A case study of code-switching in English First Additional Language Foundation Phase classrooms
- Authors: Goliath, Eldrige Justine
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/436453 , vital:73273
- Description: Access restricted. Expected release in 2026. , Thesis (MEd) -- Faculty of Education, Secondary and Post School Education, 2024
- Full Text:
- Date Issued: 2024-04-05
An analysis of mathematical connections in the presentations of fraction concepts in Namibian grade 7 mathematics textbooks
- Authors: Sibeso, Pumulo Priscah
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/436488 , vital:73276
- Description: This study investigated how selected grade 11 mathematics learners used smartphones with the MathCityMap application to learn trigonometry outdoors for conceptual understanding. The aim of this research project was to explore outdoor mathematics learning for conceptual understanding using smartphones. This case study of grade 11 mathematics learners in Lejweleputswa District in the Free State Province, was informed by the Realistic Mathematics Education theory. The study is grounded within an interpretive paradigm and used the explanatory sequential mixed-method design. Forty-two grade 11 mathematics learners participated in the survey and from these 12 were purposively selected to participate in walking the mathematics trails and interviews. The findings revealed that, while the grade 11 mathematics learners acknowledged the significance and value of using smartphones for learning mathematics, they were prohibited from carrying or using smartphones on the school premises, as part of the school code of conduct. The preferred use of smartphones for learning mathematics was understandable, as the survey was conducted at a time when the COVID-19 pandemic and associated restrictions were still in place. The survey unearthed that among applications for learning mathematics, the MathCityMap application was not known by the learners who participated in the survey. Mathematics trails observations indicated that outdoor tasks were a source of mathematical concepts or formal mathematical knowledge, and enabled learners to reinvent mathematical ideas and concepts with adult guidance. Learners were able to make use of appropriate mathematical models and connections. The mathematics trails ignited robust discussions among learners, and prompted learners to draw from prior knowledge, and recognise and identify suitable mathematical models and shapes from the real-world objects. Learners were able to use multiple representations, make necessary mathematical links, and use their prior knowledge to enhance their trigonometry conceptual understanding. This study concluded that using smartphones with the MathCityMap application could enhance conceptual understanding of trigonometry. The implications for teachers are that learners should be exposed to outdoor mathematics learning using smartphones with the MathCityMap application to improve their conceptual understanding. It is hoped that the results of this study can be used by various stakeholders, who include, inter alia, mathematics subject advisors and teacher training institutions, to enhance learners’ conceptual understanding of mathematics. , Thesis (MEd) -- Faculty of Education, Secondary and Post School Education, 2024
- Full Text:
- Date Issued: 2024-04-05
Dancing with(in) possibilities: emerging public and convivial pedagogies for ecological citizenship
- Authors: Skerrit, Hayley Frances
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/436510 , vital:73278
- Description: This research project explores ways in which ecological citizenship can be stimulated through collaborative public pedagogy and transgressive learning (t-learning) processes. This research identifies ‘places’ of innovation to cover sections that would usually be described in terms of ‘problem statement’, ‘research focus’, ‘intended outcomes / main contribution’ and ‘theory and methodology’. The Place of Worry is identified through the triple C Crisis (Covid, Capitalism and Climate-Change) which reveal the disconnect to the diverse ecologies (both social and natural) that sustain us. The Place of Possibility demonstrates that through ecological citizenship we can begin to absent absences (De Sousa Santos, 2016) and transform into an embodied response to the triple C crisis. The Place of Emergence transforms these possibilities into practice by demonstrating the place between the worry and the possibility allows for an emergence of a new kind of solution, referred to as the third space within this thesis. The Place of Process delves into the t-learning stories that emerged through research creation and works with iterative feedback and cycles of creation. The unfolding of this t-learning project is guided by the use of metaphor and symbolism as a figuration of macro- and microscopic interactions within these learning fields/ecosystems. Symbolic figuration and speculative metaphor are valuable in this thesis and in my own collaborative meaning-making endeavour as they offer translation protocols for when language fails to embody, the rich embodied experience of this form of learning. The embodiment of this work will help to create restorative care practices through transgressive learning (Lotz-Sisitka et al., 2016) and research creation (Manning, 2016). The study has a particular focus on the emergence of identities and onto-epistemological orientation within the social learning journey towards ecological citizenship and the various ways in which they can be embodied to enable public pedagogy. , Thesis (MEd) -- Faculty of Education, Secondary and Post School Education, 2024
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- Date Issued: 2024-04-05
Exploring grade 11 learners’ mathematical problem-solving skills using Polka’s model during the learning of Euclidean geometry
- Authors: Hlupeni, Ratham
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/436465 , vital:73274
- Description: The skill of Problem-solving in Mathematics is very imperative. Poor performance by most South African learners in schools and international tests such as the Trends in International Mathematics and Science, calls for emphasis to be placed on problem-solving in the teaching and learning of Mathematics. Euclidean Geometry is perceived, especially by learners, to be one of the difficult components of Mathematics. Thus, the aim of this study was to explore and develop the mathematical problem-solving and geometric skills of Grade 11 learners in Euclidean Geometry. Polya’s model of problem-solving was employed in geometric skills development as a tool for intervention. The concepts Geometry and problem-solving formed the conceptual framework of the study, while the social cognitive theory constituted the theoretical framework. A case study was used as the main research method following a mixed method approach within an interpretivist paradigm. Purposive and convenience sampling methods were used in the selection of both the Mathematics class and the six learners whose work was further observed and analysed. Data about the geometric skills displayed by the learners was gathered using a moderated pre-intervention test; observations; document analysis; a moderated post-intervention test; and focus group interviews. Data was analysed quantitatively using descriptive statistics and qualitatively using thematic analysis. In the pre-intervention test, learners did not bring with them expected geometric skills to the classroom before they were introduced to grade11 Geometry content and when doing problem-solving during intervention, the four stages of model used were not necessarily following each other in a linear sequence with most of the learners not applying the fourth stage “look back”. In the post intervention test, the frequency of use and application of most geometric skills improved in comparison to the pre-intervention test; the frequency of correct and inappropriate application of the skills increased at the expense of incorrect application. Learners appreciated the four stages model and gave their views related to the challenged faced during the use of the four stages model and the challenges revealed include: practice related challenges, challenges specific to certain learners, concept related challenges, curriculum-related challenges, model application challenge, and context related challenges. The study concludes that the effective use of Polyas’ four stages model can yield great results in developing learners’ geometric and problem-solving skills. The study recommends that teachers give more attention to prior geometric knowledge, teaching of geometric theorems, teaching of geometric problem-solving, and the learning environment. , Thesis (MEd) -- Faculty of Education, Secondary and Post School Education, 2024
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- Date Issued: 2024-04-05
Exploring how language teachers’ employment of Reading to Learn (RtL) pedagogy enhances Grade 10 learners’ reading skills
- Authors: Gazide, Sydney
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/436442 , vital:73272
- Description: The study aimed to explore how language teachers’ employment of the Reading to Learn (RtL) pedagogy enhances Grade 10 learners’ reading skills. The RtL was designed to address challenges regarding learners’ literacy development which other methods could not successfully address. Unfortunately, poor reading skills in English First Additional (FAL) and home languages (HLs) continue to be a challenge among learners from schools situated within poor socio-economic communities in South Africa. The study employed the six-stage curriculum cycle advocated by RtL pedagogy as a scaffolding interaction cycle in the teaching practice reading development sequence to bridge the gap in acquiring reading skills. The main research question for the study was: How can the language teachers’ employment of the RtL pedagogy enhance the teaching of reading? The study was located within the critical education paradigm which encourages critical thinking, creativity, freedom to appreciate and critical awareness in students. This study generated data through focus group discussions, interviews, and document analysis. The research was a case study involving four teachers selected from a secondary school in an informal settlement with low socio-economic standards. A sample of four grade 10 classes with 45 learners in each class for English First Additional Language (FAL), Sesotho Home Language (HL) and Isizulu Home Language (HL) were used in the study. Purposive sampling allowed the researcher to choose participants who were willing to be part of the project. The Reading to Learn pedagogy developed by Rose was drawn from Vygotsky’s, Bernstein’s, and Halliday’s theories. The findings revealed that RtL was used for the professional development of teachers and a methodology that supported learners to improve their reading skills. Even though the study was conducted when South Africa was hit by the COVID-19 pandemic with concomitant learning losses, evidence shows that the Reading to Learn pedagogy improved the sampled Grade 10 learners’ reading skills. It was also highlighted that the department of education (DoE) should create conducive teaching and learning conditions through infrastructural development and provision of resources. , Thesis (MEd) -- Faculty of Education, Institute for the Study of Englishes in Africa, 2023
- Full Text:
- Date Issued: 2024-04-05
Exploring outdoor mathematics learning for conceptual understanding through smartphones
- Authors: Pop, Vuyani Samuel
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/436477 , vital:73275
- Description: This study investigated how selected grade 11 mathematics learners used smartphones with the MathCityMap application to learn trigonometry outdoors for conceptual understanding. The aim of this research project was to explore outdoor mathematics learning for conceptual understanding using smartphones. This case study of grade 11 mathematics learners in Lejweleputswa District in the Free State Province, was informed by the Realistic Mathematics Education theory. The study is grounded within an interpretive paradigm and used the explanatory sequential mixed-method design. Forty-two grade 11 mathematics learners participated in the survey and from these 12 were purposively selected to participate in walking the mathematics trails and interviews. The findings revealed that, while the grade 11 mathematics learners acknowledged the significance and value of using smartphones for learning mathematics, they were prohibited from carrying or using smartphones on the school premises, as part of the school code of conduct. The preferred use of smartphones for learning mathematics was understandable, as the survey was conducted at a time when the COVID-19 pandemic and associated restrictions were still in place. The survey unearthed that among applications for learning mathematics, the MathCityMap application was not known by the learners who participated in the survey. Mathematics trails observations indicated that outdoor tasks were a source of mathematical concepts or formal mathematical knowledge, and enabled learners to reinvent mathematical ideas and concepts with adult guidance. Learners were able to make use of appropriate mathematical models and connections. The mathematics trails ignited robust discussions among learners, and prompted learners to draw from prior knowledge, and recognise and identify suitable mathematical models and shapes from the real-world objects. Learners were able to use multiple representations, make necessary mathematical links, and use their prior knowledge to enhance their trigonometry conceptual understanding. This study concluded that using smartphones with the MathCityMap application could enhance conceptual understanding of trigonometry. The implications for teachers are that learners should be exposed to outdoor mathematics learning using smartphones with the MathCityMap application to improve their conceptual understanding. It is hoped that the results of this study can be used by various stakeholders, who include, inter alia, mathematics subject advisors and teacher training institutions, to enhance learners’ conceptual understanding of mathematics. , Thesis (MEd) -- Faculty of Education, Secondary and Post School Education, 2024
- Full Text:
- Date Issued: 2024-04-05
The impact of Malawi’s National Strategy on Inclusive Education: a case study analysis of two schools
- Authors: Kaunda, Bridget
- Date: 2024-04-05
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/436499 , vital:73277
- Description: Using a qualitative case study approach, this study analysed the impact of Malawi’s National Strategy on Inclusive Education (NSIE) on inclusive education (IE) in two inclusive schools. IE is a global education reform for accommodating learners with Special Educational Needs (SEN) in mainstream schools. Malawi developed the NSIE in 2017 to guide IE implementation while working on the actual policy. This study aimed to analyse how NSIE has impacted IE during its first five years of implementation. This was done by examining how the NIES goals were designed, enacted, and implemented, the perceptions of system users, who include teachers, learners, and parents towards IE, and the enabling and constraining factors on its implementation. Drawing on the theoretical perspectives of the democratic theory of education and systems theory, this study argues that NSIE has ameliorated IE implementation by putting in place a structural implementation system. However, the implementation is marred by several constraining factors both at the management and implementation (schools) levels. Secondly, there is a disjuncture between NSIE as intended and as implemented in the sampled schools. Thirdly, the IE system lacks effective communication and responsive decision-making, especially in the monitoring process and school involvement. Fourthly, the study shows that IE implementation depends on a functional and well-stocked resource centre (RC) and the availability of enough qualified staff. It was also observed that poor teacher motivation resulting from lack of incentives such as promotions and training were major obstacles to the successful implementation of IE at the school level. , Thesis (MEd) -- Faculty of Education, Primary and Early Childhood Education, 2024
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- Date Issued: 2024-04-05
A battle of values: analysing the changing attitudes towards African refugees in Europe
- Authors: Mannion, Megan Kate
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/435525 , vital:73165
- Description: Cosmopolitanism is a moral perspective that stresses the importance that every human being is an equal and ultimate unit of moral concern. These principles make cosmopolitanism more concerned for and accommodative towards outsiders to a political community. Against the abstraction and universalism of cosmopolitanism, communitarianism emphasizes the role communities play in shaping our individual identities and sees it as justified that the interests and well-being of community members receive priority over those of outsiders. Both these value systems are present in Europe. The question is about which direction the trend has moved in recent decades. This dissertation examines the changing values that inform attitudes toward African refugees in Europe to get at this issue. Have attitudes towards African refugees shifted in a cosmopolitan or a communitarian direction in recent decades? This dissertation examines newspaper articles from The Guardian between 1990 and 2022 to track changes in value. The analysis of these articles uncovered that communitarian values were the most prevalent and stayed the most prevalent from 1990 to 2022. These findings indicate that communitarian values are higher than cosmopolitan values regarding African refugees within the general European context. These findings add to the growing body of knowledge regarding attitude shifts, and they provide a timeline for value changes that can help predict future values and be used in future comparative studies. , Thesis (MA) -- Faculty of Humanities, Political and International Studies, 2024
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- Date Issued: 2024-04-04
A MIGHTEE Investigation of radio quiet AGN
- Authors: Namane, Neo
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/435367 , vital:73151
- Description: This study is aimed at being an overview and investigation of the behaviour and morphology of radio quiet (RQ) active galactic nuclei (AGN) in the radio and optical/near-infrared (NIR) bands. It is hoped that a concise description of the relation that exists between accretion activity and star formation (SF) will be achieved through utilization of multiwavelength astronomy analysis. This analysis includes the processing of data acquired from the MeerKAT International GHz Tiered Extragalactic Exploration survey (MIGHTEE), the Southern African Large Telescope (SALT), the Hyper Suprime Camera (HSC) mounted on the Subaru telescope and the VISTA telescope. In this thesis, several targets were observed using SALT spectroscopy, but a redshift of only one of them was obtained. Lastly, it was established that for the sample of RQ AGN studied, the AGN contribute a large fraction of the radio emission observed. , Thesis (MSc) -- Faculty of Science, Physics and Electronics, 2024
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- Date Issued: 2024-04-04
A systematic literature review of the current approaches to dream work: global and local trends
- Authors: Feris, Eric-John Ricardo
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/435440 , vital:73157
- Description: Dreaming is an inherent and universal aspect of human existence that offers a profound window into the realms of consciousness and cognition. It has captivated the human imagination for centuries, prompting various methods and theories to decipher its significance. Global research underscores the enduring importance of dreams in psychotherapy, expressed through diverse methodologies, techniques, and theoretical models. Curiously, within the South African context, a cultural landscape rich in traditional healing, there exists a noticeable lack of research concerning the utilisation of dreams in therapy. This systematic literature dove into 30 articles which remained after applying the systematic literature review strict inclusion and exclusion criteria of the literature searches. From these articles, the review delved into the multifaceted world of dream work, investigated prevailing approaches and themes both on a global scale and within the South African context, and addressed three key research questions: (1) What themes can be identified from a review of current approaches to dream work globally? (2) What themes can be identified from a review of current approaches to dream work locally? (3) What are the practical implications for working with dreams according to global and local themes? A thematic analysis of the literature identified three overarching themes: (1) Psychological approaches to dream work, (2) Psychiatric and medical approaches to dream work, and (3) Socio-cultural approaches to dreams. These findings highlight the necessity of recognising cultural nuances and, underscores the importance of developing a flexible, culturally sensitive framework for dream work, and advocates for the adaptation of global dream work methodologies into culturally specific approaches, fostering psychotherapeutic benefits tailored to the South African context. The research serves as a stepping stone to further investigation into the techniques and approaches of dream work in South Africa, ultimately contributing to the broader field of dream analysis. , Thesis (MA) -- Faculty of Humanities, Psychology, 2024
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- Date Issued: 2024-04-04
Acacia dealbata invasion and clearing in Upper Tsitsana communal areas of South Africa: human perceptions and ecological impacts
- Authors: Coka, Nwabisa
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/434876 , vital:73113
- Description: The number of invasive alien plants in South Africa and globally continue to increase mostly due to increased human movement and climate change. It is estimated that approximately 10 000 hectares of South Africa’s terrestrial land is invaded by invasive alien species. Recent studies have reported that invasion by invasive alien plants cost South Africa billions of Rands every year through loss of water and ecosystem services. Although much has been done to understanding invasion trends, patterns, and processes in South Africa, little is knowns regarding human benefits linked to alien plant invasion as well as human perceptions regarding management interventions, particularly clearing by the national Working for Water programme. This thesis took a socio-ecological approach to assess (i) local people perceptions and knowledge of Acacia dealbata invasion and clearing, and (ii) extent of grazing grass diversity and composition recovery following A. dealbata clearing. To answer the above-mentioned objectives, both qualitative (face-to-face interviews) and quantitative (vegetation surveys) methods were used in grasslands located in upper Tsitsana catchment, South Africa. Results from the 165 interviews conducted in six villages show that most villagers are aware of A. dealbata in the area, but do not know that it is an invasive alien plant. Respondents accrue several benefits from the plant that include firewood (98% across all villages), construction pools (34% across all villages), and shade (3% across all villages). Respondents identified several costs associated with A. dealbata invasion, such as roots damage to houses (37% across all villages), hindering growth of crops (15% across all villages), and takes up yard space (29% across all villages). Most of the villages ranked the effects of A. dealbata on grazing as highly severe. Villages indicated that the Working for Water clearing programme presents them with socio-economic benefits such as employment and money. Some villagers noted that the clearing of A. dealbata in the area restores grazing grass (62% across all villages) and water (32% across all villages). Based on these interview survey results, the study concludes that A. dealbata has both costs and benefits that support local people’s livelihoods; therefore, its management should consider views for local users. Grass surveys conducted in 1 m2 quadrats that were replicated 15 times across four paired A. dealbata cleared and grassland sites showed that the removal of A. dealbata facilitates the recovery of native grasses. Of the 14 different grazable grass species that were identified across all quadrats only one (Bulbostylis sp.) is not palatable to livestock. Although grass cover was significantly (p < 0.05) higher in the grasslands than the cleared patches, grass richness was significantly (p < 0.05) higher in the cleared patches an indication that recovery of different grasses is taking place. Based on these vegetation survey results; the study concludes that recovery of grazing grasses after A. dealbata clearing four years ago is following a positive trajectory as the cleared sites are looking like the grassland sites. Overall, the study recommends that management of A. dealbata in Tsitsana landscape requires a socio-ecological approach to understand user benefits whilst at the same time developing measure to control the plant. The study has provided evidence that A. dealbata clearing facilitates passive restoration of grazing grass and local villages are aware of these restoration benefits. , Thesis (MSc) -- Faculty of Science, Environmental Science, 2024
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- Date Issued: 2024-04-04
Application of the modified pitman and swat models for groundwater recharge estimation in the upstream area of the Uitenhage artesian basin, South Africa
- Authors: Wasswa, Peter
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/435400 , vital:73154
- Description: The world's most plentiful source of freshwater is thought to be groundwater. During extended dry times, it serves as an essential storage component and guards against environmental catastrophes. Despite its critical functions in the aforementioned scenarios, it is often insufficiently understood and inadequately managed. As a result, it calls for the adoption of integrated methods to comprehend the dynamics of groundwater recharge. Thus, the current study evaluated the applicability and suitability of the Modified Pitman and SWAT models for groundwater recharge estimation in the upstream area of UAB for the period that spanned from 1993 to 2021. It was achieved by using a qualitative conceptual-perceptual model to inform the two hydrological models, Modified Pitman, and SWAT. The developed qualitative conceptual-perceptual model depicted the dominancy of irregularly folded and fractured TMG rock outcrops coupled with fault systems in the upstream area. In the downward section, TMG is overlaid by the aquiclude from the Uitenhage Group which is responsible for the artesian conditions. Groundwater potential zones were classified as Poor, Fair, Good, and Excellent, with 65.4% and 8.7% of the upstream area attributed to Good and Excellent zones respectively. Both Modified Pitman and SWAT predicted decreasing rates of groundwater recharge in the upstream area over time, though Mann-Kendal trend tests done at 5% signifance level depicted significant decreasing rates in SWAT predicted recharge compared to Modified Pitman predicted recharge. The two models did also predict recharge and other water balance components with differing peaks, lows and timings. Modified Pitman predicted mean annual recharge of 63.3-92.8 mm where as SWAT predicted mean annual recharge of 14.4-182.8 mm. In reference to earlier findings within TMG areas, estimated percentages of groundwater recharge were close to those simulated by both Pitman and SWAT models. Modified Pitman and SWAT models appear to both be reasonable tools to estimate recharge in TMG setting, producing relatively similar results to one another and to other regional estimates. Since the current study estimated low recharge rates (Modified Pitman; ~9.3-13.6% MAP), (SWAT; ~2.1-26.7% MAP) which are close to those predicted in other TMG areas, the study recommends exercising caution when developing a water supply strategy in the current study area. The recharge rates within the pertinent recharging areas should be considered when designing and sitting abstraction points such as boreholes and a sustainable abstraction rate in any one borehole for improved sustainable management of groundwater resources. , Thesis (MSc) -- Faculty of Science, Institute for Water Research, 2024
- Full Text:
- Date Issued: 2024-04-04
Aptamer-based biosensor for prostate specific antigen detection using cobalt phthalocyanine-exfoliated graphite composites
- Authors: Benise, Emihle
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/434850 , vital:73110
- Description: The work focuses on the development of biosensors and their use for the detection of prostate specific antigen (PSA). Four cobalt phthalocyanines (CoPcs) complexes: (1) cobalt tetra pyridyloxy phthalocyanine, (2) cobalt tetra acetamidophenoxy phthalocyanine, (3) cobalt tris(acetamidophenoxy) mono benzoic acid phthalocyanine, and (4) cobalt tris(acetamidophenoxy) mono propionic acid phthalocyanine, an exfoliated graphite (EG), and aptamer are used to make probes for PSA detection. Each complex is π-π stacked onto the EG to form EG-CoPc(π-π) hybrid which was used to modify a glassy carbon electrode (GCE). EG and CoPc were also used to modify the GCE sequential (seq) with CoPc on top to give GCE-EG-CoPc(seq). For the detection PSA, PSA specific aptamer was either sequential added or covalently linked to complexes 3 and 4 on the modified electrodes and was only sequentially added onto complexes 1 and 2 modified electrodes. Electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) were the techniques used for the detection of PSA. The electrodes were found to be selective in bovine serum albumin, glucose and cysteine and stable when 50 DPV scans were run. Electrodes gave good % recovery when human serum was spiked with different PSA concentrations. , Thesis (MSc) -- Faculty of Science, Chemistry, 2024
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- Date Issued: 2024-04-04
Attitudes and achievement in statistics: a meta-analytic and functional near-infrared spectroscopy approach
- Authors: Wagenaar, Emma Kate
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/435490 , vital:73162
- Description: Statistics anxiety describes the extensive worry and apprehension that students may experience when faced with statistics content as part of their university curriculums. Student’s perfunctory disposition towards statistics has been indicated to negatively affect performance outcomes in statistics courses. Two meta-analyses were conducted to investigate the relationship between statistics anxiety and achievement in statistics. The first meta-analysis was inclusive of 22 studies investigating the relationship attitudes towards statistics and achievement, whilst the second meta-analysis focused on the relationship, primary amongst Psychology students. Student’s attitudes towards statistics were measured using the Survey of Attitudes Towards Statistics (SATS), whilst achievement in statistics courses was quantified using different outcome measures. Finding from the meta-analysis were supplemented by cortical mapping of the neural correlates of statistical reasoning using functional near-infrared spectroscopy (fNIRS). Results from the meta-analysis indicated a small significant relationship between university students’ Affect, r = 0.28, Value, r = 0.22 and Difficulty, r = 0.18, and subsequent achievement in statistics courses. A medium significant relationship between Cognitive Competence, r = 0.31, and achievement was also noted. Findings from the second meta-analysis, indicated a medium, significant relationship between Affect, r = 0.32, and Cognitive Competence, r = 0.35, and achievement. Moreover, a small significant relationship was found between Value, r = 0.24, and Difficulty, r = 0.23, in relation to achievement in statistics courses. Case study analysis of the neural correlates of statistics reasoning revealed varied signal quality findings of cortical mapping of the neural correlates of statistics in the dorsolateral prefrontal cortex (DLPFC). Moreover, seed-based correlation analysis indicated cortical activation of the dorsolateral prefrontal cortex paired with diverse prefrontal regions. Recommendations from the study include improvements to the fNIRS research design and the inclusion of larger samples to investigate the cortical mapping of the DLPFC in relation to statistics reasoning and statistics anxiety. , Thesis (MA) -- Faculty of Humanities, Psychology, 2024
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- Date Issued: 2024-04-04
Computational design for genome reduction of Lactococcus lactis towards microbial chassis development
- Authors: Hamese, Saltiel
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/435321 , vital:73147
- Description: Access restricted. Expected release date 2026. , Thesis (MSc) -- Faculty of Science, Biotechnology Innovation Centre, 2024
- Full Text:
- Date Issued: 2024-04-04
Developing a community of practice to promote the use of biological control in the integrated management of Prosopis in South Africa
- Authors: Van Staden, Gretha
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/434998 , vital:73122
- Description: Prosopis spp. are non-native species present in the arid parts of southern Africa. These trees originated in the Americas and were first introduced as a source of fodder, shade, and wood, but have become invasive, negatively impacting local biodiversity, and disrupting the delivery of ecosystem services. Some species of Prosopis hybridise freely, complicating identification and subsequent control. The control of Prosopis in the Northern Cape Province of South Africa is still contentious, because of the perceived benefits to some landowners. The effectiveness of biological control agents to control the spread of Prosopis has been quantified, more damaging agents have been considered in recent years because of the continued increase in Prosopis density. Research into the establishment of a Community of Practice (CoP) to address the differences in perceptions regarding the control of Prosopis in the Northern Cape Province is considered an appropriate starting point to conceptualise the challenges to the successful integrated management of Prosopis. As farmers are the main stakeholders involved with Prosopis control, understanding the role of farmers and the functioning of farming enterprises in the Northern Cape is imperative for the development of both a CoP as well as the appropriate management of Prosopis. To foster engagement with as many stakeholders as possible, workshops dealing with biological control as part on an integrated approach to the control of Prosopis were held in towns in the Northern Cape Province: Groblershoop, Brandvlei, Kenhardt, Upington, Prieska and Williston. Some of the main concerns of the landusers include the host specificity of the released biocontrol agents, as well as increased transparency and communication. This is especially in regards to the research on present and future biological control agents that will possibly improve the perceptions of stakeholders. The mechanical harvesting and use of biomass as a control method was supported, especially where farmers were removing Prosopis from their properties, leaving large amounts of biomass in the veld. Continued research into Prosopis in the Northern Cape needs to consider the possibility of secondary invasions, especially in areas where native bush encroachment is already a concern. The impact of clearing in terms of natural grazing and animal improvement needs to be quantified, to conceptualise the importance of maintaining better veld quality versus using Prosopis for fodder. Biological control targeting not only the reproductive output of the trees, but also the standing biomass has support from the majority of the land users in the Northern Cape Province following these workshops and this study shows the importance of a socio-ecological approach to the control of landscape scale invasion. , Thesis (MSc) -- Faculty of Science, Zoology and Entomology, 2024
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- Date Issued: 2024-04-04
Educators’ experiences of psychosocial support workshops during COVID-19 in Eastern Cape, South Africa
- Authors: Mabasa, Rendani Mirriam
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/435457 , vital:73159
- Description: There is growing awareness of the value and central role of immediate and long-term mental health and psychosocial support (MHPSS) interventions, especially during times of crisis such as Covid-19. The World Health Organization has identified the education sector as a crucial intervention site for public mental health promotion. In collaboration with members of the Makhanda education community, the Rhodes University Community Engagement office identified psychosocial support for educators and educational practitioners as a key societal and educational challenge. Focusing specifically on the experiences of educators, this study sought to solicit their experiences of MHPSS workshops in a rural city of the Eastern Cape province of South Africa. Focus groups with educators and educational practitioners in non-government organisations, care centres and other educational settings who participated in the psychosocial support workshops were conducted. Data was analysed using community psychology’s social action framework. Four broad themes emerged from the data: the responsibilisation of educators during and post-Covid-19, educators’ resilience and support for each other, educators’ mental health promotion through psychosocial support workshops, and top-down intervention strategies that fall short in addressing educators’ and learners’ needs. This study demonstrates the value of university-community partnerships in education settings which are key sites for public mental health promotion. In this study, I advocate psychosocial support as a standard practice available for educational practitioners and show how professional training programmes in higher education can be responsive to societal challenges via collaborative approaches. , Thesis (MA) -- Faculty of Humanities, Psychology, 2024
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- Date Issued: 2024-04-04
Elucidation of the roles of the carbonic anhydrase enzymes, CanA & CanB, in the physiology of Mycobacterium smegmatis
- Authors: Jackson, Gabriella Teresa
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/435299 , vital:73145
- Description: The bacterial pathogen Mycobacterium tuberculosis (Mtb) is the causative agent of tuberculosis (TB) and one of the leading infectious causes of death globally. The success of Mtb as a pathogen depends on its ability to detect and respond to a variety of physical and chemical stresses it encounters during infection of its human host. These environmental stresses include shifts in temperature, oxygen concentration, osmolarity and nutrient availability. Mtb is, in addition, exposed to changes in pH and CO2 concentration in the intracellular and extracellular environments it inhabits, which the bacterium has to adapt to in order to ensure its growth, survival and/or persistence during infection. Carbonic anhydrases (CAs) are a widely distributed family of enzymes that catalyse the reversible hydration of carbon dioxide (CO2) to bicarbonate (HCO3−) in the reaction: CO2 + H2O ⇄ HCO3− + H+. In microbes, CA activity is important for the activity of enzymes involved in carbon fixation as well as for maintaining pH homeostasis. Mtb is known to express three CAs, encoded by the Rv3588c, Rv1284 and Rv3273 genes (canA, canB and canC, respectively). The role(s) of these CA enzymes in the physiology of Mtb and other mycobacterial species, such as Mycobacterium smegmatis (Msm), has not been elucidated to date. To gain insights into the function of the CanA and CanB enzymes in mycobacterial species, we generated both canA and canB knockdown (KD) and knockout (KO) mutants in the fast-growing mycobacterial species, Msm, and analysed their growth phenotypes under several growth conditions where CA activity is known to be required. Notably, Msm lacks the CanC homologue, which makes it an ideal surrogate to focus on CanA and CanB. The Msm canA KD mutant was found to display a growth defect following anhydrotetracycline (ATc)-mediated gene silencing at atmospheric (low) CO2 concentrations [~0.035% CO2 (v/v)]. The growth defect could be rescued by incubating cells at physiological (high) CO2 concentrations [~5% CO2 (v/v)] or by supplementing the growth media with either HCO3− or the metabolic end-products of certain HCO3−-dependent-carboxylase enzymes at low CO2 concentrations. The ability of these compounds to rescue the growth of the canA KD mutants was, however, dependent on the extent of ATc-mediated gene silencing, suggesting that the canA gene is required for Msm growth at both low and high CO2 concentrations. This was confirmed by our findings that canA could only be genetically inactivated when a second copy of the gene was provided on the chromosome in trans, regardless of the CO2 concentration used. In contrast to our observations for canA, no differences in the growth phenotypes of the Msm wild type (WT) and canB KD or knockout (KO) mutant strains were observed following silencing or inactivation of the canB gene at either low or high CO2 concentrations or different pH values. These observations suggest that, in contrast to canA, the canB gene is dispensable for the growth of Msm under standard laboratory growth conditions. The canB KO mutant strain, nevertheless, displayed a slight decrease in its ability to form biofilms when compared to the WT strain, which could be restored by genetic complementation. CanB activity may, therefore, be required to promote bacterial growth and/or survival under biofilm conditions where CO2 diffusion into cells is limited, a phenomenon that has recently been observed in other microbes. Further studies are required to confirm the role of CanB in biofilm formation and to determine how the different CA enzymes cooperate to promote the growth and survival of mycobacterial species in the various environments they are known to inhabit. , Thesis (MSc) -- Faculty of Science, Biochemistry and Microbiology, 2024
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- Date Issued: 2024-04-04
English morphological awareness and reading comprehension in deaf and hearing grade 3 to 7 learners from Lesotho
- Authors: Tšehla, Puleng Magret
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/${Handle} , vital:73169
- Description: There is a noticeable literacy crisis observed in both Deaf and hearing learners from Lesotho. This study investigates the English Morphological Awareness and reading comprehension of 26 Deaf and 82 hearing learners enrolled in grades 3 to 7 in two schools in Lesotho. This study employs a correlational cross-sectional quantitative design. Each participant completed two literacy assessment tasks: a reading comprehension task and a Morphological Awareness task. The Morphological Awareness task encompassed five subtasks that assessed the learners’ inflectional, derivational, and compound awareness. The results of these assessments are analysed through appropriate statistical analyses. In addition, errors made by the Deaf and hearing learners on the literacy assessments are compared and analysed. This analysis determines the types of errors made by each group and identifies the factors that influence these errors. The performance of both groups in terms of task scores, in general, was low. Deaf learners and hearing learners’ performance on the tasks was similar. This outcome contradicts most previous studies, which indicate that Deaf learners typically exhibit lower levels of Morphological Awareness development and reading comprehension compared to their hearing counterparts. The results of this study also suggest that there is a statistically significant relationship between Morphological Awareness and reading comprehension in both groups. Finally, Deaf and hearing learners made similar errors on the tasks. There was some evidence of influence from both the Deaf and hearing learners’ first languages (Sesotho and Lesotho Sign Language, respectively). The study demonstrates the need for more explicit morphological instruction to improve both Deaf and hearing learners’ literacy. , Thesis (MA) -- Faculty of Humanities, Linguistics and Applied Language Studies, 2024
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- Date Issued: 2024-04-04
Functional significance of mixed-species groups for zebra (Equus quagga) in savanna habitats
- Authors: Corry-Roberts, Carys Alexandra
- Date: 2024-04-04
- Subjects: Uncatalogued
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/434925 , vital:73116
- Description: Globally, herbivore populations are facing decline, which threatens their crucial role within the ecosystems they inhabit. Herbivores are essential to ecosystem structure and function because they act as prey for higher trophic levels, cycle soil nutrients, and alter vegetation structure. Understanding the drivers that shape herbivore habitat use and selection are therefore critical for making informed conservation and management decisions. Like all prey species, herbivores must balance a trade-off between acquiring resources and avoiding predation which is influenced by a number of species-specific intrinsic traits and various ecological drivers. Herbivores can also track risk over space and time, and certain habitat structures and landscape features can influence risk perception; this is termed the landscape of fear. To mitigate the risk-reward trade-off, herbivores employ a suite of behavioural responses. Group formation is likely the most well-documented of these responses. However, grouping results in the information-competition trade-off, wherein group members may obtain valuable information regarding the location of resources and/or the risk of predation, but may suffer from increased competition, especially among larger group sizes. Mixed-species groups—an assemblage of two or more species in close spatial association—have the potential to mitigate some of the competitive costs of larger conspecific groups and enhance the anti-predator and/or foraging benefits of grouping. African savannas provide a particularly useful natural laboratory to study mixed-species groups, due to the high diversity of prey species and habitat heterogeneity present. Previous studies have investigated the mixed-species effect within these systems, but have yet to quantify some of the identity-dependent costs and benefits associated with mixed-species herding. Thus, the overall aim of my study was to quantify the functional significance of mixed-species groups for zebra (Equus quagga) herding with two of their most common herding partners, impala (Aepyceros melampus) and wildebeest (Connochaetes taurinus). My study was conducted at multiple spatial scales in the southern portion of the Kruger National Park, South Africa between 2021 and 2022. I found that mixed-species herding altered zebra landscape use, resulting in a quantifiable intensification of habitat use compared to when they herd with conspecifics. I did not observe significant habitat expansion for zebra in mixed-species herds compared to single-species herds, likely because the anti-predator benefits of mixed-species herding convey enhanced foraging opportunities in already-safe habitats. Zebra foraging with impala achieved greater foraging success and experienced lower levels of competition, compared to zebra foraging with wildebeest. However, compared to foraging with conspecifics, the levelled landscape of fear zebra experienced when foraging with wildebeest resulted in increased foraging success across the landscape. My findings highlight the context-dependency of the costs and benefits associated with different herding partners for zebra, and suggest that in mixed-species herds with wildebeest, zebra experience increased potential fitness benefits compared to herding with impala or conspecifics. Overall, the findings of my study suggest that mixed-species herding is an important tool in the suite of anti-predator behaviours employed by prey species, and one with significant implications for survivorship, habitat use, and ultimately, community level interactions. , Thesis (MSc) -- Faculty of Science, Zoology and Entomology, 2024
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- Date Issued: 2024-04-04