Recruitment disruptors: an exploratory study on the perception of artificial intelligence amongst selected Eastern Cape Province recruiters
- Authors: Sobekwa, Sinazo
- Date: 2022-04
- Subjects: Uncatalogued
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/232238 , vital:49974
- Description: Thesis (MA) -- Faculty of Humanities, Psychology, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Sobekwa, Sinazo
- Date: 2022-04
- Subjects: Uncatalogued
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/232238 , vital:49974
- Description: Thesis (MA) -- Faculty of Humanities, Psychology, 2022
- Full Text:
- Date Issued: 2022-04
Investigations of water deficit interactions with heat and elevated carbon dioxide in wheat
- Authors: Mavindidze, Peter
- Date: 2021-02
- Subjects: Plants--Effect of heat on , Growth (Plants)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/20664 , vital:46422
- Description: Future climate is predicted to be characterised by elevated carbon dioxide (eCO2), as well as more incidences of heat and water deficit. eCO2 has been widely reported as enhancing growth, biomass and grain yield. To investigate the interactive effects of abiotic stresses on genotypic performance, an experiment was established in open-top chambers at the University of Rhodes eCO2 facility in Grahamstown, South Africa. The specific objectives of the study were: i) to evaluate the effects of eCO2 on wheat grain yield, yield components and grain quality under heat and terminal water deficit conditions; ii) to identify cultivar sources of tolerance to combined water deficit and heat stress under eCO2; iii) to identify appropriate stress indices that can be used as screening tools for tolerance to combined effects of water deficit and heat stress under eCO2. A total of 19 wheat genotypes were evaluated in three environments varying in CO2, temperature and water deficit during the 2019 winter season. The experiment was laid out in a split-split plot design arranged in blocks inside the chambers. The parameters recorded were: leaf water potential (LWP), biomass content (TB), number of productive tillers (NPT), days to flowering (DTA), days to maturity (DTM), plant height (PH), thousand kernel weight (TKW), number of kernels per spike (KPS), kernel weight per spike (KWS) and total grain weight (TGW). The following stress indices were determined: tolerance index, stress tolerance, yield susceptibility index, mean productivity, geometric mean productivity, stress intensity index and yield index. Elevated atmospheric CO2 ameliorated the negative effects of combined heat and water deficit stress by enhancing LWP, NPT, KPS, TB and TGW. Wheat genotypes responded the same way to CO2 with respect to grain yield. Furthermore, adequate water supply mitigated the adverse effects of heat stress. In addition, the combined effects of eCO2, heat and water deficit are confounding and hypo-additive in nature. The separation of environmental effects revealed that significant genotypic responses on grain yield and biomass were caused by heat and water deficit stress, while eCO2 mitigated their negative effects, promoting growth and reproduction. Both Principal component analysis (PCA) biplot analysis and cultivar superiority measure proved to be reliable statistical tools since they managed to identify 13-5HTSBWYT-H18, Ncema and SST8135 as having both specific adaptations to future climates as well as wide adaption to multiple environments. The genotypes may be used as sources (parents for crosses) for wide adaptation in breeding programmes in the wake of predicted future climate environments. PCA biplot analysis identified mean productivity (MP) and geometric mean productivity (GMP) as the best indices; hence can also be as secondary traits complimenting traditional agronomic and physiological traits in wheat breeding under environments varying in water availability, CO2 and temperature. The interactive effects of eCO2 with heat and water deficit stress did not significantly compromise the grain physical characteristics, flour extraction, protein content, falling number and flour ash. eCO2 ameliorated the negative effects of heat and water deficit by increasing protein content by 4.75 percent , Thesis (MSc) (Crop Science) -- University of Fort Hare, 2021
- Full Text:
- Date Issued: 2021-02
- Authors: Mavindidze, Peter
- Date: 2021-02
- Subjects: Plants--Effect of heat on , Growth (Plants)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/20664 , vital:46422
- Description: Future climate is predicted to be characterised by elevated carbon dioxide (eCO2), as well as more incidences of heat and water deficit. eCO2 has been widely reported as enhancing growth, biomass and grain yield. To investigate the interactive effects of abiotic stresses on genotypic performance, an experiment was established in open-top chambers at the University of Rhodes eCO2 facility in Grahamstown, South Africa. The specific objectives of the study were: i) to evaluate the effects of eCO2 on wheat grain yield, yield components and grain quality under heat and terminal water deficit conditions; ii) to identify cultivar sources of tolerance to combined water deficit and heat stress under eCO2; iii) to identify appropriate stress indices that can be used as screening tools for tolerance to combined effects of water deficit and heat stress under eCO2. A total of 19 wheat genotypes were evaluated in three environments varying in CO2, temperature and water deficit during the 2019 winter season. The experiment was laid out in a split-split plot design arranged in blocks inside the chambers. The parameters recorded were: leaf water potential (LWP), biomass content (TB), number of productive tillers (NPT), days to flowering (DTA), days to maturity (DTM), plant height (PH), thousand kernel weight (TKW), number of kernels per spike (KPS), kernel weight per spike (KWS) and total grain weight (TGW). The following stress indices were determined: tolerance index, stress tolerance, yield susceptibility index, mean productivity, geometric mean productivity, stress intensity index and yield index. Elevated atmospheric CO2 ameliorated the negative effects of combined heat and water deficit stress by enhancing LWP, NPT, KPS, TB and TGW. Wheat genotypes responded the same way to CO2 with respect to grain yield. Furthermore, adequate water supply mitigated the adverse effects of heat stress. In addition, the combined effects of eCO2, heat and water deficit are confounding and hypo-additive in nature. The separation of environmental effects revealed that significant genotypic responses on grain yield and biomass were caused by heat and water deficit stress, while eCO2 mitigated their negative effects, promoting growth and reproduction. Both Principal component analysis (PCA) biplot analysis and cultivar superiority measure proved to be reliable statistical tools since they managed to identify 13-5HTSBWYT-H18, Ncema and SST8135 as having both specific adaptations to future climates as well as wide adaption to multiple environments. The genotypes may be used as sources (parents for crosses) for wide adaptation in breeding programmes in the wake of predicted future climate environments. PCA biplot analysis identified mean productivity (MP) and geometric mean productivity (GMP) as the best indices; hence can also be as secondary traits complimenting traditional agronomic and physiological traits in wheat breeding under environments varying in water availability, CO2 and temperature. The interactive effects of eCO2 with heat and water deficit stress did not significantly compromise the grain physical characteristics, flour extraction, protein content, falling number and flour ash. eCO2 ameliorated the negative effects of heat and water deficit by increasing protein content by 4.75 percent , Thesis (MSc) (Crop Science) -- University of Fort Hare, 2021
- Full Text:
- Date Issued: 2021-02
An evaluation of the effectiveness of area-based conservation intervention in avoiding biodiversity loss in South Africa
- Authors: Van Straten, Maurice Oswald
- Date: 2023-04
- Subjects: Soil conservation -- South Africa , Livestock farms – South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61132 , vital:69765
- Description: Habitat degradation, livestock farming, crop cultivation, rangeland overutilization and veld mismanagement are among the factors causing biodiversity loss worldwide. Rangelands in arid and semi-arid environments are no exception, as they are under stress from conversion into cropland and pressure from livestock farming. In these arid areas, rainfall is unpredictable and plant recruitment levels low, resulting in veld rehabilitation being a potentially expensive and time-consuming undertaking for landowners. Landowners implement different rehabilitation methods to increase overall vegetation cover and prevent further soil and vegetation degradation. These rehabilitation methods may include the creation of micro-catchments, mulching, brushpacking, ripping, geotextiles, stone cobbling and erosion control fences, individually or in combination with the addition of reseeding, replanting, and use of manure or fertilizer to supplement land rehabilitation. This study investigated the significance of three rehabilitation methods (hollows, brush packing and a combination of these two methods) on water infiltration rates, soil moisture content, and vegetation canopy cover with associated growth form canopy cover over a period of 17 months (March 2021 to August 2022). This study showed that rehabilitation methods implemented had no significant impact on water infiltration rates and vegetation canopy cover. However, rehabilitation methods had a significant impact on soil moisture content. The use of a hollows is recommended when attempting to increase the soil moisture content percentage when performing rehabilitation. Overall vegetation canopy cover is influenced more by seasonal changes than by the rehabilitation methods implemented. This study indicated that the creation of micro-catchments is an effective rehabilitation method to use in an arid area, as it promotes vegetation establishment and growth. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Science and Management , 2023
- Full Text:
- Date Issued: 2023-04
- Authors: Van Straten, Maurice Oswald
- Date: 2023-04
- Subjects: Soil conservation -- South Africa , Livestock farms – South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/61132 , vital:69765
- Description: Habitat degradation, livestock farming, crop cultivation, rangeland overutilization and veld mismanagement are among the factors causing biodiversity loss worldwide. Rangelands in arid and semi-arid environments are no exception, as they are under stress from conversion into cropland and pressure from livestock farming. In these arid areas, rainfall is unpredictable and plant recruitment levels low, resulting in veld rehabilitation being a potentially expensive and time-consuming undertaking for landowners. Landowners implement different rehabilitation methods to increase overall vegetation cover and prevent further soil and vegetation degradation. These rehabilitation methods may include the creation of micro-catchments, mulching, brushpacking, ripping, geotextiles, stone cobbling and erosion control fences, individually or in combination with the addition of reseeding, replanting, and use of manure or fertilizer to supplement land rehabilitation. This study investigated the significance of three rehabilitation methods (hollows, brush packing and a combination of these two methods) on water infiltration rates, soil moisture content, and vegetation canopy cover with associated growth form canopy cover over a period of 17 months (March 2021 to August 2022). This study showed that rehabilitation methods implemented had no significant impact on water infiltration rates and vegetation canopy cover. However, rehabilitation methods had a significant impact on soil moisture content. The use of a hollows is recommended when attempting to increase the soil moisture content percentage when performing rehabilitation. Overall vegetation canopy cover is influenced more by seasonal changes than by the rehabilitation methods implemented. This study indicated that the creation of micro-catchments is an effective rehabilitation method to use in an arid area, as it promotes vegetation establishment and growth. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Science and Management , 2023
- Full Text:
- Date Issued: 2023-04
Investigating the impact of capital account liberalization on economic growth: A case study of South Africa
- Khumalo, Sibanisezwe A. (https://orcid.org/0000-0002-4330-9249)
- Authors: Khumalo, Sibanisezwe A. (https://orcid.org/0000-0002-4330-9249)
- Date: 2011
- Subjects: Capital Movements--South Africa , Investment, Foreign--South Africa South Africa , Free Trade--South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/25800 , vital:64486
- Description: The increased interest in capital flows has made it imperative to understand how they impact a particular economy. The Global drive for an interlinked world economy has increased the need for monetary authorities and Governments to able to effectively deal with any negative spins off from capital flows and also be able to take advantage of positive effects capital flows may have on an economy. The study seeks to understand how the change to lift restrictions on capital flows into the South African economy may have impacted on economic growth. The study analyses the relationship that existed between capital flows, that is to say foreign direct investment (FDI) and portfolio investment (P_I) and economic growth under the period of capital controls (1975 Q1 to 1994Q1). Then study will then analyse the same relationship but this time under the liberalised period (1994 Q2 to 2010 Q2) and compare how the long run relationship has changed after capital account liberalisation. The study uses an endogenous model to determine the relationship. The study unlike most will focus on a single economy, which is South Africa and not use panel data like most previous studies. The study found that in the short run capital account liberalising aided economic growth as both FDI and P_I became significant, with positive coefficients and also found that there is long run relationship between economic growth and capital flows. In the long run FDI is significant while P_I is not. After liberalisation FDI adjusted faster in the long run than before liberalisation on its impact on economic output. Also of note was that the study found that under capital controls the conditional variance was constant but after liberalisation the relationship between capital flows and economic growth became more sensitive to negative news and the conditional variance was not constant thus indication of increased volatility. To maximise from opening up of capital accounts the economy should maintain sound macroeconomic policies. This will help shield the economy from the external shocks and this maintain economic growth. , Thesis (MA) -- Faculty of Management and Commerce, 2011
- Full Text:
- Date Issued: 2011
- Authors: Khumalo, Sibanisezwe A. (https://orcid.org/0000-0002-4330-9249)
- Date: 2011
- Subjects: Capital Movements--South Africa , Investment, Foreign--South Africa South Africa , Free Trade--South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/25800 , vital:64486
- Description: The increased interest in capital flows has made it imperative to understand how they impact a particular economy. The Global drive for an interlinked world economy has increased the need for monetary authorities and Governments to able to effectively deal with any negative spins off from capital flows and also be able to take advantage of positive effects capital flows may have on an economy. The study seeks to understand how the change to lift restrictions on capital flows into the South African economy may have impacted on economic growth. The study analyses the relationship that existed between capital flows, that is to say foreign direct investment (FDI) and portfolio investment (P_I) and economic growth under the period of capital controls (1975 Q1 to 1994Q1). Then study will then analyse the same relationship but this time under the liberalised period (1994 Q2 to 2010 Q2) and compare how the long run relationship has changed after capital account liberalisation. The study uses an endogenous model to determine the relationship. The study unlike most will focus on a single economy, which is South Africa and not use panel data like most previous studies. The study found that in the short run capital account liberalising aided economic growth as both FDI and P_I became significant, with positive coefficients and also found that there is long run relationship between economic growth and capital flows. In the long run FDI is significant while P_I is not. After liberalisation FDI adjusted faster in the long run than before liberalisation on its impact on economic output. Also of note was that the study found that under capital controls the conditional variance was constant but after liberalisation the relationship between capital flows and economic growth became more sensitive to negative news and the conditional variance was not constant thus indication of increased volatility. To maximise from opening up of capital accounts the economy should maintain sound macroeconomic policies. This will help shield the economy from the external shocks and this maintain economic growth. , Thesis (MA) -- Faculty of Management and Commerce, 2011
- Full Text:
- Date Issued: 2011
The perceptions of employees and employer on the ever increasing use of technology: the case of the acoustex in Port Elizabeth
- Authors: Matamela, Wanga
- Date: 2020-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54783 , vital:47664
- Description: It is evident that many companies and organization are currently using high powered technology to be at par with the trends throughout the globe. This research focuses on the perception of workers and management on the Fourth Industrial Revolution at Acoustex in Port Elizabeth. The research objectives of this study is firstly, to investigate the perceptions of workers and management at Acoustex in Port Elizabeth. Secondly, to contribute within economic and industrial anthropology with reference to Port Elizabeth in the Eastern Cape and raise awareness. Thirdly, to propose recommendations that can be used by industries and the government to save jobs. The research methodology employed in this study include among others, individual interviews using an interview guide containing questions that is relevant to the study. To supplement the above, secondary sources ranging from relevant scholarly journals and books were consulted. Ethical compliance was adhered to by the researcher in terms of applying for permission to conduct interviews and it was granted. The concept unemployment was used as a conceptual framework to understand the impact of Fourth Industrial Revolution at Acoustex in particular and workplace in general. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2020
- Full Text:
- Date Issued: 2020-04
- Authors: Matamela, Wanga
- Date: 2020-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54783 , vital:47664
- Description: It is evident that many companies and organization are currently using high powered technology to be at par with the trends throughout the globe. This research focuses on the perception of workers and management on the Fourth Industrial Revolution at Acoustex in Port Elizabeth. The research objectives of this study is firstly, to investigate the perceptions of workers and management at Acoustex in Port Elizabeth. Secondly, to contribute within economic and industrial anthropology with reference to Port Elizabeth in the Eastern Cape and raise awareness. Thirdly, to propose recommendations that can be used by industries and the government to save jobs. The research methodology employed in this study include among others, individual interviews using an interview guide containing questions that is relevant to the study. To supplement the above, secondary sources ranging from relevant scholarly journals and books were consulted. Ethical compliance was adhered to by the researcher in terms of applying for permission to conduct interviews and it was granted. The concept unemployment was used as a conceptual framework to understand the impact of Fourth Industrial Revolution at Acoustex in particular and workplace in general. , Thesis (MA) -- Faculty of Humanities, School of Governmental and Social Sciences, 2020
- Full Text:
- Date Issued: 2020-04
A case study of role conflict experienced by middle management during organizational change
- Authors: Sepeng, Mugabe
- Date: 2023-10-13
- Subjects: Role conflict , Change management , Middle managers , Middle management , ISO 9001 Standard Implementation of
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/419189 , vital:71624
- Description: This research investigation is based on continuous improvement changes arising from - and related to - ISO 9001 implementation at Sundays River Citrus Company (SRCC), which is one of the biggest packers, marketers, and exporters of citrus fruit in South Africa. The Board of SRCC adopted ISO 9001 to ensure organizational efficiency and sustainability while improving quality control, customer service, teamwork and leadership. However, research indicates not all organizations that have Implemented ISO 9001 realize the intended benefits. While no research was available on the citrus agriculture industry, research in the tourism industry indicates that not only did some companies not realize the expected benefits, but also incurred substantial investment costs. It is estimated that approximately thirty to ninety percent of change initiatives fail to meet their objectives, and research studies also indicate that middle managers play a critical role that can influence the outcomes of a change project. However, Balogun (2003) indicates that middle managers play a complex role and are exposed to role conflict, which can influence the outcomes of change initiatives. In this context, this research study aimed to investigate the role conflicts experienced by middle managers during the process of an ISO 9001 continuous improvement change. The study draws on role theory, applying it to their management of change. The following role conflict types were investigated: (1) intra-sender conflict, (2) inter-sender role conflict, (3) inter-role conflict, (4) role ambiguity and (5) role strain. The research approach is qualitative, and has adopted a post-positivist paradigm, utilizing a deductive qualitative method. The study adopted a case study approach. Data was gathered mainly from interviews and supported by organizational documents. Semi structured interviews were conducted with questions formulated through the use of the coding manual (See Appendix C) to ensure alignment of data collection with the research propositions derived from literature. A deductive thematic analysis method was used to analyze the interview data. The research findings confirmed that during continuous improvement change, as middle managers strived to satisfy the incompatible expectations of role senders (mainly senior and junior managers), they experienced the five role conflict types. The study findings also indicate that middle managers experience conflicts due to the incompatible expectations of other role senders such as quality and marketing departments. The findings suggest that middle managers are managing these conflicts, but notes that they do require some assistance and support from senior management. The study concludes with managerial and research recommendations. , Thesis (MBA) -- Faculty of Commerce, Rhodes Business School, 2023
- Full Text:
- Date Issued: 2023-10-13
- Authors: Sepeng, Mugabe
- Date: 2023-10-13
- Subjects: Role conflict , Change management , Middle managers , Middle management , ISO 9001 Standard Implementation of
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/419189 , vital:71624
- Description: This research investigation is based on continuous improvement changes arising from - and related to - ISO 9001 implementation at Sundays River Citrus Company (SRCC), which is one of the biggest packers, marketers, and exporters of citrus fruit in South Africa. The Board of SRCC adopted ISO 9001 to ensure organizational efficiency and sustainability while improving quality control, customer service, teamwork and leadership. However, research indicates not all organizations that have Implemented ISO 9001 realize the intended benefits. While no research was available on the citrus agriculture industry, research in the tourism industry indicates that not only did some companies not realize the expected benefits, but also incurred substantial investment costs. It is estimated that approximately thirty to ninety percent of change initiatives fail to meet their objectives, and research studies also indicate that middle managers play a critical role that can influence the outcomes of a change project. However, Balogun (2003) indicates that middle managers play a complex role and are exposed to role conflict, which can influence the outcomes of change initiatives. In this context, this research study aimed to investigate the role conflicts experienced by middle managers during the process of an ISO 9001 continuous improvement change. The study draws on role theory, applying it to their management of change. The following role conflict types were investigated: (1) intra-sender conflict, (2) inter-sender role conflict, (3) inter-role conflict, (4) role ambiguity and (5) role strain. The research approach is qualitative, and has adopted a post-positivist paradigm, utilizing a deductive qualitative method. The study adopted a case study approach. Data was gathered mainly from interviews and supported by organizational documents. Semi structured interviews were conducted with questions formulated through the use of the coding manual (See Appendix C) to ensure alignment of data collection with the research propositions derived from literature. A deductive thematic analysis method was used to analyze the interview data. The research findings confirmed that during continuous improvement change, as middle managers strived to satisfy the incompatible expectations of role senders (mainly senior and junior managers), they experienced the five role conflict types. The study findings also indicate that middle managers experience conflicts due to the incompatible expectations of other role senders such as quality and marketing departments. The findings suggest that middle managers are managing these conflicts, but notes that they do require some assistance and support from senior management. The study concludes with managerial and research recommendations. , Thesis (MBA) -- Faculty of Commerce, Rhodes Business School, 2023
- Full Text:
- Date Issued: 2023-10-13
The depositional history and evaluation of two late quaternary, diamondiferous pocket beaches, south-western Namibia
- Authors: Milad, Micael George
- Date: 2004-03
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/420934 , vital:71795
- Description: The two Late Quaternary, diamondiferous pocket beach deposits studied here are situated along a 10 km stretch of the storm-dominated, Atlantic coastline of the Sperrgebiet, south-western Namibia. The pocket beaches are approximately 130 km north of the Orange River mouth, which is widely accepted as a long-lived point source for diamonds sourced from the interior of southern Africa. A total of fourteen pocket beach deposits were recently evaluated in this area, but only two of these, namely Site 2 (to the south) and Site 3 (to the north), are considered here. The main diamondbearing horizons are beach gravels, which occur within, and form part of, the pocket beach sequences. The beach gravels are mostly blanketed by sand overburden, meaning that exposures available for study were limited, and much reliance was placed on borehole logging and observations of evaluation sample tailings. The main aims are to unravel the depositional history of the pocket beach sequences, identify the controls on diamond mineralisation in the beach gravels, and critically examine two different methods of estimating average diamond size for the deposits. In pursuit of these aims, sedimentological characteristics of the unconsolidated pocket beach deposits were recorded using small diameter drill holes, hydraulic grab bulk samples, trench exposures and surface outcrops. The surface geology, geomorphology and modern wave patterns were mapped using high-resolution, Airborne Laser Survey imagery coupled with extensive field checking. Three-dimensional geological modeling software was used to gain insight into the subsurface morphology of the deposits. Fossil shell samples were used to aid interpretation of ancient depositional environments and to date parts of the pocket beach sequences. Variations in diamond concentration and the size of diamonds were recorded using bulk samples, some of which were taken from a trench, but most of which were excavated using a hydraulic grab tool called the GB50. Finally, by using diamond size data from Site 3, sample data from diamondiferous beach gravels to the south of the study area and sample campaign simulations, two alternative methods of evaluating average diamond size in marine gravel deposits were appraised.The pocket beach sequences occur within north-south trending valleys of a major deflation basin and are separated from one another by rocky headlands. The ridge-and-valley topography of the deflation basin has resulted from differential erosion of Late Proterozoic basement rock units, alternating layers of which differ greatly in their resistance to the long-lived, local denudationalprocesses. On the basis of the stratigraphic information collected from the unconsolidated pocket beach valley fills, interpreted within the context of global, Late Pleistocene sea level records, the following depositional history is deduced : a) Deposition of sheetflood gravels by ephemeral streams, activated during a regressive phase. b) Transgression, culminating in the deposition of a gravel beach, representing a sea level highstand of +4 metres above mean sea level (mamsl) at between 120 000 and 130 000 BP. c)A regressive phase, resulting in deflation of former valley fills to the bedrock valley floor and accompanied by re-activation of ephemeral stream activity to form sheetflood deposits; this represents a protracted period of subaerial exposure of the +4 m gravel beach deposit. d) Deposition of a great volume of sediment in the valleys during the latter stages of the transgression from the Last Glacial Maximum (LGM). The sequence generated during this phase, which started at ca. 9 000 BP, contains : i) pan/coastal sabkha sediments, ii) shallow, sheltered bay sediments, iii) back-barrier lagoonal sediments, iv) a gravel beach deposit representing a sea level stillstand at -5 mamsl, laid down between 7 600 and 5 600 BP, v) another gravel beach deposit representing the well-known Middle Holocene sea level highstand at +2 to +3 mamsl, laid down at ca. 5 000 BP, and which terminated the transgression from the LGM. e) A minor regression to the current sea level, accompanied by progradation of the shoreline to its current position. This progradational marine unit consists almost entirely of sand and grit, reflecting the lack of gravel supply to this part of the coastline in the most recent past. f) Deposition of modern coastal dunes, which cap the pocket beach sequence and are the youngest sediments in the study area. Using trench and hydraulic grab evaluation sample results, in combination with analysis of wave patterns and field observations, the following local controls on the density distribution (ie. concentration) and size distribution of diamonds in the gravel beach deposits (+4, -5 and +2 to +3 mamsl stands) are recognised: a) Gravel beach depositional processes, which are responsible for clast sorting on the beach, have influenced the density and size distribution of diamonds. The infill zone, or beach toe, favours maximum diamond concentration while diamond size decreases from the imbricate zone (intertidal) to the infill zone (subtidal). b) Wave energy is identified as the dominant local control on diamond size distribution, but has also influenced diamond concentration to a limited degree. Larger diamonds are intimately associated with coarser beach gravels, both of which are a reflection of increased wave energy. Higher concentrations of diamonds are sometimes associated with zones of coarser gravel and therefore greater wave energy. c) The time of deposition of the host gravel beach is seen to be the dominant controlling factor with respect to diamond concentration. This is seen as evidence of significant temporal variation in the availability of diamonds in the littoral evironment. A significant reduction (20%) in average diamond size from Site 2 to Site 3, over a distance of only 6 km, is evident. The following were identified as reasons for this reduction in diamond size : a) Longshore sorting processes, of which the long-lived northerly littoral drift is a key part, are known to have played a role in the diminution of diamond size northwards from the Orange River mouth point source. However, it is believed that this can only partly account for the observed 20% reduction in diamond size. b) Input of sediment and smaller diamonds at Site 3, reworked out of an older, Eocene-aged marine succession in the hinterland, is recognised as a possible additional reason for the large reduction in diamond size from Site 2 to Site 3. It is also speculated that the large size of the pocket beach at Site 3, relative to Site 2, may have resulted in lower average wave energy at Site 3, with consequent reduced average diamond size. Diamond size in the beach gravels of Site 3, as well as in beach gravels elsewhere in the Sperrgebiet, is seen to be lognormally-distributed within geologically homogeneous zones. In theory, lognormal mean estimators represent the best method of estimating average diamond size in such cases, whereas the arithmetic mean estimator has the tendency to overestimate when large outlier values occur. Lognormal mean estimators have the added benefit of providing for the calculation of confidence limits, which are becoming increasingly more important as financial lending institutions insist on better quantification of the risk involved in resource estimates. Sample campaign simulations demonstrate, for the kinds of diamond size-frequency distributions typical of beach gravel deposits at Site 3, that there is no significant improvement in the accuracy of average diamond size estimates when lognormal mean estimators are used instead of the arithmetic mean estimator. This is because the variance (a ) of the diamond populations is low, and large outlier values are extremely unlikely to occur. However, simulation of a diamond population with high variance, drawn from a sample of beach gravels near the Orange River mouth, shows that lognormal estimators produce significantly more accurate results when a is large. Since individual diamond weights were not recorded during evaluation sampling of Site 3, numerical solution of lognormal estimators is not possible, and these would need to be solved using a less accurate graphical method. It is therefore recommended that individual diamond weights are recorded in future sampling campaigns, allowing for the use of lognormal mean estimators, and the calculation of confidence limits for average diamond size estimates. , Thesis (MSc) -- Science, Geology, 2004
- Full Text:
- Date Issued: 2004-03
- Authors: Milad, Micael George
- Date: 2004-03
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/420934 , vital:71795
- Description: The two Late Quaternary, diamondiferous pocket beach deposits studied here are situated along a 10 km stretch of the storm-dominated, Atlantic coastline of the Sperrgebiet, south-western Namibia. The pocket beaches are approximately 130 km north of the Orange River mouth, which is widely accepted as a long-lived point source for diamonds sourced from the interior of southern Africa. A total of fourteen pocket beach deposits were recently evaluated in this area, but only two of these, namely Site 2 (to the south) and Site 3 (to the north), are considered here. The main diamondbearing horizons are beach gravels, which occur within, and form part of, the pocket beach sequences. The beach gravels are mostly blanketed by sand overburden, meaning that exposures available for study were limited, and much reliance was placed on borehole logging and observations of evaluation sample tailings. The main aims are to unravel the depositional history of the pocket beach sequences, identify the controls on diamond mineralisation in the beach gravels, and critically examine two different methods of estimating average diamond size for the deposits. In pursuit of these aims, sedimentological characteristics of the unconsolidated pocket beach deposits were recorded using small diameter drill holes, hydraulic grab bulk samples, trench exposures and surface outcrops. The surface geology, geomorphology and modern wave patterns were mapped using high-resolution, Airborne Laser Survey imagery coupled with extensive field checking. Three-dimensional geological modeling software was used to gain insight into the subsurface morphology of the deposits. Fossil shell samples were used to aid interpretation of ancient depositional environments and to date parts of the pocket beach sequences. Variations in diamond concentration and the size of diamonds were recorded using bulk samples, some of which were taken from a trench, but most of which were excavated using a hydraulic grab tool called the GB50. Finally, by using diamond size data from Site 3, sample data from diamondiferous beach gravels to the south of the study area and sample campaign simulations, two alternative methods of evaluating average diamond size in marine gravel deposits were appraised.The pocket beach sequences occur within north-south trending valleys of a major deflation basin and are separated from one another by rocky headlands. The ridge-and-valley topography of the deflation basin has resulted from differential erosion of Late Proterozoic basement rock units, alternating layers of which differ greatly in their resistance to the long-lived, local denudationalprocesses. On the basis of the stratigraphic information collected from the unconsolidated pocket beach valley fills, interpreted within the context of global, Late Pleistocene sea level records, the following depositional history is deduced : a) Deposition of sheetflood gravels by ephemeral streams, activated during a regressive phase. b) Transgression, culminating in the deposition of a gravel beach, representing a sea level highstand of +4 metres above mean sea level (mamsl) at between 120 000 and 130 000 BP. c)A regressive phase, resulting in deflation of former valley fills to the bedrock valley floor and accompanied by re-activation of ephemeral stream activity to form sheetflood deposits; this represents a protracted period of subaerial exposure of the +4 m gravel beach deposit. d) Deposition of a great volume of sediment in the valleys during the latter stages of the transgression from the Last Glacial Maximum (LGM). The sequence generated during this phase, which started at ca. 9 000 BP, contains : i) pan/coastal sabkha sediments, ii) shallow, sheltered bay sediments, iii) back-barrier lagoonal sediments, iv) a gravel beach deposit representing a sea level stillstand at -5 mamsl, laid down between 7 600 and 5 600 BP, v) another gravel beach deposit representing the well-known Middle Holocene sea level highstand at +2 to +3 mamsl, laid down at ca. 5 000 BP, and which terminated the transgression from the LGM. e) A minor regression to the current sea level, accompanied by progradation of the shoreline to its current position. This progradational marine unit consists almost entirely of sand and grit, reflecting the lack of gravel supply to this part of the coastline in the most recent past. f) Deposition of modern coastal dunes, which cap the pocket beach sequence and are the youngest sediments in the study area. Using trench and hydraulic grab evaluation sample results, in combination with analysis of wave patterns and field observations, the following local controls on the density distribution (ie. concentration) and size distribution of diamonds in the gravel beach deposits (+4, -5 and +2 to +3 mamsl stands) are recognised: a) Gravel beach depositional processes, which are responsible for clast sorting on the beach, have influenced the density and size distribution of diamonds. The infill zone, or beach toe, favours maximum diamond concentration while diamond size decreases from the imbricate zone (intertidal) to the infill zone (subtidal). b) Wave energy is identified as the dominant local control on diamond size distribution, but has also influenced diamond concentration to a limited degree. Larger diamonds are intimately associated with coarser beach gravels, both of which are a reflection of increased wave energy. Higher concentrations of diamonds are sometimes associated with zones of coarser gravel and therefore greater wave energy. c) The time of deposition of the host gravel beach is seen to be the dominant controlling factor with respect to diamond concentration. This is seen as evidence of significant temporal variation in the availability of diamonds in the littoral evironment. A significant reduction (20%) in average diamond size from Site 2 to Site 3, over a distance of only 6 km, is evident. The following were identified as reasons for this reduction in diamond size : a) Longshore sorting processes, of which the long-lived northerly littoral drift is a key part, are known to have played a role in the diminution of diamond size northwards from the Orange River mouth point source. However, it is believed that this can only partly account for the observed 20% reduction in diamond size. b) Input of sediment and smaller diamonds at Site 3, reworked out of an older, Eocene-aged marine succession in the hinterland, is recognised as a possible additional reason for the large reduction in diamond size from Site 2 to Site 3. It is also speculated that the large size of the pocket beach at Site 3, relative to Site 2, may have resulted in lower average wave energy at Site 3, with consequent reduced average diamond size. Diamond size in the beach gravels of Site 3, as well as in beach gravels elsewhere in the Sperrgebiet, is seen to be lognormally-distributed within geologically homogeneous zones. In theory, lognormal mean estimators represent the best method of estimating average diamond size in such cases, whereas the arithmetic mean estimator has the tendency to overestimate when large outlier values occur. Lognormal mean estimators have the added benefit of providing for the calculation of confidence limits, which are becoming increasingly more important as financial lending institutions insist on better quantification of the risk involved in resource estimates. Sample campaign simulations demonstrate, for the kinds of diamond size-frequency distributions typical of beach gravel deposits at Site 3, that there is no significant improvement in the accuracy of average diamond size estimates when lognormal mean estimators are used instead of the arithmetic mean estimator. This is because the variance (a ) of the diamond populations is low, and large outlier values are extremely unlikely to occur. However, simulation of a diamond population with high variance, drawn from a sample of beach gravels near the Orange River mouth, shows that lognormal estimators produce significantly more accurate results when a is large. Since individual diamond weights were not recorded during evaluation sampling of Site 3, numerical solution of lognormal estimators is not possible, and these would need to be solved using a less accurate graphical method. It is therefore recommended that individual diamond weights are recorded in future sampling campaigns, allowing for the use of lognormal mean estimators, and the calculation of confidence limits for average diamond size estimates. , Thesis (MSc) -- Science, Geology, 2004
- Full Text:
- Date Issued: 2004-03
An investigation into employment-readiness perceptions of University of Fort Hare students
- Chigbu, Bianca Ifeoma https://orcid.org/0000-0003-4029-9580
- Authors: Chigbu, Bianca Ifeoma https://orcid.org/0000-0003-4029-9580
- Date: 2015-02
- Subjects: Universities and colleges -- Graduate work , College graduates -- Employment
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/25709 , vital:64472
- Description: The aim of this study is to establish the employment-readiness perception of prospective University of Fort Hare Alice campus graduates. To do this, the study determined the capability of these prospective graduates to face the demands of the labor market. In addition, the study also wanted inter alia to find out whether there exist a relationship between prospective graduates perceived level of skills and their readiness to engage in the work environment. Astin’s Input-Environment-Outcome model of student development, which posits that students’ academic development in universities is affected by their own inputs as learners in addition to the institutional environment, has been utilized as the theoretical framework for this study. Hence a number of hypothesis informed by Astin’s model about whether there exist a relationship between perceived output, skills and readiness of prospective graduates for the workplace, on the one hand, and university education/training, on the other, were derived. To test these hypotheses the study utilized a quantitative research approach anchored around a survey design. In fact ample studies, which have investigated the issues of employability skills and prospective graduates’ readiness for work, have adopted this type of research design with a questionnaire as a preferred research instrument. After collecting data through the use of a mainly Likert scale based survey questionnaire, the findings of the study indicated inter alia that the university environment has a direct influence on the input of students to their study and skills acquisition in addition to the fact that faculty influence is directly correlated to students’ output, skills and readiness for employment. Hence the conclusion that for any tertiary institution like the University of Fort Hare to function effectively or optimally, the institutional environment, faculty influence and student input have to satisfy the best assessment criteria at the exit level, such that an output of quality prospective graduates imbued with all employment readiness characteristics can be guaranteed. Self-driven individuals with willingness to involve themselves in lifelong learning, who are capable of self-improvement and of taking advantages of innovative opportunities, are what the country’s economy need. These findings are in agreement with Astin’s model, which proposes that learning development is an interacting system of student input, institutional settings, and the students’ output. Results and conclusions of a significant number of other empirical studies concur with the results of this study. Furthermore the findings of the current study contribute to the graduate work readiness literature in a number of ways. For instance, the work process in modern organizations has been greatly transformed and as such that only high levels of skills, abilities and talented graduates are qualified to fit in such a labor market. The changing demands of the education competitive market have generated a belief that the educational sector will react in ways that are innovative with the aim of both the learning needs and the career objectives for its learners to be reached. Hence it is proposed that tertiary institutions in South Africa make it mandatory for learners to at least have three weeks work placement as one of their requirement for graduation. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2015
- Full Text:
- Date Issued: 2015-02
- Authors: Chigbu, Bianca Ifeoma https://orcid.org/0000-0003-4029-9580
- Date: 2015-02
- Subjects: Universities and colleges -- Graduate work , College graduates -- Employment
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/25709 , vital:64472
- Description: The aim of this study is to establish the employment-readiness perception of prospective University of Fort Hare Alice campus graduates. To do this, the study determined the capability of these prospective graduates to face the demands of the labor market. In addition, the study also wanted inter alia to find out whether there exist a relationship between prospective graduates perceived level of skills and their readiness to engage in the work environment. Astin’s Input-Environment-Outcome model of student development, which posits that students’ academic development in universities is affected by their own inputs as learners in addition to the institutional environment, has been utilized as the theoretical framework for this study. Hence a number of hypothesis informed by Astin’s model about whether there exist a relationship between perceived output, skills and readiness of prospective graduates for the workplace, on the one hand, and university education/training, on the other, were derived. To test these hypotheses the study utilized a quantitative research approach anchored around a survey design. In fact ample studies, which have investigated the issues of employability skills and prospective graduates’ readiness for work, have adopted this type of research design with a questionnaire as a preferred research instrument. After collecting data through the use of a mainly Likert scale based survey questionnaire, the findings of the study indicated inter alia that the university environment has a direct influence on the input of students to their study and skills acquisition in addition to the fact that faculty influence is directly correlated to students’ output, skills and readiness for employment. Hence the conclusion that for any tertiary institution like the University of Fort Hare to function effectively or optimally, the institutional environment, faculty influence and student input have to satisfy the best assessment criteria at the exit level, such that an output of quality prospective graduates imbued with all employment readiness characteristics can be guaranteed. Self-driven individuals with willingness to involve themselves in lifelong learning, who are capable of self-improvement and of taking advantages of innovative opportunities, are what the country’s economy need. These findings are in agreement with Astin’s model, which proposes that learning development is an interacting system of student input, institutional settings, and the students’ output. Results and conclusions of a significant number of other empirical studies concur with the results of this study. Furthermore the findings of the current study contribute to the graduate work readiness literature in a number of ways. For instance, the work process in modern organizations has been greatly transformed and as such that only high levels of skills, abilities and talented graduates are qualified to fit in such a labor market. The changing demands of the education competitive market have generated a belief that the educational sector will react in ways that are innovative with the aim of both the learning needs and the career objectives for its learners to be reached. Hence it is proposed that tertiary institutions in South Africa make it mandatory for learners to at least have three weeks work placement as one of their requirement for graduation. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2015
- Full Text:
- Date Issued: 2015-02
Igalelo lokutshintsha-tshintsha ulwimi xa kufundiswa isiXhosa kwigumbi lokufundela kwibanga le-12
- Authors: Mini, Nolwandle
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54506 , vital:46619
- Description: Olu phando luza kugxila kwigalelo lokutshintsha kolwimi xa kufundiswa isiXhosa kwizikolo ezifundisa isiXhosa kulwimi olongezelweyo. Lo msebenzi wolu phando usekeleze kwigalelo lokutshintshwa tshintshwa kolwimi xa kufundiswa isiXhosa kwigumbi lokufundela. Olu phando luza Kubeka iliso elibanzi kwindlela ekuhlolwa ngalo ulwimi olongezelweleyo kunye nengxelo yeziphumo zokuphela konyaka wama – 2016 nowama- 2017. Abavavanyi kwingxelo zovavanya zovavanyo bayibeke elubala into yokungaphumeleli kwabafundi ngenxa yefuthe lokungawuvi umbuzo. , Thesis (MA) -- Faculty of Humanities, School of Language, Media and Communication, 2021
- Full Text: false
- Date Issued: 2021-12
- Authors: Mini, Nolwandle
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54506 , vital:46619
- Description: Olu phando luza kugxila kwigalelo lokutshintsha kolwimi xa kufundiswa isiXhosa kwizikolo ezifundisa isiXhosa kulwimi olongezelweyo. Lo msebenzi wolu phando usekeleze kwigalelo lokutshintshwa tshintshwa kolwimi xa kufundiswa isiXhosa kwigumbi lokufundela. Olu phando luza Kubeka iliso elibanzi kwindlela ekuhlolwa ngalo ulwimi olongezelweleyo kunye nengxelo yeziphumo zokuphela konyaka wama – 2016 nowama- 2017. Abavavanyi kwingxelo zovavanya zovavanyo bayibeke elubala into yokungaphumeleli kwabafundi ngenxa yefuthe lokungawuvi umbuzo. , Thesis (MA) -- Faculty of Humanities, School of Language, Media and Communication, 2021
- Full Text: false
- Date Issued: 2021-12
Groundwater exploration using borehole and geophysical techniques in the east of Raymond Mhlaba Local Municipality (formerly Nkonkobe Local Municipality) in the Eastern Cape Province, South Africa
- Authors: Xanga, Sithule
- Date: 2021-07
- Subjects: Groundwater ecology , Geophysical instruments , Borehole gravimetry
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22643 , vital:52616
- Description: The study area lies in the eastern portion of Raymond Mhlaba Local Municipality (RMLM), formerly known as Nkonkobe Local Municipality within the Eastern Cape Province of South Africa in the southeastern portion of the main Karoo Basin. Its northen part is mountainous with high altitude of about 1500 m with dense vegetation, whereas the southern part attains low altitude of about 600 m with sparse vegetation. The entire study area is covered on the surface by the Beaufort Group sediments comprised of three geological formations namely Middleton Formation, Balfour Formation members (Oudeberg, Daggaboersnek, Baberskrans, Elandsberg, and Pilangkloof), and the Katberg Formation. Karoo igneous bodies (dolerite dykes and sills) intruded the sediments causing fracturing. The area receives mean annual precipitation of about 54 mm. It is semi-arid to dry with insufficient surface water resources and hence the need for this research to explore for potential groundwater. Many techniques were employed to reveal the surface and subsurface geology, including groundwater potential areas using climate data, vegetation cover, borehole data analysis, geological field mapping, rock samples collection for petrographic analysis, a density-porosity determination, magnetic data analysis, and electrical resistivity tomography. The study area was divided into seven sub-regions, SR1 to SR7. The climate data showed that the area experiences high monthly average temperatures of about 21.6 °C during the summer, and is a semi-arid to dry region. Vegetation cover is dense in the mountainous northern part of the study area. It receives comparatively high rainfall, experiences less evapotranspiration than the southern part the low altitude, receives less rainfall, and has relatively high temperatures and evapotranspiration. A total of 385 boreholes from the Department Water and Sanitation were analysed and these showed that sub-regions SR1 up to SR7 had average borehole depths ranging from 51.9 to 67.7 m, water strike depths from 13.8 to 21.7 m and yields from 0.8 to 1.9 L/s. Sub-regions SR2, SR4, SR5, while SR7 have an average yield ≥ 1.4 L/s up to 1.9 L/s and are classified in this study as having a good or high groundwater yield potential. Fifteen thin sections were studied indicating that the Beaufort Group has mudstone, shale and fine-grained sandstone. The latter was dominant in the studied thin sections with 70 – 80 % quartz, 15 – 20 % groundmass, 5 – 10 % of feldspars, 2 – 5 % biotite, and some had vein like cracks filled with clay cement. Laboratory studies show average dry densities for the formations vary from 2.44 to 2.65 g/cm3, and porosities range from 1.6 to 4.0 %. Magnetic grid data obtained from the Council for Geoscience (CGS) were reduced to the pole, first vertical derivative and analytic signal maps were generated to delineate magnetic sources in the sediments. The magnetic anomalies showed lineaments and ring-shaped patterns that were interpreted to be due to Karoo dykes and sills, respectively. Some of these intrusions are mapped on the geological map and quite a number are not mapped as they are under sediment cover. The intrusions are important in groundwater exploration as they would have caused fracturing of surrounding formations causing increased secondary porosity and permeability. Further, they are groundwater localisers. Electrical resistivity tomography (ERT) was carried out at 12 selected sites using the dipoledipole and Wenner-Schlumberger arrays, with a maximum cable length of 360 m was used with an approximate maximum depth of investigation of 70 m. Most of the sites’ inverted models show a low resistivity top layer of about 10 m thickness, which is inferred to be topsoil with moisture/water and or clayey content. A high resistivity second layer underneath the top layer, and is interpreted to be slightly weathered sandstone at its top grading into compact sandstones at the bottom of the investigation depth. Four site results show models with an intermediate layer between the top and bottom layers consisting of moderate resistivity values due to mudstones. Most of the models have vertical, narrow, low resistivity zones extending from the surface to the bottom layer, interpreted as fracturing. The top layer could be an unconfined aquifer during the wet months but is likely to dry up during the dry, hot months. The inferred fractures that extend deeper from the surface could be good groundwater targets to drill boreholes. Dolerite intrusions can act as natural groundwater barriers depending on their orientation hence such structures are the main targets when searching for groundwater. Vegetation cover observed on satellite images of remote sensing can be used along with other techniques to explore for groundwater. It is recommended that future ERT surveys should measure both electrical resistivity and induced polarization chargeability to discriminate between water and clay influence. , Thesis (MSc) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-07
- Authors: Xanga, Sithule
- Date: 2021-07
- Subjects: Groundwater ecology , Geophysical instruments , Borehole gravimetry
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/22643 , vital:52616
- Description: The study area lies in the eastern portion of Raymond Mhlaba Local Municipality (RMLM), formerly known as Nkonkobe Local Municipality within the Eastern Cape Province of South Africa in the southeastern portion of the main Karoo Basin. Its northen part is mountainous with high altitude of about 1500 m with dense vegetation, whereas the southern part attains low altitude of about 600 m with sparse vegetation. The entire study area is covered on the surface by the Beaufort Group sediments comprised of three geological formations namely Middleton Formation, Balfour Formation members (Oudeberg, Daggaboersnek, Baberskrans, Elandsberg, and Pilangkloof), and the Katberg Formation. Karoo igneous bodies (dolerite dykes and sills) intruded the sediments causing fracturing. The area receives mean annual precipitation of about 54 mm. It is semi-arid to dry with insufficient surface water resources and hence the need for this research to explore for potential groundwater. Many techniques were employed to reveal the surface and subsurface geology, including groundwater potential areas using climate data, vegetation cover, borehole data analysis, geological field mapping, rock samples collection for petrographic analysis, a density-porosity determination, magnetic data analysis, and electrical resistivity tomography. The study area was divided into seven sub-regions, SR1 to SR7. The climate data showed that the area experiences high monthly average temperatures of about 21.6 °C during the summer, and is a semi-arid to dry region. Vegetation cover is dense in the mountainous northern part of the study area. It receives comparatively high rainfall, experiences less evapotranspiration than the southern part the low altitude, receives less rainfall, and has relatively high temperatures and evapotranspiration. A total of 385 boreholes from the Department Water and Sanitation were analysed and these showed that sub-regions SR1 up to SR7 had average borehole depths ranging from 51.9 to 67.7 m, water strike depths from 13.8 to 21.7 m and yields from 0.8 to 1.9 L/s. Sub-regions SR2, SR4, SR5, while SR7 have an average yield ≥ 1.4 L/s up to 1.9 L/s and are classified in this study as having a good or high groundwater yield potential. Fifteen thin sections were studied indicating that the Beaufort Group has mudstone, shale and fine-grained sandstone. The latter was dominant in the studied thin sections with 70 – 80 % quartz, 15 – 20 % groundmass, 5 – 10 % of feldspars, 2 – 5 % biotite, and some had vein like cracks filled with clay cement. Laboratory studies show average dry densities for the formations vary from 2.44 to 2.65 g/cm3, and porosities range from 1.6 to 4.0 %. Magnetic grid data obtained from the Council for Geoscience (CGS) were reduced to the pole, first vertical derivative and analytic signal maps were generated to delineate magnetic sources in the sediments. The magnetic anomalies showed lineaments and ring-shaped patterns that were interpreted to be due to Karoo dykes and sills, respectively. Some of these intrusions are mapped on the geological map and quite a number are not mapped as they are under sediment cover. The intrusions are important in groundwater exploration as they would have caused fracturing of surrounding formations causing increased secondary porosity and permeability. Further, they are groundwater localisers. Electrical resistivity tomography (ERT) was carried out at 12 selected sites using the dipoledipole and Wenner-Schlumberger arrays, with a maximum cable length of 360 m was used with an approximate maximum depth of investigation of 70 m. Most of the sites’ inverted models show a low resistivity top layer of about 10 m thickness, which is inferred to be topsoil with moisture/water and or clayey content. A high resistivity second layer underneath the top layer, and is interpreted to be slightly weathered sandstone at its top grading into compact sandstones at the bottom of the investigation depth. Four site results show models with an intermediate layer between the top and bottom layers consisting of moderate resistivity values due to mudstones. Most of the models have vertical, narrow, low resistivity zones extending from the surface to the bottom layer, interpreted as fracturing. The top layer could be an unconfined aquifer during the wet months but is likely to dry up during the dry, hot months. The inferred fractures that extend deeper from the surface could be good groundwater targets to drill boreholes. Dolerite intrusions can act as natural groundwater barriers depending on their orientation hence such structures are the main targets when searching for groundwater. Vegetation cover observed on satellite images of remote sensing can be used along with other techniques to explore for groundwater. It is recommended that future ERT surveys should measure both electrical resistivity and induced polarization chargeability to discriminate between water and clay influence. , Thesis (MSc) -- Faculty of Science and Agriculture, 2021
- Full Text:
- Date Issued: 2021-07
The synthesis of anastrazole intermediates using continuous flow systems
- Authors: Tanyi, Sam Tambi
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54116 , vital:46304
- Description: In this study, the continuous flow synthesis of anastrozole intermediates were investigated using mesitylene as starting material. Anastrozole is an important drug used for the treatment of breast cancer. In the first step, mesitylene was brominated using N-bromosuccinimide to obtain 3,5-bis(bromomethyl)toluene. Selectivity became an issue due to the formation of two by-products; namely 1,3,5-tris(bromomethyl) benzene (the tribrominated by-product) and 1-(bromomethyl)-3,5-dimethylbenzene (the monobrominated by-product). Since the reaction parameters can be more precisely controlled in flow chemistry systems, we were able to optimize the formation the desired product 3,5-bis(bromomethyl)toluene. The reaction was initially optimized ina 15μLChemtrix glass micro reactor resulting in 100%conversion with 95%selectivity towards the desired product 3,5-bis(bromomethyl)toluenein 15 seconds, with a throughput of 0.006 g/h. The reaction was then scaled up in a 1.7 mLLTF reactor, equally yielding 100%conversion with 95%selectivityin 4minutes, with a throughput of2.01g/h. The bromination of mesitylene was also attempted in a homemade photochemical reactor consisting of a 3.02 polytetrafluoroethylene coil reactor and BLE-6T365 UV lamp. In this photochemical reactor, although 100%conversionwas again obtained only75%selectivity was achieved in 20minutes, with a throughput of 0.025g/h. This drop in selectivity was attributed to poorer mixing in the larger polytetrafluoroethylene coil reactor and possibly insufficient light penetration. The next step, involving the cyanation of 3,5-bis(bromomethyl)toluene to obtain 2,2'-(5-methyl-1,3-phenylene) diacetonitrilegave 100%conversion in 1 minute at 190 °C in a 1.7 mLLTFreactor, with a throughput of 5.2g/h. The subsequent methylation of 3,5-bis(cyanomethyl)toluene to obtain3,5-bis(1-cyano-1-methylethyl) toluene was investigated using a1mLpolytetrafluoroethylenecoil reactor, ultimatelyachieving99%conversionat40 °Cin 8minutes, with a throughput of 0.045g/h. Next, the bromination of3,5-bis(1-cyano-1-methylethyl)toluene using N-bromosuccinimideto yield 2,2'-(5-bromomethyl-1,3-phenylene)di(2-methyl propionitrile) gave 100%conversion at 120 °C in 4 minutes, with a throughput of 0.35g/h. Lastly, the multistep synthesis of 3,5-bis(cyanomethyl)toluene was done in two integrated 1.7 mLLTF reactors, using the predetermined optimum conditions to achieve 94%conversion towards 3,5-bis(cyanomethyl)toluene with a total r , Thesis (MSc) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Tanyi, Sam Tambi
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54116 , vital:46304
- Description: In this study, the continuous flow synthesis of anastrozole intermediates were investigated using mesitylene as starting material. Anastrozole is an important drug used for the treatment of breast cancer. In the first step, mesitylene was brominated using N-bromosuccinimide to obtain 3,5-bis(bromomethyl)toluene. Selectivity became an issue due to the formation of two by-products; namely 1,3,5-tris(bromomethyl) benzene (the tribrominated by-product) and 1-(bromomethyl)-3,5-dimethylbenzene (the monobrominated by-product). Since the reaction parameters can be more precisely controlled in flow chemistry systems, we were able to optimize the formation the desired product 3,5-bis(bromomethyl)toluene. The reaction was initially optimized ina 15μLChemtrix glass micro reactor resulting in 100%conversion with 95%selectivity towards the desired product 3,5-bis(bromomethyl)toluenein 15 seconds, with a throughput of 0.006 g/h. The reaction was then scaled up in a 1.7 mLLTF reactor, equally yielding 100%conversion with 95%selectivityin 4minutes, with a throughput of2.01g/h. The bromination of mesitylene was also attempted in a homemade photochemical reactor consisting of a 3.02 polytetrafluoroethylene coil reactor and BLE-6T365 UV lamp. In this photochemical reactor, although 100%conversionwas again obtained only75%selectivity was achieved in 20minutes, with a throughput of 0.025g/h. This drop in selectivity was attributed to poorer mixing in the larger polytetrafluoroethylene coil reactor and possibly insufficient light penetration. The next step, involving the cyanation of 3,5-bis(bromomethyl)toluene to obtain 2,2'-(5-methyl-1,3-phenylene) diacetonitrilegave 100%conversion in 1 minute at 190 °C in a 1.7 mLLTFreactor, with a throughput of 5.2g/h. The subsequent methylation of 3,5-bis(cyanomethyl)toluene to obtain3,5-bis(1-cyano-1-methylethyl) toluene was investigated using a1mLpolytetrafluoroethylenecoil reactor, ultimatelyachieving99%conversionat40 °Cin 8minutes, with a throughput of 0.045g/h. Next, the bromination of3,5-bis(1-cyano-1-methylethyl)toluene using N-bromosuccinimideto yield 2,2'-(5-bromomethyl-1,3-phenylene)di(2-methyl propionitrile) gave 100%conversion at 120 °C in 4 minutes, with a throughput of 0.35g/h. Lastly, the multistep synthesis of 3,5-bis(cyanomethyl)toluene was done in two integrated 1.7 mLLTF reactors, using the predetermined optimum conditions to achieve 94%conversion towards 3,5-bis(cyanomethyl)toluene with a total r , Thesis (MSc) -- Faculty of Science, School of Biomolecular and Chemical Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Upwelling over submarine canyons: an in-situ and modelling approach
- Authors: Rautenbach, Gustav
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Oceanography -- Research -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52078 , vital:43442
- Description: The iSimangaliso Wetland Park, located along the coastline of northern KwaZulu-Natal (KZN), hosts South Africa's only tropical coral reef system and is clustered with submarine canyons. These ecosystems support a flourishing diving and pelagic sportfishing industry in the area that contributes tens of millions of rand to the South African Gross Domestic Profit (GDP) annually as well as to provide income and job security for the majority of the local residents. Understanding the oceanographic dynamics, particularly upwelling events, will improve current knowledge of how the ecosystem works and may enhance conservation techniques. The upwelling events within the iSimangaliso Wetland Park results in the influx of cold and nutrient rich waters that supports biological productivity in the area. The complex oceanography, dominated by the Northern Agulhas Current and mesoscale eddies that stem from the Mozambique Channel and South East Madagascar Current (SEMC) is understudied and lacks understanding. This thesis aims to build upon the current knowledge of the upwelling events over the submarine canyons and the concurrent influence on the Mixed Layer Depth (MLD). At the submarine canyons, six anomalous cooling events were identified from surface and subsurface measurements extracted from the Operational Sea Surface Temperature and Ice Analysis (OSTIA) Sea Surface Temperature (SST) and from data collected using Underwater Temperature Recorders (UTRs) over a 12-month period. Depth-integrated lagged correlations showed a 2-to-7-hour lag period from the deep to shallow stations, suggesting that the anomalous cooling events are in fact upwelling events. Wind measurements from the Mbazwana Weather Station and snapshots of sea-level anomalies illustrated that the weaker and shorter upwelling events are driven either by alongshore wind stress or a cyclonic eddy event solely; whereas the stronger event was driven by the combination of both forcing mechanisms. An idealized canyon ocean model is used to interrogate the two forcing mechanisms more fully and showed that the most intense upwelling events are driven by the combined effect of upwelling-favourable alongshore wind stress and a cyclonic eddy which results in strong upward vertical velocity anomalies and the greatest shallowing (6.88 m) of the MLD. With the contribution of the in-situ measurements as a baseline study it is apparent that the idealised model does provide an improved understanding of the upwelling events and forcing mechanism over the submarine canyons within the iSimangaliso Wetland Park. , Thesis (MSc) -- Faculty of Science, Ocean Sciences, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Rautenbach, Gustav
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Oceanography -- Research -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52078 , vital:43442
- Description: The iSimangaliso Wetland Park, located along the coastline of northern KwaZulu-Natal (KZN), hosts South Africa's only tropical coral reef system and is clustered with submarine canyons. These ecosystems support a flourishing diving and pelagic sportfishing industry in the area that contributes tens of millions of rand to the South African Gross Domestic Profit (GDP) annually as well as to provide income and job security for the majority of the local residents. Understanding the oceanographic dynamics, particularly upwelling events, will improve current knowledge of how the ecosystem works and may enhance conservation techniques. The upwelling events within the iSimangaliso Wetland Park results in the influx of cold and nutrient rich waters that supports biological productivity in the area. The complex oceanography, dominated by the Northern Agulhas Current and mesoscale eddies that stem from the Mozambique Channel and South East Madagascar Current (SEMC) is understudied and lacks understanding. This thesis aims to build upon the current knowledge of the upwelling events over the submarine canyons and the concurrent influence on the Mixed Layer Depth (MLD). At the submarine canyons, six anomalous cooling events were identified from surface and subsurface measurements extracted from the Operational Sea Surface Temperature and Ice Analysis (OSTIA) Sea Surface Temperature (SST) and from data collected using Underwater Temperature Recorders (UTRs) over a 12-month period. Depth-integrated lagged correlations showed a 2-to-7-hour lag period from the deep to shallow stations, suggesting that the anomalous cooling events are in fact upwelling events. Wind measurements from the Mbazwana Weather Station and snapshots of sea-level anomalies illustrated that the weaker and shorter upwelling events are driven either by alongshore wind stress or a cyclonic eddy event solely; whereas the stronger event was driven by the combination of both forcing mechanisms. An idealized canyon ocean model is used to interrogate the two forcing mechanisms more fully and showed that the most intense upwelling events are driven by the combined effect of upwelling-favourable alongshore wind stress and a cyclonic eddy which results in strong upward vertical velocity anomalies and the greatest shallowing (6.88 m) of the MLD. With the contribution of the in-situ measurements as a baseline study it is apparent that the idealised model does provide an improved understanding of the upwelling events and forcing mechanism over the submarine canyons within the iSimangaliso Wetland Park. , Thesis (MSc) -- Faculty of Science, Ocean Sciences, 2021
- Full Text: false
- Date Issued: 2021-04
Assessing the implementation of primary agriculture in one Technical and Vocational Education and Training College in the Eastern Cape Province
- Authors: Mtshabe, Siyabonga
- Date: 2016-01
- Subjects: Technical education -- Curricula -- South Africa -- Eastern Cape , Vocational education -- Curricula -- South Africa -- Eastern Cape
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26604 , vital:65662
- Description: Implementing the Primary Agriculture curriculum has been a matter of concern for South African TVET colleges due to the high number of students who fail to complete the programmes. This study assessed how Primary Agriculture curriculum is implemented in one rural based TVET college in the in the Eastern Cape Province in South Africa. The study specifically sought to 1) determine the resources available for teaching primary agriculture, 2) teaching approaches adopted by the lecturers, 3) professional skills of staff and 4) how the curriculum was monitored. The study adopted a qualitative approach and case study design of one rural based TVET College. All participants who took part in the study were purposively selected. Data were collected through document analysis of policy and curriculum documents, face-to-face in-depth interviews with 6 college managers and 6 primary agriculture lecturers. Also 20 learners from different academic levels participated in focus group discussions. Findings of the study revealed that there were inadequate teaching and learning resources and this negatively influenced the practical learning aspect of the curriculum. Inadequate resources were caused by delayed procurement processes as well as funding constraints. Students were sent to neighbouring farms and institutions for practical work to curb resource limitations. This caused learning deficiencies as student resource ratios were high thus forcing some students to observe rather than do practical. The study also found limited lecturer professional capacity in pedagogy negatively influenced curriculum delivery. While all the lecturers possessed tertiary qualifications in related fields in agriculture, the majority lacked professional teaching qualifications and pedagogical competences, thus struggled to be creative in using diverse teaching methods to enhance students’ learning outcomes. Even though some staff had to undergo Assessor and Moderator training paid by the college, as part of professional development, this staff development approach was viewed by lecturers as inadequate to improve primary agriculture curriculum implementation. The study also found that curriculum support structures in the college took many forms such as literature or materials on Subject Guidelines, Integrated Summative Assessment Task (ISAT), Internal Continuous Assessment Guidelines, textbooks and sometimes funds to take learners out on field and moderation of students work. The study found that monitoring of the curriculum implementation was weak because various errors made by lecturers in their lesson planning and students Portfolios of Assessment went uncorrected despite it being expressly stated by the moderators that corrections had to be made. The study recommends strengthening partnerships between TVET colleges and the private sector businesses and other public institutions such as the Sector Education and Training Authorities so as to improve the quantity and quality of learning resources and exposure of both staff and students. Also there is need to ensure speedy procurement and delivery of learning resources. In addition, Workplace-Based Exposures (WBE) for lecturers could enhance knowledge on developments of the industry so as to align their teaching methods emerging industry needs. The Department of Higher Education and training could consider fast-tracking strategies to enhance professional capacity of lecturers to allow them to effectively deliver the primary agriculture curriculum. , Thesis (M.Ed) -- Faculty of Education, 2016
- Full Text:
- Date Issued: 2016-01
- Authors: Mtshabe, Siyabonga
- Date: 2016-01
- Subjects: Technical education -- Curricula -- South Africa -- Eastern Cape , Vocational education -- Curricula -- South Africa -- Eastern Cape
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26604 , vital:65662
- Description: Implementing the Primary Agriculture curriculum has been a matter of concern for South African TVET colleges due to the high number of students who fail to complete the programmes. This study assessed how Primary Agriculture curriculum is implemented in one rural based TVET college in the in the Eastern Cape Province in South Africa. The study specifically sought to 1) determine the resources available for teaching primary agriculture, 2) teaching approaches adopted by the lecturers, 3) professional skills of staff and 4) how the curriculum was monitored. The study adopted a qualitative approach and case study design of one rural based TVET College. All participants who took part in the study were purposively selected. Data were collected through document analysis of policy and curriculum documents, face-to-face in-depth interviews with 6 college managers and 6 primary agriculture lecturers. Also 20 learners from different academic levels participated in focus group discussions. Findings of the study revealed that there were inadequate teaching and learning resources and this negatively influenced the practical learning aspect of the curriculum. Inadequate resources were caused by delayed procurement processes as well as funding constraints. Students were sent to neighbouring farms and institutions for practical work to curb resource limitations. This caused learning deficiencies as student resource ratios were high thus forcing some students to observe rather than do practical. The study also found limited lecturer professional capacity in pedagogy negatively influenced curriculum delivery. While all the lecturers possessed tertiary qualifications in related fields in agriculture, the majority lacked professional teaching qualifications and pedagogical competences, thus struggled to be creative in using diverse teaching methods to enhance students’ learning outcomes. Even though some staff had to undergo Assessor and Moderator training paid by the college, as part of professional development, this staff development approach was viewed by lecturers as inadequate to improve primary agriculture curriculum implementation. The study also found that curriculum support structures in the college took many forms such as literature or materials on Subject Guidelines, Integrated Summative Assessment Task (ISAT), Internal Continuous Assessment Guidelines, textbooks and sometimes funds to take learners out on field and moderation of students work. The study found that monitoring of the curriculum implementation was weak because various errors made by lecturers in their lesson planning and students Portfolios of Assessment went uncorrected despite it being expressly stated by the moderators that corrections had to be made. The study recommends strengthening partnerships between TVET colleges and the private sector businesses and other public institutions such as the Sector Education and Training Authorities so as to improve the quantity and quality of learning resources and exposure of both staff and students. Also there is need to ensure speedy procurement and delivery of learning resources. In addition, Workplace-Based Exposures (WBE) for lecturers could enhance knowledge on developments of the industry so as to align their teaching methods emerging industry needs. The Department of Higher Education and training could consider fast-tracking strategies to enhance professional capacity of lecturers to allow them to effectively deliver the primary agriculture curriculum. , Thesis (M.Ed) -- Faculty of Education, 2016
- Full Text:
- Date Issued: 2016-01
The experiences of students with a physical disability at institutions of higher learning: a systematic review
- Makubalo, Siphokazi https://orcid.org/0000-0001-8596-7357
- Authors: Makubalo, Siphokazi https://orcid.org/0000-0001-8596-7357
- Date: 2022-11
- Subjects: People with disabilities -- Education (Higher) , People with disabilities in higher education , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27242 , vital:66484
- Description: This study aims to explore the experiences of physically disabled students at institutions of higher. The research methodology followed in conducting this study is a systematic review. Thus, published literature from the period of 2000-2020 on the experiences of physically disabled students in South African institutions of higher learning was reviewed. Five articles which met the inclusion criteria were assessed for eligibility using the CASP criteria. The social model of disability is applied as a theoretical framework in exploring these experiences. A synthesis of results and findings of South African studies relating to physically disabled students in institutions of higher learning is provided. Themes that emerged in the study indicate that physically disabled students experience social exclusion related to architectural access barriers, attitudinal barriers, lack of support and discrimination in South African Institutions of higher learning, which impacts their overall physical access in these institutions. The study found that addressing these challenges and access barriers would result in positive experiences for physically disabled students on campuses. The study concluded that to improve the experiences of physically disabled students, institutional effort is necessary that is extensive both in scope and systematic in nature. For future studies, it is recommended that a qualitative study explore not just disabled students‟ lived experiences but also be inclusive of academic and support staffs‟ perceptions. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2022
- Full Text:
- Date Issued: 2022-11
- Authors: Makubalo, Siphokazi https://orcid.org/0000-0001-8596-7357
- Date: 2022-11
- Subjects: People with disabilities -- Education (Higher) , People with disabilities in higher education , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27242 , vital:66484
- Description: This study aims to explore the experiences of physically disabled students at institutions of higher. The research methodology followed in conducting this study is a systematic review. Thus, published literature from the period of 2000-2020 on the experiences of physically disabled students in South African institutions of higher learning was reviewed. Five articles which met the inclusion criteria were assessed for eligibility using the CASP criteria. The social model of disability is applied as a theoretical framework in exploring these experiences. A synthesis of results and findings of South African studies relating to physically disabled students in institutions of higher learning is provided. Themes that emerged in the study indicate that physically disabled students experience social exclusion related to architectural access barriers, attitudinal barriers, lack of support and discrimination in South African Institutions of higher learning, which impacts their overall physical access in these institutions. The study found that addressing these challenges and access barriers would result in positive experiences for physically disabled students on campuses. The study concluded that to improve the experiences of physically disabled students, institutional effort is necessary that is extensive both in scope and systematic in nature. For future studies, it is recommended that a qualitative study explore not just disabled students‟ lived experiences but also be inclusive of academic and support staffs‟ perceptions. , Thesis (MSoc) -- Faculty of Social Sciences and Humanities, 2022
- Full Text:
- Date Issued: 2022-11
Perceptions of Kwazulu-Natal radiographers regarding the role of professional development in clinical practice
- Authors: Zulu Anelisa
- Date: 2022-12
- Subjects: Radiography -- KwaZulu Natal , radiographers regarding
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60290 , vital:64292
- Description: Professional development in the form of continuing education is associated with professional competence and good service delivery to the patient, and this understanding of professional development applies to the radiography profession. A manager may prompt participation in professional development, or the needs of a radiography department may influence it, or it may be driven by the personal and professional ambitions of the radiographer. Participation could also be due to regulatory body requirements, which require tracking and documentation as in the case of the Health Professions Council of South Africa (HPCSA) which may audit the professional’s continuing professional development (CPD) compliance. Professional development is a concept inclusive of all learning such as CPD; postgraduate qualifications; staff development; and reflective practice, pursued for the betterment of the radiographers’ professional expertise. Few if any qualitative studies have sought to explore South African radiographers’ perceptions of professional development as a concept inclusive of all learning. The purpose of the study was to explore and describe the perceptions of KwaZulu-Natal radiographers regarding the role of professional development in clinical practice to make recommendations to radiography managers on how to optimise the participation of radiographers in professional development. Bandura’s social learning theory was used as the theoretical framework for a study of the perceptions of practising KZN radiographers regarding the role of professional development in clinical practice and exploring how people learn from one another, including concepts such as observational learning, imitation, and modelling. The target population for the study consisted of practising radiographers working in the public and private, rural and urban hospitals in KZN. Data were gathered using semi-structured one-on-one interviews and were coded using Tesch’s eight steps. The trustworthiness of this study was enhanced using Lincoln and Guba’s (1985) model of trustworthiness, namely: credibility, transferability, dependability and confirmability. , Thesis (MA) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Zulu Anelisa
- Date: 2022-12
- Subjects: Radiography -- KwaZulu Natal , radiographers regarding
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60290 , vital:64292
- Description: Professional development in the form of continuing education is associated with professional competence and good service delivery to the patient, and this understanding of professional development applies to the radiography profession. A manager may prompt participation in professional development, or the needs of a radiography department may influence it, or it may be driven by the personal and professional ambitions of the radiographer. Participation could also be due to regulatory body requirements, which require tracking and documentation as in the case of the Health Professions Council of South Africa (HPCSA) which may audit the professional’s continuing professional development (CPD) compliance. Professional development is a concept inclusive of all learning such as CPD; postgraduate qualifications; staff development; and reflective practice, pursued for the betterment of the radiographers’ professional expertise. Few if any qualitative studies have sought to explore South African radiographers’ perceptions of professional development as a concept inclusive of all learning. The purpose of the study was to explore and describe the perceptions of KwaZulu-Natal radiographers regarding the role of professional development in clinical practice to make recommendations to radiography managers on how to optimise the participation of radiographers in professional development. Bandura’s social learning theory was used as the theoretical framework for a study of the perceptions of practising KZN radiographers regarding the role of professional development in clinical practice and exploring how people learn from one another, including concepts such as observational learning, imitation, and modelling. The target population for the study consisted of practising radiographers working in the public and private, rural and urban hospitals in KZN. Data were gathered using semi-structured one-on-one interviews and were coded using Tesch’s eight steps. The trustworthiness of this study was enhanced using Lincoln and Guba’s (1985) model of trustworthiness, namely: credibility, transferability, dependability and confirmability. , Thesis (MA) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-12
An investigation into water and sanitation in the Eastern Cape Province and potential for implementation of biotechnology platforms
- Authors: Gumunyu, Wilbert
- Date: 2022-10-14
- Subjects: Sewage South Africa Eastern Cape , Sanitation South Africa Eastern Cape , Algae Biotechnology , Biotechnology , Sewage Purification Biological treatment , Algal biofuels
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/362830 , vital:65366
- Description: In contemporary South Africa, a country in transition, destruction rather than reconstruction seems commonplace. Electricity supply is at an all-time low and ‘load shedding’ is an almost daily occurrence. Similarly, more fragility of water delivery and sanitation service is being reported with the likelihood of ‘water shedding’ a soon-to-be reality. In view of the ever-increasing reported mismanagement of South Africa’s water and sanitation infrastructure, which is likely nearing the point of collapse if not already collapsed, this thesis set out to interrogate at a provincial and municipal level the status of water and sanitation in Chris Hani District Municipality (CHDM), Eastern Cape Province. One major driver behind this study was to evaluate provincial and municipal water/wastewater infrastructure as a platform to support implementation of locally developed bioprocess technologies. First, publicly available historical data was used to derive a baseline or benchmark from which to determine gains/losses in compliance, water quality and efficiency. The period 2009-2013/4 during which Blue and Green Drop reporting was routine, was used as an appropriate start point. Data thus derived indicated that, at provincial and district municipality (DM) level, potable water supply was by bulk water schemes and, sanitation was typically by waste stabilization pond (WSP) treatment of municipal sewage. The derived benchmark for the period 2009-2013/14 indicated that most plants were not compliant (~75% of the Eastern Cape Province water treatment plants (WTP) operating between average performance to critical state), operated either at- or above design capacity (Eastern Cape Province, 16%; CHDM, 19%). A large number of plants for the province (62.4%) and district (81.25%) had hydraulic design capacity or average daily flows that were unknown (information not provided in available literature or plant reports) and final effluent did not always meet the general standard (70.3% of the CHDM wastewater treatment works (WWTW)). To determine the contemporary state (2020 - 2022) of water and sanitation within CHDM, a scoping exercise of WTP and WWTW in selected local municipalities was carried out. This was done along a west-east transect by appraising WTP and WWTW in the towns of Cradock, Tarkastad, Komani, Tsomo, Cacadu, and Ngcobo. Furthermore, targeted assessment of the Queenstown WTP and the Cradock WWTW was used to derive real-time data on the status of water and sanitation infrastructure. Results showed that water and sanitation services within CHDM had, in the years between 2009-2013/14 to date, deteriorated. Freshwater demand significantly exceeded capability of water supply schemes, where demand was as much as three times greater than reported available supply. For most WWTW, operation was in excess of capacity and between 1.52 and 12 times installed hydraulic loading. The targeted scoping exercise revealed that Queenstown WTP is a moderate risk plant (Cumulative risk rating, CRR = 11 and maximum risk rating, MRR = 47.8%), whereas Cradock WWTW was in working condition but with challenges and some infrastructural dysfunction. Assessment of water/effluent quality revealed that turbidity and TOC were above SANS 241 general limit. Non-compliance in terms of nitrate/nitrite-N, ammonium-N, phosphate-P, TSS, total coliforms, E. Coli, and free chlorine was evident at Cradock WWTW. Unstructured interviews with plant operators corroborated these findings. The overwhelming support for bulk schemes for potable water provision and WSP for sanitation indicated a partially water secure municipal district but derelict in terms of its sanitation services. The later, it was concluded, in particular provides an ideal opportunity for implementation of platform technologies to support bioprocesses for entrepreneurship, employment, economic benefit and to secure a closed circular economy for regional water and sanitation through valorisation of co-product streams. Among the co-product streams considered in this thesis are biomass, biogas, biofertilizers, biofuels and several high value chemical products. , Thesis (MSc) -- Faculty of Science, Institute for Environmental Biotechnology, 2022
- Full Text:
- Date Issued: 2022-10-14
- Authors: Gumunyu, Wilbert
- Date: 2022-10-14
- Subjects: Sewage South Africa Eastern Cape , Sanitation South Africa Eastern Cape , Algae Biotechnology , Biotechnology , Sewage Purification Biological treatment , Algal biofuels
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/362830 , vital:65366
- Description: In contemporary South Africa, a country in transition, destruction rather than reconstruction seems commonplace. Electricity supply is at an all-time low and ‘load shedding’ is an almost daily occurrence. Similarly, more fragility of water delivery and sanitation service is being reported with the likelihood of ‘water shedding’ a soon-to-be reality. In view of the ever-increasing reported mismanagement of South Africa’s water and sanitation infrastructure, which is likely nearing the point of collapse if not already collapsed, this thesis set out to interrogate at a provincial and municipal level the status of water and sanitation in Chris Hani District Municipality (CHDM), Eastern Cape Province. One major driver behind this study was to evaluate provincial and municipal water/wastewater infrastructure as a platform to support implementation of locally developed bioprocess technologies. First, publicly available historical data was used to derive a baseline or benchmark from which to determine gains/losses in compliance, water quality and efficiency. The period 2009-2013/4 during which Blue and Green Drop reporting was routine, was used as an appropriate start point. Data thus derived indicated that, at provincial and district municipality (DM) level, potable water supply was by bulk water schemes and, sanitation was typically by waste stabilization pond (WSP) treatment of municipal sewage. The derived benchmark for the period 2009-2013/14 indicated that most plants were not compliant (~75% of the Eastern Cape Province water treatment plants (WTP) operating between average performance to critical state), operated either at- or above design capacity (Eastern Cape Province, 16%; CHDM, 19%). A large number of plants for the province (62.4%) and district (81.25%) had hydraulic design capacity or average daily flows that were unknown (information not provided in available literature or plant reports) and final effluent did not always meet the general standard (70.3% of the CHDM wastewater treatment works (WWTW)). To determine the contemporary state (2020 - 2022) of water and sanitation within CHDM, a scoping exercise of WTP and WWTW in selected local municipalities was carried out. This was done along a west-east transect by appraising WTP and WWTW in the towns of Cradock, Tarkastad, Komani, Tsomo, Cacadu, and Ngcobo. Furthermore, targeted assessment of the Queenstown WTP and the Cradock WWTW was used to derive real-time data on the status of water and sanitation infrastructure. Results showed that water and sanitation services within CHDM had, in the years between 2009-2013/14 to date, deteriorated. Freshwater demand significantly exceeded capability of water supply schemes, where demand was as much as three times greater than reported available supply. For most WWTW, operation was in excess of capacity and between 1.52 and 12 times installed hydraulic loading. The targeted scoping exercise revealed that Queenstown WTP is a moderate risk plant (Cumulative risk rating, CRR = 11 and maximum risk rating, MRR = 47.8%), whereas Cradock WWTW was in working condition but with challenges and some infrastructural dysfunction. Assessment of water/effluent quality revealed that turbidity and TOC were above SANS 241 general limit. Non-compliance in terms of nitrate/nitrite-N, ammonium-N, phosphate-P, TSS, total coliforms, E. Coli, and free chlorine was evident at Cradock WWTW. Unstructured interviews with plant operators corroborated these findings. The overwhelming support for bulk schemes for potable water provision and WSP for sanitation indicated a partially water secure municipal district but derelict in terms of its sanitation services. The later, it was concluded, in particular provides an ideal opportunity for implementation of platform technologies to support bioprocesses for entrepreneurship, employment, economic benefit and to secure a closed circular economy for regional water and sanitation through valorisation of co-product streams. Among the co-product streams considered in this thesis are biomass, biogas, biofertilizers, biofuels and several high value chemical products. , Thesis (MSc) -- Faculty of Science, Institute for Environmental Biotechnology, 2022
- Full Text:
- Date Issued: 2022-10-14
Low uptake and early removal of Implanon NXT among women of reproductive age in Limpopo
- Magomani, Nandu Victoria https://orcid.org/ 0000-0001-5473-9984
- Authors: Magomani, Nandu Victoria https://orcid.org/ 0000-0001-5473-9984
- Date: 2021-11
- Subjects: Contraceptive drug implants
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/21849 , vital:51829
- Description: Implanon NXT also referred to as subdermal Implant, is a long-acting subdermal contraceptive method available in the South African public health care system since 2014. The implant was introduced to broaden the choice for women of childbearing age to delay or prevent unwanted pregnancies. Following a surge in popularity, reports of early removals and frequent adverse effects led to a significant decrease in its uptake in the country. Insufficient knowledge on Implanon, poor management of side effects, poor counseling by health care workers, and lack of partner support were the main themes that were picked from the interview, influencing uptake or early removals of the Implanon. The major concerning side effect reported was uncontrolled and irregular heavy bleeding The purpose of the study was to explore the factors associated with low uptake and early removals of Implanon NXT among women of reproductive age in one district in Limpopo province. A qualitative research design was used, primarily as exploratory and descriptive in nature. Participants were identified using non-probable, purposeful voluntary sampling. Data collection was achieved using open-ended structured interviews with sixteen (16) women aged from18-49. Data was analysed using thematic method of organizing data into categories, followed by coding and sorting the data to identify patterns and interpret the meanings and responses. An independent consultant was involved to confirm the thematic areas identified after which consensus discussions took place to finalize the analysed data. From the results, it appeared that there was a need that Implanon should be marketed by use of digital platforms and print media for information sharing. These platforms should be utilized by DOH from the National, provincial, district, facility and community levels. There should be clear protocol on how to manage different kinds of side effects, and this information should be rolled out to the implementation level. Health Care workers should provide client education and counselling services to the clients about the effectiveness of the method. Male partner involvement is crucial to provide support for women on contraceptives and to support their contraceptive choices. Mentorship will help providers to attain their proficiency in Implanon counselling, insertions, and removals. Lastly, availing adequate and effective youth-friendly services to enable young people to open up more about challenges and options that can be explored. For the adolescents and youth, these services should be provided by trained providers not at the general unit, where there is a mixture of adult population and the elderly, but at youth zones to enhance the uptake of Implanon NXT. Recommendations are for clinical practice area, for generic student education as well as for further research. The conclusions confirm that the government need to revitalise the Implanon program, to drive the uptake and reduce early removals. Training of health workers and mentorship should emphasize more comprehensive counselling, provide adequate information on what is to be expected and more importantly, how to treat and manage the side effects. That early removals due to side effects become the last option as information need to be widely available to all users utilising the traditional methods and modern methods such as digital platforms to spread the correct information and create demand for the Implanon. The functional service-provision-based youth-friendly services which will cater for the needs of young women and adolescents is highlighted as it provides a comfortable and conducive environment to provide and receive a comprehensive sexual reproductive health and rights services. , Thesis (MPH) -- Faculty of Health Sciences, 2021
- Full Text:
- Date Issued: 2021-11
- Authors: Magomani, Nandu Victoria https://orcid.org/ 0000-0001-5473-9984
- Date: 2021-11
- Subjects: Contraceptive drug implants
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/21849 , vital:51829
- Description: Implanon NXT also referred to as subdermal Implant, is a long-acting subdermal contraceptive method available in the South African public health care system since 2014. The implant was introduced to broaden the choice for women of childbearing age to delay or prevent unwanted pregnancies. Following a surge in popularity, reports of early removals and frequent adverse effects led to a significant decrease in its uptake in the country. Insufficient knowledge on Implanon, poor management of side effects, poor counseling by health care workers, and lack of partner support were the main themes that were picked from the interview, influencing uptake or early removals of the Implanon. The major concerning side effect reported was uncontrolled and irregular heavy bleeding The purpose of the study was to explore the factors associated with low uptake and early removals of Implanon NXT among women of reproductive age in one district in Limpopo province. A qualitative research design was used, primarily as exploratory and descriptive in nature. Participants were identified using non-probable, purposeful voluntary sampling. Data collection was achieved using open-ended structured interviews with sixteen (16) women aged from18-49. Data was analysed using thematic method of organizing data into categories, followed by coding and sorting the data to identify patterns and interpret the meanings and responses. An independent consultant was involved to confirm the thematic areas identified after which consensus discussions took place to finalize the analysed data. From the results, it appeared that there was a need that Implanon should be marketed by use of digital platforms and print media for information sharing. These platforms should be utilized by DOH from the National, provincial, district, facility and community levels. There should be clear protocol on how to manage different kinds of side effects, and this information should be rolled out to the implementation level. Health Care workers should provide client education and counselling services to the clients about the effectiveness of the method. Male partner involvement is crucial to provide support for women on contraceptives and to support their contraceptive choices. Mentorship will help providers to attain their proficiency in Implanon counselling, insertions, and removals. Lastly, availing adequate and effective youth-friendly services to enable young people to open up more about challenges and options that can be explored. For the adolescents and youth, these services should be provided by trained providers not at the general unit, where there is a mixture of adult population and the elderly, but at youth zones to enhance the uptake of Implanon NXT. Recommendations are for clinical practice area, for generic student education as well as for further research. The conclusions confirm that the government need to revitalise the Implanon program, to drive the uptake and reduce early removals. Training of health workers and mentorship should emphasize more comprehensive counselling, provide adequate information on what is to be expected and more importantly, how to treat and manage the side effects. That early removals due to side effects become the last option as information need to be widely available to all users utilising the traditional methods and modern methods such as digital platforms to spread the correct information and create demand for the Implanon. The functional service-provision-based youth-friendly services which will cater for the needs of young women and adolescents is highlighted as it provides a comfortable and conducive environment to provide and receive a comprehensive sexual reproductive health and rights services. , Thesis (MPH) -- Faculty of Health Sciences, 2021
- Full Text:
- Date Issued: 2021-11
Tetra 4-(propargyloxy)phenoxy phthalocyanines: synthesis, spectroscopic, nonlinear optical and electrocatalytic properties
- Authors: Mwanza, Daniel
- Date: 2017
- Subjects: Phthalocyanines , Nonlinear optics , Electrocatalysis , Spectrum analysis , Thermogravimetry , Phthalocyanines Spectra
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/65144 , vital:28695
- Description: This study presents the synthesis, spectroscopic, photophysical and theoretical characterisation of metal-free (H2TPrOPhOPc), cobalt (CoTPrOPhOPc) and manganese (MnTPrOPhOPc) tetra 4-(4-propargyloxy) phenoxy phthalocyanines. Thermal analysis using thermogravimetric analysis (TGA) confirmed the excellent thermal stability of synthesized tetra 4-(4- propargyloxy) phenoxy phthalocyanines. The metal complexes, CoTPrOPhOPc and MnTPrOPhOPc, exhibited better thermal stability when compared to H2TPrOPhOPc. The residual percentage weight remaining was approximately 70% for CoTPrOPhOPc and MnTPrOPhOPc and 45% for H2TPrOPhOPc after 600°C, clearly confirming the stability of the metal complexes. The MTPrOPhOPcs (where M = H2, Co and Mn) complexes exhibited excellent nonlinear optical properties with strong reverse saturable absorption (RSA), especially when 560 nm excitation laser was used. Their nonlinear optical properties followed this trend: H2TPrOPhOPc > CoTPrOPhOPc > MnTPrOPhOPc. According to the trend observed, the H2TPrOPhOPc was an excellent nonlinear optical limiter when compared to the CoTPrOPhOPc and MnTPrOPhOPc. All the investigated complexes exhibited optical limiting properties comparable to the phthalocyanine complexes reported in the literature. The MTPrOPhOPc complexes were further studied for their electrocatalytic and electroanalytical properties towards the detection of hydrogen peroxide. For the electrocatalytic studies, the synthesized complexes were immobilized onto gold electrode surfaces pre-functionalized with phenylazide (Au-PAz) monolayer. Copper (I) catalyzed alkynyl-azide cycloaddition reaction was used to covalently immobilize the MTPrOPhOPcs onto the gold electrode surfaces to form Au-PAz-MTPrOPhOPc. The MTPrOPhOPcs modified gold surfaces (Au-PAz-MTPrOPhOPc) exhibited good reproducibility and stability in various electrolyte conditions. Electrochemical and surface characterisation of the functionalised gold electrode surfaces confirmed the presence of the MTPrOPhOPcs and their electroanalysis was excellent towards electrocatalytic reduction of H2O2, with the limit of detection (LoD) and limit of quantification (LoQ) in the ^M range. The electrocatalytic reduction peaks for H2O2 were observed at -0.37 V for Au-PAz-MnTPrOPhOPc and -0.31 V for Au-PAz-CoTPrOPhOPc when Ag|AgCl pseudo-reference electrode was used. The Au-PAz-MnTPrOPhOPc and Au- PAz-CoTPrOPhOPc gold electrode surfaces showed good sensitivity and reproducibility towards the electrocatalytic reduction of hydrogen peroxide in pH 7.4 phosphate buffer solution. , Thesis (MSc) -- Faculty of Science, Chemistry, 2017
- Full Text:
- Date Issued: 2017
- Authors: Mwanza, Daniel
- Date: 2017
- Subjects: Phthalocyanines , Nonlinear optics , Electrocatalysis , Spectrum analysis , Thermogravimetry , Phthalocyanines Spectra
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/65144 , vital:28695
- Description: This study presents the synthesis, spectroscopic, photophysical and theoretical characterisation of metal-free (H2TPrOPhOPc), cobalt (CoTPrOPhOPc) and manganese (MnTPrOPhOPc) tetra 4-(4-propargyloxy) phenoxy phthalocyanines. Thermal analysis using thermogravimetric analysis (TGA) confirmed the excellent thermal stability of synthesized tetra 4-(4- propargyloxy) phenoxy phthalocyanines. The metal complexes, CoTPrOPhOPc and MnTPrOPhOPc, exhibited better thermal stability when compared to H2TPrOPhOPc. The residual percentage weight remaining was approximately 70% for CoTPrOPhOPc and MnTPrOPhOPc and 45% for H2TPrOPhOPc after 600°C, clearly confirming the stability of the metal complexes. The MTPrOPhOPcs (where M = H2, Co and Mn) complexes exhibited excellent nonlinear optical properties with strong reverse saturable absorption (RSA), especially when 560 nm excitation laser was used. Their nonlinear optical properties followed this trend: H2TPrOPhOPc > CoTPrOPhOPc > MnTPrOPhOPc. According to the trend observed, the H2TPrOPhOPc was an excellent nonlinear optical limiter when compared to the CoTPrOPhOPc and MnTPrOPhOPc. All the investigated complexes exhibited optical limiting properties comparable to the phthalocyanine complexes reported in the literature. The MTPrOPhOPc complexes were further studied for their electrocatalytic and electroanalytical properties towards the detection of hydrogen peroxide. For the electrocatalytic studies, the synthesized complexes were immobilized onto gold electrode surfaces pre-functionalized with phenylazide (Au-PAz) monolayer. Copper (I) catalyzed alkynyl-azide cycloaddition reaction was used to covalently immobilize the MTPrOPhOPcs onto the gold electrode surfaces to form Au-PAz-MTPrOPhOPc. The MTPrOPhOPcs modified gold surfaces (Au-PAz-MTPrOPhOPc) exhibited good reproducibility and stability in various electrolyte conditions. Electrochemical and surface characterisation of the functionalised gold electrode surfaces confirmed the presence of the MTPrOPhOPcs and their electroanalysis was excellent towards electrocatalytic reduction of H2O2, with the limit of detection (LoD) and limit of quantification (LoQ) in the ^M range. The electrocatalytic reduction peaks for H2O2 were observed at -0.37 V for Au-PAz-MnTPrOPhOPc and -0.31 V for Au-PAz-CoTPrOPhOPc when Ag|AgCl pseudo-reference electrode was used. The Au-PAz-MnTPrOPhOPc and Au- PAz-CoTPrOPhOPc gold electrode surfaces showed good sensitivity and reproducibility towards the electrocatalytic reduction of hydrogen peroxide in pH 7.4 phosphate buffer solution. , Thesis (MSc) -- Faculty of Science, Chemistry, 2017
- Full Text:
- Date Issued: 2017
Factors influencing entrepreneurial capabilities of South African schools: the case of selected schools in Harry Gwala District in Kwazulu Natal
- Authors: Nkala, Siphosenkosi
- Date: 2021-12
- Subjects: Entrepreneurship -- South Africa , School improvement programs -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54255 , vital:46381
- Description: The South African public education system has for a long time been criticised for a number of things, including failing to meet international quality standards, poor resource management and failure to cope with rapid changes in the global environment. One of the most scathing of all these attacks, however, has been that it continues to churn out thousands of unemployable youth year after year. One critical area of improving this state of affairs could lie in the avenue of entrepreneurial education. There is no doubt that there is a considerable need to have an educated citizenry in South Africa. Since the dawn of democracy, government has made concerted efforts to improve the provision of education especially to the previously disadvantaged sections of the population. However, it has been proven that there is an even more dire need to produce competent and skilled school graduates who will not only be prepared for the job market, but also those who will be creators of much needed employment. In the pursuit of entrepreneurial education, entrepreneurial development capability thus becomes an important factor that needs to be understood in line with other factors that can be used to enhance it. It is hoped that understanding these factors will assist education managers to consider their implementation in their respective organisations. This study sought to establish a framework that might enable South African schools to enhance the entrepreneurial development capability of these schools. Initially, the study sought to investigate the contribution that education and training, culture of entrepreneurship, funding and finance, human capital and workforce, engaging the private sector and regulatory framework and infrastructure make in achieving the entrepreneurial development capability of schools. After conducting an exploratory factor analysis, these variables were however reduced to three independent variables (fostering entrepreneurial culture, funding and extra-curricular opportunities and external stakeholder support) and one dependent variable (entrepreneurship development capability). A mail survey was conducted in 82 schools in the Harry Gwala district of KwaZulu Natal. The purpose of the study was to investigate where the identified independent variables positively contribute to the entrepreneurship development capability of these schools. The major findings of the study reveal a low level of prevalence of the independent variables (fostering entrepreneurial culture, funding and extra-curricular opportunities and external stakeholder support) and the dependent variable (entrepreneurship development capability) in the participating schools. The empirical results also showed that all three independent variables were significantly positively related to the entrepreneurship development capability of the participating schools. These independent variables are therefore important determinants of the entrepreneurship development capability of schools. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Nkala, Siphosenkosi
- Date: 2021-12
- Subjects: Entrepreneurship -- South Africa , School improvement programs -- South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/54255 , vital:46381
- Description: The South African public education system has for a long time been criticised for a number of things, including failing to meet international quality standards, poor resource management and failure to cope with rapid changes in the global environment. One of the most scathing of all these attacks, however, has been that it continues to churn out thousands of unemployable youth year after year. One critical area of improving this state of affairs could lie in the avenue of entrepreneurial education. There is no doubt that there is a considerable need to have an educated citizenry in South Africa. Since the dawn of democracy, government has made concerted efforts to improve the provision of education especially to the previously disadvantaged sections of the population. However, it has been proven that there is an even more dire need to produce competent and skilled school graduates who will not only be prepared for the job market, but also those who will be creators of much needed employment. In the pursuit of entrepreneurial education, entrepreneurial development capability thus becomes an important factor that needs to be understood in line with other factors that can be used to enhance it. It is hoped that understanding these factors will assist education managers to consider their implementation in their respective organisations. This study sought to establish a framework that might enable South African schools to enhance the entrepreneurial development capability of these schools. Initially, the study sought to investigate the contribution that education and training, culture of entrepreneurship, funding and finance, human capital and workforce, engaging the private sector and regulatory framework and infrastructure make in achieving the entrepreneurial development capability of schools. After conducting an exploratory factor analysis, these variables were however reduced to three independent variables (fostering entrepreneurial culture, funding and extra-curricular opportunities and external stakeholder support) and one dependent variable (entrepreneurship development capability). A mail survey was conducted in 82 schools in the Harry Gwala district of KwaZulu Natal. The purpose of the study was to investigate where the identified independent variables positively contribute to the entrepreneurship development capability of these schools. The major findings of the study reveal a low level of prevalence of the independent variables (fostering entrepreneurial culture, funding and extra-curricular opportunities and external stakeholder support) and the dependent variable (entrepreneurship development capability) in the participating schools. The empirical results also showed that all three independent variables were significantly positively related to the entrepreneurship development capability of the participating schools. These independent variables are therefore important determinants of the entrepreneurship development capability of schools. , Thesis (MBA) -- Faculty of Business and Economic Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Beauty from Ashes:short term postfire regeneration of dune fynbos -thicket vegetation in the South Eastern Cape floristic region
- Authors: Gcina, Sinenjongo
- Date: 2022-12
- Subjects: Fynbos ecology – Nelson Mandela University Campus Nature Reserve , Forest fires -- Prevention and control
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59666 , vital:62319
- Description: Aim This study aims to provide an understanding and a description of the short-term postfire regeneration and ecology of the fynbos-thicket vegetation on a coastal dune system in the southeastern Cape Floristic Region. Another aim is to assess the recovery of the vegetation community by assessing the growth forms and the disturbance response across a range of species from thicket and fynbos communities and to provide a belowground bud bank classification for each of these species in the coastal dune systems. Location The study site was the Mandela University Reserve and the Noordhoek dune fields, situated in Gqeberha, Eastern Cape, which is part of the south-eastern Cape Floristic Region. The study site hosts thicket-fynbos mosaic vegetation type that occurs in a Mediterranean-Climate Ecosystem (MCE). Methods Firstly, field observations and photographs of plant species were taken weekly to assess and identify the species that were emerging and persisting in the dune system in the first 12 months postfire. Phenological events of the species that emerged (e.g., flowering, fruiting, leaf growth, leaf yellowing, and leaf abscission) were also observed and reported on. Secondly, an excavation of 21 species (e.g., Jamesbrittenia microphylla, Euclea racemosa, Olea exasperata, Searsia laevigata) was conducted to classify the species into their belowground bud bank types. Results There was a rapid emergence of resprouters (facultative resprouters and obligate resprouters) in the first 12 months postfire. This was followed by their growth; primarily occurring after the rainfall events. The dominant resprouting species (facultative resprouters and obligate resprouters) entered the system two weeks after the fire. There was a significant difference in the time to the first emergence of the different regeneration groups postfire (P < 0.001): on average, obligate sprouters (OS) appeared 1 month after fire – two months earlier than facultative sprouters (FS) and four months earlier than non-sprouters (NS). There was no statistical evidence to suggest that the FS and non-sprouters NS emerged at different times postfire; however, most NS species were observed in the system 5 months after fire. 4 Exceptions were the NS species Pelargonium grossularoides and Mesembryanthemum aitonis, both annuals that emerged 1 month after fire. A wide range of OS species that appeared earlier in the system (e.g., Euclea racemosa, Olea exasperata, Searsia laevigata, and Lauridia tetragona) exhibit underground lateral growth with belowground bud banks (BBBs) from which they recover after disturbance. In total, six BBB types were recorded in this study, namely: bud-bearing root, rhizome, rhizophore, woody rhizome, stem tuber, and corms. The bud-bearing root from woody species was the dominant BBB in this system. Main conclusion The return of species that occurs in the first year after fire occurs rapidly in the first 2 months as resprouting species (primarily OS) appear in the system. Following this, the rate of return of species decreases as reseeding species (primarily NS) gradually reestablish and occupy the gaps in the dune fynbos-thicket vegetation. This study has shown that plant species in this ecosystem are adapted to fire disturbance as their populations are able to reestablish through various regeneration strategies, including resprouting from different types of BBB. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Gcina, Sinenjongo
- Date: 2022-12
- Subjects: Fynbos ecology – Nelson Mandela University Campus Nature Reserve , Forest fires -- Prevention and control
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59666 , vital:62319
- Description: Aim This study aims to provide an understanding and a description of the short-term postfire regeneration and ecology of the fynbos-thicket vegetation on a coastal dune system in the southeastern Cape Floristic Region. Another aim is to assess the recovery of the vegetation community by assessing the growth forms and the disturbance response across a range of species from thicket and fynbos communities and to provide a belowground bud bank classification for each of these species in the coastal dune systems. Location The study site was the Mandela University Reserve and the Noordhoek dune fields, situated in Gqeberha, Eastern Cape, which is part of the south-eastern Cape Floristic Region. The study site hosts thicket-fynbos mosaic vegetation type that occurs in a Mediterranean-Climate Ecosystem (MCE). Methods Firstly, field observations and photographs of plant species were taken weekly to assess and identify the species that were emerging and persisting in the dune system in the first 12 months postfire. Phenological events of the species that emerged (e.g., flowering, fruiting, leaf growth, leaf yellowing, and leaf abscission) were also observed and reported on. Secondly, an excavation of 21 species (e.g., Jamesbrittenia microphylla, Euclea racemosa, Olea exasperata, Searsia laevigata) was conducted to classify the species into their belowground bud bank types. Results There was a rapid emergence of resprouters (facultative resprouters and obligate resprouters) in the first 12 months postfire. This was followed by their growth; primarily occurring after the rainfall events. The dominant resprouting species (facultative resprouters and obligate resprouters) entered the system two weeks after the fire. There was a significant difference in the time to the first emergence of the different regeneration groups postfire (P < 0.001): on average, obligate sprouters (OS) appeared 1 month after fire – two months earlier than facultative sprouters (FS) and four months earlier than non-sprouters (NS). There was no statistical evidence to suggest that the FS and non-sprouters NS emerged at different times postfire; however, most NS species were observed in the system 5 months after fire. 4 Exceptions were the NS species Pelargonium grossularoides and Mesembryanthemum aitonis, both annuals that emerged 1 month after fire. A wide range of OS species that appeared earlier in the system (e.g., Euclea racemosa, Olea exasperata, Searsia laevigata, and Lauridia tetragona) exhibit underground lateral growth with belowground bud banks (BBBs) from which they recover after disturbance. In total, six BBB types were recorded in this study, namely: bud-bearing root, rhizome, rhizophore, woody rhizome, stem tuber, and corms. The bud-bearing root from woody species was the dominant BBB in this system. Main conclusion The return of species that occurs in the first year after fire occurs rapidly in the first 2 months as resprouting species (primarily OS) appear in the system. Following this, the rate of return of species decreases as reseeding species (primarily NS) gradually reestablish and occupy the gaps in the dune fynbos-thicket vegetation. This study has shown that plant species in this ecosystem are adapted to fire disturbance as their populations are able to reestablish through various regeneration strategies, including resprouting from different types of BBB. , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-12