Building and Woodworkers International (BWI) Baseline gender survey
- Authors: Benjamin, Nina
- Date: 2008
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/60109 , vital:27737
- Description: This Gender Survey is about exploring both the nature of as well as the shifts in the gender relations between men women in the construction sector. The report is defining gender relations as the power relations between men and women. In the context of the construction sector, workers and particularly semi and unskilled workers generally have appalling working conditions. These conditions affect both men and women workers but the vast majority of women workers find themselves right at the bottom of a hierarchy that is shaped by class, race and gender. Large multinational construction companies are still owned and controlled by rich white men while black women, youth and the disabled find themselves right at the bottom of the hierarchy.
- Full Text:
- Date Issued: 2008
- Authors: Benjamin, Nina
- Date: 2008
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/60109 , vital:27737
- Description: This Gender Survey is about exploring both the nature of as well as the shifts in the gender relations between men women in the construction sector. The report is defining gender relations as the power relations between men and women. In the context of the construction sector, workers and particularly semi and unskilled workers generally have appalling working conditions. These conditions affect both men and women workers but the vast majority of women workers find themselves right at the bottom of a hierarchy that is shaped by class, race and gender. Large multinational construction companies are still owned and controlled by rich white men while black women, youth and the disabled find themselves right at the bottom of the hierarchy.
- Full Text:
- Date Issued: 2008
New Unity Movement Bulletin
- Date: 2007-10
- Subjects: Government, Resistance to -- South Africa , South Africa -- History -- 20th century , South Africa -- Politics and government
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10948/32259 , vital:31995 , Bulk File 7
- Description: The Bulletin was the official newsletter of the New Unity Movement. It was published about twice a year and contained articles reflecting the organisation's views on resistance to the Apartheid government.
- Full Text: false
- Date Issued: 2007-10
- Date: 2007-10
- Subjects: Government, Resistance to -- South Africa , South Africa -- History -- 20th century , South Africa -- Politics and government
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10948/32259 , vital:31995 , Bulk File 7
- Description: The Bulletin was the official newsletter of the New Unity Movement. It was published about twice a year and contained articles reflecting the organisation's views on resistance to the Apartheid government.
- Full Text: false
- Date Issued: 2007-10
Comparison of structural damage caused by Russian wheat aphid (Diuraphis noxia Mordvilko) and Bird cherry-oat aphid (Rhopalosiphum padi L.) in a susceptible barley cultivar, Hordeum vulgare L. cv Clipper
- Saheed, Sefiu Adekilekun, Botha, Christiaan Edward Johannes, Liu, Lin, Jonsson, Lisbeth
- Authors: Saheed, Sefiu Adekilekun , Botha, Christiaan Edward Johannes , Liu, Lin , Jonsson, Lisbeth
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6540 , http://hdl.handle.net/10962/d1005981
- Description: The Russian wheat aphid (RWA, (Diuraphis noxia Mordvilko) and the Bird cherry-oat aphid (BCA, (Rhopalosiphum padi L.) cause severe damage to grain crops, including barley. An investigation of the effects of these aphids on a susceptible cultivar revealed that BCA-infested barley plants remained healthy-looking for two weeks after feeding commenced. In contrast, signs of stress and damage, including chlorosis and leaf necrosis were evident in RWA infested plants. Our study suggests that damage to the vascular tissue due to sustained feeding by BCA, was not as extensive as that caused by RWA. In addition, there is a marked difference in the salivary secretion pattern within xylem elements punctured by aphids tapping the xylem for water. RWA deposit electron-dense, amorphous to smooth saliva, which completely encases the inner walls of affected elements, and saliva encases pit membranes between xylem elements, and between xylem vessels and xylem parenchyma. Xylem tapped by BCA, contained more granular saliva, which apparently does not occlude vessel wall apertures or the pit membranes to the same extent as was observed with RWA. Damage to phloem tissue, including phloem parenchyma elements, sieve tube-companion cell (CC-ST) complexes as well as thick-walled sieve tubes, was extensive. Plasmodesmata between phloem parenchyma elements as well as pore-plasmodesmata between the CC-ST were occluded by callose. We conclude that severe, perhaps permanent damage to conducting elements in RWA infested leaves may be responsible for the detrimental chlorosis and necrosis symptoms. These symptoms are absent in BCA-infested plants.
- Full Text:
- Date Issued: 2007
- Authors: Saheed, Sefiu Adekilekun , Botha, Christiaan Edward Johannes , Liu, Lin , Jonsson, Lisbeth
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6540 , http://hdl.handle.net/10962/d1005981
- Description: The Russian wheat aphid (RWA, (Diuraphis noxia Mordvilko) and the Bird cherry-oat aphid (BCA, (Rhopalosiphum padi L.) cause severe damage to grain crops, including barley. An investigation of the effects of these aphids on a susceptible cultivar revealed that BCA-infested barley plants remained healthy-looking for two weeks after feeding commenced. In contrast, signs of stress and damage, including chlorosis and leaf necrosis were evident in RWA infested plants. Our study suggests that damage to the vascular tissue due to sustained feeding by BCA, was not as extensive as that caused by RWA. In addition, there is a marked difference in the salivary secretion pattern within xylem elements punctured by aphids tapping the xylem for water. RWA deposit electron-dense, amorphous to smooth saliva, which completely encases the inner walls of affected elements, and saliva encases pit membranes between xylem elements, and between xylem vessels and xylem parenchyma. Xylem tapped by BCA, contained more granular saliva, which apparently does not occlude vessel wall apertures or the pit membranes to the same extent as was observed with RWA. Damage to phloem tissue, including phloem parenchyma elements, sieve tube-companion cell (CC-ST) complexes as well as thick-walled sieve tubes, was extensive. Plasmodesmata between phloem parenchyma elements as well as pore-plasmodesmata between the CC-ST were occluded by callose. We conclude that severe, perhaps permanent damage to conducting elements in RWA infested leaves may be responsible for the detrimental chlorosis and necrosis symptoms. These symptoms are absent in BCA-infested plants.
- Full Text:
- Date Issued: 2007
Patterns and processes underlying evolutionary significant units in the Platypleura stridula L. species complex (Hemiptera: Cicadidae) in the Cape Floristic Region, South Africa
- Price, Benjamin W, Barker, Nigel P, Villet, Martin H
- Authors: Price, Benjamin W , Barker, Nigel P , Villet, Martin H
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6964 , http://hdl.handle.net/10962/d1012027
- Description: Cicadas have been shown to be useful organisms for examining the effects of distribution, plant association and geographical barriers on gene flow between populations. The cicadas of the Platypleura stridula species complex are restricted to the biologically diverse Cape Floristic Region (CFR) of South Africa. They are thus an excellent study group for elucidating the mechanisms by which hemipteran diversity is generated and maintained in the CFR. Phylogeographical analysis of this species complex using mitochondrial DNA Cytochrome Oxidase I (COI) and ribosomal 16S sequence data, coupled with preliminary morphological and acoustic data, resolves six clades, each of which has specific host-plant associations and distinct geographical ranges. The phylogeographical structure implies simultaneous or near-simultaneous radiation events, coupled with shifts in host-plant associations. When calibrated using published COI and 16S substitution rates typical for related insects, these lineages date back to the late Pliocene - early Pleistocene, coincident with vegetation change, altered drainage patterns and accelerated erosion in response to neotectonic crustal uplift and cyclic Pleistocene climate change, and glaciation-associated changes in climate and sea level.
- Full Text:
- Date Issued: 2007
- Authors: Price, Benjamin W , Barker, Nigel P , Villet, Martin H
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6964 , http://hdl.handle.net/10962/d1012027
- Description: Cicadas have been shown to be useful organisms for examining the effects of distribution, plant association and geographical barriers on gene flow between populations. The cicadas of the Platypleura stridula species complex are restricted to the biologically diverse Cape Floristic Region (CFR) of South Africa. They are thus an excellent study group for elucidating the mechanisms by which hemipteran diversity is generated and maintained in the CFR. Phylogeographical analysis of this species complex using mitochondrial DNA Cytochrome Oxidase I (COI) and ribosomal 16S sequence data, coupled with preliminary morphological and acoustic data, resolves six clades, each of which has specific host-plant associations and distinct geographical ranges. The phylogeographical structure implies simultaneous or near-simultaneous radiation events, coupled with shifts in host-plant associations. When calibrated using published COI and 16S substitution rates typical for related insects, these lineages date back to the late Pliocene - early Pleistocene, coincident with vegetation change, altered drainage patterns and accelerated erosion in response to neotectonic crustal uplift and cyclic Pleistocene climate change, and glaciation-associated changes in climate and sea level.
- Full Text:
- Date Issued: 2007
Re-examining ‘professionalism’ in pharmacy: a South African perspective
- Authors: Williams, K F
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6084 , http://hdl.handle.net/10962/d1008481 , http://dx.doi.org/10.1016/j.socscimed.2006.11.001
- Description: Although defining itself as a patient-centred profession, private sector (community and private hospital) pharmacy often appears to be that of a product-for-profit centred occupation. This perception has been at the core of the medical profession's attempts to reduce the professional autonomy of pharmacy, and has appeared at the forefront of the South African Department of Health's positioning of private sector pharmacy. Using as a starting point the debate surrounding attempts by the South African Minister of Health to regulate the price of medicines, I propose that the present negative positioning of private sector pharmacy in South Africa could be ameliorated by pharmacy practice that evidences a redefined understanding of professionalism.
- Full Text:
- Date Issued: 2007
- Authors: Williams, K F
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6084 , http://hdl.handle.net/10962/d1008481 , http://dx.doi.org/10.1016/j.socscimed.2006.11.001
- Description: Although defining itself as a patient-centred profession, private sector (community and private hospital) pharmacy often appears to be that of a product-for-profit centred occupation. This perception has been at the core of the medical profession's attempts to reduce the professional autonomy of pharmacy, and has appeared at the forefront of the South African Department of Health's positioning of private sector pharmacy. Using as a starting point the debate surrounding attempts by the South African Minister of Health to regulate the price of medicines, I propose that the present negative positioning of private sector pharmacy in South Africa could be ameliorated by pharmacy practice that evidences a redefined understanding of professionalism.
- Full Text:
- Date Issued: 2007
Restructuring implicational meaning through memory-based imagery: some historical notes
- Authors: Edwards, David J A
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6239 , http://hdl.handle.net/10962/d1007851
- Description: This paper provides a historical perspective on the recent increase in the clinical application of imagery techniques to restructure systems of implicational meaning that drive emotional distress or self-defeating behaviors. Janet's early application of such techniques was largely ignored except by a few hypnotherapists. Current applications in cognitive therapy were adapted and extended in the early 1980s from Perls’ Gestalt therapy methods. Some precursors to Perls are examined, as well as the work of some of those who developed and formulated the integration of his techniques into Beck's cognitive therapy. It is argued that this process amounted to a significant paradigm shift.
- Full Text:
- Date Issued: 2007
- Authors: Edwards, David J A
- Date: 2007
- Language: English
- Type: Article
- Identifier: vital:6239 , http://hdl.handle.net/10962/d1007851
- Description: This paper provides a historical perspective on the recent increase in the clinical application of imagery techniques to restructure systems of implicational meaning that drive emotional distress or self-defeating behaviors. Janet's early application of such techniques was largely ignored except by a few hypnotherapists. Current applications in cognitive therapy were adapted and extended in the early 1980s from Perls’ Gestalt therapy methods. Some precursors to Perls are examined, as well as the work of some of those who developed and formulated the integration of his techniques into Beck's cognitive therapy. It is argued that this process amounted to a significant paradigm shift.
- Full Text:
- Date Issued: 2007
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
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
WET-Roadmap:
- Dada, Rehana, Kotze, Donovan C, Ellery, William F N, Uys, Mary, Breen, Charles, Dini, John, Mitchell, Steve
- Authors: Dada, Rehana , Kotze, Donovan C , Ellery, William F N , Uys, Mary , Breen, Charles , Dini, John , Mitchell, Steve
- Date: 2007
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/176596 , vital:40093 , ISBN 978-1-77005-632-9 , http://www.wrc.org.za/wp-content/uploads/mdocs/TT 321-07.pdf
- Description: The WET-Management Series is a set of integrated tools that can be used to guide well-informed and effective wetland management and rehabilitation. Wetland loss in South Africa has been significant and the need for wetland rehabilitation as part of good wetland stewardship and management is compelling. National policy and legislation provide clear direction and support for rehabilitation, but the very complex links between people and wetlands mean that actions aimed at sustainably rehabilitating and conserving wetlands will depend on the dedication and commitment of all stakeholders, especially landowners and wetland users.
- Full Text:
- Date Issued: 2007
- Authors: Dada, Rehana , Kotze, Donovan C , Ellery, William F N , Uys, Mary , Breen, Charles , Dini, John , Mitchell, Steve
- Date: 2007
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/176596 , vital:40093 , ISBN 978-1-77005-632-9 , http://www.wrc.org.za/wp-content/uploads/mdocs/TT 321-07.pdf
- Description: The WET-Management Series is a set of integrated tools that can be used to guide well-informed and effective wetland management and rehabilitation. Wetland loss in South Africa has been significant and the need for wetland rehabilitation as part of good wetland stewardship and management is compelling. National policy and legislation provide clear direction and support for rehabilitation, but the very complex links between people and wetlands mean that actions aimed at sustainably rehabilitating and conserving wetlands will depend on the dedication and commitment of all stakeholders, especially landowners and wetland users.
- Full Text:
- Date Issued: 2007
New Unity Movement Bulletin
- Date: 2006-04
- Subjects: Government, Resistance to -- South Africa , South Africa -- History -- 20th century , South Africa -- Politics and government
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10948/31716 , vital:31739 , Bulk File 7
- Description: The Bulletin was the official newsletter of the New Unity Movement. It was published about twice a year and contained articles reflecting the organisation's views on resistance to the Apartheid government.
- Full Text: false
- Date Issued: 2006-04
- Date: 2006-04
- Subjects: Government, Resistance to -- South Africa , South Africa -- History -- 20th century , South Africa -- Politics and government
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10948/31716 , vital:31739 , Bulk File 7
- Description: The Bulletin was the official newsletter of the New Unity Movement. It was published about twice a year and contained articles reflecting the organisation's views on resistance to the Apartheid government.
- Full Text: false
- Date Issued: 2006-04
Of no account?: South Africa's electoral system (non) debate
- Authors: Vincent, Louise
- Date: 2006
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141657 , vital:37994 , DOI: 10.1080/02589000500513796
- Description: Accountability can be summarised simply as ‘answerability’ (James and Hadland 2002:1) and is a vital cornerstone of representative democracy. Without accountability, an electorate, once having put into power a particular representative, has no recourse to explanations, justifications or reviews of how that person has performed and whether or not they have fulfilled the promises which secured their election in the first place. In a representative democracy mechanisms of accountability are necessarily multiple and must include both formal and informal dimensions. The electoral system is but one of these. Other key lynchpins in the accountability engine include the role of opposition parties, the committee system, the media, civil society, the courts, and what in South Africa are referred to, on the basis of the 1996 Constitution, as the ‘Chapter Nine Institutions’: the Public Protector, Human Rights Commission, Commission for the Promotion and Protection of the Rights of Cultural, Religious and Linguistic Communities, Commission for Gender Equality, Auditor-General, and the Electoral Commission.
- Full Text:
- Date Issued: 2006
- Authors: Vincent, Louise
- Date: 2006
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141657 , vital:37994 , DOI: 10.1080/02589000500513796
- Description: Accountability can be summarised simply as ‘answerability’ (James and Hadland 2002:1) and is a vital cornerstone of representative democracy. Without accountability, an electorate, once having put into power a particular representative, has no recourse to explanations, justifications or reviews of how that person has performed and whether or not they have fulfilled the promises which secured their election in the first place. In a representative democracy mechanisms of accountability are necessarily multiple and must include both formal and informal dimensions. The electoral system is but one of these. Other key lynchpins in the accountability engine include the role of opposition parties, the committee system, the media, civil society, the courts, and what in South Africa are referred to, on the basis of the 1996 Constitution, as the ‘Chapter Nine Institutions’: the Public Protector, Human Rights Commission, Commission for the Promotion and Protection of the Rights of Cultural, Religious and Linguistic Communities, Commission for Gender Equality, Auditor-General, and the Electoral Commission.
- Full Text:
- Date Issued: 2006
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
Spatio-temporal patterns in maturation of the chokka squid (Loligo vulgaris reynaudii) off the coast of South Africa
- Olyott, L J H, Sauer, Warwick H H, Booth, Anthony J
- Authors: Olyott, L J H , Sauer, Warwick H H , Booth, Anthony J
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6763 , http://hdl.handle.net/10962/d1007930
- Description: Knowledge of the temporal and spatial characteristics of chokka squid (Loligo vulgaris reynaudii) biology in South African waters is limited, so the possibility of there being a geographically fragmented stock was examined by investigating the distribution of maturity patterns for the species, covering all known spawning areas and using both historical and recent data. Gonadosomatic indices (GSI) varied between year-round consistency and apparent seasonal peaks in both summer and winter; there was no clear spatial pattern. Monthly percentage maturity provided further evidence for two peak reproductive periods each year, although mature squid were present throughout. Sex ratios demonstrated great variability between different areas and life history stages. Male-biased sex ratios were only apparent on the inshore spawning grounds and ranged between 1.118:1 and 4.267:1. Size at sexual maturity was also seasonal, squid maturing smaller in winter/spring than in summer/autumn. Also, squid in the east matured smaller than squid in the west. Although the results from the present study do not provide conclusive evidence of distinct geographic populations, squid likely spawn over a significantly larger area of the Agulhas Bank than previously estimated, and squid on the west coast of South Africa may return to spawn on the western portion of the Agulhas Bank. It remains likely, however, that the east and west coast populations are a single stock and that migration of juveniles to the west coast and their subsequent return as sub-adults is an integral but non-essential and variable part of the life history.
- Full Text:
- Date Issued: 2006
- Authors: Olyott, L J H , Sauer, Warwick H H , Booth, Anthony J
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6763 , http://hdl.handle.net/10962/d1007930
- Description: Knowledge of the temporal and spatial characteristics of chokka squid (Loligo vulgaris reynaudii) biology in South African waters is limited, so the possibility of there being a geographically fragmented stock was examined by investigating the distribution of maturity patterns for the species, covering all known spawning areas and using both historical and recent data. Gonadosomatic indices (GSI) varied between year-round consistency and apparent seasonal peaks in both summer and winter; there was no clear spatial pattern. Monthly percentage maturity provided further evidence for two peak reproductive periods each year, although mature squid were present throughout. Sex ratios demonstrated great variability between different areas and life history stages. Male-biased sex ratios were only apparent on the inshore spawning grounds and ranged between 1.118:1 and 4.267:1. Size at sexual maturity was also seasonal, squid maturing smaller in winter/spring than in summer/autumn. Also, squid in the east matured smaller than squid in the west. Although the results from the present study do not provide conclusive evidence of distinct geographic populations, squid likely spawn over a significantly larger area of the Agulhas Bank than previously estimated, and squid on the west coast of South Africa may return to spawn on the western portion of the Agulhas Bank. It remains likely, however, that the east and west coast populations are a single stock and that migration of juveniles to the west coast and their subsequent return as sub-adults is an integral but non-essential and variable part of the life history.
- Full Text:
- Date Issued: 2006
Synthesis and electrochemical characterisation of benzylmercapto and dodecylmercapto tetra substituted cobalt, iron, and zinc phthalocyanines complexes
- Nyokong, Tebello, Ozoemena, Kenneth I, Agboola, Bolade O
- Authors: Nyokong, Tebello , Ozoemena, Kenneth I , Agboola, Bolade O
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6580 , http://hdl.handle.net/10962/d1004143
- Description: The work reports on cyclic voltammetry (CV), square wave voltammetry and spectroelectrochemistry of the following complexes: tetrakis (benzyl mercapto) phthalocyanine complexes of Zn(II) (ZnTBMPc, 4a ), Co(II) (CoTBMPc, 5a ), Fe(II) (FeTBMPc 6a ); and tetrakis (dodecylmercapto) phthalocyanine complexes of Zn(II) (ZnTDMPc, 4b), Co(II) (CoTDMPc, 5b) and Fe(II) (FeTDMPc, 6b). More reversible CV couples were observed for complexes 4a, 5a and 6a containing thiol phenyl ring substituents. Complexes 4b, 5b and 6b containing long chain thiol substituents showed less reversible couples. Complexes 6a and 6b showed a relatively large number of redox processes (5 for 6a and 6 for 6b) within the potential window employed in this work. The processes for FePc derivatives (6a) are assigned to FeIIIPc-1/FeIIIPc-2, FeIIIPc-2/FeIIPc-2, FeIIPc-2/FeIPc-2, FeIPc-2/FeIPc-3 and FeIPc-3/FeIPc-4 and for the CoPc derivative (5a) to CoIIIPc-1/CoIIIPc-2, CoIIIPc-2/CoIIPc-2, CoIIPc-2/CoIPc-2 and CoIPc-2/CoIPc-3.
- Full Text:
- Date Issued: 2006
- Authors: Nyokong, Tebello , Ozoemena, Kenneth I , Agboola, Bolade O
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6580 , http://hdl.handle.net/10962/d1004143
- Description: The work reports on cyclic voltammetry (CV), square wave voltammetry and spectroelectrochemistry of the following complexes: tetrakis (benzyl mercapto) phthalocyanine complexes of Zn(II) (ZnTBMPc, 4a ), Co(II) (CoTBMPc, 5a ), Fe(II) (FeTBMPc 6a ); and tetrakis (dodecylmercapto) phthalocyanine complexes of Zn(II) (ZnTDMPc, 4b), Co(II) (CoTDMPc, 5b) and Fe(II) (FeTDMPc, 6b). More reversible CV couples were observed for complexes 4a, 5a and 6a containing thiol phenyl ring substituents. Complexes 4b, 5b and 6b containing long chain thiol substituents showed less reversible couples. Complexes 6a and 6b showed a relatively large number of redox processes (5 for 6a and 6 for 6b) within the potential window employed in this work. The processes for FePc derivatives (6a) are assigned to FeIIIPc-1/FeIIIPc-2, FeIIIPc-2/FeIIPc-2, FeIIPc-2/FeIPc-2, FeIPc-2/FeIPc-3 and FeIPc-3/FeIPc-4 and for the CoPc derivative (5a) to CoIIIPc-1/CoIIIPc-2, CoIIIPc-2/CoIIPc-2, CoIIPc-2/CoIPc-2 and CoIPc-2/CoIPc-3.
- Full Text:
- Date Issued: 2006
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
The geology and geochemistry of the Palaeoproterozoic Makganyene diamictite
- Polteau, S, Moore, John M, Tsikos, Harilaos
- Authors: Polteau, S , Moore, John M , Tsikos, Harilaos
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6740 , http://hdl.handle.net/10962/d1007556
- Description: The Palaeoproterozoic Earth experienced a global glacial event at 2400 Ma that occurred during the transitional period from anoxic to aerobic conditions in the atmosphere and oceans. The Transvaal Supergroup in the Griqualand West Basin, South Africa, hosts glacial deposits and associated major iron and manganese deposits that are apparently related to these global changes. The focus of this study is to assess the stratigraphy and geochemistry of the glaciogenic Makganyene Formation, in order to constrain its palaeoenvironmental settings. The Makganyene Formation forms the base of the Postmasburg Group and has been regarded as resting on an erosive regional unconformity throughout the Northern Cape Province. Systematic regional field observations and regional mapping carried out during this study demonstrate that this stratigraphic relationship is not universal. The Makganyene Formation is, in fact, conformable with underlying formations of the Koegas Subgroup in the deep southern Prieska basin and rests on an unconformity only on the shallow Ghaap platform to the north-east. The Makganyene Formation displays lateral facies changes that reflect the palaeogeography of the study area, and the advance and retreat of ice sheets/shelves. Geochemical investigations of glacial strata of the Makganyene Formation demonstrate that underlying banded iron formations of the Transvaal Supergroup acted as the main clastic source for the diamictite detritus. Geographic variations in bulk composition of the diamictites correlate well with field observations, and show that sorting processes were controlled largely by the morphology of the palaeobasin. Carbon isotope results emphasize the transitional nature of the Makganyene Formation in terms of the environmental conditions that resulted in widespread global glaciation in the Palaeoproterozoic. On the basis of the above geological evidence, it is proposed that the Transvaal Supergroup in the Northern Cape Province represents a continuous depositional event that lasted approximately 250 Ma and hence provides a unique opportunity for assessing the transitional changes experienced by the Palaeoproterozoic Earth.
- Full Text:
- Date Issued: 2006
- Authors: Polteau, S , Moore, John M , Tsikos, Harilaos
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6740 , http://hdl.handle.net/10962/d1007556
- Description: The Palaeoproterozoic Earth experienced a global glacial event at 2400 Ma that occurred during the transitional period from anoxic to aerobic conditions in the atmosphere and oceans. The Transvaal Supergroup in the Griqualand West Basin, South Africa, hosts glacial deposits and associated major iron and manganese deposits that are apparently related to these global changes. The focus of this study is to assess the stratigraphy and geochemistry of the glaciogenic Makganyene Formation, in order to constrain its palaeoenvironmental settings. The Makganyene Formation forms the base of the Postmasburg Group and has been regarded as resting on an erosive regional unconformity throughout the Northern Cape Province. Systematic regional field observations and regional mapping carried out during this study demonstrate that this stratigraphic relationship is not universal. The Makganyene Formation is, in fact, conformable with underlying formations of the Koegas Subgroup in the deep southern Prieska basin and rests on an unconformity only on the shallow Ghaap platform to the north-east. The Makganyene Formation displays lateral facies changes that reflect the palaeogeography of the study area, and the advance and retreat of ice sheets/shelves. Geochemical investigations of glacial strata of the Makganyene Formation demonstrate that underlying banded iron formations of the Transvaal Supergroup acted as the main clastic source for the diamictite detritus. Geographic variations in bulk composition of the diamictites correlate well with field observations, and show that sorting processes were controlled largely by the morphology of the palaeobasin. Carbon isotope results emphasize the transitional nature of the Makganyene Formation in terms of the environmental conditions that resulted in widespread global glaciation in the Palaeoproterozoic. On the basis of the above geological evidence, it is proposed that the Transvaal Supergroup in the Northern Cape Province represents a continuous depositional event that lasted approximately 250 Ma and hence provides a unique opportunity for assessing the transitional changes experienced by the Palaeoproterozoic Earth.
- Full Text:
- Date Issued: 2006
New Unity Movement Bulletin
- Date: 2005-05
- Subjects: Government, Resistance to -- South Africa , South Africa -- History -- 20th century , South Africa -- Politics and government
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10948/31756 , vital:31743 , Bulk File 7
- Description: The Bulletin was the official newsletter of the New Unity Movement. It was published about twice a year and contained articles reflecting the organisation's views on resistance to the Apartheid government.
- Full Text: false
- Date Issued: 2005-05
- Date: 2005-05
- Subjects: Government, Resistance to -- South Africa , South Africa -- History -- 20th century , South Africa -- Politics and government
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10948/31756 , vital:31743 , Bulk File 7
- Description: The Bulletin was the official newsletter of the New Unity Movement. It was published about twice a year and contained articles reflecting the organisation's views on resistance to the Apartheid government.
- Full Text: false
- Date Issued: 2005-05
Art for the masses? Justification for the public support of the arts in developing countries – two arts festivals in South Africa
- Authors: Snowball, Jeanette D
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6077 , http://hdl.handle.net/10962/d1006127 , http://dx.doi.org/10.1007/s10824-005-5064-5
- Description: In the New South Africa, as in other developing countries, the equitable distribution of public resources is a priority. The case for public support of the arts is thus difficult to make because it has been shown and borne out by South African research, that arts audiences tend to represent the better educated, more prosperous minority of society, not the majority of the very poor, mainly African-origin population. Using data from willingness to pay studies conducted at two South African arts festivals, this paper shows that, when the positive externalities provided by the arts are included in their valuation, it can be shown that both high and low income earners benefit. However, as suggested by Seaman (2003), it is also found that some of what the WTP figure is capturing is current and expected future economic benefit from the event.
- Full Text:
- Date Issued: 2005
- Authors: Snowball, Jeanette D
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6077 , http://hdl.handle.net/10962/d1006127 , http://dx.doi.org/10.1007/s10824-005-5064-5
- Description: In the New South Africa, as in other developing countries, the equitable distribution of public resources is a priority. The case for public support of the arts is thus difficult to make because it has been shown and borne out by South African research, that arts audiences tend to represent the better educated, more prosperous minority of society, not the majority of the very poor, mainly African-origin population. Using data from willingness to pay studies conducted at two South African arts festivals, this paper shows that, when the positive externalities provided by the arts are included in their valuation, it can be shown that both high and low income earners benefit. However, as suggested by Seaman (2003), it is also found that some of what the WTP figure is capturing is current and expected future economic benefit from the event.
- Full Text:
- Date Issued: 2005
Unconscious influences on discourses about consciousness : ideology, state-specific science and unformulated experience
- Authors: Edwards, David J A
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6226 , http://hdl.handle.net/10962/d1007776
- Description: Discussions about consciousness are complicated by the fact that participants do not share a common underlying “ordinary” consciousness. Everyday experience is founded on what Teasdale calls implicational cognition, much of which is not verbally formulated. An unacknowledged aspect of debate is individuals’ attempts to negotiate the expression of their unformulated experience. This is further complicated by the way in which a discourse, based on particular ontological assumptions, exercises an ideological control which limits what underlying aspects of experience can be formulated at all. Tart’s concept of state specific sciences provides a framework within which the role of unformulated experience can be acknowledged and taken into account. Unless this is done, debates will be vitiated by participants engaging in ideological struggles and talking at cross-purposes.
- Full Text:
- Date Issued: 2005
- Authors: Edwards, David J A
- Date: 2005
- Language: English
- Type: Article
- Identifier: vital:6226 , http://hdl.handle.net/10962/d1007776
- Description: Discussions about consciousness are complicated by the fact that participants do not share a common underlying “ordinary” consciousness. Everyday experience is founded on what Teasdale calls implicational cognition, much of which is not verbally formulated. An unacknowledged aspect of debate is individuals’ attempts to negotiate the expression of their unformulated experience. This is further complicated by the way in which a discourse, based on particular ontological assumptions, exercises an ideological control which limits what underlying aspects of experience can be formulated at all. Tart’s concept of state specific sciences provides a framework within which the role of unformulated experience can be acknowledged and taken into account. Unless this is done, debates will be vitiated by participants engaging in ideological struggles and talking at cross-purposes.
- Full Text:
- Date Issued: 2005
Pre-emigration reflections : Afrikaans speakers moving to New Zealand
- De Klerk, Vivian A, Barkhuizen, Gary
- Authors: De Klerk, Vivian A , Barkhuizen, Gary
- Date: 2004
- Language: English
- Type: Article , text
- Identifier: vital:6138 , http://hdl.handle.net/10962/d1011590
- Description: This article reports on the pre-emigration reflections of 15 Afrikaans speakers, all of whom were in the final stages of preparing to emigrate to New Zealand. The study explores the linguistic histories of the participants, their attitudes to their mother tongue (Afrikaans) and to English, and their views on South Africa's language policy and how it has influenced their decisions to leave the country. The paper also offers a view on possible long-term linguistic outcomes for these families.
- Full Text:
- Date Issued: 2004
- Authors: De Klerk, Vivian A , Barkhuizen, Gary
- Date: 2004
- Language: English
- Type: Article , text
- Identifier: vital:6138 , http://hdl.handle.net/10962/d1011590
- Description: This article reports on the pre-emigration reflections of 15 Afrikaans speakers, all of whom were in the final stages of preparing to emigrate to New Zealand. The study explores the linguistic histories of the participants, their attitudes to their mother tongue (Afrikaans) and to English, and their views on South Africa's language policy and how it has influenced their decisions to leave the country. The paper also offers a view on possible long-term linguistic outcomes for these families.
- Full Text:
- Date Issued: 2004