(In)visibility and the exercise of power: a genealogy of the politics of drag spectacles in a small city in South Africa
- Authors: Marx, Jacqueline Greer
- Date: 2011
- Subjects: Female impersonators -- Research -- South Africa Male impersonators -- Research -- South Africa Apartheid -- South Africa -- Psychological aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3013 , http://hdl.handle.net/10962/d1002522
- Description: This study investigates the politics of homosexual visibility in dressing-up, cross-dressing and drag performances that take place in a small city in South Africa over a period of sixty years, beginning in the 1950s and the inception of apartheid policy, through the socio-political changes in the 1990s to the 21st century post-apartheid context. The study draws on Butler’s notion of performative resistance and adopts a Foucauldian genealogy to examine the conditions that make visibility possible and through which particular representations of homosexuality are articulated and read, or remain unread or misread. Information about dressing-up, cross-dressing and drag performance was obtained in interviews, from documentary evidence, and from audio-visual recordings of drag shows and gay and lesbian beauty pageant competitions. Semiotics and a Foucauldian approach to analysing discourse were used to interpret the written, spoken, and visual texts. In this study I argue that the state prohibition of homosexuality during apartheid meant that people could not admit to knowing about it, and this ‘not knowing’ provided a cover for homosexual behaviour in public. At this time, the threat of being identified was associated with police raids on private parties. In the 1990s, homosexual visibility was more viable than it had been in the past. However, the strategies that were adopted to negotiate public visibility at this time were tailored to appease normative sentiments rather than challenge them. I argue that, historically, race and gender have played a role in diminishing and exacerbating homosexual visibility and its politics. Addressing the potential for harm that is associated with homosexual visibility in the 21st century post-apartheid context, this study considers the circumstances in which invisibility is desirable.
- Full Text:
- Date Issued: 2011
- Authors: Marx, Jacqueline Greer
- Date: 2011
- Subjects: Female impersonators -- Research -- South Africa Male impersonators -- Research -- South Africa Apartheid -- South Africa -- Psychological aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3013 , http://hdl.handle.net/10962/d1002522
- Description: This study investigates the politics of homosexual visibility in dressing-up, cross-dressing and drag performances that take place in a small city in South Africa over a period of sixty years, beginning in the 1950s and the inception of apartheid policy, through the socio-political changes in the 1990s to the 21st century post-apartheid context. The study draws on Butler’s notion of performative resistance and adopts a Foucauldian genealogy to examine the conditions that make visibility possible and through which particular representations of homosexuality are articulated and read, or remain unread or misread. Information about dressing-up, cross-dressing and drag performance was obtained in interviews, from documentary evidence, and from audio-visual recordings of drag shows and gay and lesbian beauty pageant competitions. Semiotics and a Foucauldian approach to analysing discourse were used to interpret the written, spoken, and visual texts. In this study I argue that the state prohibition of homosexuality during apartheid meant that people could not admit to knowing about it, and this ‘not knowing’ provided a cover for homosexual behaviour in public. At this time, the threat of being identified was associated with police raids on private parties. In the 1990s, homosexual visibility was more viable than it had been in the past. However, the strategies that were adopted to negotiate public visibility at this time were tailored to appease normative sentiments rather than challenge them. I argue that, historically, race and gender have played a role in diminishing and exacerbating homosexual visibility and its politics. Addressing the potential for harm that is associated with homosexual visibility in the 21st century post-apartheid context, this study considers the circumstances in which invisibility is desirable.
- Full Text:
- Date Issued: 2011
(Re-)inventing our selves/ourselves : identity and community in contemporary South African short fiction cycles.
- Authors: Marais, Susan Jacqueline
- Date: 2014
- Subjects: South African fiction (English) -- History and criticism , Matlou, Joël -- Criticism and interpretation , Magona, Sindiwe -- Criticism and interpretation , Vladislavić, Ivan, 1957- -- Criticism and interpretation , Wicomb, Zoë -- Criticism and interpretation
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2326 , http://hdl.handle.net/10962/d1016357
- Description: In this study I focus on a number of collections of short fiction by the South African writers Joël Matlou, Sindiwe Magona, Zoë Wicomb and Ivan Vladislavić, all of which evince certain of the characteristics of short story cycles or sequences. In other words, they display what Forrest L. Ingram describes as “a double tendency of asserting the individuality of [their] components on the one hand and of highlighting, on the other, the bonds of unity which make the many into a single whole”. The cycle form, thus defined, is characterised by a paradoxical yet productive and frequently unresolved tension between “the individuality of each of the stories and the necessities of the larger unit”, between “the one and the many”, and between cohesion and fragmentation. It is this “dynamic structure of connection and disconnection” which singularly equips the genre to represent the interrelationship of singular and collective identities, or the “coherent multiplicity of community”. Ingram, for example, asserts that “Numerous and varied connective strands draw the co-protagonists of any story cycle into a single community. … However this community may be achieved, it usually can be said to constitute the central character of a cycle”. Not unsurprisingly, then, in its dominant manifestations over much of the twentieth century the short story cycle demonstrated a marked inclination towards regionalism and the depiction of localised enclaves, and this tendency towards “place-based short story cycles” in which topographical unity is a conspicuous feature was as pronounced in South Africa as elsewhere. However, the specific collections which are my concern here increasingly employ innovative and self-reflexive narrative strategies that unsettle generic expectations and interrogate the notions of regionalism and community conventionally associated with the short story cycle. My investigation seeks to explain this shift in emphasis, and its particular significance within the South African context.
- Full Text:
- Date Issued: 2014
- Authors: Marais, Susan Jacqueline
- Date: 2014
- Subjects: South African fiction (English) -- History and criticism , Matlou, Joël -- Criticism and interpretation , Magona, Sindiwe -- Criticism and interpretation , Vladislavić, Ivan, 1957- -- Criticism and interpretation , Wicomb, Zoë -- Criticism and interpretation
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2326 , http://hdl.handle.net/10962/d1016357
- Description: In this study I focus on a number of collections of short fiction by the South African writers Joël Matlou, Sindiwe Magona, Zoë Wicomb and Ivan Vladislavić, all of which evince certain of the characteristics of short story cycles or sequences. In other words, they display what Forrest L. Ingram describes as “a double tendency of asserting the individuality of [their] components on the one hand and of highlighting, on the other, the bonds of unity which make the many into a single whole”. The cycle form, thus defined, is characterised by a paradoxical yet productive and frequently unresolved tension between “the individuality of each of the stories and the necessities of the larger unit”, between “the one and the many”, and between cohesion and fragmentation. It is this “dynamic structure of connection and disconnection” which singularly equips the genre to represent the interrelationship of singular and collective identities, or the “coherent multiplicity of community”. Ingram, for example, asserts that “Numerous and varied connective strands draw the co-protagonists of any story cycle into a single community. … However this community may be achieved, it usually can be said to constitute the central character of a cycle”. Not unsurprisingly, then, in its dominant manifestations over much of the twentieth century the short story cycle demonstrated a marked inclination towards regionalism and the depiction of localised enclaves, and this tendency towards “place-based short story cycles” in which topographical unity is a conspicuous feature was as pronounced in South Africa as elsewhere. However, the specific collections which are my concern here increasingly employ innovative and self-reflexive narrative strategies that unsettle generic expectations and interrogate the notions of regionalism and community conventionally associated with the short story cycle. My investigation seeks to explain this shift in emphasis, and its particular significance within the South African context.
- Full Text:
- Date Issued: 2014
0 Representation of South African "tribal" culture in soap operas : a content and audience analysis of the series Generations : The Legacy
- Onyenankeya, Oluwayemisi Mary
- Authors: Onyenankeya, Oluwayemisi Mary
- Date: 2018
- Subjects: Television criticism Mass media and culture Mass media--Social aspects
- Language: English
- Type: Thesis , Doctoral , Communication
- Identifier: http://hdl.handle.net/10353/15430 , vital:40407
- Description: Commercial media entertainment offerings in South Africa especially mainstream soap operas, are progressively infusing dominant social values and ideas which are alien to South African tribal societies. In most of the commodified television drama series, people who hold tight to traditional beliefs and values are often characterised as traditionalists, while those who have imbibed the western defined dicta and ideology of modernity are seen as progressives. This study therefore, sought to ascertain how South African tribal language, traditional institutions, values, social norms and ancestral beliefs are portrayed through the television drama, Generations: The Legacy and what the viewers think about those constructions and the implication for cultural identity. The mixed methods approach was employed involving the administration of questionnaire to 350 participants selected through random sampling and a content analysis of 20 episodes of Generations: The Legacy. The findings suggest that Generations: The Legacy tends to portray South African tribal culture negatively (p-value > 0.05). More than half of the respondents (52percent) strongly believe such negative portrayals may erode the cultural identity of black South Africans, 68.6% were of the opinion that Generations: The Legacy gives preference to western culture as against South African tribal culture. The findings further showed that the African values and traditions represented in Generations: The Legacy do not significantly reflect the South African tribal tradition and values (p-value > 0.05). In the few occasions that African traditional values are represented Generations: The Legacy, they tend to be portrayed as old fashioned (p-value > 0.05), and inferior and backward (p-value > 0.05). In addition, the findings indicate that Generations: The Legacy is a vehicle for promoting dominant culture. Nearly, 59percent of the respondents stated that watching Generations: The Legacy affect the way they view South African tribal culture, while 59.1percent indicated that watching Generations: The Legacy has somehow affected their perception of their own cultural identity. In all, participants rated the representation of South African tribal culture as poor. The study concludes that while South African tribal culture is increasingly finding expression on mainstream soap opera, tribal South African values and beliefs are often depicted as old-fashioned, and inimical to modernisation, and individual’s freedom.
- Full Text:
- Date Issued: 2018
- Authors: Onyenankeya, Oluwayemisi Mary
- Date: 2018
- Subjects: Television criticism Mass media and culture Mass media--Social aspects
- Language: English
- Type: Thesis , Doctoral , Communication
- Identifier: http://hdl.handle.net/10353/15430 , vital:40407
- Description: Commercial media entertainment offerings in South Africa especially mainstream soap operas, are progressively infusing dominant social values and ideas which are alien to South African tribal societies. In most of the commodified television drama series, people who hold tight to traditional beliefs and values are often characterised as traditionalists, while those who have imbibed the western defined dicta and ideology of modernity are seen as progressives. This study therefore, sought to ascertain how South African tribal language, traditional institutions, values, social norms and ancestral beliefs are portrayed through the television drama, Generations: The Legacy and what the viewers think about those constructions and the implication for cultural identity. The mixed methods approach was employed involving the administration of questionnaire to 350 participants selected through random sampling and a content analysis of 20 episodes of Generations: The Legacy. The findings suggest that Generations: The Legacy tends to portray South African tribal culture negatively (p-value > 0.05). More than half of the respondents (52percent) strongly believe such negative portrayals may erode the cultural identity of black South Africans, 68.6% were of the opinion that Generations: The Legacy gives preference to western culture as against South African tribal culture. The findings further showed that the African values and traditions represented in Generations: The Legacy do not significantly reflect the South African tribal tradition and values (p-value > 0.05). In the few occasions that African traditional values are represented Generations: The Legacy, they tend to be portrayed as old fashioned (p-value > 0.05), and inferior and backward (p-value > 0.05). In addition, the findings indicate that Generations: The Legacy is a vehicle for promoting dominant culture. Nearly, 59percent of the respondents stated that watching Generations: The Legacy affect the way they view South African tribal culture, while 59.1percent indicated that watching Generations: The Legacy has somehow affected their perception of their own cultural identity. In all, participants rated the representation of South African tribal culture as poor. The study concludes that while South African tribal culture is increasingly finding expression on mainstream soap opera, tribal South African values and beliefs are often depicted as old-fashioned, and inimical to modernisation, and individual’s freedom.
- Full Text:
- Date Issued: 2018
5-hydroxytryptamine and sexual behaviour in rhesus monkeys
- Authors: Gradwell, Peter Bertram
- Date: 1976
- Subjects: Rhesus monkey -- Behavior Sexual behavior in animals
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3210 , http://hdl.handle.net/10962/d1012086
- Description: Selective inhibition of 5-hydroxytryptamine by parachlorophenylalanine (PCPA) is able to restore sexual receptivity in female rhesus monkeys made unreceptive by bilateral adrenalectomy. PCPA in the doses used reduces the levels of 5-hydroxyindoleacetic acid (5HIAA) in the cerebrospinal fluid to 40 per cent of the normal oestradioltreated condition. Both the increased sexual receptivity and the lowered 5HIAA levels "in the CSF are in turn reversed by 5-hydroxytryptophal (5HTP), the irrmediate precursor of 5HT and the substance whose synthesis is inhibited by PCPA. 5HTP on its own reduces sexual receptivity and increases 5HIAA levels in the CSF of ovariectomised, oestradiol-treated (but otherwise intact) female rhesus monkeys. A substance other than an adrenal androgen has therefore been shown to restore sexual receptivity in adrenalectomised female monkeys . Testosterone propionate and oestradiol benzoate both lower the turnover rates of 5HT in the brains of ovariectomised female monkeys, as measured by the 2 hour probenecid test. Taken together, these findings suggest that adrenal androgens could act on specific sites in the female monkey brain via 5HT-containing neural systems, to control (or at least influence) sexual receptivity. All the results of administering oestradiol to ovariectomised monkeys in these experiments are consistent with the established roles of this hormone in female sexual attractiveness and in the gonadotrophin- controlling systems of the hypothalamo-hypophyseal axis. In contrast to these findings on 5HT and sexual receptivity in female monkeys, no clear role for 5HT- containing neural systems could be demonstrated in the grooming, aggressive or social behaviours of female monkeys. No clear role for 5HT could be demonstrated in the refractory period following ejaculation in male monkeys , or when testosterone replacement is given to castrated male monkeys.
- Full Text:
- Date Issued: 1976
- Authors: Gradwell, Peter Bertram
- Date: 1976
- Subjects: Rhesus monkey -- Behavior Sexual behavior in animals
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3210 , http://hdl.handle.net/10962/d1012086
- Description: Selective inhibition of 5-hydroxytryptamine by parachlorophenylalanine (PCPA) is able to restore sexual receptivity in female rhesus monkeys made unreceptive by bilateral adrenalectomy. PCPA in the doses used reduces the levels of 5-hydroxyindoleacetic acid (5HIAA) in the cerebrospinal fluid to 40 per cent of the normal oestradioltreated condition. Both the increased sexual receptivity and the lowered 5HIAA levels "in the CSF are in turn reversed by 5-hydroxytryptophal (5HTP), the irrmediate precursor of 5HT and the substance whose synthesis is inhibited by PCPA. 5HTP on its own reduces sexual receptivity and increases 5HIAA levels in the CSF of ovariectomised, oestradiol-treated (but otherwise intact) female rhesus monkeys. A substance other than an adrenal androgen has therefore been shown to restore sexual receptivity in adrenalectomised female monkeys . Testosterone propionate and oestradiol benzoate both lower the turnover rates of 5HT in the brains of ovariectomised female monkeys, as measured by the 2 hour probenecid test. Taken together, these findings suggest that adrenal androgens could act on specific sites in the female monkey brain via 5HT-containing neural systems, to control (or at least influence) sexual receptivity. All the results of administering oestradiol to ovariectomised monkeys in these experiments are consistent with the established roles of this hormone in female sexual attractiveness and in the gonadotrophin- controlling systems of the hypothalamo-hypophyseal axis. In contrast to these findings on 5HT and sexual receptivity in female monkeys, no clear role for 5HT- containing neural systems could be demonstrated in the grooming, aggressive or social behaviours of female monkeys. No clear role for 5HT could be demonstrated in the refractory period following ejaculation in male monkeys , or when testosterone replacement is given to castrated male monkeys.
- Full Text:
- Date Issued: 1976
A "lean-led-evaluation" of infrastructure development improvement programme in South Africa
- Monyane, Thabiso Godfrey, Emuze, Fidelis
- Authors: Monyane, Thabiso Godfrey , Emuze, Fidelis
- Date: 2019
- Subjects: Construction industry -- Accounting , Construction industry -- South Africa Project management -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/44929 , vital:38189
- Description: A doctoral study was embarked upon with the intentions of addressing cost management problems encountered on Infrastructure Delivery Projects in South Africa. Given that poor cost performance constitute hindrance to the realization of project goals, it is imperative to eliminate it from project delivery. The prevalence of cost overrun in public sector projects is a call to all stakeholders to address cost management issues in the construction industry. The predominance of cost overruns in public sector construction projects in South Africa has been observed. With the decline of the current economic conditions in South Africa, project performance is a great concern that needs attention. In addition, ineffective initiatives to curb the abuse of the procurement processes are directly affecting the outcomes of construction projects, and if these status quo remains, the sector will continue to have a bad image and continued waste of taxpayers’ money will not cease until the public sector remove non-value adding activities in their operations. Study adopted a mixed methods designed that collected both textual and statistical data. Semistructured interviews were undertaken to determine the outcomes of current project management practices in South Africa. In terms of performance of projects, the status quo paints a disconsolate picture. Findings reveal protracted processes, and the use of unqualified and inexperienced contribute to poor performance of public sector projects. Poor performance continues to dominate the construction sector, especially in the public sector. Interviews data were contrasted with evidence from project-related documents. Based on the data, the study produces a vignette of existing cost management frameworks applied to such projects. Encompassing various stages of the project delivery lifecycle, this vignette will enable an identification of the challenges afflicting cost management on projects. Accordingly, this study identified Lean opportunities from existing cost management practices. Such opportunities will enable identification of effective cost management during project delivery. There appears a need for collaborative cost management practices. Lean tools mentioned for improvement include the 5Whys, the big room, target value design, and the integration of design and construction. A collaborative cost management framework was developed through relevant theories to improve the cost management process of public sector projects.
- Full Text:
- Date Issued: 2019
- Authors: Monyane, Thabiso Godfrey , Emuze, Fidelis
- Date: 2019
- Subjects: Construction industry -- Accounting , Construction industry -- South Africa Project management -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/44929 , vital:38189
- Description: A doctoral study was embarked upon with the intentions of addressing cost management problems encountered on Infrastructure Delivery Projects in South Africa. Given that poor cost performance constitute hindrance to the realization of project goals, it is imperative to eliminate it from project delivery. The prevalence of cost overrun in public sector projects is a call to all stakeholders to address cost management issues in the construction industry. The predominance of cost overruns in public sector construction projects in South Africa has been observed. With the decline of the current economic conditions in South Africa, project performance is a great concern that needs attention. In addition, ineffective initiatives to curb the abuse of the procurement processes are directly affecting the outcomes of construction projects, and if these status quo remains, the sector will continue to have a bad image and continued waste of taxpayers’ money will not cease until the public sector remove non-value adding activities in their operations. Study adopted a mixed methods designed that collected both textual and statistical data. Semistructured interviews were undertaken to determine the outcomes of current project management practices in South Africa. In terms of performance of projects, the status quo paints a disconsolate picture. Findings reveal protracted processes, and the use of unqualified and inexperienced contribute to poor performance of public sector projects. Poor performance continues to dominate the construction sector, especially in the public sector. Interviews data were contrasted with evidence from project-related documents. Based on the data, the study produces a vignette of existing cost management frameworks applied to such projects. Encompassing various stages of the project delivery lifecycle, this vignette will enable an identification of the challenges afflicting cost management on projects. Accordingly, this study identified Lean opportunities from existing cost management practices. Such opportunities will enable identification of effective cost management during project delivery. There appears a need for collaborative cost management practices. Lean tools mentioned for improvement include the 5Whys, the big room, target value design, and the integration of design and construction. A collaborative cost management framework was developed through relevant theories to improve the cost management process of public sector projects.
- Full Text:
- Date Issued: 2019
A best practice guideline for a healthy work environment for professional nurses working in the South African Military Health Service
- Authors: Mabona, Jean Fezeka Madi
- Date: 2018
- Subjects: Nurses -- Employment -- South Africa , Medicine, Military -- South Africa South Africa -- National Defence Force -- Medical care , Work environment -- National Defence Force -- Medical care
- Language: English
- Type: Thesis , Doctoral , DCur
- Identifier: http://hdl.handle.net/10948/30811 , vital:31146
- Description: Governments, internationally and nationally, are becoming aware of the importance of healthy work environments within their health departments, environments that are caring and supportive to health professionals. This awareness is brought about by the mounting evidence that healthy work environments are critical to recruiting and retaining health professionals. On the other hand, unhealthy work environments can contribute to medical errors, ineffective delivery of care, and conflict and stress among health professionals in the clinical setting and faculty shortage that can compromise academic excellence in the academic setting. The professional nurses working in the South African Military Health Service (SAMHS), a branch of the South African National Defence Force (SANDF) could experience the military environment as unhealthy because it is rigid and controlled. The hierarchical rank structure could deprive them of their autonomy as the decision-making powers are directly proportional to the rank. Stressful conditions could be experienced when these professional nurses are taken away from the well equipped hospital environment to the deployment areas away from home. There was, however, no evidence found on the work environment of professional nurses in the SAMHS during literature review. The aim of the study is therefore to explore and describe the experiences of professional nurses working in the SAMHS and their understanding of a healthy work environment and the scope and nature of a best practice guideline, then to integrate the evidence generated to the evidence emanating from the critical appraisal of the existing best practice guidelines from other health settings in order to develop a best practice guideline for a healthy work environment for nurses in the SAMHS. The study adopted a qualitative, exploratory, descriptive and contextual research design. The research study was made up of three phases. In Phase 1, semi-structured interviews were conducted with professional nurses to collect information on their experiences of working in the SAMHS and their understanding of evidence-based best practice guidelines. The interviews were transcribed by an independent transcriptionist and data analyzed using the eight steps of data analysis as suggested by Tesch. Themes were identified and grouped together to form new categories. The process of coding was supported by an independent coder. Lincoln and Guba’s model of Page | vii trustworthiness consisting of credibility, transferability, dependability and confirmability was used to ensure the validity of the study. An integrative literature review was conducted where the existing evidence-based best practice guidelines for healthy work environment for nurses were searched for, appraised, had data extracted and were synthesized in Phase 2. In Phase 3, evidence generated in Phase 1 and Phase 2 was triangulated, forming recommendations that were utilized to develop a best practice draft guideline for a healthy work environment for professional nurses working in the SAMHS. The draft guideline was sent to five expert reviewers for their comments and recommendations. These were considered in the development of the final guideline. The final guideline consists of several recommendations in four themes: the need for effective leadership to create an empowering environment; effective communication amongst members of the health team; a culture that supports team work, and; the need for an environment that promotes professional autonomy. Further recommendations were made to address factors that impact negatively on enhancement of a healthy work environment. The guideline is intended for use by SAMHS’ leadership, at Levels 2, the strategic level, Level 3, the formation level and Level 4, the unit level (hospitals, sickbays and clinics and nursing college) and all professional nurses working in all the military health institutions of the SAMHS, including the military clinics, sickbays and hospitals irrespective of positions. However, the guideline may also be adapted by nursing institutions outside the military such as public and private hospitals and clinics where they find it applicable. Results
- Full Text:
- Date Issued: 2018
- Authors: Mabona, Jean Fezeka Madi
- Date: 2018
- Subjects: Nurses -- Employment -- South Africa , Medicine, Military -- South Africa South Africa -- National Defence Force -- Medical care , Work environment -- National Defence Force -- Medical care
- Language: English
- Type: Thesis , Doctoral , DCur
- Identifier: http://hdl.handle.net/10948/30811 , vital:31146
- Description: Governments, internationally and nationally, are becoming aware of the importance of healthy work environments within their health departments, environments that are caring and supportive to health professionals. This awareness is brought about by the mounting evidence that healthy work environments are critical to recruiting and retaining health professionals. On the other hand, unhealthy work environments can contribute to medical errors, ineffective delivery of care, and conflict and stress among health professionals in the clinical setting and faculty shortage that can compromise academic excellence in the academic setting. The professional nurses working in the South African Military Health Service (SAMHS), a branch of the South African National Defence Force (SANDF) could experience the military environment as unhealthy because it is rigid and controlled. The hierarchical rank structure could deprive them of their autonomy as the decision-making powers are directly proportional to the rank. Stressful conditions could be experienced when these professional nurses are taken away from the well equipped hospital environment to the deployment areas away from home. There was, however, no evidence found on the work environment of professional nurses in the SAMHS during literature review. The aim of the study is therefore to explore and describe the experiences of professional nurses working in the SAMHS and their understanding of a healthy work environment and the scope and nature of a best practice guideline, then to integrate the evidence generated to the evidence emanating from the critical appraisal of the existing best practice guidelines from other health settings in order to develop a best practice guideline for a healthy work environment for nurses in the SAMHS. The study adopted a qualitative, exploratory, descriptive and contextual research design. The research study was made up of three phases. In Phase 1, semi-structured interviews were conducted with professional nurses to collect information on their experiences of working in the SAMHS and their understanding of evidence-based best practice guidelines. The interviews were transcribed by an independent transcriptionist and data analyzed using the eight steps of data analysis as suggested by Tesch. Themes were identified and grouped together to form new categories. The process of coding was supported by an independent coder. Lincoln and Guba’s model of Page | vii trustworthiness consisting of credibility, transferability, dependability and confirmability was used to ensure the validity of the study. An integrative literature review was conducted where the existing evidence-based best practice guidelines for healthy work environment for nurses were searched for, appraised, had data extracted and were synthesized in Phase 2. In Phase 3, evidence generated in Phase 1 and Phase 2 was triangulated, forming recommendations that were utilized to develop a best practice draft guideline for a healthy work environment for professional nurses working in the SAMHS. The draft guideline was sent to five expert reviewers for their comments and recommendations. These were considered in the development of the final guideline. The final guideline consists of several recommendations in four themes: the need for effective leadership to create an empowering environment; effective communication amongst members of the health team; a culture that supports team work, and; the need for an environment that promotes professional autonomy. Further recommendations were made to address factors that impact negatively on enhancement of a healthy work environment. The guideline is intended for use by SAMHS’ leadership, at Levels 2, the strategic level, Level 3, the formation level and Level 4, the unit level (hospitals, sickbays and clinics and nursing college) and all professional nurses working in all the military health institutions of the SAMHS, including the military clinics, sickbays and hospitals irrespective of positions. However, the guideline may also be adapted by nursing institutions outside the military such as public and private hospitals and clinics where they find it applicable. Results
- Full Text:
- Date Issued: 2018
A best practice guideline for clinical teaching at a public college of nursing
- Authors: Gcawu, Sybil Nyameka
- Date: 2018
- Subjects: Nursing -- Study and teaching , Clinical medicine Medicine -- Study and teaching
- Language: English
- Type: Thesis , Doctoral , DCur
- Identifier: http://hdl.handle.net/10948/30194 , vital:30860
- Description: Clinical teaching is a critical component of the education and training of undergraduate nursing students. It determines the level of clinical competence that nursing students achieve during their studies. It should be informed by current best practice evidence available in the nursing care literature (Emanuel, Day, Diegnan & Prys-Muller, 2011:21-22). Clinical teaching is centred around provision of patient care in clinical practice. It takes place through an interaction between the nurse educator and the nursing students. During this process nursing students are moulded so they can demonstrate minimum competency in order to be registered by the regulatory body. Nursing students learn to become competent nurses in the clinical learning environment (Baxter 2006; Nash, 2007 in Franklin, 2013:35). In South Africa nurse educators are required to be fully responsible for clinical teaching through the use of appropriate teaching approaches and learning facilitation techniques (RSA DoH, 2013:91). The overall purpose of the current research study was to explore and describe the current clinical teaching practices of nurse educators; to search, appraise, extract and synthesise literature related to clinical teaching in nursing; and to develop A Best Practice Guideline for Clinical Teaching at a Public College of Nursing in the Eastern Cape Province. This had to be realized in three phases. In Phase One a quantitative, exploratory, descriptive and contextual study was conducted. A structured questionnaire was used to collect data from the nurse educators involved in clinical teaching within the Diploma in Nursing (General, Community, Psychiatric) and Midwifery programme. The data analysed was used as the basis of Phase Two—namely, an integrative literature review of evidence pertaining to the clinical teaching practices of nurse educators doing clinical teaching within the undergraduate programmes. The evidence from Phases One and Two was used to develop a draft Best Practice Guideline. The draft guideline was reviewed by a group of expert reviewers and their suggestions were incorporated in the final guideline. Ethical considerations were maintained throughout the research study. The rigour of the research process was ensured by cognitive testing of the questionnaire, and by critical appraisal of the literature accessed from an integrative literature review. The v authenticity of critical appraisal was ensured by having the critical appraisal done by the researcher and an independent reviewer.
- Full Text:
- Date Issued: 2018
- Authors: Gcawu, Sybil Nyameka
- Date: 2018
- Subjects: Nursing -- Study and teaching , Clinical medicine Medicine -- Study and teaching
- Language: English
- Type: Thesis , Doctoral , DCur
- Identifier: http://hdl.handle.net/10948/30194 , vital:30860
- Description: Clinical teaching is a critical component of the education and training of undergraduate nursing students. It determines the level of clinical competence that nursing students achieve during their studies. It should be informed by current best practice evidence available in the nursing care literature (Emanuel, Day, Diegnan & Prys-Muller, 2011:21-22). Clinical teaching is centred around provision of patient care in clinical practice. It takes place through an interaction between the nurse educator and the nursing students. During this process nursing students are moulded so they can demonstrate minimum competency in order to be registered by the regulatory body. Nursing students learn to become competent nurses in the clinical learning environment (Baxter 2006; Nash, 2007 in Franklin, 2013:35). In South Africa nurse educators are required to be fully responsible for clinical teaching through the use of appropriate teaching approaches and learning facilitation techniques (RSA DoH, 2013:91). The overall purpose of the current research study was to explore and describe the current clinical teaching practices of nurse educators; to search, appraise, extract and synthesise literature related to clinical teaching in nursing; and to develop A Best Practice Guideline for Clinical Teaching at a Public College of Nursing in the Eastern Cape Province. This had to be realized in three phases. In Phase One a quantitative, exploratory, descriptive and contextual study was conducted. A structured questionnaire was used to collect data from the nurse educators involved in clinical teaching within the Diploma in Nursing (General, Community, Psychiatric) and Midwifery programme. The data analysed was used as the basis of Phase Two—namely, an integrative literature review of evidence pertaining to the clinical teaching practices of nurse educators doing clinical teaching within the undergraduate programmes. The evidence from Phases One and Two was used to develop a draft Best Practice Guideline. The draft guideline was reviewed by a group of expert reviewers and their suggestions were incorporated in the final guideline. Ethical considerations were maintained throughout the research study. The rigour of the research process was ensured by cognitive testing of the questionnaire, and by critical appraisal of the literature accessed from an integrative literature review. The v authenticity of critical appraisal was ensured by having the critical appraisal done by the researcher and an independent reviewer.
- Full Text:
- Date Issued: 2018
A best practice guideline for patient-centred care in public hospitals in Nelson Mandela Bay
- Authors: Jardien-Baboo, Sihaam
- Date: 2014
- Subjects: Patient-centered health care -- South Africa -- Nelson Mandela Bay Municipality , Evidence-based medicine -- South Africa -- Nelson Mandela Bay Municipality , Public health nurses -- South Africa -- Nelson Mandela Bay Municipality , Public hospitals -- South Africa -- Nelson Mandela Bay Municipality
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:10063 , http://hdl.handle.net/10948/d1020370
- Description: In South Africa, the quality of health care is directly related to the concept of patient-centred care and the enactment of the Batho Pele Principles and the Patients’ Rights Charter. The quality of health care delivery has dropped drastically, and reports in the media indicate that public hospitals in the Eastern Cape Province are on the brink of collapse, with thousands of patients being treated in condemned hospitals. Receiving and rendering health care in the face of such challenges, the question arose: “Are patients receiving patient-centred care in public hospitals?” The answer to this rhetorical inquiry appeared to be obvious, but this research study explored and described professional nurses’ perceptions of patient-centred care in public hospitals and their understanding of evidence-based practice and best practice guidelines. The proposed study followed a qualitative, exploratory, descriptive and contextual design. The research population included professional nurses who are employed in public hospitals in Nelson Mandela Bay, and consisted of nurse managers and nurses who work in the wards. The research study consisted of three phases. In Phase 1, semi-structured interviews and focus groups were conducted with nurse managers and professional nurses working in the wards in order to collect data about their perceptions of patient-centred care and their understanding of evidence-based practice and best practice guidelines. The interviews were transcribed and Tesch’s eight steps of data analysis were followed to create meaning from the data collected. Themes were identified and grouped together to form new categories. The researcher ensured the validity of the study by conforming to Lincoln and Guba’s model of trustworthiness, which consists of the following four constructs: credibility, transferability, dependability and confirmability. An independent coder assisted with the coding process. In Phase 2, an integrative literature review was conducted in order to identify previous guidelines regarding best practice for patient-centred care. Relevant guidelines were selected, critically appraised, data was extracted and synthesised for the development of a best practice guideline for patient-centred care. An independent appraiser critically appraised the guidelines, thereby ensuring trustworthiness. In Phase 3, the data in Phase 1 and Phase 2 were integrated to formulate a draft best practice guideline for patient-centred care. The guideline was submitted to an expert panel for review and was modified according to the recommendations of the panel, whereby the best practice guideline for patient-centred care in public hospitals in Nelson Mandela Bay was finalized.
- Full Text:
- Date Issued: 2014
- Authors: Jardien-Baboo, Sihaam
- Date: 2014
- Subjects: Patient-centered health care -- South Africa -- Nelson Mandela Bay Municipality , Evidence-based medicine -- South Africa -- Nelson Mandela Bay Municipality , Public health nurses -- South Africa -- Nelson Mandela Bay Municipality , Public hospitals -- South Africa -- Nelson Mandela Bay Municipality
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:10063 , http://hdl.handle.net/10948/d1020370
- Description: In South Africa, the quality of health care is directly related to the concept of patient-centred care and the enactment of the Batho Pele Principles and the Patients’ Rights Charter. The quality of health care delivery has dropped drastically, and reports in the media indicate that public hospitals in the Eastern Cape Province are on the brink of collapse, with thousands of patients being treated in condemned hospitals. Receiving and rendering health care in the face of such challenges, the question arose: “Are patients receiving patient-centred care in public hospitals?” The answer to this rhetorical inquiry appeared to be obvious, but this research study explored and described professional nurses’ perceptions of patient-centred care in public hospitals and their understanding of evidence-based practice and best practice guidelines. The proposed study followed a qualitative, exploratory, descriptive and contextual design. The research population included professional nurses who are employed in public hospitals in Nelson Mandela Bay, and consisted of nurse managers and nurses who work in the wards. The research study consisted of three phases. In Phase 1, semi-structured interviews and focus groups were conducted with nurse managers and professional nurses working in the wards in order to collect data about their perceptions of patient-centred care and their understanding of evidence-based practice and best practice guidelines. The interviews were transcribed and Tesch’s eight steps of data analysis were followed to create meaning from the data collected. Themes were identified and grouped together to form new categories. The researcher ensured the validity of the study by conforming to Lincoln and Guba’s model of trustworthiness, which consists of the following four constructs: credibility, transferability, dependability and confirmability. An independent coder assisted with the coding process. In Phase 2, an integrative literature review was conducted in order to identify previous guidelines regarding best practice for patient-centred care. Relevant guidelines were selected, critically appraised, data was extracted and synthesised for the development of a best practice guideline for patient-centred care. An independent appraiser critically appraised the guidelines, thereby ensuring trustworthiness. In Phase 3, the data in Phase 1 and Phase 2 were integrated to formulate a draft best practice guideline for patient-centred care. The guideline was submitted to an expert panel for review and was modified according to the recommendations of the panel, whereby the best practice guideline for patient-centred care in public hospitals in Nelson Mandela Bay was finalized.
- Full Text:
- Date Issued: 2014
A best practice guideline for screening and managing chorioamnionitis
- Authors: Du Plessis, Allison Herlene
- Date: 2020
- Subjects: Bacterial diseases
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/46374 , vital:39575
- Description: Due to the complex nature of chorioamnionitis, women are often misdiagnosed, undiagnosed or only diagnosed after birth when it is too late to prevent maternal and neonatal complications. A lack of a comprehensive best practice guidelinefor screening and managing women withchorioamnionitis resultsin delayed treatment and management that could minimise maternal and neonatal complications. Saving Babiesreported that unexplained intra-uterine deathsremained the main primary (obstetric) cause of death for babies with a weight above 1000g (24.4%of all deaths). Of these unexplained uterine deaths, 33% are of normal birth weight (>2500g), and,therefore,most likely term gestation. Saving Babies further reported that 22.9% of all live births in South Africa was premature and 22.8% of birthswere unexplained intra-uterine deaths. Prematurity is one major complication of chorioamnionitis. When susceptibility for chorioamnionitis is considered during early pregnancy, it is possible to intervene and prevent or even reduce the incidences and complications of chorioamnionitis.A qualitative research study was conducted in three phases. In Phase One(Part One), a theoretically constructed patient scenario of chorioamnionitis was presented to ten midwives,and semi-structured individual interviews were done to elicit information regarding how they screen for and manage chorioamnionitis. In Phase One(Part Two), experienced medical practitioners in the field of obstetrics and gynaecology were individually interviewed, also using semi-structured individual interviewsto gain their views regarding chorioamnionitis as a contributing factor to maternal morbidity and mortality. Qualitative findings in Phase Oneindicated that there is a general lack of knowledge regarding chorioamnionitis among midwives, resulting ininadequate screening, misdiagnosis and mismanagement of the condition. Experienced medical practitioners confirmed that chorioamnionitis is underdiagnosed, misdiagnosed or undiagnosed and underreported,and they hold views that it is difficult to treat and control pregnancy-related infections according to current practice.An integrative literature review was conductedin Phase Twoand literature regarding diagnostic biomarkers, screening options to diagnose chorioamnionitis and management of chorioamnionitis were extracted. After evidence synthesisofPhase Oneand Phase Twodata, a best practice guidelinefor screening and managing viiwomen withchorioamnionitiswas developed usingthe National Institute for Health and Clinical Excellence guideline development approach in Phase Three. The purpose of the best practice guideline for screening and managing women with chorioamnionitis was to provide a guideline onhow to manage women who are at risk and those who present with signs and symptoms of chorioamnionitis at any stage during their pregnancy. Five recommendations were made that involve screening for chorioamnionitisand causative factors, biomarkers to diagnose chorioamnionitis, management of chorioamnionitis that includes pharmacological and non-pharmacological management, and health education to women.Ethics for this research study were guided by the ethical principles and guidelines of the Belmont Report. The trustworthiness of this research study was adopted from Ravitch and Carl,and was based on criticality, reflexivity, collaboration, and rigour. An independent coder and reviewer wereto verify the data that were included in the best practice guideline. Expert reviewersappraised the best practice guidelineusing Appraisal of Guidelines for Research and Evaluation II tools.
- Full Text:
- Date Issued: 2020
- Authors: Du Plessis, Allison Herlene
- Date: 2020
- Subjects: Bacterial diseases
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/46374 , vital:39575
- Description: Due to the complex nature of chorioamnionitis, women are often misdiagnosed, undiagnosed or only diagnosed after birth when it is too late to prevent maternal and neonatal complications. A lack of a comprehensive best practice guidelinefor screening and managing women withchorioamnionitis resultsin delayed treatment and management that could minimise maternal and neonatal complications. Saving Babiesreported that unexplained intra-uterine deathsremained the main primary (obstetric) cause of death for babies with a weight above 1000g (24.4%of all deaths). Of these unexplained uterine deaths, 33% are of normal birth weight (>2500g), and,therefore,most likely term gestation. Saving Babies further reported that 22.9% of all live births in South Africa was premature and 22.8% of birthswere unexplained intra-uterine deaths. Prematurity is one major complication of chorioamnionitis. When susceptibility for chorioamnionitis is considered during early pregnancy, it is possible to intervene and prevent or even reduce the incidences and complications of chorioamnionitis.A qualitative research study was conducted in three phases. In Phase One(Part One), a theoretically constructed patient scenario of chorioamnionitis was presented to ten midwives,and semi-structured individual interviews were done to elicit information regarding how they screen for and manage chorioamnionitis. In Phase One(Part Two), experienced medical practitioners in the field of obstetrics and gynaecology were individually interviewed, also using semi-structured individual interviewsto gain their views regarding chorioamnionitis as a contributing factor to maternal morbidity and mortality. Qualitative findings in Phase Oneindicated that there is a general lack of knowledge regarding chorioamnionitis among midwives, resulting ininadequate screening, misdiagnosis and mismanagement of the condition. Experienced medical practitioners confirmed that chorioamnionitis is underdiagnosed, misdiagnosed or undiagnosed and underreported,and they hold views that it is difficult to treat and control pregnancy-related infections according to current practice.An integrative literature review was conductedin Phase Twoand literature regarding diagnostic biomarkers, screening options to diagnose chorioamnionitis and management of chorioamnionitis were extracted. After evidence synthesisofPhase Oneand Phase Twodata, a best practice guidelinefor screening and managing viiwomen withchorioamnionitiswas developed usingthe National Institute for Health and Clinical Excellence guideline development approach in Phase Three. The purpose of the best practice guideline for screening and managing women with chorioamnionitis was to provide a guideline onhow to manage women who are at risk and those who present with signs and symptoms of chorioamnionitis at any stage during their pregnancy. Five recommendations were made that involve screening for chorioamnionitisand causative factors, biomarkers to diagnose chorioamnionitis, management of chorioamnionitis that includes pharmacological and non-pharmacological management, and health education to women.Ethics for this research study were guided by the ethical principles and guidelines of the Belmont Report. The trustworthiness of this research study was adopted from Ravitch and Carl,and was based on criticality, reflexivity, collaboration, and rigour. An independent coder and reviewer wereto verify the data that were included in the best practice guideline. Expert reviewersappraised the best practice guidelineusing Appraisal of Guidelines for Research and Evaluation II tools.
- Full Text:
- Date Issued: 2020
A best-practice guideline for facilitating adherence to anti-retroviral therapy for persons attending public hospitals in Ghana
- Authors: Agyeman-Yeboah, Joana
- Date: 2017
- Subjects: HIV infections -- Treatment -- Ghana , Health services administration -- Ghana Public health -- Ghana Hospital care -- Ghana
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/13603 , vital:27256
- Description: The retention of persons on an HIV programme has been a global challenge. The success of any strategy to optimize adherence to anti-retroviral therapy (ART) depends on the intensive and effective adherence counselling and strategies. It is important to research whether persons receiving anti-retroviral therapy in public hospitals in Ghana are receiving the needed service that would optimize their adherence to the anti-retroviral therapy. Therefore, this study explored and described the experiences of healthcare professionals providing care, support and guidance to persons on ART at public hospitals in Ghana, as well as the best-practice guideline that could contribute to facilitating the ART adherence of patients. This study also explored and described the experiences of persons living with Human Immunodeficiency Virus/Acquired Immunodeficiency Syndrome (HIV/AIDS) on ART, regarding their adherence to the therapy. The study was organized into three phases. In Phase One: a qualitative, exploratory, descriptive and contextual design was employed. The research population included healthcare professionals, providing services at the HIV clinic at the public hospitals in Ghana, namely the Korle-Bu Teaching Hospital; the 37 Military Hospital and the Ridge Hospital. The healthcare professionals comprised of doctors, nurses, pharmacists and trained counsellors employed in any of the three public hospitals. Persons receiving ART at any of the three public hospitals were also part of the research population. Semi-structured interviews were conducted with healthcare professionals and persons receiving ART. Data were collected from healthcare professionals in relation to their experiences regarding the provision of ART services, their understanding of evidence-based practice and best-practice guidelines, as well as data on the experiences of persons receiving ART in relation to their adherence to the therapy. The data were analysed using Creswell’s six steps of data analysis; and the coding of the data was done according to Tesch’s eight steps of coding. Trustworthiness was ensured by using Lincoln and Guba’s framework which comprised credibility, transferability, dependability, confirmability and authenticity. Ethical principles such as beneficence and non-maleficence, respect for human dignity, justice, veracity, privacy and confidentiality were considered in the study. In phase two, the literature was searched by using an integrative literature review approach and critically appraising the methodological quality of the guidelines in order to identify the best available evidence related to adherence to ART. In Phase Three, a best-practice guideline for facilitating adherence to ART was developed for public hospitals in Ghana based on the findings of the empirical research of Phase One and the integrative literature review in Phase Two. The guideline was submitted to an expert panel for review; and it was modified, according to the recommendations of the panel.
- Full Text:
- Date Issued: 2017
- Authors: Agyeman-Yeboah, Joana
- Date: 2017
- Subjects: HIV infections -- Treatment -- Ghana , Health services administration -- Ghana Public health -- Ghana Hospital care -- Ghana
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/13603 , vital:27256
- Description: The retention of persons on an HIV programme has been a global challenge. The success of any strategy to optimize adherence to anti-retroviral therapy (ART) depends on the intensive and effective adherence counselling and strategies. It is important to research whether persons receiving anti-retroviral therapy in public hospitals in Ghana are receiving the needed service that would optimize their adherence to the anti-retroviral therapy. Therefore, this study explored and described the experiences of healthcare professionals providing care, support and guidance to persons on ART at public hospitals in Ghana, as well as the best-practice guideline that could contribute to facilitating the ART adherence of patients. This study also explored and described the experiences of persons living with Human Immunodeficiency Virus/Acquired Immunodeficiency Syndrome (HIV/AIDS) on ART, regarding their adherence to the therapy. The study was organized into three phases. In Phase One: a qualitative, exploratory, descriptive and contextual design was employed. The research population included healthcare professionals, providing services at the HIV clinic at the public hospitals in Ghana, namely the Korle-Bu Teaching Hospital; the 37 Military Hospital and the Ridge Hospital. The healthcare professionals comprised of doctors, nurses, pharmacists and trained counsellors employed in any of the three public hospitals. Persons receiving ART at any of the three public hospitals were also part of the research population. Semi-structured interviews were conducted with healthcare professionals and persons receiving ART. Data were collected from healthcare professionals in relation to their experiences regarding the provision of ART services, their understanding of evidence-based practice and best-practice guidelines, as well as data on the experiences of persons receiving ART in relation to their adherence to the therapy. The data were analysed using Creswell’s six steps of data analysis; and the coding of the data was done according to Tesch’s eight steps of coding. Trustworthiness was ensured by using Lincoln and Guba’s framework which comprised credibility, transferability, dependability, confirmability and authenticity. Ethical principles such as beneficence and non-maleficence, respect for human dignity, justice, veracity, privacy and confidentiality were considered in the study. In phase two, the literature was searched by using an integrative literature review approach and critically appraising the methodological quality of the guidelines in order to identify the best available evidence related to adherence to ART. In Phase Three, a best-practice guideline for facilitating adherence to ART was developed for public hospitals in Ghana based on the findings of the empirical research of Phase One and the integrative literature review in Phase Two. The guideline was submitted to an expert panel for review; and it was modified, according to the recommendations of the panel.
- Full Text:
- Date Issued: 2017
A bioinorganic study of some cobalt(II) Schiff base complexes of variously substituted hydroxybenzaldimines
- Authors: Shaibu, Rafiu Olarewaju
- Date: 2008
- Subjects: Cobalt Schiff bases Artemia Spectrum analysis Ligands -- Analysis Bioinorganic chemistry Antineoplastic agents Cancer -- Chemotherapy Ligands -- Toxicity
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4394 , http://hdl.handle.net/10962/d1006009
- Description: Syntheses of Schiff bases were carried out by reacting salicylaldyhde, ortho-vanillin, para-vanillin or vanillin with aniline, 1-aminonaphthalene, 4- and 3-aminopyridine, and also with 2- and 3-aminomethylpyridine. The various Schiff bases obtained from the condensation reaction were reacted with CoCl₂.6H₂0, triethylamine stripped CoCl₂.6H₂0 or Co(CH₃COO)₂ to form cobalt(Il) complexes of ratio 2:1. The complexes obtained from cobalt chloride designated as the "A series" are of the general formulae ML₂X₂.nH₂0 , (L = Schiff base, X = chlorine) while those obtained from cobalt acetate or triethylamine stripped cobalt chloride denoted as "B" and C" are of the general formulae ML₂. nH₂0. The few complexes that do not follow the general formulae highlighted above are: IA [M(HL)₃.Cl₂], (L = N-phenylsalicylaldimine), 4A = (MLCl₂), (L = N-phenylvanaldiminato), 7 A and 21 A (ML₂), (L = N-naphthyl-o-vanaldiminato, and N-methy-2-pyridylsalicylaldiminato respectively), 8A = MLCI, (L = N-naphthylvanaldiminato), 12A = M₂L₃Cl₂, (L = N-4-pyridylvanaldiminato), 15A (MLCI), (L = N-3-pyridyl-o-vanaldiminato). The ligands and their complexes were characterized using elemental analyses and cobalt analysis using ICP, FT-IR spectroscopy (mid and far-IR), NIR-UV/vis (diffuse reflectance), UV/vis in an aprotic and a protic solvents, while mass spectrometry, ¹HNMR and ¹³CNMR, was used to further characterized the ligands. The tautomeric nature of the Schiff bases were determined by examining the behaviour of Schiff bases and their complexes in a protic (e.g. MeOH) and non-protic (e.g. DMF) polar solvents. The effects of solvents on the electronic behaviour of the compounds were also examined. Using CDCl₃, the NMR technique was further used to confirm the structures of the Schiff bases. The tentative geometry of the complexes was determined using the spectra information obtained from the far infrared and the diffuse reflectance spectroscopy. With few exceptions, most of the "A" series are tetrahedral or distorted tetrahedral, while the "B + C" are octahedral or pseudooctahedral. A small number of complexes are assigned square-planar geometry owing to the characteristic spectral behaviour shown. In order to determine their biological activity, two biological assay methods (antimicrobial testing and brine shrimp lethality assay) were used. Using disc method, the bacteriostatic and fungicidal activities of the various Schiff bases and their respective complexes to Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa as well as Aspergillus niger, were measured and the average inhibition zones are tabulated and analysed. Both the Schiff bases and their complexes showed varying bacteriostatic and fungicidal activity against the bacteria and fungus tested. The inhibition activity is concentration dependent and potential antibiotic and fungicides are identified. To determine the toxicity of the ligands and their corresponding cobalt(II) complexes, brine shrimp lethality assay was used. The LD₅₀ of the tested compounds were calculated and the results obtained were tabulated for comparison.
- Full Text:
- Date Issued: 2008
- Authors: Shaibu, Rafiu Olarewaju
- Date: 2008
- Subjects: Cobalt Schiff bases Artemia Spectrum analysis Ligands -- Analysis Bioinorganic chemistry Antineoplastic agents Cancer -- Chemotherapy Ligands -- Toxicity
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4394 , http://hdl.handle.net/10962/d1006009
- Description: Syntheses of Schiff bases were carried out by reacting salicylaldyhde, ortho-vanillin, para-vanillin or vanillin with aniline, 1-aminonaphthalene, 4- and 3-aminopyridine, and also with 2- and 3-aminomethylpyridine. The various Schiff bases obtained from the condensation reaction were reacted with CoCl₂.6H₂0, triethylamine stripped CoCl₂.6H₂0 or Co(CH₃COO)₂ to form cobalt(Il) complexes of ratio 2:1. The complexes obtained from cobalt chloride designated as the "A series" are of the general formulae ML₂X₂.nH₂0 , (L = Schiff base, X = chlorine) while those obtained from cobalt acetate or triethylamine stripped cobalt chloride denoted as "B" and C" are of the general formulae ML₂. nH₂0. The few complexes that do not follow the general formulae highlighted above are: IA [M(HL)₃.Cl₂], (L = N-phenylsalicylaldimine), 4A = (MLCl₂), (L = N-phenylvanaldiminato), 7 A and 21 A (ML₂), (L = N-naphthyl-o-vanaldiminato, and N-methy-2-pyridylsalicylaldiminato respectively), 8A = MLCI, (L = N-naphthylvanaldiminato), 12A = M₂L₃Cl₂, (L = N-4-pyridylvanaldiminato), 15A (MLCI), (L = N-3-pyridyl-o-vanaldiminato). The ligands and their complexes were characterized using elemental analyses and cobalt analysis using ICP, FT-IR spectroscopy (mid and far-IR), NIR-UV/vis (diffuse reflectance), UV/vis in an aprotic and a protic solvents, while mass spectrometry, ¹HNMR and ¹³CNMR, was used to further characterized the ligands. The tautomeric nature of the Schiff bases were determined by examining the behaviour of Schiff bases and their complexes in a protic (e.g. MeOH) and non-protic (e.g. DMF) polar solvents. The effects of solvents on the electronic behaviour of the compounds were also examined. Using CDCl₃, the NMR technique was further used to confirm the structures of the Schiff bases. The tentative geometry of the complexes was determined using the spectra information obtained from the far infrared and the diffuse reflectance spectroscopy. With few exceptions, most of the "A" series are tetrahedral or distorted tetrahedral, while the "B + C" are octahedral or pseudooctahedral. A small number of complexes are assigned square-planar geometry owing to the characteristic spectral behaviour shown. In order to determine their biological activity, two biological assay methods (antimicrobial testing and brine shrimp lethality assay) were used. Using disc method, the bacteriostatic and fungicidal activities of the various Schiff bases and their respective complexes to Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa as well as Aspergillus niger, were measured and the average inhibition zones are tabulated and analysed. Both the Schiff bases and their complexes showed varying bacteriostatic and fungicidal activity against the bacteria and fungus tested. The inhibition activity is concentration dependent and potential antibiotic and fungicides are identified. To determine the toxicity of the ligands and their corresponding cobalt(II) complexes, brine shrimp lethality assay was used. The LD₅₀ of the tested compounds were calculated and the results obtained were tabulated for comparison.
- Full Text:
- Date Issued: 2008
A bring your own device information security behavioural model
- Authors: Musarurwa, Alfred
- Date: 2017
- Subjects: Data protection Computer security -- Management Privacy, Right of
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/8587 , vital:33166
- Description: The Bring Your Own Device (BYOD) phenomenon has become prevalent in the modern-day workplace, including the banking industry. Employees who own devices have become the unintended administrators of the organisation’s information as their mobile devices often carry information belonging to the organisation. The unintended administrator is not necessarily schooled or aware of the information security risks and challenges that are associated with the BYOD. This inadvertently shifts the management of organisational information security from the information technology (IT) administrator to the unintended administrator. This shift leaves the organisation at risk of information security breaches that can permeate the organisation, which result from the behaviour that the unintended administrator displays when operating the mobile device. This study introduces the BYOD Information Security Behavioural (BISB) model. The model constructs are a combination of individual and organisational traits of the unintended administrator. The purpose of this study is to mitigate the risks posed by the unintended administrator in organisations through the implementation this model. The risk that the unintended administrator poses in relation to the BYOD phenomenon results in chief information officers (CIOs) being unable to totally control these mobile devices. Traditional endpoint information security management tools and methods can no longer secure devices in the BYOD the way they can in the traditional network where they are confined to the organisation’s IT administrator. This results in the organisation’s information security becoming the responsibility of the unintended administrator. This study was conducted in the banking sector in Zimbabwe. It is noteworthy that the BYOD phenomenon has become prevalent in the banking sector among other organisational sectors like education, health or even government departments. Information security is also an important component of the banks as such and a choice was made to conduct the study in the banking industry. The design science research paradigm was followed in this study and included a survey of 270 bank employees in Zimbabwe, which received 170 complete responses. A literature review on both employee behaviour and organisational culture was conducted, followed by a case study of a commercial bank in Zimbabwe. The literature review culminated in traits that were then classified as individual traits and organisational traits. Six constructs –, knowledge, attitude, habit, environment, governance and training – were identified from the literature and combined to form the BYOD information security behavioural (BISB) model. Statistical calculations were conducted on the survey results which informed the reliability, validity and rigour of the model constructs. An expert review including industry experts was conducted to evaluate the BISB model. This study concludes by recommending that organisations in Zimbabwe should make use of the BISB model to mitigate the information security risks that are posed by the unintended administrator. While there are technical solutions for managing the information security risks that come with the BYOD, this study points out that without harnessing the individual and organisational traits that make up the BYOD information security behavioural model for the unintended administrator, technical solutions alone will not be effective.
- Full Text:
- Date Issued: 2017
- Authors: Musarurwa, Alfred
- Date: 2017
- Subjects: Data protection Computer security -- Management Privacy, Right of
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/8587 , vital:33166
- Description: The Bring Your Own Device (BYOD) phenomenon has become prevalent in the modern-day workplace, including the banking industry. Employees who own devices have become the unintended administrators of the organisation’s information as their mobile devices often carry information belonging to the organisation. The unintended administrator is not necessarily schooled or aware of the information security risks and challenges that are associated with the BYOD. This inadvertently shifts the management of organisational information security from the information technology (IT) administrator to the unintended administrator. This shift leaves the organisation at risk of information security breaches that can permeate the organisation, which result from the behaviour that the unintended administrator displays when operating the mobile device. This study introduces the BYOD Information Security Behavioural (BISB) model. The model constructs are a combination of individual and organisational traits of the unintended administrator. The purpose of this study is to mitigate the risks posed by the unintended administrator in organisations through the implementation this model. The risk that the unintended administrator poses in relation to the BYOD phenomenon results in chief information officers (CIOs) being unable to totally control these mobile devices. Traditional endpoint information security management tools and methods can no longer secure devices in the BYOD the way they can in the traditional network where they are confined to the organisation’s IT administrator. This results in the organisation’s information security becoming the responsibility of the unintended administrator. This study was conducted in the banking sector in Zimbabwe. It is noteworthy that the BYOD phenomenon has become prevalent in the banking sector among other organisational sectors like education, health or even government departments. Information security is also an important component of the banks as such and a choice was made to conduct the study in the banking industry. The design science research paradigm was followed in this study and included a survey of 270 bank employees in Zimbabwe, which received 170 complete responses. A literature review on both employee behaviour and organisational culture was conducted, followed by a case study of a commercial bank in Zimbabwe. The literature review culminated in traits that were then classified as individual traits and organisational traits. Six constructs –, knowledge, attitude, habit, environment, governance and training – were identified from the literature and combined to form the BYOD information security behavioural (BISB) model. Statistical calculations were conducted on the survey results which informed the reliability, validity and rigour of the model constructs. An expert review including industry experts was conducted to evaluate the BISB model. This study concludes by recommending that organisations in Zimbabwe should make use of the BISB model to mitigate the information security risks that are posed by the unintended administrator. While there are technical solutions for managing the information security risks that come with the BYOD, this study points out that without harnessing the individual and organisational traits that make up the BYOD information security behavioural model for the unintended administrator, technical solutions alone will not be effective.
- Full Text:
- Date Issued: 2017
A business model for medical subspecialty training in South Africa
- Dalmeyer, Johannes Paulus Franciscus
- Authors: Dalmeyer, Johannes Paulus Franciscus
- Date: 2015
- Subjects: Health care teams -- Training of -- South Africa , Medical care -- Needs assessment -- South Africa , Evidence-based medicine -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/3508 , vital:20437
- Description: The shortage of healthcare workers and doctors in the developing world compared to the developed world is a problem, and will continue to be so, due to the continual migration of qualified professionals and the inability of the state to remedy these shortfalls. A shortage of healthcare workers and specialist doctors will seriously hamper the Government’s National Health Insurance (NHI) plan, as well as the sustainability of the private health care sector. In addition, the duration of medical training in South Africa is exceptionally long. The three major hospital groups and other private corporates have over the last number of years taken limited initiative to fund education projects in conjunction with the academic institutions. However, these projects have been poorly focused and have been managed in an unstructured and detached manner. There is a desire from the private sector to get involved in these projects on a much larger scale through more formalised structures. Given this background, the primary objective of this research is to develop a business model for medical subspecialty training to complement the current academic subspecialty training in South Africa. A trial model for training subspecialists in reproductive medicine was developed as a first attempt to address the threatening shortages and training duration. This trial programme is the basis of this research. A two-phased process was used in collecting data. In Phase 1 data was collected from stakeholder groups. The results of this survey assisted in generating variables to include in the measuring instrument for the survey in Phase 2. In Phase 2 the perceptions and expectations of sub-specialists (reproductive subspecialists and cardiologists) regarding sub-specialty training was collected. The results of the demographic variables confirm the aging profile of subspecialist and the need to ensure succession. The results further showed that cardiologists and reproductive subspecialist expectations of the training of subspecialists are very similar except for their expectations on the training duration. Reproductive subspecialist respondents agreed more than cardiology subspecialist respondents that the training duration is too long. The biggest gap between perceptions and expectations is also with the factor training. The results showed that the expectations of subspecialists are not met for training. From these results a business model for the training of medical subspecialists is proposed. This proposed business model can play a complementary role to the existing state controlled system and form the bases of Public Private Partnerships (PPP) in medical training. This proposed business model will fit a developing country were the focus is on primary healthcare, with financial and capacity constraints. The proposed model would require role players to bring about change to accommodate a larger scale Public Private Partnership (PPP) to ensure the implementation of the model. The proposed decentralised business model for training subspecialists would allow the trainee subspecialist to practise as a specialist thus maintaining an acceptable income, and enable an expedited completion and lead to a wider dissemination of medical expertise that can be delivered in a wider national foot print. It further will provide for a structured Public Private Partnership.
- Full Text:
- Date Issued: 2015
- Authors: Dalmeyer, Johannes Paulus Franciscus
- Date: 2015
- Subjects: Health care teams -- Training of -- South Africa , Medical care -- Needs assessment -- South Africa , Evidence-based medicine -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/3508 , vital:20437
- Description: The shortage of healthcare workers and doctors in the developing world compared to the developed world is a problem, and will continue to be so, due to the continual migration of qualified professionals and the inability of the state to remedy these shortfalls. A shortage of healthcare workers and specialist doctors will seriously hamper the Government’s National Health Insurance (NHI) plan, as well as the sustainability of the private health care sector. In addition, the duration of medical training in South Africa is exceptionally long. The three major hospital groups and other private corporates have over the last number of years taken limited initiative to fund education projects in conjunction with the academic institutions. However, these projects have been poorly focused and have been managed in an unstructured and detached manner. There is a desire from the private sector to get involved in these projects on a much larger scale through more formalised structures. Given this background, the primary objective of this research is to develop a business model for medical subspecialty training to complement the current academic subspecialty training in South Africa. A trial model for training subspecialists in reproductive medicine was developed as a first attempt to address the threatening shortages and training duration. This trial programme is the basis of this research. A two-phased process was used in collecting data. In Phase 1 data was collected from stakeholder groups. The results of this survey assisted in generating variables to include in the measuring instrument for the survey in Phase 2. In Phase 2 the perceptions and expectations of sub-specialists (reproductive subspecialists and cardiologists) regarding sub-specialty training was collected. The results of the demographic variables confirm the aging profile of subspecialist and the need to ensure succession. The results further showed that cardiologists and reproductive subspecialist expectations of the training of subspecialists are very similar except for their expectations on the training duration. Reproductive subspecialist respondents agreed more than cardiology subspecialist respondents that the training duration is too long. The biggest gap between perceptions and expectations is also with the factor training. The results showed that the expectations of subspecialists are not met for training. From these results a business model for the training of medical subspecialists is proposed. This proposed business model can play a complementary role to the existing state controlled system and form the bases of Public Private Partnerships (PPP) in medical training. This proposed business model will fit a developing country were the focus is on primary healthcare, with financial and capacity constraints. The proposed model would require role players to bring about change to accommodate a larger scale Public Private Partnership (PPP) to ensure the implementation of the model. The proposed decentralised business model for training subspecialists would allow the trainee subspecialist to practise as a specialist thus maintaining an acceptable income, and enable an expedited completion and lead to a wider dissemination of medical expertise that can be delivered in a wider national foot print. It further will provide for a structured Public Private Partnership.
- Full Text:
- Date Issued: 2015
A case for institutional investigations in economic research methods with reference to South Africa's agricultural sector
- Authors: Mbatha, Cyril
- Date: 2008
- Subjects: Economic development -- South Africa Economic development -- Research -- Methodology Agriculture -- South Africa Agriculture -- Economic aspects -- South Africa Agricultural productivity -- South Africa Agriculture -- Research -- South Africa South Africa -- Economic conditions
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:972 , http://hdl.handle.net/10962/d1002706
- Description: Economic development remains elusive for many world economies, but especially those of African countries. The current global inequalities in terms of GNP per capita and human living standards between developed and developing nations have ensured that the challenges of food insecurities are only some of the many negative experiences of underdevelopment in the African continent. Hence, delivery pressures are increasing on policy makers and researchers to provide tangible and timely economic solutions to the resilient state of underdevelopment. In the policy fights against the challenges posed by a lack of development in South Africa, the agricultural sector has in the past and continues in the present to play a central role. Such is the case because the majority of citizens rely on agricultural production activities for their livelihoods. For instance, even though the sector only contributed four percent towards the national Gross Domestic Product in 2006, in the Eastern Cape Province, more than seventy percent of the total population resided in rural areas. Moreover, in 2004 more than sixty percent of the national formal and informal employment levels were found in the sector. These economic indicators do not only reinforce the assertions that high levels of geographical and sectoral inequalities exist in the country’s economy, but they also illustrate the importance of the agricultural sector in public policy attempts, which are aimed at achieving food security alongside long-term developmental objectives. Some economists, especially the proponents of institutionalism, have argued that most of the recommendations to public policy interventions from mainstream economic research endeavours are not adequately helpful. The recommendations generally lack well considered and socially effective ideas, mainly because there remains some level of ignorance about the impacts that institutions have on economic and social systems. Some argue that this ignorance is reflected in (flawed) hedonistic and rationalist assumptions made about economic actors and in the methodological thinking of many research designs and economic analyses. The misuse of formal tools and statistical methods, for example, are some of the important factors, which have led to failures of the discipline of economics to provide effective policy solutions to problems of underdevelopment and poverty, especially in poor country environments. The thesis, having taken account of the majority of criticisms levelled against the classical and new-classical economic schools of thought, argues that the discipline as a whole lacks a paradigmatic integration of institutional and new-classical economic perspectives to offer appropriate guidelines for a methodology aimed at achieving socially responsive research outputs. The lack of this integration has resulted in a skewed selection of methods by economists, which are employed in research without a supportive and in-depth understanding of institutional and social factors. To support the thesis, a more effective and integrated framework for economic research is developed and presented with case study illustrations in a cumulative manner. The 20th century history of agricultural policies in South Africa, the agricultural and institutional case studies from the Eastern Cape Province alongside reviews of other agricultural studies are all used in presenting a case for rigorous institutional investigations in general economic research. These are also used in developing the proposed integrated framework, which aims to give guidance in developing research methods, which are more socially responsive. Having shown the usefulness of the proposed research framework, the thesis recommends that public policy interventions (at national and local levels) should aim to eliminate all types of institutions which have high associated transactional costs. The interventions should also encourage the emergence and growth of the types of institutions, which present the lowest costs to initiatives of economic development. In the primary case studies from the Eastern Cape Province, the insecurity of land tenure and the various local initiatives of business ventures are highlighted as two examples of the types of institutions, which respectively present high and low transactional costs to local initiatives of agricultural and economic development.
- Full Text:
- Date Issued: 2008
- Authors: Mbatha, Cyril
- Date: 2008
- Subjects: Economic development -- South Africa Economic development -- Research -- Methodology Agriculture -- South Africa Agriculture -- Economic aspects -- South Africa Agricultural productivity -- South Africa Agriculture -- Research -- South Africa South Africa -- Economic conditions
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:972 , http://hdl.handle.net/10962/d1002706
- Description: Economic development remains elusive for many world economies, but especially those of African countries. The current global inequalities in terms of GNP per capita and human living standards between developed and developing nations have ensured that the challenges of food insecurities are only some of the many negative experiences of underdevelopment in the African continent. Hence, delivery pressures are increasing on policy makers and researchers to provide tangible and timely economic solutions to the resilient state of underdevelopment. In the policy fights against the challenges posed by a lack of development in South Africa, the agricultural sector has in the past and continues in the present to play a central role. Such is the case because the majority of citizens rely on agricultural production activities for their livelihoods. For instance, even though the sector only contributed four percent towards the national Gross Domestic Product in 2006, in the Eastern Cape Province, more than seventy percent of the total population resided in rural areas. Moreover, in 2004 more than sixty percent of the national formal and informal employment levels were found in the sector. These economic indicators do not only reinforce the assertions that high levels of geographical and sectoral inequalities exist in the country’s economy, but they also illustrate the importance of the agricultural sector in public policy attempts, which are aimed at achieving food security alongside long-term developmental objectives. Some economists, especially the proponents of institutionalism, have argued that most of the recommendations to public policy interventions from mainstream economic research endeavours are not adequately helpful. The recommendations generally lack well considered and socially effective ideas, mainly because there remains some level of ignorance about the impacts that institutions have on economic and social systems. Some argue that this ignorance is reflected in (flawed) hedonistic and rationalist assumptions made about economic actors and in the methodological thinking of many research designs and economic analyses. The misuse of formal tools and statistical methods, for example, are some of the important factors, which have led to failures of the discipline of economics to provide effective policy solutions to problems of underdevelopment and poverty, especially in poor country environments. The thesis, having taken account of the majority of criticisms levelled against the classical and new-classical economic schools of thought, argues that the discipline as a whole lacks a paradigmatic integration of institutional and new-classical economic perspectives to offer appropriate guidelines for a methodology aimed at achieving socially responsive research outputs. The lack of this integration has resulted in a skewed selection of methods by economists, which are employed in research without a supportive and in-depth understanding of institutional and social factors. To support the thesis, a more effective and integrated framework for economic research is developed and presented with case study illustrations in a cumulative manner. The 20th century history of agricultural policies in South Africa, the agricultural and institutional case studies from the Eastern Cape Province alongside reviews of other agricultural studies are all used in presenting a case for rigorous institutional investigations in general economic research. These are also used in developing the proposed integrated framework, which aims to give guidance in developing research methods, which are more socially responsive. Having shown the usefulness of the proposed research framework, the thesis recommends that public policy interventions (at national and local levels) should aim to eliminate all types of institutions which have high associated transactional costs. The interventions should also encourage the emergence and growth of the types of institutions, which present the lowest costs to initiatives of economic development. In the primary case studies from the Eastern Cape Province, the insecurity of land tenure and the various local initiatives of business ventures are highlighted as two examples of the types of institutions, which respectively present high and low transactional costs to local initiatives of agricultural and economic development.
- Full Text:
- Date Issued: 2008
A case study : exploring a DVD driven approach for teaching and learning mathematics, at secondary school level, with a framework of blended learning
- Authors: Padayachee, Pragashni
- Date: 2010
- Subjects: Matehmatics -- Study and Teaching (Secondary) -- Audio-visual aids , Matehmatics -- Study and Teaching (Secondary) -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10504 , http://hdl.handle.net/10948/1384 , Matehmatics -- Study and Teaching (Secondary) -- Audio-visual aids , Matehmatics -- Study and Teaching (Secondary) -- South Africa -- Port Elizabeth
- Description: Post-apartheid South Africa is witnessing an education crisis of significant proportions. The new outcomes-based education system has failed to deliver and universities are suffering the consequences of under-preparation of learners for tertiary studies especially in mathematics. The educator corps is lacking and it has become common practice for universities to deploy augmented programmes in mathematics for secondary school learners in the surrounding areas. This thesis describes a particular approach of blended learning, devised for the Incubator School Project (ISP), an initiative of the Nelson Mandela Metropolitan University (NMMU) in the Eastern Cape of South Africa. The defining feature of this blended approach is that it incorporates DVD technology, which offers an affordable and accessible option for the particular group of learners and the schools they attend. The thesis poses the research question: How did the use of the DVD approach within a blended learning environment support the learning of mathematics? This case study explores the particular blended approach and reports six fold on the approach – qualitatively based firstly on a questionnaire completed by learners and secondly on interviews of learners, thirdly on the facilitators reports, fourthly quantitatively on learner performance before and after the intervention. Fifthly six schools are used as a case study where the mathematics performance of the learners who participated in the ISP is compared to those who did not participate in the ISP. Finally the scope of blending of this model is evaluated by means of a radar chart, adapted from an existing radar measure. This research revealed that using the DVD approach within a blended learning environment did lead to an improvement in learners perceptions about mathematics, an improvement in the manner in which they learned mathematics, an extension in their mathematics knowledge and provided learners with a supportive environment in which to learn mathematics. The elements which supported learning in this approach are presented. The findings of the study suggest that this approach impacted favourably on the mathematics learning and enhanced the mathematics learning and performance of these learners. Recommendations are offered for practice, teachers and schools and for further research possibilities.
- Full Text:
- Date Issued: 2010
- Authors: Padayachee, Pragashni
- Date: 2010
- Subjects: Matehmatics -- Study and Teaching (Secondary) -- Audio-visual aids , Matehmatics -- Study and Teaching (Secondary) -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10504 , http://hdl.handle.net/10948/1384 , Matehmatics -- Study and Teaching (Secondary) -- Audio-visual aids , Matehmatics -- Study and Teaching (Secondary) -- South Africa -- Port Elizabeth
- Description: Post-apartheid South Africa is witnessing an education crisis of significant proportions. The new outcomes-based education system has failed to deliver and universities are suffering the consequences of under-preparation of learners for tertiary studies especially in mathematics. The educator corps is lacking and it has become common practice for universities to deploy augmented programmes in mathematics for secondary school learners in the surrounding areas. This thesis describes a particular approach of blended learning, devised for the Incubator School Project (ISP), an initiative of the Nelson Mandela Metropolitan University (NMMU) in the Eastern Cape of South Africa. The defining feature of this blended approach is that it incorporates DVD technology, which offers an affordable and accessible option for the particular group of learners and the schools they attend. The thesis poses the research question: How did the use of the DVD approach within a blended learning environment support the learning of mathematics? This case study explores the particular blended approach and reports six fold on the approach – qualitatively based firstly on a questionnaire completed by learners and secondly on interviews of learners, thirdly on the facilitators reports, fourthly quantitatively on learner performance before and after the intervention. Fifthly six schools are used as a case study where the mathematics performance of the learners who participated in the ISP is compared to those who did not participate in the ISP. Finally the scope of blending of this model is evaluated by means of a radar chart, adapted from an existing radar measure. This research revealed that using the DVD approach within a blended learning environment did lead to an improvement in learners perceptions about mathematics, an improvement in the manner in which they learned mathematics, an extension in their mathematics knowledge and provided learners with a supportive environment in which to learn mathematics. The elements which supported learning in this approach are presented. The findings of the study suggest that this approach impacted favourably on the mathematics learning and enhanced the mathematics learning and performance of these learners. Recommendations are offered for practice, teachers and schools and for further research possibilities.
- Full Text:
- Date Issued: 2010
A case study of a pre-service mathematics education course to grow and develop proficient teaching in mathematics in the intermediate phase
- Authors: Lee, Amanda Jane
- Date: 2014
- Subjects: Mathematics -- Study and teaching -- South Africa , Mathematics teachers -- Training of -- South Africa , Mathematics -- Study and teaching (Elementary) -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2004 , http://hdl.handle.net/10962/d1015664
- Description: This research study investigated the ways in which a mathematics module, informed by an enactivist philosophy, enabled pre-service teachers to unpack the reality of their teaching practice in terms of proficient teaching. Given the generally poor mathematics results in South Africa it is not enough for teachers to be merely proficient in Mathematics. They also need to be in a position to explain important mathematical concepts to children in a manner that will encourage and develop an understanding of the basic mathematical concepts. It was my intention with this study to determine whether a mathematics education module, that embraced the underlying themes of enactivism as part of its teaching pedagogy, could have the potential to develop and increase the skills of pre-service teachers’ teaching for proficiency in Mathematics. The mathematics module was underpinned by five themes of enactivism namely: autonomy, embodiment, emergence, sense-making and experience and was designed to supplement the pre-service teachers’ basic skills in Mathematics in the Intermediate Phase. This mathematics module was offered to fourth year pre-service teachers completing a B.Ed. in the Foundation Phase at a private institute specialising in the training of teachers. The theoretical framework was informed by enactivism and how the themes of enactivism could be used as a vehicle to develop teaching proficiency. The study was qualitative in nature and situated within an interpretivist paradigm. The specific perspectives of interpretivism that were used were hermeneutics, phenomenology and reflexivity. The research design was a case study that contained elements of action research and encompassed three phases of data collection. The first phase focused on the pre-service teachers’ approach to teaching Mathematics and what this brought forth in terms of the reality of their teaching practice and the problems they encountered. The second phase undertook to determine what growth and development of teaching proficiency in Mathematics had emerged over the research period. The final phase was undertaken after the pre-service teachers had graduated and were employed as full time teachers in the Intermediate Phase. The analytical framework and lens through which the data was analysed was that of Kilpatrick, Swafford and Findell’s (2001) strands of mathematical proficiency. The argument that I present is that the themes of enactivism did contribute to the growth of the pre-service teachers’ teaching for mathematical proficiency. The themes of embodiment and experience were major contributions in revealing that this was a reality for the pre-service teachers from a practical perspective and was what they would be able to take away with them. However the theme of emergence stood out as the principle that generated the most awareness and growth and which, in turn, affected the participants’ autonomy.
- Full Text:
- Date Issued: 2014
- Authors: Lee, Amanda Jane
- Date: 2014
- Subjects: Mathematics -- Study and teaching -- South Africa , Mathematics teachers -- Training of -- South Africa , Mathematics -- Study and teaching (Elementary) -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2004 , http://hdl.handle.net/10962/d1015664
- Description: This research study investigated the ways in which a mathematics module, informed by an enactivist philosophy, enabled pre-service teachers to unpack the reality of their teaching practice in terms of proficient teaching. Given the generally poor mathematics results in South Africa it is not enough for teachers to be merely proficient in Mathematics. They also need to be in a position to explain important mathematical concepts to children in a manner that will encourage and develop an understanding of the basic mathematical concepts. It was my intention with this study to determine whether a mathematics education module, that embraced the underlying themes of enactivism as part of its teaching pedagogy, could have the potential to develop and increase the skills of pre-service teachers’ teaching for proficiency in Mathematics. The mathematics module was underpinned by five themes of enactivism namely: autonomy, embodiment, emergence, sense-making and experience and was designed to supplement the pre-service teachers’ basic skills in Mathematics in the Intermediate Phase. This mathematics module was offered to fourth year pre-service teachers completing a B.Ed. in the Foundation Phase at a private institute specialising in the training of teachers. The theoretical framework was informed by enactivism and how the themes of enactivism could be used as a vehicle to develop teaching proficiency. The study was qualitative in nature and situated within an interpretivist paradigm. The specific perspectives of interpretivism that were used were hermeneutics, phenomenology and reflexivity. The research design was a case study that contained elements of action research and encompassed three phases of data collection. The first phase focused on the pre-service teachers’ approach to teaching Mathematics and what this brought forth in terms of the reality of their teaching practice and the problems they encountered. The second phase undertook to determine what growth and development of teaching proficiency in Mathematics had emerged over the research period. The final phase was undertaken after the pre-service teachers had graduated and were employed as full time teachers in the Intermediate Phase. The analytical framework and lens through which the data was analysed was that of Kilpatrick, Swafford and Findell’s (2001) strands of mathematical proficiency. The argument that I present is that the themes of enactivism did contribute to the growth of the pre-service teachers’ teaching for mathematical proficiency. The themes of embodiment and experience were major contributions in revealing that this was a reality for the pre-service teachers from a practical perspective and was what they would be able to take away with them. However the theme of emergence stood out as the principle that generated the most awareness and growth and which, in turn, affected the participants’ autonomy.
- Full Text:
- Date Issued: 2014
A Case study of students' first additional language reading and response in the faculty of education at the University of Fort Hare: Eastern Cape
- Authors: Linake, Manthekeleng A
- Date: 2015
- Subjects: Language and education Language and languages -- Study and teaching -- South Africa --Eastern Cape English language -- Study and teaching -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Degree
- Identifier: http://hdl.handle.net/10353/5851 , vital:29402
- Description: Although reading ability alone cannot guarantee academic success, it is highly likely that a lack of reading can function as a key barrier to academic achievement. There are many other factors that are part of the causality. Of these, socio-economic status, teaching methods, parental involvement and lack of exposure to LoLT are probably the most important. Classroom teaching for reading instruction needs to be considered as the critical factor in preventing reading problems and must be the central focus for change. As such, teachers’ acquisition of the teaching skills necessary to bring about the development of literate language competency are critical especially in South Africa where many assumptions have been largely unquestioned about how to teach reading and writing, which languages to use and what counts as high quality practice in classrooms (Banda, 2000). The main aim of the study was to investigate principally reading with the use of English first additional language (FAL) in South African Universities. The objectives included enabling students to successfully learn reading in order to promote their’ reading to such a level that they can continue reading to learn and not learning to read. The researcher was particularly interested in exploring broader trends in reading strategies, instructions and training for students with the intention of contributing possible strategies to address the training of students for their role as literacy instructors in English as well as in multilingual education in South Africa. Methodologically, the study is premised within the interpretivist paradigm based on a qualitative research method. It is a case study design. It is a longitudinal study that covered a total of four years, the duration for a B Ed degree. The population comprises all forth year English teaching methods class and ten lecturers in the programme. The data collection tools included documents, participant observation, journal entry, assessments and focus groups. Interviews were granted to a purposively selected number of students (9) based on their academic performance over the years. There were three weak, three medium and three strong students that were interviewed. A total of 10 teachers were randomly selected from the Faculty to get their input about students’ reading. The ages of the respondents ranged from 18-60. The study concluded that students prefer to be taught in English although most see it as a barrier to learning. The findings showed that language learning can be easier if it is considered as social practice with academic purpose. The researcher recommends that there is need for a reduction of administrative duties from the lecturers to create more time for consultation. She or he also see a need for tutorials which can help to expose learners even more to interaction in EFAL.
- Full Text:
- Date Issued: 2015
- Authors: Linake, Manthekeleng A
- Date: 2015
- Subjects: Language and education Language and languages -- Study and teaching -- South Africa --Eastern Cape English language -- Study and teaching -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , Degree
- Identifier: http://hdl.handle.net/10353/5851 , vital:29402
- Description: Although reading ability alone cannot guarantee academic success, it is highly likely that a lack of reading can function as a key barrier to academic achievement. There are many other factors that are part of the causality. Of these, socio-economic status, teaching methods, parental involvement and lack of exposure to LoLT are probably the most important. Classroom teaching for reading instruction needs to be considered as the critical factor in preventing reading problems and must be the central focus for change. As such, teachers’ acquisition of the teaching skills necessary to bring about the development of literate language competency are critical especially in South Africa where many assumptions have been largely unquestioned about how to teach reading and writing, which languages to use and what counts as high quality practice in classrooms (Banda, 2000). The main aim of the study was to investigate principally reading with the use of English first additional language (FAL) in South African Universities. The objectives included enabling students to successfully learn reading in order to promote their’ reading to such a level that they can continue reading to learn and not learning to read. The researcher was particularly interested in exploring broader trends in reading strategies, instructions and training for students with the intention of contributing possible strategies to address the training of students for their role as literacy instructors in English as well as in multilingual education in South Africa. Methodologically, the study is premised within the interpretivist paradigm based on a qualitative research method. It is a case study design. It is a longitudinal study that covered a total of four years, the duration for a B Ed degree. The population comprises all forth year English teaching methods class and ten lecturers in the programme. The data collection tools included documents, participant observation, journal entry, assessments and focus groups. Interviews were granted to a purposively selected number of students (9) based on their academic performance over the years. There were three weak, three medium and three strong students that were interviewed. A total of 10 teachers were randomly selected from the Faculty to get their input about students’ reading. The ages of the respondents ranged from 18-60. The study concluded that students prefer to be taught in English although most see it as a barrier to learning. The findings showed that language learning can be easier if it is considered as social practice with academic purpose. The researcher recommends that there is need for a reduction of administrative duties from the lecturers to create more time for consultation. She or he also see a need for tutorials which can help to expose learners even more to interaction in EFAL.
- Full Text:
- Date Issued: 2015
A century of IsiXhosa written poetry and the ideological contest in South Africa
- Authors: Mona, Godfrey Vulindlela
- Date: 2015
- Subjects: Xhosa poetry -- History and criticism , Protest poetry, Xhosa , Ideology and literature
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3651 , http://hdl.handle.net/10962/d1017892
- Description: The central argument of this inter-disciplinary study is that IsiXhosa written poetry of 1912 – 2012 is a terrain of the struggle between the contending dominant ideologies of Segregation, Apartheid and Charterism (post-Apartheid); and the subordinate/ subaltern ideologies of Africanism, Charterism (pre-democracy), Pan- Africanism, Black Consciousness Movement and other post Apartheid ideologies. The study highlights the mutual relationship between the text and the context by focussing on the ideological contest which manifests itself in both form and structure (i.e. aesthetic ideology) and the content (i.e. authorial ideology) of the poetry of different epochs between 1912 and 2012. The study is located within the framework of Antonio Gramsci’s theory of cultural construction. Gramsci postulates that ideology and culture play a significant role in the process of asserting hegemony. Important concepts that constitute Gramsci’s theory of praxis are: ideology, culture, hegemony, organic intellectuals and both ideological and repressive state apparatuses. The first chapter presents the problem, the objectives, the methodology, and the scope of the study. The second chapter presents Gramsci’s theory of cultural construction and the work of scholars who developed his theory further. The tool that is employed for analysis and interpretation of textual significations of IsiXhosa written poetry is the revolutionary aesthetics, which is proposed by Udenta. The third chapter analyses and interprets literature of the epoch of 1912-1934 and exposes the contest between Segregation and Africanism ideologies. The fourth chapter contextualises and analyses the literature of 1934 – 1948, the second phase of contestation between Segregation and Africanism. The fifth chapter deals with literature of the first and second halves of the Apartheid epoch (1948 - 1973). The Apartheid ideology contested with the Africanist ideology which transformed into the Charterism ideology in 1955. In 1960 Pan-Africanism ideology and in 1969 Black Consciousness Movement ideologies entered the contest. The sixth chapter examines literature of the period 1973 – 1994 which is the second phase of the Apartheid epoch that ends with the “glasnost” period of 1990 - 1994. The seventh chapter studies literature of the democracy period of 1994 – 2012. The eighth chapter is the summary and general conclusion. The illumination of the nexus between culture and ideology during the past century (1912 - 2012) will provide insights that will assist us in addressing the challenges we face during the democracy period, and in the development on Arts and Culture in general, and literature in particular
- Full Text:
- Date Issued: 2015
- Authors: Mona, Godfrey Vulindlela
- Date: 2015
- Subjects: Xhosa poetry -- History and criticism , Protest poetry, Xhosa , Ideology and literature
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3651 , http://hdl.handle.net/10962/d1017892
- Description: The central argument of this inter-disciplinary study is that IsiXhosa written poetry of 1912 – 2012 is a terrain of the struggle between the contending dominant ideologies of Segregation, Apartheid and Charterism (post-Apartheid); and the subordinate/ subaltern ideologies of Africanism, Charterism (pre-democracy), Pan- Africanism, Black Consciousness Movement and other post Apartheid ideologies. The study highlights the mutual relationship between the text and the context by focussing on the ideological contest which manifests itself in both form and structure (i.e. aesthetic ideology) and the content (i.e. authorial ideology) of the poetry of different epochs between 1912 and 2012. The study is located within the framework of Antonio Gramsci’s theory of cultural construction. Gramsci postulates that ideology and culture play a significant role in the process of asserting hegemony. Important concepts that constitute Gramsci’s theory of praxis are: ideology, culture, hegemony, organic intellectuals and both ideological and repressive state apparatuses. The first chapter presents the problem, the objectives, the methodology, and the scope of the study. The second chapter presents Gramsci’s theory of cultural construction and the work of scholars who developed his theory further. The tool that is employed for analysis and interpretation of textual significations of IsiXhosa written poetry is the revolutionary aesthetics, which is proposed by Udenta. The third chapter analyses and interprets literature of the epoch of 1912-1934 and exposes the contest between Segregation and Africanism ideologies. The fourth chapter contextualises and analyses the literature of 1934 – 1948, the second phase of contestation between Segregation and Africanism. The fifth chapter deals with literature of the first and second halves of the Apartheid epoch (1948 - 1973). The Apartheid ideology contested with the Africanist ideology which transformed into the Charterism ideology in 1955. In 1960 Pan-Africanism ideology and in 1969 Black Consciousness Movement ideologies entered the contest. The sixth chapter examines literature of the period 1973 – 1994 which is the second phase of the Apartheid epoch that ends with the “glasnost” period of 1990 - 1994. The seventh chapter studies literature of the democracy period of 1994 – 2012. The eighth chapter is the summary and general conclusion. The illumination of the nexus between culture and ideology during the past century (1912 - 2012) will provide insights that will assist us in addressing the challenges we face during the democracy period, and in the development on Arts and Culture in general, and literature in particular
- Full Text:
- Date Issued: 2015
A change framework for introducing performance management in higher education: a case study
- Authors: Ndung’u, Agnes
- Date: 2019
- Subjects: Performance -- Management , Education, Higher -- Evaluation Organizational change Organizational effectiveness
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/41796 , vital:36590
- Description: The South African Higher Education Act 101 of 1997 provides a legal framework for the management of higher education institutions based on quality assurance and accountability. As such, the Act mandates the introduction of performance management. Performance management is one of the most challenging areas of responsibility in the field of human resources management. The literature, as discussed in this study, reveals that performance management is a complex phenomenon and that the implementation of a performance management system is, for a variety of reasons, not always successful. Failure is mostly attributed to not taking a planned, scientific and collaborative approach to implementation, resulting to lack of buy-in from significant stakeholders. Specifically, the introduction of performance management in the higher education sector presents a unique challenge, as the process requires that stakeholders and especially academics, to shift from a traditional culture of collegiality to one in which accountability is measured by formal criteria. While existing literature does address the management of change in organisations, there is a paucity of literature on managing change with regards to performance management and specifically in the context of higher education. The purpose of this study was to develop and present a comprehensive change framework for introducing performance management in higher education. In order to provide a theoretical basis for the research, existing literature on performance management, change management as well as the higher education context was reviewed, to identify potential barriers to the implementation of performance management. A case study analysis was conducted on the implementation of performance management at a comprehensive university, which included presenting a historical timeline of implementation based on documented evidence, and reporting on open-ended interviews and focus groups conducted with significant stakeholders. The stakeholders included management, Human Resources (HR), academic staff, administrative and support staff, as well as trade union representatives. Key lessons were drawn and fused to develop a change framework for the introduction of performance management in higher education. The framework encapsulates key themes extracted from the literature and empirical study, with regard to readiness for change, planning, implementing and sustaining change, with cognisance of the unique context. The research revealed critical aspects for the successful implementation of performance management communication with and the involvement of stakeholders, the commitment of senior management, training, embedding the change in the organisational culture, and constantly evaluating the progress as a feedback loop for making improvements. The study demonstrates that planning the change process helps to improve the effectiveness of implementing performance management. A process framework for developing and introducing performance management in the context of higher education is created with a focus on how to create ownership through communication and involvement. The proposed framework serves as a valuable resource for researchers and practitioners, especially those involved in higher education.
- Full Text:
- Date Issued: 2019
- Authors: Ndung’u, Agnes
- Date: 2019
- Subjects: Performance -- Management , Education, Higher -- Evaluation Organizational change Organizational effectiveness
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/41796 , vital:36590
- Description: The South African Higher Education Act 101 of 1997 provides a legal framework for the management of higher education institutions based on quality assurance and accountability. As such, the Act mandates the introduction of performance management. Performance management is one of the most challenging areas of responsibility in the field of human resources management. The literature, as discussed in this study, reveals that performance management is a complex phenomenon and that the implementation of a performance management system is, for a variety of reasons, not always successful. Failure is mostly attributed to not taking a planned, scientific and collaborative approach to implementation, resulting to lack of buy-in from significant stakeholders. Specifically, the introduction of performance management in the higher education sector presents a unique challenge, as the process requires that stakeholders and especially academics, to shift from a traditional culture of collegiality to one in which accountability is measured by formal criteria. While existing literature does address the management of change in organisations, there is a paucity of literature on managing change with regards to performance management and specifically in the context of higher education. The purpose of this study was to develop and present a comprehensive change framework for introducing performance management in higher education. In order to provide a theoretical basis for the research, existing literature on performance management, change management as well as the higher education context was reviewed, to identify potential barriers to the implementation of performance management. A case study analysis was conducted on the implementation of performance management at a comprehensive university, which included presenting a historical timeline of implementation based on documented evidence, and reporting on open-ended interviews and focus groups conducted with significant stakeholders. The stakeholders included management, Human Resources (HR), academic staff, administrative and support staff, as well as trade union representatives. Key lessons were drawn and fused to develop a change framework for the introduction of performance management in higher education. The framework encapsulates key themes extracted from the literature and empirical study, with regard to readiness for change, planning, implementing and sustaining change, with cognisance of the unique context. The research revealed critical aspects for the successful implementation of performance management communication with and the involvement of stakeholders, the commitment of senior management, training, embedding the change in the organisational culture, and constantly evaluating the progress as a feedback loop for making improvements. The study demonstrates that planning the change process helps to improve the effectiveness of implementing performance management. A process framework for developing and introducing performance management in the context of higher education is created with a focus on how to create ownership through communication and involvement. The proposed framework serves as a valuable resource for researchers and practitioners, especially those involved in higher education.
- Full Text:
- Date Issued: 2019
A characterization of landslide occurrence in the Kigezi Highlands of South Western Uganda
- Authors: Nseka, Denis
- Date: 2018
- Subjects: Landslides -- Uganda , Land degradation -- Uganda Earth movements
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/33791 , vital:33029
- Description: The frequency and magnitude of landslide occurrence in the Kigezi highlands of South Western Uganda has increased, but the key underpinnings of the occurrences are yet to be understood. The overall aim of this study was to characterize the parameters underpinning landslide occurrence in the Kigezi highlands. This information is important for predicting or identifying actual and potential landslide sites. This should inform policy, particularly in terms of developing early warning systems to landslide hazards in these highlands. The present study analysed the area’s topography, soil properties as well as land use and cover changes underpinning the spatialtemporal distribution of landslide occurrence in the region. The present study focussed on selected topographic parameters including slope gradient, profile curvature, Topographic Wetness Index (TWI), Stream Power Index (SPI), and Topographic Position Index (TPI). These factors were parameterized in the field and GIS environment using a 10 m Digital Elevation Model. Sixty five landslide features were surveyed and mapped. Soil properties were characterised in relation to slope position. Onsite soil property analysis was conducted within the landslide scars, auger holes and full profile representative sites. Furthermore, soil infiltration and strength tests, as well as clay mineralogy analyses were also conducted. An analysis of the spatial-temporal land use and cover changes was undertaken using satellite imagery spanning the period between 1985 and 2015. Landslides were noted to concentrate along topographic hollows in the landscape. The occurrence is dominant where slope gradient is between 25˚ and 35˚, profile curvature between 0.1 and 5, TWI between 8 and 18, SPI >10 and TPI between -1 and 1. Landslides are less pronounced on slope zones where slope gradient is <15˚ and >45˚, profile curvature <0, TWI <8 and >18, SPI <10 and TPI >1. Deep soil profiles ranging between 2.5 and 7 meters are a major characteristic of the study area. Soils are characterized by clay pans at a depth ranging between 0.75 and 3 meters within the profiles. The study area is dominated by clay texture, except for the uppermost surface horizons, which are loamy sand. All surface horizons analysed had the percentage of sand, silt and clay ranging from 33 to 55%, 22 to 40% and 10 to 30% respectively. In the deeper horizons, sand was observed to reduce drastically to less than 23%, while clay increased to greater than 50%. The clay content is very high in the deeper horizons exceeding 35%. By implication, such soils with a very high clay content and plasticity index are considered as Vertisols, with a profound influence in the occurrence of landslides. The top soil predominantly contains more quartz, while subsurface horizons have considerable amounts of illite/muscovite as the dominant clay minerals, ranging from 43% to 47 %. The liquid limit, plasticity index, computed weighted plasticity index (PIw), expansiveness (ɛex) and dispersion ranging from 50, 22, 17, 10 and 23 to 66, 44,34,54 and 64, respectively also have strong implications for landslide occurrence. Landslides are not normally experienced during or immediately after extreme rainfall events but occur later in the rainfall season. By implication, this time lag in landslide occurrence and rainfall distribution, is due to the initial infiltration through quartz dominated upper soil layers, before illite/muscovite clays in the lower soil horizons get saturated. Whereas forest cover reduced from 40 % in 1985 to 8% in 2015, cultivated land and settlements increased from 16% and 11% to 52% and 25% respectively during the same period. The distribution of cultivated land decreased in lower slope sections within gradient group < 15˚ by 59%. It however increased in upper sections within gradient cluster 25˚ to 35˚ by over 85% during the study period. There is a shift of cultivated land to the steeper sensitive upper slope elements associated with landslides in the study area. More than 50% of the landslides are occurring on cultivated land, 20% on settlements while less than 15 % and 10% are occurring on grassland and forests with degraded areas respectively. Landslides in Kigezi highlands are triggered by a complex interaction of multiple- factors, including dynamic triggers and ground condition variables. Topographic hollows are convergence zones within the landscape where all the parameters interact to cause landslides. Topographic hollows are therefore potential and actual landslide sites in the study area. Characterized by deep soil horizons with high clay content dominated by illite/muscovite minerals in the sub soils and profile concave forms with moderately steep slopes, topographic hollows are the most vulnerable slope elements to landslide occurrence. The spatial temporal patterns of landslide occurrence in the study area has changed due to increased cultivation of steep middle and upper slopes. Characterized by deep soil horizons with high clay content dominated by illite/muscovite minerals in the sub soils and profile concave forms with moderately steep slopes, topographic hollows are the most vulnerable slope elements to landslide occurrence. The spatial-temporal patterns of landslide occurrence in the study area has changed due to increased cultivation of steep middle and upper slopes. A close spatial and temporal correlation between land use/cover changes and landslide occurrence is discernible. The understanding of these topographical, pedological and land use/cover parameters and their influence on landslide occurrence is important in land management. It is now possible to identify and predict actual and potential landslide zones, and also demarcate safer zones for community activities. The information generated about the area’s topographic, pedological and land cover characteristics should help in vulnerability mitigation and enhance community resilience to landslide hazards in this fragile highland ecosystem. This can be done through designating zones for community activities while avoiding potential landslide zones. It is also recommended that, tree cover restoration be done in the highlands and the farmers encouraged to re-establish terrace farming while avoiding cultivation of sensitive steep middle and upper slope sections.
- Full Text:
- Date Issued: 2018
- Authors: Nseka, Denis
- Date: 2018
- Subjects: Landslides -- Uganda , Land degradation -- Uganda Earth movements
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/33791 , vital:33029
- Description: The frequency and magnitude of landslide occurrence in the Kigezi highlands of South Western Uganda has increased, but the key underpinnings of the occurrences are yet to be understood. The overall aim of this study was to characterize the parameters underpinning landslide occurrence in the Kigezi highlands. This information is important for predicting or identifying actual and potential landslide sites. This should inform policy, particularly in terms of developing early warning systems to landslide hazards in these highlands. The present study analysed the area’s topography, soil properties as well as land use and cover changes underpinning the spatialtemporal distribution of landslide occurrence in the region. The present study focussed on selected topographic parameters including slope gradient, profile curvature, Topographic Wetness Index (TWI), Stream Power Index (SPI), and Topographic Position Index (TPI). These factors were parameterized in the field and GIS environment using a 10 m Digital Elevation Model. Sixty five landslide features were surveyed and mapped. Soil properties were characterised in relation to slope position. Onsite soil property analysis was conducted within the landslide scars, auger holes and full profile representative sites. Furthermore, soil infiltration and strength tests, as well as clay mineralogy analyses were also conducted. An analysis of the spatial-temporal land use and cover changes was undertaken using satellite imagery spanning the period between 1985 and 2015. Landslides were noted to concentrate along topographic hollows in the landscape. The occurrence is dominant where slope gradient is between 25˚ and 35˚, profile curvature between 0.1 and 5, TWI between 8 and 18, SPI >10 and TPI between -1 and 1. Landslides are less pronounced on slope zones where slope gradient is <15˚ and >45˚, profile curvature <0, TWI <8 and >18, SPI <10 and TPI >1. Deep soil profiles ranging between 2.5 and 7 meters are a major characteristic of the study area. Soils are characterized by clay pans at a depth ranging between 0.75 and 3 meters within the profiles. The study area is dominated by clay texture, except for the uppermost surface horizons, which are loamy sand. All surface horizons analysed had the percentage of sand, silt and clay ranging from 33 to 55%, 22 to 40% and 10 to 30% respectively. In the deeper horizons, sand was observed to reduce drastically to less than 23%, while clay increased to greater than 50%. The clay content is very high in the deeper horizons exceeding 35%. By implication, such soils with a very high clay content and plasticity index are considered as Vertisols, with a profound influence in the occurrence of landslides. The top soil predominantly contains more quartz, while subsurface horizons have considerable amounts of illite/muscovite as the dominant clay minerals, ranging from 43% to 47 %. The liquid limit, plasticity index, computed weighted plasticity index (PIw), expansiveness (ɛex) and dispersion ranging from 50, 22, 17, 10 and 23 to 66, 44,34,54 and 64, respectively also have strong implications for landslide occurrence. Landslides are not normally experienced during or immediately after extreme rainfall events but occur later in the rainfall season. By implication, this time lag in landslide occurrence and rainfall distribution, is due to the initial infiltration through quartz dominated upper soil layers, before illite/muscovite clays in the lower soil horizons get saturated. Whereas forest cover reduced from 40 % in 1985 to 8% in 2015, cultivated land and settlements increased from 16% and 11% to 52% and 25% respectively during the same period. The distribution of cultivated land decreased in lower slope sections within gradient group < 15˚ by 59%. It however increased in upper sections within gradient cluster 25˚ to 35˚ by over 85% during the study period. There is a shift of cultivated land to the steeper sensitive upper slope elements associated with landslides in the study area. More than 50% of the landslides are occurring on cultivated land, 20% on settlements while less than 15 % and 10% are occurring on grassland and forests with degraded areas respectively. Landslides in Kigezi highlands are triggered by a complex interaction of multiple- factors, including dynamic triggers and ground condition variables. Topographic hollows are convergence zones within the landscape where all the parameters interact to cause landslides. Topographic hollows are therefore potential and actual landslide sites in the study area. Characterized by deep soil horizons with high clay content dominated by illite/muscovite minerals in the sub soils and profile concave forms with moderately steep slopes, topographic hollows are the most vulnerable slope elements to landslide occurrence. The spatial temporal patterns of landslide occurrence in the study area has changed due to increased cultivation of steep middle and upper slopes. Characterized by deep soil horizons with high clay content dominated by illite/muscovite minerals in the sub soils and profile concave forms with moderately steep slopes, topographic hollows are the most vulnerable slope elements to landslide occurrence. The spatial-temporal patterns of landslide occurrence in the study area has changed due to increased cultivation of steep middle and upper slopes. A close spatial and temporal correlation between land use/cover changes and landslide occurrence is discernible. The understanding of these topographical, pedological and land use/cover parameters and their influence on landslide occurrence is important in land management. It is now possible to identify and predict actual and potential landslide zones, and also demarcate safer zones for community activities. The information generated about the area’s topographic, pedological and land cover characteristics should help in vulnerability mitigation and enhance community resilience to landslide hazards in this fragile highland ecosystem. This can be done through designating zones for community activities while avoiding potential landslide zones. It is also recommended that, tree cover restoration be done in the highlands and the farmers encouraged to re-establish terrace farming while avoiding cultivation of sensitive steep middle and upper slope sections.
- Full Text:
- Date Issued: 2018