Effect of the killing method on post-mortem change in length of larvae of Thanatophilus micans (Fabricius, 1794) (Coleoptera: Silphidae) stored in 70% ethanol
- Midgley, John M, Villet, Martin H
- Authors: Midgley, John M , Villet, Martin H
- Date: 2009
- Language: English
- Type: text , Article
- Identifier: vital:6857 , http://hdl.handle.net/10962/d1011140
- Description: It is recommended that insect larvae collected for forensic purposes should be killed using the same method as was used to create existing models for rate of development. Certain killing methods have been shown to be preferable because they cause less distortion of the specimens, but these are not always practicable in a particular case, and so a method of correcting for effect of killing method is required. Larvae of all instars of Thanatophilus micans (Fabricius 1794) (Coleoptera: Silphidae) were measured and then killed by immersion in ethanol, immersion in hot water or freezing. Samples were re-measured immediately after death, then stored in excess 70% ethanol and re-measured after 1 week and again after 4 weeks. The change in length was significantly different from zero in all samples (t = -9.07022, p < 0.001). An analysis of covariance showed that instar, killing method and storage time all had a significant effect on the change in length. The results showed that T. micans larvae have a great potential for change in length during storage but that the change is not predictable, as the magnitude and sign of the change are variable.
- Full Text:
- Date Issued: 2009
- Authors: Midgley, John M , Villet, Martin H
- Date: 2009
- Language: English
- Type: text , Article
- Identifier: vital:6857 , http://hdl.handle.net/10962/d1011140
- Description: It is recommended that insect larvae collected for forensic purposes should be killed using the same method as was used to create existing models for rate of development. Certain killing methods have been shown to be preferable because they cause less distortion of the specimens, but these are not always practicable in a particular case, and so a method of correcting for effect of killing method is required. Larvae of all instars of Thanatophilus micans (Fabricius 1794) (Coleoptera: Silphidae) were measured and then killed by immersion in ethanol, immersion in hot water or freezing. Samples were re-measured immediately after death, then stored in excess 70% ethanol and re-measured after 1 week and again after 4 weeks. The change in length was significantly different from zero in all samples (t = -9.07022, p < 0.001). An analysis of covariance showed that instar, killing method and storage time all had a significant effect on the change in length. The results showed that T. micans larvae have a great potential for change in length during storage but that the change is not predictable, as the magnitude and sign of the change are variable.
- Full Text:
- Date Issued: 2009
Consistencies far beyond chance: an analysis of learner preconceptions of reflective symmetry
- Mhlolo, Michael K, Schäfer, Marc
- Authors: Mhlolo, Michael K , Schäfer, Marc
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141139 , vital:37947 , DOI: 10.15700/saje.v33n2a686
- Description: This article reports on regularities observed in learners’ preconceptions of reflective symmetry. Literature suggests that the very existence of such regularities indicates a gap between what learners know and what they need to know. Such a gap inhibits further understanding and application, and hence needed to be investigated. A total of 235 Grade 11 learners, from 13 high schools that participate in the First Rand Foundation-funded Mathematics Education project in the Eastern Cape, responded to a task on reflective symmetry. Our framework for analysing the responses was based on the taxonomy of structure of the observed learning outcome. The results indicated that 85% of learner responses reflect a motion understanding of reflections, where learners considered geometric figures as physical motions on top of the plane. While this understanding is useful in some cases, it is not an essential aspect of mapping understanding, which is critical for application in function notations and other analytical geometry contexts. We suggest that if this gap is to be closed, learners need to construct these reflections physically so that they may think of reflections beyond motion.
- Full Text:
- Date Issued: 2013
- Authors: Mhlolo, Michael K , Schäfer, Marc
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/141139 , vital:37947 , DOI: 10.15700/saje.v33n2a686
- Description: This article reports on regularities observed in learners’ preconceptions of reflective symmetry. Literature suggests that the very existence of such regularities indicates a gap between what learners know and what they need to know. Such a gap inhibits further understanding and application, and hence needed to be investigated. A total of 235 Grade 11 learners, from 13 high schools that participate in the First Rand Foundation-funded Mathematics Education project in the Eastern Cape, responded to a task on reflective symmetry. Our framework for analysing the responses was based on the taxonomy of structure of the observed learning outcome. The results indicated that 85% of learner responses reflect a motion understanding of reflections, where learners considered geometric figures as physical motions on top of the plane. While this understanding is useful in some cases, it is not an essential aspect of mapping understanding, which is critical for application in function notations and other analytical geometry contexts. We suggest that if this gap is to be closed, learners need to construct these reflections physically so that they may think of reflections beyond motion.
- Full Text:
- Date Issued: 2013
Determinants of Job Satisfaction Among Academics at A Selected Institution of Higher Learning in The Eastern Cape Province of South Africa
- Mefi, Nteboheng Patricia, Asoba, Samson Nambei
- Authors: Mefi, Nteboheng Patricia , Asoba, Samson Nambei
- Date: 2021
- Subjects: Education (Higher) Education (Higher) Computer File , Job Satisfaction Job Satisfaction Computer File
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/7443 , vital:53976 , https://www.abacademies.org/articles/determinants-of-job-satisfaction-among-academics-at-a-selected-institution-of-higher-learning-in-the-eastern-cape-province-of-sout-13195.html
- Description: Many studies have considered job satisfaction and its antecedents in the profit making sector. These studies have provided a number of factors that influence job satisfaction including autonomy, compensation, growth opportunities, leadership styles, task variety and so on. There are numerous factors that have been discovered to positively influence job satisfaction. Interest in job satisfaction arises from the fact that productivity and other favourable organisational outcomes such as service delivery and quality of outputs have been found to associate with job satisfaction. This study followed a quantitative approach based on a Likert questionnaire to collect data on the antecedents of employee job satisfaction within a Higher Education Institution (HEI) in South Africa. It was established that antecedents of job satisfaction in the HEI resembled closely those established in the literature. It is recommended that HEI should consider factors such as remuneration, task variety, work autonomy, good workplace relations and leadership styles to foster employee motivation. Keywords: Job Satisfaction, Higher Education Institutions, Human Capital, Productivity
- Full Text:
- Date Issued: 2021
- Authors: Mefi, Nteboheng Patricia , Asoba, Samson Nambei
- Date: 2021
- Subjects: Education (Higher) Education (Higher) Computer File , Job Satisfaction Job Satisfaction Computer File
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/11260/7443 , vital:53976 , https://www.abacademies.org/articles/determinants-of-job-satisfaction-among-academics-at-a-selected-institution-of-higher-learning-in-the-eastern-cape-province-of-sout-13195.html
- Description: Many studies have considered job satisfaction and its antecedents in the profit making sector. These studies have provided a number of factors that influence job satisfaction including autonomy, compensation, growth opportunities, leadership styles, task variety and so on. There are numerous factors that have been discovered to positively influence job satisfaction. Interest in job satisfaction arises from the fact that productivity and other favourable organisational outcomes such as service delivery and quality of outputs have been found to associate with job satisfaction. This study followed a quantitative approach based on a Likert questionnaire to collect data on the antecedents of employee job satisfaction within a Higher Education Institution (HEI) in South Africa. It was established that antecedents of job satisfaction in the HEI resembled closely those established in the literature. It is recommended that HEI should consider factors such as remuneration, task variety, work autonomy, good workplace relations and leadership styles to foster employee motivation. Keywords: Job Satisfaction, Higher Education Institutions, Human Capital, Productivity
- Full Text:
- Date Issued: 2021
The deployment of the medico-psychological gaze and disability expertise in relation to children with intellectual disability
- Mckenzie, Judith A, Macleod, Catriona I
- Authors: Mckenzie, Judith A , Macleod, Catriona I
- Date: 2012
- Language: English
- Type: Article
- Identifier: vital:6294 , http://hdl.handle.net/10962/d1014732 , http://www.tandfonline.com/doi/full/10.1080/13603116.2010.540042
- Description: In this study, we adopt the concepts of Michel Foucault on the medical gaze and Nikolas Rose on psychological expertise to differentiate between two forms of expertise evident in the education of intellectually disabled children. We draw on a discourse analytic study carried out in South Africa on intellectual disability in relation to educational practice to examine the operation of a medico-psychological gaze that calls for disability expertise in the management of disability. We conclude our discussion by noting that the dichotomy between impairment and disability that is proposed in the social model of disability does little to destabilise the power of the medico-psychological gaze since impairment is conceded to biomedical knowledge as an object of positive knowledge. This tacit acceptance of the medical authority gives sanction to disability expertise that operates in diffuse ways to regulate the educational experience of learners with intellectual disability. The implications of this conception for inclusive education are briefly explored, and further areas for research are suggested.
- Full Text:
- Date Issued: 2012
- Authors: Mckenzie, Judith A , Macleod, Catriona I
- Date: 2012
- Language: English
- Type: Article
- Identifier: vital:6294 , http://hdl.handle.net/10962/d1014732 , http://www.tandfonline.com/doi/full/10.1080/13603116.2010.540042
- Description: In this study, we adopt the concepts of Michel Foucault on the medical gaze and Nikolas Rose on psychological expertise to differentiate between two forms of expertise evident in the education of intellectually disabled children. We draw on a discourse analytic study carried out in South Africa on intellectual disability in relation to educational practice to examine the operation of a medico-psychological gaze that calls for disability expertise in the management of disability. We conclude our discussion by noting that the dichotomy between impairment and disability that is proposed in the social model of disability does little to destabilise the power of the medico-psychological gaze since impairment is conceded to biomedical knowledge as an object of positive knowledge. This tacit acceptance of the medical authority gives sanction to disability expertise that operates in diffuse ways to regulate the educational experience of learners with intellectual disability. The implications of this conception for inclusive education are briefly explored, and further areas for research are suggested.
- Full Text:
- Date Issued: 2012
Pigs vs people: the use of pigs as analogues for humans in forensic entomology and taphonomy research
- Matuszewski, Szymon, Hall, Martin J R, Moreau, Gaétan, Schoenly, Kenneth G, Tarone, Aaron M, Villet, Martin H
- Authors: Matuszewski, Szymon , Hall, Martin J R , Moreau, Gaétan , Schoenly, Kenneth G , Tarone, Aaron M , Villet, Martin H
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140557 , vital:37898 , DOI: 10.1007/s00414-019-02074-5
- Description: Most studies of decomposition in forensic entomology and taphonomy have used non-human cadavers. Following the recommendation of using domestic pig cadavers as analogues for humans in forensic entomology in the 1980s, pigs became the most frequently used model cadavers in forensic sciences. They have shaped our understanding of how large vertebrate cadavers decompose in, for example, various environments, seasons and after various ante- or postmortem cadaver modifications. They have also been used to demonstrate the feasibility of several new or well-established forensic techniques. The advent of outdoor human taphonomy facilities enabled experimental comparisons of decomposition between pig and human cadavers. Recent comparisons challenged the pig-as-analogue claim in entomology and taphonomy research. In this review, we discuss in a broad methodological context the advantages and disadvantages of pig and human cadavers for forensic research and rebut the critique of pigs as analogues for humans. We conclude that experiments using human cadaver analogues (i.e. pig carcasses) are easier to replicate and more practical for controlling confounding factors than studies based solely on humans and, therefore, are likely to remain our primary epistemic source of forensic knowledge for the immediate future. We supplement these considerations with new guidelines for model cadaver choice in forensic science research.
- Full Text:
- Date Issued: 2019
- Authors: Matuszewski, Szymon , Hall, Martin J R , Moreau, Gaétan , Schoenly, Kenneth G , Tarone, Aaron M , Villet, Martin H
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140557 , vital:37898 , DOI: 10.1007/s00414-019-02074-5
- Description: Most studies of decomposition in forensic entomology and taphonomy have used non-human cadavers. Following the recommendation of using domestic pig cadavers as analogues for humans in forensic entomology in the 1980s, pigs became the most frequently used model cadavers in forensic sciences. They have shaped our understanding of how large vertebrate cadavers decompose in, for example, various environments, seasons and after various ante- or postmortem cadaver modifications. They have also been used to demonstrate the feasibility of several new or well-established forensic techniques. The advent of outdoor human taphonomy facilities enabled experimental comparisons of decomposition between pig and human cadavers. Recent comparisons challenged the pig-as-analogue claim in entomology and taphonomy research. In this review, we discuss in a broad methodological context the advantages and disadvantages of pig and human cadavers for forensic research and rebut the critique of pigs as analogues for humans. We conclude that experiments using human cadaver analogues (i.e. pig carcasses) are easier to replicate and more practical for controlling confounding factors than studies based solely on humans and, therefore, are likely to remain our primary epistemic source of forensic knowledge for the immediate future. We supplement these considerations with new guidelines for model cadaver choice in forensic science research.
- Full Text:
- Date Issued: 2019
Shifting white identities in South Africa: white Africanness and the struggle for racial justice
- Authors: Matthews, Sally
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142180 , vital:38056 , DOI: 10.25159/2413-3086/3821
- Description: The end of apartheid predictably caused something of an identity crisis for white South Africans. The sense of uncertainty about what it means to be white has led to much public debate about whiteness in South Africa, as well as a growing body of literature on whites in post-apartheid South Africa. One of the many responses to this need to rethink white identity has been the claim by some that white South Africans can be considered to be African or ought to begin to think of themselves as being African. This paper argues that whites' assertion of an African identity does not necessarily assist in the achievement of racial justice, but that some kind of shift in white identity is required in order for whites to be able to contribute to the achievement of a racially just South Africa. In making this argument, the paper brings contemporary discussions on race and whiteness, and in particular discussions about racial eliminativism, to bear on the question of whether or not white South Africans may rightly claim an African identity.
- Full Text:
- Date Issued: 2015
- Authors: Matthews, Sally
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142180 , vital:38056 , DOI: 10.25159/2413-3086/3821
- Description: The end of apartheid predictably caused something of an identity crisis for white South Africans. The sense of uncertainty about what it means to be white has led to much public debate about whiteness in South Africa, as well as a growing body of literature on whites in post-apartheid South Africa. One of the many responses to this need to rethink white identity has been the claim by some that white South Africans can be considered to be African or ought to begin to think of themselves as being African. This paper argues that whites' assertion of an African identity does not necessarily assist in the achievement of racial justice, but that some kind of shift in white identity is required in order for whites to be able to contribute to the achievement of a racially just South Africa. In making this argument, the paper brings contemporary discussions on race and whiteness, and in particular discussions about racial eliminativism, to bear on the question of whether or not white South Africans may rightly claim an African identity.
- Full Text:
- Date Issued: 2015
White anti-racism in post-apartheid South Africa:
- Authors: Matthews, Sally
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142361 , vital:38073 , DOI: 10.1080/02589346.2012.683938
- Description: South Africans today live not only with the memory of the racial injustices of the past, but also with present injustices that are a consequence of that past. How should white South Africans live with these past and present injustices? On recognition of the racial injustices of the past and of the continuation of forms of white privilege today, involvement in ongoing anti-racist struggles seems to be an appropriate way for white South Africans to respond to past and present injustices. However, some discussions of the way in which white privilege operates and is perpetuated in post-segregationist societies suggest the need for caution with regard to white involvement in anti-racist struggles, arguing that some of the ways in which white people involve themselves in apparently anti-racist work actually result in the perpetuation rather than the erosion of white privilege. This article explores concerns about the intractability of white privilege while also ultimately defending the appropriateness of white involvement in anti-racist struggles.
- Full Text:
- Date Issued: 2012
- Authors: Matthews, Sally
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142361 , vital:38073 , DOI: 10.1080/02589346.2012.683938
- Description: South Africans today live not only with the memory of the racial injustices of the past, but also with present injustices that are a consequence of that past. How should white South Africans live with these past and present injustices? On recognition of the racial injustices of the past and of the continuation of forms of white privilege today, involvement in ongoing anti-racist struggles seems to be an appropriate way for white South Africans to respond to past and present injustices. However, some discussions of the way in which white privilege operates and is perpetuated in post-segregationist societies suggest the need for caution with regard to white involvement in anti-racist struggles, arguing that some of the ways in which white people involve themselves in apparently anti-racist work actually result in the perpetuation rather than the erosion of white privilege. This article explores concerns about the intractability of white privilege while also ultimately defending the appropriateness of white involvement in anti-racist struggles.
- Full Text:
- Date Issued: 2012
Confronting the Colonial Library: teaching Political Studies amidst calls for a decolonised curriculum
- Authors: Matthews, Sally
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142191 , vital:38057 , DOI: 10.1080/02589346.2018.1418204
- Description: This paper engages with Mudimbe's concept of the ‘colonial library’ with the aim of using this engagement to contribute to current debates about decolonising South African university curricula. The term ‘colonial library’ refers to the body of texts and epistemological order which construct Africa as a symbol of otherness and inferiority. Mudimbe shows that even the most determined attempts to resist the colonial library draw on this same epistemological order. This presents a profound challenge for attempts to decolonise university curricula as it suggests that the colonial library's reach extends into attempts to dismantle it. In response to this challenge, I discuss ways in which we can oppose epistemological ethnocentrism and argue that we need to be open to the possibility of the emancipatory reappropriation of aspects of the colonial library. The paper concludes by relating the foregoing discussion to the South African political studies classroom.
- Full Text:
- Date Issued: 2018
- Authors: Matthews, Sally
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142191 , vital:38057 , DOI: 10.1080/02589346.2018.1418204
- Description: This paper engages with Mudimbe's concept of the ‘colonial library’ with the aim of using this engagement to contribute to current debates about decolonising South African university curricula. The term ‘colonial library’ refers to the body of texts and epistemological order which construct Africa as a symbol of otherness and inferiority. Mudimbe shows that even the most determined attempts to resist the colonial library draw on this same epistemological order. This presents a profound challenge for attempts to decolonise university curricula as it suggests that the colonial library's reach extends into attempts to dismantle it. In response to this challenge, I discuss ways in which we can oppose epistemological ethnocentrism and argue that we need to be open to the possibility of the emancipatory reappropriation of aspects of the colonial library. The paper concludes by relating the foregoing discussion to the South African political studies classroom.
- Full Text:
- Date Issued: 2018
Invaded habitat incompatibility affects the suitability of the potential biological control agent Listronotus sordidus for Sagittaria platyphylla in South Africa
- Martin, Grant D, Coetzee, Julie A, Lloyd, Melissa, Nombewu, Sinoxolo E, Ndlovu, Mpilonhle S, Kwong, Raelene M
- Authors: Martin, Grant D , Coetzee, Julie A , Lloyd, Melissa , Nombewu, Sinoxolo E , Ndlovu, Mpilonhle S , Kwong, Raelene M
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/103926 , vital:32323 , https://doi.org/10.1080/09583157.2018.1460314
- Description: Sagittaria platyphylla (Engelmann) J.G. Smith (Alismataceae) was first recorded in South Africa in 2008 and is considered to be an emerging weed with naturalised populations occurring throughout the country. A biological control programme was initiated in Australia and surveys conducted between 2010 and 2012 yielded potential agents, including the crown feeding weevil, Listronotus sordidus Gyllenhal (Coleoptera: Curculionidae). The potential of L. sordidus as a candidate biological control agent against S. platyphylla in South Africa was examined. Although adult feeding was recorded on a number of plant species, oviposition and larval development indicated a narrow host range restricted to the Alismataceae. In South Africa, S. platyphylla populations are primarily found in inundated systems. However, laboratory studies showed that L. sordidus did not oviposit on inundated plants, potentially nullifying the impact of the insect on South African populations. It is suggested that even though L. sordidus is a damaging, specific agent, its limited impact on inundated plant populations in South Africa does not justify the inherent risk associated with the release of a biological control agent.
- Full Text: false
- Date Issued: 2018
- Authors: Martin, Grant D , Coetzee, Julie A , Lloyd, Melissa , Nombewu, Sinoxolo E , Ndlovu, Mpilonhle S , Kwong, Raelene M
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/103926 , vital:32323 , https://doi.org/10.1080/09583157.2018.1460314
- Description: Sagittaria platyphylla (Engelmann) J.G. Smith (Alismataceae) was first recorded in South Africa in 2008 and is considered to be an emerging weed with naturalised populations occurring throughout the country. A biological control programme was initiated in Australia and surveys conducted between 2010 and 2012 yielded potential agents, including the crown feeding weevil, Listronotus sordidus Gyllenhal (Coleoptera: Curculionidae). The potential of L. sordidus as a candidate biological control agent against S. platyphylla in South Africa was examined. Although adult feeding was recorded on a number of plant species, oviposition and larval development indicated a narrow host range restricted to the Alismataceae. In South Africa, S. platyphylla populations are primarily found in inundated systems. However, laboratory studies showed that L. sordidus did not oviposit on inundated plants, potentially nullifying the impact of the insect on South African populations. It is suggested that even though L. sordidus is a damaging, specific agent, its limited impact on inundated plant populations in South Africa does not justify the inherent risk associated with the release of a biological control agent.
- Full Text: false
- Date Issued: 2018
Evolution of a strongly differentiated suite of phonolites from the Klinghardt Mountains, Namibia
- Authors: Marsh, Julian S
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140400 , vital:37885 , https://doi.org/10.1016/0024-4937(87)90023-5
- Description: Phonolites of Tertiary age occur as eroded tholoids, lava flows, ignimbrites, and coulees in the Klinghardt Mountains of southern Namibia. Sixty samples have been analyzed for major and trace elements and fourteen of these for 87SR 86SR. The phonolites lie close to the low-pressure cotectics in Q-Ne-Ks, in keeping with their petrography which indicates that most samples have phenocrysts of both nepheline and sanidine. Na has been variably lost from the rocks during crystallization and devitrification/alteration of hypocrystalline specimens.
- Full Text: false
- Date Issued: 2003
- Authors: Marsh, Julian S
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/140400 , vital:37885 , https://doi.org/10.1016/0024-4937(87)90023-5
- Description: Phonolites of Tertiary age occur as eroded tholoids, lava flows, ignimbrites, and coulees in the Klinghardt Mountains of southern Namibia. Sixty samples have been analyzed for major and trace elements and fourteen of these for 87SR 86SR. The phonolites lie close to the low-pressure cotectics in Q-Ne-Ks, in keeping with their petrography which indicates that most samples have phenocrysts of both nepheline and sanidine. Na has been variably lost from the rocks during crystallization and devitrification/alteration of hypocrystalline specimens.
- Full Text: false
- Date Issued: 2003
Health literacy test for limited literacy populations (HELT-LL): validation in South Africa
- Marimwe, Chipiwa, Dowse, Roslind
- Authors: Marimwe, Chipiwa , Dowse, Roslind
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/156652 , vital:40035 , https://doi.org/10.1080/2331205X.2019.1650417
- Description: The majority of health literacy measures emanate from high-income countries and are inappropriate for use in limited literacy individuals who are usually excluded from participation in health literacy studies. There is currently no appropriate health literacy measure for the educationally diverse South African population. This study, which reports the validation of the Health Literacy Test for Limited Literacy individuals (HELT-LL), was conducted in primary health-care clinics with 210 isiXhosa-speaking patients with a maximum of 12 years of schooling. The HELT-LL has varied cognitive demands, assesses functional literacy skills as well as local burden of disease knowledge, and also includes self-reported questions.
- Full Text:
- Date Issued: 2019
- Authors: Marimwe, Chipiwa , Dowse, Roslind
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/156652 , vital:40035 , https://doi.org/10.1080/2331205X.2019.1650417
- Description: The majority of health literacy measures emanate from high-income countries and are inappropriate for use in limited literacy individuals who are usually excluded from participation in health literacy studies. There is currently no appropriate health literacy measure for the educationally diverse South African population. This study, which reports the validation of the Health Literacy Test for Limited Literacy individuals (HELT-LL), was conducted in primary health-care clinics with 210 isiXhosa-speaking patients with a maximum of 12 years of schooling. The HELT-LL has varied cognitive demands, assesses functional literacy skills as well as local burden of disease knowledge, and also includes self-reported questions.
- Full Text:
- Date Issued: 2019
The concentrations of the noble metals in Southern African flood-type basalts and MORB: implications for petrogenesis and magmatic sulphide exploration
- Maier, Wolfgand D, Barnes, Sarah-Jane, Marsh, Julian S
- Authors: Maier, Wolfgand D , Barnes, Sarah-Jane , Marsh, Julian S
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150573 , vital:38985 , https://doi.org/10.1007/s00410-003-0480-z
- Description: Concentrations of the platinum-group elements have been determined in several suites of southern African flood-type basalts and mid-ocean ridge basalt (MORB), covering some 3 Ga of geologic evolution and including the Etendeka, Karoo, Soutpansberg, Machadodorp, Hekpoort, Ventersdorp and Dominion magmas.
- Full Text: false
- Date Issued: 2003
- Authors: Maier, Wolfgand D , Barnes, Sarah-Jane , Marsh, Julian S
- Date: 2003
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/150573 , vital:38985 , https://doi.org/10.1007/s00410-003-0480-z
- Description: Concentrations of the platinum-group elements have been determined in several suites of southern African flood-type basalts and mid-ocean ridge basalt (MORB), covering some 3 Ga of geologic evolution and including the Etendeka, Karoo, Soutpansberg, Machadodorp, Hekpoort, Ventersdorp and Dominion magmas.
- Full Text: false
- Date Issued: 2003
Politics and science in Radcliffe-Brown: from anarchism to applied anthropology
- Authors: Maddock, Kenneth
- Date: 1994
- Subjects: Radcliffe-Brown, A. R. (Alfred Reginald), 1881-1955 Anthropologists Anthropology Ethnology
- Language: English
- Type: Manuscript , Text
- Identifier: http://hdl.handle.net/10962/2645 , vital:20312
- Description: It is part of anthropological folklore that A. R. Radcliffe-Brown (1881-1955) was known as "Anarchy Brown" when a student at Cambridge early this century. Meyer Fortes thought the nickname "a friendly recognition of the streak of aloofness in him and of his reputation for holding somewhat highbrow ideas in matters of art, life and literature" (1956: 153)- But there was more to it than the pose of a turn of the century aesthete, as Fortes knew. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Date Issued: 1994
- Authors: Maddock, Kenneth
- Date: 1994
- Subjects: Radcliffe-Brown, A. R. (Alfred Reginald), 1881-1955 Anthropologists Anthropology Ethnology
- Language: English
- Type: Manuscript , Text
- Identifier: http://hdl.handle.net/10962/2645 , vital:20312
- Description: It is part of anthropological folklore that A. R. Radcliffe-Brown (1881-1955) was known as "Anarchy Brown" when a student at Cambridge early this century. Meyer Fortes thought the nickname "a friendly recognition of the streak of aloofness in him and of his reputation for holding somewhat highbrow ideas in matters of art, life and literature" (1956: 153)- But there was more to it than the pose of a turn of the century aesthete, as Fortes knew. , Digitised by Rhodes University Library on behalf of the Institute of Social and Economic Research (ISER)
- Full Text:
- Date Issued: 1994
Formative interventionist research generating iterative mediation processes in a vocational education and training learning network
- Lotz-Sisitka, Heila, Pesanayi, Tichaona V
- Authors: Lotz-Sisitka, Heila , Pesanayi, Tichaona V
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/370575 , vital:66356 , ISBN 9780429279362 , https://doi.org/10.4324/9780429279362
- Description: This chapter addresses a research problem identified in the vocational agricultural learning system where there was a gap in vocational education and training knowledge flow from research institutions to knowledge users. The chapter develops a theoretical framework for dealing with the problem of ‘knowledge flow’ in vocational education and training settings. The problem emerges around the uptake and use of relevant research-based knowledge resources on rainwater harvesting and conservation practices for agricultural education and training focused on small-scale farmers and household food producers in South Africa. These resources, despite their contemporary relevance, were not being used in agricultural colleges or in the related agricultural learning support system. Drawing on a social ecosystemic approach to knowledge flow and mediation, the chapter surfaces five iterative mediation processes developed via a generative, formative interventionist research process over a five year period (Lotz-Sisitka et al. 2016; Pesanayi, 2019; cf. Chapter 8) that facilitated the development of a regional learning network which enabled vertical facilitatory processes and horizontal connectivities that impacted on farmers’ food production system, as well as the agricultural learning system. We illuminate key features of these as important for supporting knowledge flow within a regional social ecosystemic framework for skills development.
- Full Text:
- Date Issued: 2019
- Authors: Lotz-Sisitka, Heila , Pesanayi, Tichaona V
- Date: 2019
- Subjects: To be catalogued
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/370575 , vital:66356 , ISBN 9780429279362 , https://doi.org/10.4324/9780429279362
- Description: This chapter addresses a research problem identified in the vocational agricultural learning system where there was a gap in vocational education and training knowledge flow from research institutions to knowledge users. The chapter develops a theoretical framework for dealing with the problem of ‘knowledge flow’ in vocational education and training settings. The problem emerges around the uptake and use of relevant research-based knowledge resources on rainwater harvesting and conservation practices for agricultural education and training focused on small-scale farmers and household food producers in South Africa. These resources, despite their contemporary relevance, were not being used in agricultural colleges or in the related agricultural learning support system. Drawing on a social ecosystemic approach to knowledge flow and mediation, the chapter surfaces five iterative mediation processes developed via a generative, formative interventionist research process over a five year period (Lotz-Sisitka et al. 2016; Pesanayi, 2019; cf. Chapter 8) that facilitated the development of a regional learning network which enabled vertical facilitatory processes and horizontal connectivities that impacted on farmers’ food production system, as well as the agricultural learning system. We illuminate key features of these as important for supporting knowledge flow within a regional social ecosystemic framework for skills development.
- Full Text:
- Date Issued: 2019
Transgressing the norm: Transformative agency in community-based learning for sustainability in southern African contexts
- Lotz-Sisitka, Heila, Mukute, Mutizwa, Chikunda, Charles, Baloi, Aristides, Pesanayi, Tichaona V
- Authors: Lotz-Sisitka, Heila , Mukute, Mutizwa , Chikunda, Charles , Baloi, Aristides , Pesanayi, Tichaona V
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127204 , vital:35977 , https://10.1007/s11159-017-9689-3
- Description: Environment and sustainability education processes are often oriented to change and transformation, and frequently involve the emergence of new forms of human activity. However, not much is known about how such change emerges from the learning process, or how it contributes to the development of transformative agency in community contexts. The authors of this article present four cross-case perspectives of expansive learning and transformative agency development in community-based education in southern Africa, studying communities pursuing new activities that are more socially just and sustainable. The four cases of community learning and transformative agency focus on the following activities: (1) sustainable agriculture in Lesotho; (2) seed saving and rainwater harvesting in Zimbabwe; (3) community-based irrigation scheme management in Mozambique; and (4) biodiversity conservation co-management in South Africa. The case studies all draw on cultural-historical activity theory to guide learning and change processes, especially third-generation cultural-historical activity theory (CHAT), which emphasises expansive learning in collectives across interacting activity systems. CHAT researchers, such as the authors of this article, argue that expansive learning can lead to the emergence of transformative agency. The authors extend their transformative agency analysis to probe if and how expansive learning might also facilitate instances of transgressing norms – viewed here as embedded practices which need to be reframed and changed in order for sustainability to emerge.
- Full Text:
- Date Issued: 2017
- Authors: Lotz-Sisitka, Heila , Mukute, Mutizwa , Chikunda, Charles , Baloi, Aristides , Pesanayi, Tichaona V
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127204 , vital:35977 , https://10.1007/s11159-017-9689-3
- Description: Environment and sustainability education processes are often oriented to change and transformation, and frequently involve the emergence of new forms of human activity. However, not much is known about how such change emerges from the learning process, or how it contributes to the development of transformative agency in community contexts. The authors of this article present four cross-case perspectives of expansive learning and transformative agency development in community-based education in southern Africa, studying communities pursuing new activities that are more socially just and sustainable. The four cases of community learning and transformative agency focus on the following activities: (1) sustainable agriculture in Lesotho; (2) seed saving and rainwater harvesting in Zimbabwe; (3) community-based irrigation scheme management in Mozambique; and (4) biodiversity conservation co-management in South Africa. The case studies all draw on cultural-historical activity theory to guide learning and change processes, especially third-generation cultural-historical activity theory (CHAT), which emphasises expansive learning in collectives across interacting activity systems. CHAT researchers, such as the authors of this article, argue that expansive learning can lead to the emergence of transformative agency. The authors extend their transformative agency analysis to probe if and how expansive learning might also facilitate instances of transgressing norms – viewed here as embedded practices which need to be reframed and changed in order for sustainability to emerge.
- Full Text:
- Date Issued: 2017
The thermal decomposition of copper (II) oxalate revisited
- Lamprecht, Emmanuel, Watkins, Gareth M, Brown, Michael E
- Authors: Lamprecht, Emmanuel , Watkins, Gareth M , Brown, Michael E
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6577 , http://hdl.handle.net/10962/d1004140
- Description: DSC, TG and TG-FT-IR, and XRPD have been used to examine the effects of supposedly inert atmospheres of argon and nitrogen on the mechanism of the thermal decomposition of copper(II) oxalate. The DSC curves in pure argon at 10 °C min[superscript −1] show a broad endotherm with onset at about 280 °C and maximum at about 295 °C. In mixtures of argon and nitrogen, as the proportion of argon gas is decreased, the endothermic character of the decomposition decreases until, when nitrogen is the main component, the decomposition exhibits a complex broad exothermic character. XRPD studies showed that, regardless of the proportions of nitrogen and argon, the DSC residues consisted of mainly copper metal with small amounts of copper(I) oxide (cuprite) and, under some conditions, traces of copper(II) oxide (tenorite). Various explanations for this behaviour are discussed and a possible answer lies in the disproportionation of CO[subscript 2](g) to form small quantities of O[subscript 2](g) or monatomic oxygen. The possibility exists that the exothermicity in nitrogen could be explained by reaction of the nitrogen with atomic oxygen to form N[subscript 2]O(g), but this product could not be detected using TG-FT-IR.
- Full Text:
- Date Issued: 2006
- Authors: Lamprecht, Emmanuel , Watkins, Gareth M , Brown, Michael E
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:6577 , http://hdl.handle.net/10962/d1004140
- Description: DSC, TG and TG-FT-IR, and XRPD have been used to examine the effects of supposedly inert atmospheres of argon and nitrogen on the mechanism of the thermal decomposition of copper(II) oxalate. The DSC curves in pure argon at 10 °C min[superscript −1] show a broad endotherm with onset at about 280 °C and maximum at about 295 °C. In mixtures of argon and nitrogen, as the proportion of argon gas is decreased, the endothermic character of the decomposition decreases until, when nitrogen is the main component, the decomposition exhibits a complex broad exothermic character. XRPD studies showed that, regardless of the proportions of nitrogen and argon, the DSC residues consisted of mainly copper metal with small amounts of copper(I) oxide (cuprite) and, under some conditions, traces of copper(II) oxide (tenorite). Various explanations for this behaviour are discussed and a possible answer lies in the disproportionation of CO[subscript 2](g) to form small quantities of O[subscript 2](g) or monatomic oxygen. The possibility exists that the exothermicity in nitrogen could be explained by reaction of the nitrogen with atomic oxygen to form N[subscript 2]O(g), but this product could not be detected using TG-FT-IR.
- Full Text:
- Date Issued: 2006
Probing the structural dynamics of the Plasmodium falciparum tunneling-fold enzyme 6-pyruvoyl tetrahydropterin synthase to reveal allosteric drug targeting sites:
- Khairallah, Afrah, Ross, Caroline J, Tastan Bishop, Özlem
- Authors: Khairallah, Afrah , Ross, Caroline J , Tastan Bishop, Özlem
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/163057 , vital:41008 , https://doi.org/10.3389/fmolb.2020.575196
- Description: The de novo folate synthesis pathway is a well-established drug target in the treatment of many infectious diseases. Antimalarial antifolate drugs have proven to be effective against malaria, however, rapid drug resistance has emerged on the two primary targeted enzymes: dihydrofolate reductase and dihydroptoreate synthase. The need to identify alternative antifolate drugs and novel metabolic targets is of imminent importance. The 6-pyruvol tetrahydropterin synthase (PTPS) enzyme belongs to the tunneling fold protein superfamily which is characterized by a distinct central tunnel/cavity. The enzyme catalyzes the second reaction step of the parasite’s de novo folate synthesis pathway and is responsible for the conversion of 7,8-dihydroneopterin to 6-pyruvoyl-tetrahydropterin. In this study, we examine the structural dynamics of Plasmodium falciparum PTPS using the anisotropic network model, to elucidate the collective motions that drive the function of the enzyme and identify potential sites for allosteric modulation of its binding properties.
- Full Text:
- Date Issued: 2020
- Authors: Khairallah, Afrah , Ross, Caroline J , Tastan Bishop, Özlem
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/163057 , vital:41008 , https://doi.org/10.3389/fmolb.2020.575196
- Description: The de novo folate synthesis pathway is a well-established drug target in the treatment of many infectious diseases. Antimalarial antifolate drugs have proven to be effective against malaria, however, rapid drug resistance has emerged on the two primary targeted enzymes: dihydrofolate reductase and dihydroptoreate synthase. The need to identify alternative antifolate drugs and novel metabolic targets is of imminent importance. The 6-pyruvol tetrahydropterin synthase (PTPS) enzyme belongs to the tunneling fold protein superfamily which is characterized by a distinct central tunnel/cavity. The enzyme catalyzes the second reaction step of the parasite’s de novo folate synthesis pathway and is responsible for the conversion of 7,8-dihydroneopterin to 6-pyruvoyl-tetrahydropterin. In this study, we examine the structural dynamics of Plasmodium falciparum PTPS using the anisotropic network model, to elucidate the collective motions that drive the function of the enzyme and identify potential sites for allosteric modulation of its binding properties.
- Full Text:
- Date Issued: 2020
Gaming culture: what lessons for pedagogy in South Africa?
- Kaschula, Russell H, Mostert, Andre
- Authors: Kaschula, Russell H , Mostert, Andre
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/175189 , vital:42551 , https://hdl.handle.net/10520/EJC30895
- Description: Gaming culture is becoming increasingly ubiquitous. Whereas before it was the reserve of those who were prepared to invest in the latest gaming hardware, increasingly powerful entry level machines coupled with more powerful mobile technologies are impacting on how young learners and students assimilate information. This evolving characteristic exhibited by the learners across South Africa must generate a serious reflection of education and training methodologies. Historically, education structures have been slow to embrace the changes that are imperative if the products of the process are to be adequately prepared for the future that faces them. One of the most telling realities of the modern era, or the planetary phase as it is now being tagged, is rapid change. The question that all educators need to ask is 'how is my pedagogic approach evolving'?.
- Full Text:
- Date Issued: 2010
- Authors: Kaschula, Russell H , Mostert, Andre
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/175189 , vital:42551 , https://hdl.handle.net/10520/EJC30895
- Description: Gaming culture is becoming increasingly ubiquitous. Whereas before it was the reserve of those who were prepared to invest in the latest gaming hardware, increasingly powerful entry level machines coupled with more powerful mobile technologies are impacting on how young learners and students assimilate information. This evolving characteristic exhibited by the learners across South Africa must generate a serious reflection of education and training methodologies. Historically, education structures have been slow to embrace the changes that are imperative if the products of the process are to be adequately prepared for the future that faces them. One of the most telling realities of the modern era, or the planetary phase as it is now being tagged, is rapid change. The question that all educators need to ask is 'how is my pedagogic approach evolving'?.
- Full Text:
- Date Issued: 2010
Culture, language and productivity in the workplace within the BRICS Nations:
- Kaschula, Russell H, Mostert, Andre, Wolff, H Ekkehard
- Authors: Kaschula, Russell H , Mostert, Andre , Wolff, H Ekkehard
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/174624 , vital:42495 , https://journals.co.za/doi/pdf/10.25159/2663-6697/5009
- Description: The changing economic environment globally carries challenges and opportunities for business. Cross-cultural environments and financial integration call for greater understanding of the workplace. The authors assess the usage and status of language and culture in workplaces within the BRICS (Brazil, Russia, India, China, South Africa) countries through a light touch survey to assist in framing further and deeper research activities. The objective is to develop a suitable research framework regarding the place of language and culture in the workplace in multilingual and multicultural contexts. The authors argue for the inclusion of a cultural dimension linked to multilingual strategies in the workplace. The inextricable link between language and culture is explored in this article.
- Full Text:
- Date Issued: 2019
- Authors: Kaschula, Russell H , Mostert, Andre , Wolff, H Ekkehard
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/174624 , vital:42495 , https://journals.co.za/doi/pdf/10.25159/2663-6697/5009
- Description: The changing economic environment globally carries challenges and opportunities for business. Cross-cultural environments and financial integration call for greater understanding of the workplace. The authors assess the usage and status of language and culture in workplaces within the BRICS (Brazil, Russia, India, China, South Africa) countries through a light touch survey to assist in framing further and deeper research activities. The objective is to develop a suitable research framework regarding the place of language and culture in the workplace in multilingual and multicultural contexts. The authors argue for the inclusion of a cultural dimension linked to multilingual strategies in the workplace. The inextricable link between language and culture is explored in this article.
- Full Text:
- Date Issued: 2019
Analyzing, digitizing and technologizing the oral word: the case of Bongani Sitole
- Kaschula, Russell H, Mostert, André
- Authors: Kaschula, Russell H , Mostert, André
- Date: 2009
- Subjects: Sitole, Bongani, 1937- , Xhosa (African people) -- South Africa , Xhosa poetry , Folk poetry, Xhosa
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59368 , vital:27566 , https://doi.org/10.1080/13696810903259384
- Description: This article analyzes 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 technologizing and publication of this poetry in book form and on a website. The initial part of this article looks at the life and work of the poet. A contextual analysis of selected poetry is provided. The latter part of the article concentrates on issues related to technology and its relationship to the oral and written word. The term ‘technauriture’ has been coined in order to refer to this process. The contribution of eLearning4Africa (www.elearning4africa.com) to the digitization process of Sitole’s poetry is acknowledged.
- Full Text:
- Date Issued: 2009
- Authors: Kaschula, Russell H , Mostert, André
- Date: 2009
- Subjects: Sitole, Bongani, 1937- , Xhosa (African people) -- South Africa , Xhosa poetry , Folk poetry, Xhosa
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59368 , vital:27566 , https://doi.org/10.1080/13696810903259384
- Description: This article analyzes 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 technologizing and publication of this poetry in book form and on a website. The initial part of this article looks at the life and work of the poet. A contextual analysis of selected poetry is provided. The latter part of the article concentrates on issues related to technology and its relationship to the oral and written word. The term ‘technauriture’ has been coined in order to refer to this process. The contribution of eLearning4Africa (www.elearning4africa.com) to the digitization process of Sitole’s poetry is acknowledged.
- Full Text:
- Date Issued: 2009