Investigation of thermal and electrical characteristics of crystalline silicon photovoltaic modules under varying operational conditions
- Authors: Vumbugwa, Monphias
- Date: 2022-12
- Subjects: Photovoltaic power generation -- South Africa , Silicon crystals -- South Africa , Solar cells
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/60014 , vital:62733
- Description: Solar energy has become an attractive and environmentally mindful method in electrical power generation as it contributes significantly to meeting the high demand for the power needed for socio and economic developments. The rise in deployment of Photovoltaic (PV) facilities with large capacity creates the need for accurate and reliable PV inspection techniques for optimum performance, the longevity of PV modules and quick return on PV investment. The performance of PV modules in the field is often monitored through several inspection methods that require a rapid throughput such as Thermal Infrared (TIR) imaging and current-voltage (I-V) measurements. Unmanned Aerial Vehicle (UAV) based TIR imaging is widely applied in large PV plants since it is cost-effective and is usually conducted in-situ while the plant is operating at irradiance levels above 600 W.m-2 . One of the outcomes of the interpretations of TIR images is an attempt to quantify the energy loss in PV plants associated with the abnormal thermal signatures identified on TIR images. No standard procedure has yet outlined the quantification of energy loss related to TIR images of underperforming modules since the interpretation of TIR images remains a challenge. PV modules operate under dynamic operating conditions which can influence the results and interpretation of thermal and electrical characterisation measurements. Dynamic operation conditions refer to any disorders in the operation of the modules and cells which cause a change in the current and voltage characteristics of the PV source. These dynamic operation conditions include; changesin load conditions, irradiance, soiling and shading levels. The tests were done under steady state conditions. Although measurements are generally done while the operating conditions are as steady as possible, some changes in conditions have a profound effect on thermal and electrical measurements. In this study, these effects and some of the changes in conditions that cause them were studied. , Thesis (PhD) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Vumbugwa, Monphias
- Date: 2022-12
- Subjects: Photovoltaic power generation -- South Africa , Silicon crystals -- South Africa , Solar cells
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/60014 , vital:62733
- Description: Solar energy has become an attractive and environmentally mindful method in electrical power generation as it contributes significantly to meeting the high demand for the power needed for socio and economic developments. The rise in deployment of Photovoltaic (PV) facilities with large capacity creates the need for accurate and reliable PV inspection techniques for optimum performance, the longevity of PV modules and quick return on PV investment. The performance of PV modules in the field is often monitored through several inspection methods that require a rapid throughput such as Thermal Infrared (TIR) imaging and current-voltage (I-V) measurements. Unmanned Aerial Vehicle (UAV) based TIR imaging is widely applied in large PV plants since it is cost-effective and is usually conducted in-situ while the plant is operating at irradiance levels above 600 W.m-2 . One of the outcomes of the interpretations of TIR images is an attempt to quantify the energy loss in PV plants associated with the abnormal thermal signatures identified on TIR images. No standard procedure has yet outlined the quantification of energy loss related to TIR images of underperforming modules since the interpretation of TIR images remains a challenge. PV modules operate under dynamic operating conditions which can influence the results and interpretation of thermal and electrical characterisation measurements. Dynamic operation conditions refer to any disorders in the operation of the modules and cells which cause a change in the current and voltage characteristics of the PV source. These dynamic operation conditions include; changesin load conditions, irradiance, soiling and shading levels. The tests were done under steady state conditions. Although measurements are generally done while the operating conditions are as steady as possible, some changes in conditions have a profound effect on thermal and electrical measurements. In this study, these effects and some of the changes in conditions that cause them were studied. , Thesis (PhD) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 2022
- Full Text:
- Date Issued: 2022-12
Knee Joint Competence Post Anterior Cruciate Ligament Reconstruction in Amateur South Western Districts Rugby Players
- Potgieter, Quinten Christiaan
- Authors: Potgieter, Quinten Christiaan
- Date: 2022-12
- Subjects: Neuromuscular depolarizing agents , Knee--Wounds and injuries -- South Western Districts , Rugby Players
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60266 , vital:64289
- Description: Background: Globally, literature has shown that rugby players struggle to return to the same level of performance post anterior cruciate ligament (ACL) reconstruction. This phenomenon is further exacerbated amongst South African Rugby players, compounded by the ranking of the national team amongst the top ten rugby teams worldwide. Paired with the psychosocial aspect of return to play, the physical and physiological competence of the knee joint is of pivotal importance. Purpose: To compare relative dynamic stability scores paired with electromyography (EMG) scores between the injured and uninjured legs, thereby enabling an explorative, descriptive report on dynamic proprioceptive abilities post ACL reconstruction (ACLR). The study findings therefore aim to inform rehabilitative practice in a rugby player who underwent ACLR. Study Design: A quantitative, explorative and descriptive design was used, with a purposive sampling strategy. Methods: Biographical and anthropometrical data was measured upon inception. Muscular activation was measured using electromyography (EMG) placements on quadriceps muscles which included the vastus medialis obliques (VMO), and vastus lateralis (VL). Dynamic proprioception was measured using the star excursion balance test (SEBT) and normalised to leg length. A neuromuscular fatigue protocol was used to measure the impact of neuromuscular fatigue on dynamic stability, and muscle activation between the injured and uninjured lower limbs. Results: A sample of 15 participants from the South Western Districts (SWD) rugby team, fitting the inclusion criteria, were included in the study. The average age was 27±2.7 years. The results indicated that fatigue did not significantly affect the SEBT scores between the injured and uninjured lower limbs. However, the VMO muscle activation showed a statistically significant difference in muscle firing in a pre-fatigue state. This difference was evident in two of the eight directions namely anteromedial direction (p = 0.041), and in the lateral direction (p = 0.047). Furthermore, these result differences were favoured in the uninjured limb. No significant differences between the injured and uninjured lower limbs were found in respect to VMO and VL muscle activation, in a fatigued state. vi Conclusion: Practically translated, the study results showed that the injured lower limb, showed no significant differences in dynamic stability during both the non-fatigued and the fatigued SEBT. Therefore, the finding of this study is a steppingstone towards informing return to play criteria for adequate dynamic knee stability and proprioception. It should be noted that further research is necessary to refine return to play criteria and thereby decrease the risk for re-injury. Keywords: anterior cruciate ligament; dynamic stability; neuro-muscular fatigue; reconstruction; re-injury; return-to-sport; rugby. , Thesis (MA) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Potgieter, Quinten Christiaan
- Date: 2022-12
- Subjects: Neuromuscular depolarizing agents , Knee--Wounds and injuries -- South Western Districts , Rugby Players
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60266 , vital:64289
- Description: Background: Globally, literature has shown that rugby players struggle to return to the same level of performance post anterior cruciate ligament (ACL) reconstruction. This phenomenon is further exacerbated amongst South African Rugby players, compounded by the ranking of the national team amongst the top ten rugby teams worldwide. Paired with the psychosocial aspect of return to play, the physical and physiological competence of the knee joint is of pivotal importance. Purpose: To compare relative dynamic stability scores paired with electromyography (EMG) scores between the injured and uninjured legs, thereby enabling an explorative, descriptive report on dynamic proprioceptive abilities post ACL reconstruction (ACLR). The study findings therefore aim to inform rehabilitative practice in a rugby player who underwent ACLR. Study Design: A quantitative, explorative and descriptive design was used, with a purposive sampling strategy. Methods: Biographical and anthropometrical data was measured upon inception. Muscular activation was measured using electromyography (EMG) placements on quadriceps muscles which included the vastus medialis obliques (VMO), and vastus lateralis (VL). Dynamic proprioception was measured using the star excursion balance test (SEBT) and normalised to leg length. A neuromuscular fatigue protocol was used to measure the impact of neuromuscular fatigue on dynamic stability, and muscle activation between the injured and uninjured lower limbs. Results: A sample of 15 participants from the South Western Districts (SWD) rugby team, fitting the inclusion criteria, were included in the study. The average age was 27±2.7 years. The results indicated that fatigue did not significantly affect the SEBT scores between the injured and uninjured lower limbs. However, the VMO muscle activation showed a statistically significant difference in muscle firing in a pre-fatigue state. This difference was evident in two of the eight directions namely anteromedial direction (p = 0.041), and in the lateral direction (p = 0.047). Furthermore, these result differences were favoured in the uninjured limb. No significant differences between the injured and uninjured lower limbs were found in respect to VMO and VL muscle activation, in a fatigued state. vi Conclusion: Practically translated, the study results showed that the injured lower limb, showed no significant differences in dynamic stability during both the non-fatigued and the fatigued SEBT. Therefore, the finding of this study is a steppingstone towards informing return to play criteria for adequate dynamic knee stability and proprioception. It should be noted that further research is necessary to refine return to play criteria and thereby decrease the risk for re-injury. Keywords: anterior cruciate ligament; dynamic stability; neuro-muscular fatigue; reconstruction; re-injury; return-to-sport; rugby. , Thesis (MA) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-12
Knowledge, attitude and perceptions of pre-hospital emergency care providers concerning pre-hospital clinical practice guidelines in the Mangaung Metropolitan area, Free State, South Africa
- Ramoshaba, Mapule Petronella
- Authors: Ramoshaba, Mapule Petronella
- Date: 2022-12
- Subjects: Emergency medical services
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27220 , vital:66471
- Description: Background and Introduction. Pre-hospital emergency care provided in a timeous and efficient manner is a pivotal component in improved patient prognosis, after a life altering situation has occurred. This management of patients is rendered prior to arrival at a medical facility. This service is provided by pre-hospital emergency care providers who apply life saving techniques and knowledge within their scopes of practice and then transporting patients to appropriate medical facilities for definitive care. Pre-hospital emergency care providers of all levels of care, namely: Basic life support, Intermediate life support and Advanced life support render emergency care services to patients with a main goal of seeing patients return back to normal life living. For this to be achieved, the providers must be empowered with the best knowledge, appropriate skills and adequate equipment at their disposal. Clinical practice guidelines are recommendations that are based on evidence in order to support beneficial clinical practices. These were introduced in the pre-hospital setting in South Africa in 2018 to review the scopes of practice of all levels of care, and make appropriate changes and additions for the betterment of the patient and the upskilling of pre-hospital emergency care providers. Since the providers are the end users of these guidelines, and are expected to apply them on patients, they are the best candidates to provide clarity on their perceptions, experiences and challenges which leads to the research questions being: What are the perceptions of the Pre-hospital Emergency Care Providers on the Pre-hospital Clinical Practice in the Guidelines? And What are the challenges experienced by the Pre-hospital Emergency Care Providers with regards to the implementation of the Pre-hospital Clinical Practice Guidelines in the application of Pre-hospital emergency medicine? The aim of the study was to explore the perceptions of the Pre-hospital Emergency Care Providers using the implemented Pre-hospital Clinical Practice Guidelines. Methods The study adopted a qualitative research approach with a purposive sampling method used to select the participants. This type of non-probability technique was suitable in the study as it is based on the researcher’s judgement of the participants being knowledgeable on the questions asked. An interview guide was utilised to collect data through semi-structured one on one interviews during which participants perceptions on the Clinical practice guidelines were shared. The data analysis process brought forth themes and sub themes that were aligned to the research findings which yielded the results. Results/findings The results encompassed the participants’ perceptions about pre-hospital clinical Practice Guidelines, as well as their knowledge, attitude, challenges, suggestions and recommendations. These results unearthed some of the reasons for the pre-hospital emergency care providers perceptions towards the guidelines. The majority of PECPS have a positive attitude towards the pre-hospital clinical practice guidelines, but have challenges with the availability of equipment and drugs which is caused by the lack of due diligence in complying with the implementation of the guidelines. Conclusion The recommendations and suggestions from the participants and researcher come with divisive strategies to the implementation of the guidelines and activities to be applied for the smooth implementation of the pre-hospital clinical practice guidelines. The basis for these recommendations and suggestions were the results as per the research findings. , Thesis (MPH) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Ramoshaba, Mapule Petronella
- Date: 2022-12
- Subjects: Emergency medical services
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27220 , vital:66471
- Description: Background and Introduction. Pre-hospital emergency care provided in a timeous and efficient manner is a pivotal component in improved patient prognosis, after a life altering situation has occurred. This management of patients is rendered prior to arrival at a medical facility. This service is provided by pre-hospital emergency care providers who apply life saving techniques and knowledge within their scopes of practice and then transporting patients to appropriate medical facilities for definitive care. Pre-hospital emergency care providers of all levels of care, namely: Basic life support, Intermediate life support and Advanced life support render emergency care services to patients with a main goal of seeing patients return back to normal life living. For this to be achieved, the providers must be empowered with the best knowledge, appropriate skills and adequate equipment at their disposal. Clinical practice guidelines are recommendations that are based on evidence in order to support beneficial clinical practices. These were introduced in the pre-hospital setting in South Africa in 2018 to review the scopes of practice of all levels of care, and make appropriate changes and additions for the betterment of the patient and the upskilling of pre-hospital emergency care providers. Since the providers are the end users of these guidelines, and are expected to apply them on patients, they are the best candidates to provide clarity on their perceptions, experiences and challenges which leads to the research questions being: What are the perceptions of the Pre-hospital Emergency Care Providers on the Pre-hospital Clinical Practice in the Guidelines? And What are the challenges experienced by the Pre-hospital Emergency Care Providers with regards to the implementation of the Pre-hospital Clinical Practice Guidelines in the application of Pre-hospital emergency medicine? The aim of the study was to explore the perceptions of the Pre-hospital Emergency Care Providers using the implemented Pre-hospital Clinical Practice Guidelines. Methods The study adopted a qualitative research approach with a purposive sampling method used to select the participants. This type of non-probability technique was suitable in the study as it is based on the researcher’s judgement of the participants being knowledgeable on the questions asked. An interview guide was utilised to collect data through semi-structured one on one interviews during which participants perceptions on the Clinical practice guidelines were shared. The data analysis process brought forth themes and sub themes that were aligned to the research findings which yielded the results. Results/findings The results encompassed the participants’ perceptions about pre-hospital clinical Practice Guidelines, as well as their knowledge, attitude, challenges, suggestions and recommendations. These results unearthed some of the reasons for the pre-hospital emergency care providers perceptions towards the guidelines. The majority of PECPS have a positive attitude towards the pre-hospital clinical practice guidelines, but have challenges with the availability of equipment and drugs which is caused by the lack of due diligence in complying with the implementation of the guidelines. Conclusion The recommendations and suggestions from the participants and researcher come with divisive strategies to the implementation of the guidelines and activities to be applied for the smooth implementation of the pre-hospital clinical practice guidelines. The basis for these recommendations and suggestions were the results as per the research findings. , Thesis (MPH) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-12
Low energy storage off-grid photovoltaic systems
- Authors: Ribisi, Edwin Tebogo
- Date: 2022-12
- Subjects: Solar panels , Photovoltaic power systems
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60489 , vital:65634
- Description: Electricity is one of humanity's most important resources for enhancing the quality of life. With over 770 million people worldwide still without access to electricity, this is a big global challenge that requires a variety of solutions if we humans are to achieve the 2030 sustainable development objectives, such as zero poverty and universal access to electricity. A major number of the 770 million people who lack access to electricity reside in regions with abundant sun irradiation. Electrification is a practical key to unlocking socio-economic development in impoverished regions. PV systems with batteries have a disadvantage of requiring high capital costs, with batteries being the most expensive component in such a system. Accumulation of maintenance and replacement costs of batteries are high throughout the lifespan of a PV system with batteries due to limited lifespan of batteries, typical 1-3 years. A batteryless PV system for daytime commercial purposes is proposed in the dissertation. An experimental set up of the proposed batteryless PV system was constructed and tested in a laboratory. A load controller for the batteryless PV system was implemented, loads were given priority levels and schedule times to be operated during the day. A DC dump load regulates DC bus voltage and also acts as a water heater. Furthermore, a simulation model was developed on MATLAB Simulink. The simulation model consisted of two case study scenarios, 3 solar panel system and 7 solar panel system of an internet café business. Better system performance was noticed when loads were given priority levels with no schedule times. This dissertation establishes the foundation for a completely batteryless solar system designed to cultivate daytime economic activities in impoverished communities to increase revenue opportunities. , Thesis (MA) -- Faculty of Engineering, the Built Environment and Technology, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Ribisi, Edwin Tebogo
- Date: 2022-12
- Subjects: Solar panels , Photovoltaic power systems
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60489 , vital:65634
- Description: Electricity is one of humanity's most important resources for enhancing the quality of life. With over 770 million people worldwide still without access to electricity, this is a big global challenge that requires a variety of solutions if we humans are to achieve the 2030 sustainable development objectives, such as zero poverty and universal access to electricity. A major number of the 770 million people who lack access to electricity reside in regions with abundant sun irradiation. Electrification is a practical key to unlocking socio-economic development in impoverished regions. PV systems with batteries have a disadvantage of requiring high capital costs, with batteries being the most expensive component in such a system. Accumulation of maintenance and replacement costs of batteries are high throughout the lifespan of a PV system with batteries due to limited lifespan of batteries, typical 1-3 years. A batteryless PV system for daytime commercial purposes is proposed in the dissertation. An experimental set up of the proposed batteryless PV system was constructed and tested in a laboratory. A load controller for the batteryless PV system was implemented, loads were given priority levels and schedule times to be operated during the day. A DC dump load regulates DC bus voltage and also acts as a water heater. Furthermore, a simulation model was developed on MATLAB Simulink. The simulation model consisted of two case study scenarios, 3 solar panel system and 7 solar panel system of an internet café business. Better system performance was noticed when loads were given priority levels with no schedule times. This dissertation establishes the foundation for a completely batteryless solar system designed to cultivate daytime economic activities in impoverished communities to increase revenue opportunities. , Thesis (MA) -- Faculty of Engineering, the Built Environment and Technology, 2022
- Full Text:
- Date Issued: 2022-12
Main thesis title
- Authors: Tsamago, Hodi, Elias
- Date: 2022-12
- Subjects: Technology integration , SOLEs pedagogy , Metacognitive
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/60549 , vital:65833
- Description: The study was carried out to investigate the effect of the use of technology in self-organised learning environments (SOLEs) (in Physical Sciences classrooms) on learners’ metacognitive skills. The study contributes by identifying a technology-enhanced pedagogy that can effectively equip learners with metacognitive skills, which many studies have reported as having an effect on Physical Sciences learners’ conceptual understanding. The study followed an experimental (control group quasi-experimental) methods design, in which both qualitative and quantitative data were collected and analysed. A multistep stratified sampling method (which caters for both quantitative and qualitative facets) was employed to choose four schools (two rural and two urban) to participate in the study. These schools were randomly chosen from the population of all schools offering Physical Sciences in Grade 11 in the Capricorn District of Limpopo Province, South Africa were assigned to urban experimental group and rural experimental group (UEG and REG) and urban control group and rural control group (UCG and RCG) using geographical demographics. The participants were selected using both simple random sampling (for quantitative methods) and purposive sampling (for qualitative methods). The experimental groups were taught by the researcher using self-organised learning environments (SOLEs) pedagogy, while control groups were taught (also by the researcher of the study) using a traditional chalk-and-talk approach. A Physical Sciences concepts pre-/post-test and the Metacognitive Self-Assessment Scale (MSAS) questionnaire were used to glean the quantitative data, while focus group interviews (FGIs) were used to obtain the qualitative data. The analysis of the quantitative data employed both descriptive (mean, standard deviation and graphs) and inferential (both parametric t-test and non-parametric Kruskal-Wallis and Wilcoxon signed-rank tests) statistics computed using the SPSS package version 22, while qualitative data were analysed thematically using coding techniques (applied on a sentence-by-sentence basis) after the transcription of the recorded FGIs. The study found that SOLEs pedagogy improves learners’ metacognitive skills, leading to better Physical Sciences conceptual understanding. In addition, the results indicate that all v aspects of metacognitive skills improved in experimental groups; however, certain aspects exhibited outstanding improvement such as “Respect shown to myself”; “Respect shown to others”; “Respect shown for empathy towards others” and “Respect shown towards problem solving”. Furthermore, the results of the FGIs revealed that a plausible explanation for the ability of SOLEs pedagogy to enhance metacognitive skills lies in its effortlessness to enable learners to link their classroom experiences to real-life experiences; simulate practical work; adapt to collaborative learning; use multiple channels for receiving information; and reducing learners’ reliance on the teacher. Hence, this study recommends the implementation of SOLEs pedagogy in the Physical Sciences classroom to improve learners’ metacognitive skills and conceptual understanding. However, the study had limitations, some of which included the sample size (which has an effect on the degree of generalisability of the research findings) and the period during which SOLEs pedagogy was implemented which might not have been long enough to exhaust its effect on metacognitive skills. Accordingly, further studies employing a longitudinal study design with a sample size bigger than 350 participants would be useful in understanding the effects of SOLEs pedagogy on metacognitive skills and improving the generalisability of research findings , Thesis (PhD) -- Faculty of education, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Tsamago, Hodi, Elias
- Date: 2022-12
- Subjects: Technology integration , SOLEs pedagogy , Metacognitive
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/60549 , vital:65833
- Description: The study was carried out to investigate the effect of the use of technology in self-organised learning environments (SOLEs) (in Physical Sciences classrooms) on learners’ metacognitive skills. The study contributes by identifying a technology-enhanced pedagogy that can effectively equip learners with metacognitive skills, which many studies have reported as having an effect on Physical Sciences learners’ conceptual understanding. The study followed an experimental (control group quasi-experimental) methods design, in which both qualitative and quantitative data were collected and analysed. A multistep stratified sampling method (which caters for both quantitative and qualitative facets) was employed to choose four schools (two rural and two urban) to participate in the study. These schools were randomly chosen from the population of all schools offering Physical Sciences in Grade 11 in the Capricorn District of Limpopo Province, South Africa were assigned to urban experimental group and rural experimental group (UEG and REG) and urban control group and rural control group (UCG and RCG) using geographical demographics. The participants were selected using both simple random sampling (for quantitative methods) and purposive sampling (for qualitative methods). The experimental groups were taught by the researcher using self-organised learning environments (SOLEs) pedagogy, while control groups were taught (also by the researcher of the study) using a traditional chalk-and-talk approach. A Physical Sciences concepts pre-/post-test and the Metacognitive Self-Assessment Scale (MSAS) questionnaire were used to glean the quantitative data, while focus group interviews (FGIs) were used to obtain the qualitative data. The analysis of the quantitative data employed both descriptive (mean, standard deviation and graphs) and inferential (both parametric t-test and non-parametric Kruskal-Wallis and Wilcoxon signed-rank tests) statistics computed using the SPSS package version 22, while qualitative data were analysed thematically using coding techniques (applied on a sentence-by-sentence basis) after the transcription of the recorded FGIs. The study found that SOLEs pedagogy improves learners’ metacognitive skills, leading to better Physical Sciences conceptual understanding. In addition, the results indicate that all v aspects of metacognitive skills improved in experimental groups; however, certain aspects exhibited outstanding improvement such as “Respect shown to myself”; “Respect shown to others”; “Respect shown for empathy towards others” and “Respect shown towards problem solving”. Furthermore, the results of the FGIs revealed that a plausible explanation for the ability of SOLEs pedagogy to enhance metacognitive skills lies in its effortlessness to enable learners to link their classroom experiences to real-life experiences; simulate practical work; adapt to collaborative learning; use multiple channels for receiving information; and reducing learners’ reliance on the teacher. Hence, this study recommends the implementation of SOLEs pedagogy in the Physical Sciences classroom to improve learners’ metacognitive skills and conceptual understanding. However, the study had limitations, some of which included the sample size (which has an effect on the degree of generalisability of the research findings) and the period during which SOLEs pedagogy was implemented which might not have been long enough to exhaust its effect on metacognitive skills. Accordingly, further studies employing a longitudinal study design with a sample size bigger than 350 participants would be useful in understanding the effects of SOLEs pedagogy on metacognitive skills and improving the generalisability of research findings , Thesis (PhD) -- Faculty of education, 2022
- Full Text:
- Date Issued: 2022-12
Mesozooplankton and particle dynamics in Algoa Bay, South Africa
- Engelbrecht, Melindi Frances
- Authors: Engelbrecht, Melindi Frances
- Date: 2022-12
- Subjects: Marine zooplankton – Algoa bay -- South Africa , Estuarine ecology , Zooplankton –Ecology --South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59544 , vital:62157
- Description: Coastal ecosystems provide society with important ecosystem services: climate regulation, biogeochemical nutrient and waste cycling, food security, shoreline protection, tourism, and recreational support. Increased anthropogenic pressure on coastal ecosystems and changing environmental variables ultimately affect the provision of ecosystem services. Mesozooplankton are key trophic species and biological indicators of change within the marine environment and provide sound predictions of ecosystem responses to a changing climate due to their short life cycles and physiology linked to temperature. Algoa Bay has been the subject of extensive research and monitoring and encompasses a marine protected area (Addo Elephant National Park MPA). The Underwater Vision Profiler 5 (UVP5) was utilised with conventional sampling techniques of the PELTER monitoring program (i.e., Bongo nets) to investigate mesozooplankton (200 – 2000 µm) and particle (> 100 µm) dynamics within the dynamic coastal ecosystem of Algoa Bay, located within warmtemperate South Africa, in spring 2020 and summer 2021. This study revealed seasonal shifts in mesozooplankton taxa succession from spring herbivorous/omnivorous, dominated by copepods, to summer omnivorous/carnivorous mesozooplankton, dominated by copepods, Noctiluca sp., Cladocera, doliolids, salps and siphonophores. The mesozooplankton integrated abundance (mean ± standard error) increased from spring to summer, with 101 ± 26 (min. – max.: 18 – 200) x 103 ind m¯ 2 and 422 ± 80 (min. – max.: 37 – 1056) x 103 ind m¯ 2 , respectively. In summer, mesozooplankton composition was affected by the passage of a Natal Pulse, identified from satellite-derived sea level anomaly data. This study also provided the first vertical profiles of copepod distributions and suspended particles in Algoa Bay, with a peak of small particle (< 1 mm ESD) biomass close to the bottom and often, but not systematically, higher copepod abundances above the thermocline. The results presented herein are expected to contribute to the understanding of the coastal pelagic ecosystem in Algoa Bay in response to environmental perturbations , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Engelbrecht, Melindi Frances
- Date: 2022-12
- Subjects: Marine zooplankton – Algoa bay -- South Africa , Estuarine ecology , Zooplankton –Ecology --South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59544 , vital:62157
- Description: Coastal ecosystems provide society with important ecosystem services: climate regulation, biogeochemical nutrient and waste cycling, food security, shoreline protection, tourism, and recreational support. Increased anthropogenic pressure on coastal ecosystems and changing environmental variables ultimately affect the provision of ecosystem services. Mesozooplankton are key trophic species and biological indicators of change within the marine environment and provide sound predictions of ecosystem responses to a changing climate due to their short life cycles and physiology linked to temperature. Algoa Bay has been the subject of extensive research and monitoring and encompasses a marine protected area (Addo Elephant National Park MPA). The Underwater Vision Profiler 5 (UVP5) was utilised with conventional sampling techniques of the PELTER monitoring program (i.e., Bongo nets) to investigate mesozooplankton (200 – 2000 µm) and particle (> 100 µm) dynamics within the dynamic coastal ecosystem of Algoa Bay, located within warmtemperate South Africa, in spring 2020 and summer 2021. This study revealed seasonal shifts in mesozooplankton taxa succession from spring herbivorous/omnivorous, dominated by copepods, to summer omnivorous/carnivorous mesozooplankton, dominated by copepods, Noctiluca sp., Cladocera, doliolids, salps and siphonophores. The mesozooplankton integrated abundance (mean ± standard error) increased from spring to summer, with 101 ± 26 (min. – max.: 18 – 200) x 103 ind m¯ 2 and 422 ± 80 (min. – max.: 37 – 1056) x 103 ind m¯ 2 , respectively. In summer, mesozooplankton composition was affected by the passage of a Natal Pulse, identified from satellite-derived sea level anomaly data. This study also provided the first vertical profiles of copepod distributions and suspended particles in Algoa Bay, with a peak of small particle (< 1 mm ESD) biomass close to the bottom and often, but not systematically, higher copepod abundances above the thermocline. The results presented herein are expected to contribute to the understanding of the coastal pelagic ecosystem in Algoa Bay in response to environmental perturbations , Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-12
Modular Omni-directional AGV Developmental Platform with Integrated Suspension, Power-plant and Control Systems
- Authors: Macfarlane, Alexander B. S
- Date: 2022-12
- Subjects: Automated guided vehicle systems , Electric automobiles--Batteries--Design and construction
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59500 , vital:62123
- Description: The thesis focuses on the development of an industrial automatic guided vehicle (AGV) with omni-directional capabilities. The omni-directional strategy used was the "swerve drive" system, a system whereby a wheel can be rotated about both its y axis (rolling axis) and z axis (vertical axis). Unlike most commonly used swerve drive systems that have swerve capabilities on each wheel attached to the body of the vehicle, this research seeks to reduce cost by only having swerve capabilities on two diagonal wheels. The remaining two wheels will act as castor units. AC drives are used on the system in place of more traditional DC drives, due to their cost vs capability advantage over DC and their prevalence in the industrial environment. Since an AGV is a mobile platform any power source found on it is usually derived from batteries, a DC source. Usage of DC introduces several limitations including difficulty transforming voltage levels for different systems, inability to run AC drives directly from the power source and comparably larger conduction wires. These limitations were overcome by adding a stand-alone power-plant on the AGV in the form of an inverter. The inverter transformed the DC power supplied by a battery bank from 48 volts DC to 230 volts AC. Thus, the primary focus of this research is on the development and validation of a novel two wheel omni-directional drive system that makes use of inexpensive and readily available components that have already been proven to work in industry. , Thesis (PhD) -- Faculty of Engineering, the Built Environment, and Technology, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Macfarlane, Alexander B. S
- Date: 2022-12
- Subjects: Automated guided vehicle systems , Electric automobiles--Batteries--Design and construction
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59500 , vital:62123
- Description: The thesis focuses on the development of an industrial automatic guided vehicle (AGV) with omni-directional capabilities. The omni-directional strategy used was the "swerve drive" system, a system whereby a wheel can be rotated about both its y axis (rolling axis) and z axis (vertical axis). Unlike most commonly used swerve drive systems that have swerve capabilities on each wheel attached to the body of the vehicle, this research seeks to reduce cost by only having swerve capabilities on two diagonal wheels. The remaining two wheels will act as castor units. AC drives are used on the system in place of more traditional DC drives, due to their cost vs capability advantage over DC and their prevalence in the industrial environment. Since an AGV is a mobile platform any power source found on it is usually derived from batteries, a DC source. Usage of DC introduces several limitations including difficulty transforming voltage levels for different systems, inability to run AC drives directly from the power source and comparably larger conduction wires. These limitations were overcome by adding a stand-alone power-plant on the AGV in the form of an inverter. The inverter transformed the DC power supplied by a battery bank from 48 volts DC to 230 volts AC. Thus, the primary focus of this research is on the development and validation of a novel two wheel omni-directional drive system that makes use of inexpensive and readily available components that have already been proven to work in industry. , Thesis (PhD) -- Faculty of Engineering, the Built Environment, and Technology, 2022
- Full Text:
- Date Issued: 2022-12
Moult and energetics in three species from the Euplectes genus representing a gradient of elaborate plumage ornamentation
- Authors: Webb, Stacey Leigh
- Date: 2022-12
- Subjects: Sexual selection in animals – South Africa , Bird watching -- Africa, Southern , Plumage
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/60026 , vital:62734
- Description: Elaborate plumage ornamentation in birds has fascinated scientists since the 1800s. The evolution and persistence of elaborate and costly ornamentation seemed to be in opposition to the theory of natural selection. However, over the years research has revealed the role and functional significance of elaborate plumage ornamentation in sexual selection. Recent studies have shown that the energetic costs associated with moulting into new plumages are higher than maintenance costs, but these costs have not been quantified for species that exhibit elaborate breeding plumage ornamentation for sexual selection. In addition, for these sexually selected ornamental traits (signals) to have evolved and be maintained, there must be some aspect of individual quality that they convey to the receiver. Despite a large body of literature on sexual selection, honest signalling and ornamental plumage in birds, the physiological correlates of honest signalling during sexual selection and the messages these signals convey to the receivers are poorly understood. In this study, I investigated four aspects related to the honesty of the sexual selection signal. These were (i) seasonal variation in standardised resting metabolic rates of breeding and non-breeding birds, (ii) moult phenology, (iii) physiological parameters linked to honest signalling, and (iv) the energetic costs of production and maintenance of elaborate plumage ornamentation using three species from the Euplectes genus as model species. The three species selected, the red-collared widowbird (Euplectes ardens), fan-tailed widowbird (Euplectes axillaris) and the southern red bishop (Euplectes orix) represent a gradient of plumage elaboration and although the receivers of the sexual selection signals are known for these three species, the energetic cost of the signals and the underlying message the signals convey remain unknown. I measured seasonal variation in resting metabolic rate (RMR), body mass (Mb), thermoneutral zone (TNZ) and body temperature (Tb) over the course of two years in the three selected Euplectes species (E. ardens, E. axillaris and E. orix; chapter 2). My results showed no significant effect of season on RMR (except in E. orix females) suggesting that in these species the metabolic costs in summer (associated with breeding season) are comparable to the metabolic costs associated with thermoregulation during winter. Contrary to my prediction that metabolic costs would increase along a gradient of increasing tail length (due to the energetic costs Webb V associated with elaborate plumage ornamentation), I found no significant effect of species. The lack of a significant result indicates that once the initial investment in plumage is complete, other predictor variables play a role (in this case body mass). , Thesis (PhD) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Webb, Stacey Leigh
- Date: 2022-12
- Subjects: Sexual selection in animals – South Africa , Bird watching -- Africa, Southern , Plumage
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/60026 , vital:62734
- Description: Elaborate plumage ornamentation in birds has fascinated scientists since the 1800s. The evolution and persistence of elaborate and costly ornamentation seemed to be in opposition to the theory of natural selection. However, over the years research has revealed the role and functional significance of elaborate plumage ornamentation in sexual selection. Recent studies have shown that the energetic costs associated with moulting into new plumages are higher than maintenance costs, but these costs have not been quantified for species that exhibit elaborate breeding plumage ornamentation for sexual selection. In addition, for these sexually selected ornamental traits (signals) to have evolved and be maintained, there must be some aspect of individual quality that they convey to the receiver. Despite a large body of literature on sexual selection, honest signalling and ornamental plumage in birds, the physiological correlates of honest signalling during sexual selection and the messages these signals convey to the receivers are poorly understood. In this study, I investigated four aspects related to the honesty of the sexual selection signal. These were (i) seasonal variation in standardised resting metabolic rates of breeding and non-breeding birds, (ii) moult phenology, (iii) physiological parameters linked to honest signalling, and (iv) the energetic costs of production and maintenance of elaborate plumage ornamentation using three species from the Euplectes genus as model species. The three species selected, the red-collared widowbird (Euplectes ardens), fan-tailed widowbird (Euplectes axillaris) and the southern red bishop (Euplectes orix) represent a gradient of plumage elaboration and although the receivers of the sexual selection signals are known for these three species, the energetic cost of the signals and the underlying message the signals convey remain unknown. I measured seasonal variation in resting metabolic rate (RMR), body mass (Mb), thermoneutral zone (TNZ) and body temperature (Tb) over the course of two years in the three selected Euplectes species (E. ardens, E. axillaris and E. orix; chapter 2). My results showed no significant effect of season on RMR (except in E. orix females) suggesting that in these species the metabolic costs in summer (associated with breeding season) are comparable to the metabolic costs associated with thermoregulation during winter. Contrary to my prediction that metabolic costs would increase along a gradient of increasing tail length (due to the energetic costs Webb V associated with elaborate plumage ornamentation), I found no significant effect of species. The lack of a significant result indicates that once the initial investment in plumage is complete, other predictor variables play a role (in this case body mass). , Thesis (PhD) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-12
Participatory communications as a tool for women’s empowerment: A study of five community radio stations in Northern Ghana
- Authors: Asuman, Kofi Antwi Manfred
- Date: 2022-12
- Subjects: Women in agriculture -- Africa -- Ghana , Agricultural development , Community radios – Ghana
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/59293 , vital:62026
- Description: In the process of achieving social equity and local development in Ghana, the empowerment and improvement of the lives of women remain critical factors, because of the existing role women and girls assume in the household and larger communal setting. In Northern Ghana culture and religion have historically side-lined, and in some cases, completely excluded women from participating in the dialogues, economic and political processes that lead to, or facilitate the transformation and development of their households and communities. Even though the media has largely contributed to the discrimination and stereotype of women through how women are represented in mainstream media, the Ghanaian media, in its assumed role as the “fourth estate of the realm” has the power to explicitly advocate and implicitly frame messages which can accelerate the processes of social change, women’s empowerment and social inclusion through the community radio broadcast system (Diedong, 2017: pp. 59, 64). After 30 years of the liberalization of the Ghanaian media and 25 years after the opening of the first community radio station, there have been few studies of how community radio influences women’s empowerment, how it gives opportunity for women to participate in political processes and whether, and how, it strengthens the livelihood capabilities of women. This research was motivated by the empowerment theory and the theory of participatory development communications. The researcher also makes references to feminist media theory in his arguments about the need for women to have access to radio in order to make their own content and also listen to content produced by other women. This study adopted a mixed methods research approach and collected data through programme analysis of the sampled radio stations, focus group discussions and semi-structured interviews. After field data was collected, they were analysed in themes that focus on the objectives of this study, data is presented through thematic discourse methods in order to help the researcher draw conclusions and propose a framework to guide practitioners in the implementation of communication for development projects which use mass media in targeting women for development objectives. My analyses are broadly presented in three chapters with each chapter focusing on one research objective. Based on the data, the researcher discovered that, community radio improves the livelihoods of women in Northern Ghana by providing them with agricultural programming which teaches women new farming techniques and how to practice sustainable agriculture while improving the yield of their crops. The study also found out that community radio provides. opportunities for women to monitor how public funds meant for community development projects are allocated, disbursed, and used for their intended purposes, by creating an avenue of two-way communication and dialogue between women, their district officers, and their elected leaders. Based on the findings of the study, the researcher concludes that, it is important for development practitioners who use mass media to implement women-focused projects to conduct a contextual analysis of the communities, the women, and the identified stakeholders of the intended project because every community is unique. Whereas all women in rural areas are vulnerable and underprivileged. To some extent, their needs and preferences are different because of their different levels of education and income status. , Thesis (PhD) -- Faculty of Humanities, School of Language and Communications, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Asuman, Kofi Antwi Manfred
- Date: 2022-12
- Subjects: Women in agriculture -- Africa -- Ghana , Agricultural development , Community radios – Ghana
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/59293 , vital:62026
- Description: In the process of achieving social equity and local development in Ghana, the empowerment and improvement of the lives of women remain critical factors, because of the existing role women and girls assume in the household and larger communal setting. In Northern Ghana culture and religion have historically side-lined, and in some cases, completely excluded women from participating in the dialogues, economic and political processes that lead to, or facilitate the transformation and development of their households and communities. Even though the media has largely contributed to the discrimination and stereotype of women through how women are represented in mainstream media, the Ghanaian media, in its assumed role as the “fourth estate of the realm” has the power to explicitly advocate and implicitly frame messages which can accelerate the processes of social change, women’s empowerment and social inclusion through the community radio broadcast system (Diedong, 2017: pp. 59, 64). After 30 years of the liberalization of the Ghanaian media and 25 years after the opening of the first community radio station, there have been few studies of how community radio influences women’s empowerment, how it gives opportunity for women to participate in political processes and whether, and how, it strengthens the livelihood capabilities of women. This research was motivated by the empowerment theory and the theory of participatory development communications. The researcher also makes references to feminist media theory in his arguments about the need for women to have access to radio in order to make their own content and also listen to content produced by other women. This study adopted a mixed methods research approach and collected data through programme analysis of the sampled radio stations, focus group discussions and semi-structured interviews. After field data was collected, they were analysed in themes that focus on the objectives of this study, data is presented through thematic discourse methods in order to help the researcher draw conclusions and propose a framework to guide practitioners in the implementation of communication for development projects which use mass media in targeting women for development objectives. My analyses are broadly presented in three chapters with each chapter focusing on one research objective. Based on the data, the researcher discovered that, community radio improves the livelihoods of women in Northern Ghana by providing them with agricultural programming which teaches women new farming techniques and how to practice sustainable agriculture while improving the yield of their crops. The study also found out that community radio provides. opportunities for women to monitor how public funds meant for community development projects are allocated, disbursed, and used for their intended purposes, by creating an avenue of two-way communication and dialogue between women, their district officers, and their elected leaders. Based on the findings of the study, the researcher concludes that, it is important for development practitioners who use mass media to implement women-focused projects to conduct a contextual analysis of the communities, the women, and the identified stakeholders of the intended project because every community is unique. Whereas all women in rural areas are vulnerable and underprivileged. To some extent, their needs and preferences are different because of their different levels of education and income status. , Thesis (PhD) -- Faculty of Humanities, School of Language and Communications, 2022
- Full Text:
- Date Issued: 2022-12
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
Post Pandemic Professional Practice: Dynamics and How Spatial Design, Functionality and Perceptions are Adapting
- Authors: King, Kirsty
- Date: 2022-12
- Subjects: Built Environment -- South Africa , Pattern perception
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59476 , vital:62121
- Description: On 23 March 2020, the onset of the Covid 19 Pandemic in South Africa brought with it anxiety, uncertainty and volatility. Change was forced upon everyday life in an unprecedented way. The aim of this study was to determine how professional practices in the built environment are adapting to the forced changes from the perspective of spatial design, functionality and perception. By means of literature reviews and survey responses, insight can be obtained as to the effect of the forced changes on professional practices in South Africa. The effect of the changes and how they are being adapted to, and implemented within the built environment, becomes important, in order to fully understand such changes, from the point-of-view of quality-control mechanisms, skills and knowledge transfer and communication. A mixed-use research approach was used to gather the data; and the outcome of the study aims to identify how the forced change fully affected work-place practices and the people in them. An initial pilot questionnaire was circulated to a small group of professionals in the built environment. Following this, a web-based survey was distributed via the professional-practice governing bodies to Architects, Engineers and Quantity Surveyors within South Africa. Both professionally registered and candidate professionals were invited to participate in the survey. A low response rate of 31% was received. The data from the 47 respondents were captured on the data base. The data were then analysed by the researcher; and by a semantic approach, themes and trends were identified and assumptions were made, based on the results. The respondents identified with the forced changes; and it has emerged that the forced changes are only implemented when necessary or legislated. It was also evident that the remote working environment is not conducive to productive work flow, skills development and quality control in the built-environment sector. The study further makes recommendations, based on the objectives identified. , Thesis (MA) -- Faculty of Engineering, the Built Environment, and Technology, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: King, Kirsty
- Date: 2022-12
- Subjects: Built Environment -- South Africa , Pattern perception
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59476 , vital:62121
- Description: On 23 March 2020, the onset of the Covid 19 Pandemic in South Africa brought with it anxiety, uncertainty and volatility. Change was forced upon everyday life in an unprecedented way. The aim of this study was to determine how professional practices in the built environment are adapting to the forced changes from the perspective of spatial design, functionality and perception. By means of literature reviews and survey responses, insight can be obtained as to the effect of the forced changes on professional practices in South Africa. The effect of the changes and how they are being adapted to, and implemented within the built environment, becomes important, in order to fully understand such changes, from the point-of-view of quality-control mechanisms, skills and knowledge transfer and communication. A mixed-use research approach was used to gather the data; and the outcome of the study aims to identify how the forced change fully affected work-place practices and the people in them. An initial pilot questionnaire was circulated to a small group of professionals in the built environment. Following this, a web-based survey was distributed via the professional-practice governing bodies to Architects, Engineers and Quantity Surveyors within South Africa. Both professionally registered and candidate professionals were invited to participate in the survey. A low response rate of 31% was received. The data from the 47 respondents were captured on the data base. The data were then analysed by the researcher; and by a semantic approach, themes and trends were identified and assumptions were made, based on the results. The respondents identified with the forced changes; and it has emerged that the forced changes are only implemented when necessary or legislated. It was also evident that the remote working environment is not conducive to productive work flow, skills development and quality control in the built-environment sector. The study further makes recommendations, based on the objectives identified. , Thesis (MA) -- Faculty of Engineering, the Built Environment, and Technology, 2022
- Full Text:
- Date Issued: 2022-12
Protection of the environment from pollution emanating from offshore oil installations
- Authors: Kuture, Dudzai Chandisaita
- Date: 2022-12
- Subjects: Marine pollution -- South Africa , Marine Law – South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59710 , vital:62383
- Description: The desperate need for South Africa to develop its oil industry is driven by the goal of improving the social and economic situation in the State. This goal has sparked an interest in expanding the exploration and exploitation of oil within the marine environment to the extent of venturing into uncharted deeper waters.1 This interest has been met with a constant reminder of the Deepwater Horizon explosion as one of the many events that stirred up concerns within the global community on the possibility of an oil spill causing pollution within the marine environment. Also, that explosion and its effects have demonstrated the need for the global community to closely monitor and effectively regulate environmental matters, including the exploration and exploitation of oil and the prevention of oil pollution.2 Therefore, the recent discovery of additional oil deposits in South Africa has confirmed the need to revisit the current legal system regulating the impact on the marine environment including the exploration and exploitation of oil.3 An oil spill causing pollution amongst other pollutants is a significant contributor to loss and damage to the marine environment and its habitat. In developing States like South Africa, an oil spill causing pollution can present challenges due to the scarcity of resources, technology, and knowledge to prepare, prevent and combat the spreading of the pollutant. As it stands, in the event of an oil spill, States must rely on international cooperation and expertise to ensure that the impact does not cause irreversible harm and degradation to the marine environment. South Africa within the global community gives effect to international law by adopting domestic laws that regulate the exploration and exploitation of oil to protect the environment from oil spills causing oil pollution within the marine environment. In addition, the liability caused by oil spills plays a vital role in the need to rehabilitate the marine environment and compensate the aggrieved parties. , Thesis (LLM) -- Faculty of Law, Department of Public law , 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Kuture, Dudzai Chandisaita
- Date: 2022-12
- Subjects: Marine pollution -- South Africa , Marine Law – South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59710 , vital:62383
- Description: The desperate need for South Africa to develop its oil industry is driven by the goal of improving the social and economic situation in the State. This goal has sparked an interest in expanding the exploration and exploitation of oil within the marine environment to the extent of venturing into uncharted deeper waters.1 This interest has been met with a constant reminder of the Deepwater Horizon explosion as one of the many events that stirred up concerns within the global community on the possibility of an oil spill causing pollution within the marine environment. Also, that explosion and its effects have demonstrated the need for the global community to closely monitor and effectively regulate environmental matters, including the exploration and exploitation of oil and the prevention of oil pollution.2 Therefore, the recent discovery of additional oil deposits in South Africa has confirmed the need to revisit the current legal system regulating the impact on the marine environment including the exploration and exploitation of oil.3 An oil spill causing pollution amongst other pollutants is a significant contributor to loss and damage to the marine environment and its habitat. In developing States like South Africa, an oil spill causing pollution can present challenges due to the scarcity of resources, technology, and knowledge to prepare, prevent and combat the spreading of the pollutant. As it stands, in the event of an oil spill, States must rely on international cooperation and expertise to ensure that the impact does not cause irreversible harm and degradation to the marine environment. South Africa within the global community gives effect to international law by adopting domestic laws that regulate the exploration and exploitation of oil to protect the environment from oil spills causing oil pollution within the marine environment. In addition, the liability caused by oil spills plays a vital role in the need to rehabilitate the marine environment and compensate the aggrieved parties. , Thesis (LLM) -- Faculty of Law, Department of Public law , 2022
- Full Text:
- Date Issued: 2022-12
Psychologists’ perceptions of the growth and change promoting factors in psychotherapy within a culturally diverse South Africa
- Authors: Heyneke, Wilmie
- Date: 2022-12
- Subjects: Psychotherapy -- South Africa , therapeutic alliance
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60155 , vital:63207
- Description: The therapeutic relationship established between a psychologist and a client is considered one of the main factors determining successful psychotherapy outcomes. While this may be the case, there remain inconsistencies in the literature and debate regarding its influence, especially when contextual factors such as diverse beliefs, may influence the therapeutic relationship. Furthermore, there is a scarcity of information focusing on psychologists’ experiences working within the culturally diverse South African context. This study aimed to better understand, from a psychologist’s perspective, the growth and change promoting factors they feel are influencing successful therapeutic outcomes within the South African context. This was pursued recognising that the diverse belief systems in South Africa, which do not always adhere to biomedical conceptualisations of health and illness, may influence the therapeutic interaction. This study explored the following research question: What are the key factors that promote growth and change in individual psychotherapy within the diverse South African context? Drawing on a qualitative approach, an explorative descriptive research design was chosen as it enabled the researcher to explore the perceptions of the participants on the given topic. The sampling technique that was employed was non-probability purposive sampling and psychologists registered with the Health Professionals Council of South Africa formed part of the sample. In-depth online interviewing was employed as the data collection tool, using online platforms like Microsoft Teams and Zoom. Data were analysed using Braun and Clarke’s thematic analysis guidelines and themes that were identified was reported. , Thesis (MA) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Heyneke, Wilmie
- Date: 2022-12
- Subjects: Psychotherapy -- South Africa , therapeutic alliance
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60155 , vital:63207
- Description: The therapeutic relationship established between a psychologist and a client is considered one of the main factors determining successful psychotherapy outcomes. While this may be the case, there remain inconsistencies in the literature and debate regarding its influence, especially when contextual factors such as diverse beliefs, may influence the therapeutic relationship. Furthermore, there is a scarcity of information focusing on psychologists’ experiences working within the culturally diverse South African context. This study aimed to better understand, from a psychologist’s perspective, the growth and change promoting factors they feel are influencing successful therapeutic outcomes within the South African context. This was pursued recognising that the diverse belief systems in South Africa, which do not always adhere to biomedical conceptualisations of health and illness, may influence the therapeutic interaction. This study explored the following research question: What are the key factors that promote growth and change in individual psychotherapy within the diverse South African context? Drawing on a qualitative approach, an explorative descriptive research design was chosen as it enabled the researcher to explore the perceptions of the participants on the given topic. The sampling technique that was employed was non-probability purposive sampling and psychologists registered with the Health Professionals Council of South Africa formed part of the sample. In-depth online interviewing was employed as the data collection tool, using online platforms like Microsoft Teams and Zoom. Data were analysed using Braun and Clarke’s thematic analysis guidelines and themes that were identified was reported. , Thesis (MA) -- Faculty of Health Sciences, 2022
- Full Text:
- Date Issued: 2022-12
Representation of history in Tsitsi Dangarembga’s trilogy – nervous conditions, the book of not and this mournable body
- Authors: Mutsambi, Tinoten
- Date: 2022-12
- Subjects: Women and literature --Zimbabwe--History --20th century , Identification (Psychology) in literature
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59446 , vital:62116
- Description: This dissertation analyses Tsitsi Dangarembga’s novels Nervous Conditions (1988), The Book of Not (2006) and This Mournable Body (2018). The three novels under study capture a great deal of Zimbabwe’s history, spanning from the colonial era as depicted in Nervous Conditions, through the period before and after independence in The Book of Not, to the contemporary post independence Zimbabwe in This Mournable Body. Reading these three novels and analysing their depiction of historic events is important as they cover significant and contested epochs in Zimbabwean history, making it possible for us to examine the intersection between history and literature. Moreover, since most Zimbabwean narratives that depict the country’s history have been male authored, Dangarembga’s novels offer an interesting opportunity to study the depiction of history from a female perspective , Thesis (MA) -- Faculty of Humanities, School of Language, Media and Communication, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Mutsambi, Tinoten
- Date: 2022-12
- Subjects: Women and literature --Zimbabwe--History --20th century , Identification (Psychology) in literature
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59446 , vital:62116
- Description: This dissertation analyses Tsitsi Dangarembga’s novels Nervous Conditions (1988), The Book of Not (2006) and This Mournable Body (2018). The three novels under study capture a great deal of Zimbabwe’s history, spanning from the colonial era as depicted in Nervous Conditions, through the period before and after independence in The Book of Not, to the contemporary post independence Zimbabwe in This Mournable Body. Reading these three novels and analysing their depiction of historic events is important as they cover significant and contested epochs in Zimbabwean history, making it possible for us to examine the intersection between history and literature. Moreover, since most Zimbabwean narratives that depict the country’s history have been male authored, Dangarembga’s novels offer an interesting opportunity to study the depiction of history from a female perspective , Thesis (MA) -- Faculty of Humanities, School of Language, Media and Communication, 2022
- Full Text:
- Date Issued: 2022-12
Residential private property valuation accuracy in south Africa: A case study of Knysna in the Western Cape province
- Authors: Qusheka, Siphokazi
- Date: 2022-12
- Subjects: Real property -- Valuation -- Knysna , Right of property -- Knysna
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59876 , vital:62482
- Description: a Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong b Faculty of Built Environment, University of New South Wales, Sydney, Australia Property valuation end-users generally rely on property value opinion provided by valuers in making informed real estate investment decisions. However, the inaccuracy of valuation estimates could be attributed to the adoption of inappropriate property valuation methods and such inaccurate estimates could mislead real estate investors and stakeholders. This could result in individual loss and national loss due to the importance of the real estate sector to the national economy. , Thesis (MA) -- Faculty of Engineering, the Built Environment, and Technology, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Qusheka, Siphokazi
- Date: 2022-12
- Subjects: Real property -- Valuation -- Knysna , Right of property -- Knysna
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59876 , vital:62482
- Description: a Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong b Faculty of Built Environment, University of New South Wales, Sydney, Australia Property valuation end-users generally rely on property value opinion provided by valuers in making informed real estate investment decisions. However, the inaccuracy of valuation estimates could be attributed to the adoption of inappropriate property valuation methods and such inaccurate estimates could mislead real estate investors and stakeholders. This could result in individual loss and national loss due to the importance of the real estate sector to the national economy. , Thesis (MA) -- Faculty of Engineering, the Built Environment, and Technology, 2022
- Full Text:
- Date Issued: 2022-12
Selected Aspects of the Crime of Necrophilia
- Authors: Somandi, Siphuxolo
- Date: 2022-12
- Subjects: Rape , Necrophilia , Crime of Necrophilia
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60421 , vital:64874
- Description: The treatise begins by defining rape pre and post-Constitution. Through the analysis of the latter, it refers to the Masiya case, particularly in light of extending the definition of rape to align it with the spirit, purport and objects of the Bill of Rights. It further focuses on the rights that Masiya identified as being infringed upon whenever the act of rape occurs. The treatise thereafter discusses the crime of committing sexual acts with a corpse, formerly known as necrophilia. It argues that not all sexual acts with a corpse are committed with the sole purpose of having sexual intercourse with a "corpse". For an illustration of the latter, the treatise categorises the circumstances of sexual acts committed with corpses into Categories A and B and uses cases in each Category as an aid. Some of the sexual acts by perpetrators begin with the sole purpose of rape but because the rape cannot be achieved due to the resistance of the victim, the perpetrator has no choice but to overcome the resistance of the victim, which in the context of this treatise means killing the victim. The perpetrator thereafter proceeds with what was initially intended, the rape of the victim. However, in the cases considered, the perpetrator is saved by expert evidence to the effect that the victim was dead at the time of penetration and therefore the perpetrator in addition to being convicted for murder is convicted of committing a sexual act with a corpse. The treatise thus argues that not all sexual acts with a corpse are committed with the sole purpose of having sexual intercourse with the corpse. The treatise highlights the fact that a sexual act with a corpse is a crime of intention. The differing circumstances in which the said crime is committed carries with it a difference in intention and thus should be criminalised differently. This is particularly so when one considers that expert evidence is used to confirm whether or not the victim was dead or alive at the time of the sexual penetration. This confirms that the perpetrator could not have known that the victim was dead at the time of penetration and thus for all intents and purposes, the perpetrator believed he is raping the victim, who he considers to be alive. he treatise thus argues that the perpetrator cannot be saved by expert evidence that surmises that the perpetrator intended to have sexual intercourse with a corpse, the intention that the perpetrator did not carry at the time of committing the crime. The treatise further argues that because rape has been identified as a crime that infringes on human rights, these rights are not extinguished by death thus the same rights are infringed by sexual acts with a corpse. With the aid of some international authorities, the treatise argues that a Category B sexual act committed with a corpse could be criminalised under attempted rape. , Thesis (LLM) -- Faculty of Law, Department of Criminal and Procedural Law, 2022
- Full Text: false
- Date Issued: 2022-12
- Authors: Somandi, Siphuxolo
- Date: 2022-12
- Subjects: Rape , Necrophilia , Crime of Necrophilia
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60421 , vital:64874
- Description: The treatise begins by defining rape pre and post-Constitution. Through the analysis of the latter, it refers to the Masiya case, particularly in light of extending the definition of rape to align it with the spirit, purport and objects of the Bill of Rights. It further focuses on the rights that Masiya identified as being infringed upon whenever the act of rape occurs. The treatise thereafter discusses the crime of committing sexual acts with a corpse, formerly known as necrophilia. It argues that not all sexual acts with a corpse are committed with the sole purpose of having sexual intercourse with a "corpse". For an illustration of the latter, the treatise categorises the circumstances of sexual acts committed with corpses into Categories A and B and uses cases in each Category as an aid. Some of the sexual acts by perpetrators begin with the sole purpose of rape but because the rape cannot be achieved due to the resistance of the victim, the perpetrator has no choice but to overcome the resistance of the victim, which in the context of this treatise means killing the victim. The perpetrator thereafter proceeds with what was initially intended, the rape of the victim. However, in the cases considered, the perpetrator is saved by expert evidence to the effect that the victim was dead at the time of penetration and therefore the perpetrator in addition to being convicted for murder is convicted of committing a sexual act with a corpse. The treatise thus argues that not all sexual acts with a corpse are committed with the sole purpose of having sexual intercourse with the corpse. The treatise highlights the fact that a sexual act with a corpse is a crime of intention. The differing circumstances in which the said crime is committed carries with it a difference in intention and thus should be criminalised differently. This is particularly so when one considers that expert evidence is used to confirm whether or not the victim was dead or alive at the time of the sexual penetration. This confirms that the perpetrator could not have known that the victim was dead at the time of penetration and thus for all intents and purposes, the perpetrator believed he is raping the victim, who he considers to be alive. he treatise thus argues that the perpetrator cannot be saved by expert evidence that surmises that the perpetrator intended to have sexual intercourse with a corpse, the intention that the perpetrator did not carry at the time of committing the crime. The treatise further argues that because rape has been identified as a crime that infringes on human rights, these rights are not extinguished by death thus the same rights are infringed by sexual acts with a corpse. With the aid of some international authorities, the treatise argues that a Category B sexual act committed with a corpse could be criminalised under attempted rape. , Thesis (LLM) -- Faculty of Law, Department of Criminal and Procedural Law, 2022
- Full Text: false
- Date Issued: 2022-12
Service as a leadership competency at Director/CEO level
- Authors: Chilton, Ilse Mercia
- Date: 2022-12
- Subjects: Leadership Moral and ethical aspects , Servant leadership , Compassion , Humility , Integrative thinking , Critical incident technique , Transformational leadership
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/419075 , vital:71614
- Description: Given ethical failures in leadership, the actions and decisions of leaders are receiving renewed attention based on the role business plays in society. Business leaders need to demonstrate their willingness to consider their influence on society and not merely consider the demands and expectations of shareholders. Leaders must consider the ethical lens through which their decisions and actions are perceived. Service as a leadership competency can develop ethical leadership. Currently, service is not clearly defined and understood, and Pearse (2017) proposes five interrelated elements of service as a competency, namely individualised consideration, compassion, motivation to lead, humility and integrated thinking. The study examined if the five interrelated service elements are present when a leader at Director/CEO level exercises an act of service towards a follower. The study adopted a qualitative deductive thematic approach, collecting data through semi-structured interviews and using the critical incident technique to guide the interviews. The study's findings support the research proposition that service as a leadership competency consists of the five elements, but with some of these elements expanded. Service as a leadership competency is recommended to develop high-quality social relationships within an organisation, which will positively impact the corporate culture. Organisations can recruit and select leaders based on ethical leadership requirements and integrate these into performance management systems. Recommendations for further research have also been made. , Thesis (MBA) -- Faculty of Commerce, Rhodes Business School, 2023
- Full Text:
- Date Issued: 2022-12
- Authors: Chilton, Ilse Mercia
- Date: 2022-12
- Subjects: Leadership Moral and ethical aspects , Servant leadership , Compassion , Humility , Integrative thinking , Critical incident technique , Transformational leadership
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/419075 , vital:71614
- Description: Given ethical failures in leadership, the actions and decisions of leaders are receiving renewed attention based on the role business plays in society. Business leaders need to demonstrate their willingness to consider their influence on society and not merely consider the demands and expectations of shareholders. Leaders must consider the ethical lens through which their decisions and actions are perceived. Service as a leadership competency can develop ethical leadership. Currently, service is not clearly defined and understood, and Pearse (2017) proposes five interrelated elements of service as a competency, namely individualised consideration, compassion, motivation to lead, humility and integrated thinking. The study examined if the five interrelated service elements are present when a leader at Director/CEO level exercises an act of service towards a follower. The study adopted a qualitative deductive thematic approach, collecting data through semi-structured interviews and using the critical incident technique to guide the interviews. The study's findings support the research proposition that service as a leadership competency consists of the five elements, but with some of these elements expanded. Service as a leadership competency is recommended to develop high-quality social relationships within an organisation, which will positively impact the corporate culture. Organisations can recruit and select leaders based on ethical leadership requirements and integrate these into performance management systems. Recommendations for further research have also been made. , Thesis (MBA) -- Faculty of Commerce, Rhodes Business School, 2023
- Full Text:
- Date Issued: 2022-12
Spatial and temporal analysis of the critical zone in the Western rift valley corridor: towards earth stewardship science in East Africa
- Authors: Miller, Warren David
- Date: 2022-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/59771 , vital:62423
- Description: Over the coming decades, Africa is expected to experience disturbing effects due to climate change and increased land cover change due to human influences presenting a significant concern for the future well-being of human and biological systems, the latter being the foundation of ecosystem services supplied to humanity. Therefore, unprecedented transdisciplinary cooperation, coordination, and integration amongst researchers, government, and civil society are necessary to increase the resiliency of these systems. This study aims to provide an outline of the Africa Alive Corridors (AAC) as an essential model for the encouragement of sustainable development through Earth Stewardship science. These aims are accompanied by the quantification and forward modelling for land cover change of the Critical Zone over 10 Great Lake Basins across one of the AAC, the Western Rift Valley Corridor (WRVC), in East Africa between the years 2018 and 2060. This approach provides the foundation for implementing improved regional governance, better encouragement of sustainable development beyond the 2030 United Nations Sustainable Development Goals, and education programs, such as the AAC, that promote socio-ecological resilience through Earth Stewardship Science. The AAC archives a portion of East Africa as the WRVC, a corridor along the western branch of the East African Rift System that highlights twenty heritage nodes, primarily great lakes, mountain ranges, national parks, and biological hotspots. These heritage entities are associated with ca. 12-million-years of evolution and transformation of the East African topography and related African Great Lake (AGL) systems. The thesis defines the study area by delineating AGL basins intersected by the WRVC. Across these basins, land cover change analysis provides a platform for an integrated assessment of the projected health of the corridor region. Existing land cover datasets provide the initial conditions of the study area for 2008 and 2013. Land cover between 2008 and 2013 is cross-tabulated using the Land Cover Module in the Terrset software, followed by the iii delineation of sub-models and driver variable identification. The Multi-Layer Perceptron algorithm provides the transition potentials between tree cover, urban area, cropland, wetland, and open area classes. Change quantification and prediction using Markov Chain analysis are then established for 2018, 2030, and 2060. The model successfully simulated future land cover change and concluded that: (1) proximity to existing human activity, proximity to existing tree cover, and population are the primary drivers of change; (2) the dominant land cover of the ten lake basins for 2018 was cropland at ca. 48%, followed by tree cover at ca. 33%; (3) total anthropogenic change over the coming four decades equates to over ca. 52 000 km2 (5 200 000 ha), and particularly (4) an urban area is expected to increase by >130%. This assessment ultimately provides a platform for regional governance development at the basin scale and Earth Stewardship science in East Africa. These changes require transdisciplinary action from researchers to civil society. The AAC provides the foundation for understanding the dynamics of the systems that support life across broader spatial and temporal resolutions in Africa, highlighting the need for future generations to build socio-ecological resilience to anticipate challenges such as biodiversity loss posed by climate change and excessive land cover change. , Thesis (DSc) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Miller, Warren David
- Date: 2022-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/59771 , vital:62423
- Description: Over the coming decades, Africa is expected to experience disturbing effects due to climate change and increased land cover change due to human influences presenting a significant concern for the future well-being of human and biological systems, the latter being the foundation of ecosystem services supplied to humanity. Therefore, unprecedented transdisciplinary cooperation, coordination, and integration amongst researchers, government, and civil society are necessary to increase the resiliency of these systems. This study aims to provide an outline of the Africa Alive Corridors (AAC) as an essential model for the encouragement of sustainable development through Earth Stewardship science. These aims are accompanied by the quantification and forward modelling for land cover change of the Critical Zone over 10 Great Lake Basins across one of the AAC, the Western Rift Valley Corridor (WRVC), in East Africa between the years 2018 and 2060. This approach provides the foundation for implementing improved regional governance, better encouragement of sustainable development beyond the 2030 United Nations Sustainable Development Goals, and education programs, such as the AAC, that promote socio-ecological resilience through Earth Stewardship Science. The AAC archives a portion of East Africa as the WRVC, a corridor along the western branch of the East African Rift System that highlights twenty heritage nodes, primarily great lakes, mountain ranges, national parks, and biological hotspots. These heritage entities are associated with ca. 12-million-years of evolution and transformation of the East African topography and related African Great Lake (AGL) systems. The thesis defines the study area by delineating AGL basins intersected by the WRVC. Across these basins, land cover change analysis provides a platform for an integrated assessment of the projected health of the corridor region. Existing land cover datasets provide the initial conditions of the study area for 2008 and 2013. Land cover between 2008 and 2013 is cross-tabulated using the Land Cover Module in the Terrset software, followed by the iii delineation of sub-models and driver variable identification. The Multi-Layer Perceptron algorithm provides the transition potentials between tree cover, urban area, cropland, wetland, and open area classes. Change quantification and prediction using Markov Chain analysis are then established for 2018, 2030, and 2060. The model successfully simulated future land cover change and concluded that: (1) proximity to existing human activity, proximity to existing tree cover, and population are the primary drivers of change; (2) the dominant land cover of the ten lake basins for 2018 was cropland at ca. 48%, followed by tree cover at ca. 33%; (3) total anthropogenic change over the coming four decades equates to over ca. 52 000 km2 (5 200 000 ha), and particularly (4) an urban area is expected to increase by >130%. This assessment ultimately provides a platform for regional governance development at the basin scale and Earth Stewardship science in East Africa. These changes require transdisciplinary action from researchers to civil society. The AAC provides the foundation for understanding the dynamics of the systems that support life across broader spatial and temporal resolutions in Africa, highlighting the need for future generations to build socio-ecological resilience to anticipate challenges such as biodiversity loss posed by climate change and excessive land cover change. , Thesis (DSc) -- Faculty of Science, School of Environmental Sciences, 2022
- Full Text:
- Date Issued: 2022-12
Strategic architecture for quantity surveying Firms in South Africa
- Mokonenyane, Mofumahatsana Dibuseng
- Authors: Mokonenyane, Mofumahatsana Dibuseng
- Date: 2022-12
- Subjects: Sustainable architecture , Quantity surveyors
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59521 , vital:62149
- Description: Quantity surveying firms are a crucial part of the construction industry because they are involved in the financial aspects of the projects, and their role and benefits have been documented across various studies. Furthermore, they provide services such as estimating, cost control and feasibility studies in numerous industries and these services are not limited to the construction industry. They are crucial in ensuring that the project proceeds according to budget, quality and time. Despite the noted benefits of quantity surveying firms, there has been a noticeable decline in the survival rate of the firms over the past ten years. It has been documented that several external and internal environmental factors affect the firms and thus have caused a decline in the survival rate. The volatility of internal and external forces that affect the industry has formed the basis of this study. Previous studies have failed to highlight the strategies to reduce threats and utilise opportunities. This study aims to establish common internal and external environmental factors affecting quantity surveying firms and determine these firms’ strategic architecture. A qualitative study was conducted using semi-structured interviews to assess the internal and external environment and strategic nature of Quantity surveying firms. In addition, a thematic analysis was administered to identify themes. The themes that arose from the external business environment were technology, political instability, tendering irregularities, lack of availability of work and the practice of green building. The technology theme highlighted the respondents’ views of the technological environment and the role of BIM and other software. Tendering irregularities threatened prospective tenderpreneurs as the respondents viewed the process as flawed and requiring better regulation. Lack of work was highlighted as a further factor. Although not many respondents mentioned this theme, green building is an emerging theme within the South African market. Two main themes were identified in the internal business environment: fee discounting and human resources. Fee discounting refers to the reduction of fees to secure work, while human resources were highlighted as an important factor and are regarded as the fuel that keeps the organisation running. Owing to the varying nature of factors within the external and internal business environment, it was concluded that there is no formal generic strategy that can be utilised to mitigate internal and external environmental factors. The client relationships were highlighted as an important factor, while client relationships were discussed under the balanced scorecard section of the study. The two main themes derived from the balanced scorecard were the financial perspective and client relationships under customer. Increased revenue per customer and venturing into new markets were the main themes mentioned within the financial perspective. The importance of nurturing client relationships was identified as an important factor under the customer section of the balanced scorecard. iii | P a g e The findings of this study will assist the stakeholders within the built environment in determining common internal and external environmental issues facing the industry. The recommendation will assist stakeholders in establishing probable solutions that can be implemented to overcome these challenges. , Thesis (MA) -- Faculty of Engineering, the Built Environment, and Technology, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Mokonenyane, Mofumahatsana Dibuseng
- Date: 2022-12
- Subjects: Sustainable architecture , Quantity surveyors
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/59521 , vital:62149
- Description: Quantity surveying firms are a crucial part of the construction industry because they are involved in the financial aspects of the projects, and their role and benefits have been documented across various studies. Furthermore, they provide services such as estimating, cost control and feasibility studies in numerous industries and these services are not limited to the construction industry. They are crucial in ensuring that the project proceeds according to budget, quality and time. Despite the noted benefits of quantity surveying firms, there has been a noticeable decline in the survival rate of the firms over the past ten years. It has been documented that several external and internal environmental factors affect the firms and thus have caused a decline in the survival rate. The volatility of internal and external forces that affect the industry has formed the basis of this study. Previous studies have failed to highlight the strategies to reduce threats and utilise opportunities. This study aims to establish common internal and external environmental factors affecting quantity surveying firms and determine these firms’ strategic architecture. A qualitative study was conducted using semi-structured interviews to assess the internal and external environment and strategic nature of Quantity surveying firms. In addition, a thematic analysis was administered to identify themes. The themes that arose from the external business environment were technology, political instability, tendering irregularities, lack of availability of work and the practice of green building. The technology theme highlighted the respondents’ views of the technological environment and the role of BIM and other software. Tendering irregularities threatened prospective tenderpreneurs as the respondents viewed the process as flawed and requiring better regulation. Lack of work was highlighted as a further factor. Although not many respondents mentioned this theme, green building is an emerging theme within the South African market. Two main themes were identified in the internal business environment: fee discounting and human resources. Fee discounting refers to the reduction of fees to secure work, while human resources were highlighted as an important factor and are regarded as the fuel that keeps the organisation running. Owing to the varying nature of factors within the external and internal business environment, it was concluded that there is no formal generic strategy that can be utilised to mitigate internal and external environmental factors. The client relationships were highlighted as an important factor, while client relationships were discussed under the balanced scorecard section of the study. The two main themes derived from the balanced scorecard were the financial perspective and client relationships under customer. Increased revenue per customer and venturing into new markets were the main themes mentioned within the financial perspective. The importance of nurturing client relationships was identified as an important factor under the customer section of the balanced scorecard. iii | P a g e The findings of this study will assist the stakeholders within the built environment in determining common internal and external environmental issues facing the industry. The recommendation will assist stakeholders in establishing probable solutions that can be implemented to overcome these challenges. , Thesis (MA) -- Faculty of Engineering, the Built Environment, and Technology, 2022
- Full Text:
- Date Issued: 2022-12
Termination of employment in the public service sector: the constitutionality of the deeming provisions
- Authors: Mbewana, Inga
- Date: 2022-12
- Subjects: unfair labor practices--South Africa , labor law and legislation--South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60080 , vital:62940
- Description: In terms of the South African Public Service Act,1 an employee who absents him- /herself from official duties without permission of his or her head of department, office or institution for a period exceeding one calendar month is deemed to have been discharged by operation of law. A similar provision can also be found in section 14 of the Employment of Educators Act,2 which expressly refers to fourteen (14) consecutive day’s unauthorised absence as opposed to thirty (30) days. Employees whose services have been terminated by operation of law are deprived an opportunity to defend themselves prior to the dismissal as prescribed by the Labour Relations Act3 (LRA). South African courts have grappled with several cases relating to dismissal by operation of law in the public service. The nature of these provisions is such that employees in the public sector are discharged from their duties without any hearing to offer them the opportunity to state their side and/or give a reasonable explanation for their absence. These provisions will thus be referred to herein as “the deeming provisions”. The deeming provisions provide that the discharge / dismissal is “on account of misconduct” however, it does not provide for a pre-dismissal procedure that is to be followed when dismissal is on account of misconduct, as prescribed by the LRA. It has been settled in our law that dismissal by operation of law is not dismissal for the purposes of the LRA. The employees dismissed by operation of law are regarded as if they are not entitled to a hearing. The right to fair labour practices protects everyone including public sector employees, 4 and such right is given effect to by way of enactment of the LRA. The LRA serves to protect public sector employees except where the exclusion is specified. This treatise seeks to challenge the necessity and constitutionality of the deeming provisions on the basis of its contravention of the constitutional right to fair labour practices. , Thesis (LLM) -- Faculty of Law, Department of Mercantile law, 2022
- Full Text:
- Date Issued: 2022-12
- Authors: Mbewana, Inga
- Date: 2022-12
- Subjects: unfair labor practices--South Africa , labor law and legislation--South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/60080 , vital:62940
- Description: In terms of the South African Public Service Act,1 an employee who absents him- /herself from official duties without permission of his or her head of department, office or institution for a period exceeding one calendar month is deemed to have been discharged by operation of law. A similar provision can also be found in section 14 of the Employment of Educators Act,2 which expressly refers to fourteen (14) consecutive day’s unauthorised absence as opposed to thirty (30) days. Employees whose services have been terminated by operation of law are deprived an opportunity to defend themselves prior to the dismissal as prescribed by the Labour Relations Act3 (LRA). South African courts have grappled with several cases relating to dismissal by operation of law in the public service. The nature of these provisions is such that employees in the public sector are discharged from their duties without any hearing to offer them the opportunity to state their side and/or give a reasonable explanation for their absence. These provisions will thus be referred to herein as “the deeming provisions”. The deeming provisions provide that the discharge / dismissal is “on account of misconduct” however, it does not provide for a pre-dismissal procedure that is to be followed when dismissal is on account of misconduct, as prescribed by the LRA. It has been settled in our law that dismissal by operation of law is not dismissal for the purposes of the LRA. The employees dismissed by operation of law are regarded as if they are not entitled to a hearing. The right to fair labour practices protects everyone including public sector employees, 4 and such right is given effect to by way of enactment of the LRA. The LRA serves to protect public sector employees except where the exclusion is specified. This treatise seeks to challenge the necessity and constitutionality of the deeming provisions on the basis of its contravention of the constitutional right to fair labour practices. , Thesis (LLM) -- Faculty of Law, Department of Mercantile law, 2022
- Full Text:
- Date Issued: 2022-12