A study of the airflow on the windward slope of a transverse dune in the Alexandria coastal dunefield
- Authors: Burkinshaw, Jennifer Ruth
- Date: 2021-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52734 , vital:43883
- Description: Our understanding of the evolution of dune morphology has been hampered by a lack of empirical observations of airflow behaviour over dune forms. Sand dunes intrude into the atmospheric boundary layer and convergence of streamlines results in an acceleration of airflow up the windward slopes of dunes. This study examines the airflow structure and corresponding bedform development on the windward slope of a 7 m high transverse dune on the edge of the Alexandria coastal dunefield, Algoa Bay, South Africa. The Alexandria dunefield is subjected to a trimodal wind regime, consisting of the dominant south-westerly which blows all year round, summer easterlies and winter northwesterlies. The morphology of the study dune, Dune13, is controlled by the easterlies and north-westerlies, and reverses seasonally with respect to these two winds. Seven section lines 30 m apart and normal to the dune crest were surveyed regularly over the period of a year to monitor the reversal process. Three detailed topographic surveys were also done during this period. Airflow behaviour was monitored during the year. Wind speed profiles on the windward slope of the dune were measured using 4 to 5 vertical arrays of anemometers positioned from the base of the dune to the crest on a 1 selected section line. Usually 4 to 5 anemometers were deployed in each vertical array, from a height of 6 to 10 cm above the surface, up to a height of 150 cm above the surface. Initially 8 microanemometers were available; ultimately 28 anemometers were run simultaneously. An independent weather station at an elevation of 6 m recorded the unaccelerated flow. Local gradient measurements and erosion and deposition rates were recorded along selected section lines. Strong summer easterly winds (14 m/sec at 1.4 m above the dune crest) were measured on a dune slope in the process of being transformed from a slipface to a stoss slope. The following winter, light north-westerly winds (typically B m/sec at 1.6 m above the dune crest) were measured on the new windward slope already reversed by the prevailing winter wind. Airflow data confirm the compression of airflow against the windward slope resulting in a non-logarithmic wind speed profile. Compression results in an increased shear velocity within 30 cm of the dune surface, and the dune slope is eroded. Higher up in the wind speed profile, shear velocity decreases to 0.1 m/sec. It is not known at what height the wind speed profile recovers from the intrusion of the dune into the boundary layer. High values of shear velocity (1.6 m/sec) above the rounded crestal area of the dune record the recovery of the wind speed profile from flow divergence, which is a response to the rapid reduction of dune gradient and is accompanied by deposition of sand in this region. 2 The erosion pin data act as a simple and sensitive test for changes in gradient, reflecting the dune's response to changes in the airflow regime. The shape of the dune plays a major role in determining the extent of the compression and the distribution of shear velocity up the slope. Increased shear velocity is experienced on that part of the slope which is nonaerodynamic with respect to the prevailing wind. Under unidirectional conditions, feedback between flow and form results ultimately in a slope with a curvature such that shear velocity increases systematically upslope. The survey data and erosion pin data record the reversal process as the dune achieves a new steady state during each wind season. The existence of a non-logarithmic wind speed profile makes it difficult to know what relevant measure of shear velocity is to be used in sand transport equations. Future work should include wind speed measurements within 10 cm of the surface. An ideal study modelling aeolian bedform development would utilise wind tunnel measurements, combined with field measurements such as obtained in this study, for comparison with numerical modelling. The study needs to be extended to 3-dimensional airflow measurements. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Burkinshaw, Jennifer Ruth
- Date: 2021-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52734 , vital:43883
- Description: Our understanding of the evolution of dune morphology has been hampered by a lack of empirical observations of airflow behaviour over dune forms. Sand dunes intrude into the atmospheric boundary layer and convergence of streamlines results in an acceleration of airflow up the windward slopes of dunes. This study examines the airflow structure and corresponding bedform development on the windward slope of a 7 m high transverse dune on the edge of the Alexandria coastal dunefield, Algoa Bay, South Africa. The Alexandria dunefield is subjected to a trimodal wind regime, consisting of the dominant south-westerly which blows all year round, summer easterlies and winter northwesterlies. The morphology of the study dune, Dune13, is controlled by the easterlies and north-westerlies, and reverses seasonally with respect to these two winds. Seven section lines 30 m apart and normal to the dune crest were surveyed regularly over the period of a year to monitor the reversal process. Three detailed topographic surveys were also done during this period. Airflow behaviour was monitored during the year. Wind speed profiles on the windward slope of the dune were measured using 4 to 5 vertical arrays of anemometers positioned from the base of the dune to the crest on a 1 selected section line. Usually 4 to 5 anemometers were deployed in each vertical array, from a height of 6 to 10 cm above the surface, up to a height of 150 cm above the surface. Initially 8 microanemometers were available; ultimately 28 anemometers were run simultaneously. An independent weather station at an elevation of 6 m recorded the unaccelerated flow. Local gradient measurements and erosion and deposition rates were recorded along selected section lines. Strong summer easterly winds (14 m/sec at 1.4 m above the dune crest) were measured on a dune slope in the process of being transformed from a slipface to a stoss slope. The following winter, light north-westerly winds (typically B m/sec at 1.6 m above the dune crest) were measured on the new windward slope already reversed by the prevailing winter wind. Airflow data confirm the compression of airflow against the windward slope resulting in a non-logarithmic wind speed profile. Compression results in an increased shear velocity within 30 cm of the dune surface, and the dune slope is eroded. Higher up in the wind speed profile, shear velocity decreases to 0.1 m/sec. It is not known at what height the wind speed profile recovers from the intrusion of the dune into the boundary layer. High values of shear velocity (1.6 m/sec) above the rounded crestal area of the dune record the recovery of the wind speed profile from flow divergence, which is a response to the rapid reduction of dune gradient and is accompanied by deposition of sand in this region. 2 The erosion pin data act as a simple and sensitive test for changes in gradient, reflecting the dune's response to changes in the airflow regime. The shape of the dune plays a major role in determining the extent of the compression and the distribution of shear velocity up the slope. Increased shear velocity is experienced on that part of the slope which is nonaerodynamic with respect to the prevailing wind. Under unidirectional conditions, feedback between flow and form results ultimately in a slope with a curvature such that shear velocity increases systematically upslope. The survey data and erosion pin data record the reversal process as the dune achieves a new steady state during each wind season. The existence of a non-logarithmic wind speed profile makes it difficult to know what relevant measure of shear velocity is to be used in sand transport equations. Future work should include wind speed measurements within 10 cm of the surface. An ideal study modelling aeolian bedform development would utilise wind tunnel measurements, combined with field measurements such as obtained in this study, for comparison with numerical modelling. The study needs to be extended to 3-dimensional airflow measurements. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2021
- Full Text:
- Date Issued: 2021-04
The role of Technical and Vocational Education and Training (TVET) in economic development in the O.R. Tambo Distric Municipality
- Authors: Dandala, Malibongwe
- Date: 2021-04
- Subjects: Technical education -- Economic aspects -- South Africa -- Eastern Cape , Economic development -- Education -- South Africa -- Eastern Cape , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52413 , vital:43639
- Description: The study aims to understand the practical effects that technical and vocational education and training (TVET) can have on the economic development of OR Tambo District Municipality. The district is situated in an area endowed with numerous natural resources, including fertile land for agricultural augmentation, dairy farming and beef production. This district municipality has a history as the starting point for the liberation of South Africa, where heroes such as the late OR Tambo, Nelson Rolihlahla Mandela, (the first democratic president of South Africa), Walter Sisulu and numerous others were born. The district is situated in the OR Tambo region of the Eastern Cape Province of South Africa. More than five TVET campuses offering training in a variety of skills, such as Engineering and Design, Mechanical and Electrical Engineering, Public Management, Human Recourses Management, Office Practice, Hospitality and Educare are spread across the OR Tambo District. This district also has a burden of high unemployment among the youth, resulting in a high crime rate. A mixed research method was adopted while conducting this study. The study findings found that TVET colleges have a significant role towards economic development of O.R Tambo. TVET colleges are able to supply suitably qualified employable students who have practical knowledge compared to other students from other academic institutions. The students are skilled and semi-skilled can contribute towards socio-economic activities thus contribute towards economic development in O.R Tambo Municipality. , Thesis (MPA) -- Faculty of Humanities, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: Dandala, Malibongwe
- Date: 2021-04
- Subjects: Technical education -- Economic aspects -- South Africa -- Eastern Cape , Economic development -- Education -- South Africa -- Eastern Cape , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52413 , vital:43639
- Description: The study aims to understand the practical effects that technical and vocational education and training (TVET) can have on the economic development of OR Tambo District Municipality. The district is situated in an area endowed with numerous natural resources, including fertile land for agricultural augmentation, dairy farming and beef production. This district municipality has a history as the starting point for the liberation of South Africa, where heroes such as the late OR Tambo, Nelson Rolihlahla Mandela, (the first democratic president of South Africa), Walter Sisulu and numerous others were born. The district is situated in the OR Tambo region of the Eastern Cape Province of South Africa. More than five TVET campuses offering training in a variety of skills, such as Engineering and Design, Mechanical and Electrical Engineering, Public Management, Human Recourses Management, Office Practice, Hospitality and Educare are spread across the OR Tambo District. This district also has a burden of high unemployment among the youth, resulting in a high crime rate. A mixed research method was adopted while conducting this study. The study findings found that TVET colleges have a significant role towards economic development of O.R Tambo. TVET colleges are able to supply suitably qualified employable students who have practical knowledge compared to other students from other academic institutions. The students are skilled and semi-skilled can contribute towards socio-economic activities thus contribute towards economic development in O.R Tambo Municipality. , Thesis (MPA) -- Faculty of Humanities, 2021
- Full Text:
- Date Issued: 2021-04
An exploration of the memorandum of understanding between the Mberengwa rural district council and the Mberengwa community : a conflict resolution perspective
- Authors: Pedro, Jean
- Date: 2020-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55139 , vital:49148
- Description: This study is motivated by a gap in a competent framework to adequately compensate communities whose land are expropriated for public use by the Government of Zimbabwe. It seeks to explore the extent to which the Memorandum of Understanding between the Mberengwa Rural District Council and the affected people of Mberengwa resulted in a fair and adequate compensation which specifically provided for rehabilitated livelihoods. The main objective is to determine whether the compensation was adequate and satisfying for the Mberengwa community and to this end, a qualitative methodology is utilised to collect and analyse data. The findings reveal that the Memorandum of Understanding did not provide for adequate land that adequately compensated for the expropriated land. The affected community also did not benefit from a possible rehabilitation of livelihoods. By the end of the study, the Mberengwa compensation had not been concluded and the programme, which was expected to be completed in October 2015, had not closed. The researcher recommends a competent project management strategy, PRINCE2 to ensure comprehensive planning that ensures stage-based delivery of the agreed compensation products. Another recommendation involved in-depth problem-solving workshops, which involves all affected members to increase the chances of success. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2020
- Full Text:
- Date Issued: 2020-04
- Authors: Pedro, Jean
- Date: 2020-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55139 , vital:49148
- Description: This study is motivated by a gap in a competent framework to adequately compensate communities whose land are expropriated for public use by the Government of Zimbabwe. It seeks to explore the extent to which the Memorandum of Understanding between the Mberengwa Rural District Council and the affected people of Mberengwa resulted in a fair and adequate compensation which specifically provided for rehabilitated livelihoods. The main objective is to determine whether the compensation was adequate and satisfying for the Mberengwa community and to this end, a qualitative methodology is utilised to collect and analyse data. The findings reveal that the Memorandum of Understanding did not provide for adequate land that adequately compensated for the expropriated land. The affected community also did not benefit from a possible rehabilitation of livelihoods. By the end of the study, the Mberengwa compensation had not been concluded and the programme, which was expected to be completed in October 2015, had not closed. The researcher recommends a competent project management strategy, PRINCE2 to ensure comprehensive planning that ensures stage-based delivery of the agreed compensation products. Another recommendation involved in-depth problem-solving workshops, which involves all affected members to increase the chances of success. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2020
- Full Text:
- Date Issued: 2020-04
Managing the corporate reputation of a transforming organisation: a study of multimedia University of Kenya
- Authors: Mtange, Margaret Mulekani
- Date: 2020-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55042 , vital:48830
- Description: Universities, like other organisations, are challenged to manage corporate identity and reputation to maintain a competitive edge. Few studies in Africa focus on the impact of internal communication on corporate identity and reputation management during organisational transformation. Thus, this study interrogated how a transforming and complex university in Kenya managed the corporate identity, image and reputation for competitive advantage. The purpose of the study was to establish how Multimedia University of Kenya (MMU) management communicated with its employees to nurture the corporate identity, image and reputation during a ten-year period of transformation. The study draws insights from in-depth interviews with 23 university management members, 178 self-administered questionnaires through random stratification of MMU employees, and content review of two MMU strategic plans ranging from 2011 to 2021. The findings suggest that MMU management used formal and interactive channels to create awareness of organisational transformation. These channels included face-to-face engagements, formal meetings and mediated communication through telephone conversations and intranet that facilitated record keeping. The management engaged in top-down and bottom-up communication to build employee trust, while employees expressed reservations of bottom-up information accuracy, suggesting information exclusion. On the contrary, the employees preferred digital and interpersonal channels for internal communication, which included telephone conversations, social media, personal visits by MMU management, and university events. Publicity activities were to disseminate information to prospective students and sponsors through selected private television, vernacular radio, and MMU radio stations, traditional print media, and the MMU website to communicate the MMU brand and image. Employees acknowledged that MMU brands itself as a leader in telecommunication, technology, mechanical, manufacturing, and media training through state-of-the-art equipment, robust faculty, and problem-solving ventures through research. The current study proposes stronger employee involvement, executive packaging and positioning, coaching successful faculty members as brand ambassadors, retraining employees, and employee participation in policy formulation to enhance new culture. In addition, these opositions will enhance the corporate identity, brand, as well as university performance, product quality, policy and processes to enrich the corporate reputation during transformation. The findings challenge university management to actively engage the corporate communication function, emphasise employee participation, and focus on the continual improvement of corporate identity and reputation management practices for competitive advantage. The current study proposes a participative, multi-layered and multi-dimensional communication model for efficient and excellent internal communication. The current study recommends that corporate communication practitioner be strategically positioned to coordinate employee engagement, utilise appropriate communication channels and counsel university management on corporate identity, image and reputation management during organisational transformation. , Thesis (PhD) -- Faculty of Humanities, School of Language, Media and Communication, 2020
- Full Text:
- Date Issued: 2020-04
- Authors: Mtange, Margaret Mulekani
- Date: 2020-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55042 , vital:48830
- Description: Universities, like other organisations, are challenged to manage corporate identity and reputation to maintain a competitive edge. Few studies in Africa focus on the impact of internal communication on corporate identity and reputation management during organisational transformation. Thus, this study interrogated how a transforming and complex university in Kenya managed the corporate identity, image and reputation for competitive advantage. The purpose of the study was to establish how Multimedia University of Kenya (MMU) management communicated with its employees to nurture the corporate identity, image and reputation during a ten-year period of transformation. The study draws insights from in-depth interviews with 23 university management members, 178 self-administered questionnaires through random stratification of MMU employees, and content review of two MMU strategic plans ranging from 2011 to 2021. The findings suggest that MMU management used formal and interactive channels to create awareness of organisational transformation. These channels included face-to-face engagements, formal meetings and mediated communication through telephone conversations and intranet that facilitated record keeping. The management engaged in top-down and bottom-up communication to build employee trust, while employees expressed reservations of bottom-up information accuracy, suggesting information exclusion. On the contrary, the employees preferred digital and interpersonal channels for internal communication, which included telephone conversations, social media, personal visits by MMU management, and university events. Publicity activities were to disseminate information to prospective students and sponsors through selected private television, vernacular radio, and MMU radio stations, traditional print media, and the MMU website to communicate the MMU brand and image. Employees acknowledged that MMU brands itself as a leader in telecommunication, technology, mechanical, manufacturing, and media training through state-of-the-art equipment, robust faculty, and problem-solving ventures through research. The current study proposes stronger employee involvement, executive packaging and positioning, coaching successful faculty members as brand ambassadors, retraining employees, and employee participation in policy formulation to enhance new culture. In addition, these opositions will enhance the corporate identity, brand, as well as university performance, product quality, policy and processes to enrich the corporate reputation during transformation. The findings challenge university management to actively engage the corporate communication function, emphasise employee participation, and focus on the continual improvement of corporate identity and reputation management practices for competitive advantage. The current study proposes a participative, multi-layered and multi-dimensional communication model for efficient and excellent internal communication. The current study recommends that corporate communication practitioner be strategically positioned to coordinate employee engagement, utilise appropriate communication channels and counsel university management on corporate identity, image and reputation management during organisational transformation. , Thesis (PhD) -- Faculty of Humanities, School of Language, Media and Communication, 2020
- Full Text:
- Date Issued: 2020-04
Representations of trauma by three women writers from the global south
- Authors: Pabel, Annemarie Luise
- Date: 2020-04
- Subjects: Women authors (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctor's theses , text
- Identifier: http://hdl.handle.net/10948/55128 , vital:49131
- Description: This study examines modalities of psychological trauma in selected works by three women writers from the global South: the Scottish-Sierra Leonean writer Aminatta Forna, the ChileanAmerican author Isabel Allende and Anuradha Roy from India. It aims to examine textual manifestations of complex and prolonged experiences of trauma and the ways in which literary forms facilitate such representations. Specifically, I am interested in multi-layered and interrelated forms of trauma which exceed the conventional, event-based conceptualization of trauma as an “overwhelming experience of sudden or catastrophic events” (Caruth 1996:11). 1 Such experiences include war, exile, extensive childhood sexual abuse, maternal bereavement and familial disintegration. I have selected three texts from each author’s body of literary work: Forna’s memoir The Devil that Danced on the Water: a Daughter’s Quest (2003) and her novels The Memory of Love (2010) and Happiness (2010), Allende’s memoirs Paula (1994), My Invented Country (2004) and Portrait in Sepia (2000) and Roy’s novels An Atlas of Impossible Longing (2008), Sleeping on Jupiter (2015) and All the Lives We Never Lived (2018). The study’s focus on women writers from different contexts in the global South is motivated by an imbalance in critical attention and validation extreme forms of suffering receive globally. , Thesis (PhD) -- Faculty of Humanities, School of Language, Media and Communication, 2020
- Full Text:
- Date Issued: 2020-04
- Authors: Pabel, Annemarie Luise
- Date: 2020-04
- Subjects: Women authors (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctor's theses , text
- Identifier: http://hdl.handle.net/10948/55128 , vital:49131
- Description: This study examines modalities of psychological trauma in selected works by three women writers from the global South: the Scottish-Sierra Leonean writer Aminatta Forna, the ChileanAmerican author Isabel Allende and Anuradha Roy from India. It aims to examine textual manifestations of complex and prolonged experiences of trauma and the ways in which literary forms facilitate such representations. Specifically, I am interested in multi-layered and interrelated forms of trauma which exceed the conventional, event-based conceptualization of trauma as an “overwhelming experience of sudden or catastrophic events” (Caruth 1996:11). 1 Such experiences include war, exile, extensive childhood sexual abuse, maternal bereavement and familial disintegration. I have selected three texts from each author’s body of literary work: Forna’s memoir The Devil that Danced on the Water: a Daughter’s Quest (2003) and her novels The Memory of Love (2010) and Happiness (2010), Allende’s memoirs Paula (1994), My Invented Country (2004) and Portrait in Sepia (2000) and Roy’s novels An Atlas of Impossible Longing (2008), Sleeping on Jupiter (2015) and All the Lives We Never Lived (2018). The study’s focus on women writers from different contexts in the global South is motivated by an imbalance in critical attention and validation extreme forms of suffering receive globally. , Thesis (PhD) -- Faculty of Humanities, School of Language, Media and Communication, 2020
- Full Text:
- Date Issued: 2020-04
Possible futures for the African built environment towards 2050
- Authors: Adendorff, Gillian Lorraine
- Date: 2014-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's/Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53325 , vital:45136
- Description: Purpose –The purpose of this thesis is to develop four scenarios for Africa’s built environment over the nextfortyyears: The ”Angel” or “Good Governance”Scenario,in which positive elements become a realisation for Africa’s built environment and are conjointly favourable; The “Dwarf” or “Uneven African Development”Scenario, in which key driving forces unfold inan uneven pattern, or have a differentiated impact on Africa’s built environment; The “Elf” or Bad Governance Scenario,in which less good governance prevails, but where a fortunate built environment and securemanagement allowsAfrica to become competitive and benefit from satisfactory economic growth;and The “Hobgoblin” or “Business and Governance as usual” Scenario,in which negative regional drivers of change corrode positive policies and initiatives in a manner which compounds the pre-existing threats of Africa’s built environment development.Design/Methodology/Approach –The goal of this thesis is not only to affirm what is already known and knowable regardingwhat is happening right now at the intersections of Africa and its built environment development, but also to explore the many ways in which environmental scanning and built environment development could co-involve,both push and inhibit each other,in the future. Thereafter, this thesis beginsto examine what possible paths may be implicatedfor Africa’s poor and vulnerable built environment. Scenario planning is a methodology designed to help researchers, organisations and even nations alike through this creative process. This thesis begins to identifydriversof change, and then combines these driversin different ways to create a set of scenarios regardinghow the future built environment of Africa could evolve.Practical implications –This thesis provides a useful insight regardingdrivers for change for Africa’s built environment,and how to anticipate these changes in the mostcurrentScenario planning.Originality/Value –This thesis addressesthe future of Africa’s built environment from a decision maker’s point of view over the next 40 years. , Thesis (PhD) -- Faculty of Engineering, the Built Environment and Technology, School of the Built Environment and Civil Engineering, 2021
- Full Text:
- Date Issued: 2014-04
- Authors: Adendorff, Gillian Lorraine
- Date: 2014-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's/Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/53325 , vital:45136
- Description: Purpose –The purpose of this thesis is to develop four scenarios for Africa’s built environment over the nextfortyyears: The ”Angel” or “Good Governance”Scenario,in which positive elements become a realisation for Africa’s built environment and are conjointly favourable; The “Dwarf” or “Uneven African Development”Scenario, in which key driving forces unfold inan uneven pattern, or have a differentiated impact on Africa’s built environment; The “Elf” or Bad Governance Scenario,in which less good governance prevails, but where a fortunate built environment and securemanagement allowsAfrica to become competitive and benefit from satisfactory economic growth;and The “Hobgoblin” or “Business and Governance as usual” Scenario,in which negative regional drivers of change corrode positive policies and initiatives in a manner which compounds the pre-existing threats of Africa’s built environment development.Design/Methodology/Approach –The goal of this thesis is not only to affirm what is already known and knowable regardingwhat is happening right now at the intersections of Africa and its built environment development, but also to explore the many ways in which environmental scanning and built environment development could co-involve,both push and inhibit each other,in the future. Thereafter, this thesis beginsto examine what possible paths may be implicatedfor Africa’s poor and vulnerable built environment. Scenario planning is a methodology designed to help researchers, organisations and even nations alike through this creative process. This thesis begins to identifydriversof change, and then combines these driversin different ways to create a set of scenarios regardinghow the future built environment of Africa could evolve.Practical implications –This thesis provides a useful insight regardingdrivers for change for Africa’s built environment,and how to anticipate these changes in the mostcurrentScenario planning.Originality/Value –This thesis addressesthe future of Africa’s built environment from a decision maker’s point of view over the next 40 years. , Thesis (PhD) -- Faculty of Engineering, the Built Environment and Technology, School of the Built Environment and Civil Engineering, 2021
- Full Text:
- Date Issued: 2014-04
The impact of talent management on profitability at Business Connexion
- Authors: Mbulawa, Xolani
- Date: 2013-11
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53337 , vital:45139
- Description: Human resource is seen as one of the key organisational factors for business success. The latest focus in the business arena has been how talent can be optimised to improve business success. When one reflects and looks back from the 1940s to the 1980s, it is clear that HR was not seen as a business unit that could impact profitability. It is clear in the literature that from the 1900s HR has evolved to being a business partner and a catalyst to improving financial performance within organisations. This has predominately been driven by HR ensuring the attraction and retention of high potential employees who can contribute to profits. The study’s focal point is whether talent management components impact profitability. The selected talent management components for this study are namely talent strategy, talent recruitment, talent development, performance management, talent retention, and succession planning. A strong belief exist that poor implementation of talent management components impedes on companies reaching optimum profit levels. It is for this reason that this study will argue the importance of talent management components as a strategic obligation in the current competitive war for talent. Business reality demands that companies should ensure having current and future talent needs addressed if they want to stay competitive. The war for talent has led to companies fighting for high potential talent, not only through remuneration packages ,but taking into account other talent management components that encompasses aspects such as work-life balance, better performance management linked to rewards and incentives , challenging work, succession planning etc. The researcher took a view to have this study done within BCX who is an employer of the researcher. The hypothesis utilised is the application of talent management components as an approach and process to facilitate profitability within BCX. Research shows that most companies are taking talent management very serious and are fully aware of its impact to productivity and profitability. Businesses in the service industry identified that implementing talent management processes and approaches is vital to competitive edge and profitability. However many companies are still struggling to reach the real understanding of what it meant by talent management. The research data indicates that most respondents are fully aware of the importance of these components. However at BCX, either they are unaware, uncertain on some of the talent components within the company and are unsure of the existence of these components and their impact to profitability. The literature reviewed in chapter two deliberates talent management components assessed in the questionnaire as imperative in contributing to profitability. Business Connexion does not implement these components to the extent of success. However some of the components are well implemented and managed such as performance management. Managers at Business Connexion to some extent have conflicting views of how the company is implementing these components and on their impact to profitability. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMMU Business School, 2021
- Full Text:
- Date Issued: 2013-11
- Authors: Mbulawa, Xolani
- Date: 2013-11
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53337 , vital:45139
- Description: Human resource is seen as one of the key organisational factors for business success. The latest focus in the business arena has been how talent can be optimised to improve business success. When one reflects and looks back from the 1940s to the 1980s, it is clear that HR was not seen as a business unit that could impact profitability. It is clear in the literature that from the 1900s HR has evolved to being a business partner and a catalyst to improving financial performance within organisations. This has predominately been driven by HR ensuring the attraction and retention of high potential employees who can contribute to profits. The study’s focal point is whether talent management components impact profitability. The selected talent management components for this study are namely talent strategy, talent recruitment, talent development, performance management, talent retention, and succession planning. A strong belief exist that poor implementation of talent management components impedes on companies reaching optimum profit levels. It is for this reason that this study will argue the importance of talent management components as a strategic obligation in the current competitive war for talent. Business reality demands that companies should ensure having current and future talent needs addressed if they want to stay competitive. The war for talent has led to companies fighting for high potential talent, not only through remuneration packages ,but taking into account other talent management components that encompasses aspects such as work-life balance, better performance management linked to rewards and incentives , challenging work, succession planning etc. The researcher took a view to have this study done within BCX who is an employer of the researcher. The hypothesis utilised is the application of talent management components as an approach and process to facilitate profitability within BCX. Research shows that most companies are taking talent management very serious and are fully aware of its impact to productivity and profitability. Businesses in the service industry identified that implementing talent management processes and approaches is vital to competitive edge and profitability. However many companies are still struggling to reach the real understanding of what it meant by talent management. The research data indicates that most respondents are fully aware of the importance of these components. However at BCX, either they are unaware, uncertain on some of the talent components within the company and are unsure of the existence of these components and their impact to profitability. The literature reviewed in chapter two deliberates talent management components assessed in the questionnaire as imperative in contributing to profitability. Business Connexion does not implement these components to the extent of success. However some of the components are well implemented and managed such as performance management. Managers at Business Connexion to some extent have conflicting views of how the company is implementing these components and on their impact to profitability. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMMU Business School, 2021
- Full Text:
- Date Issued: 2013-11
Like Katherine
- Authors: Morgan, Jane Mary Kathleen
- Date: 2013
- Subjects: Creative writing , Fiction , South Africa , Creative writing (Higher education) , Short stories, South African (English) -- 21st century , South African fiction (English) -- 21st century , English language -- Writing
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:5964 , http://hdl.handle.net/10962/d1001814
- Description: Vicky, a thirty something English radio journalist, has moved to Cape Town to try and work out what it is that's missing from her life and to fill the gap. At first she thinks she's found what she's looking for, but a series of unsettling events makes her realise she has simply brought her problems with her. She goes back to England, ostensibly for work, where she is contacted by her stepbrother, Mark. They hardly know each other but he has a reason for wanting to find her. They meet and, for both of them, their encounters change the way they see themselves and their relationships. Vicky comes to understand more about her past and her family and, for the first time, to find a connection with her emotional life
- Full Text:
- Date Issued: 2013
- Authors: Morgan, Jane Mary Kathleen
- Date: 2013
- Subjects: Creative writing , Fiction , South Africa , Creative writing (Higher education) , Short stories, South African (English) -- 21st century , South African fiction (English) -- 21st century , English language -- Writing
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:5964 , http://hdl.handle.net/10962/d1001814
- Description: Vicky, a thirty something English radio journalist, has moved to Cape Town to try and work out what it is that's missing from her life and to fill the gap. At first she thinks she's found what she's looking for, but a series of unsettling events makes her realise she has simply brought her problems with her. She goes back to England, ostensibly for work, where she is contacted by her stepbrother, Mark. They hardly know each other but he has a reason for wanting to find her. They meet and, for both of them, their encounters change the way they see themselves and their relationships. Vicky comes to understand more about her past and her family and, for the first time, to find a connection with her emotional life
- Full Text:
- Date Issued: 2013
The talisman
- Authors: Reed, Graham Conan
- Date: 2013
- Subjects: Fiction , Short stories , English , South Africa , Creative writing (Higher education) , Short stories, South African (English) -- 21st century , South African fiction (English) -- 21st century , English language -- Writing
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:5967 , http://hdl.handle.net/10962/d1001817
- Description: The Talisman is an adventure story set in a future where much of today's cultural memory and technology has been lost. Following a hunting accident, a young man named Forest survives a life-threatening wound and embarks on a quest for knowledge. Rising sea levels, bands of marauders, wild animals and the perils of survival in the broken world are not the only problems facing the survivors. The nature of the collapse of the society, what triggered it and its subsequent unfolding, bequeaths an existential quandary upon them that only Forest, and a rare text as old as the earth itself, can unravel
- Full Text:
- Date Issued: 2013
- Authors: Reed, Graham Conan
- Date: 2013
- Subjects: Fiction , Short stories , English , South Africa , Creative writing (Higher education) , Short stories, South African (English) -- 21st century , South African fiction (English) -- 21st century , English language -- Writing
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:5967 , http://hdl.handle.net/10962/d1001817
- Description: The Talisman is an adventure story set in a future where much of today's cultural memory and technology has been lost. Following a hunting accident, a young man named Forest survives a life-threatening wound and embarks on a quest for knowledge. Rising sea levels, bands of marauders, wild animals and the perils of survival in the broken world are not the only problems facing the survivors. The nature of the collapse of the society, what triggered it and its subsequent unfolding, bequeaths an existential quandary upon them that only Forest, and a rare text as old as the earth itself, can unravel
- Full Text:
- Date Issued: 2013
Patterns of belief in Bushman creation tales: an interpretive study relating to /Xam, Maluti, and Zu/'oasi sources
- Authors: Howard, Nadine B
- Date: 2000
- Subjects: South Africa , Creation -- Mythology , Spirituality -- Africa , San (African people) -- Religion , San (African people) -- Folklore
- Language: English
- Type: Text
- Identifier: vital:549 , http://hdl.handle.net/10962/d1019978 , Donated by Geoffrey Howard, 2010.
- Description: “Patterns of Belief in Bushman Creation Tales” regard /Xam, Maluti, and Zu/’oasi mythology. The study divides into three sections. The Early Period of Conceptual Unity concerns creation of the eland, a symbolic antelope. All beings are animal-persons of the early race. The /Xam deity /Kaggen creates and secretly cares for an eland to whom he feeds honey. The family, missing honey, sends Mongoose to spy on /Kaggen. He sees the eland and informs his father who kills it without Kaggen’s knowledge. Kaggen weeps bitterly. Elsewhere, when Cagn’s away Maluti sons hunt and discover an unknown creature. They try repeatedly to stab it as it breaks away, but returns to lay down. Finally Gewi kills it. They take meat and blood home, but later see Cagn’s snares and feel afraid. The Transition Period of Conceptual Separation and Restoration follows. Separation of animals and people takes place through re-creation and naming. The former animal-person world passes away. Maluti elands are re-created as Gewi tries to undo his “mischief”. Churning the eland’s blood, it scatters, becoming snakes, then hartebeests. Cagn and his wife help: spinning blood, adding fat from the heart. They produce multitudes of untamed elands. Gewi who “spoilt” them must hunt and kill one, but he fails. Cagn then teaches both sons to hunt. However, his elands are swift, and he will now dwell in their bones. “That day game were given to men to eat,” and the transition to knowing is made. Zu/’oasi animal-persons journey to the fire of creation; there to be beautifully marked or otherwise distinguished. /Xam antelope await their naming through the eating or drinking of liquid honeys which colour their hides. The Third Section offers an overview of concepts the thesis presents. It also bears the key to unlock a very old mystery. , Intended as a Masters of Arts thesis for the University of Natal, the author was unable to complete the final chapter before her death, and the thesis was never submitted for examination. It was the wish of her husband that her careful study should be brought to light and be made available to other students of this field.
- Full Text:
- Date Issued: 2000
- Authors: Howard, Nadine B
- Date: 2000
- Subjects: South Africa , Creation -- Mythology , Spirituality -- Africa , San (African people) -- Religion , San (African people) -- Folklore
- Language: English
- Type: Text
- Identifier: vital:549 , http://hdl.handle.net/10962/d1019978 , Donated by Geoffrey Howard, 2010.
- Description: “Patterns of Belief in Bushman Creation Tales” regard /Xam, Maluti, and Zu/’oasi mythology. The study divides into three sections. The Early Period of Conceptual Unity concerns creation of the eland, a symbolic antelope. All beings are animal-persons of the early race. The /Xam deity /Kaggen creates and secretly cares for an eland to whom he feeds honey. The family, missing honey, sends Mongoose to spy on /Kaggen. He sees the eland and informs his father who kills it without Kaggen’s knowledge. Kaggen weeps bitterly. Elsewhere, when Cagn’s away Maluti sons hunt and discover an unknown creature. They try repeatedly to stab it as it breaks away, but returns to lay down. Finally Gewi kills it. They take meat and blood home, but later see Cagn’s snares and feel afraid. The Transition Period of Conceptual Separation and Restoration follows. Separation of animals and people takes place through re-creation and naming. The former animal-person world passes away. Maluti elands are re-created as Gewi tries to undo his “mischief”. Churning the eland’s blood, it scatters, becoming snakes, then hartebeests. Cagn and his wife help: spinning blood, adding fat from the heart. They produce multitudes of untamed elands. Gewi who “spoilt” them must hunt and kill one, but he fails. Cagn then teaches both sons to hunt. However, his elands are swift, and he will now dwell in their bones. “That day game were given to men to eat,” and the transition to knowing is made. Zu/’oasi animal-persons journey to the fire of creation; there to be beautifully marked or otherwise distinguished. /Xam antelope await their naming through the eating or drinking of liquid honeys which colour their hides. The Third Section offers an overview of concepts the thesis presents. It also bears the key to unlock a very old mystery. , Intended as a Masters of Arts thesis for the University of Natal, the author was unable to complete the final chapter before her death, and the thesis was never submitted for examination. It was the wish of her husband that her careful study should be brought to light and be made available to other students of this field.
- Full Text:
- Date Issued: 2000
A mission and five commissions: a study of some aspects of the educational work of the American Zulu Mission, 1835-1910
- Authors: George, Ambrose Cato
- Date: 1989
- Subjects: Missions -- South Africa Missions -- Educational Work , American Zulu Mission , Natal , South Africa , Colonial government , Adams College , Newton Adams , Missions , Missionary education , Educational purpose , Zulu people
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1337 , http://hdl.handle.net/10962/d1001403
- Description: This thesis examines the work of the American Zulu Mission in Natal from 1835 to 1910. Of the institutions controlled by this mission, the most famous was that known in the 20th Century as Adams College, named after one of the founders of the Natal work, Dr Newton Adams. Although other research work has been done on this institution and this mission in general, this thesis attempts to examine the work in the light of the mission's own view of its educational purpose and the expectations of the Colonial Government of what could be expected of missionary education. To meet this purpose particular stress was laid first on the actual development of the mission's educational institutions, especially when reports and letters assessed the aims of the developments and the ways in which these aims were being met. Secondly, the aims of missionary education were explained through five capital Colonial Government Commissions, which looked, in a number of different ways, at the current position and future of the Zulu peoples of Natal. These Commissions reported in 1846, 1852-1853, 1881-1882, 1892 and 1902. Two major findings emerge from the investigation. The first was lack of clarity, not only on the part of what the mission was trying to do, but also on what the Colonial Government expected it to do. To this absence of clarity must be added the continuous shortage of finance, the reluctance of the Zulu themselves to accept the combination of education (which they wanted) and conversion (of which they were often suspicious). In these circumstances, their slow progress of the 75 years from 1835 to 1910 becomes understandable. Had these years been the total extent of the mission' s contribution to Natal, there would be little justification for any extended investigation, or any reason behind the high prestige which the mission enjoyed. It is shown, however, that from 1902 onwards a new, more incisive and directional policy, especially on the question of education, came from the mission. This emerged particularly under the leadership of Le Roy, Principal from 1903 to 1925. The last part of this thesis assesses this new direction. The detailed investigation comes to an end at 1910 when with the creation of Union, an entirely new organisation and dispensation came into being. In the last years of Le Roy's principalship the promise of the period of 1902 to 1920 came to fruition and in the final chapter a brief summary of these developments are given
- Full Text:
- Date Issued: 1989
- Authors: George, Ambrose Cato
- Date: 1989
- Subjects: Missions -- South Africa Missions -- Educational Work , American Zulu Mission , Natal , South Africa , Colonial government , Adams College , Newton Adams , Missions , Missionary education , Educational purpose , Zulu people
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:1337 , http://hdl.handle.net/10962/d1001403
- Description: This thesis examines the work of the American Zulu Mission in Natal from 1835 to 1910. Of the institutions controlled by this mission, the most famous was that known in the 20th Century as Adams College, named after one of the founders of the Natal work, Dr Newton Adams. Although other research work has been done on this institution and this mission in general, this thesis attempts to examine the work in the light of the mission's own view of its educational purpose and the expectations of the Colonial Government of what could be expected of missionary education. To meet this purpose particular stress was laid first on the actual development of the mission's educational institutions, especially when reports and letters assessed the aims of the developments and the ways in which these aims were being met. Secondly, the aims of missionary education were explained through five capital Colonial Government Commissions, which looked, in a number of different ways, at the current position and future of the Zulu peoples of Natal. These Commissions reported in 1846, 1852-1853, 1881-1882, 1892 and 1902. Two major findings emerge from the investigation. The first was lack of clarity, not only on the part of what the mission was trying to do, but also on what the Colonial Government expected it to do. To this absence of clarity must be added the continuous shortage of finance, the reluctance of the Zulu themselves to accept the combination of education (which they wanted) and conversion (of which they were often suspicious). In these circumstances, their slow progress of the 75 years from 1835 to 1910 becomes understandable. Had these years been the total extent of the mission' s contribution to Natal, there would be little justification for any extended investigation, or any reason behind the high prestige which the mission enjoyed. It is shown, however, that from 1902 onwards a new, more incisive and directional policy, especially on the question of education, came from the mission. This emerged particularly under the leadership of Le Roy, Principal from 1903 to 1925. The last part of this thesis assesses this new direction. The detailed investigation comes to an end at 1910 when with the creation of Union, an entirely new organisation and dispensation came into being. In the last years of Le Roy's principalship the promise of the period of 1902 to 1920 came to fruition and in the final chapter a brief summary of these developments are given
- Full Text:
- Date Issued: 1989
Graphicacy and the third dimension: an investigation into the problem of poor performance in relief mapwork in South African secondary schools
- Burton, Michael St. John Whitehead
- Authors: Burton, Michael St. John Whitehead
- Date: 1986
- Subjects: Graphicacy , Maps , Map reading , Visualisation , Geography , Secondary education , South Africa , Pupils , Learners , Teachers
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: vital:1358 , http://hdl.handle.net/10962/d1001424
- Description: Three-dimensional graphicacy is the part of map work that appears to be the most problematIcal. Bartz (1970) says that thinking and visualising in three-dimensional space is difficult enough, but trying to derive notions in three-dimensions, when you have only seen them as they are represented in distorted two-dimensional fashion, is even more difficult. Yet pupils of geography are required to learn such three-dimensional concepts from the two-dimensional distorted map presentations. The geography teacher has an important educational role to play in promoting graphicacy and Balchin (1965), who coined the term, felt that it should be an essential underpinning of an integrated education. The problem is that children perform badly, teachers are not successfully imparting three-dimensional graphicacy skills and as Board and Taylor (1977) indicate, for some time now it has been fashionable to dismiss maps as being irrelevant or useless in geographical research. This thesis attempts to analyse this reported malady, the problems are exposed and solutions offered. Investigation of the literature, with the aim of clarifying the problems involved, follows four leads. These are the part played by the map as a mode of communication, the physical processes involved in mapwork revealed by work in the realm of neurophysiology, the process of visualisation in the field of perception and psychology, and finally the stage of conceptual development of the mapworker. The state of affairs in South Africa is disclosed by an analysis of teacher-directed literature, of examination syllabuses, of text-book treatment of three-dimensional mapwork in South Africa and overseas, of past examination questions, and finally of teachers' views. Experimental exercises have been executed in an attempt to link the key findings of published research to the local scene. Conclusions are then drawn, and recommendations made for improving three-dimensional graphicacy in South African secondary schools.
- Full Text:
- Date Issued: 1986
- Authors: Burton, Michael St. John Whitehead
- Date: 1986
- Subjects: Graphicacy , Maps , Map reading , Visualisation , Geography , Secondary education , South Africa , Pupils , Learners , Teachers
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: vital:1358 , http://hdl.handle.net/10962/d1001424
- Description: Three-dimensional graphicacy is the part of map work that appears to be the most problematIcal. Bartz (1970) says that thinking and visualising in three-dimensional space is difficult enough, but trying to derive notions in three-dimensions, when you have only seen them as they are represented in distorted two-dimensional fashion, is even more difficult. Yet pupils of geography are required to learn such three-dimensional concepts from the two-dimensional distorted map presentations. The geography teacher has an important educational role to play in promoting graphicacy and Balchin (1965), who coined the term, felt that it should be an essential underpinning of an integrated education. The problem is that children perform badly, teachers are not successfully imparting three-dimensional graphicacy skills and as Board and Taylor (1977) indicate, for some time now it has been fashionable to dismiss maps as being irrelevant or useless in geographical research. This thesis attempts to analyse this reported malady, the problems are exposed and solutions offered. Investigation of the literature, with the aim of clarifying the problems involved, follows four leads. These are the part played by the map as a mode of communication, the physical processes involved in mapwork revealed by work in the realm of neurophysiology, the process of visualisation in the field of perception and psychology, and finally the stage of conceptual development of the mapworker. The state of affairs in South Africa is disclosed by an analysis of teacher-directed literature, of examination syllabuses, of text-book treatment of three-dimensional mapwork in South Africa and overseas, of past examination questions, and finally of teachers' views. Experimental exercises have been executed in an attempt to link the key findings of published research to the local scene. Conclusions are then drawn, and recommendations made for improving three-dimensional graphicacy in South African secondary schools.
- Full Text:
- Date Issued: 1986
The petrogenesis of the volcanic rocks of the Witwatersrand triad in the Klerksdorp area, Transvaal
- Authors: Bowen, Michael Peter
- Date: 1985
- Subjects: Volcanic rocks , Witwatersrand triad , Klerksdorp , Transvaal , Northwest Province , South Africa , Chemical analysis , Magma , Geology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4909 , http://hdl.handle.net/10962/d1001569
- Description: Several hundred chemical analyses of early Proterozoic lavas of the Witwatersrand triad (incorporating the Dominion Group, Witwatersrand Supergroup and Ventersdorp Supergroup) in the Klerksdorp area, have revealed the presence of various distinct magma types. These essentially correspond to formally defined lithostratigraphic units, but several inconsistencies have necessitated the use of informal nomenclature. The lavas have been regionally metamorphosed to low-grade, greenschist facies assemblages. Original igneous textures are preserved, despite a metamorphic overprint. Metamorphism has resulted in a certain degree of random chemical remobilization. Ba, Sr, Rb, K₂0, Na₂0 and CaO have been highly mobile, and their usefulness in petrogenetic modelling is extremely limited. In contrast, Zr, Nb, Y, LREE's, Cr, Ni, Ti0₂ P₂0₅ and Al₂0₃ have remained immobile. Ti/Zr and Ti/P ratios together constitute efficient discriminating variables for characterizing the different magma types. Lava compositions range from primitive Mg-rich tholeiites to rhyolites, the bulk being tholeiitic andesites. Al₂0₃ contents do not exceed 15%, a feature which reflects the tholeiitic, as opposed to calcalkaline, character of these lavas. Two magma-types are present within the Dominion Group, which is a typical example of bimodal volcanism. The Dominion basic lavas are overlain by the Dominion acid porphyries, with a limited amount of interfingering. The basic lava suite is highly fractionated, with compositions ranging from Mg-, Cr- and Ni-rich tholeiites (close to primary mantle melts) to evolved tholeiitic andesites. The most primitive liquids evolved by 45% fractional crystallization of hornblende, followed by a further 70% crystallization of an orthopyroxene-plagioclase assemblage containing up to 3% sulphides. The Dominion porphyries are rhyolitic, display very limited compositional variation, and probably represent a crustal melt related to the same magmatic event which produced the basic lavas. The only lavas from the Witwatersrand Supergroup present in the Klerksdorp area are those of the Crown Formation (Jeppestown amygdaloid). These are tholeiitic dacites which display extremely limited compositional variation, and are unrelated to any of the other magmas of the Witwatersrand triad. The Ventersdorp Supergroup comprises 4 magma-types: The Kliprivierberg Group lavas at the base are subdivisible into 3 sub-types on the basis of Zr contents. (Zr>11Oppm) are the most evolved. They are tholeiitic andesites which display fairly limited compositional variation. It is likely that more evolved compositions are present in other areas where the porphyritic lavas which characterize this unit are better developed. The overlying Orkney lavas are characterized by 110ppm>Zr>90ppm. They are tholeiitic andesites of similar composition to the Alberton lavas, but have lower incompatible element levels, higher siderophile element levels, and are of extremely uniform composition. The uppermost Loraine/Edenville lavas range from magnesian tholeiites to tholeiitic andesites. They are distinguished by Zr< 90ppm, and contain the most primitive magmas af the Witwatersrand triad, with up to 17,5% MgO, 2600ppm Cr, 600ppm Ni and M-values up to 77. The most primitive liquids evolved by 38% fractional crystallization of orthopyroxene ∓ chromite, followed by 35% fractional crystallization of an extract containing clinopyroxene and plagioclase. The absence of olivine precipitation is a result of the inherently high Si0₂ content of the magma. The Loraine/Edenville, Orkney and Alberton lavas do not lie on a common liquid line of descent, but are probably consanguinous. The Platberg Group overlies the Kliprivierberg Group, and has a coarse-clastic sedimentary unit, the Kameeldoorns Formation, at the base. Three petrographically distinct porphyritic lava sequences overlie the Kameeldoorns Formation, namely the informal "Goedgenoeg formation", the Makwassie quartz-feldspar porphyries and the Rietgat Formation. Despite petrographic differences, the Goedgenoeg and Rietgat lavas are chemically indistinguishable and thus form a single magma-type. The Makwassie porphyries are dacitic in composition with a high proportion of feldspar and quartz phenocrysts. Rational variation trends are attributed to a nett loss of Si0₂ during secondary alteration. The porphyries are probably of crustal origin. The Goedgenoeg/Rietgat lavas display unusual chemistry and a broad, irrational compositional spectrum. They contain very high incompatible element levels, high nonnative quartz, as well as high MgO, M-values, Cr and Ni relative to the other tholeiitic andesites of the Witwatersrand triad. It is tentatively suggested that they are hybrid magmas containing both crust and mantle components, the former possibly represented by the Makwassie porphyries. Field evidence suggests that Platberg volcanism commenced directly after Klipriviersberg volcanism ceased, and was accompanied by a period of enhanced tectonic activity. The Platberg lavas thus probably reflect a crustal melting cycle associated with the Klipriviersberg magmatic event. The Allanridge lavas are the youngest rocks of the Witwatersrand triad. They are separated from the Platberg Group by a unit of flat-lying sediments, the Bothaville Formation, which was deposited after an extended period of peneplanation. The Allanridge lavas form a separate magma-type. They are tholeiitic andesites of similar composition to the Alberton lavas, but have higher incompatible element levels and are not consanguinous. The compositional similarities amongst the basic magma-types of the Witwatersrand triad suggests that all were generated in an hydrous mantle. Interelement ratio differences between the various magma-types nevertheless support the concept that the mantle was chemically heterogeneous during the early Proterozoic.
- Full Text:
- Date Issued: 1985
- Authors: Bowen, Michael Peter
- Date: 1985
- Subjects: Volcanic rocks , Witwatersrand triad , Klerksdorp , Transvaal , Northwest Province , South Africa , Chemical analysis , Magma , Geology
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4909 , http://hdl.handle.net/10962/d1001569
- Description: Several hundred chemical analyses of early Proterozoic lavas of the Witwatersrand triad (incorporating the Dominion Group, Witwatersrand Supergroup and Ventersdorp Supergroup) in the Klerksdorp area, have revealed the presence of various distinct magma types. These essentially correspond to formally defined lithostratigraphic units, but several inconsistencies have necessitated the use of informal nomenclature. The lavas have been regionally metamorphosed to low-grade, greenschist facies assemblages. Original igneous textures are preserved, despite a metamorphic overprint. Metamorphism has resulted in a certain degree of random chemical remobilization. Ba, Sr, Rb, K₂0, Na₂0 and CaO have been highly mobile, and their usefulness in petrogenetic modelling is extremely limited. In contrast, Zr, Nb, Y, LREE's, Cr, Ni, Ti0₂ P₂0₅ and Al₂0₃ have remained immobile. Ti/Zr and Ti/P ratios together constitute efficient discriminating variables for characterizing the different magma types. Lava compositions range from primitive Mg-rich tholeiites to rhyolites, the bulk being tholeiitic andesites. Al₂0₃ contents do not exceed 15%, a feature which reflects the tholeiitic, as opposed to calcalkaline, character of these lavas. Two magma-types are present within the Dominion Group, which is a typical example of bimodal volcanism. The Dominion basic lavas are overlain by the Dominion acid porphyries, with a limited amount of interfingering. The basic lava suite is highly fractionated, with compositions ranging from Mg-, Cr- and Ni-rich tholeiites (close to primary mantle melts) to evolved tholeiitic andesites. The most primitive liquids evolved by 45% fractional crystallization of hornblende, followed by a further 70% crystallization of an orthopyroxene-plagioclase assemblage containing up to 3% sulphides. The Dominion porphyries are rhyolitic, display very limited compositional variation, and probably represent a crustal melt related to the same magmatic event which produced the basic lavas. The only lavas from the Witwatersrand Supergroup present in the Klerksdorp area are those of the Crown Formation (Jeppestown amygdaloid). These are tholeiitic dacites which display extremely limited compositional variation, and are unrelated to any of the other magmas of the Witwatersrand triad. The Ventersdorp Supergroup comprises 4 magma-types: The Kliprivierberg Group lavas at the base are subdivisible into 3 sub-types on the basis of Zr contents. (Zr>11Oppm) are the most evolved. They are tholeiitic andesites which display fairly limited compositional variation. It is likely that more evolved compositions are present in other areas where the porphyritic lavas which characterize this unit are better developed. The overlying Orkney lavas are characterized by 110ppm>Zr>90ppm. They are tholeiitic andesites of similar composition to the Alberton lavas, but have lower incompatible element levels, higher siderophile element levels, and are of extremely uniform composition. The uppermost Loraine/Edenville lavas range from magnesian tholeiites to tholeiitic andesites. They are distinguished by Zr< 90ppm, and contain the most primitive magmas af the Witwatersrand triad, with up to 17,5% MgO, 2600ppm Cr, 600ppm Ni and M-values up to 77. The most primitive liquids evolved by 38% fractional crystallization of orthopyroxene ∓ chromite, followed by 35% fractional crystallization of an extract containing clinopyroxene and plagioclase. The absence of olivine precipitation is a result of the inherently high Si0₂ content of the magma. The Loraine/Edenville, Orkney and Alberton lavas do not lie on a common liquid line of descent, but are probably consanguinous. The Platberg Group overlies the Kliprivierberg Group, and has a coarse-clastic sedimentary unit, the Kameeldoorns Formation, at the base. Three petrographically distinct porphyritic lava sequences overlie the Kameeldoorns Formation, namely the informal "Goedgenoeg formation", the Makwassie quartz-feldspar porphyries and the Rietgat Formation. Despite petrographic differences, the Goedgenoeg and Rietgat lavas are chemically indistinguishable and thus form a single magma-type. The Makwassie porphyries are dacitic in composition with a high proportion of feldspar and quartz phenocrysts. Rational variation trends are attributed to a nett loss of Si0₂ during secondary alteration. The porphyries are probably of crustal origin. The Goedgenoeg/Rietgat lavas display unusual chemistry and a broad, irrational compositional spectrum. They contain very high incompatible element levels, high nonnative quartz, as well as high MgO, M-values, Cr and Ni relative to the other tholeiitic andesites of the Witwatersrand triad. It is tentatively suggested that they are hybrid magmas containing both crust and mantle components, the former possibly represented by the Makwassie porphyries. Field evidence suggests that Platberg volcanism commenced directly after Klipriviersberg volcanism ceased, and was accompanied by a period of enhanced tectonic activity. The Platberg lavas thus probably reflect a crustal melting cycle associated with the Klipriviersberg magmatic event. The Allanridge lavas are the youngest rocks of the Witwatersrand triad. They are separated from the Platberg Group by a unit of flat-lying sediments, the Bothaville Formation, which was deposited after an extended period of peneplanation. The Allanridge lavas form a separate magma-type. They are tholeiitic andesites of similar composition to the Alberton lavas, but have higher incompatible element levels and are not consanguinous. The compositional similarities amongst the basic magma-types of the Witwatersrand triad suggests that all were generated in an hydrous mantle. Interelement ratio differences between the various magma-types nevertheless support the concept that the mantle was chemically heterogeneous during the early Proterozoic.
- Full Text:
- Date Issued: 1985
Transcending the culture of poverty in a Black South African township
- Authors: Wilsworth, Mercia Joan
- Date: 1979
- Subjects: Black people , South Africa , Grahamstown , Economic conditions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2085 , http://hdl.handle.net/10962/d1001602
- Full Text:
- Date Issued: 1979
- Authors: Wilsworth, Mercia Joan
- Date: 1979
- Subjects: Black people , South Africa , Grahamstown , Economic conditions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2085 , http://hdl.handle.net/10962/d1001602
- Full Text:
- Date Issued: 1979
The evolution of African music and its function in the present day
- Authors: Tracey, Hugh
- Subjects: African Music Society , International Library of African Music , Evolution , African music , Styles , Beauty , Instruments , Perishable material , Lithophones , Nigeria , Stones , Bushman paintings , Chopi , Limpopo , Birds , Imitation , Onomatopaeia , Zimbabwe , Bird calls , Long eared owl , Temple , Nile , Egyptian civilization , Sub-Suharan Africa , Stringed instrument , Indonesian theory , Langauge , Mission , Catholic music , Arabs , Swahili , Portuguese , Brazilian , Guitar , Father Andre Fernandes , Missionary , Dove , Nile Basin Theory , Egypt , Slaves , Musicians , Harps , Lyres , Loots , North East , Sub-Saharan Africa , String , Tanganyika , Sea farers , Xylophone , Congo , Participation , Dance music , Repetitive , Rhythmic , Tradition , Relocation , Intergration , Continuity , English music , Afrikaans music , Sarie Marie , Change , Static , Classics , Popular music , Greensleeves , A Bicycle made for Two , Latin singing , Latin chant , Chant , British Empire , Negro Spiritual , Folk songs , Anti-slavery movements , David Livingstone , Musical migrtatiatioh , Hand piano , Zambezi Valley , Nyasaland , Nguni , Kampala , Bands , Chitimkhulu , Bemba , Blindness , Court band , Blinded musician , South Africa , Choral , Forests , Drums , Xylophones , Fighting song , Agriculture , Semi-nomadic , Politicians , Hastings Banda , Fooding and drinking party , European hymns , Ghana , Degree , Complexity , Simplicity , Poly-rhythms , Rural areas , Churches , Competitions , Eisteddfodd , Inferiority , Johannesburg , Drama , King Kong , Jazz importations , Voice , Skill , Instrument makers , Commercialisation , Gramophone , Radio , Creolisation , Modern Jazz , Louisiana , French , Spanish , Genius , Town songs , Country songs , Social climbers , Patriotism , Kwela , Penny-whistle , America , Politics , Pitch , Archive , BP Southern Africa , Evangelists , Indoor music , Mine , Continuation , Notation , Migration , Study of Man in Africa , Mr. Michael Lane
- Language: English
- Type: Sound , Lecture , Music
- Identifier: vital:15104 , http://hdl.handle.net/10962/d1008532 , Reel number: BC160
- Description: Lecture by Hugh Tracey given for the Institute for the Study of Man in Africa (ISMA) , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
- Authors: Tracey, Hugh
- Subjects: African Music Society , International Library of African Music , Evolution , African music , Styles , Beauty , Instruments , Perishable material , Lithophones , Nigeria , Stones , Bushman paintings , Chopi , Limpopo , Birds , Imitation , Onomatopaeia , Zimbabwe , Bird calls , Long eared owl , Temple , Nile , Egyptian civilization , Sub-Suharan Africa , Stringed instrument , Indonesian theory , Langauge , Mission , Catholic music , Arabs , Swahili , Portuguese , Brazilian , Guitar , Father Andre Fernandes , Missionary , Dove , Nile Basin Theory , Egypt , Slaves , Musicians , Harps , Lyres , Loots , North East , Sub-Saharan Africa , String , Tanganyika , Sea farers , Xylophone , Congo , Participation , Dance music , Repetitive , Rhythmic , Tradition , Relocation , Intergration , Continuity , English music , Afrikaans music , Sarie Marie , Change , Static , Classics , Popular music , Greensleeves , A Bicycle made for Two , Latin singing , Latin chant , Chant , British Empire , Negro Spiritual , Folk songs , Anti-slavery movements , David Livingstone , Musical migrtatiatioh , Hand piano , Zambezi Valley , Nyasaland , Nguni , Kampala , Bands , Chitimkhulu , Bemba , Blindness , Court band , Blinded musician , South Africa , Choral , Forests , Drums , Xylophones , Fighting song , Agriculture , Semi-nomadic , Politicians , Hastings Banda , Fooding and drinking party , European hymns , Ghana , Degree , Complexity , Simplicity , Poly-rhythms , Rural areas , Churches , Competitions , Eisteddfodd , Inferiority , Johannesburg , Drama , King Kong , Jazz importations , Voice , Skill , Instrument makers , Commercialisation , Gramophone , Radio , Creolisation , Modern Jazz , Louisiana , French , Spanish , Genius , Town songs , Country songs , Social climbers , Patriotism , Kwela , Penny-whistle , America , Politics , Pitch , Archive , BP Southern Africa , Evangelists , Indoor music , Mine , Continuation , Notation , Migration , Study of Man in Africa , Mr. Michael Lane
- Language: English
- Type: Sound , Lecture , Music
- Identifier: vital:15104 , http://hdl.handle.net/10962/d1008532 , Reel number: BC160
- Description: Lecture by Hugh Tracey given for the Institute for the Study of Man in Africa (ISMA) , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
The Sound of Africa: Music of the Ciskei
- Authors: Tracey, Hugh , Tracey, Peggy
- Subjects: Grunting , Harmonica , Roaring , Xhosa , Mbayizelo dance , Pedi , Ciskei , Eastern Cape , South Africa , Ritual , Tribal life , Lessons , Initiation , Abakwetha , Greyish-white clay , Blankets , Grass skirts , Dancing , Drums , Singing , Clapping , Party , Beer , Dress , Ochre , Turban , Umngqungqo , Segregation , Vegetation , Aloes , Fighting songs , Stick fights , Mdudo , Stamping , Imaginary events , Conversations , Humour , Fun , Sketch , Ihoba hobo , Diviners , The Weaver bird , Water , Ancestral spirits , Diviner‘s song , Wedding dance , Leggings of beads , Hymn , Ntsikana‘s Hymn , Girls , Teenagers , Masalila , Town , Grahamstown , Isicatulo , Phuma endlu yam , Double bass , Peddi , Kalana , Kraal , Umdudo , Spear , Pole , Theatrical , Impromptu , Weaverbird , Nqika , Mtshotsho dance , Tuku , Afrcian Pavane , Ntsikana‘s Bell
- Language: English
- Type: Sound , Radio broadcast , Music
- Identifier: vital:15086 , http://hdl.handle.net/10962/d1008514 , Reel number: BC078
- Description: 1st programme in ‘The Sound of Africa‘ Series III of illustrated talks by Hugh Tracey and Peggy Tracey on their travels in search of African music, broadcast by the South African Broadcasting Corporation , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
- Authors: Tracey, Hugh , Tracey, Peggy
- Subjects: Grunting , Harmonica , Roaring , Xhosa , Mbayizelo dance , Pedi , Ciskei , Eastern Cape , South Africa , Ritual , Tribal life , Lessons , Initiation , Abakwetha , Greyish-white clay , Blankets , Grass skirts , Dancing , Drums , Singing , Clapping , Party , Beer , Dress , Ochre , Turban , Umngqungqo , Segregation , Vegetation , Aloes , Fighting songs , Stick fights , Mdudo , Stamping , Imaginary events , Conversations , Humour , Fun , Sketch , Ihoba hobo , Diviners , The Weaver bird , Water , Ancestral spirits , Diviner‘s song , Wedding dance , Leggings of beads , Hymn , Ntsikana‘s Hymn , Girls , Teenagers , Masalila , Town , Grahamstown , Isicatulo , Phuma endlu yam , Double bass , Peddi , Kalana , Kraal , Umdudo , Spear , Pole , Theatrical , Impromptu , Weaverbird , Nqika , Mtshotsho dance , Tuku , Afrcian Pavane , Ntsikana‘s Bell
- Language: English
- Type: Sound , Radio broadcast , Music
- Identifier: vital:15086 , http://hdl.handle.net/10962/d1008514 , Reel number: BC078
- Description: 1st programme in ‘The Sound of Africa‘ Series III of illustrated talks by Hugh Tracey and Peggy Tracey on their travels in search of African music, broadcast by the South African Broadcasting Corporation , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false