the total WTP figure was calculated by multiplying the median WTP for the local WfW Programme by the total number of user households. The respective total WTP amounts are shown in Table 1. It was anticipated that respondents would be willing to pay more for the national WfW Programme, than for the less inclusive good (i.e. the local WfW Programme). The results correspond with this expectation at the Port Elizabeth and Underberg sites. However, due to strategic factors Worcester respondents were willing to pay more for the local WfW Programme than for the national Programme.
- Full Text:
- Date Issued: 2007
Evaluation and application of electroanalysis for the determination of antioxidants
- Authors: Ragubeer, Nasheen
- Date: 2007
- Subjects: Antioxidants , Nervous system -- Degeneration , Electrochemical analysis , Marine algae , Natural products , Marine metabolites , Sargassum , Legumes , Nuclear magnetic resonance
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3922 , http://hdl.handle.net/10962/d1003981 , Antioxidants , Nervous system -- Degeneration , Electrochemical analysis , Marine algae , Natural products , Marine metabolites , Sargassum , Legumes , Nuclear magnetic resonance
- Description: The role of antioxidants in the prevention of neurodegenerative diseases has been well documented. The use of synthetic antioxidants has decreased due to the ssociation of these compounds with certain cancers. Thus, the search for novel natural antioxidants has gained much focus in research. Most common methods of determining antioxidant capacity are the radical generated assays and biological assays such as lipid peroxidation and the nitroblue tetrazolium assay. Electrochemical methods have been proposed for the determination of bio-active compounds such as antioxidants. The electrochemical methods of cyclic voltammetry and square wave voltammetry were evaluated for the determination of antioxidant capacity initially examining known antioxidants and then using plant extracts of Sutherlandia frutescens as a case study. The antioxidant properties determined by electrochemical methods were validated utilising the non-biological methods of the DPPH, TEAC, ferrozine and FC assay and biological pharmacological methods. The results indicated that Sutherlandia frutescens contains potent antioxidant compounds that are able to reduce lipid peroxidation. The electrochemical techniques of square wave voltammetry and cyclic voltammetry were applied for the screening of a large number of extracts of various algae for the detection of antioxidant compounds. The results indicated that electrochemistry can be used as a preliminary method for the rapid screening of a large number of crude samples for antioxidant compounds. Electrochemical methods were also evaluated as a method for guiding the isolation and purification of antioxidant metabolites in Sargassum elegans. Solvent partitioning and fractionation of the marine alga allowed for the purification of antioxidant compounds. At each step of purification electrochemical methods were utilized to determine which fractions contained the more potent antioxidant compounds and thus guide further purification. The purified antioxidant compounds were elucidated using NMR to determine the structure of the antioxidant compounds.
- Full Text:
- Date Issued: 2007
- Authors: Ragubeer, Nasheen
- Date: 2007
- Subjects: Antioxidants , Nervous system -- Degeneration , Electrochemical analysis , Marine algae , Natural products , Marine metabolites , Sargassum , Legumes , Nuclear magnetic resonance
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3922 , http://hdl.handle.net/10962/d1003981 , Antioxidants , Nervous system -- Degeneration , Electrochemical analysis , Marine algae , Natural products , Marine metabolites , Sargassum , Legumes , Nuclear magnetic resonance
- Description: The role of antioxidants in the prevention of neurodegenerative diseases has been well documented. The use of synthetic antioxidants has decreased due to the ssociation of these compounds with certain cancers. Thus, the search for novel natural antioxidants has gained much focus in research. Most common methods of determining antioxidant capacity are the radical generated assays and biological assays such as lipid peroxidation and the nitroblue tetrazolium assay. Electrochemical methods have been proposed for the determination of bio-active compounds such as antioxidants. The electrochemical methods of cyclic voltammetry and square wave voltammetry were evaluated for the determination of antioxidant capacity initially examining known antioxidants and then using plant extracts of Sutherlandia frutescens as a case study. The antioxidant properties determined by electrochemical methods were validated utilising the non-biological methods of the DPPH, TEAC, ferrozine and FC assay and biological pharmacological methods. The results indicated that Sutherlandia frutescens contains potent antioxidant compounds that are able to reduce lipid peroxidation. The electrochemical techniques of square wave voltammetry and cyclic voltammetry were applied for the screening of a large number of extracts of various algae for the detection of antioxidant compounds. The results indicated that electrochemistry can be used as a preliminary method for the rapid screening of a large number of crude samples for antioxidant compounds. Electrochemical methods were also evaluated as a method for guiding the isolation and purification of antioxidant metabolites in Sargassum elegans. Solvent partitioning and fractionation of the marine alga allowed for the purification of antioxidant compounds. At each step of purification electrochemical methods were utilized to determine which fractions contained the more potent antioxidant compounds and thus guide further purification. The purified antioxidant compounds were elucidated using NMR to determine the structure of the antioxidant compounds.
- Full Text:
- Date Issued: 2007
Evaluation of fishway designs for use at the ebb and flow region of rivers in the Eastern Cape, South Africa
- Authors: Lewis, Hylton Varian
- Date: 2007
- Subjects: Fishways -- South Africa -- Eastern Cape , Fishways -- Design and construction , Aquatic ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5279 , http://hdl.handle.net/10962/d1005123 , Fishways -- South Africa -- Eastern Cape , Fishways -- Design and construction , Aquatic ecology -- South Africa -- Eastern Cape
- Description: Fishways are devices that are increasingly being used worldwide to assist aquatic biofauna to migrate through man-made barriers such as weirs and large-scale dams that are used for water storage, electricity generation etc. and have a negative impact on both the upstream and downstream movement of aquatic organisms. Fishways are usually low gradient channels with evenly placed chambers which allow such migrating aquatic species minimal stress on their passage over these barriers. Despite the existence of national and regional policies for their provision, their construction has often been inhibited through a lack of local assessment of the available designs, and use of ineffective international designs. As part of a larger national research programme, sponsored by the Water Research Commission, to develop a protocol for fishway design and implementation, this study sought to investigate the suitability of vertical slot and sloping baffle designs to assist the migrations of juvenile catadromic fish species in the ebb and flow region of rivers in the Eastern Cape, South Africa. These fishways were initially tested under controlled conditions at the Experimental Fish Farm at the Department of Ichthyology and Fisheries Science, Rhodes University using various fish species. Using the performance data thus collected they were then installed and monitored in the field for the catadromic Myxus capensis (freshwater mullet) and Monodactylus falciformis (cape moony) migrations during March and November of 2005 at the Kowie River ebb and flow weir. The laboratory tests showed that there was a significantly higher level of migration success in the vertical slot compared with the sloping baffle fishway under all conditions (F=82.157; p<0.001). There was, however, a slow decline in levels of success with increased discharge in the vertical slot fishway. This was in contrast to the sloping baffle design where success increased as discharge increased at a steep gradient (F=74.894; p<0.005). The level of success with the M. capensis was related to the size of the fish for both systems with success increasing from the small to the large fish (F=17.755; p<0.001). For the M. falciformis higher levels of success were found to occur in the vertical slot fishway compared to the sloping baffle fishway (F=11.792; p<0.00086), with no significant differences being found with an increase in discharge. Field data indicated similar trends with higher migration success using the vertical slot fishway. M. capensis were better able to negotiate both devices compared to the M. falciformis and overall levels of success were higher for both species in the field than under laboratory conditions where the migration urge may have declined.
- Full Text:
- Date Issued: 2007
- Authors: Lewis, Hylton Varian
- Date: 2007
- Subjects: Fishways -- South Africa -- Eastern Cape , Fishways -- Design and construction , Aquatic ecology -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5279 , http://hdl.handle.net/10962/d1005123 , Fishways -- South Africa -- Eastern Cape , Fishways -- Design and construction , Aquatic ecology -- South Africa -- Eastern Cape
- Description: Fishways are devices that are increasingly being used worldwide to assist aquatic biofauna to migrate through man-made barriers such as weirs and large-scale dams that are used for water storage, electricity generation etc. and have a negative impact on both the upstream and downstream movement of aquatic organisms. Fishways are usually low gradient channels with evenly placed chambers which allow such migrating aquatic species minimal stress on their passage over these barriers. Despite the existence of national and regional policies for their provision, their construction has often been inhibited through a lack of local assessment of the available designs, and use of ineffective international designs. As part of a larger national research programme, sponsored by the Water Research Commission, to develop a protocol for fishway design and implementation, this study sought to investigate the suitability of vertical slot and sloping baffle designs to assist the migrations of juvenile catadromic fish species in the ebb and flow region of rivers in the Eastern Cape, South Africa. These fishways were initially tested under controlled conditions at the Experimental Fish Farm at the Department of Ichthyology and Fisheries Science, Rhodes University using various fish species. Using the performance data thus collected they were then installed and monitored in the field for the catadromic Myxus capensis (freshwater mullet) and Monodactylus falciformis (cape moony) migrations during March and November of 2005 at the Kowie River ebb and flow weir. The laboratory tests showed that there was a significantly higher level of migration success in the vertical slot compared with the sloping baffle fishway under all conditions (F=82.157; p<0.001). There was, however, a slow decline in levels of success with increased discharge in the vertical slot fishway. This was in contrast to the sloping baffle design where success increased as discharge increased at a steep gradient (F=74.894; p<0.005). The level of success with the M. capensis was related to the size of the fish for both systems with success increasing from the small to the large fish (F=17.755; p<0.001). For the M. falciformis higher levels of success were found to occur in the vertical slot fishway compared to the sloping baffle fishway (F=11.792; p<0.00086), with no significant differences being found with an increase in discharge. Field data indicated similar trends with higher migration success using the vertical slot fishway. M. capensis were better able to negotiate both devices compared to the M. falciformis and overall levels of success were higher for both species in the field than under laboratory conditions where the migration urge may have declined.
- Full Text:
- Date Issued: 2007
Evaluation of the safety and efficacy of topical mometasone furoate formulations
- Authors: Chamboko, Bernadett Vongayi
- Date: 2007
- Subjects: Adrenocortical hormones -- Physiological effect , Drugs -- Testing , Dermatopharmacology , High performance liquid chromatography
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3748 , http://hdl.handle.net/10962/d1003226 , Adrenocortical hormones -- Physiological effect , Drugs -- Testing , Dermatopharmacology , High performance liquid chromatography
- Description: The human skin blanching assay (HSBA) is a well-researched and validated method for the bioequivalence assessment of topical corticosteroids. Traditionally, visual assessment of skin blanching has been used. Such testing methods are not conducive for interlaboratory comparisons. Regulatory bodies prefer less subjective methods of analysis. The FDA released guidelines on the assessment of bioequivalence for topical corticosteroids that recommends the use of a chromameter as a reliable method to measure skin blanching although the use of visual assessment with acceptable validation is also provided for. However, the FDA does not elucidate on the manipulation and handling of the chromameter during skin blanching measurements. The purpose of this project was several fold, which included investigations to standardize the manipulation and handling of a chromameter. In particular, measures to avoid skin whitening resulting from the effects of pressure on the skin during chromameter use were investigated. Other methods of analysis should surpass or at least be comparable to the HSBA if such methods are to be used for the assessment of topical corticosteroids. Microdialysis is a relatively new technique for assessing the rate at which drug penetrates the skin. The advantage of using this method is that there are fewer restrictions for selection of an appropriate study population unlike those required for the HSBA where one has to be both a ‘responder’ and a ‘detector’ for their results to be used in data analysis. Microdialysis was investigated by initially conducting experiments in which microdialysis probes were embedded into topical formulations containing mometasone furoate (MF) and the initial results revealed that relatively low drug was released from the formulations. These results indicated that should microdialysis be applied to measure the in vivo release of MF from such topical formulations following application to the skin, even lower concentrations of MF would likely result in the dialysate, necessitating the need for ultra-high sensitive methods of analysis. Typically, the availability of an appropriate analytical technique such as liquid chromatography coupled with mass spectrometry (LCMS) would be a pre-requisite for such in vivo studies. However, only high-pressure liquid chromatography (HPLC) and other less sensitive equipment was available in the laboratories. The study objectives were therefore focussed on in vitro assessment of the release of MF from topical formulations using microdialysis and Franz cells. In addition, the in vivo release of MF was also studied using the HSBA. Data obtained from the microdialysis experiments were compared with the data obtained from the Franz cell diffusion studies in order to provide information on the pharmaceutical availability of MF from the various topical MF dosage forms. Subsequently, pharmaceutical equivalence was investigated from the comparative pharmaceutical availability data using statistical analysis. An additional objective was to attempt to correlate in vitro with in vivo data (IVIVC) to establish a model that could be used to assess safety and efficacy of generic topical drug products. The in vivo data obtained from the HSBA were processed according to the FDA requirements and these pharmacodynamic data were subsequently compared with the microdialysis and Franz cell results. In summary the objectives of this project were: 1. To develop a system to improve the reproducibility of the use of a Minolta® chromameter and compare this with the standard/normal manipulation and handling of such instruments. 2. To develop and validate an HPLC method for the analysis of MF for use with in vitro diffusion studies using microdialysis and Franz cells. 3. To conduct a comparative HSBA on proprietary MF topical creams from two different countries in accordance with the FDA guidance. 4. To assess the pharmaceutical equivalence of topical formulations containing MF using Franz diffusion cells and in vitro microdialysis. 5. To compare the in vivo data obtained from the HSBA with those obtained in vitro using microdialysis and Franz cells.
- Full Text:
- Date Issued: 2007
- Authors: Chamboko, Bernadett Vongayi
- Date: 2007
- Subjects: Adrenocortical hormones -- Physiological effect , Drugs -- Testing , Dermatopharmacology , High performance liquid chromatography
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3748 , http://hdl.handle.net/10962/d1003226 , Adrenocortical hormones -- Physiological effect , Drugs -- Testing , Dermatopharmacology , High performance liquid chromatography
- Description: The human skin blanching assay (HSBA) is a well-researched and validated method for the bioequivalence assessment of topical corticosteroids. Traditionally, visual assessment of skin blanching has been used. Such testing methods are not conducive for interlaboratory comparisons. Regulatory bodies prefer less subjective methods of analysis. The FDA released guidelines on the assessment of bioequivalence for topical corticosteroids that recommends the use of a chromameter as a reliable method to measure skin blanching although the use of visual assessment with acceptable validation is also provided for. However, the FDA does not elucidate on the manipulation and handling of the chromameter during skin blanching measurements. The purpose of this project was several fold, which included investigations to standardize the manipulation and handling of a chromameter. In particular, measures to avoid skin whitening resulting from the effects of pressure on the skin during chromameter use were investigated. Other methods of analysis should surpass or at least be comparable to the HSBA if such methods are to be used for the assessment of topical corticosteroids. Microdialysis is a relatively new technique for assessing the rate at which drug penetrates the skin. The advantage of using this method is that there are fewer restrictions for selection of an appropriate study population unlike those required for the HSBA where one has to be both a ‘responder’ and a ‘detector’ for their results to be used in data analysis. Microdialysis was investigated by initially conducting experiments in which microdialysis probes were embedded into topical formulations containing mometasone furoate (MF) and the initial results revealed that relatively low drug was released from the formulations. These results indicated that should microdialysis be applied to measure the in vivo release of MF from such topical formulations following application to the skin, even lower concentrations of MF would likely result in the dialysate, necessitating the need for ultra-high sensitive methods of analysis. Typically, the availability of an appropriate analytical technique such as liquid chromatography coupled with mass spectrometry (LCMS) would be a pre-requisite for such in vivo studies. However, only high-pressure liquid chromatography (HPLC) and other less sensitive equipment was available in the laboratories. The study objectives were therefore focussed on in vitro assessment of the release of MF from topical formulations using microdialysis and Franz cells. In addition, the in vivo release of MF was also studied using the HSBA. Data obtained from the microdialysis experiments were compared with the data obtained from the Franz cell diffusion studies in order to provide information on the pharmaceutical availability of MF from the various topical MF dosage forms. Subsequently, pharmaceutical equivalence was investigated from the comparative pharmaceutical availability data using statistical analysis. An additional objective was to attempt to correlate in vitro with in vivo data (IVIVC) to establish a model that could be used to assess safety and efficacy of generic topical drug products. The in vivo data obtained from the HSBA were processed according to the FDA requirements and these pharmacodynamic data were subsequently compared with the microdialysis and Franz cell results. In summary the objectives of this project were: 1. To develop a system to improve the reproducibility of the use of a Minolta® chromameter and compare this with the standard/normal manipulation and handling of such instruments. 2. To develop and validate an HPLC method for the analysis of MF for use with in vitro diffusion studies using microdialysis and Franz cells. 3. To conduct a comparative HSBA on proprietary MF topical creams from two different countries in accordance with the FDA guidance. 4. To assess the pharmaceutical equivalence of topical formulations containing MF using Franz diffusion cells and in vitro microdialysis. 5. To compare the in vivo data obtained from the HSBA with those obtained in vitro using microdialysis and Franz cells.
- Full Text:
- Date Issued: 2007
Evolving a secure grid-enabled, distributed data warehouse : a standards-based perspective
- Authors: Li, Xiao-Yu
- Date: 2007
- Subjects: Computational grids (Computer systems) , Computer networks -- Security measures , Electronic data processing -- Distributed processing
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9738 , http://hdl.handle.net/10948/544 , Computational grids (Computer systems) , Computer networks -- Security measures , Electronic data processing -- Distributed processing
- Description: As digital data-collection has increased in scale and number, it becomes an important type of resource serving a wide community of researchers. Cross-institutional data-sharing and collaboration introduce a suitable approach to facilitate those research institutions that are suffering the lack of data and related IT infrastructures. Grid computing has become a widely adopted approach to enable cross-institutional resource-sharing and collaboration. It integrates a distributed and heterogeneous collection of locally managed users and resources. This project proposes a distributed data warehouse system, which uses Grid technology to enable data-access and integration, and collaborative operations across multi-distributed institutions in the context of HV/AIDS research. This study is based on wider research into OGSA-based Grid services architecture, comprising a data-analysis system which utilizes a data warehouse, data marts, and near-line operational database that are hosted by distributed institutions. Within this framework, specific patterns for collaboration, interoperability, resource virtualization and security are included. The heterogeneous and dynamic nature of the Grid environment introduces a number of security challenges. This study also concerns a set of particular security aspects, including PKI-based authentication, single sign-on, dynamic delegation, and attribute-based authorization. These mechanisms, as supported by the Globus Toolkit’s Grid Security Infrastructure, are used to enable interoperability and establish trust relationship between various security mechanisms and policies within different institutions; manage credentials; and ensure secure interactions.
- Full Text:
- Date Issued: 2007
- Authors: Li, Xiao-Yu
- Date: 2007
- Subjects: Computational grids (Computer systems) , Computer networks -- Security measures , Electronic data processing -- Distributed processing
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9738 , http://hdl.handle.net/10948/544 , Computational grids (Computer systems) , Computer networks -- Security measures , Electronic data processing -- Distributed processing
- Description: As digital data-collection has increased in scale and number, it becomes an important type of resource serving a wide community of researchers. Cross-institutional data-sharing and collaboration introduce a suitable approach to facilitate those research institutions that are suffering the lack of data and related IT infrastructures. Grid computing has become a widely adopted approach to enable cross-institutional resource-sharing and collaboration. It integrates a distributed and heterogeneous collection of locally managed users and resources. This project proposes a distributed data warehouse system, which uses Grid technology to enable data-access and integration, and collaborative operations across multi-distributed institutions in the context of HV/AIDS research. This study is based on wider research into OGSA-based Grid services architecture, comprising a data-analysis system which utilizes a data warehouse, data marts, and near-line operational database that are hosted by distributed institutions. Within this framework, specific patterns for collaboration, interoperability, resource virtualization and security are included. The heterogeneous and dynamic nature of the Grid environment introduces a number of security challenges. This study also concerns a set of particular security aspects, including PKI-based authentication, single sign-on, dynamic delegation, and attribute-based authorization. These mechanisms, as supported by the Globus Toolkit’s Grid Security Infrastructure, are used to enable interoperability and establish trust relationship between various security mechanisms and policies within different institutions; manage credentials; and ensure secure interactions.
- Full Text:
- Date Issued: 2007
Experiences of parents whose children have completed a diversion programme
- Authors: Mankayi, Andile
- Date: 2007
- Subjects: Juvenile delinquents -- Rehabilitation -- South Africa -- Eastern Cape , Juvenile delinquents -- Family relationships -- South Africa -- Eastern Cape , Community-based corrections -- South Africa -- Eastern Cape , Youth -- Conduct of life , Social work with juvenile delinquents -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9986 , http://hdl.handle.net/10948/556 , Juvenile delinquents -- Rehabilitation -- South Africa -- Eastern Cape , Juvenile delinquents -- Family relationships -- South Africa -- Eastern Cape , Community-based corrections -- South Africa -- Eastern Cape , Youth -- Conduct of life , Social work with juvenile delinquents -- South Africa -- Eastern Cape
- Description: The goal of this research study was to explore and describe the experiences of parents whose children have completed the diversion programme in order to make recommendations to probation officers, social workers and people who facilitate the diversion programmes. The study focused on the Youth Empowerment Scheme programme (YES Programme) because it is the diversion programme mostly used in the Eastern Cape. The aim of the programme is to divert young people in trouble with the law away from the criminal justice system and to rehabilitate the young offenders by providing them with essential life skills that can address the offenders’ real problems. In the study the researcher made use of a qualitative research approach in an attempt to explore the experiences of parents whose children have completed the YES programme. The permission of the gatekeeper was sought before the study commenced. The researcher used purposive sampling to recruit participants. Data was collected by means of semi-structured interviews. In analysing the data, the researcher used the steps for qualitative data analysis as stated in Creswell (2003:192). Three main themes along with sub-themes and categories were identified during the process of data analysis. The main findings that emanated from this study were: the seemingly upcoming culture of lack of respect for authority on the part of the youth of today. Another major finding of this study is that the traditional function of families, notably, socialisation of young people within the family structure is on the wane. The recommendations that emanated from this study are: that the YES programme needs to be adjusted to address the specific needs of children that are referred to the YES programme and those of their families and communities. Family life should be strengthened through community development programmes that seek to address family problems of any nature, namely, material, psycho-social, economic, to mention just a few. Community development programmes should address fragile families through community development approaches that are comprehensive and integrated.
- Full Text:
- Date Issued: 2007
- Authors: Mankayi, Andile
- Date: 2007
- Subjects: Juvenile delinquents -- Rehabilitation -- South Africa -- Eastern Cape , Juvenile delinquents -- Family relationships -- South Africa -- Eastern Cape , Community-based corrections -- South Africa -- Eastern Cape , Youth -- Conduct of life , Social work with juvenile delinquents -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9986 , http://hdl.handle.net/10948/556 , Juvenile delinquents -- Rehabilitation -- South Africa -- Eastern Cape , Juvenile delinquents -- Family relationships -- South Africa -- Eastern Cape , Community-based corrections -- South Africa -- Eastern Cape , Youth -- Conduct of life , Social work with juvenile delinquents -- South Africa -- Eastern Cape
- Description: The goal of this research study was to explore and describe the experiences of parents whose children have completed the diversion programme in order to make recommendations to probation officers, social workers and people who facilitate the diversion programmes. The study focused on the Youth Empowerment Scheme programme (YES Programme) because it is the diversion programme mostly used in the Eastern Cape. The aim of the programme is to divert young people in trouble with the law away from the criminal justice system and to rehabilitate the young offenders by providing them with essential life skills that can address the offenders’ real problems. In the study the researcher made use of a qualitative research approach in an attempt to explore the experiences of parents whose children have completed the YES programme. The permission of the gatekeeper was sought before the study commenced. The researcher used purposive sampling to recruit participants. Data was collected by means of semi-structured interviews. In analysing the data, the researcher used the steps for qualitative data analysis as stated in Creswell (2003:192). Three main themes along with sub-themes and categories were identified during the process of data analysis. The main findings that emanated from this study were: the seemingly upcoming culture of lack of respect for authority on the part of the youth of today. Another major finding of this study is that the traditional function of families, notably, socialisation of young people within the family structure is on the wane. The recommendations that emanated from this study are: that the YES programme needs to be adjusted to address the specific needs of children that are referred to the YES programme and those of their families and communities. Family life should be strengthened through community development programmes that seek to address family problems of any nature, namely, material, psycho-social, economic, to mention just a few. Community development programmes should address fragile families through community development approaches that are comprehensive and integrated.
- Full Text:
- Date Issued: 2007
Exploring normal South African and British children: a comparative study utilizing the Griffiths Mental Development Scales- extended revised
- Authors: Van Heerden, Rivca
- Date: 2007
- Subjects: Psychological tests for children -- Cross-cultural studies , Children -- Intelligence testing -- Cross-cultural studies , Griffiths Scales of Mental Development
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9929 , http://hdl.handle.net/10948/629 , Psychological tests for children -- Cross-cultural studies , Children -- Intelligence testing -- Cross-cultural studies , Griffiths Scales of Mental Development
- Description: The health status of a substantial number of South African children can be classified as “children at risk” (Luiz, 1999) as the majority of children are influenced by factors such as poverty, poor living conditions and the HIV/AIDS epidemic. These are only some of the influences that contribute significantly to the health status of South African children and consequently their development. It can thus be argued that developmental assessment is imperative in the South African context. One of the most important reasons are that children with special needs in South Africa can be identified and given the opportunity to catch up developmentally and cope successfully as opposed to those who are identified much later (Foxcroft & Roodt, 2006). Furthermore, children in South Africa must begin Grade one in the year in which they turn seven. They may only enter grade one if the school has an opening and if the necessary evidence is provided to the Department of Education that the child will be able to cope with the demands of formal schooling (Department of Education, 2002). Developmental assessment measures therefore needs to be appropriate, accurate and informative in the modern South African context. The need for a measuring instrument to assess children’s overall development and thus their developmental readiness to cope with the demands of formal schooling could be satisfied by the Griffiths Mental Development Scales – Extended Revised (GMDS-ER). This recently revised measure has not been normed on a representative, contemporary South African sample. The purpose of the study was therefore to generate information on the applicability of British norms for the contemporary South African population. This study compared and explored the performance of South African and British children aged 5-years and 6-years on the Griffiths Mental Development Scales - Extended Revised (GMDS-ER). A contemporary South African sample was obtained by testing children between the ages of 5-years and 6-years on the GMDS-ER, whilst the British sample was drawn from the United Kingdom and Eire standardization sample. The British sample was screened for normality and a similar process was followed to establish normality for the South African sample. A matched simple frequency distribution technique (taking into account age, socioeconomic status and gender as variables) was employed to approximate the equivalence between the samples. The profiles were compared by conducting an independent sample t-test with subsequent post hoc analyses to explore potential differences in the performance of the two samples. The major findings of the present study were as follows: 1. There is a significant difference between the South African and British children’s overall developmental profiles (as measured by the GMDS-ER). 2. Generally, South African children performed better on the Locomotor subscale and the Personal Social Subscale (although not statistically significant), whilst British children performed statistically better on the Language, Eye and Hand Co-ordination, and Practical Reasoning Subscales. 3. No significant differences were found for the Performance Subscale which could indicate that South African and British children’s performances on this scale are similar. Further investigations into the applicability of the GMDS-ER for the contemporary South African context are recommended and the establishment of South African norms for clinical utilization is essential. Caution with regard to the utilization of the British–based norms in the South African context is final recommendations.
- Full Text:
- Date Issued: 2007
- Authors: Van Heerden, Rivca
- Date: 2007
- Subjects: Psychological tests for children -- Cross-cultural studies , Children -- Intelligence testing -- Cross-cultural studies , Griffiths Scales of Mental Development
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9929 , http://hdl.handle.net/10948/629 , Psychological tests for children -- Cross-cultural studies , Children -- Intelligence testing -- Cross-cultural studies , Griffiths Scales of Mental Development
- Description: The health status of a substantial number of South African children can be classified as “children at risk” (Luiz, 1999) as the majority of children are influenced by factors such as poverty, poor living conditions and the HIV/AIDS epidemic. These are only some of the influences that contribute significantly to the health status of South African children and consequently their development. It can thus be argued that developmental assessment is imperative in the South African context. One of the most important reasons are that children with special needs in South Africa can be identified and given the opportunity to catch up developmentally and cope successfully as opposed to those who are identified much later (Foxcroft & Roodt, 2006). Furthermore, children in South Africa must begin Grade one in the year in which they turn seven. They may only enter grade one if the school has an opening and if the necessary evidence is provided to the Department of Education that the child will be able to cope with the demands of formal schooling (Department of Education, 2002). Developmental assessment measures therefore needs to be appropriate, accurate and informative in the modern South African context. The need for a measuring instrument to assess children’s overall development and thus their developmental readiness to cope with the demands of formal schooling could be satisfied by the Griffiths Mental Development Scales – Extended Revised (GMDS-ER). This recently revised measure has not been normed on a representative, contemporary South African sample. The purpose of the study was therefore to generate information on the applicability of British norms for the contemporary South African population. This study compared and explored the performance of South African and British children aged 5-years and 6-years on the Griffiths Mental Development Scales - Extended Revised (GMDS-ER). A contemporary South African sample was obtained by testing children between the ages of 5-years and 6-years on the GMDS-ER, whilst the British sample was drawn from the United Kingdom and Eire standardization sample. The British sample was screened for normality and a similar process was followed to establish normality for the South African sample. A matched simple frequency distribution technique (taking into account age, socioeconomic status and gender as variables) was employed to approximate the equivalence between the samples. The profiles were compared by conducting an independent sample t-test with subsequent post hoc analyses to explore potential differences in the performance of the two samples. The major findings of the present study were as follows: 1. There is a significant difference between the South African and British children’s overall developmental profiles (as measured by the GMDS-ER). 2. Generally, South African children performed better on the Locomotor subscale and the Personal Social Subscale (although not statistically significant), whilst British children performed statistically better on the Language, Eye and Hand Co-ordination, and Practical Reasoning Subscales. 3. No significant differences were found for the Performance Subscale which could indicate that South African and British children’s performances on this scale are similar. Further investigations into the applicability of the GMDS-ER for the contemporary South African context are recommended and the establishment of South African norms for clinical utilization is essential. Caution with regard to the utilization of the British–based norms in the South African context is final recommendations.
- Full Text:
- Date Issued: 2007
Exploring opportunities and challenges for achieving the integration of indigenous knowledge systems into environmental education processes: a case study of the Sebakwe Environmental Education programme (SEEP) in Zimbabwe
- Authors: Zazu, Cryton
- Date: 2007
- Subjects: Sebekwane Environmental Education programme Ethnoscience -- Study and teaching -- Zimbabwe Environmental education -- Zimbabwe Mainstreaming in education -- Zimbabwe
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1540 , http://hdl.handle.net/10962/d1003422
- Description: The role and value of indigenous knowledge systems in enhancing and contextualizing education has long been recognized (UNESCO, 1978). Against this background a lot of research focusing on the documentation and study of the world’s indigenous knowledge systems, including those of Southern African countries was done. However, within the Southern African context much of this research did not translate into practical curriculum processes leaving educational processes de-contextualized (O’Donoghue, 2002; Mokuku, 2004; Shava, 2005). The linkages between the school, the home and the wider community remained weak (Taylor & Mulhall, 2001). The net effect of the limited integration of indigenous knowledge systems into mainstream environmental education processes has been that indigenous learners (such as those within the Sebakwe rural community) continued to get exposed to two different world views, the western scientific world view and the everyday life world views. The integration of indigenous knowledge systems into mainstream education such as the Sebakwe Environmental Education programme (SEEP) is one way of contextualizing education and improving its relevance to learners’ socio-cultural backgrounds. This research was conceptualized against such a context and seeks to explore the opportunities and challenges for the integration of indigenous knowledge systems into the Sebakwe Environmental Education programme. The ultimate purpose of this research is to contextualize SEEP both in its epistemology, and pedagogy. The research was designed and conducted within a qualitative interpretive case study methodology. The methodology involved a three-phased data collection method namely document analysis, focus group interviews and an inquiry-based workshop. The data was then analyzed and interpreted in relation to a set of theoretical perspectives. This research concluded that there is a possibility of integrating indigenous knowledge systems into the Sebakwe Environmental Education programme. Based on the findings the research came up with a list of recommendations to guide the process of working with indigenous knowledge within the Sebakwe Environmental Education programme.
- Full Text:
- Date Issued: 2007
- Authors: Zazu, Cryton
- Date: 2007
- Subjects: Sebekwane Environmental Education programme Ethnoscience -- Study and teaching -- Zimbabwe Environmental education -- Zimbabwe Mainstreaming in education -- Zimbabwe
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1540 , http://hdl.handle.net/10962/d1003422
- Description: The role and value of indigenous knowledge systems in enhancing and contextualizing education has long been recognized (UNESCO, 1978). Against this background a lot of research focusing on the documentation and study of the world’s indigenous knowledge systems, including those of Southern African countries was done. However, within the Southern African context much of this research did not translate into practical curriculum processes leaving educational processes de-contextualized (O’Donoghue, 2002; Mokuku, 2004; Shava, 2005). The linkages between the school, the home and the wider community remained weak (Taylor & Mulhall, 2001). The net effect of the limited integration of indigenous knowledge systems into mainstream environmental education processes has been that indigenous learners (such as those within the Sebakwe rural community) continued to get exposed to two different world views, the western scientific world view and the everyday life world views. The integration of indigenous knowledge systems into mainstream education such as the Sebakwe Environmental Education programme (SEEP) is one way of contextualizing education and improving its relevance to learners’ socio-cultural backgrounds. This research was conceptualized against such a context and seeks to explore the opportunities and challenges for the integration of indigenous knowledge systems into the Sebakwe Environmental Education programme. The ultimate purpose of this research is to contextualize SEEP both in its epistemology, and pedagogy. The research was designed and conducted within a qualitative interpretive case study methodology. The methodology involved a three-phased data collection method namely document analysis, focus group interviews and an inquiry-based workshop. The data was then analyzed and interpreted in relation to a set of theoretical perspectives. This research concluded that there is a possibility of integrating indigenous knowledge systems into the Sebakwe Environmental Education programme. Based on the findings the research came up with a list of recommendations to guide the process of working with indigenous knowledge within the Sebakwe Environmental Education programme.
- Full Text:
- Date Issued: 2007
Extending the reach of personal area networks by transporting Bluetooth communications over IP networks
- Authors: Mackie, David Sean
- Date: 2007 , 2007-03-29
- Subjects: Bluetooth technology , Communication -- Technological innovations , Communication -- Network analysis , TCP/IP (Computer network protocol) , Computer networks , Computer network protocols , Wireless communication systems
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4637 , http://hdl.handle.net/10962/d1006551 , Bluetooth technology , Communication -- Technological innovations , Communication -- Network analysis , TCP/IP (Computer network protocol) , Computer networks , Computer network protocols , Wireless communication systems
- Description: This thesis presents an investigation of how to extend the reach of a Bluetooth personal area network by introducing the concept of Bluetooth Hotspots. Currently two Bluetooth devices cannot communicate with each other unless they are within radio range, since Bluetooth is designed as a cable-replacement technology for wireless communications over short ranges. An investigation was done into the feasibility of creating Bluetooth hotspots that allow distant Bluetooth devices to communicate with each other by transporting their communications between these hotspots via an alternative network infrastructure such as an IP network. Two approaches were investigated, masquerading of remote devices by the local hotspot to allow seamless communications and proxying services on remote devices by providing them on a local hotspot using a distributed service discovery database. The latter approach was used to develop applications capable of transporting Bluetooth’s RFCOMM and L2CAP protocols. Quantitative tests were performed to establish the throughput performance and latency of these transport applications. Furthermore, a number of selected Bluetooth services were tested which lead us to conclude that most data-based protocols can be transported by the system.
- Full Text:
- Date Issued: 2007
- Authors: Mackie, David Sean
- Date: 2007 , 2007-03-29
- Subjects: Bluetooth technology , Communication -- Technological innovations , Communication -- Network analysis , TCP/IP (Computer network protocol) , Computer networks , Computer network protocols , Wireless communication systems
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4637 , http://hdl.handle.net/10962/d1006551 , Bluetooth technology , Communication -- Technological innovations , Communication -- Network analysis , TCP/IP (Computer network protocol) , Computer networks , Computer network protocols , Wireless communication systems
- Description: This thesis presents an investigation of how to extend the reach of a Bluetooth personal area network by introducing the concept of Bluetooth Hotspots. Currently two Bluetooth devices cannot communicate with each other unless they are within radio range, since Bluetooth is designed as a cable-replacement technology for wireless communications over short ranges. An investigation was done into the feasibility of creating Bluetooth hotspots that allow distant Bluetooth devices to communicate with each other by transporting their communications between these hotspots via an alternative network infrastructure such as an IP network. Two approaches were investigated, masquerading of remote devices by the local hotspot to allow seamless communications and proxying services on remote devices by providing them on a local hotspot using a distributed service discovery database. The latter approach was used to develop applications capable of transporting Bluetooth’s RFCOMM and L2CAP protocols. Quantitative tests were performed to establish the throughput performance and latency of these transport applications. Furthermore, a number of selected Bluetooth services were tested which lead us to conclude that most data-based protocols can be transported by the system.
- Full Text:
- Date Issued: 2007
Facets of human resource development on building female capacity in the African context : the case of Gqebera Township, Port Elizabeth
- Authors: Sydhagen, Kristine
- Date: 2007
- Subjects: Women in development -- South Africa -- Port Elizabeth , Women -- Employment , Manpower policy -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:16149 , http://hdl.handle.net/10948/614 , Women in development -- South Africa -- Port Elizabeth , Women -- Employment , Manpower policy -- South Africa -- Port Elizabeth
- Description: An empirical study of HRD, women, HIV and AIDS, and sustainable community development has been undertaken. Women make up approximately half of the population in the world. Taking this into account, there are many places where women do not have the same opportunities as their male counterparts. This is also true for most of Africa. Many people in Africa are deprived of basic education and often the majority of these are women. Even though the situation has improved for many girls and women in many areas, there is still a great deal that needs to be done in order to ensure equal opportunities for everyone within the labor market and society. In order to achieve this, it can be argued that sustainable development and sound human resource (HRD) policy implementation and strategies must be employed. HIV and AIDS damage society just as it does the human body: it begins by killing those parts responsible for building society: the women and breadwinners who sustain and look after the community as a whole. In this proposal, an outline of the structure of the dissertation will be given. The outline of four articles will be presented, as will the uniqueness and the similarities of the articles. For the purpose of this dissertation; different methodological research techniques will be employed according to the themes of the different articles in addition to the desired purpose of the research being conducted. Regarding the data collection, qualitative research will be used in the expectation of uncovering issues relating to women and HRD in Gqebera Township, Port Elizabeth, South Africa. The need for skills development and training in Sub-Saharan Africa is increasing in an area where unstable economies and high unemployment create challenges on many levels. Sub-Saharan Africa is faced with great poverty, skills migration, and HIV and AIDS, which are depleting the region of skilled workers in their prime working years. The region is facing numerous challenges in the development of skills and the ability to make use of the available human resources. It can be argued that the Sub-Saharan African region needs to increase the skilled labor pool and to develop communities. Perhaps most importantly, there is an urgent need for the region to face the impact of globalization on its own terms. This involves the fusion of African philosophy and management styles with the traditional Western theories with HRD strategies and policies that will be suitable for the developing economies in the region. Women in Africa face many difficult and complex situations in society, including difficulties entering the labor market. HIV and AIDS is a major challenge for South Africa and it brings people in the region much grief, sorrow and confusion as the rate of prevalence continues to rise. This article explores the social aspects of the HIV and AIDS pandemic in the communities and in the labor market and the extent to which women are affected on an individual, community and labor market level. HRD in relations to HIV and AIDS is examined in order to get an understanding of the role that HRD should play in the deprived South African communities that struggle to find resources to battle the social consequences of HIV and AIDS. An examination of feminist theory and HRD in Africa indicates the need to incorporate African feminism in the cause of advancing HRD theory. Because they are subject to multiple levels of discrimination, and because there are no country-specific policies to ensure their advancement, African women need to be protected from the patriarchal domination that prevails in the majority of African countries. Despite higher female involvement in African economies, they are denied opportunities and equal rights. If the development goals of Africa are to be achieved, HRD theory needs to incorporate both Western and African feminist theory, specifically related to gender inequalities that women experience in the realm of work. The level women’s understanding of sustainable development in Gqebera Township, South Africa is explored. Further the challenges and opportunities for sustainable HRD in the Sub-Saharan region is examined. Sub-Saharan African is facing numerous challenges including poverty, inequality, HIV and AIDS and high unemployment. All these factors are important to consider when planning HRD policies and strategies in the region. Sustainable development is a worldwide aim and on the agenda of many countries; especially the developing and least developed, the countries on the African continent. The conditions under and the degree to which women in Sub-Saharan Africa have been participating in the development process in the past have often not enabled them to fully develop their capacity in order to take part in the work towards sustainable development.
- Full Text:
- Date Issued: 2007
- Authors: Sydhagen, Kristine
- Date: 2007
- Subjects: Women in development -- South Africa -- Port Elizabeth , Women -- Employment , Manpower policy -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:16149 , http://hdl.handle.net/10948/614 , Women in development -- South Africa -- Port Elizabeth , Women -- Employment , Manpower policy -- South Africa -- Port Elizabeth
- Description: An empirical study of HRD, women, HIV and AIDS, and sustainable community development has been undertaken. Women make up approximately half of the population in the world. Taking this into account, there are many places where women do not have the same opportunities as their male counterparts. This is also true for most of Africa. Many people in Africa are deprived of basic education and often the majority of these are women. Even though the situation has improved for many girls and women in many areas, there is still a great deal that needs to be done in order to ensure equal opportunities for everyone within the labor market and society. In order to achieve this, it can be argued that sustainable development and sound human resource (HRD) policy implementation and strategies must be employed. HIV and AIDS damage society just as it does the human body: it begins by killing those parts responsible for building society: the women and breadwinners who sustain and look after the community as a whole. In this proposal, an outline of the structure of the dissertation will be given. The outline of four articles will be presented, as will the uniqueness and the similarities of the articles. For the purpose of this dissertation; different methodological research techniques will be employed according to the themes of the different articles in addition to the desired purpose of the research being conducted. Regarding the data collection, qualitative research will be used in the expectation of uncovering issues relating to women and HRD in Gqebera Township, Port Elizabeth, South Africa. The need for skills development and training in Sub-Saharan Africa is increasing in an area where unstable economies and high unemployment create challenges on many levels. Sub-Saharan Africa is faced with great poverty, skills migration, and HIV and AIDS, which are depleting the region of skilled workers in their prime working years. The region is facing numerous challenges in the development of skills and the ability to make use of the available human resources. It can be argued that the Sub-Saharan African region needs to increase the skilled labor pool and to develop communities. Perhaps most importantly, there is an urgent need for the region to face the impact of globalization on its own terms. This involves the fusion of African philosophy and management styles with the traditional Western theories with HRD strategies and policies that will be suitable for the developing economies in the region. Women in Africa face many difficult and complex situations in society, including difficulties entering the labor market. HIV and AIDS is a major challenge for South Africa and it brings people in the region much grief, sorrow and confusion as the rate of prevalence continues to rise. This article explores the social aspects of the HIV and AIDS pandemic in the communities and in the labor market and the extent to which women are affected on an individual, community and labor market level. HRD in relations to HIV and AIDS is examined in order to get an understanding of the role that HRD should play in the deprived South African communities that struggle to find resources to battle the social consequences of HIV and AIDS. An examination of feminist theory and HRD in Africa indicates the need to incorporate African feminism in the cause of advancing HRD theory. Because they are subject to multiple levels of discrimination, and because there are no country-specific policies to ensure their advancement, African women need to be protected from the patriarchal domination that prevails in the majority of African countries. Despite higher female involvement in African economies, they are denied opportunities and equal rights. If the development goals of Africa are to be achieved, HRD theory needs to incorporate both Western and African feminist theory, specifically related to gender inequalities that women experience in the realm of work. The level women’s understanding of sustainable development in Gqebera Township, South Africa is explored. Further the challenges and opportunities for sustainable HRD in the Sub-Saharan region is examined. Sub-Saharan African is facing numerous challenges including poverty, inequality, HIV and AIDS and high unemployment. All these factors are important to consider when planning HRD policies and strategies in the region. Sustainable development is a worldwide aim and on the agenda of many countries; especially the developing and least developed, the countries on the African continent. The conditions under and the degree to which women in Sub-Saharan Africa have been participating in the development process in the past have often not enabled them to fully develop their capacity in order to take part in the work towards sustainable development.
- Full Text:
- Date Issued: 2007