Chemical composition of leaf essential oils of Lantana camara varieties in South Africa and their effect on the behavioural preference of Falconia intermedia
- Authors: Ngxande-Koza, Samella W
- Date: 2017
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/4877 , vital:20739
- Description: Lantana camara L. (Verbenaceae) is one the most problematic invaders in South Africa invading forest edges, sand dunes, and shorelines by forming impenetrable thickets. Lantana camara invasions degrade natural biodiversity, reduce the value of land and consequently it has been a target for biological control, over the last 50 years in South Africa. Studies that have reported on chemical profile of Lantana camara have been conducted around the world but not in South Africa. Hence, the first aim of the current study was to identify the chemical baseline of L. camara varieties in the Eastern Cape, South Africa. Recent studies have shown that feeding by one of the agents released against L. camara, Falconia intermedia (Distant) (Hemiptera: Miridae), induces anti-herbivory response through increased leaf toughness and trichome density. A preliminary study conducted also reported the production of volatile chemicals by one variety, Whitney Farm, due to feeding by the mirids. Therefore, the second aim was to determine the induced changes in chemical compounds of L. camara varieties after feeding by F. intermedia. A third aim was to determine the effect these chemical compounds have on the behaviour of F. intermedia. To identify the chemical baseline of L. camara varieties, the essential oils of four L. camara varieties (East London, Port Alfred, Whitney Farm and Heather Glen) were analysed using gas chromatography mass spectrometry (GC-MS) and that resulted to the identification of 163 constitutive and 75 induced chemicals across the varieties tested. Lantana camara varieties showed different chemical classes but were highly dominated by terpenes. A great variation in the number of constitutive chemical compounds was found in all the varieties. There were 56 constitutive chemical compounds in the Whitney Farm variety, 41 in the East London variety, 36 in the Heather Glen variety and 30 in the Port Alfred variety. The Whitney Farm variety had the highest number (22) of unique constitutive chemicals identified when compared with other varieties. This indicates the chemical distinctiveness of the Whitney Farm variety from the other varieties. In the varieties tested, there were common chemical compounds identified in constitutive and induced (discussed below) states of the plants such as caryophyllene, hexane, naphthalene, copaene and a-caryophyllene. Besides naphthalene, the majority of chemical compounds in South African L. camara varieties were similar to compounds that have been identified across the world, suggesting that they are closely related. The expression of naphthalene in these varieties may be due to changes in the chemicals expressed over evolutionary time as predicted by the Novel Weapons Hypothesis. Amongst the varieties, a great variation in chemical compounds and their concentrations was shown in the induced states of the plants. The concentration of constitutive caryophyllene ranged from (3.13 - 15.7) %, to (4.02 - 11.10) % after feeding. The concentration of constitutive hexane ranged from (6.13 - 71.19) %, to (33.3 - 75.8) % after feeding. The concentration of constitutive naphthalene ranged from (0.21 - 4.79) %, to (0.92 - 2.11) % after feeding. The concentration of constitutive copaene ranged from (0.57 - 1.57) %, to (1.20 - 2.72) %. Lastly, the concentration of constitutive a-caryophyllene ranged from (1.18 - 9.03) %, to (0.78 - 5.48) % after feeding. The changes in chemical concentrations in lantana varieties indicated that feeding by the mirid on L. camara varieties causes an induction by either reducing or increasing the chemical concentrations. To determine the effect of the identified compounds on the behaviour of F. intermedia adults, olfactometer bioassays were conducted using a Y-tube technique. A significantly higher proportion of F. intermedia were attracted to undamaged leaves over damaged leaves and purified air. Undamaged leaves attracted 52 % of F. intermedia from the East London variety, 62.5 % from the Port Alfred variety, 56 % from the Whitney Farm variety, 58 % from the Lyndhurst variety and 54.5 % from the Heather Glen variety in dual choice trials versus damaged leaves. Furthermore, a significantly higher proportion of F. intermedia were attracted to damaged leaves over purified air. Damaged leaves attracted 67 % of F. intermedia from the East London variety, 67 % from the Port Alfred variety, 65.9 % from the Whitney Farm variety, 65.3 % from the Heather Glen variety and 64.5 % from the Lyndhurst variety. Olfactometer bioassays were also conducted using purified standard compounds of four chemical compounds identified from essential oils, hexane was used as a positive control as it is reported to be an insect attractant in literature. Hexane was highly attractive to the mirids compared to three standard compounds caryophyllene, caryophyllene oxide and naphthalene at the rate of 80 %, 73 % and 80 %, respectively. The standard compounds tested against F. intermedia are major compounds contained by L. camara varieties and they have proven to have a repellent effect. This may indicate that after feeding by F. intermedia, the major compounds expressed by the plant varieties repel F. intermedia contributing to the invasiveness of this weed. The increased expression of hexane and caryophyllene after feeding may also indicate increased attraction to some insects, opening up the potential for third trophic level interactions in varieties where this is the case. This is the first study on the chemical composition of essential oils of L. camara in South Africa. Therefore, we recommend that where appropriate chemical profile studies of the invasive alien plants should be considered during host specificity testing, and the vital role of chemical compounds on agent-weed interactions must be taken into consideration with other factors before and after the biological control agents are released.
- Full Text:
- Date Issued: 2017
- Authors: Ngxande-Koza, Samella W
- Date: 2017
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/4877 , vital:20739
- Description: Lantana camara L. (Verbenaceae) is one the most problematic invaders in South Africa invading forest edges, sand dunes, and shorelines by forming impenetrable thickets. Lantana camara invasions degrade natural biodiversity, reduce the value of land and consequently it has been a target for biological control, over the last 50 years in South Africa. Studies that have reported on chemical profile of Lantana camara have been conducted around the world but not in South Africa. Hence, the first aim of the current study was to identify the chemical baseline of L. camara varieties in the Eastern Cape, South Africa. Recent studies have shown that feeding by one of the agents released against L. camara, Falconia intermedia (Distant) (Hemiptera: Miridae), induces anti-herbivory response through increased leaf toughness and trichome density. A preliminary study conducted also reported the production of volatile chemicals by one variety, Whitney Farm, due to feeding by the mirids. Therefore, the second aim was to determine the induced changes in chemical compounds of L. camara varieties after feeding by F. intermedia. A third aim was to determine the effect these chemical compounds have on the behaviour of F. intermedia. To identify the chemical baseline of L. camara varieties, the essential oils of four L. camara varieties (East London, Port Alfred, Whitney Farm and Heather Glen) were analysed using gas chromatography mass spectrometry (GC-MS) and that resulted to the identification of 163 constitutive and 75 induced chemicals across the varieties tested. Lantana camara varieties showed different chemical classes but were highly dominated by terpenes. A great variation in the number of constitutive chemical compounds was found in all the varieties. There were 56 constitutive chemical compounds in the Whitney Farm variety, 41 in the East London variety, 36 in the Heather Glen variety and 30 in the Port Alfred variety. The Whitney Farm variety had the highest number (22) of unique constitutive chemicals identified when compared with other varieties. This indicates the chemical distinctiveness of the Whitney Farm variety from the other varieties. In the varieties tested, there were common chemical compounds identified in constitutive and induced (discussed below) states of the plants such as caryophyllene, hexane, naphthalene, copaene and a-caryophyllene. Besides naphthalene, the majority of chemical compounds in South African L. camara varieties were similar to compounds that have been identified across the world, suggesting that they are closely related. The expression of naphthalene in these varieties may be due to changes in the chemicals expressed over evolutionary time as predicted by the Novel Weapons Hypothesis. Amongst the varieties, a great variation in chemical compounds and their concentrations was shown in the induced states of the plants. The concentration of constitutive caryophyllene ranged from (3.13 - 15.7) %, to (4.02 - 11.10) % after feeding. The concentration of constitutive hexane ranged from (6.13 - 71.19) %, to (33.3 - 75.8) % after feeding. The concentration of constitutive naphthalene ranged from (0.21 - 4.79) %, to (0.92 - 2.11) % after feeding. The concentration of constitutive copaene ranged from (0.57 - 1.57) %, to (1.20 - 2.72) %. Lastly, the concentration of constitutive a-caryophyllene ranged from (1.18 - 9.03) %, to (0.78 - 5.48) % after feeding. The changes in chemical concentrations in lantana varieties indicated that feeding by the mirid on L. camara varieties causes an induction by either reducing or increasing the chemical concentrations. To determine the effect of the identified compounds on the behaviour of F. intermedia adults, olfactometer bioassays were conducted using a Y-tube technique. A significantly higher proportion of F. intermedia were attracted to undamaged leaves over damaged leaves and purified air. Undamaged leaves attracted 52 % of F. intermedia from the East London variety, 62.5 % from the Port Alfred variety, 56 % from the Whitney Farm variety, 58 % from the Lyndhurst variety and 54.5 % from the Heather Glen variety in dual choice trials versus damaged leaves. Furthermore, a significantly higher proportion of F. intermedia were attracted to damaged leaves over purified air. Damaged leaves attracted 67 % of F. intermedia from the East London variety, 67 % from the Port Alfred variety, 65.9 % from the Whitney Farm variety, 65.3 % from the Heather Glen variety and 64.5 % from the Lyndhurst variety. Olfactometer bioassays were also conducted using purified standard compounds of four chemical compounds identified from essential oils, hexane was used as a positive control as it is reported to be an insect attractant in literature. Hexane was highly attractive to the mirids compared to three standard compounds caryophyllene, caryophyllene oxide and naphthalene at the rate of 80 %, 73 % and 80 %, respectively. The standard compounds tested against F. intermedia are major compounds contained by L. camara varieties and they have proven to have a repellent effect. This may indicate that after feeding by F. intermedia, the major compounds expressed by the plant varieties repel F. intermedia contributing to the invasiveness of this weed. The increased expression of hexane and caryophyllene after feeding may also indicate increased attraction to some insects, opening up the potential for third trophic level interactions in varieties where this is the case. This is the first study on the chemical composition of essential oils of L. camara in South Africa. Therefore, we recommend that where appropriate chemical profile studies of the invasive alien plants should be considered during host specificity testing, and the vital role of chemical compounds on agent-weed interactions must be taken into consideration with other factors before and after the biological control agents are released.
- Full Text:
- Date Issued: 2017
Perceptions of indigenous people regarding mental illness at Cacadu District in the Eastern Cape Province of South Africa
- Authors: Tilolo, Lwazi Romeo
- Date: 2015
- Subjects: Indigenous peoples -- Mental health -- South Africa -- Eastern Cape Cultural psychiatry -- South Africa -- Eastern Cape Healers -- South Africa -- Eastern Cape , Ethnopsychology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2677 , vital:27983
- Description: Indigenous people tend to consult traditional healers when a family member manifests change in behaviour, whilst conventional treatment disregards spirituality when preserving mental health. The aim of the study was to explore the perceptions of indigenous people and the role of traditional healers in the management of mentally ill persons within the Cacadu District in the Eastern Cape Province of South Africa. The study has adopted a qualitative approach which was exploratory and descriptive in nature. The sample consisted of nine relatives of mental health care users (MHCUs) and six traditional healers. Ethical principles were also taken into consideration by the researcher during the process of conducting the study. Data were collected from two strata, namely, relatives of the MHCUs and the traditional healers and an interview guide was used to conduct in-depth face-to-face interviews. Data were analysed using Tesch’s method of data analysis. Four themes emerged from the data categories and sub categories were identified. According to the themes participants indicated the negative impact of mental illness; as a result they portrayed great desperation regarding the means of accessing a cure for mental illness. Some participants showed insufficient knowledge regarding mental illness and had different perceptions and beliefs regarding the origin of mental illness. Available literature was used to emphasise and support the views that were expressed by both traditional healers and relatives of MHCUs. It has been highlighted from this study that indigenous people of Cacadu District view mental illness as spiritual in origin but they include Western medication for the benefit of the mentally ill. In addition, the relatives of the MHCUs highlighted the economic burden as the major problem that results from mental illness.
- Full Text:
- Date Issued: 2015
- Authors: Tilolo, Lwazi Romeo
- Date: 2015
- Subjects: Indigenous peoples -- Mental health -- South Africa -- Eastern Cape Cultural psychiatry -- South Africa -- Eastern Cape Healers -- South Africa -- Eastern Cape , Ethnopsychology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2677 , vital:27983
- Description: Indigenous people tend to consult traditional healers when a family member manifests change in behaviour, whilst conventional treatment disregards spirituality when preserving mental health. The aim of the study was to explore the perceptions of indigenous people and the role of traditional healers in the management of mentally ill persons within the Cacadu District in the Eastern Cape Province of South Africa. The study has adopted a qualitative approach which was exploratory and descriptive in nature. The sample consisted of nine relatives of mental health care users (MHCUs) and six traditional healers. Ethical principles were also taken into consideration by the researcher during the process of conducting the study. Data were collected from two strata, namely, relatives of the MHCUs and the traditional healers and an interview guide was used to conduct in-depth face-to-face interviews. Data were analysed using Tesch’s method of data analysis. Four themes emerged from the data categories and sub categories were identified. According to the themes participants indicated the negative impact of mental illness; as a result they portrayed great desperation regarding the means of accessing a cure for mental illness. Some participants showed insufficient knowledge regarding mental illness and had different perceptions and beliefs regarding the origin of mental illness. Available literature was used to emphasise and support the views that were expressed by both traditional healers and relatives of MHCUs. It has been highlighted from this study that indigenous people of Cacadu District view mental illness as spiritual in origin but they include Western medication for the benefit of the mentally ill. In addition, the relatives of the MHCUs highlighted the economic burden as the major problem that results from mental illness.
- Full Text:
- Date Issued: 2015
Can sport impact rational investor behaviour? : an evaluation of the impact of national sporting performance on stock market returns in South Africa
- Authors: De Beer, Carl Francois
- Date: 2012
- Subjects: Investments -- Psychological aspects -- Research -- South Africa Finance -- Psychological aspects -- Research -- South Africa Sports -- Economic aspects -- Research -- South Africa Sports -- Psychological aspects -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MEcon
- Identifier: vital:1013 , http://hdl.handle.net/10962/d1002748
- Description: The finance industry is an extremely fast and complex world dominated by the Efficient Markets Hypothesis (EMH). This theory contains many assumptions which include that investors are rational utility maximisers and that market prices reflect all relevant economic information available to the public. However, over the years, a new form of financial literature known as behavioural finance has been gaining momentum. Behavioural finance seeks to bridge the gap between psychology and economics in an attempt to gain a better understanding of how markets react to different situations. Behavioural finance has also gained much attention in recent years due to the EMH’s inability to explain many economic anomalies. This study first considers the differences between behavioural finance theory and EMH theory before explaining how an individual’s mood has the ability to influence one’s risk taking preferences. Mood changes were also found to be linked to changes in the way an individual reacts to different situations, the way they thinks and processes thoughts. Negative events were also found to have a greater influence on an individual’s mood than positive events did, resulting in an asymmetric relationship between positive and negative results. This study then examines numerous studies indicating how non-economic events can have a statistical and significant influence on stock market returns before analysing previous literature where sport was found to influence market prices. The aim of this study is to determine if South African national sporting performance can influence investors in such a way that it has the ability to impact on market returns. Using standard event study methodology, this study determines the constant mean return using the daily All-Share price index on the JSE for the period of 1 January 1990 to 31 December 2010. This study focuses on three of South Africa’s most popular sports, namely soccer, cricket and rugby and examine if these three sports have the ability to influence market returns. Although there is some evidence of a relationship between stock returns and sporting performance in the descriptive analysis, the regression results indicate that sporting performance in South Africa does not significantly explain abnormal market returns on the JSE. The study provides a number of possible reasons for this finding and concludes by suggesting areas for future research.
- Full Text:
- Date Issued: 2012
- Authors: De Beer, Carl Francois
- Date: 2012
- Subjects: Investments -- Psychological aspects -- Research -- South Africa Finance -- Psychological aspects -- Research -- South Africa Sports -- Economic aspects -- Research -- South Africa Sports -- Psychological aspects -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MEcon
- Identifier: vital:1013 , http://hdl.handle.net/10962/d1002748
- Description: The finance industry is an extremely fast and complex world dominated by the Efficient Markets Hypothesis (EMH). This theory contains many assumptions which include that investors are rational utility maximisers and that market prices reflect all relevant economic information available to the public. However, over the years, a new form of financial literature known as behavioural finance has been gaining momentum. Behavioural finance seeks to bridge the gap between psychology and economics in an attempt to gain a better understanding of how markets react to different situations. Behavioural finance has also gained much attention in recent years due to the EMH’s inability to explain many economic anomalies. This study first considers the differences between behavioural finance theory and EMH theory before explaining how an individual’s mood has the ability to influence one’s risk taking preferences. Mood changes were also found to be linked to changes in the way an individual reacts to different situations, the way they thinks and processes thoughts. Negative events were also found to have a greater influence on an individual’s mood than positive events did, resulting in an asymmetric relationship between positive and negative results. This study then examines numerous studies indicating how non-economic events can have a statistical and significant influence on stock market returns before analysing previous literature where sport was found to influence market prices. The aim of this study is to determine if South African national sporting performance can influence investors in such a way that it has the ability to impact on market returns. Using standard event study methodology, this study determines the constant mean return using the daily All-Share price index on the JSE for the period of 1 January 1990 to 31 December 2010. This study focuses on three of South Africa’s most popular sports, namely soccer, cricket and rugby and examine if these three sports have the ability to influence market returns. Although there is some evidence of a relationship between stock returns and sporting performance in the descriptive analysis, the regression results indicate that sporting performance in South Africa does not significantly explain abnormal market returns on the JSE. The study provides a number of possible reasons for this finding and concludes by suggesting areas for future research.
- Full Text:
- Date Issued: 2012
A critical analysis of the importance of oracy in the classroom, with particular reference to secondary schools in the Cape Education Department
- Authors: Malherbe, Neil
- Date: 1995
- Subjects: Communication in education Verbal behavior Oral communication Discussion -- Study and teaching Classroom management
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1474 , http://hdl.handle.net/10962/d1003355
- Description: In the past thirty years, oracy has received prominence as a means to enhance teaching styles and assist with learning. Much of what has been written in this field has been by those interested in a 'language across the curriculum' approach, such as Barnes (1969) who developed the terms 'exploratory talk' and 'final draft talk'. The linguist, M.A.K. Halliday {1989} and others have suggested that the teacher's approach should be to encourage what he terms 'heuristic talk' i.e. relatively unstructured exploratory language used by the pupils in talking towards an understanding of a concept. It is more evident in certain school subjects that pupils may have difficulty in understanding abstract or complex concepts. In this regard, English, mathematics and physical science were selected for the purpose of this study, as each has its own metalanguage, specific to that subject. It is presumed that some pupils may find difficulty in these subjects because of the subject-specific language inherent in each. This work explores whether a programme of increased oracy alleviates some of these problems and it makes recommendations for the implementation of such a programme. The period involved for the purpose of this study was five weeks, during which teachers of three selected classes presented lessons in such a way that oral work was stressed. At the completion of this programme, a test was written for comparison with past experiences. Pupils answered a comprehensive questionnaire and staff involved were interviewed; the results of this feedback, in conjunction with what has been written by others in this field, forms the basis for this work. The primary recommendation emerging from this and other studies is that a shift away from a teacher-/ and textbook-dominated approach is necessary. Pupils need to contextualise knowledge in their own terms. One important way of accomplishing this is by affording them theopportunity to interact orally with each other and with the teacher.
- Full Text:
- Date Issued: 1995
- Authors: Malherbe, Neil
- Date: 1995
- Subjects: Communication in education Verbal behavior Oral communication Discussion -- Study and teaching Classroom management
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1474 , http://hdl.handle.net/10962/d1003355
- Description: In the past thirty years, oracy has received prominence as a means to enhance teaching styles and assist with learning. Much of what has been written in this field has been by those interested in a 'language across the curriculum' approach, such as Barnes (1969) who developed the terms 'exploratory talk' and 'final draft talk'. The linguist, M.A.K. Halliday {1989} and others have suggested that the teacher's approach should be to encourage what he terms 'heuristic talk' i.e. relatively unstructured exploratory language used by the pupils in talking towards an understanding of a concept. It is more evident in certain school subjects that pupils may have difficulty in understanding abstract or complex concepts. In this regard, English, mathematics and physical science were selected for the purpose of this study, as each has its own metalanguage, specific to that subject. It is presumed that some pupils may find difficulty in these subjects because of the subject-specific language inherent in each. This work explores whether a programme of increased oracy alleviates some of these problems and it makes recommendations for the implementation of such a programme. The period involved for the purpose of this study was five weeks, during which teachers of three selected classes presented lessons in such a way that oral work was stressed. At the completion of this programme, a test was written for comparison with past experiences. Pupils answered a comprehensive questionnaire and staff involved were interviewed; the results of this feedback, in conjunction with what has been written by others in this field, forms the basis for this work. The primary recommendation emerging from this and other studies is that a shift away from a teacher-/ and textbook-dominated approach is necessary. Pupils need to contextualise knowledge in their own terms. One important way of accomplishing this is by affording them theopportunity to interact orally with each other and with the teacher.
- Full Text:
- Date Issued: 1995
Investigating the parallels between disciplinary/bio-power and cyber-corporate empire
- Authors: Taljaard, Darren
- Date: 2012
- Subjects: Foucault, Michel, 1926-1984 , Discourse analysis , Disciplinary power
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8436 , http://hdl.handle.net/10948/d1021023
- Description: Strong parallels exist between the formation of subjectivity through the disciplinary/bio-power technologies of the 18th/19th centuries – which Michel Foucault identified in his books Discipline and Punish: The Birth of the Prison, and The History of Sexuality Volume 1: The Will to Knowledge – and the 20th/21st century formation of subjectivity effected through Apple. Inc and Google. Inc operating systems and products. These systems and products similarly serve to canalize and ‗discipline‘ the pursuit and exchange of information, in a way that is constitutive of a new cyber-variant of disciplinary/bio-power subjectivity.
- Full Text:
- Date Issued: 2012
- Authors: Taljaard, Darren
- Date: 2012
- Subjects: Foucault, Michel, 1926-1984 , Discourse analysis , Disciplinary power
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8436 , http://hdl.handle.net/10948/d1021023
- Description: Strong parallels exist between the formation of subjectivity through the disciplinary/bio-power technologies of the 18th/19th centuries – which Michel Foucault identified in his books Discipline and Punish: The Birth of the Prison, and The History of Sexuality Volume 1: The Will to Knowledge – and the 20th/21st century formation of subjectivity effected through Apple. Inc and Google. Inc operating systems and products. These systems and products similarly serve to canalize and ‗discipline‘ the pursuit and exchange of information, in a way that is constitutive of a new cyber-variant of disciplinary/bio-power subjectivity.
- Full Text:
- Date Issued: 2012
The career maturity of the gifted and talented pupil
- Authors: Rainier, Markseller Garrett
- Date: 1984
- Subjects: Gifted children--Psychology Counseling in vocational education
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1371 , http://hdl.handle.net/10962/d1001437
- Description: In 1980 the cape Education Department launched a Gifted and Talented programme in some schools which was intended to enrich the educational experience of the more able pupils. Numerous studies have shown these pupils to have a higher level of career maturity than non-gifted pupils, but the studies have also shown that these pupils face unique career- development problems. Gifted and Talented pupils constitute an important source of manpower and their potential contribution to the total society is great. Consequently they are in need of effective career guidance to help them overcome their unique problems and realize their potential. This study set out to discover if the career maturity of a group of Standard 9 Gifted and Talented pupils, identified according to the original Cape Education Department criteria, is indeed higher than that of their peers and to make recommendations for facilitating career education among these pupils. Contrary to expectations the Gifted and Talented pupils did not show significantly higher levels of career maturity than their peers, as measured on the Attitude Scale of Crites ' Career Maturity Inventory. Compared with the American norms , the scores obtained by the research population were unfavourable. The validity of the I .Q. scores used and the criteria for identification of Gifted and Talented pupils are seen as questionable which could have led to an inaccurate grouping of the pupils as Gifted and Talented or non- gifted. Recommendations are made for a basic career education programme for all pupils which would include periods of active work experience. Recommendations for additional career education for those currently classified as Gifted and Talented pupils are also made, so as to allow these pupils additional time for self- development, decisionmaking and dealing with their unique life situation
- Full Text:
- Date Issued: 1984
- Authors: Rainier, Markseller Garrett
- Date: 1984
- Subjects: Gifted children--Psychology Counseling in vocational education
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1371 , http://hdl.handle.net/10962/d1001437
- Description: In 1980 the cape Education Department launched a Gifted and Talented programme in some schools which was intended to enrich the educational experience of the more able pupils. Numerous studies have shown these pupils to have a higher level of career maturity than non-gifted pupils, but the studies have also shown that these pupils face unique career- development problems. Gifted and Talented pupils constitute an important source of manpower and their potential contribution to the total society is great. Consequently they are in need of effective career guidance to help them overcome their unique problems and realize their potential. This study set out to discover if the career maturity of a group of Standard 9 Gifted and Talented pupils, identified according to the original Cape Education Department criteria, is indeed higher than that of their peers and to make recommendations for facilitating career education among these pupils. Contrary to expectations the Gifted and Talented pupils did not show significantly higher levels of career maturity than their peers, as measured on the Attitude Scale of Crites ' Career Maturity Inventory. Compared with the American norms , the scores obtained by the research population were unfavourable. The validity of the I .Q. scores used and the criteria for identification of Gifted and Talented pupils are seen as questionable which could have led to an inaccurate grouping of the pupils as Gifted and Talented or non- gifted. Recommendations are made for a basic career education programme for all pupils which would include periods of active work experience. Recommendations for additional career education for those currently classified as Gifted and Talented pupils are also made, so as to allow these pupils additional time for self- development, decisionmaking and dealing with their unique life situation
- Full Text:
- Date Issued: 1984
Comparative analysis of zero-tillage and conventional tillage practices in the Amahlathi local municipality of the Eastern Cape province of South Africa
- Authors: Gomo, Zintle
- Date: 2017
- Subjects: Tillage--South Africa--Eastern Cape Farms, Small--South Africa--Eastern Cape No-tillage--South Africa--Eastern Cape
- Language: English
- Type: Thesis , Masters , Agricultural Economics
- Identifier: http://hdl.handle.net/10353/11586 , vital:39087
- Description: The current interest in zero tillage/no-till technologies is a result of the need to reduce excessive land degradation in most crop producing areas as well as to enhance sustainable food production. Farmers are always looking for ways to increase yields and profits and zero-tillage may be a way to achieve this goal. However, a systematic comparative study of the performance of zero-tillage and conventional tillage within the former homeland areas of the Eastern Cape Province is lacking. The broad objective of the study is to comparatively analyze zero tillage and conventional tillage and to determine which practice is more beneficial for the land and farmers in the area. Specifically, the study investigated the relative performance of Zero-tillage and conventional–tillage in terms of quantity produced per farm and per hectare, factors influencing the adoption rate of zero tillage and conventional tillage and to determine the relative impact of zero-tillage and conventional tillage on household income. The study was carried out in Amahlathi Local Municipality in the Eastern Cape Province and employed survey data obtained from 100 respondents using conventional tillage and zero tillage farmers growing spinach, cabbage, beetroot, maize, and potatoes. The study employed a cross-sectional research design. A multistage stratified sampling procedure was used in which the first stage involved selecting respondents from Amahlathi Local Municipally. This was followed by the selection of villages and then the respondents. This was done through stratification of smallholder farmers from the different Villages. This was followed by random sampling which was used to get the sample size for the study. Stata and SPSS were used to analyze the data. Descriptive statistics was used to examine current farming practices in the Eastern Cape Province while Propensity Score Matching was employed to estimate the factors that had an impact on zero tillage adoption as well as the relative impact of zero tillage and conventional tillage on household income. Gross margin analysis was used to estimate profitability of zero tillage and conventional. female farmers are participating more in zero tillage with 63.8percent while males are dominating the conventional tillage with 51.6percent. These results show that females play a crucial role in decision making when it comes to agriculture and adoption of new agricultural technologies. The majority of the farmers involved in the study were young farmers with 58percent from zero tillage and 42percent practically involved in conventional tillage. Moreover, the study showed that 41percent of the respondents practising ZT were married, and about 39percent of the respondents practising conventional tillage were married. The marital status of the respondents suggested that zero-tillage farmers were relatively stable in their farming activities as compared to conventional tillage. The results presented that 52.2percent of the respondents who practised zero tillage were better educated than the 48.4percent of the respondents practising conventional tillage. The respondents that were specialising in zero-tillage, about 41% relied on farming, 6% relied on salaried income and 54percent relied on social grants. On the other hand, respondents that were specialising in conventional tillage about, 26percent relied on farming, 16percent relied on salaried income, while 58percent relied on social grants. The respondents that were specialising in zero-tillage, about 28percent used communal land, 1percent used own land and 71percent used family land. On the other hand, respondents that were specialising in conventional tillage about, 42percent used communal land, 7percent use own land and 52percent used family land. The average household size for both groups of farmers is 5 people per household. Household income distribution for conventional tillage is giving the farmers an average of R3187.10 income while the zero tillage is giving them an income of R2305.80 on average. The study revealed that the landholdings for conventional tillage agriculture tend to be more (1.77 ha) compared to zero tillage (0.79 ha) agriculture. The Propensity Score Matching results indicated that participation in smallholder zero tillage farming contributes to household income. This implies that participating in zero tillage farming can contribute to rural livelihoods, increased income and production yields. The study results showed that households chose different farming systems based on their knowledge, level of education and farming experiences. The gross margin results show that conventional tillage farming households generated more income than zero tillage farming households. Farmers who were involved in conventional tillage farming were complaining that yields and income have decreased with time and they are continuing to decrease while farmers who carried out zero tillage farming indicated that their yields and income have improved considerably and continue to increase with time. Thus, support for adopting and implementing zero tillage practices can be an important factor for improving incomes for rural households. Based on the findings highlighted above, the study recommends provision of farm inputs and continuation of government support with more emphasis on strengthening access to inputs and technical assistance. There is a need for support programmes that would help to motivate farmers for better performance. The programmes include infrastructure developments, research and extension activities.
- Full Text:
- Date Issued: 2017
- Authors: Gomo, Zintle
- Date: 2017
- Subjects: Tillage--South Africa--Eastern Cape Farms, Small--South Africa--Eastern Cape No-tillage--South Africa--Eastern Cape
- Language: English
- Type: Thesis , Masters , Agricultural Economics
- Identifier: http://hdl.handle.net/10353/11586 , vital:39087
- Description: The current interest in zero tillage/no-till technologies is a result of the need to reduce excessive land degradation in most crop producing areas as well as to enhance sustainable food production. Farmers are always looking for ways to increase yields and profits and zero-tillage may be a way to achieve this goal. However, a systematic comparative study of the performance of zero-tillage and conventional tillage within the former homeland areas of the Eastern Cape Province is lacking. The broad objective of the study is to comparatively analyze zero tillage and conventional tillage and to determine which practice is more beneficial for the land and farmers in the area. Specifically, the study investigated the relative performance of Zero-tillage and conventional–tillage in terms of quantity produced per farm and per hectare, factors influencing the adoption rate of zero tillage and conventional tillage and to determine the relative impact of zero-tillage and conventional tillage on household income. The study was carried out in Amahlathi Local Municipality in the Eastern Cape Province and employed survey data obtained from 100 respondents using conventional tillage and zero tillage farmers growing spinach, cabbage, beetroot, maize, and potatoes. The study employed a cross-sectional research design. A multistage stratified sampling procedure was used in which the first stage involved selecting respondents from Amahlathi Local Municipally. This was followed by the selection of villages and then the respondents. This was done through stratification of smallholder farmers from the different Villages. This was followed by random sampling which was used to get the sample size for the study. Stata and SPSS were used to analyze the data. Descriptive statistics was used to examine current farming practices in the Eastern Cape Province while Propensity Score Matching was employed to estimate the factors that had an impact on zero tillage adoption as well as the relative impact of zero tillage and conventional tillage on household income. Gross margin analysis was used to estimate profitability of zero tillage and conventional. female farmers are participating more in zero tillage with 63.8percent while males are dominating the conventional tillage with 51.6percent. These results show that females play a crucial role in decision making when it comes to agriculture and adoption of new agricultural technologies. The majority of the farmers involved in the study were young farmers with 58percent from zero tillage and 42percent practically involved in conventional tillage. Moreover, the study showed that 41percent of the respondents practising ZT were married, and about 39percent of the respondents practising conventional tillage were married. The marital status of the respondents suggested that zero-tillage farmers were relatively stable in their farming activities as compared to conventional tillage. The results presented that 52.2percent of the respondents who practised zero tillage were better educated than the 48.4percent of the respondents practising conventional tillage. The respondents that were specialising in zero-tillage, about 41% relied on farming, 6% relied on salaried income and 54percent relied on social grants. On the other hand, respondents that were specialising in conventional tillage about, 26percent relied on farming, 16percent relied on salaried income, while 58percent relied on social grants. The respondents that were specialising in zero-tillage, about 28percent used communal land, 1percent used own land and 71percent used family land. On the other hand, respondents that were specialising in conventional tillage about, 42percent used communal land, 7percent use own land and 52percent used family land. The average household size for both groups of farmers is 5 people per household. Household income distribution for conventional tillage is giving the farmers an average of R3187.10 income while the zero tillage is giving them an income of R2305.80 on average. The study revealed that the landholdings for conventional tillage agriculture tend to be more (1.77 ha) compared to zero tillage (0.79 ha) agriculture. The Propensity Score Matching results indicated that participation in smallholder zero tillage farming contributes to household income. This implies that participating in zero tillage farming can contribute to rural livelihoods, increased income and production yields. The study results showed that households chose different farming systems based on their knowledge, level of education and farming experiences. The gross margin results show that conventional tillage farming households generated more income than zero tillage farming households. Farmers who were involved in conventional tillage farming were complaining that yields and income have decreased with time and they are continuing to decrease while farmers who carried out zero tillage farming indicated that their yields and income have improved considerably and continue to increase with time. Thus, support for adopting and implementing zero tillage practices can be an important factor for improving incomes for rural households. Based on the findings highlighted above, the study recommends provision of farm inputs and continuation of government support with more emphasis on strengthening access to inputs and technical assistance. There is a need for support programmes that would help to motivate farmers for better performance. The programmes include infrastructure developments, research and extension activities.
- Full Text:
- Date Issued: 2017
An analysis of barriers which affect women in leadership positions in Eastern Cape Municipalities : case study of Amathole District Municipality
- Authors: Nyangiwe-Ndika, Welekazi
- Date: 2015
- Subjects: Leadership in women -- South Africa -- Eastern Cape Sex discrimination against women -- South Africa -- Eastern Cape Women executives -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/2049 , vital:27601
- Description: The primary concern of the study is to examine leadership challenges confronted by women leaders in Eastern Cape municipalities. International organisations has made a number commitments encouraging gender parity and eliminating imbalance against women in the past three decades, through international platforms. In the World Summit held in 2005, it was recommended that a Platform for Action (1995) and the resolutions of the Twenty Third special session of the General Assembly as a crucial baseline in attaining then internationally agreed development goals, as well as those contained in the Millennium Declaration. (www.ilo.org) In the above forums national decision makers worldwide were urged to apply strategies and programmes which would improve gender fairness, in leadership positions, giving women complete and comparable share in economic, social, cultural and political decision-making as men. South Africa as a role player in the international space also joined the world in endorsing various programmes and strategies which seek to address gender parities and strive to eliminate women oppression especially in public sector.
- Full Text:
- Date Issued: 2015
- Authors: Nyangiwe-Ndika, Welekazi
- Date: 2015
- Subjects: Leadership in women -- South Africa -- Eastern Cape Sex discrimination against women -- South Africa -- Eastern Cape Women executives -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/2049 , vital:27601
- Description: The primary concern of the study is to examine leadership challenges confronted by women leaders in Eastern Cape municipalities. International organisations has made a number commitments encouraging gender parity and eliminating imbalance against women in the past three decades, through international platforms. In the World Summit held in 2005, it was recommended that a Platform for Action (1995) and the resolutions of the Twenty Third special session of the General Assembly as a crucial baseline in attaining then internationally agreed development goals, as well as those contained in the Millennium Declaration. (www.ilo.org) In the above forums national decision makers worldwide were urged to apply strategies and programmes which would improve gender fairness, in leadership positions, giving women complete and comparable share in economic, social, cultural and political decision-making as men. South Africa as a role player in the international space also joined the world in endorsing various programmes and strategies which seek to address gender parities and strive to eliminate women oppression especially in public sector.
- Full Text:
- Date Issued: 2015
Assessment of the effect of the down-referral chronic medication distribution system on patients' adherence to chronic medication in the Buffalo City sub-district
- Authors: Ndwandwe, Miriam
- Date: 2018
- Subjects: Health services accessibility Pharmacology Patient compliance
- Language: English
- Type: Thesis , Masters , MPH
- Identifier: http://hdl.handle.net/10353/13248 , vital:39626
- Description: The purpose of the study is to determine the effect of the down referral chronic medication distribution system on patient's adherence to chronic medicine in Buffalo City sub - district by ensuring that chronic patients receive their correct medication on time and in correct quantities every month so that they can take the medication as recommended by the health professional. Adherence to chronic medication lead to better health outcome and reduced hospital re-admission. A non-experimental and descriptive quantitative research methodology was used. A data abstraction form developed by the researcher was used to record data from the medical records of chronically ill patients. The results of the study revealed that most of the chronically ill patients who were admitted to hospital were not adherent to their chronic medication. Patients are non-adherent even if they have chronic medication with them. This was evident in the number of patients who do not remember how many days did they not take their treatment. Others indicated that they share their medication with other family members who suffer from the same chronic condition. The patients' lack of understanding of their chronic condition and the consequences of not taking medication as instructed by the health professional contribute to non-adherence. Strengthening of health promotion programmes to educate the patients about their chronic condition would improve adherence. Most of the chronic conditions are life-style modifiable diseases. Patients must be educated about the changes they can make to improve their quality of life.
- Full Text:
- Date Issued: 2018
- Authors: Ndwandwe, Miriam
- Date: 2018
- Subjects: Health services accessibility Pharmacology Patient compliance
- Language: English
- Type: Thesis , Masters , MPH
- Identifier: http://hdl.handle.net/10353/13248 , vital:39626
- Description: The purpose of the study is to determine the effect of the down referral chronic medication distribution system on patient's adherence to chronic medicine in Buffalo City sub - district by ensuring that chronic patients receive their correct medication on time and in correct quantities every month so that they can take the medication as recommended by the health professional. Adherence to chronic medication lead to better health outcome and reduced hospital re-admission. A non-experimental and descriptive quantitative research methodology was used. A data abstraction form developed by the researcher was used to record data from the medical records of chronically ill patients. The results of the study revealed that most of the chronically ill patients who were admitted to hospital were not adherent to their chronic medication. Patients are non-adherent even if they have chronic medication with them. This was evident in the number of patients who do not remember how many days did they not take their treatment. Others indicated that they share their medication with other family members who suffer from the same chronic condition. The patients' lack of understanding of their chronic condition and the consequences of not taking medication as instructed by the health professional contribute to non-adherence. Strengthening of health promotion programmes to educate the patients about their chronic condition would improve adherence. Most of the chronic conditions are life-style modifiable diseases. Patients must be educated about the changes they can make to improve their quality of life.
- Full Text:
- Date Issued: 2018
Re-defining the calling – narratives of women excluded from the ordained ministry in the Seventh-Day Adventist church in South Africa
- Chinyamurindi, Willie Tafadzwa
- Authors: Chinyamurindi, Willie Tafadzwa
- Date: 2019
- Subjects: Ordination of women
- Language: English
- Type: Thesis , Masters , M.Th
- Identifier: http://hdl.handle.net/10353/17529 , vital:41085
- Description: This work gives focus to understanding the notion of a calling amongst women excluded from the ordained ministry in the Seventh-day Adventist Church in South Africa. Historically, there is an observation that women attend religious services in larger numbers than their male counterparts. Despite this, it is notable that in terms of leadership, very few women occupy this preserve. Further, the experiences of those in positions of leadership (especially women) remain an under-researched area. This study used a qualitative approach, with an explanatory research design. Analyses were conducted by NVivo qualitative research software amongst 15 women who had completed theological training within the Seventh-day Adventist Church in South Africa. Narrative analysis was used as a means of analysing the collected data. The data analysis generated four main narratives and resultant sub-narrative(s): 1) calling as influencing decision to enter the pastoral ministry; 2) the pastoral ministry framed as a sustained challenge to women pastors; 3) the existence of a perceived theological disjuncture; and finally 4) passive yet overt resolution tactics. Implications for individual and organisational functioning are made based on these findings
- Full Text:
- Date Issued: 2019
- Authors: Chinyamurindi, Willie Tafadzwa
- Date: 2019
- Subjects: Ordination of women
- Language: English
- Type: Thesis , Masters , M.Th
- Identifier: http://hdl.handle.net/10353/17529 , vital:41085
- Description: This work gives focus to understanding the notion of a calling amongst women excluded from the ordained ministry in the Seventh-day Adventist Church in South Africa. Historically, there is an observation that women attend religious services in larger numbers than their male counterparts. Despite this, it is notable that in terms of leadership, very few women occupy this preserve. Further, the experiences of those in positions of leadership (especially women) remain an under-researched area. This study used a qualitative approach, with an explanatory research design. Analyses were conducted by NVivo qualitative research software amongst 15 women who had completed theological training within the Seventh-day Adventist Church in South Africa. Narrative analysis was used as a means of analysing the collected data. The data analysis generated four main narratives and resultant sub-narrative(s): 1) calling as influencing decision to enter the pastoral ministry; 2) the pastoral ministry framed as a sustained challenge to women pastors; 3) the existence of a perceived theological disjuncture; and finally 4) passive yet overt resolution tactics. Implications for individual and organisational functioning are made based on these findings
- Full Text:
- Date Issued: 2019
The contribution of F. D. Maurice to the nineteenth century discussion of the atonement in Britain
- Authors: Richardson, Robert Neville
- Date: 1971
- Subjects: Maurice, Frederick Denison, 1805-1872 Atonement -- History of doctrines -- 19th century Atonement -- Great Britain -- 19th century
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1235 , http://hdl.handle.net/10962/d1007485
- Description: From Introduction: Frederick Denison Maurice is generally remembered in connection with the rise of Christian Socialism. That his activities in this Movement were the most important aspect of his career is doubtful. ... Maurice's fundamental theological principles were: first, the idea of unity - unity in the Godhead, "Unity in Trinity", and unity among men in the human family; secondly, the Fatherhood of God - a Fatherhood which had at its heart the principle of sacrificial love. The events of Maurice's life proved to be fertile ground for the growth of these convictions. It was these convictions which shaped his whole understanding of the Atonement. Davies (3) points out that, in his teaching on the Atonement, Maurice turned away from the Western and Augustinian insistence that the basis of man's relationship to God was the Fall, and held, with the theolo Gians of the Eastern Church, that Christ's redemption of man is best understood as a restoration of man's relationship to God in Creation.
- Full Text:
- Date Issued: 1971
- Authors: Richardson, Robert Neville
- Date: 1971
- Subjects: Maurice, Frederick Denison, 1805-1872 Atonement -- History of doctrines -- 19th century Atonement -- Great Britain -- 19th century
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1235 , http://hdl.handle.net/10962/d1007485
- Description: From Introduction: Frederick Denison Maurice is generally remembered in connection with the rise of Christian Socialism. That his activities in this Movement were the most important aspect of his career is doubtful. ... Maurice's fundamental theological principles were: first, the idea of unity - unity in the Godhead, "Unity in Trinity", and unity among men in the human family; secondly, the Fatherhood of God - a Fatherhood which had at its heart the principle of sacrificial love. The events of Maurice's life proved to be fertile ground for the growth of these convictions. It was these convictions which shaped his whole understanding of the Atonement. Davies (3) points out that, in his teaching on the Atonement, Maurice turned away from the Western and Augustinian insistence that the basis of man's relationship to God was the Fall, and held, with the theolo Gians of the Eastern Church, that Christ's redemption of man is best understood as a restoration of man's relationship to God in Creation.
- Full Text:
- Date Issued: 1971
Monetary policy transmission in South Africa: a comparative analysis of credit and exchange rate channels
- Authors: Sebitso, Nathaniel Maemu
- Date: 2011
- Subjects: Monetary policy -- South Africa , Foreign exchange market -- South Africa , Financial crises -- South Africa , South Africa -- Economic conditions , South Africa -- Economic policy , Banks and banking -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1129 , http://hdl.handle.net/10962/d1020851
- Description: This thesis focuses on monetary policy transmission and particularly seeks to examine the impact of credit and exchange rate channels of monetary policy transmission in the South African economy. South Africa's monetary policy has gone through several changes over the past thirty years. In this respect, there is a need for robust empirical evidence on the effects of these channels on inflation and output. The thesis employs a structural vector autoregressive (SVAR) model to identify monetary transmission in South Africa for the period 1994:q4 - 2008:q2. The form of the SVAR used in this thesis is based on the fact that South Africa is a small open economy, which means that external shocks are an important driver of domestic activity. The impulse responses and variance decomposition results show that the repo rate, credit and exchange rate play a role in terms of their impact on inflation and output. The dynamic responses to the identified monetary policy shock are consistent with standard theory and highlight the importance of the interest rate channel. A shock to the interest rate, increasing it by one standard deviation, results in a persistent fall in credit. The response of output is immediate as it falls and bottoms out within the second year. Inflation shows a lagged response, it is positive within the first year as the exchange rate depreciates but in subsequent quarters inflation responds negatively as expected. Inflation falls and reaches a minimum by approximately eight quarters then moves towards baseline. The exchange rate shows delayed appreciation. The shock to the repo interest rate leads to an immediate depreciation of the exchange rate in the first two quarters as output declines, followed by an appreciation in the third and sixth quarter. Due to larger error bounds the impact of the repo rate on the exchange rate could be less effective within the first two years. The impulse responses suggest that monetary policy plays an effective role in stabilising the economy in response to a credit shock, notwithstanding large standard error bounds. Hence, the monetary authority reacts by increasing the repo rate as a result of inflation. The impact of credit on output is positive but is offset to some extent by the rising repo rate. In response to the rand appreciation, the monetary authority reduces the repo rate significantly during the first year with the maximum impact in the second year and then returns to baseline thereafter. Therefore the monetary authority reduces the repo rate, probably to stabilise falling inflation. The result shows that inflation falls as a result of the rand appreciation. A shock to the exchange rate causes a rise in output, though small in magnitude, which is persistent but reaches baseline at the end of the period. This result could reflect the effects of the resultant fall in the repo rate and a persistent rise in credit over the whole period, which tends to increase output. The exchange rate shows an obvious and stronger immediate impact on inflation compared to credit impact on inflation. However, the credit shock has an obvious and stronger impact on output compared to an exchange rate impact on output. However, the large standard error bounds may imply that credit and exchange rate channels are not as effective in the short run. It is important to note that the results are based on the SVAR model estimated with percentage growth rate of the variables. The variance decomposition result is in line with the impulse responses and shows that the exchange rate and credit channels could be important transmission channels in South Africa over the chosen sample period. The exchange rate and credit shocks show a stronger effect on inflation than on output, looking at both the impulse responses and variance decomposition results. The reaction of the repo interest rate to the credit and exchange rate shocks comes out as expected. The repo rate increases as a result of an increase in the credit and falls as a result of the currency appreciation.
- Full Text:
- Date Issued: 2011
- Authors: Sebitso, Nathaniel Maemu
- Date: 2011
- Subjects: Monetary policy -- South Africa , Foreign exchange market -- South Africa , Financial crises -- South Africa , South Africa -- Economic conditions , South Africa -- Economic policy , Banks and banking -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1129 , http://hdl.handle.net/10962/d1020851
- Description: This thesis focuses on monetary policy transmission and particularly seeks to examine the impact of credit and exchange rate channels of monetary policy transmission in the South African economy. South Africa's monetary policy has gone through several changes over the past thirty years. In this respect, there is a need for robust empirical evidence on the effects of these channels on inflation and output. The thesis employs a structural vector autoregressive (SVAR) model to identify monetary transmission in South Africa for the period 1994:q4 - 2008:q2. The form of the SVAR used in this thesis is based on the fact that South Africa is a small open economy, which means that external shocks are an important driver of domestic activity. The impulse responses and variance decomposition results show that the repo rate, credit and exchange rate play a role in terms of their impact on inflation and output. The dynamic responses to the identified monetary policy shock are consistent with standard theory and highlight the importance of the interest rate channel. A shock to the interest rate, increasing it by one standard deviation, results in a persistent fall in credit. The response of output is immediate as it falls and bottoms out within the second year. Inflation shows a lagged response, it is positive within the first year as the exchange rate depreciates but in subsequent quarters inflation responds negatively as expected. Inflation falls and reaches a minimum by approximately eight quarters then moves towards baseline. The exchange rate shows delayed appreciation. The shock to the repo interest rate leads to an immediate depreciation of the exchange rate in the first two quarters as output declines, followed by an appreciation in the third and sixth quarter. Due to larger error bounds the impact of the repo rate on the exchange rate could be less effective within the first two years. The impulse responses suggest that monetary policy plays an effective role in stabilising the economy in response to a credit shock, notwithstanding large standard error bounds. Hence, the monetary authority reacts by increasing the repo rate as a result of inflation. The impact of credit on output is positive but is offset to some extent by the rising repo rate. In response to the rand appreciation, the monetary authority reduces the repo rate significantly during the first year with the maximum impact in the second year and then returns to baseline thereafter. Therefore the monetary authority reduces the repo rate, probably to stabilise falling inflation. The result shows that inflation falls as a result of the rand appreciation. A shock to the exchange rate causes a rise in output, though small in magnitude, which is persistent but reaches baseline at the end of the period. This result could reflect the effects of the resultant fall in the repo rate and a persistent rise in credit over the whole period, which tends to increase output. The exchange rate shows an obvious and stronger immediate impact on inflation compared to credit impact on inflation. However, the credit shock has an obvious and stronger impact on output compared to an exchange rate impact on output. However, the large standard error bounds may imply that credit and exchange rate channels are not as effective in the short run. It is important to note that the results are based on the SVAR model estimated with percentage growth rate of the variables. The variance decomposition result is in line with the impulse responses and shows that the exchange rate and credit channels could be important transmission channels in South Africa over the chosen sample period. The exchange rate and credit shocks show a stronger effect on inflation than on output, looking at both the impulse responses and variance decomposition results. The reaction of the repo interest rate to the credit and exchange rate shocks comes out as expected. The repo rate increases as a result of an increase in the credit and falls as a result of the currency appreciation.
- Full Text:
- Date Issued: 2011
Sunrays in a chilly winter
- Authors: Nolutshungu, Simphiwe
- Date: 2015
- Subjects: Creative writing (Higher education) -- South Africa , South African poetry (English) -- Study and teaching (Higher) , South African poetry (English) -- 21st century , South Africa -- Poetry
- Language: English , Xhosa
- Type: Thesis , Masters , MA
- Identifier: vital:5993 , http://hdl.handle.net/10962/d1017777
- Description: In both my English and IsiXhosa poetry, my themes are love, politics, and the social issues of rural communities, and include my own life experiences, both good and bad. My poems are mainly short narrative accounts of township life. Although they do have a broad educational purpose, they do not preach to the reader. In IsiXhosa, my poetic forms are influenced by the works of J J R Jolobe, W N Mbovane, P T Mtuze, and my English poems by Pablo Neruda, Mafika Pascal Gwala, Garcia Lorca and others. , Intliziyo yona izimele gxebe ifihlakele Iyimfihlo, kumagumbi omphefumlo. Iyafunxa, ifukame kulo magumbi amxinwa. Iingcango, mba! Zivaliwe! Maxa wambi zide zixel’ isisila senkukhu, sona sibonwa mhla ligquthayo. Vul’ amehlo ubaz’ iindlebe uchul’ ukunyathela. Yiza ndikubambe ngesandla, sivul’ iingcango! Masivul’ iingcango zentliziyo yam, sikrobe ngaphakathi! Masithi ntla‐ntla kumagumb’ amathathu kuphela! Masithi ntla‐ntla, kwelepolitiki yakwaXhosa, Kaloku nam ndingumXhosa! Masithi ntla‐ntla kwelifukame, i.z.i.x.i.n.g.a.x.i n.o.b.u.n.c.w.a.n.e. b.o.t.h.a.n.d.o, kaloku nam ndinemithamb’ ebalek’ igaz’ eliqhumayo! Ucango lokugqibela lukungenisa kwigumbi elinezidl’ umzi, Kaloku nam ndizalwa kulo mzi wakwaXhoooooosa! , This thesis is presented in two parts: English and isiXhosa.
- Full Text:
- Date Issued: 2015
- Authors: Nolutshungu, Simphiwe
- Date: 2015
- Subjects: Creative writing (Higher education) -- South Africa , South African poetry (English) -- Study and teaching (Higher) , South African poetry (English) -- 21st century , South Africa -- Poetry
- Language: English , Xhosa
- Type: Thesis , Masters , MA
- Identifier: vital:5993 , http://hdl.handle.net/10962/d1017777
- Description: In both my English and IsiXhosa poetry, my themes are love, politics, and the social issues of rural communities, and include my own life experiences, both good and bad. My poems are mainly short narrative accounts of township life. Although they do have a broad educational purpose, they do not preach to the reader. In IsiXhosa, my poetic forms are influenced by the works of J J R Jolobe, W N Mbovane, P T Mtuze, and my English poems by Pablo Neruda, Mafika Pascal Gwala, Garcia Lorca and others. , Intliziyo yona izimele gxebe ifihlakele Iyimfihlo, kumagumbi omphefumlo. Iyafunxa, ifukame kulo magumbi amxinwa. Iingcango, mba! Zivaliwe! Maxa wambi zide zixel’ isisila senkukhu, sona sibonwa mhla ligquthayo. Vul’ amehlo ubaz’ iindlebe uchul’ ukunyathela. Yiza ndikubambe ngesandla, sivul’ iingcango! Masivul’ iingcango zentliziyo yam, sikrobe ngaphakathi! Masithi ntla‐ntla kumagumb’ amathathu kuphela! Masithi ntla‐ntla, kwelepolitiki yakwaXhosa, Kaloku nam ndingumXhosa! Masithi ntla‐ntla kwelifukame, i.z.i.x.i.n.g.a.x.i n.o.b.u.n.c.w.a.n.e. b.o.t.h.a.n.d.o, kaloku nam ndinemithamb’ ebalek’ igaz’ eliqhumayo! Ucango lokugqibela lukungenisa kwigumbi elinezidl’ umzi, Kaloku nam ndizalwa kulo mzi wakwaXhoooooosa! , This thesis is presented in two parts: English and isiXhosa.
- Full Text:
- Date Issued: 2015
Land reform and rural livelihoods of evicted farm workers: a case study of Radway Green Farm Project
- Authors: Zishiri, Kudzanai
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/44377 , vital:25402
- Description: The land issue has remained a contentious one more than two decades into a democratic South Africa. With the dispossession of the indigenous people from their land stretching back as far as 1913, eviction of farm workers and farm dwellers has increased tremendously even in the post-Apartheid era. Thus, the main goal of this study is to analyse the impact of the eviction on the Radway Green farm workers’ community and to examine the factors affecting the generation of livelihood activities in their new settlement. In doing so, I used the Sustainable Rural Livelihoods Approach (SRLA) as my theoretical framework as it conceptually grounds my area of study. It was employed to analyse data gathered from the field through in-depth interviews, focus groups, key informant interviews and descriptive observation of the case study. The centrality of the SRLA concept is on rural development, poverty eradication and the ability or sustainability of the vulnerable and poor to cope with stresses and shocks as they make a living (Scoones, 1998: 5). In that regard, the theoretical framework became an important cornerstone in analysing the impact of eviction of the Radway Green farm workers’ community and examining the factors affecting the generation of livelihoods activities in their new settlement. To analyse the research findings, various themes were utilised Forced Evictions and Resettlement; Eviction or Displacement; The Struggles of Recreating Livelihoods; The Need for Security of Land Tenure and Access to Infrastructure. Under these themes, the study revealed how the eviction was detrimental to the livelihoods of the farm workers and farm dwellers as they lost the land that was a primary source for the construction of their livelihoods. They lost employment, homes, agricultural land for food security and natural resources, social and family structures and most importantly cultural disruption. It is well documented that the rural poor who constitute the farm workers and the farm dwellers are some of the vulnerable people who need constant governmental support through the promulgation of laws that protect them and assist in livelihood construction. Thus, this study also served to examine how the evicted workers and their families have settled into their new homes and how they, in conjunction with the Department of Rural Development and Land Reform and any other government agencies are faring in terms of the establishment of income generating projects for their livelihoods at the new settlement.
- Full Text:
- Date Issued: 2017
Land reform and rural livelihoods of evicted farm workers: a case study of Radway Green Farm Project
- Authors: Zishiri, Kudzanai
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/44377 , vital:25402
- Description: The land issue has remained a contentious one more than two decades into a democratic South Africa. With the dispossession of the indigenous people from their land stretching back as far as 1913, eviction of farm workers and farm dwellers has increased tremendously even in the post-Apartheid era. Thus, the main goal of this study is to analyse the impact of the eviction on the Radway Green farm workers’ community and to examine the factors affecting the generation of livelihood activities in their new settlement. In doing so, I used the Sustainable Rural Livelihoods Approach (SRLA) as my theoretical framework as it conceptually grounds my area of study. It was employed to analyse data gathered from the field through in-depth interviews, focus groups, key informant interviews and descriptive observation of the case study. The centrality of the SRLA concept is on rural development, poverty eradication and the ability or sustainability of the vulnerable and poor to cope with stresses and shocks as they make a living (Scoones, 1998: 5). In that regard, the theoretical framework became an important cornerstone in analysing the impact of eviction of the Radway Green farm workers’ community and examining the factors affecting the generation of livelihoods activities in their new settlement. To analyse the research findings, various themes were utilised Forced Evictions and Resettlement; Eviction or Displacement; The Struggles of Recreating Livelihoods; The Need for Security of Land Tenure and Access to Infrastructure. Under these themes, the study revealed how the eviction was detrimental to the livelihoods of the farm workers and farm dwellers as they lost the land that was a primary source for the construction of their livelihoods. They lost employment, homes, agricultural land for food security and natural resources, social and family structures and most importantly cultural disruption. It is well documented that the rural poor who constitute the farm workers and the farm dwellers are some of the vulnerable people who need constant governmental support through the promulgation of laws that protect them and assist in livelihood construction. Thus, this study also served to examine how the evicted workers and their families have settled into their new homes and how they, in conjunction with the Department of Rural Development and Land Reform and any other government agencies are faring in terms of the establishment of income generating projects for their livelihoods at the new settlement.
- Full Text:
- Date Issued: 2017
A survey of youth development projects in the Department of Social Development in the province of the Eastern Cape: a management perspective
- Dliwayo, Mziwodumo Archibald
- Authors: Dliwayo, Mziwodumo Archibald
- Date: 2014
- Subjects: Youth in development -- South Africa -- Eastern Cape , Economic development projects , Youth -- Services for
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/4429 , vital:20600
- Description: The objective of this research is to establish how non-adherence of Amathole District development projects to the Department of Social Development’s Community Development Systems and Operational Manual has contributed to failure of these projects. The background to this research lies in the deliberate policy efforts of the post 1994 democratic dispensation in South Africa to drive development through community-based development approaches. Explicitly pro-poor public policies, development plans and fiscal frameworks were anchored on the concept of community empowerment. The Reconstruction and Development Programme was the first such policy and strategy framework that sought to enshrine the principles of community empowerment and participation. As such, Provincial and Local government are often seen as key strategic drivers of community empowerment initiatives and interventions. South Africa’s governance model is still evolving, but it is clearly committed to local development and service delivery through a decentralised system of government that espouses community involvement. Government strategy has been heavily focused on speed and delivery in order to deal with the historical socio-economic backlogs it inherited. In the focus area of youth development projects, one recognises that poor management has dramatically reduced the effectiveness of many interventions. This research explores how non-adherence of these projects to policy guidelines set out in the Community Development Systems and Operations Manual has contributed to their failure. The research does this by looking at the various management procedures that are supposed to be undertaken during both the initial planning phases and during the subsequent implementation phases of youth development projects. Actual methodologies are compared against this standard. The research is undoubtedly a contribution to the field of strategic management of youth development initiatives which have as their primary intention the reduction of youth unemployment. Research surveys on this topic are limited, and the objective is to enrich the discourse on effective youth projects management practices.
- Full Text:
- Date Issued: 2014
- Authors: Dliwayo, Mziwodumo Archibald
- Date: 2014
- Subjects: Youth in development -- South Africa -- Eastern Cape , Economic development projects , Youth -- Services for
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10948/4429 , vital:20600
- Description: The objective of this research is to establish how non-adherence of Amathole District development projects to the Department of Social Development’s Community Development Systems and Operational Manual has contributed to failure of these projects. The background to this research lies in the deliberate policy efforts of the post 1994 democratic dispensation in South Africa to drive development through community-based development approaches. Explicitly pro-poor public policies, development plans and fiscal frameworks were anchored on the concept of community empowerment. The Reconstruction and Development Programme was the first such policy and strategy framework that sought to enshrine the principles of community empowerment and participation. As such, Provincial and Local government are often seen as key strategic drivers of community empowerment initiatives and interventions. South Africa’s governance model is still evolving, but it is clearly committed to local development and service delivery through a decentralised system of government that espouses community involvement. Government strategy has been heavily focused on speed and delivery in order to deal with the historical socio-economic backlogs it inherited. In the focus area of youth development projects, one recognises that poor management has dramatically reduced the effectiveness of many interventions. This research explores how non-adherence of these projects to policy guidelines set out in the Community Development Systems and Operations Manual has contributed to their failure. The research does this by looking at the various management procedures that are supposed to be undertaken during both the initial planning phases and during the subsequent implementation phases of youth development projects. Actual methodologies are compared against this standard. The research is undoubtedly a contribution to the field of strategic management of youth development initiatives which have as their primary intention the reduction of youth unemployment. Research surveys on this topic are limited, and the objective is to enrich the discourse on effective youth projects management practices.
- Full Text:
- Date Issued: 2014
Understanding as an epistemic virtue : a value-driven non-factive account
- Authors: Rybko, Caitlin
- Date: 2017
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:21195 , http://hdl.handle.net/10962/6874
- Description: Understanding has been somewhat undervalued and underexplored in the current literature and often its value is tied into that of either truth or knowledge. This thesis aims to provide an account of understanding that defends its value as an epistemic good that is not contingent on either knowledge or truth. I will aim to construct an account that is value driven rather than nature driven as it seems that this is where the problem lies. In order to do this I will assess two current accounts of understanding and show that they cannot adequately explain the value that we give to understanding, nor do they explain how we understand.
- Full Text:
- Date Issued: 2017
- Authors: Rybko, Caitlin
- Date: 2017
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:21195 , http://hdl.handle.net/10962/6874
- Description: Understanding has been somewhat undervalued and underexplored in the current literature and often its value is tied into that of either truth or knowledge. This thesis aims to provide an account of understanding that defends its value as an epistemic good that is not contingent on either knowledge or truth. I will aim to construct an account that is value driven rather than nature driven as it seems that this is where the problem lies. In order to do this I will assess two current accounts of understanding and show that they cannot adequately explain the value that we give to understanding, nor do they explain how we understand.
- Full Text:
- Date Issued: 2017
The relationship between stock market development and economic growth in Africa
- Authors: Mkhize, Siyanda
- Date: 2019
- Subjects: Stock exchanges -- Africa , Africa -- Economic conditions -- 21st century , Economic development -- Africa -- 21st century , Capital market -- Africa , Finance -- Africa -- 21st century , Developing countries -- Economic conditions -- 21st century
- Language: English
- Type: text , Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/115149 , vital:34082
- Description: Over the years there has been a substantial increase in the number of African stock markets. This has generated much interest from local and foreign investors, as these stock markets have had high returns. These conditions have created an interesting scenario for investigating the relationship between stock market development and economic growth. However, this opportunity has largely been neglected as the research on African stock market development is limited in developing economies relative to research conducted in developed countries. Furthermore, the research that has been conducted on the relationship between stock market development and economic growth in Africa, has generated inconclusive and conflicting results, in addition to this, the institutional quality of African countries is disregarded in most studies when the stock market development and economic growth nexus is analysed. Therefore, this study aims to explore the relationship between stock market development and economic growth, incorporating institution variables to account for the institutional quality of African countries to provide clarity in this context. To achieve this, two sets of research hypotheses were created the first set aims to determine whether stock development has an influence on economic growth. The second set is to determine if there is any causal relationship between stock market development and economic growth. The study utilizes System Generalized Method of Moments models to examine the effect of stock market development on economic growth, in 18 African countries for the period 2003- 2016. The results indicate that market capitalization has a positive influence on economic growth whilst, contrastingly liquidity in the form of value traded has a negative effect on economic growth. The study further analyses the causal relationship between stock market development and economic growth, by employing the recently developed PVAR-Granger causality test. However, before this is done several Pedroni cointegration tests were first conducted to establish whether a long-term relationship exists between stock market development and economic growth, which revealed that no strong evidence of cointegration exists necessitating the use of a PVAR-Granger causality test. The PVAR-Granger causality test reveals that stock market development granger causes economic growth, irrespective of the stock market development measure used and there is no feedback effect from economic growth. The unilateral causality established in this study flowing from stock market development to economic growth supports the supply-leading hypothesis. The overall results of this study demonstrate that there is ambiguity on the impact of stock market development on economic growth, as the measures of stock market development have contrasting impacts on economic growth. The size component of stock market development in the form of market capitalization has positive influence whilst, liquidity in form of total value traded has a negative effect. However, the causal relationship is clearly shown to be unilaterally flowing from stock market development to economic growth.
- Full Text:
- Date Issued: 2019
- Authors: Mkhize, Siyanda
- Date: 2019
- Subjects: Stock exchanges -- Africa , Africa -- Economic conditions -- 21st century , Economic development -- Africa -- 21st century , Capital market -- Africa , Finance -- Africa -- 21st century , Developing countries -- Economic conditions -- 21st century
- Language: English
- Type: text , Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/115149 , vital:34082
- Description: Over the years there has been a substantial increase in the number of African stock markets. This has generated much interest from local and foreign investors, as these stock markets have had high returns. These conditions have created an interesting scenario for investigating the relationship between stock market development and economic growth. However, this opportunity has largely been neglected as the research on African stock market development is limited in developing economies relative to research conducted in developed countries. Furthermore, the research that has been conducted on the relationship between stock market development and economic growth in Africa, has generated inconclusive and conflicting results, in addition to this, the institutional quality of African countries is disregarded in most studies when the stock market development and economic growth nexus is analysed. Therefore, this study aims to explore the relationship between stock market development and economic growth, incorporating institution variables to account for the institutional quality of African countries to provide clarity in this context. To achieve this, two sets of research hypotheses were created the first set aims to determine whether stock development has an influence on economic growth. The second set is to determine if there is any causal relationship between stock market development and economic growth. The study utilizes System Generalized Method of Moments models to examine the effect of stock market development on economic growth, in 18 African countries for the period 2003- 2016. The results indicate that market capitalization has a positive influence on economic growth whilst, contrastingly liquidity in the form of value traded has a negative effect on economic growth. The study further analyses the causal relationship between stock market development and economic growth, by employing the recently developed PVAR-Granger causality test. However, before this is done several Pedroni cointegration tests were first conducted to establish whether a long-term relationship exists between stock market development and economic growth, which revealed that no strong evidence of cointegration exists necessitating the use of a PVAR-Granger causality test. The PVAR-Granger causality test reveals that stock market development granger causes economic growth, irrespective of the stock market development measure used and there is no feedback effect from economic growth. The unilateral causality established in this study flowing from stock market development to economic growth supports the supply-leading hypothesis. The overall results of this study demonstrate that there is ambiguity on the impact of stock market development on economic growth, as the measures of stock market development have contrasting impacts on economic growth. The size component of stock market development in the form of market capitalization has positive influence whilst, liquidity in form of total value traded has a negative effect. However, the causal relationship is clearly shown to be unilaterally flowing from stock market development to economic growth.
- Full Text:
- Date Issued: 2019
Statistical analysis of the ionospheric response during storm conditions over South Africa using ionosonde and GPS data
- Matamba, Tshimangadzo Merline
- Authors: Matamba, Tshimangadzo Merline
- Date: 2015
- Subjects: Ionospheric storms -- South Africa -- Grahamstown , Ionospheric storms -- South Africa -- Madimbo , Magnetic storms -- South Africa -- Grahamstown , Magnetic storms -- South Africa -- Madimbo , Ionosondes , Global Positioning System
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5555 , http://hdl.handle.net/10962/d1017899
- Description: Ionospheric storms are an extreme form of space weather phenomena which affect space- and ground-based technological systems. Extreme solar activity may give rise to Coronal Mass Ejections (CME) and solar flares that may result in ionospheric storms. This thesis reports on a statistical analysis of the ionospheric response over the ionosonde stations Grahamstown (33.3◦S, 26.5◦E) and Madimbo (22.4◦S,30.9◦E), South Africa, during geomagnetic storm conditions which occurred during the period 1996 - 2011. Total Electron Content (TEC) derived from Global Positioning System (GPS) data by a dual Frequency receiver and an ionosonde at Grahamstown, was analysed for the storms that occurred during the period 2006 - 2011. A comprehensive analysis of the critical frequency of the F2 layer (foF2) and TEC was done. To identify the geomagnetically disturbed conditions the Disturbance storm time (Dst) index with a storm criteria of Dst ≤ −50 nT was used. The ionospheric disturbances were categorized into three responses, namely single disturbance, double disturbance and not significant (NS) ionospheric storms. Single disturbance ionospheric storms refer to positive (P) and negative (N) ionospheric storms observed separately, while double disturbance storms refer to negative and positive ionospheric storms observed during the same storm period. The statistics show the impact of geomagnetic storms on the ionosphere and indicate that negative ionospheric effects follow the solar cycle. In general, only a few ionospheric storms (0.11%) were observed during solar minimum. Positive ionospheric storms occurred most frequently (47.54%) during the declining phase of solar cycle 23. Seasonally, negative ionospheric storms occurred mostly during the summer (63.24%), while positive ionospheric storms occurred frequently during the winter (53.62%). An important finding is that only negative ionospheric storms were observed during great geomagnetic storm activity (Dst ≤ −350 nT). For periods when both ionosonde and GPS was available, the two data sets indicated similar ionospheric responses. Hence, GPS data can be used to effectively identify the ionospheric response in the absence of ionosonde data.
- Full Text:
- Date Issued: 2015
- Authors: Matamba, Tshimangadzo Merline
- Date: 2015
- Subjects: Ionospheric storms -- South Africa -- Grahamstown , Ionospheric storms -- South Africa -- Madimbo , Magnetic storms -- South Africa -- Grahamstown , Magnetic storms -- South Africa -- Madimbo , Ionosondes , Global Positioning System
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5555 , http://hdl.handle.net/10962/d1017899
- Description: Ionospheric storms are an extreme form of space weather phenomena which affect space- and ground-based technological systems. Extreme solar activity may give rise to Coronal Mass Ejections (CME) and solar flares that may result in ionospheric storms. This thesis reports on a statistical analysis of the ionospheric response over the ionosonde stations Grahamstown (33.3◦S, 26.5◦E) and Madimbo (22.4◦S,30.9◦E), South Africa, during geomagnetic storm conditions which occurred during the period 1996 - 2011. Total Electron Content (TEC) derived from Global Positioning System (GPS) data by a dual Frequency receiver and an ionosonde at Grahamstown, was analysed for the storms that occurred during the period 2006 - 2011. A comprehensive analysis of the critical frequency of the F2 layer (foF2) and TEC was done. To identify the geomagnetically disturbed conditions the Disturbance storm time (Dst) index with a storm criteria of Dst ≤ −50 nT was used. The ionospheric disturbances were categorized into three responses, namely single disturbance, double disturbance and not significant (NS) ionospheric storms. Single disturbance ionospheric storms refer to positive (P) and negative (N) ionospheric storms observed separately, while double disturbance storms refer to negative and positive ionospheric storms observed during the same storm period. The statistics show the impact of geomagnetic storms on the ionosphere and indicate that negative ionospheric effects follow the solar cycle. In general, only a few ionospheric storms (0.11%) were observed during solar minimum. Positive ionospheric storms occurred most frequently (47.54%) during the declining phase of solar cycle 23. Seasonally, negative ionospheric storms occurred mostly during the summer (63.24%), while positive ionospheric storms occurred frequently during the winter (53.62%). An important finding is that only negative ionospheric storms were observed during great geomagnetic storm activity (Dst ≤ −350 nT). For periods when both ionosonde and GPS was available, the two data sets indicated similar ionospheric responses. Hence, GPS data can be used to effectively identify the ionospheric response in the absence of ionosonde data.
- Full Text:
- Date Issued: 2015
An empirical study on staff turnover and retention within Eskom : Eastern Cape Operating Unit
- Authors: Chibba, Rajesh Chagan
- Date: 2015
- Subjects: Eskom (Firm) , Labor turnover -- South Africa -- Eastern Cape , Employee retention -- South Africa -- Eastern Cape , Job satisfaction -- South Africa -- Eastern Cape , Career development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:847 , http://hdl.handle.net/10962/d1017514
- Description: This research paper is broken up into three sections, namely an evaluation report, a literature review and a description of the research methodology. The evaluation report section is an assessment of the factors that could contribute to staff leaving the organisation and why staff would choose to remain with the organisation. The Distribution Division of Eskom is divided into nine separate Operating Units (OU's), in line with the nine Provinces. According to an Eskom Human Resource Manager (Mjali, 2013), as at March 2012 there were 2231 employees in the Easter Cape Operating Unit, while the staff turnover for the same period was 4.53%. Of the 101 staff that had resigned for the period 01 April 2011 to 31 March 2012, there were 27 transfers, 26 resignations and 30 retirements. The balance of 18 staff that left was due to dismissals and deaths. While the statistics suggest a healthy level of staff turnover at present, given the current pressures that Eskom employees are under, it is important to investigate their future intentions and to see what Eskom can do to continue to retain their services. The literature relating to staff turnover and retention was examined to determine the meaning of the terms retention and turnover and to review the relevant turnover topics that were emerging from the exit interview data. The research conducted was quantitative in nature, and a questionnaire was distributed to all managerial staff within the Eastern Cape Operating Unit of Eskom. The questionnaire was sent electronically to the participants via email with the link to the questionnaire. Participants were requested to respond on questions relating to factors on turnover and retention, and the responses were used to assess employee's intention to either remain with the organisation or to leave. The feedback received was analysed with the use of data analysis in Microsoft Excel (2010). The results of the research showed that there were two distinct themes related to employees' intention to remain with the organisation, namely job satisfaction and career development. On the other end of the scale, themes which would cause staff to want to leave the organisation were the performance management system of the organisation, not being listened to (i.e. to the ideas and views of staff) and leadership (i.e. the way the organisation was being led). Recommendations are made to management. The study also recommends future research that can be done to get greater insight into factors relating to staff turnover and retention. A detailed review of the literature is included in Section two of the report. Only essential components of the literature are included in Section one of report. Section three of the report provided a detailed description of the research design and the research procedure that was followed.
- Full Text:
- Date Issued: 2015
- Authors: Chibba, Rajesh Chagan
- Date: 2015
- Subjects: Eskom (Firm) , Labor turnover -- South Africa -- Eastern Cape , Employee retention -- South Africa -- Eastern Cape , Job satisfaction -- South Africa -- Eastern Cape , Career development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:847 , http://hdl.handle.net/10962/d1017514
- Description: This research paper is broken up into three sections, namely an evaluation report, a literature review and a description of the research methodology. The evaluation report section is an assessment of the factors that could contribute to staff leaving the organisation and why staff would choose to remain with the organisation. The Distribution Division of Eskom is divided into nine separate Operating Units (OU's), in line with the nine Provinces. According to an Eskom Human Resource Manager (Mjali, 2013), as at March 2012 there were 2231 employees in the Easter Cape Operating Unit, while the staff turnover for the same period was 4.53%. Of the 101 staff that had resigned for the period 01 April 2011 to 31 March 2012, there were 27 transfers, 26 resignations and 30 retirements. The balance of 18 staff that left was due to dismissals and deaths. While the statistics suggest a healthy level of staff turnover at present, given the current pressures that Eskom employees are under, it is important to investigate their future intentions and to see what Eskom can do to continue to retain their services. The literature relating to staff turnover and retention was examined to determine the meaning of the terms retention and turnover and to review the relevant turnover topics that were emerging from the exit interview data. The research conducted was quantitative in nature, and a questionnaire was distributed to all managerial staff within the Eastern Cape Operating Unit of Eskom. The questionnaire was sent electronically to the participants via email with the link to the questionnaire. Participants were requested to respond on questions relating to factors on turnover and retention, and the responses were used to assess employee's intention to either remain with the organisation or to leave. The feedback received was analysed with the use of data analysis in Microsoft Excel (2010). The results of the research showed that there were two distinct themes related to employees' intention to remain with the organisation, namely job satisfaction and career development. On the other end of the scale, themes which would cause staff to want to leave the organisation were the performance management system of the organisation, not being listened to (i.e. to the ideas and views of staff) and leadership (i.e. the way the organisation was being led). Recommendations are made to management. The study also recommends future research that can be done to get greater insight into factors relating to staff turnover and retention. A detailed review of the literature is included in Section two of the report. Only essential components of the literature are included in Section one of report. Section three of the report provided a detailed description of the research design and the research procedure that was followed.
- Full Text:
- Date Issued: 2015
Computational design of a smart and efficient control system for a residential air source heat pump water heater
- Authors: Yongoua Nana Joel
- Date: 2017
- Subjects: Heat pumps -- Specifications Water heaters Renewable energy sources
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/4582 , vital:28435
- Description: An air source heat pump (ASHP) water heater is a renewable and energy efficient hot water heating technology. ASHP water heaters are fast gaining maturity in the South African market and in Africa at large due to their low energy consumption (about 67 percent lower than conventional geysers), relatively low installation and operation cost, their environmental friendly nature and possibly the ease to retrofit with the old inefficient technologies. Furthermore, ASHP water heaters make use of some of the most recent advancement in refrigeration technologies enhancing their performance through a wide range of weather conditions. However, residential ASHP water heaters which come at the tail of a series of highly sophisticated models still harbour primitive control designs. One of such control system is the intermittent (on/off) control whereby the ASHP unit responds to a temperature differential threshold rather than instantaneous temperature fluctuations. Unfortunately, this control method contributes to a rapid deterioration of the compressor and other actuators due to high starting current during transient states and partial loading. Capacity control is a better alterative as it offers a more reliable system’s performance as well as a better protection for the system components. However, the drawbacks of implementing such a technology on residential ASHP water heaters is the initial purchasing cost. We use a systematic approach in this research to circumvent the purchasing cost and complete redesign hysteresis. The first step was centered around a hypothetical analysis of the performance of the heat exchangers in a bid to uncover the weakness during the operation of a residential ASHP water heater. It was observed that at ambient temperatures above 22°C notably during summer and winter afternoons, water only harnesses about 75 percent of the total heat rejected. Furthermore, the actuators keep doing work for about 15-20 minutes even after the heat transfer process has ceased completely. Following these observations, a sequential flow algorithm was developed aimed at matching the consumption point to weather variables like ambient temperature and secondly to most efficiently synchronize actuator components for a better energy management. This novel control method can save up to 58 percent of energy compared to the conventional on/off method during summer afternoons and averagely 20 percent during the rest of the day. It also has the merit to be cost effective as it barely requires no component retrofitting.
- Full Text:
- Date Issued: 2017
- Authors: Yongoua Nana Joel
- Date: 2017
- Subjects: Heat pumps -- Specifications Water heaters Renewable energy sources
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/4582 , vital:28435
- Description: An air source heat pump (ASHP) water heater is a renewable and energy efficient hot water heating technology. ASHP water heaters are fast gaining maturity in the South African market and in Africa at large due to their low energy consumption (about 67 percent lower than conventional geysers), relatively low installation and operation cost, their environmental friendly nature and possibly the ease to retrofit with the old inefficient technologies. Furthermore, ASHP water heaters make use of some of the most recent advancement in refrigeration technologies enhancing their performance through a wide range of weather conditions. However, residential ASHP water heaters which come at the tail of a series of highly sophisticated models still harbour primitive control designs. One of such control system is the intermittent (on/off) control whereby the ASHP unit responds to a temperature differential threshold rather than instantaneous temperature fluctuations. Unfortunately, this control method contributes to a rapid deterioration of the compressor and other actuators due to high starting current during transient states and partial loading. Capacity control is a better alterative as it offers a more reliable system’s performance as well as a better protection for the system components. However, the drawbacks of implementing such a technology on residential ASHP water heaters is the initial purchasing cost. We use a systematic approach in this research to circumvent the purchasing cost and complete redesign hysteresis. The first step was centered around a hypothetical analysis of the performance of the heat exchangers in a bid to uncover the weakness during the operation of a residential ASHP water heater. It was observed that at ambient temperatures above 22°C notably during summer and winter afternoons, water only harnesses about 75 percent of the total heat rejected. Furthermore, the actuators keep doing work for about 15-20 minutes even after the heat transfer process has ceased completely. Following these observations, a sequential flow algorithm was developed aimed at matching the consumption point to weather variables like ambient temperature and secondly to most efficiently synchronize actuator components for a better energy management. This novel control method can save up to 58 percent of energy compared to the conventional on/off method during summer afternoons and averagely 20 percent during the rest of the day. It also has the merit to be cost effective as it barely requires no component retrofitting.
- Full Text:
- Date Issued: 2017