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Ukuphononongwa kokushiywa nokubuyelwa ziinkumbulo kwababhali abachongiweyo kwiincwadi zeothobhayografi KaMtuze nomagona
Get PDFOlu phando lugxile ekuphononongeni ukukhumbula nokulibala kwii-othobhayografi ezibhaliweyo ekaMagona (1995) noMtuze (1976). Ii-othobhayografi eziza kusetyenziswa luphando zithi: Indlel’ Ebhek’ Enkundleni ngokukaPeter Mtuze (1976) nethi, Kubantwana Babantwana Bam ngokukaSindiwe Magona (1995). Xa kusenziwa uphando kuza kuhlalutywa amanqanaba okukhumbula nokulibala ukusukela ebuntwaneni ukuya kutsho ebudaleni kubabhali bee-othobhayografi. Uhlalutyo luza kube lugxininise ekujongeni iinkumbulo zababhali, luhamba nabo ngokwamanqanaba okukhula kwabo, amanqanaba okukhumbula nokulibala njengoko bekhula. Uphando luza kungqiyama ngengcingane yokukhumbula nokulibala eyasungulwa nguEbbinghaus (1885) kuphando lwakhe awayelwenza. Iinjongo zikaEbbinghaus ongumsunguli wengcingane zokuzisa ulwazi ngengcingane yokukhumbula nokulibala kukubonisa indlela ukulibala okwenzeka ngayo. UEbbinghaus uye wasebenzisa ikhevu yokulibala ukuvelisa banzi ingcingane. Lo msunguli wale ngcingane yokukhumbula nokulibala uthi, le khevu yokulibala ibonisa ukwehla kwezinga lokukhumbula okanye iqondo lokukhumbula xa luthe ulwazi lwalahleka ngenxa yokungenziwa kwamatiletile okulugcina nokukhunjulwa ngumninilo. Oku uEbbinghaus (1885) ukucacisa kwincwadi yakhe ethi Memory (1850-1909). Uphando njengokuba lubandakanya okwenzeka kwingqondo luza kube lukhatshwa yingcingane yokuqonda. Ingcingane yokuqonda yingcingane enkulu nengcingane ethe yajongwa kakhulu ziingcali ezininzi, ikwaphuhliswa ziingcaphephe ezininzi nezifundiswa. Uphando lukhethe ukuvelisa uEbbinghaus ukubonisa ingcingane yokukhumbula nokulibala, kodwa yona iphefumlelwe ziingcaphephe ezininzi mandulo. NgokukaGuyer (1998:1) enye yeengcaphephe abhale ngayo ethetha ngengcingane yokukhumbula nokuqonda nguKant (1724-1804) owaziwa ngomsebenzi wakhe othi: The Critique of Pure Reason. Lo msebenzi ucatshulwe apha kulapho uKant (1724-1804) athetha ngendlela yokuqonda ulwazi nokuzisa izizathu. Emva koko iingcali ezininzi ziye zaqhuba nengcingane yokuqonda ukuza kuthi ga kule mihla. Oku kuquka ingcali uChart (2017) obhale ngengcinane yokuqonda ngokwale mihla. Uphando luza kuvelisa ingcingane yesini njengengcingane ekhaphayo. Ingcingane yesini iza kusetyenziselwa ukuthelekiswa kwababhali bee-othobhayografi kujongwa indlela yokukhumbula nokulibala kugudlwe isini. Ngonyaka we-1955 uMoney (1955) waye wapapasha iphepha kunye nabo asebenza nabo kwiSebe lezeNgqondo uJoan G. Hampson nomyeni wakhe uJohn L. Hampson apho babeqala ukwazisa ngenkquleqhu yendima yesini besithi: Zonke izinto azithethayo okanye azenzayo umntu ukuze azichaze njengenkwenkwe okanye indoda, intombazana okanye ibhinqa, ngokulandelelanayo, zibizwa ngokuba ziindima zesini. Kulapho uMoney (1955) wathi wasungula khona le ngcingane yesini eza kuthi ithathe inxaxheba kolu phando ngokubonisa ukukhumbula nokulibala kwisini. Olu phando luza kuthi lwenziwe ngohlobo olubizwa ngokuba yintyilazwi. Intyilazwi ilunge kakhulu kolu hlobo lophando kuba luphando olufundisayo njengokuba luvelisa unobangela wokukhumbula nezizathu zokulibala. Intyilazwi iyagqitha ize ijonge amava ababhali, indlela abazicacise ngayo iinkumbulo zabo nendlela abazibhale ngayo iiothobhayografi zabo bechaza iziganeko zokukhula kwabo. Olu hlobo luza kube lungajongi zigrafu okanye manani kodwa lujonga kakhulu indlela yokuhlalutya oko kubhaliweyo. Iincwadi ezisetyenziswa kuphando ziza kushwankathelwa zibuye zihlalutywe ngokwendlela yokuhlola iziganeko zokukhumbula nokulibala kwababhali.Thesis (MA) -- Faculty of Humanities, School of Langauge, Media and Communication, 202
Instagram and male body image: an in-depth study of perceptions surrounding Instagram-related body ideals amongst gym-going, male students at Rhodes University.
Get PDFGuided by the disciplinary power and social comparison theories, this study sought to explore the perceptions of Instagram-related male body ideals amongst young, gym-going men enrolled at Rhodes University. Seven in-depth interviews were conducted, and the responses suggested that Instagram use shaped young men’s body-related perceptions in a variety of complex ways. The findings suggested that Instagram exposed users to a lean and muscular body ideal and that perceptions of this ideal were shaped by factors such as Instagram’s positivity bias, the age of users, and the exposure to the idealised bodies of fitness influencers. Furthermore, perceptions of Instagram’s male body ideal were influenced by context. Black South Africans that attended majority white high schools were more likely to conform to the male body ideals associated with their school environment. In such instances, individuals rejected the body norms associated with their ethnic backgrounds in lieu of striving for a lean and muscular body. Additionally, perceptions of body dissatisfaction were evident in cases where upward social comparisons were made with unrealistic male body ideals. Conformity to Instagram’s male body ideal also suggested that male users were subjected to a coercive form of power that resulted in their active participation in the reproduction of male body ideals.Thesis (MSocSci) -- Faculty of Humanities, Sociology, 202
A model for measuring and predicting stress for software developers using vital signs and activities
Get PDFOccupational stress is a well-recognised issue that affects individuals in various professions and industries. Reducing occupational stress has multiple benefits, such as improving employee's health and performance. This study proposes a model to measure and predict occupational stress using data collected in a real IT office environment. Different data sources, such as questionnaires, application software (RescueTime) and Fitbit smartwatches were used for collecting heart rate (HR), facial emotions, computer interactions, and application usage. The results of the Demand Control Support and Effort and Reward questionnaires indicated that the participants experienced high social support and an average level of workload. Participants also reported their daily perceived stress and workload level using a 5- point score. The perceived stress of the participants was overall neutral. There was no correlation found between HR, interactions, fear, and meetings. K-means and Bernoulli algorithms were applied to the dataset and two well-separated clusters were formed. The centroids indicated that higher heart rates were grouped either with meetings or had a higher difference in the center point values for interactions. Silhouette scores and 5-fold-validation were used to measure the accuracy of the clusters. However, these clusters were unable to predict the daily reported stress levels. Calculations were done on the computer usage data to measure interaction speeds and time spent working, in meetings, or away from the computer. These calculations were used as input into a decision tree with the reported daily stress levels. The results of the tree helped to identify which patterns lead to stressful days. The results indicated that days with high time pressure led to more reported stress. A new, more general tree was developed, which was able to predict 82 per cent of the daily stress reported. The main discovery of the research was that stress does not have a straightforward connection with computer interactions, facial emotions, or meetings. High interactions sometimes lead to stress and other times do not. So, predicting stress involves finding patterns and how data from different data sources interact with each other. Future work will revolve around validating the model in more office environments around South Africa.Thesis (MSc) -- Faculty of Science, School of Computer Science, Mathematics, Physics and Statistics, 202
Lion and leopard diet and dispersal in human-dominated landscapes
Get PDFTerrestrial carnivore population declines are driven by habitat loss and fragmentation, prey-depletion, persecution, and retaliatory killings. Population strongholds now centre on protected areas, that face increasing human pressure, resulting in population isolation, declining prey populations, and livestock intrusion. I therefore aimed to investigate dispersal and connectivity, and diets of lions (Panthera leo) and leopards (P. pardus) in response to human-use and wildlife density gradients in the Greater Limpopo Transfrontier Conservation Area (GLTCA). Firstly, I investigated dispersal and connectivity for these carnivores across the GLTCA, using single nucleotide polymorphisms. I present evidence that in the prey-depleted Mozambique portion of the GLTCA, lion and leopard dispersal distances are higher compared with the prey-abundant Kruger National Park (KNP). I also provide the first evidence for long-range dispersal in female lions. Despite evidence for connectivity occurring across the GLTCA, I recorded population structuring across the region for both carnivores, likely due to habitat fragmentation by human activities in the Mozambique portion of the GLTCA. I then assessed carnivore diet responses to prey depletion and livestock availability by comparing lion and leopard diets in the prey-abundant/livestock-absent KNP (South Africa), with the prey-depleted/livestock-abundant Limpopo National Park (LNP, Mozambique), using scat analyses. Lions and leopards downshifted their prey size selection in LNP relative to KNP. Despite both carnivores expanding their dietary niche breadths in LNP relative to KNP, diet overlap did not differ between sites. This suggests that even when prey is depleted, lions and leopards can partition food resources, which likely limits competition. Despite cattle (Bos taurus) being the most abundant ungulate in LNP, lions and leopards strongly avoided cattle, supporting the notion that carnivores can perceive the risk of hunting livestock and modulate their foraging behaviour to reduce human-carnivore conflict. Should my findings reflect general patterns in carnivore dispersal and diet responses to human-use and wildlife gradients, then carnivore conservation initiates across their range should focus on prey population rehabilitation, improved livestock husbandry practices, the establishment of effective dispersal corridors and improved human-tolerance towards large carnivores.Thesis (MSc) -- Faculty of Science, School of Environmental Sciences, 202
The Algoa Bay region groundwater cycle – linking source to coast
Get PDFGroundwater is a crucial component of freshwater supply globally, especially in water-scarce regions such as semi-arid climatic areas where surface water resources are climatically limited and further constrained during droughts. Groundwater resources are also important from an ecological perspective as they support numerous surface ecosystems including wetlands and rivers. Coastal groundwater discharge along the South African coast sustains supratidal spring-fed living microbialite ecosystems (SSLiME). These systems act as potential analogues for Earth’s earliest ecosystems and are therefore useful from a palaeoscientific and evolutionary perspective. The Southern Cape coast of South Africa is characterised by both fractured and intergranular aquifers and hosts the most extensive network of SSLiME reported globally. However, the region is frequently affected by water scarcity crises and consequently groundwater development and usage has increased. Yet, it is unclear to what extent coastal discharge is linked to inland aquifers and whether anthropogenic activities influence the quantity and quality of groundwater that flows into SSLiME. This thesis aims to assess the groundwater cycle of the Algoa Bay region along the Southern Cape coast by means of a multi-tracer study. Specifically, it endeavours to develop a better understanding of the hydrogeochemical connectivity between inland groundwater resources and coastal microbialite ecosystems. To achieve this, four groups of hydrochemical tracers were used: H- and O-isotope ratios, major cations and anions, organic micropollutants and macronutrients. Sampling strategies included monthly precipitation collection over twelve months (stable water isotopes), once-off groundwater collection from boreholes, inland springs and coastal discharge (all tracers). In addition, coastal groundwater discharge was sampled during a once-off repeat campaign (all tracers) and seasonally at selected sites (macronutrients). A local meteoric water line (LMWL) for the region was established and compared to the isotopic signature of groundwater. The results indicate that groundwater is likely recharged directly and with little evaporation. Furthermore, similarities in isotopic signatures between inland and coastal aquifer systems suggest some level of hydrogeological connectivity or similar environmental drivers of recharge, such as precipitation amount and moisture source. This is also supported by the physico-chemistry and major ionic composition of the groundwater samples. However, the major ion composition of groundwater is variable and, although it predominantly reflects the sodium-chloride nature of precipitation, lithological and spatial trends are apparent. For example, coastward trends such as increasing conductivity, calcium, total alkalinity, and nitrogen is evident. While isotopes and major ions inform on the environmental drivers and geogenic influence on groundwater recharge, the organic micropollutants and macronutrients provide insight into the nature of anthropogenic impacts on groundwater quality. Micropollutants quantified in the groundwater samples included artificial sweeteners, pharmaceuticals, a biocide, and an illicit drug. These compounds are mostly classed as wastewater indicators and indicate aquifer contamination from leaking reticulation systems and septic tanks. The highest concentrations are associated with the urban and coastal peri-urban areas, while groundwater from rural areas is often devoid of any micropollutants except sulfamic acid, which may be introduced during recharge from precipitation. Furthermore, the presence of selected compounds in groundwater discharge signifies that at least a component of the groundwater is derived from recent infiltration. Similarly, the macronutrient content of groundwater reflects the proximal land use. As such, coastal groundwater discharge sites adjacent to coastal villages reflect higher concentrations compared to rural sites. In addition, the nutrient load supplied to and discharged from SSLiME systems is quantified and the nutrient attenuation is estimated. This thesis contributes recent hydrogeochemical information for a structurally complex semi-arid area under both natural (drought conditions) and human (increased water use, degradation of aquifers) pressures. Collectively, the results indicate that coastal groundwater discharge is likely a mixture of both the intergranular and fractured aquifers and that anthropogenic activities in the hinterland is contaminating the groundwater. This study is an important addition to the baseline hydrological information available for the region and may be useful in terms of sustainable groundwater management strategies and development toward a socio-ecological optimum, especially as related to coastal microbialite system.Thesis (PhD) -- Faculty of Science, School of Environmental Sciences, 202
Investigating playing-related musculoskeletal disorders in South African instrumental musicians
Get PDFThis study, one of the first studies in SA to investigate PRMD in a wideranging sample of instrumental musicians using a validated self-report tool, shows that PRMDs are highly prevalent among a range of SA musicians and have a considerably negative effect on musicians’ performance ability and quality of life. However, making inferences about most affected genre or instrumental group was challenging due to the small sample sizes in some categories. The results from this study confirm that the nature of PRMD development is indeed multi-factorial, with factors numerous individual and playing-related factors playing a role in the development of PRMDs in SA musicians. Better support and education on health promotion for musicians, including awareness of and prevention strategies for PRMDs in the SA context are needed which may reduce the prevalence of PRMDs.Thesis (MSc) -- Faculty of Science, Human Kinetics and Ergonomics, 202
Factors affecting learning of English as a second language in South African schools
Get PDFThe aim of this study was to identify the factors that are affecting the learning of English as a second language in South African schools. Although many South African learners are not fluent or native speakers of the English language, they are required to learn the content of their subjects in English. This is because there is a lack of resources in South Africa to teach other languages and English is seen as the language that grants access to better education and job opportunities, and it is the language that is used to communicate worldwide. The input, output, interaction and sociocultural theories were used to inform the theoretical framework of the study. This study used both qualitative and quantitative methods in order to answer the research question. The participants for this study consisted of individuals who matriculated in South Africa within the period of the past five years and were taught English as a second language. The participants were approached through social media platforms. One hundred participants responded to the questionnaire and 14 were interviewed. The methods of conducting interviews and distributing questionnaires were used to help the researcher to gain a better understanding of the topic. The findings of this study indicate that there are still teachers in South African schools who are not well qualified or proficient in the English language. In addition, learners face a variety of challenges in learning English as a second language. These challenges are found not only within the school context but also outside of school. The learners’ external environment also influences their learning of English as a second language. These external influences include overcrowding at schools, lack of resources such as libraries or books, and parents who are not involved in their children’s learning of English. Being proficient in L1 is important in order develop L2 because a learner can use their L1 skills to learn L2. There are also affective factors such as motivation, confidence and anxiety that play a role in in learning a second language. One of the reasons that some learners perform better than others when it comes to learning English is because of the motivation and self-confidence that they possess. Anxiety related to learning English as a second language is seen as a threat to an individual’s self-concept. This is because learners might find it difficult to communicate well in a language they have not learnt completely. Learners need to be encouraged to achieve their best level in their English skills so that their learning outcomes can be improved. Also, in order for the literacy rate of poor performing schools in South Africa to be improved, teachers should be trained to teach the English language better, parents need to be involved actively in their children’s learning of English as a second language and the Department of Basic Education needs to develop programmes and a policy that puts emphasis on the use of English as a LoLT.Thesis (MA) -- Faculty of Humanities, School of Language, Media and Communication, 202
Performance evaluation of baseline-dependent window functions with several weighing functions
Get PDFRadio interferometric data volume is exponentially increasing with the potential to cause slow processing and data storage issues for radio observations recorded at high time and frequency resolutions. This necessitates that a sort of data compression is imposed. The conventional method to compress the data is averaging across time and frequency. However, this results in amplitude loss and source distortion at the edges of the field of view. To reduce amplitude loss and source distortion, baseline-dependent window functions (BDWFs) are proposed in theliterature. BDWFs are visibility data compression methods using window functions to retainthe signals within a field of interest (FoI) and to suppress signals outside this FoI. However,BDWFs are used with window functions as discussed in the signal processing field without any optimisation. This thesis evaluates the performance of BDWFs and then proposes to use machine learning with gradient descent to optimize the window functions employed in BDWFs. Results show that the convergence of the objective function is limited due to the band-limited nature of the window functions in the Fourier space. BDWFs performance is also investigated and discussed using several weighting schemes. Results show that there exists an optimal parameter tuning (not necessarily unique) that suggests an optimal combination of BDWFs and density sampling. With this, ∼ 4 % smearing is observed within the FoI, and ∼ 80 % source suppression is achieved outside the FoI using the MeerKAT telescope at 1.4 GHz, sampled at 1 s and 184.3 kHz then averaged with BDWFs to achieve a compression factor of 4 in time and 3 in frequency.Thesis (MA) -- Faculty of Science, Mathematics, 202
The impacts of bottom-up and top-down drivers in shaping the herbivore community in Pafuri, Kruger National Park, South Africa
Get PDFGlobally, terrestrial mammal populations are facing critical population declines and range contractions owing to habitat fragmentation and destruction, wildlife overexploitation, and climate change driven by expansion of the human population. Mammalian herbivores are integral for maintaining ecosystem structure and functionality. They do this this through herbivory, by acting as prey and cycling soil nutrients. The impacts of herbivores on ecosystems, however, vary with their spatial occupancy which is influenced by interacting bottom-up and top-down factors. Modelling the drivers of herbivore communities is no trivial task given the myriad of potential bottom-up and top-down factors, and the interactions between the two, as well as the species-specific variations in intrinsic functional traits (e.g., foraging strategy, body size, metabolic rate, etc.) influencing herbivore responses (e.g., social structure, space-use, activity patterns, etc.) to these drivers. Consequently, few studies have attempted to model both bottom-up and top-down drivers in structuring herbivore communities, particularly in an African context where predator-prey guilds include multiple species, exposed to high levels of human activity. Therefore, the overarching aim of my research was to quantify the relative effects of both bottom-up and top-down factors driving the herbivore community in the northern Pafuri region of Kruger National Park, South Africa. I utilized a combination of field (i.e., camera trap and vegetation surveys) and analytical (i.e., stable carbon isotopes from faeces and plants) techniques in conjunction with geospatial data to evaluate the impacts of bottom-up (i.e., forage quantity, quality, and water availability) and top-down (i.e., predation and anthropogenic risks) factors on herbivore spatial occupancy and activity patterns. Herbivore responses to bottom-up and top-down factors were species-specific, even among members of the same feeding guild. Specifically, I found that herbivores (varying in body size and foraging strategy) displayed temporal, spatial and in some instances, dietary shifts that reflect species-specific, ecological trade-offs between resource acquisition, and predator and human avoidance. For example, kudu (Tragelaphus strepsiceros) displayed temporal and spatial avoidance of predators and humans, and exhibited previously undocumented levels of seasonal dietary shifts which suggests that the species traded forage acquisition for reduced predation and anthropogenic risks. Further, high levels of human activity appeared to eclipse the risks associated with natural predators resulting in human induced landscapes of fear. For example, warthogs (Phacochoerus africanus) and zebra (Equus quagga) occupied habitats with higher predation risks, but displayed spatial avoidance of nature reserve boundaries which were synonymous with high levels of bushmeat poaching. Most studies focussing on the impacts of bottom-up and top-down drivers neglect to consider the roles that humans play in structuring ecological communities. The results of my thesis, however, emphasize the importance of including anthropogenic drivers when investigating the roles that various bottom-up and top-down factors play in shaping ecological communities.Thesis (PhD) -- Faculty of Science, Zoology and Entomology, 202
It's all in your head
Get PDFMy thesis is a collection of short stories that delve into the multifaceted nature of death, with a specific emphasis on murder, violence, death and their profound aftermath, including themes of loss, grief, and trauma. These stories offer diverse perspectives, narrated by perpetrators, voiceless victims, and those left to pick up the shattered pieces. Additionally, some stories are seen through the eyes of those tasked with handling the bodies. Often set in unnamed locations, they delve into imaginary and fantastical worlds, while remaining grounded in recognisable situations and spaces. I draw inspiration from popular and genre fiction such as horror, crime fiction and true crime stories, but approach my writing from a psychological lens, employing stylistic experimentation to challenge readers' expectations. The power of silence is a recurring motif. Rather than focusing on unearthing facts or revealing the "truth" like crime fiction often does, my narratives delve into what isn't or at times cannot be told — the unsayable. Some of my stories explore silence inherent in violence, grief, and the inability to articulate one's experience in the face of a violent act or a life prematurely ended. Others delve into the silence of untold stories and the dark secrets of the perpetrators. By exploring these contrasting perspectives, I aim to offer a nuanced exploration of death and its aftermath. The writing styles of Stephen Graham Jones, Lydia Davis, and Kuzhali Manickavel influence my work. Lydia Davis, known for her mastery of very short, flash fiction, ranging from single sentences to a paragraph or two, inspires me with her precise observations of the human condition. Her minimalist prose, carefully selecting and arranging words and sentences, encapsulates the power of less-is-more storytelling. Manickavel creates surreal yet tangible worlds, combining idiosyncratic, intense and eerie elements with unfiltered expression. Drawing from her ability to blur the lines between the surreal and the real, I infuse my stories with a sense of disquieting authenticity. Stephen Graham Jones stands out for his ability to explore morbid themes in a compelling and unconventional manner. His experimentation with horror fiction tropes, the visceral realism of his prose, and his complex characters inspire me to capture the unsettling feeling that something dreadful has occurred without explicitly detailing the facts and intricacies.Thesis (MA) -- Faculty of Humanities, School of Languages and Literatures, 202