Topographic controls on the invasion of Pteronia incana (Blue bush) onto hillslopes in Ngqushwa (formerly Peddie) district, Eastern Cape, South Africa
- Kakembo, V, Rowntree, Kate M, Palmer, Anthony R
- Authors: Kakembo, V , Rowntree, Kate M , Palmer, Anthony R
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6689 , http://hdl.handle.net/10962/d1006708
- Description: The role of topographic factors in the invasion of hillslopes by Pteronia incana, an unpalatable shrub, was investigated. The study combined field observations with image analysis based on high-resolution infrared imagery. A Digital Elevation Model (DEM) of 20 m spatial resolution was used to derive terrain parameters. The Topographic Wetness Index (WI), a component of the TOPMODEL, was derived from the DEM and its relationship with the spatial distribution of P. incana was explored. The absence/presence of P. incana was noted to be strongly influenced by slope angle and aspect. The probability for P. incana occurrence increased with slope steepness and southerly slope orientation. Abandoned and grazing lands were identified as the main invasion hotspots on hillslopes. The combined influence of slope gradient and aspect, and land use was noted to have promoted the invasion. This is borne out by the concentration of the invasion on abandoned steep slopes with a southerly orientation. The WI confirmed the bearing local topographic variations have on P. incana spatial distribution such that, P. incana was associated with the low WI values of convexities. The coupling between local topography and soil surface crusting underpins soil moisture variability. This in turn determines the competition between the patchy P. incana and grass species and the eventual replacement of the latter by the former. Restoration efforts of the invaded lands should focus on trapping of sediment and litter, and moisture retention on the inter-patch bare areas.
- Full Text:
- Date Issued: 2007
- Authors: Kakembo, V , Rowntree, Kate M , Palmer, Anthony R
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6689 , http://hdl.handle.net/10962/d1006708
- Description: The role of topographic factors in the invasion of hillslopes by Pteronia incana, an unpalatable shrub, was investigated. The study combined field observations with image analysis based on high-resolution infrared imagery. A Digital Elevation Model (DEM) of 20 m spatial resolution was used to derive terrain parameters. The Topographic Wetness Index (WI), a component of the TOPMODEL, was derived from the DEM and its relationship with the spatial distribution of P. incana was explored. The absence/presence of P. incana was noted to be strongly influenced by slope angle and aspect. The probability for P. incana occurrence increased with slope steepness and southerly slope orientation. Abandoned and grazing lands were identified as the main invasion hotspots on hillslopes. The combined influence of slope gradient and aspect, and land use was noted to have promoted the invasion. This is borne out by the concentration of the invasion on abandoned steep slopes with a southerly orientation. The WI confirmed the bearing local topographic variations have on P. incana spatial distribution such that, P. incana was associated with the low WI values of convexities. The coupling between local topography and soil surface crusting underpins soil moisture variability. This in turn determines the competition between the patchy P. incana and grass species and the eventual replacement of the latter by the former. Restoration efforts of the invaded lands should focus on trapping of sediment and litter, and moisture retention on the inter-patch bare areas.
- Full Text:
- Date Issued: 2007
Econo-Language Planning and Transformation in South Africa: From Localisation to Globalisation
- Authors: Kaschula, Russell H
- Date: 2019
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/174657 , vital:42498 , ISBN 9781108425346
- Description: This chapter seeks to create an understanding of the historical, sociopolitical and economic context within which language planning has taken place in South Africa (Alexander 1992). Furthermore, the extent to which government agencies and other stakeholder bodies have taken language planning into account when developing economic and development policies within the contemporary global reality will be assessed (Edozie 2004). Policies (if one can call them policies) such as the New Partnership for Africa’s Development (NEPAD), as well as the National Development Plan (NDP) in South Africa are analysed against the backdrop of language policy planning and implementation, to see if there are linkages between opportunity language planning on the ground (Antia 2017) and economic development. In other words does language planning create work opportunities through policy creation and implementation where our languages are seen as resources to be used appropriately in the market place?.
- Full Text:
- Date Issued: 2019
- Authors: Kaschula, Russell H
- Date: 2019
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/174657 , vital:42498 , ISBN 9781108425346
- Description: This chapter seeks to create an understanding of the historical, sociopolitical and economic context within which language planning has taken place in South Africa (Alexander 1992). Furthermore, the extent to which government agencies and other stakeholder bodies have taken language planning into account when developing economic and development policies within the contemporary global reality will be assessed (Edozie 2004). Policies (if one can call them policies) such as the New Partnership for Africa’s Development (NEPAD), as well as the National Development Plan (NDP) in South Africa are analysed against the backdrop of language policy planning and implementation, to see if there are linkages between opportunity language planning on the ground (Antia 2017) and economic development. In other words does language planning create work opportunities through policy creation and implementation where our languages are seen as resources to be used appropriately in the market place?.
- Full Text:
- Date Issued: 2019
Technauriture: Multimedia Research and Documentation of African Oral Performance
- Authors: Kaschula, Russell H
- Date: 2012
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/175223 , vital:42554 , ISBN 9783643901309
- Description: This paper seeks to assess the contribution of technology to the preservation and popularizing of oral performance in Southern Africa. An example will be provided which looks at the oral poetry, izibongo, produced by Xhosa oral poet Bongani Sitole (both in book and technological form). It will trace this poetry from the moment it was orally produced, through to the technologising and publication of this poetry in book form and on a website. A number of websites will also be analysed. The initial part of the paper provides a contextual analysis of selected poetry. This genre will also be compared (in terms of technological influence) with more contemporary Southern African performers such as the story-teller, Gcina Mhlophe as well as Lebo Mashile and Botsotso, spoken word artists and the oral poet Zolani Mkiva. The latter part of the article concentrates on issues related to technology and its relationship to the oral and written word.
- Full Text:
- Date Issued: 2012
- Authors: Kaschula, Russell H
- Date: 2012
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/175223 , vital:42554 , ISBN 9783643901309
- Description: This paper seeks to assess the contribution of technology to the preservation and popularizing of oral performance in Southern Africa. An example will be provided which looks at the oral poetry, izibongo, produced by Xhosa oral poet Bongani Sitole (both in book and technological form). It will trace this poetry from the moment it was orally produced, through to the technologising and publication of this poetry in book form and on a website. A number of websites will also be analysed. The initial part of the paper provides a contextual analysis of selected poetry. This genre will also be compared (in terms of technological influence) with more contemporary Southern African performers such as the story-teller, Gcina Mhlophe as well as Lebo Mashile and Botsotso, spoken word artists and the oral poet Zolani Mkiva. The latter part of the article concentrates on issues related to technology and its relationship to the oral and written word.
- Full Text:
- Date Issued: 2012
The influence of cellular phone "speak" on isiXhosa rules of communication
- Kaschula, Russell H, Mostert, André
- Authors: Kaschula, Russell H , Mostert, André
- Date: 2009
- Subjects: Cell phones -- South Africa , Communication and culture -- Technological innovations , Language and culture -- South Africa , Xhosa (African people) -- Social life and customs
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59401 , vital:27594 , doi: 10.5842/37-0-43
- Description: Cellular telephones have revolutionised the art of communication across all societies, and South Africa is no exception. Access to this form of communication has made personal contact easier, in both rural and urban contexts. Globally this form of communication has been readily embraced. However, cultural rules that pertain to face-to-face communication are often flouted by cellular phone users. This flouting holds true no doubt across many cultures, languages and contexts. Bloomer (2005:97-100) assesses this flouting of cultural maxims in relation to Grice's cooperative principle. This article attempts to assess how general rules of politeness in isiXhosa have been and are being transformed by what could be termed the "economics of speaking".
- Full Text:
- Date Issued: 2009
- Authors: Kaschula, Russell H , Mostert, André
- Date: 2009
- Subjects: Cell phones -- South Africa , Communication and culture -- Technological innovations , Language and culture -- South Africa , Xhosa (African people) -- Social life and customs
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59401 , vital:27594 , doi: 10.5842/37-0-43
- Description: Cellular telephones have revolutionised the art of communication across all societies, and South Africa is no exception. Access to this form of communication has made personal contact easier, in both rural and urban contexts. Globally this form of communication has been readily embraced. However, cultural rules that pertain to face-to-face communication are often flouted by cellular phone users. This flouting holds true no doubt across many cultures, languages and contexts. Bloomer (2005:97-100) assesses this flouting of cultural maxims in relation to Grice's cooperative principle. This article attempts to assess how general rules of politeness in isiXhosa have been and are being transformed by what could be termed the "economics of speaking".
- Full Text:
- Date Issued: 2009
MARS: Motif Assessment and Ranking Suite for transcription factor binding motifs
- Kibet, Caleb K, Machanick, Philip
- Authors: Kibet, Caleb K , Machanick, Philip
- Date: 2016
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/61155 , vital:27985 , http://dx.doi.org/10.1101/065615
- Description: We describe MARS (Motif Assessment and Ranking Suite), a web-based suite of tools used to evaluate and rank PWM-based motifs. The increased number of learned motif models that are spread across databases and in different PWM formats, leading to a choice dilemma among the users, is our motivation. This increase has been driven by the difficulty of modelling transcription factor binding sites and the advance in high-throughput sequencing technologies at a continually reducing cost. Therefore, several experimental techniques have been developed resulting in diverse motif-finding algorithms and databases. We collate a wide variety of available motifs into a benchmark database, including the corresponding experimental ChIP-seq and PBM data obtained from ENCODE and UniPROBE databases, respectively. The implemented tools include: a data-independent consistency-based motif assessment and ranking (CB-MAR), which is based on the idea that `correct motifs' are more similar to each other while incorrect motifs will differ from each other; and a scoring and classification-based algorithms, which rank binding models by their ability to discriminate sequences known to contain binding sites from those without. The CB-MAR and scoring techniques have a 0.86 and 0.73 median rank correlation using ChIP-seq and PBM respectively. Best motifs selected by CB-MAR achieve a mean AUC of 0.75, comparable to those ranked by held out data at 0.76 { this is based on ChIP-seq motif discovery using five algorithms on 110 transcription factors. We have demonstrated the benefit of this web server in motif choice and ranking, as well as in motif.
- Full Text:
- Date Issued: 2016
- Authors: Kibet, Caleb K , Machanick, Philip
- Date: 2016
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/61155 , vital:27985 , http://dx.doi.org/10.1101/065615
- Description: We describe MARS (Motif Assessment and Ranking Suite), a web-based suite of tools used to evaluate and rank PWM-based motifs. The increased number of learned motif models that are spread across databases and in different PWM formats, leading to a choice dilemma among the users, is our motivation. This increase has been driven by the difficulty of modelling transcription factor binding sites and the advance in high-throughput sequencing technologies at a continually reducing cost. Therefore, several experimental techniques have been developed resulting in diverse motif-finding algorithms and databases. We collate a wide variety of available motifs into a benchmark database, including the corresponding experimental ChIP-seq and PBM data obtained from ENCODE and UniPROBE databases, respectively. The implemented tools include: a data-independent consistency-based motif assessment and ranking (CB-MAR), which is based on the idea that `correct motifs' are more similar to each other while incorrect motifs will differ from each other; and a scoring and classification-based algorithms, which rank binding models by their ability to discriminate sequences known to contain binding sites from those without. The CB-MAR and scoring techniques have a 0.86 and 0.73 median rank correlation using ChIP-seq and PBM respectively. Best motifs selected by CB-MAR achieve a mean AUC of 0.75, comparable to those ranked by held out data at 0.76 { this is based on ChIP-seq motif discovery using five algorithms on 110 transcription factors. We have demonstrated the benefit of this web server in motif choice and ranking, as well as in motif.
- Full Text:
- Date Issued: 2016
A South African response to ethics in legal education
- Authors: Kruuse, Helen
- Date: 2011
- Language: English
- Type: Article , text
- Identifier: http://hdl.handle.net/10962/54174 , vital:26399 , https://www.routledge.com/The-Ethics-Project-in-Legal-Education/Robertson-Corbin-Tranter-Bartlett/p/book/9780415546515
- Description: The contributions in this volume suggest that "the ethics project in legal education" is increasingly an international one. Even though the strength of commitment by both the profession and the legal academy to "ethics learning" within law schools varies, two fundamental questions confront all who work in this area. First, what is it that we want our students to learn (or, perhaps, in what manner do we want our students to develop) from the teaching of "legal ethics"? Second, how can we create a learning environment that will encourage the nature and quality of learning we think is important?.
- Full Text: false
- Date Issued: 2011
- Authors: Kruuse, Helen
- Date: 2011
- Language: English
- Type: Article , text
- Identifier: http://hdl.handle.net/10962/54174 , vital:26399 , https://www.routledge.com/The-Ethics-Project-in-Legal-Education/Robertson-Corbin-Tranter-Bartlett/p/book/9780415546515
- Description: The contributions in this volume suggest that "the ethics project in legal education" is increasingly an international one. Even though the strength of commitment by both the profession and the legal academy to "ethics learning" within law schools varies, two fundamental questions confront all who work in this area. First, what is it that we want our students to learn (or, perhaps, in what manner do we want our students to develop) from the teaching of "legal ethics"? Second, how can we create a learning environment that will encourage the nature and quality of learning we think is important?.
- Full Text: false
- Date Issued: 2011
You reap what you sow : regulating marriages and intimate partnerships in a diverse post-apartheid society
- Authors: Kruuse, Helen
- Date: 2013
- Language: English
- Type: Article , text
- Identifier: http://hdl.handle.net/10962/54152 , vital:26396 , https://tinyurl.com/yaughtn2
- Description: South Africa does not have a particularly proud history. Marred by the politics of separate but (un)equal treatment of its people, the country's past political system has had a damaging effect in all spheres, but specifically on that of the family. In the context of relationships, it is fair to say that the apartheid system was replicated in family law, with the Western 'white' monogamous marriage receiving the state's stamp of approval - leaving other relationships (customary, Muslim, homosexual, cohabiting etc) largely out in the cold.
- Full Text:
- Date Issued: 2013
- Authors: Kruuse, Helen
- Date: 2013
- Language: English
- Type: Article , text
- Identifier: http://hdl.handle.net/10962/54152 , vital:26396 , https://tinyurl.com/yaughtn2
- Description: South Africa does not have a particularly proud history. Marred by the politics of separate but (un)equal treatment of its people, the country's past political system has had a damaging effect in all spheres, but specifically on that of the family. In the context of relationships, it is fair to say that the apartheid system was replicated in family law, with the Western 'white' monogamous marriage receiving the state's stamp of approval - leaving other relationships (customary, Muslim, homosexual, cohabiting etc) largely out in the cold.
- Full Text:
- Date Issued: 2013
Genetic analysis of native and introduced populations of the aquatic weed Sagittaria platyphylla – implications for biological control in Australia and South Africa
- Kwong, Raelene M, Broadhurst, Linda M, Keener, Brian R, Coetzee, Julie A, Knerr, Nunzio, Martin, Grant D
- Authors: Kwong, Raelene M , Broadhurst, Linda M , Keener, Brian R , Coetzee, Julie A , Knerr, Nunzio , Martin, Grant D
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/76991 , vital:30653 , https://doi.org/10.1016/j.biocontrol.2017.06.002
- Description: Sagittaria platyphylla (Engelm.) J.G. Sm. (Alismataceae) is an emergent aquatic plant native to southern USA. Imported into Australia and South Africa as an ornamental and aquarium plant, the species is now a serious invader of shallow freshwater wetlands, slow-flowing rivers, irrigation channels, drains and along the margins of lakes and reservoirs. As a first step towards initiating a classical biological control program, a population genetic study was conducted to determine the prospects of finding compatible biological control agents and to refine the search for natural enemies to source populations with closest genetic match to Australian and South African genotypes. Using AFLP markers we surveyed genetic diversity and population genetic structure in 26 populations from the USA, 19 from Australia and 7 from South Africa. Interestingly, we have established that populations introduced into South Africa and to a lesser extent Australia have maintained substantial molecular genetic diversity comparable with that in the native range. Results from principal coordinates analysis, population graph theory and Bayesian-based clustering analysis all support the notion that introduced populations in Australia and South Africa were founded by multiple sources from the USA. Furthermore, the divergence of some Australian populations from the USA suggests that intraspecific hybridization between genetically distinct lineages from the native range may have occurred. The implications of these findings in relation to biological control are discussed.
- Full Text:
- Date Issued: 2017
- Authors: Kwong, Raelene M , Broadhurst, Linda M , Keener, Brian R , Coetzee, Julie A , Knerr, Nunzio , Martin, Grant D
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/76991 , vital:30653 , https://doi.org/10.1016/j.biocontrol.2017.06.002
- Description: Sagittaria platyphylla (Engelm.) J.G. Sm. (Alismataceae) is an emergent aquatic plant native to southern USA. Imported into Australia and South Africa as an ornamental and aquarium plant, the species is now a serious invader of shallow freshwater wetlands, slow-flowing rivers, irrigation channels, drains and along the margins of lakes and reservoirs. As a first step towards initiating a classical biological control program, a population genetic study was conducted to determine the prospects of finding compatible biological control agents and to refine the search for natural enemies to source populations with closest genetic match to Australian and South African genotypes. Using AFLP markers we surveyed genetic diversity and population genetic structure in 26 populations from the USA, 19 from Australia and 7 from South Africa. Interestingly, we have established that populations introduced into South Africa and to a lesser extent Australia have maintained substantial molecular genetic diversity comparable with that in the native range. Results from principal coordinates analysis, population graph theory and Bayesian-based clustering analysis all support the notion that introduced populations in Australia and South Africa were founded by multiple sources from the USA. Furthermore, the divergence of some Australian populations from the USA suggests that intraspecific hybridization between genetically distinct lineages from the native range may have occurred. The implications of these findings in relation to biological control are discussed.
- Full Text:
- Date Issued: 2017
Translation processes in the design of an education for sustainable development innovations course for universities in Africa
- Lotz-Sisitka, Heila, Lupele, Justin, Ogbuigwe, Akpezi
- Authors: Lotz-Sisitka, Heila , Lupele, Justin , Ogbuigwe, Akpezi
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127213 , vital:35978 , https://10.1080/02607470701259440
- Description: This paper traces the translation processes associated with the mobilization of resources and human agency in the development of a United Nations Environment Programme (UNEP) Education for Sustainable Development (ESD) Innovations Course for universities in Africa. University teachers are often neglected in teacher education initiatives. There are few formal professional development opportunities available for university teachers given the traditionally established hierarchy in the higher education sector as university teachers are normally the ones offering professional development to others. The paper explores how a participatory, deliberative translation process has served to provide professional development and professional exchange opportunities for university teachers which are non‐traditional and responsive to diversity, history, context and risk. The emergence of the modern African university is essentially a post‐independence (post‐1960s) phenomenon, with a few earlier African universities being colonially structured, controlled and inspired. Through a short historical overview, we introduce the African university landscape and some of its contemporary contextual and educational challenges. We then describe the process of deliberation that took place amongst university teachers from 23 African countries to initiate and establish the ESD Innovations Course. The paper concludes by arguing for open and participatory approaches in ESD teacher education course design, if we are to support university teachers (including teacher educators) to engage in mainstreaming environment and sustainability questions in higher education. The paper draws on the translation model provided by Latour in his actor network theory to describe and explain the deliberative translation process in the UNEP ESD Innovations Course. In doing this, it illuminates the possibilities of such a deliberative translation process for university teacher education. It also points to limitations encountered in applying this framework to this analysis, opening new vantage points for research of this nature in teacher education.
- Full Text:
- Date Issued: 2007
- Authors: Lotz-Sisitka, Heila , Lupele, Justin , Ogbuigwe, Akpezi
- Date: 2007
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127213 , vital:35978 , https://10.1080/02607470701259440
- Description: This paper traces the translation processes associated with the mobilization of resources and human agency in the development of a United Nations Environment Programme (UNEP) Education for Sustainable Development (ESD) Innovations Course for universities in Africa. University teachers are often neglected in teacher education initiatives. There are few formal professional development opportunities available for university teachers given the traditionally established hierarchy in the higher education sector as university teachers are normally the ones offering professional development to others. The paper explores how a participatory, deliberative translation process has served to provide professional development and professional exchange opportunities for university teachers which are non‐traditional and responsive to diversity, history, context and risk. The emergence of the modern African university is essentially a post‐independence (post‐1960s) phenomenon, with a few earlier African universities being colonially structured, controlled and inspired. Through a short historical overview, we introduce the African university landscape and some of its contemporary contextual and educational challenges. We then describe the process of deliberation that took place amongst university teachers from 23 African countries to initiate and establish the ESD Innovations Course. The paper concludes by arguing for open and participatory approaches in ESD teacher education course design, if we are to support university teachers (including teacher educators) to engage in mainstreaming environment and sustainability questions in higher education. The paper draws on the translation model provided by Latour in his actor network theory to describe and explain the deliberative translation process in the UNEP ESD Innovations Course. In doing this, it illuminates the possibilities of such a deliberative translation process for university teacher education. It also points to limitations encountered in applying this framework to this analysis, opening new vantage points for research of this nature in teacher education.
- Full Text:
- Date Issued: 2007
How does subjective well-being evolve with age? A literature review
- López Ulloa, Beatriz Fabiola, Moller, Valerie, Sousa-Poza, Alfonso
- Authors: López Ulloa, Beatriz Fabiola , Moller, Valerie , Sousa-Poza, Alfonso
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67185 , vital:29056 , https://doi.org/10.1007/s12062-013-9085-0
- Description: publisher version , This literature review provides an overview of the theoretical and empirical research in several disciplines on the relation between ageing and subjective well-being, i.e., how subjective well-being evolves across the lifespan. Because of the different methodologies, data sets and samples used, comparison among disciplines and studies is difficult. However, extant studies do show either a U-shaped, inverted U-shaped or linear relation between ageing and subjective well-being.
- Full Text: false
- Date Issued: 2013
- Authors: López Ulloa, Beatriz Fabiola , Moller, Valerie , Sousa-Poza, Alfonso
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67185 , vital:29056 , https://doi.org/10.1007/s12062-013-9085-0
- Description: publisher version , This literature review provides an overview of the theoretical and empirical research in several disciplines on the relation between ageing and subjective well-being, i.e., how subjective well-being evolves across the lifespan. Because of the different methodologies, data sets and samples used, comparison among disciplines and studies is difficult. However, extant studies do show either a U-shaped, inverted U-shaped or linear relation between ageing and subjective well-being.
- Full Text: false
- Date Issued: 2013
Re-deploying Parker, post-colonially: review essay
- Macleod, Catriona I, Wilbraham, Lindy
- Authors: Macleod, Catriona I , Wilbraham, Lindy
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6275 , http://hdl.handle.net/10962/d1008275
- Description: In this paper we review two of Ian Parker’s recent books: Critical discursive psychology and Qualitative psychology: Introducing radical research. Although the books address different audiences (academics versus students) and talk to different problematics (theory versus research), taken together they represent useful resources for those wishing to take a critical stance with regards to the standard fare of psychology, to use critical theory in understanding social and psychological phenomena, and to engage in progressive research. As such, both theory and research methods appear as “tools”, and we suggest reading Parker sideways, shifting his intellectual trajectory into directions that illuminate colonial and post-colonial issues through empirical/textual application to real South African contexts. By way of illustration, we offer a post-colonial reading of Parker’s work on post-modernism. Concluding comments on tactics for a “post-colonial analysis of discourses” are offered.
- Full Text:
- Date Issued: 2006
- Authors: Macleod, Catriona I , Wilbraham, Lindy
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6275 , http://hdl.handle.net/10962/d1008275
- Description: In this paper we review two of Ian Parker’s recent books: Critical discursive psychology and Qualitative psychology: Introducing radical research. Although the books address different audiences (academics versus students) and talk to different problematics (theory versus research), taken together they represent useful resources for those wishing to take a critical stance with regards to the standard fare of psychology, to use critical theory in understanding social and psychological phenomena, and to engage in progressive research. As such, both theory and research methods appear as “tools”, and we suggest reading Parker sideways, shifting his intellectual trajectory into directions that illuminate colonial and post-colonial issues through empirical/textual application to real South African contexts. By way of illustration, we offer a post-colonial reading of Parker’s work on post-modernism. Concluding comments on tactics for a “post-colonial analysis of discourses” are offered.
- Full Text:
- Date Issued: 2006
Teenage pregnancy and the construction of adolescence : scientific literature in South Africa
- Authors: Macleod, Catriona I
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6258 , http://hdl.handle.net/10962/d1007876 , http://journals.sagepub.com/doi/10.1177/0907568203104003
- Description: The depiction of teenage pregnancy as a social problem relies on the assumption of adolescence as a separable stage of development. Utilising a Derridian framework, I analyse how the dominant construction of adolescence as a transitional stage: (1) acts as an attempt to decide the undecidable (viz. the adolescent who is neither child nor adult, but simultaneously both) – an attempt which collapses in the face of teenage pregnancy; (2) relies on the ideal adult as the endpoint of development, and (3) has effects in terms of gendered and expert/parent/adolescent power relations.
- Full Text:
- Date Issued: 2003
- Authors: Macleod, Catriona I
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6258 , http://hdl.handle.net/10962/d1007876 , http://journals.sagepub.com/doi/10.1177/0907568203104003
- Description: The depiction of teenage pregnancy as a social problem relies on the assumption of adolescence as a separable stage of development. Utilising a Derridian framework, I analyse how the dominant construction of adolescence as a transitional stage: (1) acts as an attempt to decide the undecidable (viz. the adolescent who is neither child nor adult, but simultaneously both) – an attempt which collapses in the face of teenage pregnancy; (2) relies on the ideal adult as the endpoint of development, and (3) has effects in terms of gendered and expert/parent/adolescent power relations.
- Full Text:
- Date Issued: 2003
Composite polyester membranes with embedded dendrimer hosts and bimetallic Fe/Ni nanoparticles: synthesis, characterisation and application to water treatment
- Malinga, S P, Arotiba, O A, Mapolie, S F, Krause, Rui W M, Diallo, M S, Mamba, Bhekie B
- Authors: Malinga, S P , Arotiba, O A , Mapolie, S F , Krause, Rui W M , Diallo, M S , Mamba, Bhekie B
- Date: 1968
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123619 , vital:35465 , https://doi.org/10.1007/s11051-013-1698-y
- Description: This study describes the preparation, characterization and evaluation of new composite membranes with embedded dendrimer hosts and Fe/Ni nanoparticles. These new reactive membranes consist of films of cyclodextrin–poly(propyleneimine) dendrimers (β-CD–PPI) that are deposited onto commercial polysulfone microporous supports and crosslinked with trimesoyl chloride (TMC). The membranes were subsequently loaded with Fe/Ni nanoparticles and evaluated as separation/reactive media in aqueous solutions using 2,4,6-trichlorophenol as model pollutant. The morphology and physicochemical properties of the composite membranes were characterised using high-resolution transmission electron microscopy (HR-TEM), atomic force microscopy and measurements of contact angle, water intake, porosity and water permeability. The sorption capacity and catalytic activity of the membranes were evaluated using ion chromatography, atmospheric pressure chemical ionisation-mass spectrometry and UV–Vis spectroscopy (UV–Vis). The sizes of the embedded Fe/Ni nanoparticles in the membranes ranged from 40 to 66 nm as confirmed by HR-TEM. The reaction rates for the dechlorination of 2,4,6-trichlorophenol ranged from 0.00148 to 0.00250 min−1. In all cases, we found that the reaction by-products consisted of chloride ions and mixtures of compounds including phenol (m/z = 93), 2,4-dichlorophenol (m/z = 163) and 4-chlorophenol (m/z = 128). The overall results of this study suggest that β-CD–PPI dendrimers are promising building blocks for the synthesis of composite and reactive membranes for the efficient removal of chlorinated organic pollutants from water.
- Full Text:
- Date Issued: 1968
- Authors: Malinga, S P , Arotiba, O A , Mapolie, S F , Krause, Rui W M , Diallo, M S , Mamba, Bhekie B
- Date: 1968
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123619 , vital:35465 , https://doi.org/10.1007/s11051-013-1698-y
- Description: This study describes the preparation, characterization and evaluation of new composite membranes with embedded dendrimer hosts and Fe/Ni nanoparticles. These new reactive membranes consist of films of cyclodextrin–poly(propyleneimine) dendrimers (β-CD–PPI) that are deposited onto commercial polysulfone microporous supports and crosslinked with trimesoyl chloride (TMC). The membranes were subsequently loaded with Fe/Ni nanoparticles and evaluated as separation/reactive media in aqueous solutions using 2,4,6-trichlorophenol as model pollutant. The morphology and physicochemical properties of the composite membranes were characterised using high-resolution transmission electron microscopy (HR-TEM), atomic force microscopy and measurements of contact angle, water intake, porosity and water permeability. The sorption capacity and catalytic activity of the membranes were evaluated using ion chromatography, atmospheric pressure chemical ionisation-mass spectrometry and UV–Vis spectroscopy (UV–Vis). The sizes of the embedded Fe/Ni nanoparticles in the membranes ranged from 40 to 66 nm as confirmed by HR-TEM. The reaction rates for the dechlorination of 2,4,6-trichlorophenol ranged from 0.00148 to 0.00250 min−1. In all cases, we found that the reaction by-products consisted of chloride ions and mixtures of compounds including phenol (m/z = 93), 2,4-dichlorophenol (m/z = 163) and 4-chlorophenol (m/z = 128). The overall results of this study suggest that β-CD–PPI dendrimers are promising building blocks for the synthesis of composite and reactive membranes for the efficient removal of chlorinated organic pollutants from water.
- Full Text:
- Date Issued: 1968
The geochemical structure of the Insizwa lobe of the Mount Ayliff complex with implications for the emplacement and evolution of the complex and its Ni-sulphide potential
- Marsh, Julian S, Allen, P, Fenner, N
- Authors: Marsh, Julian S , Allen, P , Fenner, N
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150556 , vital:38984 , https://doi.org/10.2113/106.4.409
- Description: Detailed petrographic, modal and geochemical studies on a number of deep boreholes (exceeding 1.2 km in some instances) along the southeastern margin of the Insizwa lobe of the Mount Ayliff Complex reveal the existence of a geochemical stratigraphy in the mafic intrusive rocks.
- Full Text: false
- Date Issued: 2003
- Authors: Marsh, Julian S , Allen, P , Fenner, N
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150556 , vital:38984 , https://doi.org/10.2113/106.4.409
- Description: Detailed petrographic, modal and geochemical studies on a number of deep boreholes (exceeding 1.2 km in some instances) along the southeastern margin of the Insizwa lobe of the Mount Ayliff Complex reveal the existence of a geochemical stratigraphy in the mafic intrusive rocks.
- Full Text: false
- Date Issued: 2003
Tetracarboxylic acid cobalt phthalocyanine SAM on gold: Potential applications as amperometric sensor for H2O2 and fabrication of glucose biosensor
- Mashazi, Philani N, Ozoemena, Kenneth I, Nyokong, Tebello
- Authors: Mashazi, Philani N , Ozoemena, Kenneth I , Nyokong, Tebello
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6578 , http://hdl.handle.net/10962/d1004141
- Description: This report describes the applications of cobalt tetracarboxylic acid phthalocyanine (CoTCAPc) self-assembled monolayer (SAM) immobilized onto a preformed 2-mercaptoethanol (Au-ME) SAM on gold surface (Au-ME-CoTCAPc SAM) as a potential amperometric sensor for the detection of hydrogen peroxide (H[subscript 2]O[subscript 2]) at neutral pH conditions. The Au-ME-CoTCAPc SAM sensor showed a very fast amperometric response time of approximately 1 s, good linearity at the studied concentration range of up to 5 μM with a coefficient R² = 0.993 and a detection limit of 0.4 μM oxidatively. Also reductively, the sensor exhibited a very fast amperometric response time (~1 s), linearity up to 5 μM with a coefficient R² = 0.986 and a detection limit of 0.2 μM. The cobalt tetracarboxylic acid phthalocyanine self-assembled monolayer was then evaluated as a mediator for glucose oxidase (GOx)-based biosensor. The GOx (enzyme) was immobilized covalently onto Au-ME-CoTCAPc SAM using coupling agents: N-ethyl-N(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxy succinimide (NHS), and the results demonstrated a good catalytic behavior. Kinetic parameters associated with the enzymatic and mediator reactions were estimated using electrochemical versions of Lineweaver–Burk and Hanes equation, and the stability of the sensor was tested. The biosensor (Au-ME-CoTCAPc-GOx SAM) electrode showed good sensitivity (7.5 nA/mM) with a good detection limit of 8.4 μM at 3σ, smaller Michaelis–Menten constant (4.8 mM from Hanes plot) and very fast response time of approximately 5 s.
- Full Text:
- Date Issued: 2006
- Authors: Mashazi, Philani N , Ozoemena, Kenneth I , Nyokong, Tebello
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6578 , http://hdl.handle.net/10962/d1004141
- Description: This report describes the applications of cobalt tetracarboxylic acid phthalocyanine (CoTCAPc) self-assembled monolayer (SAM) immobilized onto a preformed 2-mercaptoethanol (Au-ME) SAM on gold surface (Au-ME-CoTCAPc SAM) as a potential amperometric sensor for the detection of hydrogen peroxide (H[subscript 2]O[subscript 2]) at neutral pH conditions. The Au-ME-CoTCAPc SAM sensor showed a very fast amperometric response time of approximately 1 s, good linearity at the studied concentration range of up to 5 μM with a coefficient R² = 0.993 and a detection limit of 0.4 μM oxidatively. Also reductively, the sensor exhibited a very fast amperometric response time (~1 s), linearity up to 5 μM with a coefficient R² = 0.986 and a detection limit of 0.2 μM. The cobalt tetracarboxylic acid phthalocyanine self-assembled monolayer was then evaluated as a mediator for glucose oxidase (GOx)-based biosensor. The GOx (enzyme) was immobilized covalently onto Au-ME-CoTCAPc SAM using coupling agents: N-ethyl-N(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxy succinimide (NHS), and the results demonstrated a good catalytic behavior. Kinetic parameters associated with the enzymatic and mediator reactions were estimated using electrochemical versions of Lineweaver–Burk and Hanes equation, and the stability of the sensor was tested. The biosensor (Au-ME-CoTCAPc-GOx SAM) electrode showed good sensitivity (7.5 nA/mM) with a good detection limit of 8.4 μM at 3σ, smaller Michaelis–Menten constant (4.8 mM from Hanes plot) and very fast response time of approximately 5 s.
- Full Text:
- Date Issued: 2006
Reflections on the appropriate use of unjustly conferred privilege:
- Authors: Matthews, Sally
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142714 , vital:38104 , DOI: 10.3167/th.2013.6013502
- Description: What ought beneficiaries of injustice to do with the privileges unjustly conferred upon them? This article examines how those who have been privileged as a consequence of injustice can best contribute to struggles for justice. In particular, I ask whether we ought to renounce privileges which have been unjustly conferred, or whether it may be better to use such privileges in ways that help bring about justice. The article engages in particular with feminist literature on the topic of privilege, building on arguments provided in this literature to argue that in many cases the best contribution the privileged can make to struggles for justice, is to use unjustly conferred privileges in a way that ultimately undermines the unjust systems and structures that conferred them. I tentatively outline some ways in which the privileged can develop the sensibilities which will allow them to use their privilege in this way.
- Full Text:
- Date Issued: 2013
- Authors: Matthews, Sally
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142714 , vital:38104 , DOI: 10.3167/th.2013.6013502
- Description: What ought beneficiaries of injustice to do with the privileges unjustly conferred upon them? This article examines how those who have been privileged as a consequence of injustice can best contribute to struggles for justice. In particular, I ask whether we ought to renounce privileges which have been unjustly conferred, or whether it may be better to use such privileges in ways that help bring about justice. The article engages in particular with feminist literature on the topic of privilege, building on arguments provided in this literature to argue that in many cases the best contribution the privileged can make to struggles for justice, is to use unjustly conferred privileges in a way that ultimately undermines the unjust systems and structures that conferred them. I tentatively outline some ways in which the privileged can develop the sensibilities which will allow them to use their privilege in this way.
- Full Text:
- Date Issued: 2013
Reflections on the appropriate use of unjustly conferred privilege:
- Authors: Matthews, Sally
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142314 , vital:38068 , DOI: 10.3167/th.2013.6013502
- Description: What ought beneficiaries of injustice to do with the privileges unjustly conferred upon them? This article examines how those who have been privileged as a consequence of injustice can best contribute to struggles for justice. In particular, I ask whether we ought to renounce privileges which have been unjustly conferred, or whether it may be better to use such privileges in ways that help bring about justice. The article engages in particular with feminist literature on the topic of privilege, building on arguments provided in this literature to argue that in many cases the best contribution the privileged can make to struggles for justice, is to use unjustly conferred privileges in a way that ultimately undermines the unjust systems and structures that conferred them. I tentatively outline some ways in which the privileged can develop the sensibilities which will allow them to use their privilege in this way.
- Full Text:
- Date Issued: 2013
- Authors: Matthews, Sally
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142314 , vital:38068 , DOI: 10.3167/th.2013.6013502
- Description: What ought beneficiaries of injustice to do with the privileges unjustly conferred upon them? This article examines how those who have been privileged as a consequence of injustice can best contribute to struggles for justice. In particular, I ask whether we ought to renounce privileges which have been unjustly conferred, or whether it may be better to use such privileges in ways that help bring about justice. The article engages in particular with feminist literature on the topic of privilege, building on arguments provided in this literature to argue that in many cases the best contribution the privileged can make to struggles for justice, is to use unjustly conferred privileges in a way that ultimately undermines the unjust systems and structures that conferred them. I tentatively outline some ways in which the privileged can develop the sensibilities which will allow them to use their privilege in this way.
- Full Text:
- Date Issued: 2013
Alternatives to Development in Africa:
- Authors: Matthews, Sally
- Date: 2018
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/142202 , vital:38058 , ISBN 9783319675091 , https://doi.org/10.1007/978-3-319-67510-7_7
- Description: Africa’s place in the world has been closely linked to the idea of development. Building on post-development theory’s critique of development, Matthews’ chapter asks whether and how we can move beyond development in Africa. She argues that contrary to the wishes of some post-development theorists, we cannot retrieve, discover, or create something that is purely not-development, entirely non-Western, and fully outside of coloniality. However, this does not mean that we ought to acquiesce in the face of the powerful discourses that have come to dominate the way in which we talk about Africa. The chapter tentatively explores some possible ways in which development can be both resisted and reappropriated in creative ways.
- Full Text:
- Date Issued: 2018
- Authors: Matthews, Sally
- Date: 2018
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/142202 , vital:38058 , ISBN 9783319675091 , https://doi.org/10.1007/978-3-319-67510-7_7
- Description: Africa’s place in the world has been closely linked to the idea of development. Building on post-development theory’s critique of development, Matthews’ chapter asks whether and how we can move beyond development in Africa. She argues that contrary to the wishes of some post-development theorists, we cannot retrieve, discover, or create something that is purely not-development, entirely non-Western, and fully outside of coloniality. However, this does not mean that we ought to acquiesce in the face of the powerful discourses that have come to dominate the way in which we talk about Africa. The chapter tentatively explores some possible ways in which development can be both resisted and reappropriated in creative ways.
- Full Text:
- Date Issued: 2018
MAWU and the industrial council
- Authors: MAWU, FOSATU
- Date: Feb 1993
- Subjects: FOSATU, MAWU
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/110364 , vital:33272
- Description: This is a booklet to explain why M A W U has decided to join the Industrial Council for the Iron, Steel Engineering and Metallurgical Industry. In South Africa at present there are 104 Industrial Councils. However, the one for the Iron, Steel, Engineering and Metallurgical Industries is the largest and most important covering nearly 500 000 workers. But only about 100 000 of these workers belong to trade unions. At the Industrial Council the employers and trade unions negotiate an agreement that covers all 500 000 workers. At present on the union side there are 14 trade unions - M A W U will make it 15. But most of these unions are racial unions and what are called craft unions - that is their members only do certain kinds of jobs e.g. boilermakers or electricians etc. On the employer side nearly all the 8400 factories in the industry are members of the employer association SEIFSA. It is SEIFSA - which is the largest and most powerful employer association in South Africa - that negotiates for employers on the Industrial Council.
- Full Text:
- Date Issued: Feb 1993
- Authors: MAWU, FOSATU
- Date: Feb 1993
- Subjects: FOSATU, MAWU
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/110364 , vital:33272
- Description: This is a booklet to explain why M A W U has decided to join the Industrial Council for the Iron, Steel Engineering and Metallurgical Industry. In South Africa at present there are 104 Industrial Councils. However, the one for the Iron, Steel, Engineering and Metallurgical Industries is the largest and most important covering nearly 500 000 workers. But only about 100 000 of these workers belong to trade unions. At the Industrial Council the employers and trade unions negotiate an agreement that covers all 500 000 workers. At present on the union side there are 14 trade unions - M A W U will make it 15. But most of these unions are racial unions and what are called craft unions - that is their members only do certain kinds of jobs e.g. boilermakers or electricians etc. On the employer side nearly all the 8400 factories in the industry are members of the employer association SEIFSA. It is SEIFSA - which is the largest and most powerful employer association in South Africa - that negotiates for employers on the Industrial Council.
- Full Text:
- Date Issued: Feb 1993
A win-win situation in workplace participation by means of employee share ownership scheme
- Authors: Mazibuko, Noxolo Ellen
- Subjects: Employee ownership -- South Africa , Employee stock options -- South Africa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/21877 , vital:29797
- Description: This paper outlines the concept of Employee Share Ownership Participation Schemes known as ESOPs. An ESOP is not a simple concept and briefly entails that through ESOPs shares are made available to all employees who wish to participate in company decision-making and the company helps them to obtain the shares. South African share schemes are linked to economic empowerment. Some researchers emphasize that ESOPs in particular, hold the promise that employees will develop a sense of loyalty to their company because their material interest will coincide with those of the company (Maller, 1987; and Ottinger, 2008).
- Full Text: false
- Authors: Mazibuko, Noxolo Ellen
- Subjects: Employee ownership -- South Africa , Employee stock options -- South Africa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/21877 , vital:29797
- Description: This paper outlines the concept of Employee Share Ownership Participation Schemes known as ESOPs. An ESOP is not a simple concept and briefly entails that through ESOPs shares are made available to all employees who wish to participate in company decision-making and the company helps them to obtain the shares. South African share schemes are linked to economic empowerment. Some researchers emphasize that ESOPs in particular, hold the promise that employees will develop a sense of loyalty to their company because their material interest will coincide with those of the company (Maller, 1987; and Ottinger, 2008).
- Full Text: false