A framework for establishing a distributed, daily-time-step water resources model based on a pre-existing spatially lumped monthly representation: A case study of the Grootdraai Catchment, South Africa
- Lazar, Sophia, Slaughter, Andrew, Griffin, Neil, Odume, Oghenekaro N
- Authors: Lazar, Sophia , Slaughter, Andrew , Griffin, Neil , Odume, Oghenekaro N
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/486391 , vital:79501 , xlink:href="https://doi.org/10.1016/j.ejrh.2025.102493"
- Description: Proprietary monthly lumped models are pragmatic tools for water resources management and planning. However, their low spatial granularity and limited transparency pose significant obstacles to effective water quantity and quality management, particularly in developing countries. This study aimed to develop a distributed, daily-time-step model for a developing country catchment based on an existing black-box, lumped, monthly representation.
- Full Text:
- Date Issued: 2025
- Authors: Lazar, Sophia , Slaughter, Andrew , Griffin, Neil , Odume, Oghenekaro N
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/486391 , vital:79501 , xlink:href="https://doi.org/10.1016/j.ejrh.2025.102493"
- Description: Proprietary monthly lumped models are pragmatic tools for water resources management and planning. However, their low spatial granularity and limited transparency pose significant obstacles to effective water quantity and quality management, particularly in developing countries. This study aimed to develop a distributed, daily-time-step model for a developing country catchment based on an existing black-box, lumped, monthly representation.
- Full Text:
- Date Issued: 2025
Beyond prose: Review of 'Poetic Inquiry for the Humanities and Social Sciences: Voices from the South and the North'
- Authors: McKenna, Sioux
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/480817 , vital:78479 , https://hdl.handle.net/10520/ejc-sajsci-v121-n3-a11
- Description: The 54 authors of this book reflect on the use of poetic inquiry at a time when feminist, decolonial, and post-humanist researchers are raising concerns about the ways in which qualitative data collection and dissemination can silence some and reduce the experiences of others by adhering to the often-arbitrary restrictions of academic texts. Poetic inquiry, the authors of this book argue, should be welcoming, invite new perspectives, and make possible alternative interpretations of the social world. Sadly, as Pithouse-Morgan indicates, poetry is often associated with negative rather than positive educational experiences (p.201). For many of us, poetry is about mysterious meanings that our schoolteachers berated us for being too dense to access. While my own interest in poetic inquiry is in how we can use it to create and disseminate research, many authors in this book, such as Hough, Peté and Ndlovu, suggest that poetry can also be used “to teach complex topics from different points of view, make people more self-aware, encourage dialogue and empathy, grow social awareness, and raise ethical questions” (p.169). Badenhorst and McLeod point out that this can be challenging when working in neoliberal universities that turn us into human capital in service of competition and efficiency over social justice and equity. They suggest that poetry can help us to shift to a world “of senses and feeling [that] can provide a way to resist the tendrils of neoliberalism” (p.126).
- Full Text:
- Date Issued: 2025
- Authors: McKenna, Sioux
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/480817 , vital:78479 , https://hdl.handle.net/10520/ejc-sajsci-v121-n3-a11
- Description: The 54 authors of this book reflect on the use of poetic inquiry at a time when feminist, decolonial, and post-humanist researchers are raising concerns about the ways in which qualitative data collection and dissemination can silence some and reduce the experiences of others by adhering to the often-arbitrary restrictions of academic texts. Poetic inquiry, the authors of this book argue, should be welcoming, invite new perspectives, and make possible alternative interpretations of the social world. Sadly, as Pithouse-Morgan indicates, poetry is often associated with negative rather than positive educational experiences (p.201). For many of us, poetry is about mysterious meanings that our schoolteachers berated us for being too dense to access. While my own interest in poetic inquiry is in how we can use it to create and disseminate research, many authors in this book, such as Hough, Peté and Ndlovu, suggest that poetry can also be used “to teach complex topics from different points of view, make people more self-aware, encourage dialogue and empathy, grow social awareness, and raise ethical questions” (p.169). Badenhorst and McLeod point out that this can be challenging when working in neoliberal universities that turn us into human capital in service of competition and efficiency over social justice and equity. They suggest that poetry can help us to shift to a world “of senses and feeling [that] can provide a way to resist the tendrils of neoliberalism” (p.126).
- Full Text:
- Date Issued: 2025
Investigating the Transparency of Language for Place Value Understanding Comparing Indigenous Southern African Languages and European-based Languages
- Larkin, Kevin, Vale, Pamela, Ladel, Silke, Westaway, Lise, Graven, Mellony, Kortenkamp, Ulrich
- Authors: Larkin, Kevin , Vale, Pamela , Ladel, Silke , Westaway, Lise , Graven, Mellony , Kortenkamp, Ulrich
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/482410 , vital:78648 , https://doi.org/10.1080/18117295.2024.2438452
- Description: In this article we investigate the transparency of language in learning place value in either a Southern African indigenous language (isiXhosa, Setswana, Oshiwambo or Emakhuwa) or a European-based language (Afrikaans, English, German or Portuguese). Since language is a key mediator in developing place value understanding, it is important to investigate the ways in which the transparency of various languages may impact place value learning. A review of pertinent literature and an analysis of literal translations of number words (to thousands) of our eight languages lead us to the conclusion that Southern African indigenous languages are more accessible in their meaning, in relation to place value, than the four European-based languages spoken in Southern Africa, which we analysed. We identified two key advantages in the indigenous languages: (i) there was transparency of the ‘places’ in how numbers are named; and (ii) there was logical alignment between the spoken and symbolic representation of numbers. Despite this, many Southern African learners learn mathematics in English, Afrikaans or Portuguese even though this is not their home language (L1). This means that many learners are denied access to the transparency of the place value concepts that exist in their L1 and must manage learning place value, not only in a yet to be learned ‘foreign’ language, but also in one where they must learn to decode the idiosyncratic ‘irregularities’ of the way those languages name numbers. We conclude this article by discussing the implications of these findings for the teaching of place value in Southern African classrooms, in which indigenous learners are often learning in a European-based language that is not their L1.
- Full Text:
- Date Issued: 2025
- Authors: Larkin, Kevin , Vale, Pamela , Ladel, Silke , Westaway, Lise , Graven, Mellony , Kortenkamp, Ulrich
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/482410 , vital:78648 , https://doi.org/10.1080/18117295.2024.2438452
- Description: In this article we investigate the transparency of language in learning place value in either a Southern African indigenous language (isiXhosa, Setswana, Oshiwambo or Emakhuwa) or a European-based language (Afrikaans, English, German or Portuguese). Since language is a key mediator in developing place value understanding, it is important to investigate the ways in which the transparency of various languages may impact place value learning. A review of pertinent literature and an analysis of literal translations of number words (to thousands) of our eight languages lead us to the conclusion that Southern African indigenous languages are more accessible in their meaning, in relation to place value, than the four European-based languages spoken in Southern Africa, which we analysed. We identified two key advantages in the indigenous languages: (i) there was transparency of the ‘places’ in how numbers are named; and (ii) there was logical alignment between the spoken and symbolic representation of numbers. Despite this, many Southern African learners learn mathematics in English, Afrikaans or Portuguese even though this is not their home language (L1). This means that many learners are denied access to the transparency of the place value concepts that exist in their L1 and must manage learning place value, not only in a yet to be learned ‘foreign’ language, but also in one where they must learn to decode the idiosyncratic ‘irregularities’ of the way those languages name numbers. We conclude this article by discussing the implications of these findings for the teaching of place value in Southern African classrooms, in which indigenous learners are often learning in a European-based language that is not their L1.
- Full Text:
- Date Issued: 2025
Macroinvertebrate colonisation of macroplastic litter in minimally disturbed river sites, Eastern Cape, South Africa
- Ali, Andrew A, Akamagwuna, Frank C, Nnadozie, Chika F, Odume, Oghenekaro N
- Authors: Ali, Andrew A , Akamagwuna, Frank C , Nnadozie, Chika F , Odume, Oghenekaro N
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484474 , vital:78916 , https://doi.org/10.1007/s10452-024-10159-6
- Description: Macroplastic pollution remains a growing global environmental concern, and our understanding of its interaction with aquatic organisms is underdeveloped. It is also less clear how hydraulic biotopes influence macroinvertebrates colonisation of macroplastic relative to natural substrates. We investigated temporal and spatial patterns of macroinvertebrate colonisation on macroplastic litters in contrasting stream hydraulic biotopes (riffle, pool, and run) in minimally impacted headwater streams of Eastern Cape, South Africa. Plastic substrates of different proportions of natural and plastic litter were deployed across four sites. The Substrate group included 100% natural substrates (NS), 50% natural material and 50% plastic litters (NP), and 100% plastic (PD) litters. Each substrate group was deployed in riffle, pool, and run habitats for six months at each site.
- Full Text:
- Date Issued: 2025
- Authors: Ali, Andrew A , Akamagwuna, Frank C , Nnadozie, Chika F , Odume, Oghenekaro N
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484474 , vital:78916 , https://doi.org/10.1007/s10452-024-10159-6
- Description: Macroplastic pollution remains a growing global environmental concern, and our understanding of its interaction with aquatic organisms is underdeveloped. It is also less clear how hydraulic biotopes influence macroinvertebrates colonisation of macroplastic relative to natural substrates. We investigated temporal and spatial patterns of macroinvertebrate colonisation on macroplastic litters in contrasting stream hydraulic biotopes (riffle, pool, and run) in minimally impacted headwater streams of Eastern Cape, South Africa. Plastic substrates of different proportions of natural and plastic litter were deployed across four sites. The Substrate group included 100% natural substrates (NS), 50% natural material and 50% plastic litters (NP), and 100% plastic (PD) litters. Each substrate group was deployed in riffle, pool, and run habitats for six months at each site.
- Full Text:
- Date Issued: 2025
Neoliberalism constrains academic freedom
- Authors: McKenna, Sioux
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/480540 , vital:78453 , https://hdl.handle.net/10520/ejc-sajsci-v121-n3-a18
- Description: Positioning the university as a public good that serves people and the planet was a central concern for those responsible for shaping post-apartheid education. Unfortunately, the current neoliberal environment has led to institutional risk aversion. This means that universities are loathe to speak out on issues of social injustice and environmental degradation. And academics often forfeit their freedoms by assuming that top management can speak on behalf of the university. In the Commentary 'Should our universities respond to geopolitical conflicts around the world?'1, Chetty questions when and why a university should speak out on global issues. In particular, Chetty refers to the Israeli-Palestinian war. I leave it to other respondents to tackle the substantive issue of South African higher education's silence on this issue. Instead, I home in on what I see as a common problem in the post-apartheid university. Chetty explains that: He thus understands the university as a complex organisation, as indeed it is. But he repeatedly reveals an understanding of the university as one which is controlled by management. For me, one of the most troubling sentences in the article is this: Universities thrive on a diversity of viewpoints, and so imposing a hegemonic view from the top management often leads to problems in a university setting.
- Full Text:
- Date Issued: 2025
- Authors: McKenna, Sioux
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/480540 , vital:78453 , https://hdl.handle.net/10520/ejc-sajsci-v121-n3-a18
- Description: Positioning the university as a public good that serves people and the planet was a central concern for those responsible for shaping post-apartheid education. Unfortunately, the current neoliberal environment has led to institutional risk aversion. This means that universities are loathe to speak out on issues of social injustice and environmental degradation. And academics often forfeit their freedoms by assuming that top management can speak on behalf of the university. In the Commentary 'Should our universities respond to geopolitical conflicts around the world?'1, Chetty questions when and why a university should speak out on global issues. In particular, Chetty refers to the Israeli-Palestinian war. I leave it to other respondents to tackle the substantive issue of South African higher education's silence on this issue. Instead, I home in on what I see as a common problem in the post-apartheid university. Chetty explains that: He thus understands the university as a complex organisation, as indeed it is. But he repeatedly reveals an understanding of the university as one which is controlled by management. For me, one of the most troubling sentences in the article is this: Universities thrive on a diversity of viewpoints, and so imposing a hegemonic view from the top management often leads to problems in a university setting.
- Full Text:
- Date Issued: 2025
Occurrence and distribution of microplastics in functionally delineated hydraulic zones in selected Rivers, Eastern Cape, South Africa
- Owowenu, Enahora K, Nnadozie, Chika F, Akamagwuna, Frank C, Siwe-Noundou, Xavier, Odume, Oghenekaro N
- Authors: Owowenu, Enahora K , Nnadozie, Chika F , Akamagwuna, Frank C , Siwe-Noundou, Xavier , Odume, Oghenekaro N
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/486608 , vital:79526 , xlink:href="https://doi.org/10.1016/j.envpol.2025.126544"
- Description: Microplastic pollution in freshwater ecosystems has garnered increasing attention due to its ecological risks and potential impacts on human health. While numerous studies have addressed microplastic prevalence in rivers, a critical gap remains in understanding their spatial distribution within the geomorphological and hydraulic structure of river channels. This study investigated the occurrence and variability of microplastics across hydraulic units in two urban river systems, the Buffalo and Swartkops Rivers, in the Eastern Cape Province of South Africa. Hydraulic units were categorised into flush (riffles and runs) and sink (pools and backwaters) hydraulic zones, based on in situ measurements of flow velocity, depth, and substrate composition. Flush zones were hypothesised to promote microplastic remobilisation due to higher flow energy, whereas sink zones were expected to favour microplastic deposition owing to reduced hydraulic energy. Samples of surface water (suspended microplastics) and sediment-water mixtures (settled, then resuspended microplastics) were collected across these units in both the wet/hot and dry/cold seasons.
- Full Text:
- Date Issued: 2025
- Authors: Owowenu, Enahora K , Nnadozie, Chika F , Akamagwuna, Frank C , Siwe-Noundou, Xavier , Odume, Oghenekaro N
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/486608 , vital:79526 , xlink:href="https://doi.org/10.1016/j.envpol.2025.126544"
- Description: Microplastic pollution in freshwater ecosystems has garnered increasing attention due to its ecological risks and potential impacts on human health. While numerous studies have addressed microplastic prevalence in rivers, a critical gap remains in understanding their spatial distribution within the geomorphological and hydraulic structure of river channels. This study investigated the occurrence and variability of microplastics across hydraulic units in two urban river systems, the Buffalo and Swartkops Rivers, in the Eastern Cape Province of South Africa. Hydraulic units were categorised into flush (riffles and runs) and sink (pools and backwaters) hydraulic zones, based on in situ measurements of flow velocity, depth, and substrate composition. Flush zones were hypothesised to promote microplastic remobilisation due to higher flow energy, whereas sink zones were expected to favour microplastic deposition owing to reduced hydraulic energy. Samples of surface water (suspended microplastics) and sediment-water mixtures (settled, then resuspended microplastics) were collected across these units in both the wet/hot and dry/cold seasons.
- Full Text:
- Date Issued: 2025
Our Ocean Is Sacred, You Can't Mine Heaven
- McGarry, Dylan K, McConnachie, Boudina E
- Authors: McGarry, Dylan K , McConnachie, Boudina E
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/480205 , vital:78406 , ISBN 9781003381846 , https://doi.org/10.4324/978100338184
- Description: ‘Our Ocean Is Sacred, You Can’t Mine Heaven’ was a ground-breaking South African public storytelling initiative that not only emphasised the intrinsic and cultural value of the ocean but also served as a living-customary lore/law classroom. This exhibition challenged conventional archiving, promoting diversity, sovereignty and evolving ‘meaning-making,’ fostering inclusivity and justice-oriented documentation in ocean knowledge. The authors worked alongside Indigenous coastal communities and Small-Scale Fishers (SSF), who were aligned with movements defending the ocean against unchecked Blue Economy expansion in South Africa. The chapter delves into how artist-led practices, strategically embedded with legal research, played a pivotal role in a recent court ruling favouring Indigenous and SSF applicants. This victory renewed attention on ocean heritages in legal processes, highlighting the potential for expanding evidence ‘an-archives.’ The collaboration with coastal communities and SSF against unbridled ocean development used art to secure a court win, reshaping South African law and challenging norms in ocean development. This chapter explores art’s role in legal innovation, contributing to the ongoing struggle for justice and the decolonisation of blue economy narratives and processes in South Africa.
- Full Text:
- Date Issued: 2025
- Authors: McGarry, Dylan K , McConnachie, Boudina E
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/480205 , vital:78406 , ISBN 9781003381846 , https://doi.org/10.4324/978100338184
- Description: ‘Our Ocean Is Sacred, You Can’t Mine Heaven’ was a ground-breaking South African public storytelling initiative that not only emphasised the intrinsic and cultural value of the ocean but also served as a living-customary lore/law classroom. This exhibition challenged conventional archiving, promoting diversity, sovereignty and evolving ‘meaning-making,’ fostering inclusivity and justice-oriented documentation in ocean knowledge. The authors worked alongside Indigenous coastal communities and Small-Scale Fishers (SSF), who were aligned with movements defending the ocean against unchecked Blue Economy expansion in South Africa. The chapter delves into how artist-led practices, strategically embedded with legal research, played a pivotal role in a recent court ruling favouring Indigenous and SSF applicants. This victory renewed attention on ocean heritages in legal processes, highlighting the potential for expanding evidence ‘an-archives.’ The collaboration with coastal communities and SSF against unbridled ocean development used art to secure a court win, reshaping South African law and challenging norms in ocean development. This chapter explores art’s role in legal innovation, contributing to the ongoing struggle for justice and the decolonisation of blue economy narratives and processes in South Africa.
- Full Text:
- Date Issued: 2025
Shifting from Development to Empowerment Through Eco-Creative Knowledge Transmission
- McConnachie, Boudina E, Porri, Francesca, Wynberg, Rachel
- Authors: McConnachie, Boudina E , Porri, Francesca , Wynberg, Rachel
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/480246 , vital:78410 , ISBN 9781003289838 , https://doi.org/10.4324/9781003289838
- Description: Conventional definitions of development can be linked to socio-economic and cultural impositions of the Global North on developing societies. These development frameworks were inherited from the colonial system, which devalued local ways of knowing, being, and developing and continues to do so. Through a transdisciplinary or Boundary Crossing environmental case study that interrogates the use of heritage skills and knowledge for nature-based solutions relating to coastal shore regeneration, this chapter reflects on experiences of knowledge co-creation in the rural Eastern Cape Province setting of South Africa. Through the lens of African Musical Arts, which includes song and dance, storytelling, heritage skills, soundscapes, and more, this research seeks to shift the project perceptions of the scientists, engaged scholars, pracademics, practitioners and community researchers involved, from simple to multi-dimensional viewpoints. Using Traditional Cultural Expressions (TCEs) as catalysts, our goal is to emancipate transmission of knowledge from a developmental to an empowerment framework. Using the diverse disciplinary backgrounds of the authors, this chapter allows for a holistic examination of the development of an Audio Postcards exhibition, while interrogating the project centred on African theories, ecologies, and knowledge development.
- Full Text:
- Date Issued: 2025
- Authors: McConnachie, Boudina E , Porri, Francesca , Wynberg, Rachel
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/480246 , vital:78410 , ISBN 9781003289838 , https://doi.org/10.4324/9781003289838
- Description: Conventional definitions of development can be linked to socio-economic and cultural impositions of the Global North on developing societies. These development frameworks were inherited from the colonial system, which devalued local ways of knowing, being, and developing and continues to do so. Through a transdisciplinary or Boundary Crossing environmental case study that interrogates the use of heritage skills and knowledge for nature-based solutions relating to coastal shore regeneration, this chapter reflects on experiences of knowledge co-creation in the rural Eastern Cape Province setting of South Africa. Through the lens of African Musical Arts, which includes song and dance, storytelling, heritage skills, soundscapes, and more, this research seeks to shift the project perceptions of the scientists, engaged scholars, pracademics, practitioners and community researchers involved, from simple to multi-dimensional viewpoints. Using Traditional Cultural Expressions (TCEs) as catalysts, our goal is to emancipate transmission of knowledge from a developmental to an empowerment framework. Using the diverse disciplinary backgrounds of the authors, this chapter allows for a holistic examination of the development of an Audio Postcards exhibition, while interrogating the project centred on African theories, ecologies, and knowledge development.
- Full Text:
- Date Issued: 2025
Simplified Taxation in Africa: What We Know – and Need to Know
- Gallien, Max, Hoy, Christopher, Komatsu, Hitomi, Ozer, Ceren, Rogan, Michael, Van den Boogaard, Vanessa
- Authors: Gallien, Max , Hoy, Christopher , Komatsu, Hitomi , Ozer, Ceren , Rogan, Michael , Van den Boogaard, Vanessa
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/478250 , vital:78168 , DOI: 10.19088/ICTD.2025.012
- Description: Most economic operators in Africa are small and informal firms that fall under the purview of presumptive or simplified tax regimes (STRs). These taxes are expected to fulfil a range of functions, from raising revenue to facilitating formalisation and improving revenue authorities' data, and yet their effectiveness and impact are surprisingly under-researched. Meanwhile, emerging evidence suggests that STRs often raise little revenue, disproportionately impact low-income earners, and are inconsistently applied. This policy brief summarises what we know about simplified taxes in Africa, who pays them, and why they matter, while highlighting gaps in existing knowledge. It makes the argument that there is a need for a new policy conversation on simplified taxation, and one that is data-driven and evidence-based.
- Full Text:
- Date Issued: 2025
- Authors: Gallien, Max , Hoy, Christopher , Komatsu, Hitomi , Ozer, Ceren , Rogan, Michael , Van den Boogaard, Vanessa
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/478250 , vital:78168 , DOI: 10.19088/ICTD.2025.012
- Description: Most economic operators in Africa are small and informal firms that fall under the purview of presumptive or simplified tax regimes (STRs). These taxes are expected to fulfil a range of functions, from raising revenue to facilitating formalisation and improving revenue authorities' data, and yet their effectiveness and impact are surprisingly under-researched. Meanwhile, emerging evidence suggests that STRs often raise little revenue, disproportionately impact low-income earners, and are inconsistently applied. This policy brief summarises what we know about simplified taxes in Africa, who pays them, and why they matter, while highlighting gaps in existing knowledge. It makes the argument that there is a need for a new policy conversation on simplified taxation, and one that is data-driven and evidence-based.
- Full Text:
- Date Issued: 2025
Students’ changing accounts of chemical engineering: a longitudinal study in three countries
- Ashwin, Paul, Agrawal, Ashish, Blackie, Margaret A L, McArthur, Jan, Pitterson, Nicole, Smit, Reneé
- Authors: Ashwin, Paul , Agrawal, Ashish , Blackie, Margaret A L , McArthur, Jan , Pitterson, Nicole , Smit, Reneé
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484562 , vital:78949 , https://doi.org/10.1080/03043797.2025.2509633
- Description: In this article we examine how students’ accounts of chemical engineering change during their undergraduate degrees and whether these changes were related to the educational intentions of their degree programs in two English, two South African and two US universities. Based on interviews with forty-five students over the course of their undergraduate chemical engineering degree, we found that initially most students did not know what chemical engineering was or thought it was about undertaking chemistry on a large scale. By the end of their degrees, most students had reached a watershed account of chemical engineering and saw it as about the design of large-scale processes of production. The changes in students’ accounts of chemical engineering appeared to be related to the educational intentions of their degree programs. We explore the implications of these outcomes for curriculum development in chemical engineering.
- Full Text:
- Date Issued: 2025
- Authors: Ashwin, Paul , Agrawal, Ashish , Blackie, Margaret A L , McArthur, Jan , Pitterson, Nicole , Smit, Reneé
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484562 , vital:78949 , https://doi.org/10.1080/03043797.2025.2509633
- Description: In this article we examine how students’ accounts of chemical engineering change during their undergraduate degrees and whether these changes were related to the educational intentions of their degree programs in two English, two South African and two US universities. Based on interviews with forty-five students over the course of their undergraduate chemical engineering degree, we found that initially most students did not know what chemical engineering was or thought it was about undertaking chemistry on a large scale. By the end of their degrees, most students had reached a watershed account of chemical engineering and saw it as about the design of large-scale processes of production. The changes in students’ accounts of chemical engineering appeared to be related to the educational intentions of their degree programs. We explore the implications of these outcomes for curriculum development in chemical engineering.
- Full Text:
- Date Issued: 2025
The heterogeneous effects of macroeconomic and financial factors on financial deepening in Africa: evidence from a method of moments quantile regression analysis
- Sanga, Bahati, Aziakpono, Meshach J
- Authors: Sanga, Bahati , Aziakpono, Meshach J
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/469930 , vital:77308 , https://www.emerald.com/insight/content/doi/10.1108/jfep-07-2023-0199/full/html
- Description: This paper aims to investigate the heterogeneous effects of macroeconomic and financial factors across various distributions of financial deepening in 22 African countries over the past two decades (2000–2019). The paper uses a recent method of moments quantile regression, which accounts for the often overlooked heterogeneity effects. The analysis focuses on the banking sector, which is predominant in Africa, using a broad range of macroeconomic and financial indicators.
- Full Text:
- Date Issued: 2025
- Authors: Sanga, Bahati , Aziakpono, Meshach J
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/469930 , vital:77308 , https://www.emerald.com/insight/content/doi/10.1108/jfep-07-2023-0199/full/html
- Description: This paper aims to investigate the heterogeneous effects of macroeconomic and financial factors across various distributions of financial deepening in 22 African countries over the past two decades (2000–2019). The paper uses a recent method of moments quantile regression, which accounts for the often overlooked heterogeneity effects. The analysis focuses on the banking sector, which is predominant in Africa, using a broad range of macroeconomic and financial indicators.
- Full Text:
- Date Issued: 2025
The Legal and Social Context of Urban Movement, Housing, and Coping Mechanisms through Inheritance Practices amongst Women from Phokeng, Gugulethu, and Fingo Village
- Authors: Hellemann, Phemelo C
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484263 , vital:78890 , https://doi.org/10.1080/02582473.2024.2420216
- Description: South Africa’s urban restrictions in the twentieth century under colonial and apartheid administrations disenfranchised African women by limiting their mobility and access to housing. Oppressive land policies, pass laws, and patriarchal customary practices assigned low status to African women. The article uses an African feminist lens to analyse how colonial, racial, and traditional structures determined African women’s legal status in acquiring housing in urban areas. It then examines the strategies that women of Phokeng, Gugulethu, and Fingo Village used to access housing despite these restrictions. The Phokeng case examines how women navigated the dual identity of urban and rural living. The Gugulethu case shows how multigenerational living and matrilineal inheritance strategies around leasehold property empowered women to embrace female headship in the home from 1948. The Fingo Village case demonstrates the unconventional customary practices by which women could become custodians of family freehold property. These case studies demonstrate how inheritance became a mode of power and agency for African women. This African feminist comparative account adds to the literature on African women’s urban land narratives.
- Full Text:
- Date Issued: 2025
- Authors: Hellemann, Phemelo C
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484263 , vital:78890 , https://doi.org/10.1080/02582473.2024.2420216
- Description: South Africa’s urban restrictions in the twentieth century under colonial and apartheid administrations disenfranchised African women by limiting their mobility and access to housing. Oppressive land policies, pass laws, and patriarchal customary practices assigned low status to African women. The article uses an African feminist lens to analyse how colonial, racial, and traditional structures determined African women’s legal status in acquiring housing in urban areas. It then examines the strategies that women of Phokeng, Gugulethu, and Fingo Village used to access housing despite these restrictions. The Phokeng case examines how women navigated the dual identity of urban and rural living. The Gugulethu case shows how multigenerational living and matrilineal inheritance strategies around leasehold property empowered women to embrace female headship in the home from 1948. The Fingo Village case demonstrates the unconventional customary practices by which women could become custodians of family freehold property. These case studies demonstrate how inheritance became a mode of power and agency for African women. This African feminist comparative account adds to the literature on African women’s urban land narratives.
- Full Text:
- Date Issued: 2025
The taxed informal economy: Fiscal burdens and inequality in Accras
- Anyidoho, Nana A, Gallien, Max, Rogan, Michael, Van den Boogaard, Vanessa
- Authors: Anyidoho, Nana A , Gallien, Max , Rogan, Michael , Van den Boogaard, Vanessa
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/478095 , vital:78154 , https://doi.org/10.1016/j.worlddev.2024.106879
- Description: The common assumption that informal economies are untaxed has underpinned arguments that they represent an ‘untapped goldmine’ for government coffers. However, there has been limited empirical engagement with this assumption. While some studies have highlighted that many informal businesses pay both formal and informal taxes, there has been little systematic accounting of these payments. Using a novel dataset of 2,700 informal enterprises in the Accra metropolitan area in Ghana, this article presents the first geographically representative account of the nature, distribution and impact of taxation in an urban informal sector. We find that the majority of informal sector operators in this context pay a range of taxes and fees, which together amount to a significant burden, especially for low earners. Two key findings emerge in relation to the structure of these taxes. First, the incidence and burden of tax payments is highly uneven and strongly correlated with visibility to the state, suggesting that taxation is driven more by patterns of state enforcement than the choices of informal operators. Second, taxes and fees are highly regressive, with lower-earning operators paying significantly more in relation to their earnings. These findings have important implications for both our conception of informal businesses and efforts to tax informal businesses in low- and middle-income countries.
- Full Text:
- Date Issued: 2025
- Authors: Anyidoho, Nana A , Gallien, Max , Rogan, Michael , Van den Boogaard, Vanessa
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/478095 , vital:78154 , https://doi.org/10.1016/j.worlddev.2024.106879
- Description: The common assumption that informal economies are untaxed has underpinned arguments that they represent an ‘untapped goldmine’ for government coffers. However, there has been limited empirical engagement with this assumption. While some studies have highlighted that many informal businesses pay both formal and informal taxes, there has been little systematic accounting of these payments. Using a novel dataset of 2,700 informal enterprises in the Accra metropolitan area in Ghana, this article presents the first geographically representative account of the nature, distribution and impact of taxation in an urban informal sector. We find that the majority of informal sector operators in this context pay a range of taxes and fees, which together amount to a significant burden, especially for low earners. Two key findings emerge in relation to the structure of these taxes. First, the incidence and burden of tax payments is highly uneven and strongly correlated with visibility to the state, suggesting that taxation is driven more by patterns of state enforcement than the choices of informal operators. Second, taxes and fees are highly regressive, with lower-earning operators paying significantly more in relation to their earnings. These findings have important implications for both our conception of informal businesses and efforts to tax informal businesses in low- and middle-income countries.
- Full Text:
- Date Issued: 2025
The taxed informal economy: Fiscal burdens and inequality in Accras
- Anyidoho, Nana A, Gallien, Max, Rogan, Michael, Van den Boogaard, Vanessa
- Authors: Anyidoho, Nana A , Gallien, Max , Rogan, Michael , Van den Boogaard, Vanessa
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/478084 , vital:78153 , https://doi.org/10.1016/j.worlddev.2024.106879
- Description: The common assumption that informal economies are untaxed has underpinned arguments that they represent an ‘untapped goldmine’ for government coffers. However, there has been limited empirical engagement with this assumption. While some studies have highlighted that many informal businesses pay both formal and informal taxes, there has been little systematic accounting of these payments. Using a novel dataset of 2,700 informal enterprises in the Accra metropolitan area in Ghana, this article presents the first geographically representative account of the nature, distribution and impact of taxation in an urban informal sector. We find that the majority of informal sector operators in this context pay a range of taxes and fees, which together amount to a significant burden, especially for low earners. Two key findings emerge in relation to the structure of these taxes. First, the incidence and burden of tax payments is highly uneven and strongly correlated with visibility to the state, suggesting that taxation is driven more by patterns of state enforcement than the choices of informal operators. Second, taxes and fees are highly regressive, with lower-earning operators paying significantly more in relation to their earnings. These findings have important implications for both our conception of informal businesses and efforts to tax informal businesses in low- and middle-income countries.
- Full Text:
- Date Issued: 2025
- Authors: Anyidoho, Nana A , Gallien, Max , Rogan, Michael , Van den Boogaard, Vanessa
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/478084 , vital:78153 , https://doi.org/10.1016/j.worlddev.2024.106879
- Description: The common assumption that informal economies are untaxed has underpinned arguments that they represent an ‘untapped goldmine’ for government coffers. However, there has been limited empirical engagement with this assumption. While some studies have highlighted that many informal businesses pay both formal and informal taxes, there has been little systematic accounting of these payments. Using a novel dataset of 2,700 informal enterprises in the Accra metropolitan area in Ghana, this article presents the first geographically representative account of the nature, distribution and impact of taxation in an urban informal sector. We find that the majority of informal sector operators in this context pay a range of taxes and fees, which together amount to a significant burden, especially for low earners. Two key findings emerge in relation to the structure of these taxes. First, the incidence and burden of tax payments is highly uneven and strongly correlated with visibility to the state, suggesting that taxation is driven more by patterns of state enforcement than the choices of informal operators. Second, taxes and fees are highly regressive, with lower-earning operators paying significantly more in relation to their earnings. These findings have important implications for both our conception of informal businesses and efforts to tax informal businesses in low- and middle-income countries.
- Full Text:
- Date Issued: 2025
The use of gabions as an eco-engineering approach to enhance estuarine fish habitats in urbanised waterways
- Seath, Jessica L, Firth, L B, Froneman, P William, Claassens, Louw
- Authors: Seath, Jessica L , Firth, L B , Froneman, P William , Claassens, Louw
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/479396 , vital:78297 , https://doi.org/10.1016/j.ecoleng.2024.10743
- Description: Anthropogenic activities are often concentrated around coastal ecosystems. Harbours and marinas comprising artificial structures with steeper orientations and reduced topographic complexities than natural ecosystems contribute to habitat alteration and biodiversity loss. Ecological engineering aims to mitigate these impacts by integrating ecological principles into coastal development to enhance habitat potential and improve biodiversity. This study investigated the potential of gabions (rock-filled wire mesh baskets) to enhance fish abundance and biodiversity by comparing these structures to conventional seawalls in an urbanised marina in Knysna, South Africa. Remote underwater video systems were used to determine fish diversity, abundance and composition over a 12-month period from August 2020 to August 2021. Overall, a significantly greater abundance and diversity of fish were associated with gabions compared to seawalls. Importantly, the gabions supported an endangered species, the Knysna seahorse (Hippocampus capensis), and two near threatened species recorded only on the gabions. This study highlights the efficacy of using structurally complex gabions as a viable ecoengineering alternative to less complex seawalls to enhance fish habitat.
- Full Text:
- Date Issued: 2025
- Authors: Seath, Jessica L , Firth, L B , Froneman, P William , Claassens, Louw
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/479396 , vital:78297 , https://doi.org/10.1016/j.ecoleng.2024.10743
- Description: Anthropogenic activities are often concentrated around coastal ecosystems. Harbours and marinas comprising artificial structures with steeper orientations and reduced topographic complexities than natural ecosystems contribute to habitat alteration and biodiversity loss. Ecological engineering aims to mitigate these impacts by integrating ecological principles into coastal development to enhance habitat potential and improve biodiversity. This study investigated the potential of gabions (rock-filled wire mesh baskets) to enhance fish abundance and biodiversity by comparing these structures to conventional seawalls in an urbanised marina in Knysna, South Africa. Remote underwater video systems were used to determine fish diversity, abundance and composition over a 12-month period from August 2020 to August 2021. Overall, a significantly greater abundance and diversity of fish were associated with gabions compared to seawalls. Importantly, the gabions supported an endangered species, the Knysna seahorse (Hippocampus capensis), and two near threatened species recorded only on the gabions. This study highlights the efficacy of using structurally complex gabions as a viable ecoengineering alternative to less complex seawalls to enhance fish habitat.
- Full Text:
- Date Issued: 2025
Towards a relational understanding of youth lifestyles and wellbeing in climate resilient urban development insights from a seven-city study of young people
- Prendergast, Kate, Hayward, Bronwyn, Aoyagi, Midori, Burningham, Kate, Hasan, M Mehedi, Jackson, Tim, Jha, Vimlendu, Loukianov, Anastasia, Mattar, Helio, Schudel, Ingrid J, Yoshida, Aya
- Authors: Prendergast, Kate , Hayward, Bronwyn , Aoyagi, Midori , Burningham, Kate , Hasan, M Mehedi , Jackson, Tim , Jha, Vimlendu , Loukianov, Anastasia , Mattar, Helio , Schudel, Ingrid J , Yoshida, Aya
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/482593 , vital:78669 , https://doi.org/10.1080/13549839.2025.2454985
- Description: Supporting youth wellbeing in low carbon ways is a crucial challenge in cities. Seventy percent of youth will live in urban areas by 2050 and urban sites account for 67–72% of the global share of carbon emissions. Young people’s consumption behaviour including energy use is increasingly identified as a key driver of urban emissions. This paper expands beyond dominant individualised approaches to examining urban youth wellbeing and consumption to interrogate the relational contexts in which young people live, their wellbeing aspirations, and the conditions that enable or lock-in lifestyle emissions. Applying a relational lens and thematic analysis to focus group data collected from 332 youth aged 12–24 years in seven cities of the global South and North, the paper examines experiences shaping youth wellbeing in the context of urban consumption activities. Findings emphasised the complexities of “linked lives”, foregrounding family, peer and community relationships as critical in shaping youth wellbeing and consumption.
- Full Text:
- Date Issued: 2025
- Authors: Prendergast, Kate , Hayward, Bronwyn , Aoyagi, Midori , Burningham, Kate , Hasan, M Mehedi , Jackson, Tim , Jha, Vimlendu , Loukianov, Anastasia , Mattar, Helio , Schudel, Ingrid J , Yoshida, Aya
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/482593 , vital:78669 , https://doi.org/10.1080/13549839.2025.2454985
- Description: Supporting youth wellbeing in low carbon ways is a crucial challenge in cities. Seventy percent of youth will live in urban areas by 2050 and urban sites account for 67–72% of the global share of carbon emissions. Young people’s consumption behaviour including energy use is increasingly identified as a key driver of urban emissions. This paper expands beyond dominant individualised approaches to examining urban youth wellbeing and consumption to interrogate the relational contexts in which young people live, their wellbeing aspirations, and the conditions that enable or lock-in lifestyle emissions. Applying a relational lens and thematic analysis to focus group data collected from 332 youth aged 12–24 years in seven cities of the global South and North, the paper examines experiences shaping youth wellbeing in the context of urban consumption activities. Findings emphasised the complexities of “linked lives”, foregrounding family, peer and community relationships as critical in shaping youth wellbeing and consumption.
- Full Text:
- Date Issued: 2025
Transformative learning in geography education: international perspectives and practices
- Wilmot, P Dianne, Bednarz, Sarah H, Fatima, Munazza, De la Vega, Alfonso G, Grob, Regula, Mäsgen, Johanna, Wilson, Sophie
- Authors: Wilmot, P Dianne , Bednarz, Sarah H , Fatima, Munazza , De la Vega, Alfonso G , Grob, Regula , Mäsgen, Johanna , Wilson, Sophie
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/483010 , vital:78711 , https://doi.org/10.1080/10382046.2025.2473104
- Description: This paper critically reflects on how transformative learning (TL) is described both conceptually and as a process in the literature in different fields and national contexts. We articulate a definition of TL and justify why geography education is an ideal vehicle for enabling it. This is followed by a series of case studies explaining how TL can be and is being implemented in the curriculum topic of climate change in different countries. The findings of the analysis of the case studies are used to make propositions for further development and enactment of TL in geography education. The insights provided by this paper may help to move the field forward by opening new avenues of research and providing opportunities for cultivating a stronger geography education voice in global discourses about the types of learning required in a time of socio-ecological crisis and rapid societal change. Furthermore, it may provide practical ideas for improving learning and enhancing teaching practices which curriculum developers, learning resource producers, and practitioners may find useful.
- Full Text:
- Date Issued: 2025
- Authors: Wilmot, P Dianne , Bednarz, Sarah H , Fatima, Munazza , De la Vega, Alfonso G , Grob, Regula , Mäsgen, Johanna , Wilson, Sophie
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/483010 , vital:78711 , https://doi.org/10.1080/10382046.2025.2473104
- Description: This paper critically reflects on how transformative learning (TL) is described both conceptually and as a process in the literature in different fields and national contexts. We articulate a definition of TL and justify why geography education is an ideal vehicle for enabling it. This is followed by a series of case studies explaining how TL can be and is being implemented in the curriculum topic of climate change in different countries. The findings of the analysis of the case studies are used to make propositions for further development and enactment of TL in geography education. The insights provided by this paper may help to move the field forward by opening new avenues of research and providing opportunities for cultivating a stronger geography education voice in global discourses about the types of learning required in a time of socio-ecological crisis and rapid societal change. Furthermore, it may provide practical ideas for improving learning and enhancing teaching practices which curriculum developers, learning resource producers, and practitioners may find useful.
- Full Text:
- Date Issued: 2025
Trends and geographic distribution of bacterial zoonoses in veterinary cases in the Eastern Cape: A ten-year retrospective analysis
- Nnadozie, Chika F, Odume, Oghenekaro N
- Authors: Nnadozie, Chika F , Odume, Oghenekaro N
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484518 , vital:78920 , https://doi.org/10.1016/j.jiph.2025.102738
- Description: Diseases affecting livestock can have ripple effects on surrounding ecosystems, especially by contaminating water sources. Their occurrence poses significant public health issues, especially in areas such as the Eastern Cape province in South Africa, susceptible to climatic variations and where people and animals often share water sources, increasing the risk of transmission of waterborne zoonoses. Waterborne zoonoses are infectious diseases caused by zoonotic pathogens, including bacteria, viruses, protozoa, and parasitic helminths transmitted from animals through the aquatic environment to humans and vice versa. Tracking zoonoses in livestock is an early indicator of potential contamination of water sources used by animals and humans. This study analysed trends in prevalence of water-transmissible bacterial zoonoses over ten years, identifying the most frequently recorded zoonoses, their geographical distribution, and determining the animal species most commonly associated with these diseases.
- Full Text:
- Date Issued: 2025
- Authors: Nnadozie, Chika F , Odume, Oghenekaro N
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484518 , vital:78920 , https://doi.org/10.1016/j.jiph.2025.102738
- Description: Diseases affecting livestock can have ripple effects on surrounding ecosystems, especially by contaminating water sources. Their occurrence poses significant public health issues, especially in areas such as the Eastern Cape province in South Africa, susceptible to climatic variations and where people and animals often share water sources, increasing the risk of transmission of waterborne zoonoses. Waterborne zoonoses are infectious diseases caused by zoonotic pathogens, including bacteria, viruses, protozoa, and parasitic helminths transmitted from animals through the aquatic environment to humans and vice versa. Tracking zoonoses in livestock is an early indicator of potential contamination of water sources used by animals and humans. This study analysed trends in prevalence of water-transmissible bacterial zoonoses over ten years, identifying the most frequently recorded zoonoses, their geographical distribution, and determining the animal species most commonly associated with these diseases.
- Full Text:
- Date Issued: 2025
Using Topic Specific Pedagogical Content Knowledge to Study Indigenous Knowledge Integration in Grade 11 Physical Science Lessons: Teachers’ Perspectives
- Mdleleni, Sinethemba, Ngcoza, Kenneth M
- Authors: Mdleleni, Sinethemba , Ngcoza, Kenneth M
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484360 , vital:78899 , https://doi.org/10.1080/18117295.2024.2444791
- Description: Many learners seem to struggle to grasp the concepts of forces and Newton’s law of motion, possibly owing to decontextualised teaching pedagogies used in science classrooms. This study investigates Grade 11 Physical Sciences teachers’ perspectives in South Africa on integrating Indigenous Knowledge (IK) to improve learners’ understanding of science, particularly in relation to forces and Newton’s laws of motion. It adopts a qualitative case study approach, grounded in interpretive and Indigenous research paradigms, and framed by the Ubuntu perspective, which emphasises community and collective well-being. Purposive sampling was used to select three voluntary participants, and data were generated through semi-structured interviews. Data analysis was based on Mavhunga and Rollnick’s Topic Specific Pedagogical Content Knowledge framework, focusing on learners’ prior knowledge, curricular saliency, difficulties in understanding, and teaching strategies. Key themes included learners’ prior knowledge, content prioritisation, challenges in integrating IK and conceptual teaching strategies.
- Full Text:
- Date Issued: 2025
- Authors: Mdleleni, Sinethemba , Ngcoza, Kenneth M
- Date: 2025
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/484360 , vital:78899 , https://doi.org/10.1080/18117295.2024.2444791
- Description: Many learners seem to struggle to grasp the concepts of forces and Newton’s law of motion, possibly owing to decontextualised teaching pedagogies used in science classrooms. This study investigates Grade 11 Physical Sciences teachers’ perspectives in South Africa on integrating Indigenous Knowledge (IK) to improve learners’ understanding of science, particularly in relation to forces and Newton’s laws of motion. It adopts a qualitative case study approach, grounded in interpretive and Indigenous research paradigms, and framed by the Ubuntu perspective, which emphasises community and collective well-being. Purposive sampling was used to select three voluntary participants, and data were generated through semi-structured interviews. Data analysis was based on Mavhunga and Rollnick’s Topic Specific Pedagogical Content Knowledge framework, focusing on learners’ prior knowledge, curricular saliency, difficulties in understanding, and teaching strategies. Key themes included learners’ prior knowledge, content prioritisation, challenges in integrating IK and conceptual teaching strategies.
- Full Text:
- Date Issued: 2025
A Feasibility Study on the Efficacy of Functional Near-Infrared Spectrometry (fNIRS) to Measure Prefrontal Activation in Paediatric HIV
- Zondo, Sizwe, Ferreira-Correia, Aline, Cockcroft, Kate
- Authors: Zondo, Sizwe , Ferreira-Correia, Aline , Cockcroft, Kate
- Date: 2024
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/450556 , vital:74960 , xlink:href="https://www.hindawi.com/journals/js/2024/4970794/"
- Description: Human immunodeficiency virus (HIV) infection is associated with disturbed neurotransmission and aberrant cortical networks. Although advances in the imaging of brain microarchitecture following neuroHIV has added to our knowledge of structural and functional changes associated with HIV, no data exists on paediatric HIV using optical neuroimaging techniques. This study investigated the feasibility of optical neuroimaging in paediatric HIV using functional near-infrared spectrometry (fNIRS). We measured prefrontal brain activation while participants executed a sustained attention task. We specifically tested whether patients living with HIV and study controls could perform the study protocol and whether we could measure the typical fNIRS haemodynamic response associated with neuronal activity. Eighteen participants (10 HIV participants, mean age: 13.9, SD = 1.66 years; 8 controls, mean age: 14.8, SD = 1.28 years), matched for sex, grade, and socio-economic status, were included in the study. All participants completed the Stroop colour word test (SCWT). Oxygenated haemoglobin concentration and the deoxygenated haemoglobin signal were recorded from the dorsolateral prefrontal cortex and the frontopolar area (FA) using fNIRS. The control group performed significantly better in terms of reaction time on the congruent and incongruent condition (congruent: t (16) = −3.36, : incongruent: ). A pooled group analysis of the sample indicated significant activation in the DLPF and FA to the congruent condition of the SCWT (). Although cortical activation was noted in the DLPF and the FA in each of the groups when analysed independently, this neural activation did not reach statistical significance. The results show promise that fNIRS techniques are feasible for assessing prefrontal cortical activity in paediatric HIV. Future studies should seek to reduce the signal-to-noise ratio and consider inter-individual variability when measuring prefrontal activation in paediatric samples.
- Full Text:
- Date Issued: 2024
- Authors: Zondo, Sizwe , Ferreira-Correia, Aline , Cockcroft, Kate
- Date: 2024
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/450556 , vital:74960 , xlink:href="https://www.hindawi.com/journals/js/2024/4970794/"
- Description: Human immunodeficiency virus (HIV) infection is associated with disturbed neurotransmission and aberrant cortical networks. Although advances in the imaging of brain microarchitecture following neuroHIV has added to our knowledge of structural and functional changes associated with HIV, no data exists on paediatric HIV using optical neuroimaging techniques. This study investigated the feasibility of optical neuroimaging in paediatric HIV using functional near-infrared spectrometry (fNIRS). We measured prefrontal brain activation while participants executed a sustained attention task. We specifically tested whether patients living with HIV and study controls could perform the study protocol and whether we could measure the typical fNIRS haemodynamic response associated with neuronal activity. Eighteen participants (10 HIV participants, mean age: 13.9, SD = 1.66 years; 8 controls, mean age: 14.8, SD = 1.28 years), matched for sex, grade, and socio-economic status, were included in the study. All participants completed the Stroop colour word test (SCWT). Oxygenated haemoglobin concentration and the deoxygenated haemoglobin signal were recorded from the dorsolateral prefrontal cortex and the frontopolar area (FA) using fNIRS. The control group performed significantly better in terms of reaction time on the congruent and incongruent condition (congruent: t (16) = −3.36, : incongruent: ). A pooled group analysis of the sample indicated significant activation in the DLPF and FA to the congruent condition of the SCWT (). Although cortical activation was noted in the DLPF and the FA in each of the groups when analysed independently, this neural activation did not reach statistical significance. The results show promise that fNIRS techniques are feasible for assessing prefrontal cortical activity in paediatric HIV. Future studies should seek to reduce the signal-to-noise ratio and consider inter-individual variability when measuring prefrontal activation in paediatric samples.
- Full Text:
- Date Issued: 2024