Normative self-perceptions of journalists in Nigeria : the case of the Guardian newspaper
- Authors: Tiri, Judith
- Date: 2014
- Subjects: Guardian (Nigeria) , Nigeria -- In mass media , Nigeria -- Politics and government -- In mass media , Newspapers -- Nigeria , Journalism -- Political aspects -- Nigeria , Journalists -- Nigeria -- Psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3523
- Description: The study aims at interrogating the self - perceptions of journalists in Nigeria. The study is an attempt to answer some questions as: what contributions have journalists made to the democratization of Nigeria from 1960 to date? What role(s) did the media play during and after the transition to democracy? To what extent have the activities of politicians and the business class affected t he media’s social responsibility? What are the self-perceptions of journalists working in Nigeria’s The Guardian newspaper? The studies on normative theories of the press, Journalism Culture, and the perceived influences on journalism practice in a democra cy were adapted to answer the afore-listed questions. The works on how elite continuity and transitology models affect the perceptions of journalists in new democracies were also used to answer the questions posed. Since the field of research of the preced ing works is the West, the Nigerian experience points to issues that were not addressed in the prior studies because of the latter’s unique socio-political, historical, economic and ethno-religious structures . The data were collected and analyzed according to the QualitaQualitative paradigm, using in-depth semi-structured individual interviews with journalists working at The Guardian newspaper. The findings suggest that the journalists have made positive contributions to Nigeria’s democratization. The journalists that support this thesis claim that the self-perceptions of their role have changed from an adversarial position to a democratically-defined social responsibility role. This is because journalists ensure that government policies are implemented and the iss ues that affect the masses are reported. The findings show that in spite of the shift to democratization some challenges have remained, for example the journalists’ lives are not safe ; they collect bribes which are popularly called brown envelopes in Nigeria, write biased stories, and hold partisan relationships with the politicians and entrepreneurial elites and so on. The study acknowledges that democratization is in a continuum and that (the stakeholders or) civil society, journalists, the state and the entrepreneurial elites must contribute to deepen Nigeria’s democracy. The study suggests a self-perception theory that uses individual structures and institutions of a country to guide the stakeholders to play roles that will deepen democracy.
- Full Text:
- Authors: Tiri, Judith
- Date: 2014
- Subjects: Guardian (Nigeria) , Nigeria -- In mass media , Nigeria -- Politics and government -- In mass media , Newspapers -- Nigeria , Journalism -- Political aspects -- Nigeria , Journalists -- Nigeria -- Psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3523
- Description: The study aims at interrogating the self - perceptions of journalists in Nigeria. The study is an attempt to answer some questions as: what contributions have journalists made to the democratization of Nigeria from 1960 to date? What role(s) did the media play during and after the transition to democracy? To what extent have the activities of politicians and the business class affected t he media’s social responsibility? What are the self-perceptions of journalists working in Nigeria’s The Guardian newspaper? The studies on normative theories of the press, Journalism Culture, and the perceived influences on journalism practice in a democra cy were adapted to answer the afore-listed questions. The works on how elite continuity and transitology models affect the perceptions of journalists in new democracies were also used to answer the questions posed. Since the field of research of the preced ing works is the West, the Nigerian experience points to issues that were not addressed in the prior studies because of the latter’s unique socio-political, historical, economic and ethno-religious structures . The data were collected and analyzed according to the QualitaQualitative paradigm, using in-depth semi-structured individual interviews with journalists working at The Guardian newspaper. The findings suggest that the journalists have made positive contributions to Nigeria’s democratization. The journalists that support this thesis claim that the self-perceptions of their role have changed from an adversarial position to a democratically-defined social responsibility role. This is because journalists ensure that government policies are implemented and the iss ues that affect the masses are reported. The findings show that in spite of the shift to democratization some challenges have remained, for example the journalists’ lives are not safe ; they collect bribes which are popularly called brown envelopes in Nigeria, write biased stories, and hold partisan relationships with the politicians and entrepreneurial elites and so on. The study acknowledges that democratization is in a continuum and that (the stakeholders or) civil society, journalists, the state and the entrepreneurial elites must contribute to deepen Nigeria’s democracy. The study suggests a self-perception theory that uses individual structures and institutions of a country to guide the stakeholders to play roles that will deepen democracy.
- Full Text:
One leg at a time
- Authors: Vivier, Lincky Elmé
- Date: 2014
- Subjects: Creative writing (Higher education) -- Research -- South Africa , Creative writing -- Poetry , South African poetry (English) -- Study and teaching (Higher) , South African poetry (English) -- 21st century , English language -- Writing
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:5974 , http://hdl.handle.net/10962/d1012945
- Description: This collection of poems explores the boundaries between certainty and uncertainty, between the desire for meaning and the destabilisation of meaning. The content encompasses everyday life, love and loss, and the ambiguities are reflected in the forms used, so that, for instance, the linear continuity of narrative and the musicality of the lyric may be juxtaposed with the fragmented and imagistic leaps of the associative poem.
- Full Text:
- Authors: Vivier, Lincky Elmé
- Date: 2014
- Subjects: Creative writing (Higher education) -- Research -- South Africa , Creative writing -- Poetry , South African poetry (English) -- Study and teaching (Higher) , South African poetry (English) -- 21st century , English language -- Writing
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:5974 , http://hdl.handle.net/10962/d1012945
- Description: This collection of poems explores the boundaries between certainty and uncertainty, between the desire for meaning and the destabilisation of meaning. The content encompasses everyday life, love and loss, and the ambiguities are reflected in the forms used, so that, for instance, the linear continuity of narrative and the musicality of the lyric may be juxtaposed with the fragmented and imagistic leaps of the associative poem.
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Optimizing MIDAS III over South Africa
- Authors: Giday, Nigussie Mezgebe
- Date: 2014
- Subjects: Multi-Instrument Data Analysis System (MIDAS) , Global Positioning System , Ionosphere -- South Africa , Ionospheric electron density -- South Africa , Ionosondes -- South Africa , Tomography -- Scientific applications -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5517 , http://hdl.handle.net/10962/d1011277 , Multi-Instrument Data Analysis System (MIDAS) , Global Positioning System , Ionosphere -- South Africa , Ionospheric electron density -- South Africa , Ionosondes -- South Africa , Tomography -- Scientific applications -- South Africa
- Description: In this thesis an ionospheric tomographic algorithm called Multi-Instrument Data Anal- ysis System (MIDAS) is used to reconstruct electron density profiles using the Global Positioning System (GPS) data recorded from 53 GPS receivers over the South African region. MIDAS, developed by the Invert group at the University of Bath in the UK, is an inversion algorithm that produces a time dependent 3D image of the electron density of the ionosphere. GPS receivers record the time delay and phase advance of the trans- ionospheric GPS signals that traverse through the ionosphere from which the ionospheric parameter called Total Electron Content (TEC) can be computed. TEC, the line integral of the electron density along the satellite-receiver signal path, is ingested by ionospheric tomographic algorithms such as MIDAS to produce a time dependent 3D electron density profile. In order to validate electron density profiles from MIDAS, MIDAS derived NmF2 values were compared with ionosonde derived NmF2 values extracted from their respective 1D electron density profiles at 15 minute intervals for all four South African ionosonde stations (Grahamstown, Hermanus, Louisvale, and Madimbo). MIDAS 2D images of the electron density showed good diurnal and seasonal patterns; where a comparison of the 2D images at 12h00 UT for all the validation days exhibited maximum electron concentration during the autumn and summer and a minimum during the winter. A root mean square error (rmse) value as small as 0.88x 10¹¹[el=m³] was calculated for the Louisvale ionosonde station during the winter season and a maximum rmse value of 1.92x 10¹¹[el=m³] was ob- tained during the autumn season. The r² values were the least during the autumn and relatively large during summer and winter; similarly the rmse values were found to be a maximum during the autumn and a minimum during the winter indicating that MIDAS performs better during the winter than during the autumn and spring seasons. It is also observed that MIDAS performs better at Louisvale and Madimbo than at Grahamstown and Hermanus. In conclusion, the MIDAS reconstruction has showed good agreement with the ionosonde measurements; therefore, MIDAS can be considered a useful tool to study the ionosphere over the South African region.
- Full Text:
- Authors: Giday, Nigussie Mezgebe
- Date: 2014
- Subjects: Multi-Instrument Data Analysis System (MIDAS) , Global Positioning System , Ionosphere -- South Africa , Ionospheric electron density -- South Africa , Ionosondes -- South Africa , Tomography -- Scientific applications -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5517 , http://hdl.handle.net/10962/d1011277 , Multi-Instrument Data Analysis System (MIDAS) , Global Positioning System , Ionosphere -- South Africa , Ionospheric electron density -- South Africa , Ionosondes -- South Africa , Tomography -- Scientific applications -- South Africa
- Description: In this thesis an ionospheric tomographic algorithm called Multi-Instrument Data Anal- ysis System (MIDAS) is used to reconstruct electron density profiles using the Global Positioning System (GPS) data recorded from 53 GPS receivers over the South African region. MIDAS, developed by the Invert group at the University of Bath in the UK, is an inversion algorithm that produces a time dependent 3D image of the electron density of the ionosphere. GPS receivers record the time delay and phase advance of the trans- ionospheric GPS signals that traverse through the ionosphere from which the ionospheric parameter called Total Electron Content (TEC) can be computed. TEC, the line integral of the electron density along the satellite-receiver signal path, is ingested by ionospheric tomographic algorithms such as MIDAS to produce a time dependent 3D electron density profile. In order to validate electron density profiles from MIDAS, MIDAS derived NmF2 values were compared with ionosonde derived NmF2 values extracted from their respective 1D electron density profiles at 15 minute intervals for all four South African ionosonde stations (Grahamstown, Hermanus, Louisvale, and Madimbo). MIDAS 2D images of the electron density showed good diurnal and seasonal patterns; where a comparison of the 2D images at 12h00 UT for all the validation days exhibited maximum electron concentration during the autumn and summer and a minimum during the winter. A root mean square error (rmse) value as small as 0.88x 10¹¹[el=m³] was calculated for the Louisvale ionosonde station during the winter season and a maximum rmse value of 1.92x 10¹¹[el=m³] was ob- tained during the autumn season. The r² values were the least during the autumn and relatively large during summer and winter; similarly the rmse values were found to be a maximum during the autumn and a minimum during the winter indicating that MIDAS performs better during the winter than during the autumn and spring seasons. It is also observed that MIDAS performs better at Louisvale and Madimbo than at Grahamstown and Hermanus. In conclusion, the MIDAS reconstruction has showed good agreement with the ionosonde measurements; therefore, MIDAS can be considered a useful tool to study the ionosphere over the South African region.
- Full Text:
Ore distribution controls of the Navachab Gold Mine, Damara Belt, Karibib District, Namibia
- Authors: Slabbert, W L
- Date: 2014
- Subjects: Gold ores -- Namibia , Ore deposits -- Namibia
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5082 , http://hdl.handle.net/10962/d1016364
- Description: The Navachab Gold mine, an orogenic lode gold deposit, is located in the Karibib region of the Pan-African (ca. 550-500) Damara belt of central Namibia. Gold mineralisation is developed within the steeply NW dipping limb of the Karibib dome. Here, ore envelopes trend along three main orientations: a) trends shallowly towards the NE (the down plunge extent), b) trends sub-vertically in and along the down plunge extent and c) trends sub-horizontally across the down plunge extent. The down plunge extent represents the bulk of the gold mineralisation, hosting the only high grade ores mined at Navachab. As such, past work primarily focused on establishing the controls to the mineralisation observed here. The sub-vertical and sub–horizontal ore trends are seen as secondary, lower grade, being hosted in the footwall. By cutting pushbacks into the footwall, in an effort to regain access to high grade pit bottom, future gold production almost exclusively relies upon optimally mining these ores. This underlines the importance to investigate and outline the mineralising controls to the secondary ore trends. This study identified the following prevailing quartz vein sets developed within the footwall, set (1) dips shallowly towards the NE (conjugate vein set), (2) steeply towards the NW (bedding parallel veins) and (3) steeply towards the SE (S2 foliation parallel). The NW and SE dipping sets contain high average gold grades, occurring at an infrequent vein density. The NE dipping veins, as a result of occurrence density alone, was highlighted as the dominant gold hosting set. Veining occurred during the late stages of the NW-SE directed, sub-horizontal shortening (D2) event and is associated with top-to-the-NW thrusting and NW-verging folds. Re-Os molybdenite dating from auriferous quartz veins indicates mineralisation occurred at 525-520 Ma. As crustal shortening amplified the Karibib dome, flexural flow developed fractures along bedding planes, providing the control to bedding parallel veins (NW dipping). With continued crustal compression the dome later experienced fold lock up associated with reduced mean rock stress and sub-horizontal extension occurred along the steeply NW dipping limb. Horizontal extensional gashes sucked in fluids to form the shallowly NE dipping conjugate vein set. These features suggest the regional D2 strain as the first-order control to quartz vein development, down plunge and within the footwall ores. To further define the secondary ores, lithological and structural controls were evaluated on a more detailed local scale. With equal amounts of biotite schist and calc-silicate host rock (bulk of the footwall lithology) material analysed, the biotite schist units were found to contain a larger volume amount of quartz veins. The mineralisation incurred is also developed at higher average gold grades compared to that of the calc-silicates, demonstrating biotite schist having the optimal rheology for quartz vein emplacement. Normal faulting and thrusting occurs widespread, at all scale levels, across the footwall. These were primarily observed along bedding foliations and secondly at higher angles cutting across foliation. The study did not constrain the extent of these, but can conclude faulting plays a very prominent role in re-distributing the secondary ores parallel to bedding along sub-vertical trend planes. Great care should be placed in properly modelling these with 3D software such as Leapfrog. The Navachab gold mineralisation came about as a result of convergent and collisional tectonics activating metamorphic dehydration of the crustal metapelites. As these fluids ascended they absorbed gold from the crust, emplaced by either a magmatic or paleo-placer source. The gold enriched hydrothermal fluids amalgamated in large scale 1ste order structures (shearing of the steep NW limb of the Karibib Dome, the Mon Repos Thrust Zone) that acted as primary active fluid path ways. In the case of Navachab the gold enriched fluid fluxed along these pathways while interacting with fluid sinks related to a physical throttle (brittle schist, folding, bedding parallel shears) and/or a chemical trap (marbles). By summarising and detailing the fluid sinks and active fluid pathways identified by this and previous works, it is strongly recommended that a mineral approach system be designed and implemented as targeting model to lead future exploration endeavours.
- Full Text:
- Authors: Slabbert, W L
- Date: 2014
- Subjects: Gold ores -- Namibia , Ore deposits -- Namibia
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5082 , http://hdl.handle.net/10962/d1016364
- Description: The Navachab Gold mine, an orogenic lode gold deposit, is located in the Karibib region of the Pan-African (ca. 550-500) Damara belt of central Namibia. Gold mineralisation is developed within the steeply NW dipping limb of the Karibib dome. Here, ore envelopes trend along three main orientations: a) trends shallowly towards the NE (the down plunge extent), b) trends sub-vertically in and along the down plunge extent and c) trends sub-horizontally across the down plunge extent. The down plunge extent represents the bulk of the gold mineralisation, hosting the only high grade ores mined at Navachab. As such, past work primarily focused on establishing the controls to the mineralisation observed here. The sub-vertical and sub–horizontal ore trends are seen as secondary, lower grade, being hosted in the footwall. By cutting pushbacks into the footwall, in an effort to regain access to high grade pit bottom, future gold production almost exclusively relies upon optimally mining these ores. This underlines the importance to investigate and outline the mineralising controls to the secondary ore trends. This study identified the following prevailing quartz vein sets developed within the footwall, set (1) dips shallowly towards the NE (conjugate vein set), (2) steeply towards the NW (bedding parallel veins) and (3) steeply towards the SE (S2 foliation parallel). The NW and SE dipping sets contain high average gold grades, occurring at an infrequent vein density. The NE dipping veins, as a result of occurrence density alone, was highlighted as the dominant gold hosting set. Veining occurred during the late stages of the NW-SE directed, sub-horizontal shortening (D2) event and is associated with top-to-the-NW thrusting and NW-verging folds. Re-Os molybdenite dating from auriferous quartz veins indicates mineralisation occurred at 525-520 Ma. As crustal shortening amplified the Karibib dome, flexural flow developed fractures along bedding planes, providing the control to bedding parallel veins (NW dipping). With continued crustal compression the dome later experienced fold lock up associated with reduced mean rock stress and sub-horizontal extension occurred along the steeply NW dipping limb. Horizontal extensional gashes sucked in fluids to form the shallowly NE dipping conjugate vein set. These features suggest the regional D2 strain as the first-order control to quartz vein development, down plunge and within the footwall ores. To further define the secondary ores, lithological and structural controls were evaluated on a more detailed local scale. With equal amounts of biotite schist and calc-silicate host rock (bulk of the footwall lithology) material analysed, the biotite schist units were found to contain a larger volume amount of quartz veins. The mineralisation incurred is also developed at higher average gold grades compared to that of the calc-silicates, demonstrating biotite schist having the optimal rheology for quartz vein emplacement. Normal faulting and thrusting occurs widespread, at all scale levels, across the footwall. These were primarily observed along bedding foliations and secondly at higher angles cutting across foliation. The study did not constrain the extent of these, but can conclude faulting plays a very prominent role in re-distributing the secondary ores parallel to bedding along sub-vertical trend planes. Great care should be placed in properly modelling these with 3D software such as Leapfrog. The Navachab gold mineralisation came about as a result of convergent and collisional tectonics activating metamorphic dehydration of the crustal metapelites. As these fluids ascended they absorbed gold from the crust, emplaced by either a magmatic or paleo-placer source. The gold enriched hydrothermal fluids amalgamated in large scale 1ste order structures (shearing of the steep NW limb of the Karibib Dome, the Mon Repos Thrust Zone) that acted as primary active fluid path ways. In the case of Navachab the gold enriched fluid fluxed along these pathways while interacting with fluid sinks related to a physical throttle (brittle schist, folding, bedding parallel shears) and/or a chemical trap (marbles). By summarising and detailing the fluid sinks and active fluid pathways identified by this and previous works, it is strongly recommended that a mineral approach system be designed and implemented as targeting model to lead future exploration endeavours.
- Full Text:
Organisational culture and leadership competencies in ABSA Business Bank: Enterprise Business, Gauteng
- Authors: Funani, Simphiwe Vincent
- Date: 2014
- Subjects: ABSA Bank Corporate culture Organizational behavior Leadership Leadership -- Ability testing Business enterprises -- Personnel management Executives -- Training of Organizational effectiveness
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:824 , http://hdl.handle.net/10962/d1011286
- Description: From Integrative summary: This document consists of three sections namely, an evaluation report (section 1), literature review (section 2), and research methodology (section 3). The evaluation report sets out the terms of reference for the research as well as identifying the objectives of the research. It also contains a summary of the literature review section, as well as a research methodology section summary. The literature review section contains a detailed review of the literature used in this study. This section sets out by reviewing existing literature on the topic of leadership, discussing the key elements of organisational culture and includes a short discussion on the typologies of culture. The Competing Values Framework as an organisational culture typology is discussed in greater detail, since it forms the foundation upon which the measurement and data collection tools for this research are founded. The research methodology section explains the research methodology and design employed in this study. This section also addresses some of the ethical considerations for this research, as well as how the researcher addressed them. There is also a brief discussion on the limitations of the research and the application of the results. This research focused on a business unit within Absa Business Bank, named Enterprise Business Gauteng Region, with the aim of investigating the “current organisational culture” in the business unit and the leadership competencies profile of its 11 Sales Managers. This was to provide the basis and departure point for the strategic organisational culture change that the new business unit head would have wanted to effect as the business has a history of non-performance, which the new business unit head aims to change. In order to diagnose the “current organisational culture” type, an organisational culture measurement tool based on the Competing Values Framework was used. The Competing Values Framework is a four-category organisational culture typology developed by Cameron and Quinn. The framework is based on two dimensions, how stable or flexible the organisation is, and how externally or internally focused it is. This framework was also employed to establish the leadership competencies profile of Sales Managers, as observed and experienced by the frontline staff, as well as the “desired organisational culture”, as intended by the new business unit head. Through hypotheses testing, the research revealed a statistically significant difference in perceptions of culture between males and females in the business unit. The perceptions of the female frontline staff about the “current” business unit culture indicated that they find it not to be empowering and less allowing for individuality and risk taking when compared to the male staff. The research also concluded that there is no statistically significant difference between leadership competencies associated with the four categories of the Competing Values Framework in the business unit. Comparisons between the “current” and the “desired” organisational culture revealed a misalignment. The main recommendations to the new business unit head were to get the leadership competencies of the Sales Managers aligned with the “desired organisational culture” state, and drive a purposive organisational culture change effort. To support this culture change, the espoused values of the business unit would need to be aligned to the desired culture state. To address the differences in perceptions of culture between males and females the business unit head would need to be mindful of the greater need to empower women either in their current roles, or by way of promotions to senior roles.
- Full Text:
- Authors: Funani, Simphiwe Vincent
- Date: 2014
- Subjects: ABSA Bank Corporate culture Organizational behavior Leadership Leadership -- Ability testing Business enterprises -- Personnel management Executives -- Training of Organizational effectiveness
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:824 , http://hdl.handle.net/10962/d1011286
- Description: From Integrative summary: This document consists of three sections namely, an evaluation report (section 1), literature review (section 2), and research methodology (section 3). The evaluation report sets out the terms of reference for the research as well as identifying the objectives of the research. It also contains a summary of the literature review section, as well as a research methodology section summary. The literature review section contains a detailed review of the literature used in this study. This section sets out by reviewing existing literature on the topic of leadership, discussing the key elements of organisational culture and includes a short discussion on the typologies of culture. The Competing Values Framework as an organisational culture typology is discussed in greater detail, since it forms the foundation upon which the measurement and data collection tools for this research are founded. The research methodology section explains the research methodology and design employed in this study. This section also addresses some of the ethical considerations for this research, as well as how the researcher addressed them. There is also a brief discussion on the limitations of the research and the application of the results. This research focused on a business unit within Absa Business Bank, named Enterprise Business Gauteng Region, with the aim of investigating the “current organisational culture” in the business unit and the leadership competencies profile of its 11 Sales Managers. This was to provide the basis and departure point for the strategic organisational culture change that the new business unit head would have wanted to effect as the business has a history of non-performance, which the new business unit head aims to change. In order to diagnose the “current organisational culture” type, an organisational culture measurement tool based on the Competing Values Framework was used. The Competing Values Framework is a four-category organisational culture typology developed by Cameron and Quinn. The framework is based on two dimensions, how stable or flexible the organisation is, and how externally or internally focused it is. This framework was also employed to establish the leadership competencies profile of Sales Managers, as observed and experienced by the frontline staff, as well as the “desired organisational culture”, as intended by the new business unit head. Through hypotheses testing, the research revealed a statistically significant difference in perceptions of culture between males and females in the business unit. The perceptions of the female frontline staff about the “current” business unit culture indicated that they find it not to be empowering and less allowing for individuality and risk taking when compared to the male staff. The research also concluded that there is no statistically significant difference between leadership competencies associated with the four categories of the Competing Values Framework in the business unit. Comparisons between the “current” and the “desired” organisational culture revealed a misalignment. The main recommendations to the new business unit head were to get the leadership competencies of the Sales Managers aligned with the “desired organisational culture” state, and drive a purposive organisational culture change effort. To support this culture change, the espoused values of the business unit would need to be aligned to the desired culture state. To address the differences in perceptions of culture between males and females the business unit head would need to be mindful of the greater need to empower women either in their current roles, or by way of promotions to senior roles.
- Full Text:
Oxidative desulfurization of fuel oils-catalytic oxidation and adsorptive removal of organosulfur compounds
- Authors: Ogunlaja, Adeniyi Sunday
- Date: 2014
- Subjects: Organosulfur compounds , Organosulfur compounds -- Oxidation , Organosulfur compounds -- Absorption and adsorption , Petroleum as fuel , Catalysis , Imprinted polymers , Molecular imprinting , Nanofibers , Electrospinning
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4498 , http://hdl.handle.net/10962/d1013152
- Description: The syntheses and evaluation of oxidovanadium(IV) complexes as catalysts for the oxidation of refractory organosulfur compounds in fuels is presented. The sulfones produced from the oxidation reaction were removed from fuel oils by employing molecularly imprinted polymers (MIPs). The oxidovanadium(IV) homogeneous catalyst, [V ͥ ͮ O(sal-HBPD)], as well as its heterogeneous polymer supported derivatives, poly[V ͥ ͮ O(sal-AHBPD)] and poly[V ͥ ͮ O(allylSB-co-EGDMA)], were synthesized and fully characterized by elemental analysis, FTIR, UV-Vis, XPS, AFM, SEM, BET and single crystal XRD for [V ͥ ͮ O(sal-HBPD)]. The MIPs were also characterized by elemental analysis, FTIR, SEM, EDX and BET. The catalyzed oxidation of fuel oil model sulfur compounds, thiophene (TH), benzothiophene (BT), dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT), was conducted under batch and continuous flow processes at 40°C by using tert-butylhydroperoxide (t-BuOOH) as oxidant. The continuous flow oxidation process presented the highest overall conversions and very high selectivity for sulfones. Maximum oxidation conversions of 71%, 89%, 99% and 88% was achieved for TH, BT, DBT and 4,6-DMDBT respectively when poly[V ͥ ͮ O(allylSB-co-EGDMA)] was employed at a flow-rate of 1 mL/h with over 90% sulfone selectivity. The process was further applied to the oxidation of hydro-treated diesel containing 385 ± 4.6 ppm of sulfur (mainly dibenzothiophene and dibenzothiophene derivatives), and this resulted to a high sulfur oxidation yield (> 99%), thus producing polar sulfones which are extractible by polar solid phase extractants. Adsorption of the polar sulfone compounds was carried-out by employing MIPs which were fabricated through the formation of recognition sites complementary to oxidized sulfur-containing compounds (sulfones) on electrospun polybenzimidazole (PBI) nanofibers, cross-linked chitosan microspheres and electrospun chitosan nanofibers. Adsorption of benzothiophene sulfone (BTO₂), dibenzothiophene sulfone (DBTO₂) and 4,6-dimethyldibenzothiophene sulfone (4,6-DMDBTO₂) on the various molecularly imprinted adsorbents presented a Freundlich (multi-layered) adsorption isotherm which indicated interaction of adsorbed organosulfur compounds. Maximum adsorption observed for BTO₂, DBTO₂ and 4,6-DMDBTO₂ respectively was 8.5 ± 0.6 mg/g, 7.0 ± 0.5 mg/g and 6.6 ± 0.7 mg/g when imprinted chitosan nanofibers were employed, 4.9 ± 0.5 mg/g, 4.2 ± 0.7 mg/g and 3.9 ± 0.6 mg/g on molecularly imprinted chitosan microspheres, and 28.5 ± 0.4 mg/g, 29.8 ± 2.2 mg/g and 20.1 ± 1.4 mg/g on molecularly imprinted PBI nanofibers. Application of electrospun chitosan nanofibers on oxidized hydro-treated diesel presented a sulfur removal capacity of 84%, leaving 62 ± 3.2 ppm S in the fuel, while imprinted PBI electrospun nanofibers displayed excellent sulfur removal, keeping sulfur in the fuel after the oxidation/adsorption below the determined limit of detection (LOD), which is 2.4 ppm S. The high level of sulfur removal displayed by imprinted PBI nanofibers was ascribed to hydrogen bonding effects, and π-π stacking between aromatic sulfone compounds and the benzimidazole ring which were confirmed by chemical modelling with density functional theory (DFT) as well as the imprinting effect. The home-made pressurized hot water extraction (PHWE) system was applied for extraction/desorption of sulfone compounds adsorbed on the PBI nanofibers at a flow rate of 1 mL/min and at 150°C with an applied pressure of 30 bars. Application of molecularly imprinted PBI nanofibers for the desulfurization of oxidized hydro-treated fuel showed potential for use in refining industries to reach ultra-low sulfur fuel level, which falls below the 10 ppm sulfur limit which is mandated by the environmental protection agency (EPA) from 2015.
- Full Text:
- Authors: Ogunlaja, Adeniyi Sunday
- Date: 2014
- Subjects: Organosulfur compounds , Organosulfur compounds -- Oxidation , Organosulfur compounds -- Absorption and adsorption , Petroleum as fuel , Catalysis , Imprinted polymers , Molecular imprinting , Nanofibers , Electrospinning
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4498 , http://hdl.handle.net/10962/d1013152
- Description: The syntheses and evaluation of oxidovanadium(IV) complexes as catalysts for the oxidation of refractory organosulfur compounds in fuels is presented. The sulfones produced from the oxidation reaction were removed from fuel oils by employing molecularly imprinted polymers (MIPs). The oxidovanadium(IV) homogeneous catalyst, [V ͥ ͮ O(sal-HBPD)], as well as its heterogeneous polymer supported derivatives, poly[V ͥ ͮ O(sal-AHBPD)] and poly[V ͥ ͮ O(allylSB-co-EGDMA)], were synthesized and fully characterized by elemental analysis, FTIR, UV-Vis, XPS, AFM, SEM, BET and single crystal XRD for [V ͥ ͮ O(sal-HBPD)]. The MIPs were also characterized by elemental analysis, FTIR, SEM, EDX and BET. The catalyzed oxidation of fuel oil model sulfur compounds, thiophene (TH), benzothiophene (BT), dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT), was conducted under batch and continuous flow processes at 40°C by using tert-butylhydroperoxide (t-BuOOH) as oxidant. The continuous flow oxidation process presented the highest overall conversions and very high selectivity for sulfones. Maximum oxidation conversions of 71%, 89%, 99% and 88% was achieved for TH, BT, DBT and 4,6-DMDBT respectively when poly[V ͥ ͮ O(allylSB-co-EGDMA)] was employed at a flow-rate of 1 mL/h with over 90% sulfone selectivity. The process was further applied to the oxidation of hydro-treated diesel containing 385 ± 4.6 ppm of sulfur (mainly dibenzothiophene and dibenzothiophene derivatives), and this resulted to a high sulfur oxidation yield (> 99%), thus producing polar sulfones which are extractible by polar solid phase extractants. Adsorption of the polar sulfone compounds was carried-out by employing MIPs which were fabricated through the formation of recognition sites complementary to oxidized sulfur-containing compounds (sulfones) on electrospun polybenzimidazole (PBI) nanofibers, cross-linked chitosan microspheres and electrospun chitosan nanofibers. Adsorption of benzothiophene sulfone (BTO₂), dibenzothiophene sulfone (DBTO₂) and 4,6-dimethyldibenzothiophene sulfone (4,6-DMDBTO₂) on the various molecularly imprinted adsorbents presented a Freundlich (multi-layered) adsorption isotherm which indicated interaction of adsorbed organosulfur compounds. Maximum adsorption observed for BTO₂, DBTO₂ and 4,6-DMDBTO₂ respectively was 8.5 ± 0.6 mg/g, 7.0 ± 0.5 mg/g and 6.6 ± 0.7 mg/g when imprinted chitosan nanofibers were employed, 4.9 ± 0.5 mg/g, 4.2 ± 0.7 mg/g and 3.9 ± 0.6 mg/g on molecularly imprinted chitosan microspheres, and 28.5 ± 0.4 mg/g, 29.8 ± 2.2 mg/g and 20.1 ± 1.4 mg/g on molecularly imprinted PBI nanofibers. Application of electrospun chitosan nanofibers on oxidized hydro-treated diesel presented a sulfur removal capacity of 84%, leaving 62 ± 3.2 ppm S in the fuel, while imprinted PBI electrospun nanofibers displayed excellent sulfur removal, keeping sulfur in the fuel after the oxidation/adsorption below the determined limit of detection (LOD), which is 2.4 ppm S. The high level of sulfur removal displayed by imprinted PBI nanofibers was ascribed to hydrogen bonding effects, and π-π stacking between aromatic sulfone compounds and the benzimidazole ring which were confirmed by chemical modelling with density functional theory (DFT) as well as the imprinting effect. The home-made pressurized hot water extraction (PHWE) system was applied for extraction/desorption of sulfone compounds adsorbed on the PBI nanofibers at a flow rate of 1 mL/min and at 150°C with an applied pressure of 30 bars. Application of molecularly imprinted PBI nanofibers for the desulfurization of oxidized hydro-treated fuel showed potential for use in refining industries to reach ultra-low sulfur fuel level, which falls below the 10 ppm sulfur limit which is mandated by the environmental protection agency (EPA) from 2015.
- Full Text:
Perceptions of organisational commitment within a selected Chinese organisation in South Africa: a case study approach
- Authors: Paterson, Steven James
- Date: 2014
- Subjects: Organizational commitment -- South Africa , Personnel management -- South Africa , Employee motivation -- South Africa , International business enterprises -- South Africa , China -- Foreign economic relations -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1201 , http://hdl.handle.net/10962/d1013094
- Description: Chinese organisations are benefiting from increasing support from the Chinese government to enter into Africa. It is believed that over 2 000 Chinese organisations are operational in Africa, contributing greatly to employment within the continent. Despite the importance of Chinese organisations and their operations in Africa, very little research has been done on individual and organisational issues in Chinese organisations operating in Africa, and more specifically the local employees' organisational commitment to such organisations. The organisational commitment of South African employees within Chinese organisations in South Africa is important as it promotes the success of Chinese business, which may promote further investment into the country, as well as the use of local human resources. The primary aim of this research was therefore to conduct a literature and empirical study into the levels of and factors influencing the organisational commitment of South African employees in a selected Chinese organisation in South Africa. For the purposes of this study, a single case study approach, located within the phenomenological research paradigm, was used. A large multinational Chinese organisation with operations in South Africa agreed to participate in this study. The research made use of a descriptive case study design. To give effect to the primary aim of the study, three research objectives were identified. Firstly, to identify and describe key factors influencing local employee commitment. Secondly, to identify and describe current commitment levels amongst local employees, and lastly, to propose recommendations to improve local employee commitment and its implications for the appropriate management of human resources within the Chinese organisation. Data were collected by means of in-depth, semi-structured interviews with 20 participating employees at four organisational branches across South Africa. Moreover, although the interview transcripts were the primary source of data, the collection process was enriched with the use of organisational and participant observations. The findings of this research revealed ten factors which are perceived to influence the commitment of South African employees within the organisation, namely: Open communication, Leadership, Supervisory support, Opportunities for training and development, Compensation, Job security, Promotional opportunities, Shared values, Recognition and Trust. Certain issues were raised by the participants during the in-depth interviews, most notably the limited opportunities for training, development and promotion, as well as issues regarding the perceived limited compensation received from the organisation. Despite these issues, the general findings relating to the levels of commitment in the organisation were positive for the organisation under study, with the majority of the participants being perceived to demonstrate high levels of affective, normative and continuance commitment.
- Full Text:
- Authors: Paterson, Steven James
- Date: 2014
- Subjects: Organizational commitment -- South Africa , Personnel management -- South Africa , Employee motivation -- South Africa , International business enterprises -- South Africa , China -- Foreign economic relations -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1201 , http://hdl.handle.net/10962/d1013094
- Description: Chinese organisations are benefiting from increasing support from the Chinese government to enter into Africa. It is believed that over 2 000 Chinese organisations are operational in Africa, contributing greatly to employment within the continent. Despite the importance of Chinese organisations and their operations in Africa, very little research has been done on individual and organisational issues in Chinese organisations operating in Africa, and more specifically the local employees' organisational commitment to such organisations. The organisational commitment of South African employees within Chinese organisations in South Africa is important as it promotes the success of Chinese business, which may promote further investment into the country, as well as the use of local human resources. The primary aim of this research was therefore to conduct a literature and empirical study into the levels of and factors influencing the organisational commitment of South African employees in a selected Chinese organisation in South Africa. For the purposes of this study, a single case study approach, located within the phenomenological research paradigm, was used. A large multinational Chinese organisation with operations in South Africa agreed to participate in this study. The research made use of a descriptive case study design. To give effect to the primary aim of the study, three research objectives were identified. Firstly, to identify and describe key factors influencing local employee commitment. Secondly, to identify and describe current commitment levels amongst local employees, and lastly, to propose recommendations to improve local employee commitment and its implications for the appropriate management of human resources within the Chinese organisation. Data were collected by means of in-depth, semi-structured interviews with 20 participating employees at four organisational branches across South Africa. Moreover, although the interview transcripts were the primary source of data, the collection process was enriched with the use of organisational and participant observations. The findings of this research revealed ten factors which are perceived to influence the commitment of South African employees within the organisation, namely: Open communication, Leadership, Supervisory support, Opportunities for training and development, Compensation, Job security, Promotional opportunities, Shared values, Recognition and Trust. Certain issues were raised by the participants during the in-depth interviews, most notably the limited opportunities for training, development and promotion, as well as issues regarding the perceived limited compensation received from the organisation. Despite these issues, the general findings relating to the levels of commitment in the organisation were positive for the organisation under study, with the majority of the participants being perceived to demonstrate high levels of affective, normative and continuance commitment.
- Full Text:
Petrography, geochemistry and origin of atypical sedimentary-igneous contact relationships at the base of the Hotazel Formation around Middelplaats, Northern Cape Province, RSA
- Authors: Terracin, Matthew Theodore
- Date: 2014
- Subjects: Petrology -- South Africa , Geochemistry -- South Africa , Igneous rocks -- South Africa , Manganese ores -- South Africa , Manganese ores -- Geology -- South Africa , Metasomatism (Mineralogy) , Potassium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5059 , http://hdl.handle.net/10962/d1012985
- Description: In the Middelplaats mine area of the Kalahari manganese field, two drill holes (MP53 and MP54) intersected anomalously high-grade manganese ore sitting stratigraphically just above an igneous body (likely a dike or sill). Manganese ore located within approximate 5 meters of the contact with the underlying igneous rocks has been substantially metasomatically upgraded from 25 percent manganese, to over 40 percent whilst the dominant manganese species within the ore has been altered to hausmannite. This report demonstrates the metasomatic alteration is related to devolatilization (removal and/or remobilization of H₂O, CO₂ and CaO) due to contact metamorphism caused by the underlying igneous rocks. The Middelplaats mine is situated in the southwest corner of the Kalahari manganese field where the paleo basin shallows out and ends. Within the mine area, several stratigraphic units pinch out or are truncated by the side of the basin. This pinching out of lithological formations has led to the underlying Ongeluk Formation being in contact with the much younger units of the Hotazel Formation. Therefore, geochemical investigation into the nature and source of the igneous rocks was also undertaken to see if the rocks from the two drill holes were related to one another and/or the underlying Ongeluk Formation. Results of these geochemical studies have demonstrated that the Middelplaats igneous rocks (dolerites) from the two drill holes (MP53 and MP54) share a co-genetic source region. There is also reasonable geochemical evidence that the source region of the Middelplaats igneous rocks was substantially similar to the source region of the Ongeluk Formation. This may indicate that the source region of the Ongeluk Formation was reactivated at some later stage resulting in the emplacement of doleritic dikes or sills in the Middelplaats mine area. The Middelplaats igneous rocks were also found to have undergone a slight but pervasive potassic alteration; with most of the original plagioclase feldspar showing some level of replacement by a potassium enriched feldspar. Although no source for this potassic fluid was found, the devolatilization reaction within the manganese ore appears to have released some potassium into the surrounding rocks. This additional potassium may be responsible for some localized potassic alteration.
- Full Text:
- Authors: Terracin, Matthew Theodore
- Date: 2014
- Subjects: Petrology -- South Africa , Geochemistry -- South Africa , Igneous rocks -- South Africa , Manganese ores -- South Africa , Manganese ores -- Geology -- South Africa , Metasomatism (Mineralogy) , Potassium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5059 , http://hdl.handle.net/10962/d1012985
- Description: In the Middelplaats mine area of the Kalahari manganese field, two drill holes (MP53 and MP54) intersected anomalously high-grade manganese ore sitting stratigraphically just above an igneous body (likely a dike or sill). Manganese ore located within approximate 5 meters of the contact with the underlying igneous rocks has been substantially metasomatically upgraded from 25 percent manganese, to over 40 percent whilst the dominant manganese species within the ore has been altered to hausmannite. This report demonstrates the metasomatic alteration is related to devolatilization (removal and/or remobilization of H₂O, CO₂ and CaO) due to contact metamorphism caused by the underlying igneous rocks. The Middelplaats mine is situated in the southwest corner of the Kalahari manganese field where the paleo basin shallows out and ends. Within the mine area, several stratigraphic units pinch out or are truncated by the side of the basin. This pinching out of lithological formations has led to the underlying Ongeluk Formation being in contact with the much younger units of the Hotazel Formation. Therefore, geochemical investigation into the nature and source of the igneous rocks was also undertaken to see if the rocks from the two drill holes were related to one another and/or the underlying Ongeluk Formation. Results of these geochemical studies have demonstrated that the Middelplaats igneous rocks (dolerites) from the two drill holes (MP53 and MP54) share a co-genetic source region. There is also reasonable geochemical evidence that the source region of the Middelplaats igneous rocks was substantially similar to the source region of the Ongeluk Formation. This may indicate that the source region of the Ongeluk Formation was reactivated at some later stage resulting in the emplacement of doleritic dikes or sills in the Middelplaats mine area. The Middelplaats igneous rocks were also found to have undergone a slight but pervasive potassic alteration; with most of the original plagioclase feldspar showing some level of replacement by a potassium enriched feldspar. Although no source for this potassic fluid was found, the devolatilization reaction within the manganese ore appears to have released some potassium into the surrounding rocks. This additional potassium may be responsible for some localized potassic alteration.
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Petrological, mineralogical and geochemical studies of Zhongchang and Yantiangou ultramafic intrusions from the Panxi region, Sichuan Province, S-W China. Metallogenic and Exploration implications
- Authors: Malatji, Tsholofelo S
- Date: 2014
- Subjects: Mineralogy -- China , Geochemistry -- China
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5057 , http://hdl.handle.net/10962/d1012951
- Description: The Emeishan Large Igneous Province is one of the largest igneous provinces in the world. It is marked by basaltic extrusives that vary in Ti amount, classified as high Ti and low Ti. Several mafic to ultramafic intrusions occur in the province as well as granitic intrusions. The mafic-ultramafic intrusions are associated with mineralization; large layered utlramafic intrusions bearing Fe-Ti-V mineralization, while small dyke like or sill like intrusions contain Cu-Ni-PGE mineralization. The Zhongchang and Yantiangou mafic- ultramafic intrusions are small such intrusions bearing Ni-Cu-PGE mineralization. The deposits show a lot of similarities in source magma, evolution and mineralization. Parental magma for both deposits show alkaline tendencies, and a high Mg # indicative of primitive magma that underwent little crustal contamination. Mantle range Cu/Pd ratios show parental magma fertile in chalcophile elements and both deposits proceed to show depleted mantle normalized values as a result of sulphide saturation and subsequent mineralization. Mineralization in Zhongchang is hosted at the contact between peridotite and pyroxenite, interstitial to olivine and clinopyroxene. Alteration minerals include epidote and chlorite. High Cu/Pd ratios suggest earlier sulphide saturation and removal of a PGE sulphide, and a second sulphide saturation phase resulted in Ni-Cu mineralization. Mineralization in Yantiangou is hosted in biotite effectively following fractionation of olivine and clinopyroxene after which sulphide saturation occurred, precipitating sulphide minerals in biotite. Pyrite and millerite occur as a result of late stage hydrothermal alteration. Cu/Pd ratios are high indicating prior sulphide saturation occurred where PGE partitioned into sulphides. Ni/MgO ratios observed for both deposits indicate a state of sulphide under saturation where PGE partitioned into tellurides and bismurthinides and Ni into olivine. Average tenors for mineralized units are; Zhongchang at 5%Ni, 9% Cu, 4300ppb Pt and 2000ppb Pd, and Yantiangou having relatively lower tenors at 3.2%Ni, 6.5% Cu, 3000ppb Pt and 1300 ppb Pd.
- Full Text:
- Authors: Malatji, Tsholofelo S
- Date: 2014
- Subjects: Mineralogy -- China , Geochemistry -- China
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5057 , http://hdl.handle.net/10962/d1012951
- Description: The Emeishan Large Igneous Province is one of the largest igneous provinces in the world. It is marked by basaltic extrusives that vary in Ti amount, classified as high Ti and low Ti. Several mafic to ultramafic intrusions occur in the province as well as granitic intrusions. The mafic-ultramafic intrusions are associated with mineralization; large layered utlramafic intrusions bearing Fe-Ti-V mineralization, while small dyke like or sill like intrusions contain Cu-Ni-PGE mineralization. The Zhongchang and Yantiangou mafic- ultramafic intrusions are small such intrusions bearing Ni-Cu-PGE mineralization. The deposits show a lot of similarities in source magma, evolution and mineralization. Parental magma for both deposits show alkaline tendencies, and a high Mg # indicative of primitive magma that underwent little crustal contamination. Mantle range Cu/Pd ratios show parental magma fertile in chalcophile elements and both deposits proceed to show depleted mantle normalized values as a result of sulphide saturation and subsequent mineralization. Mineralization in Zhongchang is hosted at the contact between peridotite and pyroxenite, interstitial to olivine and clinopyroxene. Alteration minerals include epidote and chlorite. High Cu/Pd ratios suggest earlier sulphide saturation and removal of a PGE sulphide, and a second sulphide saturation phase resulted in Ni-Cu mineralization. Mineralization in Yantiangou is hosted in biotite effectively following fractionation of olivine and clinopyroxene after which sulphide saturation occurred, precipitating sulphide minerals in biotite. Pyrite and millerite occur as a result of late stage hydrothermal alteration. Cu/Pd ratios are high indicating prior sulphide saturation occurred where PGE partitioned into sulphides. Ni/MgO ratios observed for both deposits indicate a state of sulphide under saturation where PGE partitioned into tellurides and bismurthinides and Ni into olivine. Average tenors for mineralized units are; Zhongchang at 5%Ni, 9% Cu, 4300ppb Pt and 2000ppb Pd, and Yantiangou having relatively lower tenors at 3.2%Ni, 6.5% Cu, 3000ppb Pt and 1300 ppb Pd.
- Full Text:
Platinum share prices and the Marikana tragedy: an event study
- Authors: Sunga, Tapuwa Terence
- Date: 2014
- Subjects: Marikana (Rustenburg, South Africa) , Massacres -- South Africa -- Rustenburg , Stocks -- Prices -- South Africa , Stocks -- Prices -- Mathematical models
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1094 , http://hdl.handle.net/10962/d1013002
- Description: An event study is an economic tool of analysis that has begun to gain popularity in recent empirical literature. It is a technique that gives a researcher the opportunity to map out the reaction of a firm's stock to an event, usually making use of daily or monthly data. However, up to this point, event study methodology has generally been applied to more traditional phenomena capable of affecting equity value, such as dividend and macroeconomic policy announcements, and there have only been a few exceptions to this. This study looks at what impact the tragic shootings at Lonmin mine in Marikana on August 16th 2012 had on the share prices of platinum mining firms based in South Africa using event study methodology. It makes use of the technique to investigate how the share prices responded to the tragedy over a number of trading days, including the day of the shootings. To be best of our knowledge, no attempt has been made to analyse the impact on share prices using events of this nature. For the investigation, daily returns data was used for each firm. The abnormal returns and cumulative abnormal returns to each were then calculated and compared with their respective expected returns in order to determine whether investors in the shares of that particular firm reacted positively, negatively or not at all. The evidence found suggests that tragedies of this nature are capable of influencing share prices in the same manner as more traditional economic phenomena. Overall, only one firm was found to have been negatively affected by the shootings in a persistent manner, while the shares of the other firms examined reacted in a manner that was positive overall, but varied according to individual firm characteristics such as size. These finding conformed to our a priori expectations. In addition, the results also confirm the benefits of applying event study methodology to a wide variety of phenomena that fall outside the boundaries usually associated with business.
- Full Text:
- Authors: Sunga, Tapuwa Terence
- Date: 2014
- Subjects: Marikana (Rustenburg, South Africa) , Massacres -- South Africa -- Rustenburg , Stocks -- Prices -- South Africa , Stocks -- Prices -- Mathematical models
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1094 , http://hdl.handle.net/10962/d1013002
- Description: An event study is an economic tool of analysis that has begun to gain popularity in recent empirical literature. It is a technique that gives a researcher the opportunity to map out the reaction of a firm's stock to an event, usually making use of daily or monthly data. However, up to this point, event study methodology has generally been applied to more traditional phenomena capable of affecting equity value, such as dividend and macroeconomic policy announcements, and there have only been a few exceptions to this. This study looks at what impact the tragic shootings at Lonmin mine in Marikana on August 16th 2012 had on the share prices of platinum mining firms based in South Africa using event study methodology. It makes use of the technique to investigate how the share prices responded to the tragedy over a number of trading days, including the day of the shootings. To be best of our knowledge, no attempt has been made to analyse the impact on share prices using events of this nature. For the investigation, daily returns data was used for each firm. The abnormal returns and cumulative abnormal returns to each were then calculated and compared with their respective expected returns in order to determine whether investors in the shares of that particular firm reacted positively, negatively or not at all. The evidence found suggests that tragedies of this nature are capable of influencing share prices in the same manner as more traditional economic phenomena. Overall, only one firm was found to have been negatively affected by the shootings in a persistent manner, while the shares of the other firms examined reacted in a manner that was positive overall, but varied according to individual firm characteristics such as size. These finding conformed to our a priori expectations. In addition, the results also confirm the benefits of applying event study methodology to a wide variety of phenomena that fall outside the boundaries usually associated with business.
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Political grey : areas of ambiguity and contradiction
- Authors: Koekemoer, Carmen
- Date: 2014
- Subjects: Politics in art , Art -- Political aspects -- South Africa , Leadership in art , Portraits, African , Portraits, European , Art and revolutions -- South Africa
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2492 , http://hdl.handle.net/10962/d1013136
- Description: This Master of Fine Arts submission, consisting of a thesis titled ‘Political Grey: Areas of Ambiguity and Contradiction’ accompanied by an exhibition titled ‘Positions’, encompasses the concept of leadership while uncovering and expressing its ‘grey areas’ in a contemporary and undefined moment in South Africa. The concept of leadership has been complicated throughout the thesis in terms of how it is conceptualised in a traditional royal African art context as well as how Leader-Figures have been and are portrayed in both Western and African portrait genres. The notion that the new is built upon the old is continued throughout my thesis and is evident in the accompanying body of work. This notion is expressed on a number of levels: by the re-contextualisation of the print medium; the creative processes described as ‘postproduction’ which I use in my work; as well as that which is described as a ‘post-transitional’ moment. The recent political history of the country is considered, with reference made to the anti-apartheid movement and resistance art produced. Printmaking, viewed as an archetypal medium for resistance, is discussed, with reference made to its socio-political role during the 1980s as well as to the extent to which it continues to be used by contemporary artists in a different realm of conflict and change. This is demonstrated by the shift from the medium as a tool for protest to the medium as an instrument of political irony and pointed commentary.
- Full Text:
- Authors: Koekemoer, Carmen
- Date: 2014
- Subjects: Politics in art , Art -- Political aspects -- South Africa , Leadership in art , Portraits, African , Portraits, European , Art and revolutions -- South Africa
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2492 , http://hdl.handle.net/10962/d1013136
- Description: This Master of Fine Arts submission, consisting of a thesis titled ‘Political Grey: Areas of Ambiguity and Contradiction’ accompanied by an exhibition titled ‘Positions’, encompasses the concept of leadership while uncovering and expressing its ‘grey areas’ in a contemporary and undefined moment in South Africa. The concept of leadership has been complicated throughout the thesis in terms of how it is conceptualised in a traditional royal African art context as well as how Leader-Figures have been and are portrayed in both Western and African portrait genres. The notion that the new is built upon the old is continued throughout my thesis and is evident in the accompanying body of work. This notion is expressed on a number of levels: by the re-contextualisation of the print medium; the creative processes described as ‘postproduction’ which I use in my work; as well as that which is described as a ‘post-transitional’ moment. The recent political history of the country is considered, with reference made to the anti-apartheid movement and resistance art produced. Printmaking, viewed as an archetypal medium for resistance, is discussed, with reference made to its socio-political role during the 1980s as well as to the extent to which it continues to be used by contemporary artists in a different realm of conflict and change. This is demonstrated by the shift from the medium as a tool for protest to the medium as an instrument of political irony and pointed commentary.
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Political party institutionalization : a case study of Kenya
- Mutizwa-Mangiza, Shingai Price
- Authors: Mutizwa-Mangiza, Shingai Price
- Date: 2014
- Subjects: Kenya -- Politics and government , Political parties -- Kenya , Kenya -- History , Kenya -- Colonial influence
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2881 , http://hdl.handle.net/10962/d1013258
- Description: This thesis explores the nature and extent of political party institutionalization in Kenya. More specifically, it focuses on the four dimensions of party institutionalization, namely organizational systemness, value-infusion, decisional autonomy and reification. The study itself is largely located within the historical-institutionalist school of thought, with particular emphasis on the path dependency strand of this theoretical framework. However, the study also employs a political economy approach. It recognizes that the development trajectory of party politics in Kenya did not evolve in a vacuum but within a particular historical-institutional and political-economic context. The thesis advances the notion that those current low levels of party institutionalization that are evident in almost all parties, and the relatively peripheral role that they have in Kenya's governance can be traced to Kenya's colonial and post-colonial political history, the resource poor environment and the onset of globalization.
- Full Text:
- Authors: Mutizwa-Mangiza, Shingai Price
- Date: 2014
- Subjects: Kenya -- Politics and government , Political parties -- Kenya , Kenya -- History , Kenya -- Colonial influence
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2881 , http://hdl.handle.net/10962/d1013258
- Description: This thesis explores the nature and extent of political party institutionalization in Kenya. More specifically, it focuses on the four dimensions of party institutionalization, namely organizational systemness, value-infusion, decisional autonomy and reification. The study itself is largely located within the historical-institutionalist school of thought, with particular emphasis on the path dependency strand of this theoretical framework. However, the study also employs a political economy approach. It recognizes that the development trajectory of party politics in Kenya did not evolve in a vacuum but within a particular historical-institutional and political-economic context. The thesis advances the notion that those current low levels of party institutionalization that are evident in almost all parties, and the relatively peripheral role that they have in Kenya's governance can be traced to Kenya's colonial and post-colonial political history, the resource poor environment and the onset of globalization.
- Full Text:
Predation by alien largemouth bass, Micropterus salmoides Lacepéde 1802 (Centrarchidae: Perciformes), on indigenous marine fish species in the Kowie System, South Africa
- Authors: Magoro, Mandla Leon
- Date: 2014
- Subjects: Largemouth bass -- South Africa -- Port Alfred , Largemouth bass -- Food -- South Africa -- Port Alfred , Estuarine fishes -- South Africa -- Port Alfred , Estuarine fishes -- Predators of , Centrarchidae , Fishes -- Effect of human beings on
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5851 , http://hdl.handle.net/10962/d1011939 , Largemouth bass -- South Africa -- Port Alfred , Largemouth bass -- Food -- South Africa -- Port Alfred , Estuarine fishes -- South Africa -- Port Alfred , Estuarine fishes -- Predators of , Centrarchidae , Fishes -- Effect of human beings on
- Description: Estuaries serve as nursery areas for a large number of estuary-associated fish species. Some of these taxa also use river catchments as nursery areas. During the upstream migration of this latter group, the juveniles are prone to predation by native and alien predatory fish inhabiting the system. The rate of invasion of ecosystems by alien organisms can be directly linked to anthropogenic influences, including both intentional and unintentional introductions by alien organisms into new regions. The largemouth bass, Micropterus salmoides, is a facultative piscivorous fish that has been successfully introduced worldwide for the main purpose of sport fishing. Where introduced, it has been found to negatively impact native fish and invertebrate species through predation, competitive exclusion and displacement of indigenous fish species. The aim of this thesis was to investigate the predatory impact of largemouth bass on the estuary-associated Cape moony Monodactylus falciformis, Cape stumpnose Rhabdosargus holubi and freshwater mullet Myxus capensis in the lower Kowie River of the Eastern Cape Province, South Africa. A combination of approaches was employed during this study. Stomach contents, stable isotopes and fatty acid analyses were employed for the reconstruction of the diet of largemouth bass. Acoustic telemetry was used to elucidate largemouth bass movements, particularly their ability to enter the upper reaches of the Kowie Estuary. Stomach contents and stable isotopes analyses showed that M. salmoides exhibit an ontogenic shift in diet, with small and medium sized individuals consuming the higher proportion of fish prey, while large sized individuals mostly consumed invertebrates such as crabs (Potamonautes sidneyi) and Odonata larvae, while consuming only a small proportion of estuary-associated fish. Fatty acid analysis only showed a direct connection between the fatty acid profiles of largemouth bass and those of M. capensis and M. falciformis. The acoustic telemetry results indicated that some M. salmoides individuals periodically move into the upper reaches of the estuary following river flood events. The results obtained from all these approaches highlight the risk posed by largemouth bass introductions on indigenous fish species, particularly those that enter the areas occupied by these top predators.
- Full Text:
- Authors: Magoro, Mandla Leon
- Date: 2014
- Subjects: Largemouth bass -- South Africa -- Port Alfred , Largemouth bass -- Food -- South Africa -- Port Alfred , Estuarine fishes -- South Africa -- Port Alfred , Estuarine fishes -- Predators of , Centrarchidae , Fishes -- Effect of human beings on
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5851 , http://hdl.handle.net/10962/d1011939 , Largemouth bass -- South Africa -- Port Alfred , Largemouth bass -- Food -- South Africa -- Port Alfred , Estuarine fishes -- South Africa -- Port Alfred , Estuarine fishes -- Predators of , Centrarchidae , Fishes -- Effect of human beings on
- Description: Estuaries serve as nursery areas for a large number of estuary-associated fish species. Some of these taxa also use river catchments as nursery areas. During the upstream migration of this latter group, the juveniles are prone to predation by native and alien predatory fish inhabiting the system. The rate of invasion of ecosystems by alien organisms can be directly linked to anthropogenic influences, including both intentional and unintentional introductions by alien organisms into new regions. The largemouth bass, Micropterus salmoides, is a facultative piscivorous fish that has been successfully introduced worldwide for the main purpose of sport fishing. Where introduced, it has been found to negatively impact native fish and invertebrate species through predation, competitive exclusion and displacement of indigenous fish species. The aim of this thesis was to investigate the predatory impact of largemouth bass on the estuary-associated Cape moony Monodactylus falciformis, Cape stumpnose Rhabdosargus holubi and freshwater mullet Myxus capensis in the lower Kowie River of the Eastern Cape Province, South Africa. A combination of approaches was employed during this study. Stomach contents, stable isotopes and fatty acid analyses were employed for the reconstruction of the diet of largemouth bass. Acoustic telemetry was used to elucidate largemouth bass movements, particularly their ability to enter the upper reaches of the Kowie Estuary. Stomach contents and stable isotopes analyses showed that M. salmoides exhibit an ontogenic shift in diet, with small and medium sized individuals consuming the higher proportion of fish prey, while large sized individuals mostly consumed invertebrates such as crabs (Potamonautes sidneyi) and Odonata larvae, while consuming only a small proportion of estuary-associated fish. Fatty acid analysis only showed a direct connection between the fatty acid profiles of largemouth bass and those of M. capensis and M. falciformis. The acoustic telemetry results indicated that some M. salmoides individuals periodically move into the upper reaches of the estuary following river flood events. The results obtained from all these approaches highlight the risk posed by largemouth bass introductions on indigenous fish species, particularly those that enter the areas occupied by these top predators.
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Prioritising native fish populations for conservation using genetics in the Groot Marico catchment, North West Province, South Africa
- Authors: Van der Walt, Kerry-Ann
- Date: 2014
- Subjects: Native fishes Fishery management -- South Africa -- North West Fish populations Fishes -- Conservation -- South Africa -- Western Cape
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/69102 , vital:29390
- Description: The Groot Marico catchment in the North West Province is a National Freshwater Ecosystem Priority Area (NFEPA) because it represents unique landscape features with unique biodiversity that are considered to be of special ecological significance. Three native freshwater species Amphilius uranoscopus, Chiloglanis pretoriae and Barbus motebensis, have high local conservation importance and B. motebensis is endemic to the catchment and is IUCN-listed as vulnerable. The main objective of this study is to contribute towards the effective conservation of these three species in the Groot Marico River system by assessing their genetic structure to determine whether tributary populations of the three species comprise of one genetic population or whether they are divided into genetically distinct subpopulations, in order to prioritise areas for conservation. The central null hypothesis was that there is no genetic differentiation between tributary populations (i.e., panmixia) of B. motebensis, A. uranoscopus and C. pretoriae in the Groot Marico catchment, North West Province. In total, 80 individuals per species were collected, targeting at least 10 individuals per population from a total of eight populations (seven tributaries and the Groot Marico main stem) and across the study area. Samples were collected by electrofishing and specimens were euthanized using an overdose of clove oil. A sample of muscle tissue was removed for genetic evaluation and the remainder of the specimens served as voucher specimens. For the genetic evaluation, mitochondrial (ND2, cyt b) and nuclear (S7) genes were used. Genetic techniques used were DNA extraction, polymerase chain reaction (PCR), purification and sequencing. From the 240 individuals collected, 123 sequences for B. motebensis, 111 sequences for A. uranoscopus and 103 sequences for C. pretoriae were analysed across all three genes. Statistical analysis included looking at cleaned sequences in order to obtain models using MODELTEST (version 3.06). Population structuring and phylogeographic analysis was performed in Arlequin (version 2000), TCS (version 1.2.1) and PAUP*. Results indicated that for B. motebensis the null hypothesis could be rejected as there were two distinct lineages (the Draai and Eastern lineages) that demonstrated significant divergence in both the ND2 and S7 genes, suggesting historical isolation. The low divergence in the mitochondrial cytochrome b gene (0% < D < 0.8%) suggests that this isolation is not very old and is probably not comparable to species level differentiation. The null hypothesis was also rejected for A. uranoscopus as there were also significant levels of differentiation between tributary populations resulting in the identification of two lineages (the Ribbok and Western lineages). However, for C. pretoriae, the null hypothesis could not be rejected as there was no genetic differentiation between tributary populations i.e., one panmictic population. Therefore, due to each species showing different genetic structuring within the tributary populations, more than one priority area for conservation needs to be implemented. These priority areas of conservation where therefore evaluated based on the current conservation status of the species (B. motebensis being vulnerable on the IUCN Red List), the number of Evolutionary Significant Units for each species and the overall genetic diversity of all three species in the Groot Marico catchment. In total, four tributary populations were conservation priorities areas, these were the Draai, Vanstraatens, Ribbok and Kaaloog tributaries. The Draai, Vanstraatens and Kaaloog tributaries were selected as priority areas for B. motebensis (B. motebensis is considered to be the most vulnerable of all three species). The Draai tributary was selected due to the B. motebensis population within the tributary showing isolation from the rest of the tributary populations. In order to conserve B. motebensis from the Southern lineage, the Vanstraatens and Kaaloog tributaries were selected. Reasons for selecting these two specific tributaries within the Southern lineage were that the Vanstraatens tributary had unique alleles (three Evolutionary Significant Units) for B. motebensis and the Kaaloog tributary had high genetic diversity (HD = 0.889, ND2 gene) when compared to the other tributary populations. The Ribbok and Vanstraatens tributaries were selected as priority areas for the conservation of A. uranoscopus. The Ribbok tributary was selected as it showed isolation from the rest of the tributary populations, as seen with the Draai tributary (B. motebensis) and the Vanstraatens tributary was selected to represent the Western lineage as it had the highest diversity for both genes (ND2 and S7). The Ribbok tributary has the highest prioritisation when compared to the Vanstraatens tributary. Chiloglanis pretoriae occurs within the Draai, Vanstraatens, Ribbok and Kaaloog tributaries, therefore by prioritising these tributaries for conservation, C. pretoriae will in turn be conserved.
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- Authors: Van der Walt, Kerry-Ann
- Date: 2014
- Subjects: Native fishes Fishery management -- South Africa -- North West Fish populations Fishes -- Conservation -- South Africa -- Western Cape
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/69102 , vital:29390
- Description: The Groot Marico catchment in the North West Province is a National Freshwater Ecosystem Priority Area (NFEPA) because it represents unique landscape features with unique biodiversity that are considered to be of special ecological significance. Three native freshwater species Amphilius uranoscopus, Chiloglanis pretoriae and Barbus motebensis, have high local conservation importance and B. motebensis is endemic to the catchment and is IUCN-listed as vulnerable. The main objective of this study is to contribute towards the effective conservation of these three species in the Groot Marico River system by assessing their genetic structure to determine whether tributary populations of the three species comprise of one genetic population or whether they are divided into genetically distinct subpopulations, in order to prioritise areas for conservation. The central null hypothesis was that there is no genetic differentiation between tributary populations (i.e., panmixia) of B. motebensis, A. uranoscopus and C. pretoriae in the Groot Marico catchment, North West Province. In total, 80 individuals per species were collected, targeting at least 10 individuals per population from a total of eight populations (seven tributaries and the Groot Marico main stem) and across the study area. Samples were collected by electrofishing and specimens were euthanized using an overdose of clove oil. A sample of muscle tissue was removed for genetic evaluation and the remainder of the specimens served as voucher specimens. For the genetic evaluation, mitochondrial (ND2, cyt b) and nuclear (S7) genes were used. Genetic techniques used were DNA extraction, polymerase chain reaction (PCR), purification and sequencing. From the 240 individuals collected, 123 sequences for B. motebensis, 111 sequences for A. uranoscopus and 103 sequences for C. pretoriae were analysed across all three genes. Statistical analysis included looking at cleaned sequences in order to obtain models using MODELTEST (version 3.06). Population structuring and phylogeographic analysis was performed in Arlequin (version 2000), TCS (version 1.2.1) and PAUP*. Results indicated that for B. motebensis the null hypothesis could be rejected as there were two distinct lineages (the Draai and Eastern lineages) that demonstrated significant divergence in both the ND2 and S7 genes, suggesting historical isolation. The low divergence in the mitochondrial cytochrome b gene (0% < D < 0.8%) suggests that this isolation is not very old and is probably not comparable to species level differentiation. The null hypothesis was also rejected for A. uranoscopus as there were also significant levels of differentiation between tributary populations resulting in the identification of two lineages (the Ribbok and Western lineages). However, for C. pretoriae, the null hypothesis could not be rejected as there was no genetic differentiation between tributary populations i.e., one panmictic population. Therefore, due to each species showing different genetic structuring within the tributary populations, more than one priority area for conservation needs to be implemented. These priority areas of conservation where therefore evaluated based on the current conservation status of the species (B. motebensis being vulnerable on the IUCN Red List), the number of Evolutionary Significant Units for each species and the overall genetic diversity of all three species in the Groot Marico catchment. In total, four tributary populations were conservation priorities areas, these were the Draai, Vanstraatens, Ribbok and Kaaloog tributaries. The Draai, Vanstraatens and Kaaloog tributaries were selected as priority areas for B. motebensis (B. motebensis is considered to be the most vulnerable of all three species). The Draai tributary was selected due to the B. motebensis population within the tributary showing isolation from the rest of the tributary populations. In order to conserve B. motebensis from the Southern lineage, the Vanstraatens and Kaaloog tributaries were selected. Reasons for selecting these two specific tributaries within the Southern lineage were that the Vanstraatens tributary had unique alleles (three Evolutionary Significant Units) for B. motebensis and the Kaaloog tributary had high genetic diversity (HD = 0.889, ND2 gene) when compared to the other tributary populations. The Ribbok and Vanstraatens tributaries were selected as priority areas for the conservation of A. uranoscopus. The Ribbok tributary was selected as it showed isolation from the rest of the tributary populations, as seen with the Draai tributary (B. motebensis) and the Vanstraatens tributary was selected to represent the Western lineage as it had the highest diversity for both genes (ND2 and S7). The Ribbok tributary has the highest prioritisation when compared to the Vanstraatens tributary. Chiloglanis pretoriae occurs within the Draai, Vanstraatens, Ribbok and Kaaloog tributaries, therefore by prioritising these tributaries for conservation, C. pretoriae will in turn be conserved.
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Prolegomena to ubuntu and any other future South African philosophy
- Authors: Prinsloo, Aidan Vivian
- Date: 2014
- Subjects: Ubuntu (Philosophy) , Political science -- Philosophy , Philosophy, African , Social values -- South Africa , Social values -- South Africa -- Philosophy , Place (Philosophy)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2747 , http://hdl.handle.net/10962/d1013092
- Description: In this thesis I consider ubuntu as a metonym for the particularly African features of South African philosophy. Given that Mbembe critiques African philosophy in general as having failed because it has been subsumed under two unreflective political movements in African thought, I consider whether or not the concept of ubuntu escapes his critique. After developing criteria for measuring the success of any philosophical concept, I conclude that ubuntu is unsuccessful. I then identify the political constraints placed on ubuntu that lead to its failure. These constraints arise from having to validate Africa as a place of intellectual worth. Considering the role of place in these constraints, I argue that a far more productive approach to ubuntu (and South African philosophy in general) is to explicitly incorporate this place into our philosophical project. I use the conceptual framework developed by Bruce Janz to provide a systematic account of place that can be used in formulating South African philosophy. I add to Janz, arguing that philosophy is a response to a particular feature of place: the mystery. By incorporating place into ubuntu, I am able to start developing a philosophical concept which can fulfil the political constraints placed on ubuntu without sacrificing its philosophical integrity. I suggest that ubuntu remains an interesting concept primarily because it promises to respond to the fragmentation of the South African place. I conclude by arguing that ubuntu should be used as the basis for a civic religion which responds to the fragmentation of the South African place. This civic religion will give rise to a significantly distinct philosophical tradition which should not succumb to Mbembe’s critique.
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- Authors: Prinsloo, Aidan Vivian
- Date: 2014
- Subjects: Ubuntu (Philosophy) , Political science -- Philosophy , Philosophy, African , Social values -- South Africa , Social values -- South Africa -- Philosophy , Place (Philosophy)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2747 , http://hdl.handle.net/10962/d1013092
- Description: In this thesis I consider ubuntu as a metonym for the particularly African features of South African philosophy. Given that Mbembe critiques African philosophy in general as having failed because it has been subsumed under two unreflective political movements in African thought, I consider whether or not the concept of ubuntu escapes his critique. After developing criteria for measuring the success of any philosophical concept, I conclude that ubuntu is unsuccessful. I then identify the political constraints placed on ubuntu that lead to its failure. These constraints arise from having to validate Africa as a place of intellectual worth. Considering the role of place in these constraints, I argue that a far more productive approach to ubuntu (and South African philosophy in general) is to explicitly incorporate this place into our philosophical project. I use the conceptual framework developed by Bruce Janz to provide a systematic account of place that can be used in formulating South African philosophy. I add to Janz, arguing that philosophy is a response to a particular feature of place: the mystery. By incorporating place into ubuntu, I am able to start developing a philosophical concept which can fulfil the political constraints placed on ubuntu without sacrificing its philosophical integrity. I suggest that ubuntu remains an interesting concept primarily because it promises to respond to the fragmentation of the South African place. I conclude by arguing that ubuntu should be used as the basis for a civic religion which responds to the fragmentation of the South African place. This civic religion will give rise to a significantly distinct philosophical tradition which should not succumb to Mbembe’s critique.
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Psychiatric in-patients’ experiences of an art group : with a focus on the self
- Authors: Holtzhausen, Minnon
- Date: 2014
- Subjects: Art therapy -- Case studies , Group psychotherapy -- Case studies , Cognitive therapy -- Case studies , Self-actualization (Psychology) , Self-perception , Mental illness -- Treatment , Psychotherapy patients -- Treatment
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3232 , http://hdl.handle.net/10962/d1013146
- Description: Aims: It is argued that one’s sense of self is threatened and eroded by mental illness. According to the narrative perspective, one’s personal life narrative is displaced and maintained by a story of illness. However, dialogical self theorists argue that mental illness limits the number of ‘I’ positions available within an individual, resulting in the positions/voices becoming rigid and being dominated by a singular, monological position. The aims of this qualitative study are to attempt to understand and examine psychiatric inpatients’ personal lived experiences of an art group. The goal of the study is to focus on the impact of the art-making process on these patients with regards to the construction of their sense of self. Design: A qualitative research design was used in the study. Method: Four psychiatric in-patient art group members – three male and one female, between the ages of 27 and 40 – were interviewed. A semi-structured interview schedule consisting of sixteen questions focusing on the interviewees’ experiences of the art group was used. The interviews were analysed using an interpretive phenomenological analysis. Results: Three superordinate themes emerged: What the Participants Gained From the Art Group, Sense of Community and Leaving a Mark, and The Experience of Self in the Art group. All three Superordinate themes fall within the participants’ experience of the art group. Conclusion: All four of the participants expressed positive feelings and enjoyment towards the art group. Participation in the art group provided the participants with a sense of pride, achievement and hope within their lives. As a result of participation on the art group, one of the four participants was able to construct a thin alternative experience and sense of self.
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- Authors: Holtzhausen, Minnon
- Date: 2014
- Subjects: Art therapy -- Case studies , Group psychotherapy -- Case studies , Cognitive therapy -- Case studies , Self-actualization (Psychology) , Self-perception , Mental illness -- Treatment , Psychotherapy patients -- Treatment
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3232 , http://hdl.handle.net/10962/d1013146
- Description: Aims: It is argued that one’s sense of self is threatened and eroded by mental illness. According to the narrative perspective, one’s personal life narrative is displaced and maintained by a story of illness. However, dialogical self theorists argue that mental illness limits the number of ‘I’ positions available within an individual, resulting in the positions/voices becoming rigid and being dominated by a singular, monological position. The aims of this qualitative study are to attempt to understand and examine psychiatric inpatients’ personal lived experiences of an art group. The goal of the study is to focus on the impact of the art-making process on these patients with regards to the construction of their sense of self. Design: A qualitative research design was used in the study. Method: Four psychiatric in-patient art group members – three male and one female, between the ages of 27 and 40 – were interviewed. A semi-structured interview schedule consisting of sixteen questions focusing on the interviewees’ experiences of the art group was used. The interviews were analysed using an interpretive phenomenological analysis. Results: Three superordinate themes emerged: What the Participants Gained From the Art Group, Sense of Community and Leaving a Mark, and The Experience of Self in the Art group. All three Superordinate themes fall within the participants’ experience of the art group. Conclusion: All four of the participants expressed positive feelings and enjoyment towards the art group. Participation in the art group provided the participants with a sense of pride, achievement and hope within their lives. As a result of participation on the art group, one of the four participants was able to construct a thin alternative experience and sense of self.
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Purification and characterization of TbHsp70.c, a novel Hsp70 from Trypanosoma brucei
- Authors: Burger, Adélle
- Date: 2014
- Subjects: African trypanosomiasis -- Research Heat shock proteins -- Research Trypanosoma brucei -- Research Mycobacterial diseases -- Research -- Africa Parasitic diseases -- Africa -- Prevention Parasites -- Physiology Developing countries -- Economic conditions
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4105 , http://hdl.handle.net/10962/d1011618
- Description: One of Africa’s neglected tropical diseases, African Trypanosomiasis, is not only fatal but also has a crippling impact on economic development. Heat shock proteins play a wide range of roles in the cell and they are required to assist the parasite as it moves from a cold blooded insect vector to a warm blooded mammalian host. The expression of heat shock proteins increases during these heat shock conditions, and this is considered to play a role in differentiation of these vector-borne parasites. Heat shock protein 70 (Hsp70) is an important molecular chaperone that is involved in protein homeostasis, Hsp40 acts as a co-chaperone and stimulates its intrinsically weak ATPase activity. In silico analysis of the T. brucei genome has revealed the existence of 12 Hsp70 proteins and 65 Hsp40 proteins to date. A novel Hsp70, TbHsp70.c, was recently identified in T. brucei. Different from the prototypical Hsp70, TbHsp70.c contains an acidic substrate binding domain and lacks the C-terminal EEVD motif. By implication the substrate range and mechanism by which the substrates are recognized may be novel. The ability of a Type I Hsp40, Tbj2, to function as a co-chaperone of TbHsp70.c was investigated. The main objective of this study was to biochemically characterize TbHsp70.c and its partnership with Tbj2 to further enhance our knowledge of parasite biology. TbHsp70.c and Tbj2 were heterologously expressed and purified and both proteins displayed chaperone activities in their ability to suppress aggregation of thermolabile MDH. TbHsp70.c also suppressed aggregation of rhodanese. ATPase assays revealed that the ATPase activity of TbHsp70.c was stimulated by Tbj2. The targeted inhibition of the function of heat shock proteins is emerging as a tool to combat disease. The small molecule modulators quercetin and methylene blue are known to inhibit the ATPase activity of Hsp70. However, methylene blue did not significantly inhibit the ATPase activity of TbHsp70.c; while quercetin, did inhibit the ATPase activity. In vivo heat stress experiments indicated an up-regulation of the expression levels of TbHsp70.c. RNA interference studies showed partial knockdown of TbHsp70.c with no detrimental effect on the parasite. Fluorescence microscopy studies of TbHsp70.c showed a probable cytoplasmic subcellular localization. In this study both TbHsp70.c and Tbj2 demonstrated chaperone activity and Tbj2 possibly functions as a co-chaperone of TbHsp70.c.
- Full Text:
- Authors: Burger, Adélle
- Date: 2014
- Subjects: African trypanosomiasis -- Research Heat shock proteins -- Research Trypanosoma brucei -- Research Mycobacterial diseases -- Research -- Africa Parasitic diseases -- Africa -- Prevention Parasites -- Physiology Developing countries -- Economic conditions
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4105 , http://hdl.handle.net/10962/d1011618
- Description: One of Africa’s neglected tropical diseases, African Trypanosomiasis, is not only fatal but also has a crippling impact on economic development. Heat shock proteins play a wide range of roles in the cell and they are required to assist the parasite as it moves from a cold blooded insect vector to a warm blooded mammalian host. The expression of heat shock proteins increases during these heat shock conditions, and this is considered to play a role in differentiation of these vector-borne parasites. Heat shock protein 70 (Hsp70) is an important molecular chaperone that is involved in protein homeostasis, Hsp40 acts as a co-chaperone and stimulates its intrinsically weak ATPase activity. In silico analysis of the T. brucei genome has revealed the existence of 12 Hsp70 proteins and 65 Hsp40 proteins to date. A novel Hsp70, TbHsp70.c, was recently identified in T. brucei. Different from the prototypical Hsp70, TbHsp70.c contains an acidic substrate binding domain and lacks the C-terminal EEVD motif. By implication the substrate range and mechanism by which the substrates are recognized may be novel. The ability of a Type I Hsp40, Tbj2, to function as a co-chaperone of TbHsp70.c was investigated. The main objective of this study was to biochemically characterize TbHsp70.c and its partnership with Tbj2 to further enhance our knowledge of parasite biology. TbHsp70.c and Tbj2 were heterologously expressed and purified and both proteins displayed chaperone activities in their ability to suppress aggregation of thermolabile MDH. TbHsp70.c also suppressed aggregation of rhodanese. ATPase assays revealed that the ATPase activity of TbHsp70.c was stimulated by Tbj2. The targeted inhibition of the function of heat shock proteins is emerging as a tool to combat disease. The small molecule modulators quercetin and methylene blue are known to inhibit the ATPase activity of Hsp70. However, methylene blue did not significantly inhibit the ATPase activity of TbHsp70.c; while quercetin, did inhibit the ATPase activity. In vivo heat stress experiments indicated an up-regulation of the expression levels of TbHsp70.c. RNA interference studies showed partial knockdown of TbHsp70.c with no detrimental effect on the parasite. Fluorescence microscopy studies of TbHsp70.c showed a probable cytoplasmic subcellular localization. In this study both TbHsp70.c and Tbj2 demonstrated chaperone activity and Tbj2 possibly functions as a co-chaperone of TbHsp70.c.
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Raising student teachers’awareness around issues of professional conduct : an action research project
- Authors: Chishimba, Felix Nkalamo
- Date: 2014
- Subjects: Teachers -- Training of , Teachers -- Professional ethics , Teachers -- Professional relationships
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2012 , http://hdl.handle.net/10962/d1016338
- Description: The teaching profession, like many other professions, has rules and regulations that guide the conduct of its members. Teachers and those who aspire to take up teaching are expected to conduct themselves and discharge their duties in an impeccably professional manner. However, there is concern especially among education authorities regarding unprofessional conduct of some of those employed in schools and colleges. This action research study is a response to this concern. Its goal was to explore issues of professional conduct as part of the induction process of new members entering the teaching profession, and to thereby develop a better understanding of how best to raise student teachers’ awareness around professional conduct issues. The study used a qualitative research framework located in the interpretive paradigm. Three theoretical frameworks informed the design and subsequent analysis of the findings, namely, Burn’s transformational leadership, Mezirow’s transformative learning and Kolb’s theory of experiential learning. Two cycles of workshops around issues of professional conduct were conducted over a period of four weeks with a sample of 40 pre-service student teachers: final year students enrolled in the college’s three year Diploma in Education programme, all members of a science education class. Data collection strategies used were semi-structured interviews, observation and the use of reflective journals, among others. Analysis of the data involved identification of emerging themes and patterns. Initial findings indicate that prior to the commencement of the cycles of action research, participants appeared to have a limited understanding around issues of professional conduct, but that this changed as they participated in the workshops. The data of the study suggest that further steps need to be taken to establish optimal ways of incorporating professional conduct issues into the college’s teaching curriculum.
- Full Text:
- Authors: Chishimba, Felix Nkalamo
- Date: 2014
- Subjects: Teachers -- Training of , Teachers -- Professional ethics , Teachers -- Professional relationships
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2012 , http://hdl.handle.net/10962/d1016338
- Description: The teaching profession, like many other professions, has rules and regulations that guide the conduct of its members. Teachers and those who aspire to take up teaching are expected to conduct themselves and discharge their duties in an impeccably professional manner. However, there is concern especially among education authorities regarding unprofessional conduct of some of those employed in schools and colleges. This action research study is a response to this concern. Its goal was to explore issues of professional conduct as part of the induction process of new members entering the teaching profession, and to thereby develop a better understanding of how best to raise student teachers’ awareness around professional conduct issues. The study used a qualitative research framework located in the interpretive paradigm. Three theoretical frameworks informed the design and subsequent analysis of the findings, namely, Burn’s transformational leadership, Mezirow’s transformative learning and Kolb’s theory of experiential learning. Two cycles of workshops around issues of professional conduct were conducted over a period of four weeks with a sample of 40 pre-service student teachers: final year students enrolled in the college’s three year Diploma in Education programme, all members of a science education class. Data collection strategies used were semi-structured interviews, observation and the use of reflective journals, among others. Analysis of the data involved identification of emerging themes and patterns. Initial findings indicate that prior to the commencement of the cycles of action research, participants appeared to have a limited understanding around issues of professional conduct, but that this changed as they participated in the workshops. The data of the study suggest that further steps need to be taken to establish optimal ways of incorporating professional conduct issues into the college’s teaching curriculum.
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Reading clubs as a literacy intervention tool to develop English vocabulary amongst Grade 3 English second language learners at a school in Grahamstown, Eastern Cape
- Authors: Tshuma, Sibhekinkosi Anna
- Date: 2014
- Subjects: Literacy programs -- South Africa -- Grahamstown Group reading -- South Africa -- Grahamstown Children -- Books and reading -- South Africa -- Grahamstown Books and reading -- Social aspects -- South Africa -- Grahamstown Second language acquisition Action research Social interaction -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1965 , http://hdl.handle.net/10962/d1011755
- Description: This study is part of a larger research programme that seeks to contribute towards an understanding of South Africa's complex literacy landscape and formulate strategies that may address these particularly in the Foundation Phase. It is a case study of one public primary school in Grahamstown where isiXhosa is used as a medium of instruction until Grade 3, after which the medium of instruction changes to English. This transition is not helped by the little reading that happens in the language at the FP. The learners under study are Grade 3 isiXhosa first language speakers, learning English as a First Additional Language (FAL) with limited exposure to the language. Through a qualitative participatory action research process, the study investigated the extent to which a reading club in general and a responsive reading programme in particular, might develop learners' English vocabulary at this particular school. The value of reading clubs as a vehicle for second language learning as well as the importance of considering learner needs in the development of the reading programme are key contributions this study makes. The study draws on social constructivism as a theoretical framework based on the principle that learning is a social acitvity. Vygotsky (1978) states that language learning (LL) takes place through interactions in meaningful events, rather that through isolated language activities. The process is seen as holistic, that is, each mode of language supoorts and enhances overall language development. Furthermore, LL develops in relation to the context in which it is used, that is, it develops according to the situation, the topic under discussion and the relationship betwwen participants. Language also develops through active engagement of the learners. The role of the teacher or a more competent other is then seen as that of a facilitator in a learning context in which learners are viewed as equally capable of contributing to their learning through learning from and with each other (Holt and Willard-Holt, 2000). Vygotsky's theory of social interaction has been influential in highlighting the important role of social and cultural contexts in extending children's learning. The preliminary results of this study point toward the importance of the learning environment, particularly an informal environment in second language development. The results also highlight the need for learners (a) to be provided with opportunities to engage with meaningful and authentic texts, (b) to be allowed to make their own book choices, (c) to participate in large group, small group and individual activities to enable them to engage with a variety of texts, and (d) to confront vocabulary in a variety of ways through multiple texts and genres.
- Full Text:
- Authors: Tshuma, Sibhekinkosi Anna
- Date: 2014
- Subjects: Literacy programs -- South Africa -- Grahamstown Group reading -- South Africa -- Grahamstown Children -- Books and reading -- South Africa -- Grahamstown Books and reading -- Social aspects -- South Africa -- Grahamstown Second language acquisition Action research Social interaction -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1965 , http://hdl.handle.net/10962/d1011755
- Description: This study is part of a larger research programme that seeks to contribute towards an understanding of South Africa's complex literacy landscape and formulate strategies that may address these particularly in the Foundation Phase. It is a case study of one public primary school in Grahamstown where isiXhosa is used as a medium of instruction until Grade 3, after which the medium of instruction changes to English. This transition is not helped by the little reading that happens in the language at the FP. The learners under study are Grade 3 isiXhosa first language speakers, learning English as a First Additional Language (FAL) with limited exposure to the language. Through a qualitative participatory action research process, the study investigated the extent to which a reading club in general and a responsive reading programme in particular, might develop learners' English vocabulary at this particular school. The value of reading clubs as a vehicle for second language learning as well as the importance of considering learner needs in the development of the reading programme are key contributions this study makes. The study draws on social constructivism as a theoretical framework based on the principle that learning is a social acitvity. Vygotsky (1978) states that language learning (LL) takes place through interactions in meaningful events, rather that through isolated language activities. The process is seen as holistic, that is, each mode of language supoorts and enhances overall language development. Furthermore, LL develops in relation to the context in which it is used, that is, it develops according to the situation, the topic under discussion and the relationship betwwen participants. Language also develops through active engagement of the learners. The role of the teacher or a more competent other is then seen as that of a facilitator in a learning context in which learners are viewed as equally capable of contributing to their learning through learning from and with each other (Holt and Willard-Holt, 2000). Vygotsky's theory of social interaction has been influential in highlighting the important role of social and cultural contexts in extending children's learning. The preliminary results of this study point toward the importance of the learning environment, particularly an informal environment in second language development. The results also highlight the need for learners (a) to be provided with opportunities to engage with meaningful and authentic texts, (b) to be allowed to make their own book choices, (c) to participate in large group, small group and individual activities to enable them to engage with a variety of texts, and (d) to confront vocabulary in a variety of ways through multiple texts and genres.
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Redefining success : social justice and the ends of business
- Authors: Zorn, Gwendolyn Philippa
- Date: 2014
- Subjects: Success Social justice Success in business Social responsibility of business Business ethics Corporate profits
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2745 , http://hdl.handle.net/10962/d1012061
- Description: Success in business is for the most part defined in financial terms and, because of this, business operations are almost entirely, if not entirely, directed to this end. The principle behind this rationale has been informed by the thought that the best contribution businesses can make to social justice is to focus on the bottom line. By appealing to enlightened self-interest and the high premium people place on freedom, neoliberal economists like Milton Friedman and Friedrich Hayek argue that maximising profits is necessarily socially responsible. And, moreover, that not to pursue this end is socially irresponsible. Social responsibility is the ultimate justification that thinkers such as Friedman and Hayek appeal to when claiming that the business of business is to maximise profit. Yet this position is internally inconsistent. The position is ultimately justified by what is socially just but this means that in fact social justice, and not profit-making, ought to be the end of business. I shall argue that taking this commitment seriously involves rejecting the idea that the aim of business is to maximise profits. This is not to say that businesses should not make profits, rather it implies that this feature is not what ultimately makes them successful. The central contribution of this project is to resolve the contradictions embedded in the traditional approach to business by arguing that the primary aim of business is the promotion of social justice. To this end success in business needs to be redefined so that it reflects the achievement of its ultimate ends and not simply its instrumental means (profit) to the realisation of these aims. We ought then to revise our fundamental assumptions about the structures and policies that are necessary for business to achieve its real end of social justice.
- Full Text:
- Authors: Zorn, Gwendolyn Philippa
- Date: 2014
- Subjects: Success Social justice Success in business Social responsibility of business Business ethics Corporate profits
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2745 , http://hdl.handle.net/10962/d1012061
- Description: Success in business is for the most part defined in financial terms and, because of this, business operations are almost entirely, if not entirely, directed to this end. The principle behind this rationale has been informed by the thought that the best contribution businesses can make to social justice is to focus on the bottom line. By appealing to enlightened self-interest and the high premium people place on freedom, neoliberal economists like Milton Friedman and Friedrich Hayek argue that maximising profits is necessarily socially responsible. And, moreover, that not to pursue this end is socially irresponsible. Social responsibility is the ultimate justification that thinkers such as Friedman and Hayek appeal to when claiming that the business of business is to maximise profit. Yet this position is internally inconsistent. The position is ultimately justified by what is socially just but this means that in fact social justice, and not profit-making, ought to be the end of business. I shall argue that taking this commitment seriously involves rejecting the idea that the aim of business is to maximise profits. This is not to say that businesses should not make profits, rather it implies that this feature is not what ultimately makes them successful. The central contribution of this project is to resolve the contradictions embedded in the traditional approach to business by arguing that the primary aim of business is the promotion of social justice. To this end success in business needs to be redefined so that it reflects the achievement of its ultimate ends and not simply its instrumental means (profit) to the realisation of these aims. We ought then to revise our fundamental assumptions about the structures and policies that are necessary for business to achieve its real end of social justice.
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