List of Titles

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Large mammalian fauna of the Palaeo-Agulhas Plain: predicting habitat use and range distribution

- Brooke, Christopher F

Authors: Brooke, Christopher F
Date: 2021-04
Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Herbivores
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10948/52332 , vital:43590
Description: Understanding the variations in structure and abundance of animals and what leads to their distribution within the landscape has captured the attention of ecologists for centuries. Importantly, knowledge of current behaviour of large mammals can be used to inform historic population dynamics and is essential to understanding how early humans used large mammals as a foraging resource. Central to this thesis and improving our understanding of large herbivores is the Palaeo-Agulhas Plain (PAP) where large mammalian herbivores formed a key food resource for early humans. The PAP, now submerged off the southern Cape of South Africa, formed a novel ecosystem during lower sea levels. Characterised by large expanses of nutrient rich grasslands and large grazing herbivores, the PAP stands in stark contrast to the nutrient poor fynbos ecosystems that is in the southern Cape today. In this thesis I focus on the Last Glacial Maximum (LGM; ~20 ka) when the PAP was last fully exposed to answer questions relating to the habitat use and range distribution of large herbivores. Importantly, through the Paleoscape Project, modelled climate, soil and vegetation have made these recreations of large mammals possible. Using modelled climate and vegetation this thesis aims to model the large herbivore communities and understand the influence of early humans on the PAP during the LGM for successful integration into the PaleoscapeABM (the PAP agent-based model). To improve our understanding of large mammals on the PAP I identified five large herbivores that became extinct on the PAP since the LGM and modelled their behavioural and physical traits using k-Nearest Neighbour imputation. I predicted the biomass of large herbivores across the PAP using actual biomass of large herbivores from 39 protected areas across South Africa (spanning five functional groups to include the extinct species) across a rainfall gradient and different biomes. The distribution of large herbivores would likely have been driven by similar top-down and bottom-up drivers we see in large herbivore ecology today. Knowing this, I created a predictive model for large mammals by predicting the probability of occurrence of functional groups of large herbivores in relation to environmental drivers and humans. Results showed that all species (except Antidorcas australis) were adapted to the grassy environment of the PAP and these specialisations likely contributed to their extinction along with changing climates and intensified hunting from humans. When predicting herbivore viii biomass, biome was the most important factor influencing the relationship between herbivores and rainfall. In general, large herbivore biomass increased with rainfall across biomes, except for grassland. Finally, I showed the probability of occurrence of large herbivores was influenced by early humans, water availability and a landscape of fear on the PAP. Through this thesis I have successfully provided detailed accounts of the biomass and probability of occurrence of large herbivores on the PAP. Importantly, this information can be seamlessly integrated into the PaleoscapeABM. Finally, I highlight the importance of this knowledge in understanding early humans, the potential shortcomings of this study and resulting areas where research needs to be focused. , Thesis (PhD) -- Faculty of Science, School of Natural Resource Management, 2021
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Date Issued: 2021-04

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Larval fish dynamics within the coastal nearshore of the Eastern Cape, South Africa

- Sotshongaye, Oko

Authors: Sotshongaye, Oko
Date: 2021-04
Subjects: Fishes -- Larvae -- South Africa -- Eastern Cape , Fishes -- Larvae -- Development -- South Africa -- Eastern Cape , Fishes -- Larvae -- Ecology -- South Africa -- Eastern Cape , Coastal ecology -- South Africa -- Eastern Cape , Fishes -- Larvae -- Dispersal -- South Africa -- Eastern Cape
Language: English
Type: thesis , text , Masters , MSc
Identifier: http://hdl.handle.net/10962/176977 , vital:42776
Description: The coastal nearshore is important for the early development of fishes as it is used for spawning and/or as a nursery. One of the central concerns in coastal ecology is understanding the role of the nearshore for larvae, ultimately providing key knowledge on population dynamics and hence helping in making decisions pertaining to conservation and resource management. The aim of this study was to investigate the alongshore and cross-shore distribution of larval fishes and the links to the physio-chemical conditions (including prevailing winds) and hydrodynamics in the region of Algoa Bay, situated on the south east coast in the warm temperate region of South Africa. Fish larvae were sampled at nine sites for the first component of the study (January 2016 –March 2017) and at four sites for the second component (November 2019), near the surface and bottom (15-50 m) of the water column as well as at two different distances from shore (~400 m/~3 km) using a set of bongo plankton nets towed behind a boat. Environmental data were simultaneously collected using and acoustic Doppler current profiler (ADCP) and conductivity, temperature, depth (CTD) profiler. Larval fish abundance generally decreased with increasing distance from the shore, however, this varied in space and time, with some larval species recorded in high abundances offshore. Close inshore the larvae of coastal fish species producing benthic eggs (CBE) including the Blenniidae and Gobiesocidae mostly dominated, while offshore the larvae of coastal fish species producing pelagic eggs (CPE) i.e. Sparidae and Cynoglossidae, as well as pelagic fish species producing pelagic eggs (PPE) i.e. Clupeidae and Engraulidae mostly dominated. Vertical distribution of larvae differed according to taxon, with the Callionymidae (CPE), Cynoglossidae and Gobiesocidae occurring at high densities at the bottom of the water column, while the Blenniidae dominated near the surface. Fluorescence, temperature and salinity varied with depth (surface/bottom), being particularly high at the surface; currents moved faster at the surface than the bottom of the water column. Increased abundances of larval fishes were evident after upwelling events (associated with easterly winds) in the Bay, while during downwelling (associated with westerly winds), low densities were generally recorded, except for the sites situated near headlands/capes where there were higher densities of fish larvae during downwelling events. Overall, the results of this study suggest that spawning mode of the adults, oceanography and environmental conditions coupled with what is known of the behaviour of fish larvae, were important in shaping the larval fish community of the Algoa Bay region. These results highlight the importance of incorporating multiple biological (developmental stage, reproductive mode, species) and physical (currents, fluorescence, wind-driven up/down-welling) factors when addressing the mechanims of transport of larval fish in the coastal nearshore. , Thesis (MSc) -- Faculty of Science, Department of Zoology and Entomology, 2021
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Date Issued: 2021-04

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Linking agrochemical pollution with the aquatic ecological integrity of the Twee River Catchment, Western Cape

- Brink, Zanné

Authors: Brink, Zanné
Date: 2021-04
Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Ecological integrity
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10948/52326 , vital:43588
Description: This study was initiated in the Twee River system due to the threat posed by agrochemicals on the occurrence of the endemic and endangered fish species found within the catchment. Poor knowledge and understanding of the environmental effects of fertilizers, pesticides and other agrochemicals among small and large commercial farmers within the study area, in combination with their intensive use may have resulted in chemical contamination above environmentally safe concentrations. Numerous studies have highlighted the fact that more research needs to be conducted to identify the key threats to the continued existence of specifically the Critically Endangered Sedercypris erubescens. The overall aim of this study was to determine the spatial and temporal patterns in aquatic ecosystem diversity in the Twee River catchment as indicated by macroinvertebrate and native fish distribution and abundance. It was further investigated if there was a link between agrochemical pollution and the aquatic ecological integrity of the Twee River catchment. Selected sampling sites were identified and sampled to determine the presence and concentration of pesticides entering the water of the Twee River system during run-off and event-based spraying. Furthermore, the effect of these pesticides on the distribution and abundance of the aquatic biota were determined using SASS5 for the macroinvertebrate populations and visually sampling the distribution of the native and non-native fish in the Twee River catchment. This study supports suggestions made by previous studies, that sub-lethal to lethal concentrations of insecticides could be a threat to the long-term survival of benthic macroinvertebrates and potentially the more sensitive endemic fish species within the Twee River system. More focussed research is needed to address impacts of pesticides within this catchment. Agricultural and conservation efforts should be aimed at developing of a shared vision amongst stakeholders, to allow for the longterm conservation of the endemic fish of the Twee River. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
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Date Issued: 2021-04

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Local economic development in the rural town of Butterworth, Mnquma Municipality, 1997-2013

- Magengelele, Mkhuseli

Authors: Magengelele, Mkhuseli
Date: 2021-04
Subjects: Rural development -- South Africa -- Eastern Cape -- Management , Economic development projects -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10948/51809 , vital:43374
Description: The purpose of this study is to investigate how Local Economic Development (LED) in Mnquma, with a particular focus on Butterworth, has impacted the alleviation of inequality, underdevelopment and poverty among the poorest of the poor. The aim of the literature review is to analyse the existing knowledge about LED, its impact in the alleviation of inequality, underdevelopment and poverty among the poorest of the poor and the tangible concrete pointer that shows that all key sector role-players are participating in LED. This study is qualitative in nature and employs a case study as the research design. The convenience sampling technique was used to select seven municipal workers and eight members of the community, giving a total of 14 participants. An open-ended interview schedule was used for the face-to-face in-depth interviews in order to collect data from the participants. Collected data was thematically analysed and raw data put set into meaningful segments, codes and categories. Themes were drawn from the responses of the participants and analysed. Some of the findings were that Butterworth municipality was seen as having both urban and rural features. On the other hand, it was found that the municipality did nothing to provide basic services to the people, the towns were dirty and streets lights were not working, there was insufficient representation based on the number of councillors elected under the Mnquma Local Municipality, municipality councillors lack skills, do not give feedback to the communities and need to be capacitated. The study also found that: ward committee members are less involved in the governance of the local municipality; there is a prevalence of high level unemployment and poverty in the municipality. However, there are various expanded Public Works Programmes currently going on in the municipality. The researcher made some recommendations to ensure effective LED with regard to the alleviation of inequality, underdevelopment and poverty among the poorest of the poor of the Mnquma area in the Butterworth municipality. , Thesis (MA) -- Faculty of Business and Economic Sciences, Development Studies, 2021
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Date Issued: 2021-04

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Making Sense of Barkhuizen 2 : An Investigation into the Public Policy Defence of ‘Unfair Enforcement’ in South African Law, with Reference to the Law on Covenants in Restraint of Trade

- Moroeng, Tsukudu Kenyatta

Authors: Moroeng, Tsukudu Kenyatta
Date: 2021-04
Subjects: Restraint of trade -- South Africa , Public policy (Law) -- South Africa , Contracts (Roman-Dutch law) , Customary law -- South Africa , Barkhuizen v Napier
Language: English
Type: thesis , text , Masters , LLM
Identifier: http://hdl.handle.net/10962/177147 , vital:42794
Description: This thesis investigates the application of the public policy test for determining the enforceability of a valid contractual clause established in Barkhuizen v Napier. After analysing the historical development of the application of the doctrine of public policy, the study examines the conceptualisation and application of the public policy test in the leading cases in South Africa. The study then provides an analysis of the recent judgment of Beadica 231 CC and Others v Trustees for the time being of the Oregon Trust and Others, which outlined the current legal position on the proper constitutional approach to the judicial enforcement of valid contractual clauses. The study argues that, although the Constitutional Court in Beadica provided some clarity on what public policy is in modern South African law, it did not, from a practical point of view, set out the method that should be used to adjudicate such cases. The study thereafter suggests that, to address this issue, our courts should consider developing a methodological approach to measuring public policy in unfair enforcement cases. To support this proposition, the study examines the law on determining the enforcement of restraint of trade agreements. It is argued that, within that context, the courts have formulated a methodological approach in the form of a list of standard questions that a judge should ask when determining the enforceability of a restraint clause. The thesis then closes with a case study, using guidelines established from the approach in restraint cases, to illustrate how the proposed guideline may be formulated, and how it could be applied in general unfair enforcement cases. The thesis argues that a practical guide of this nature would serve as a useful tool for judges to use when faced with a claim relating to the unfair enforcement of a valid clause other than a restraint clause, and would thus ensure consistency in contractual enforcement analysis in South Africa. , Thesis (LLM) -- Faculty of Law, Law, 2021
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Date Issued: 2021-04

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Motivation to learn science and make sense of the concept of malleability through the traditional blast furnace in a grade 9 Physical Science class

- Kudumo, Wilfred Peter

Authors: Kudumo, Wilfred Peter
Date: 2021-04
Subjects: Science -- Study and teaching (Secondary) -- Namibia -- Kavango West , Metals -- Effect of high temperatures on , Blast furnaces , Ethnoscience -- Namibia -- Kavango West , Ubuntu (Philosophy) , Culturally relevant pedagogy , Motivation in education -- Namibia -- Kavango West , Continuity Argumentative Theory (CAT)
Language: English
Type: thesis , text , Masters , MEd
Identifier: http://hdl.handle.net/10962/177262 , vital:42804
Description: The current situation of teaching and learning science in Namibia is of great concern since it does not seem to take into consideration learners’ socio-cultural backgrounds. As a result, learners are finding that science is not relevant to their everyday life experiences and hence are not motivated to learn it. This is compounded in part by the fact that the Namibian curriculum seems to be silent on how science teachers should include learners’ socio-cultural backgrounds, for example, local or indigenous knowledge in their teaching repertoires. It is against this background that in this study I explored how mobilising the cultural practice of a traditional blast furnace (mudukuto) as an approach enables and/or constrains learners’ motivation to learn science and make sense of the concept of malleability. This is a qualitative case study underpinned by a combination of interpretive and Ubuntu paradigms. It was carried out in a rural school in Namibia, Kavango West Region, where I am currently teaching. The participants in the study were grade 9 learners and one expert community member. Focus group interviews, participatory observation, learners’ reflections, and stimulated recall interviews were used to gather qualitative data. Vygotsky’s socio-cultural theory was used as a theoretical framework and Ogunniyi`s Continuity Argumentative Theory (CAT) was used as analytical framework or lens to analyse the data. A thematic approach to analyse data was employed. That is, qualitative data were analysed inductively to come up with sub-themes and themes. The findings of the study revealed that the traditional furnace motivated the learners involved in this study to learn science and learners were able to extract science concepts on malleability from the traditional practice. The implication for this study is that when science is related to learners’ daily life or real-world experiences, they are enabled to bridge the gap from what they learn at home or in the community with school science. The study thus recommends that teachers should make an effort to integrate local or indigenous knowledge and practices to make science accessible and relevant in their classrooms. , Thesis (MEd) -- Faculty of Education, Education, 2021
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Date Issued: 2021-04

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National minimum wage : a comparative study between Germany and South Africa

- Tshete, Vusumzi Victor

Authors: Tshete, Vusumzi Victor
Date: 2021-04
Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Minimum wage--Law and legislation
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10948/51183 , vital:43227
Description: This comparative research study attempted to provide the comparative analysis between the Germany’s MiLoG and the South African NMWA. The study has adopted the ILO definition of the Minimum Wage as the minimum amount of remuneration that an employer is required to pay wage earners for the work performed during a given period, which cannot be reduced by a collective agreement or an individual contract The Desk review was an appropriate data collection method for the present research studies. Desk research refers to secondary data that was collected without fieldwork. This included reviewal of libraries and the internet, that includes Journals; newspapers; clippings; reports; government statistics; dictionaries; books, On-line databases, Internet sources, legislations and case laws. The multiple research questions that will be addressed by the study question involve the regulation of the implementation of the NMW, the effectiveness and efficiency of the implementation of the NMW between South Africa and Germany, the impact of the NMW in addressing inequality, poverty and unemployment or socio-economic challenges, as well the overall role of the NMW in the entire labour between the two countries. The present study conducted a literature review on the historical development of the Minimum Wage in South Africa and Germany, the legislative framework around the Minimum Wage in both countries. The literature review also covered the impact of NMW on poverty alleviation and Wage inequalities. The literature further covered, the differences between the implementation of the MiLoG in the case of Germany and the NMWA in the case of South Africa. The literature also covered adjusting amendment and monitoring compliance including the best practices. The findings of the study is that the overarching purpose of introducing a NMW had multi- faceted purpose function such as of transforming the country’s inordinately unequal wage structure while at the same time redressing the inherent poverty, inequalities and transformation of the unequal wage structures both in South Africa and Germany. The Minimum Wage is implemented to prevent workers from earning very low wages. In both 3 countries the Minimum Wage is backed by the legislative framework. Processes to measure and enforce compliance are prevalent in both countries; however, the study found that it is very sophisticated to estimate the exact extent of non-compliance. The study further revealed that the effectiveness of Minimum Wages was seen to depend entirely on their policy design, implementation, and adoption as well as compliance measures. The success of the Minimum Wage solely depend on the compliance rate by employers, hence the study recommends that the New Minimum Wage legislation needs to ensure higher rates of compliance. The effective Minimum Wage should put measures in place to ensure that the compliance enforcement measures are practically implemented. A room still exists for both countries to mitigate wage inequalities that will benefit mostly the vulnerable employees. The study revealed that the NMW Commission needs to be capacitated with resources. A need of recruiting highly qualified inspectors was identified in order to strengthen the process of monitoring and ensuring compliance. The study further revealed that the appropriate Minimum Wage needs a collaborative participation of all stakeholders such as employers, the state, employees, trade unions, employer’s organization, bargaining councils, the member of public in order to achieve its professed mandate. , Thesis (LLM) -- Faculty of Law, Mercantile Law, 2021
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Date Issued: 2021-04

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Nature conservation, protected areas and local communities : the Tsitsikamma National Park

- Le Fleur, Yvette Adele

Authors: Le Fleur, Yvette Adele
Date: 2021-04
Subjects: National parks and reserves -- South Africa -- Eastern Cape , Protected areas -- Management , Programme of Work on Protected Areas , Human ecology -- South Africa -- Tsitsikamma , Nature conservation -- Citizen participation
Language: English
Type: thesis , text , Masters , MSocSc
Identifier: http://hdl.handle.net/10962/177247 , vital:42803
Description: Since the twentieth century, protected areas, usually in the form of nature reserves or national parks, have become increasingly more dominant as an international conservation strategy. An important factor in protected area management is the relationship between protected areas and its surrounding communities. Historically, the fortress conservation model based on the exclusion of human use and occupation prevailed in relation to protected areas. It is known that this approach brought with it many social and environmental injustices to local communities living in or adjacent to parks. However, a shift in conservation thinking occurred towards the end of the twentieth century, where it has increasingly been advocated for a more participatory approach in protected area management. South Africa has signed the international Convention on Biological Diversity that promotes a participatory approach to nature conservation, which is also reflected in the country’s national laws and policies. In relation to the literature and the lens of political ecology, this thesis sets out to assess in what ways and to what extent the participatory approach has been embraced by South Africa’s conservation authorities. As a case study, it looks at the Tsitsikamma National P ark ( incorporated into the larger Garden Route National Park). In order to get insight on h ow the participatory approach plays itself out at the T NP and what the nature of local communities’ relationship with the park is, this study looks at the aspects of (1) local communities’ socio-economic conditions, (2) their relationship with their natural environment, (3) their perception of nature conservation and (4) their perception of tourism. Then, taking all these aspects into account, (5) how local communities, in general, perceive their relationship with the p ark and its authorities. This study looked at the communities of Kurland, Nature’s Valley, Covie and Storms River. It shows in concurrence with other studies, that despite progressive laws and policies that express the intention of the South African state and SANParks to embrace the participatory approach, its implementation o n t he g round is riddled with challenges. , Thesis (MSocSc) -- Faculty of Humanities, Athropology, 2021
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Date Issued: 2021-04

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Ndiyazi ukuba ndiza kufa njani : ingqokelela yemibongo

- Mdliva, Mqhubi Given

Authors: Mdliva, Mqhubi Given
Date: 2021-04
Subjects: Creative writing (Higher education) -- South Africa , Xhosa poetry -- 21st century , Xhosa poetry -- History and criticism , Diaries -- Authorship , Xhosa fiction -- 21st century
Language: Xhosa
Type: thesis , text , Masters , MA
Identifier: http://hdl.handle.net/10962/178295 , vital:42928
Description: Le mibongo inyathela kwizinto ezitsarhayo; ukufa, ukukhula kweziganeko ezingobundlobongela obuphathelele kwezesondo nesini, kubulawa abantwana namanina ngamadoda norhwaphilizo olugqugqisayo. Lo msebenzi uphonononga ukwavavanya ukusetyenziswa kweempawu zokubhala kungalandelwa miqathango yokubhala koko kusetyenziswa ezi mpawu njengezixhobo zokuphuhlisa iimvakalelo zembongi. Ezi mpawu ziquka iidesh, iikholoni, iisemikholoni ukuqelelaniswa kwamagama kukwashiywa nezikhewu phakathi kwamagama kukhokelwa ngumoya wemibongo. Oku kubangele ukuba le mibongo ibe nezakhiwo ezahlukileyo nezingaqhelekanga kubhalo lwesiXhosa. Oko kukuthi, lo msebenzi utyebisa uncwadi lwesiXhosa ngokukwandisa kule ndlela ingaqhelekanga yokubhala. Umsebenzi kaSt E.P. Yako ube nefuthe kakhulu kulo msebenzi, ngakumbi indlela alusebenzise ngayo ulwimi oluteketeke zizafobe nemifanekiso ukubhala imibongo njengoko enzile kumbongo othi, Izibongo zikaMhlekazi uArchie Sandile. Kumbhali uMarina Tsvetaete kubolekwe indlela ayisebenzise ngayo imifanekiso kumbongo osihloko sithi, Poems for Block kuba udubula ngegama uthi thaa umfanekiso kwingqondo yomfundi. Isimbo sokuyila isakhiwo sombongo sikaSimphiwe Nolutshungu naso sibe nefuthe kule mibongo, kwaye le thisisi yandisa apho lo kaNolutshungu aphele khona ngakumbi kwindlela asebenzise ngayo iimpawu zokubhala. , Thesis (MA) -- Faculty of Humanities, School of Languages and Literatures, 2021
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Date Issued: 2021-04

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Night-time gravity waves detected with multi-frequency airglow imager

- Machubeng, Karabo Pebane

Authors: Machubeng, Karabo Pebane
Date: 2021-04
Subjects: Gravity waves , Airglow , Gravity waves -- Seasonal variations , All Sky Imager
Language: English
Type: thesis , text , Masters , MSc
Identifier: http://hdl.handle.net/10962/178341 , vital:42931
Description: This thesis shows the statistics of atmospheric gravity waves (AGWs) observed in the OI emission 557.7 nm at _97 km altitude using an all-sky imager based in Sutherland, South Africa (32.37_ S, 20.81_ E) in the year 2017. The wavelengths were determined using the propagation vector method, velocity was determined using the cross correlation of 1D FFT and the period was determined using the equation that relates wavelength and velocity. It was found that the horizontal wavelength in summer was almost evenly distributed between 10 and 40 km and for autumn, winter and spring were mostly between 10 and 30 km. The favoured speeds were between 40 and 50 m/s in autumn, as well as 30 and 50 m/s in summer, but the AGWs in winter had a bimodal speed distribution of 20 - 40 and 50 - 70 m/s. The majority of periods observed in all seasons were less than 20 minutes with a dominant peak of 5 - 10 minutes in autumn and spring. There was no favoured propagation direction for spring, but AGWs favoured a southeastward propagation in summer, and a southward propagation in autumn and winter. , Thesis (MSc) -- Faculty of Science, Physics and Electronics, 2021
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Date Issued: 2021-04

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Observations of cosmic re-ionisation with the Hydrogen Epoch of Reionization Array: simulations of closure phase spectra

- Charles, Ntsikelelo

Authors: Charles, Ntsikelelo
Date: 2021-04
Subjects: Epoch of reionization , Space interferometry , Astronomy -- Observations , Closure phase spectra
Language: English
Type: thesis , text , Masters , MSc
Identifier: http://hdl.handle.net/10962/174470 , vital:42480
Description: The 21 cm transition from neutral Hydrogen promises to be the best observational probe of the Epoch of Reionisation. It has driven the construction of the new generation of low frequency radio interferometric arrays, including the Hydrogen Epoch of Reionization Array (HERA). The main difficulty in measuring the 21 cm signal is the presence of bright foregrounds that require very accurate interferometric calibration. Thyagarajan et al. (2018) proposed the use of closure phase quantities as a means to detect the 21 cm signal, which has the advantage of being independent (to first order) from calibration errors and therefore, bypasses the need for accurate calibration. Closure phases are, however, affected by so-called direction dependent effects, e.g. the fact that the dishes - or antennas - of an interferometric array are not identical to each other and , therefore, yield different antenna primary beam responses. In this thesis, we investigate the impact of direction dependent effects on closure quantities and simulate the impact that primary antenna beams affected by mutual coupling have on the foreground closure phase and its power spectrum i.e. the power spectrum of the bispectrum phase (Thyagarajan et al., 2020). Our simulations show that primary beams affected by mutual coupling lead to an overall leakage of foreground power in the so-called EoR window, i.e. power from smooth-spectrum foregrounds is confined to low k modes. We quantified this effect and found that the leakage is up to ~ 8 orders magnitude higher than the case of an ideal beam at kǁ > 0:5 h Mpc-1. We also found that the foreground leakage is worse when edge antennas are included, as they have a more different primary beam compared to antennas at the centre of the array. The leakage magnitude is worse when bright foregrounds appear in the antenna sidelobes, as expected. Our simulations provide a useful framework to interpret observations and assess which power spectrum region is expected to be most contaminated by foreground power leakage.
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Date Issued: 2021-04

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Overall experience of expatriate TEFL teachers in China using positive and negative affectivity

- Berman, Gabriella Kirsty

Authors: Berman, Gabriella Kirsty
Date: 2021-04
Subjects: English language -- Study and teaching -- Foreign speakers , English language -- Study and teaching -- Foreign countries , Teachers, Foreign -- China
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10948/50955 , vital:43175
Description: Mirroring the growth in the global population, there is a growth in unemployment and due to the current global COVID-19 pandemic, unemployment statistics are set to soar. In many countries, the lack of quality working opportunities results in qualified, educated and trained people (often the youth) opting to emigrate in order to pursue better quality jobs as well as to increase their standard of living and reduce their socio-economic costs, known as the “brain drain” phenomenon. While there are many work opportunities which youth are pursuing, teaching English as a Foreign Language (TEFL) in a foreign country has become a very popular option, specifically in China. According to the Experience Model by Pine and Gilmore, the overall experience an individual has will be impacted by different factors, with the experience of being a foreign TEFL teacher in China being no exception. Furthermore, following the principles of human affectivity, the individual’s personal disposition or affectivity towards the activity will also influence their experience. It is therefore of interest to distinguish which factors influence the overall experience of teaching TEFL in China. From the comprehensive literature reviews, a proposed theoretical framework was constructed to identify the influence which social influences, work environment, location, cultural aspects, monetary benefits and non-monetary benefits (independent variables) have on the overall experience of teaching TEFL in China (independent variable). Six sets of hypotheses were formulated relating to the identified variables and through empirical research, it was decided whether the hypotheses of this study were accepted or rejected. In order to establish the influence of the independent variables on the dependent variable of this study, empirical research was conducted. The study employed a positivistic paradigm and a quantitative approach. The sample population of this study was TEFL teachers, who were teaching in China, during the time of the study. Due to the fact that no true sample frame exists for TEFL teachers who are working in China, non-probability sampling, more specifically, convenience sampling, was used to select respondents. Respondents were reached through online social media platforms. For the purpose of this study, online surveys were utilised as a data collection method and the specific data collection instrument was a web-based self-administered questionnaire. Section A of the questionnaire was used to collect the demographic data of the respondents, while Section B – Section G related to the variables of the study. A total of 379 usable questionnaires were received from a possible 479 respondents, indicating an 80.2% response rate. The study made use of descriptive (measure of central tendency as well as standard deviation and skewness of the data set) as well as inferential (Spearman’s correlation coefficient, ANOVA’s, Tukey Test, Cohen’s d, Kruskal-Wallis test and ordinal regression) statistics to interpret the raw data quantitatively, which was graphically illustrated. The empirical investigation conducted in this study between the variables, and sub-variables, revealed significant relationships between social influences (the presence of an expat community, the potential influence of a language barrier, acceptance by locals, access to healthcare), work environment (the work conditions of the TEFL teacher, specific working hours), location (the standard of accommodation provide, the specific city in which the TEFL teacher works and resides), cultural aspects (the lifestyle TEFL teachers are known to have, increased tourism opportunity), monetary benefits, and nonmonetary benefits and the overall experience of teaching TEFL in China. Within this study, the independent variables social influences, work environment, location cultural aspects and monetary benefits presented the highest correlation with the dependent variable, the overall experience of teaching TEFL in China. Additionally, of the above-mentioned variables, it was established that respondents with a higher monetary benefits factor score, were 3.64 times more likely to have a more positive overall experience, while respondents with a higher social influences factor score, were 2.80 times more likely to have a more positive overall experience. Based on the empirical findings, and corresponding literature findings, of this study, recommendations were provided to both aspiring TEFL teachers as well as to the institution in China who employ expatriate TEFL teachers regarding the variables of this study. The limitations of this study comprised of a lack of time; minimal budget; slow questionnaire response or access to respondents, and; availability of reliable resources to support the study. Finally, based on the findings of this study, the researcher made recommendation for future areas of study. The research conducted indicates the importance of the influence of the variables identified in this study on the overall experience of teaching TEFL in China. Through this study it is hoped that the experience of TEFL teaching in China can be brought to light, and enable the experience to be bettered for aspiring TEFL teachers, as well as for the institutions who employ them, as the phenomenon has an influence, not only on these two parties, but on host nationals of the country. , Thesis (MCom) -- Faculty of Business and Economic Sciences, Marketing, 2021
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Date Issued: 2021-04

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Parents’ perceptions of the impact of social media use on adolescent identity formation and safety

- Rochér, Stefné Elana

Authors: Rochér, Stefné Elana
Date: 2021-04
Subjects: Identity (Psychology) in adolescence , Parent and teenager -- Safety measures , Online social networks -- Safety measures
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10948/51883 , vital:43381
Description: Traditionally, parents were able to protect, monitor, guide, and support adolescents within the microsystem. However, in a society where the technosystemic digital world has entered microsystemic parent-adolescent interactions and the developmental process of adolescents’ identity formation, it is crucial to understand how parents experience and perceive the role that social media plays in their adolescent children’s identity development and safety. The primary aim of this study is to understand parents’ perceptions and experiences of social media use in adolescent identity formation and safety. The researcher utilised a qualitative research approach with an exploratory descriptive design. A non-probability purposive sample was employed, and telephonic semi-structured interviews were conducted with 15 participants. All of the participants were parents of adolescents between the ages of 12 and 18. Interviews were conducted until data saturation was reached. The participants’ responses were analysed using thematic analysis. Four categories arose from the data analysis and demonstrate that social media was perceived to have both a helpful and unhelpful impact on adolescents’ identity formation and safety. The first category refers to the perceived role social media plays in adolescents’ development of physical, gender, sexual, and social identity. The permanence of social media, the role parent-adolescent relationships play in adolescents’ online identity experiences, and identity commitment and exploration maturity emerged as key themes. The second category of key findings associated with social media and adolescents’ safety include social media violations, the mental health of adolescents, emotional regulation, identity formation, and reality illusion as themes that emerged from the data. The third category encompasses the resources that parents perceive to be of assistance in maintaining and enhancing safe social media use among adolescents, namely parent-adolescent relationships, remaining educated, and adjusting monitoring in a developmentally appropriate manner. The fourth category refers to a network of resources that parents apply to maintain and increase safe social media use by their adolescent children. Limitations of the study, recommendations for future research studies, and recommendations to support parents are discussed and described. , Thesis (MA) -- Faculty of Health Sciences, 2021
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Date Issued: 2021-04

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Participatory mapping of cultural ecosystem services in the Mountain Zebra National Park, South Africa

- Mpapane, Nelsiwe Pertunia

Authors: Mpapane, Nelsiwe Pertunia
Date: 2021-04
Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , Nature--Effect of human beings on--South Africa
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10948/52103 , vital:43432
Description: Cultural ecosystem services (CES) are an essential part of human well-being. CES characterize the intangible connections that people have with their surrounding environments, and act as vessels to facilitate the understanding of meaningful and respectful relationships between humans and nature, which are necessary for sustainability. However, CES render themselves as complex cultural dimensions that are difficult to connect to specific aspects of an ecosystem, or to measure and manage. Thus, a progressive approach is required for promoting effective management of CES within landscapes. This thesis endeavours to understand human─nature interactions in protected areas, the CES benefits that arise from such interactions, and the links of these to ecosystems, facilities or features within the landscape. Protected areas represent some of the last remaining intact ecological areas that support biodiversity conservation and human─nature experiences. Protected areas, such as the Mountain Zebra National Park, are therefore suitable study sites to cast light on: (a) how human─nature relationships manifest in parks, (b) which CES are experienced by visitors, (c) which landscape features are associated with CES benefits, (d) who visits the Park, and (e) how the delivery and/or accessibility of CES to visitors of the Park could be improved. My research involved qualitative and spatial elements as forms of enquiry over a period of six months of data collection. I used semi-structured interviews (n = 20) paired with a participatory mapping approach. Additionally, I performed a comparative analysis using a peer-reviewed paper that focused on the management perspectives of CES delivery, to seek out similarities and differences between management perspectives and actual visitor experiences. The findings of this study have outlined that the Mountain Zebra National Park offers significant benefits to visitors. Aesthetic, recreational, inspirational value and cultural heritage emerged as the most frequently mapped CES. The findings have also shown that CES benefits are widely distributed across the landscape, with a spatial correlation in hotspot areas. Moreover, amenities or built infrastructure such as picnic iii sites, camping areas and viewpoints within the Park, are crucial for strengthening social relationships among family and friends, as well as in aiding the delivery of CES. This study provides insights into the subjective and diverse ways that human─nature relationships translate into CES benefits. It also sheds light on the importance of adequate planning within protected areas, for the maximization of the benefits from CES to people without compromising the mandate of biodiversity conservation. This study also contributes to a growing body of evidence that documents human─nature interactions in, and non-material benefits acquired from, protected areas within South Africa. I further advocate for improved access, adequate infrastructure, awareness creation and strategies to attract the younger generation to the national parks of South Africa. , Thesis (MSc) -- Faculty of Science, School of Natural Resource Management, 2021
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Date Issued: 2021-04

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Perceived impact of cyberbullying on young adults’ psychological well-being

- Whitehorn, Hayley

Authors: Whitehorn, Hayley
Date: 2021-04
Subjects: Cyberbullying -- South Africa -- Psychological aspects , Youth -- Crimes against -- Psychological aspects
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10948/52374 , vital:43620
Description: Cyberbullying is a significant field of study within cyberpsychology and requires continued research and development in order to further literature and understanding in a South African context. An increase in cyberbullying results in an increased prevalence of the occurrence of psychological distress in the form of short-term consequences as well as long-term chronic impacts such as depression, anxiety, and decreased life satisfaction. This qualitative study aimed to explore and describe the experiences of young adults who have experienced cyberbullying and the perceived impact of this experience on their psychological well-being. Qualitative research is a flexible exploratory and descriptive approach to understanding the lived experiences of an individual and their subjective view of a specific phenomenon through an interpretivist paradigm. This study utilised purposive and snowball sampling of Nelson Mandela University students aged 18 – 25 years old to gain a total of 6 participants for data gathering through semi-structured interviews. This research process followed a retrospective perspective which focuses on the specific meaning-making and understandings which that individual places on that experience, in relation to their psychological well-being. Thematic analysis was employed to analyse the data and trustworthiness criteria and was utilised throughout to ensure the credibility of the study. It was found that cyberbullying, through multiple forms and methods, has various short-term and long-term perceived impacts in several spheres. The perceived psychological impacts occurred in the short-term and were internalised to extend to long-term impacts on psychological well-being, of which the majority were negative. There are influencing factors to the development, coping and management of perceived long-term impacts which reflect the outcomes on well-being. The findings of this study highlight the perceived impact of cyberbullying on young adults’ psychological well-being which is vital for future recommendations and intervention. , Thesis (MA) -- Faculty of Health Sciences, 2021
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Date Issued: 2021-04

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Perceived success of skills-development readiness within 4IR in RSA

- Hunt, Norman William

Authors: Hunt, Norman William
Date: 2021-04
Subjects: Technological innovations -- Economic aspects , Labor demand -- Research -- South Africa , Labor supply -- Research -- South Africa
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10948/51567 , vital:43310
Description: The purpose of this study was to develop four scenarios for South Africa over the next forty years. The Positive Seed scenario portrays a positive image of hope and determination, with positive institutional innovations, as well as positive innovative learning methodologies. While the Shankar scenario also portrays positive institutional innovations, it is lacking in terms of innovation learning methodologies. The Negative Seed is lacking in both innovation learning methodologies, as well as institutional innovations. Finally, the fourth scenario, that of the ‘What If’ scenario, portrays a scenario whether good innovative learning methodologies exist, or not, but lacks institutional innovativeness. The goal of this thesis was not only to affirm the known and knowable about the skills-development environment, but it is also aimed at exploring its future within the 4IR towards 2060. This was achieved by scenario planning and the Causal Layered Analyses (CLA) methodology, which is designed to help navigate through this creative process. This thesis starts off by identifying the forces of change, which it then combines in various ways to create the set of scenarios about how the future of the skills-development sector could evolve towards 2060. This thesis provides useful insight into drivers for change for the South African skills-development sector and how to anticipate skills-readiness in South Africa within the 4IR towards 2060 in accordance with the CLA and scenario planning methods. This thesis looks at the future of skills-development in South Africa over the next forty years from a decision makers point of view. , Thesis (DBA) -- Faculty of Business and Economic Sciences, Business Administration, 2021
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Date Issued: 2021-04

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Perceptions of blended learning by academic staff in the Health Sciences Faculty at Nelson Mandela University

- Barry, Janet

Authors: Barry, Janet
Date: 2021-04
Subjects: Blended learning -- South Africa -- Nelson Mandela Bay Municipality -- Faculty , Medical sciences -- South Africa -- Nelson Mandela Bay Municipality -- Faculty
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10948/50999 , vital:43199
Description: Numerous studies have investigated the use of blended learning by academic staff at tertiary institutions. The purpose of this study was to examine the perceptions of blended learning by academic staff at the Faculty of Health Sciences at Nelson Mandela University. A related objective was to identify barriers and facilitators to the adoption of blended learning by academic staff. A sequential, exploratory mixed-methods design was adopted for this study whereby Phase 1 (focus groups) was used to inform Phase 2 (questionnaire) of the study. Results were analysed from both phases and organised according to strategies, support, and structure of a blended learning adoption framework. Existing support structures to assist with blended learning adoption, understanding of what blended learning is, confidence in using blended learning tools, and time to attend training were some of the findings of the study. The researcher concluded that academic staff in the Health Sciences Faculty at Nelson Mandela University are positioned in the second stage of the blended learning adoption framework, namely the early adoption stage of blended learning. These findings imply that existing strategies and support within the Faculty and the University need to be further developed, and structures put into place to move to an advanced stage of adoption of blended learning by academic staff in Health Sciences Faculty of Nelson Mandela University. , Thesis (MPharm) -- Faculty of Health Sciences, Pharmacy, 2021
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Date Issued: 2021-04

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