Types of case study work : a conceptual framework for case-based research
- Authors: Edwards, D J A
- Date: 1998
- Language: English
- Type: Article
- Identifier: vital:6240 , http://hdl.handle.net/10962/d1007852
- Description: This paper describes a conceptual framework for understanding the phases of casebased research. Case-based strategies in research are widely used in case study methodology as well as in a number of qualitative methodologies including grounded theory development, phenomenological research method and psychotherapy process research. The epistemological principles upon which casebased research is based are fundamentally different those which inform groupbased research using quantitative multivariate statistics. The case-based research process is divided into three general phases: descriptive, theoretical-heuristic, and theory-testing. Each of these phases is subdivided into two categories. The aims and epistemological principles related to each phase are discussed and illustrated with examples from contemporary research. The principles for establishing validity in case-base research are also reviewed and, in order to assist research students and supervisors, some common pitfalls are noted. The paper shows that rigorous work with single cases or series of cases using case-based principles and methodology is indeed, as Bromley (1986) claimed, "the bedrock of scientific investigation".
- Full Text:
- Date Issued: 1998
- Authors: Edwards, D J A
- Date: 1998
- Language: English
- Type: Article
- Identifier: vital:6240 , http://hdl.handle.net/10962/d1007852
- Description: This paper describes a conceptual framework for understanding the phases of casebased research. Case-based strategies in research are widely used in case study methodology as well as in a number of qualitative methodologies including grounded theory development, phenomenological research method and psychotherapy process research. The epistemological principles upon which casebased research is based are fundamentally different those which inform groupbased research using quantitative multivariate statistics. The case-based research process is divided into three general phases: descriptive, theoretical-heuristic, and theory-testing. Each of these phases is subdivided into two categories. The aims and epistemological principles related to each phase are discussed and illustrated with examples from contemporary research. The principles for establishing validity in case-base research are also reviewed and, in order to assist research students and supervisors, some common pitfalls are noted. The paper shows that rigorous work with single cases or series of cases using case-based principles and methodology is indeed, as Bromley (1986) claimed, "the bedrock of scientific investigation".
- Full Text:
- Date Issued: 1998
Microbial monitoring of surface water in South Africa: an overview
- Luyt, Catherine D, Tandlich, Roman, Muller, Wilhelmine J, Wilhelmi, Brendan S
- Authors: Luyt, Catherine D , Tandlich, Roman , Muller, Wilhelmine J , Wilhelmi, Brendan S
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71636 , vital:29927 , https://doi.org/10.3390/ijerph9082669
- Description: Infrastructural problems force South African households to supplement their drinking water consumption from water resources of inadequate microbial quality. Microbial water quality monitoring is currently based on the Colilert®18 system which leads to rapidly available results. Using Escherichia coli as the indicator microorganism limits the influence of environmental sources on the reported results. The current system allows for understanding of long-term trends of microbial surface water quality and the related public health risks. However, rates of false positive for the Colilert®18-derived concentrations have been reported to range from 7.4% to 36.4%. At the same time, rates of false negative results vary from 3.5% to 12.5%; and the Colilert medium has been reported to provide for cultivation of only 56.8% of relevant strains. Identification of unknown sources of faecal contamination is not currently feasible. Based on literature review, calibration of the antibiotic-resistance spectra of Escherichia coli or the bifidobacterial tracking ratio should be investigated locally for potential implementation into the existing monitoring system. The current system could be too costly to implement in certain areas of South Africa where the modified H2S strip test might be used as a surrogate for the Colilert®18.
- Full Text:
- Date Issued: 2012
- Authors: Luyt, Catherine D , Tandlich, Roman , Muller, Wilhelmine J , Wilhelmi, Brendan S
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/71636 , vital:29927 , https://doi.org/10.3390/ijerph9082669
- Description: Infrastructural problems force South African households to supplement their drinking water consumption from water resources of inadequate microbial quality. Microbial water quality monitoring is currently based on the Colilert®18 system which leads to rapidly available results. Using Escherichia coli as the indicator microorganism limits the influence of environmental sources on the reported results. The current system allows for understanding of long-term trends of microbial surface water quality and the related public health risks. However, rates of false positive for the Colilert®18-derived concentrations have been reported to range from 7.4% to 36.4%. At the same time, rates of false negative results vary from 3.5% to 12.5%; and the Colilert medium has been reported to provide for cultivation of only 56.8% of relevant strains. Identification of unknown sources of faecal contamination is not currently feasible. Based on literature review, calibration of the antibiotic-resistance spectra of Escherichia coli or the bifidobacterial tracking ratio should be investigated locally for potential implementation into the existing monitoring system. The current system could be too costly to implement in certain areas of South Africa where the modified H2S strip test might be used as a surrogate for the Colilert®18.
- Full Text:
- Date Issued: 2012
Taxation and electronic commerce
- Stelloh, Marcus M, Stack, Elizabeth M
- Authors: Stelloh, Marcus M , Stack, Elizabeth M
- Date: 2008
- Subjects: To be catalogued
- Language: English
- Type: Conference paper
- Identifier: vital:6066 , http://hdl.handle.net/10962/d1004611
- Description: Transactions conducted using the Internet have expanded dramatically in the past few years and countries and their governments have become concerned about the consequences that electronic commerce may have on their tax revenues. Because of this many organisations and inter-governmental agencies have met to try to design a solution that will be compatible with the systems of the various countries and achieve tax neutrality. A number of proposals were made and discussed to try to design a fair and efficient e-tax system. The proposed system that is ultimately adopted must consider different tax bases and systems in order to achieve this. In this research the impact of e-commerce on the imposition of income tax was briefly referred to and four different proposals for levying value-added tax or sales tax were analysed in order to compare the advantages and disadvantages of each and to determine which system would most adequately address the needs of e-commerce. Certain modifications and additions to the proposed systems have been suggested in order to satisfy the specific needs of the South African tax system, while still taking other countries’ tax systems into account. Using Amazon.com Inc. and Skype Technologies South Africa Limited as examples, it is demonstrated how the new amended system will work. It was found that the proposed systems and the system adapted to meet the South African needs would, with a few relatively minor changes to the Value-Added Tax legislation, be suitable for the purposes of imposing value-added tax on e-commerce transactions.
- Full Text:
- Date Issued: 2008
- Authors: Stelloh, Marcus M , Stack, Elizabeth M
- Date: 2008
- Subjects: To be catalogued
- Language: English
- Type: Conference paper
- Identifier: vital:6066 , http://hdl.handle.net/10962/d1004611
- Description: Transactions conducted using the Internet have expanded dramatically in the past few years and countries and their governments have become concerned about the consequences that electronic commerce may have on their tax revenues. Because of this many organisations and inter-governmental agencies have met to try to design a solution that will be compatible with the systems of the various countries and achieve tax neutrality. A number of proposals were made and discussed to try to design a fair and efficient e-tax system. The proposed system that is ultimately adopted must consider different tax bases and systems in order to achieve this. In this research the impact of e-commerce on the imposition of income tax was briefly referred to and four different proposals for levying value-added tax or sales tax were analysed in order to compare the advantages and disadvantages of each and to determine which system would most adequately address the needs of e-commerce. Certain modifications and additions to the proposed systems have been suggested in order to satisfy the specific needs of the South African tax system, while still taking other countries’ tax systems into account. Using Amazon.com Inc. and Skype Technologies South Africa Limited as examples, it is demonstrated how the new amended system will work. It was found that the proposed systems and the system adapted to meet the South African needs would, with a few relatively minor changes to the Value-Added Tax legislation, be suitable for the purposes of imposing value-added tax on e-commerce transactions.
- Full Text:
- Date Issued: 2008
Rhodes University 2018 Graduation Ceremony: 1820 Settlers' National Monument, Friday, 6 April at 09:30
- Authors: Rhodes University
- Date: 2018
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/64590 , vital:28563 , https://www.youtube.com/watch?v=Ae_eNPkpqL8 , https://www.youtube.com/watch?v=HNB6ZTKWmGw , https://www.youtube.com/watch?v=vqz7OftlW7M , https://www.youtube.com/watch?v=ALxeywz_eYs
- Description: Rhodes University 2018 Graduation Programme, 6 April at 09:30: Bachelor’s: Bachelor of Science, Bachelor of Science (Information Systems),Bachelor of Science (Software Development) Honours: Bachelor of Science Honours. Doctorate: PhD in Science.
- Full Text:
- Date Issued: 2018
- Authors: Rhodes University
- Date: 2018
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/64590 , vital:28563 , https://www.youtube.com/watch?v=Ae_eNPkpqL8 , https://www.youtube.com/watch?v=HNB6ZTKWmGw , https://www.youtube.com/watch?v=vqz7OftlW7M , https://www.youtube.com/watch?v=ALxeywz_eYs
- Description: Rhodes University 2018 Graduation Programme, 6 April at 09:30: Bachelor’s: Bachelor of Science, Bachelor of Science (Information Systems),Bachelor of Science (Software Development) Honours: Bachelor of Science Honours. Doctorate: PhD in Science.
- Full Text:
- Date Issued: 2018
Transport and General Workers Union: congress report financial progress report for period July 1988 to November 1989
- Transport and General Workers' Union (South Africa)
- Authors: Transport and General Workers' Union (South Africa)
- Date: 1989-07
- Subjects: Uncatalogued
- Language: eng
- Type: text , pamphlet
- Identifier: http://hdl.handle.net/10962/103428 , vital:32245
- Description: In reviewing the developments in T&G finances over the past eighteen months, we can safely say that T&G finances have certainly stabilized over the period. However, in case we get too excited at this news, a note of caution. While our income from subscriptions has steadily improved, due mainly to the Congress ’88 increase in rate (from R3 to R4); our expenditure has in relation also increased to the point that if we continue with our current expenditure pace of October ’89 and November 89, we will soon return to our previous problem of constant threat of bank overdraft! We are a long way off self-sufficiency and still rely heavily on our overseas funders for assistance in the areas of legal fees and our education programme. This report will focus on both the positive developments in T&G finances over these past eighteen months, as well as the problem areas which we need to seriously tackle from here!
- Full Text:
- Date Issued: 1989-07
- Authors: Transport and General Workers' Union (South Africa)
- Date: 1989-07
- Subjects: Uncatalogued
- Language: eng
- Type: text , pamphlet
- Identifier: http://hdl.handle.net/10962/103428 , vital:32245
- Description: In reviewing the developments in T&G finances over the past eighteen months, we can safely say that T&G finances have certainly stabilized over the period. However, in case we get too excited at this news, a note of caution. While our income from subscriptions has steadily improved, due mainly to the Congress ’88 increase in rate (from R3 to R4); our expenditure has in relation also increased to the point that if we continue with our current expenditure pace of October ’89 and November 89, we will soon return to our previous problem of constant threat of bank overdraft! We are a long way off self-sufficiency and still rely heavily on our overseas funders for assistance in the areas of legal fees and our education programme. This report will focus on both the positive developments in T&G finances over these past eighteen months, as well as the problem areas which we need to seriously tackle from here!
- Full Text:
- Date Issued: 1989-07
Regulatory incoherence and economic potential of freshwater recreational fisheries: the trout triangle in South Africa
- Marire, Juniours, Snowball, Jeanette D, Fraser, Gavin C G
- Authors: Marire, Juniours , Snowball, Jeanette D , Fraser, Gavin C G
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68621 , vital:29295 , https://www.tandfonline.com/doi/abs/10.2753/JEI0021-3624480406
- Description: Publisher version , We apply John R. Commons’s negotiational psychology, specifically his principle of sovereignty, to the development of a discordant regulatory culture and its likely impact on the economic potential of recreational fishing. Using South African environmental judicial precedents and other documentation, we formulate six plausible hypotheses. We argue that regulatory incoherence, entitlement insecurity, corporate-dominated social valuation, strategic power coalitions, lack of procedural fairness, and the extent of judicial enforcement of environmental rights help explain the economic potential and isolation of the freshwater recreational fisheries sector. We find a consistent pattern of extraction and monopolization of sovereign power by the Department of Mineral Resources from propertied parties. Thus, regulatory domination is a major mechanism affecting the economic potential of recreational fisheries in the Trout Triangle. While Commons postulated that private property is a sufficient condition for participation in the determination and use of sovereign power, we argue that private/public property is only a necessary condition. The conjunctive sufficient condition is the existence of both regulatory coherence between spheres of government and property.
- Full Text: false
- Date Issued: 2014
- Authors: Marire, Juniours , Snowball, Jeanette D , Fraser, Gavin C G
- Date: 2014
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68621 , vital:29295 , https://www.tandfonline.com/doi/abs/10.2753/JEI0021-3624480406
- Description: Publisher version , We apply John R. Commons’s negotiational psychology, specifically his principle of sovereignty, to the development of a discordant regulatory culture and its likely impact on the economic potential of recreational fishing. Using South African environmental judicial precedents and other documentation, we formulate six plausible hypotheses. We argue that regulatory incoherence, entitlement insecurity, corporate-dominated social valuation, strategic power coalitions, lack of procedural fairness, and the extent of judicial enforcement of environmental rights help explain the economic potential and isolation of the freshwater recreational fisheries sector. We find a consistent pattern of extraction and monopolization of sovereign power by the Department of Mineral Resources from propertied parties. Thus, regulatory domination is a major mechanism affecting the economic potential of recreational fisheries in the Trout Triangle. While Commons postulated that private property is a sufficient condition for participation in the determination and use of sovereign power, we argue that private/public property is only a necessary condition. The conjunctive sufficient condition is the existence of both regulatory coherence between spheres of government and property.
- Full Text: false
- Date Issued: 2014
NUM Education strategic plan
- NUM
- Authors: NUM
- Date: 2002-2005
- Subjects: NUM
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/113988 , vital:33867
- Description: The Education Department believes it is important that when assembling a strategic education plan for the next three years, a thorough discussion needs to take place within the Union as a whole about the context that we find ourselves in, and the challenges, which emerge, for our members. What follows are the observations of the Education Department informed by the Unions Ten Year plan and other policy engagements. It is not an exhaustive survey that is offered here, but what are considered key points.
- Full Text:
- Date Issued: 2002-2005
- Authors: NUM
- Date: 2002-2005
- Subjects: NUM
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/113988 , vital:33867
- Description: The Education Department believes it is important that when assembling a strategic education plan for the next three years, a thorough discussion needs to take place within the Union as a whole about the context that we find ourselves in, and the challenges, which emerge, for our members. What follows are the observations of the Education Department informed by the Unions Ten Year plan and other policy engagements. It is not an exhaustive survey that is offered here, but what are considered key points.
- Full Text:
- Date Issued: 2002-2005
Identification of Novel Potential Inhibitors of Pteridine Reductase 1 in Trypanosoma brucei via Computational Structure-Based Approaches and in Vitro Inhibition Assays
- Kimuda, Magambo Phillip, Laming, Dustin, Hoppe, Heinrich C, Tastan Bishop, Özlem
- Authors: Kimuda, Magambo Phillip , Laming, Dustin , Hoppe, Heinrich C , Tastan Bishop, Özlem
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124675 , vital:35647 , https://doi:10.3390/molecules24010142
- Description: Pteridine reductase 1 (PTR1) is a trypanosomatid multifunctional enzyme that provides a mechanism for escape of dihydrofolate reductase (DHFR) inhibition. This is because PTR1 can reduce pterins and folates. Trypanosomes require folates and pterins for survival and are unable to synthesize them de novo. Currently there are no anti-folate based Human African Trypanosomiasis (HAT) chemotherapeutics in use. Thus, successful dual inhibition of Trypanosoma brucei dihydrofolate reductase (TbDHFR) and Trypanosoma brucei pteridine reductase 1 (TbPTR1) has implications in the exploitation of anti-folates. We carried out molecular docking of a ligand library of 5742 compounds against TbPTR1 and identified 18 compounds showing promising binding modes. The protein-ligand complexes were subjected to molecular dynamics to characterize their molecular interactions and energetics, followed by in vitro testing. In this study, we identified five compounds which showed low micromolar Trypanosome growth inhibition in in vitro experiments that might be acting by inhibition of TbPTR1. Compounds RUBi004, RUBi007, RUBi014, and RUBi018 displayed moderate to strong antagonism (mutual reduction in potency) when used in combination with the known TbDHFR inhibitor, WR99210. This gave an indication that the compounds might inhibit both TbPTR1 and TbDHFR. RUBi016 showed an additive effect in the isobologram assay. Overall, our results provide a basis for scaffold optimization for further studies in the development of HAT anti-folates.
- Full Text:
- Date Issued: 2019
- Authors: Kimuda, Magambo Phillip , Laming, Dustin , Hoppe, Heinrich C , Tastan Bishop, Özlem
- Date: 2019
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124675 , vital:35647 , https://doi:10.3390/molecules24010142
- Description: Pteridine reductase 1 (PTR1) is a trypanosomatid multifunctional enzyme that provides a mechanism for escape of dihydrofolate reductase (DHFR) inhibition. This is because PTR1 can reduce pterins and folates. Trypanosomes require folates and pterins for survival and are unable to synthesize them de novo. Currently there are no anti-folate based Human African Trypanosomiasis (HAT) chemotherapeutics in use. Thus, successful dual inhibition of Trypanosoma brucei dihydrofolate reductase (TbDHFR) and Trypanosoma brucei pteridine reductase 1 (TbPTR1) has implications in the exploitation of anti-folates. We carried out molecular docking of a ligand library of 5742 compounds against TbPTR1 and identified 18 compounds showing promising binding modes. The protein-ligand complexes were subjected to molecular dynamics to characterize their molecular interactions and energetics, followed by in vitro testing. In this study, we identified five compounds which showed low micromolar Trypanosome growth inhibition in in vitro experiments that might be acting by inhibition of TbPTR1. Compounds RUBi004, RUBi007, RUBi014, and RUBi018 displayed moderate to strong antagonism (mutual reduction in potency) when used in combination with the known TbDHFR inhibitor, WR99210. This gave an indication that the compounds might inhibit both TbPTR1 and TbDHFR. RUBi016 showed an additive effect in the isobologram assay. Overall, our results provide a basis for scaffold optimization for further studies in the development of HAT anti-folates.
- Full Text:
- Date Issued: 2019
Language and learning science in South Africa
- Authors: Probyn, Margie J
- Date: 2006
- Language: English
- Type: text , Article
- Identifier: vital:7023 , http://hdl.handle.net/10962/d1007204 , http://dx.doi.org/10.2167/le554.0
- Description: South Africa is a multilingual country with 11 official languages. However, English dominates as the language of access and power and although the Language-in- Education Policy (1997) recommends school language policies that will promote additive bilingualism and the use of learners' home languages as languages of learning and teaching, there has been little implementation of these recommendations by schools. This is despite the fact that the majority of learners do not have the necessary English language proficiency to successfully engage with the curriculum and that teachers frequently are obliged to resort to using the learners' home language to mediate understanding. This research investigates the classroom language practices of six Grade 8 science teachers, teaching science through the medium of English where they and their learners share a common home language, Xhosa. Teachers' lessons were videotaped, transcribed and analysed for the opportunities they offered learners for language development and conceptual challenge. The purpose of the research is to better understand the teachers' perceptions and problems and to be able to draw on examples of good practice, to inform teacher training and to develop a coherent bilingual approach for teaching science through the medium of English as an additional language.
- Full Text:
- Date Issued: 2006
- Authors: Probyn, Margie J
- Date: 2006
- Language: English
- Type: text , Article
- Identifier: vital:7023 , http://hdl.handle.net/10962/d1007204 , http://dx.doi.org/10.2167/le554.0
- Description: South Africa is a multilingual country with 11 official languages. However, English dominates as the language of access and power and although the Language-in- Education Policy (1997) recommends school language policies that will promote additive bilingualism and the use of learners' home languages as languages of learning and teaching, there has been little implementation of these recommendations by schools. This is despite the fact that the majority of learners do not have the necessary English language proficiency to successfully engage with the curriculum and that teachers frequently are obliged to resort to using the learners' home language to mediate understanding. This research investigates the classroom language practices of six Grade 8 science teachers, teaching science through the medium of English where they and their learners share a common home language, Xhosa. Teachers' lessons were videotaped, transcribed and analysed for the opportunities they offered learners for language development and conceptual challenge. The purpose of the research is to better understand the teachers' perceptions and problems and to be able to draw on examples of good practice, to inform teacher training and to develop a coherent bilingual approach for teaching science through the medium of English as an additional language.
- Full Text:
- Date Issued: 2006
Microplastic leachates induce species-specific trait strengthening in intertidal mussels:
- Seuront, Laurent, Nicastro, Katy, McQuaid, Christopher D, Zardi, Gerardo I
- Authors: Seuront, Laurent , Nicastro, Katy , McQuaid, Christopher D , Zardi, Gerardo I
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158200 , vital:40162 , https://0-doi.org.wam.seals.ac.za/10.1002/eap.2222. https://doi.org/10.5061/dryad.905qftthq
- Description: Plastic pollution is ubiquitous with increasing recognition of its direct effects on species’ fitness. Little is known, however, about its more subtle effects, including the influence of plastic pollution on the morphological, functional and behavioural traits of organisms that are central to their ability to withstand disturbances. Among the least obvious but most pernicious forms of plastic-associated pollution are the chemicals that leach from microplastics. Here, we investigate how such leachates influence species’ traits by assessing functional trait compensation across four species of intertidal mussels, through investigations of byssal thread production, movement and aggregation behaviour for mussels held in natural seawater or seawater contaminated by microplastic leachates.
- Full Text:
- Date Issued: 2020
- Authors: Seuront, Laurent , Nicastro, Katy , McQuaid, Christopher D , Zardi, Gerardo I
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158200 , vital:40162 , https://0-doi.org.wam.seals.ac.za/10.1002/eap.2222. https://doi.org/10.5061/dryad.905qftthq
- Description: Plastic pollution is ubiquitous with increasing recognition of its direct effects on species’ fitness. Little is known, however, about its more subtle effects, including the influence of plastic pollution on the morphological, functional and behavioural traits of organisms that are central to their ability to withstand disturbances. Among the least obvious but most pernicious forms of plastic-associated pollution are the chemicals that leach from microplastics. Here, we investigate how such leachates influence species’ traits by assessing functional trait compensation across four species of intertidal mussels, through investigations of byssal thread production, movement and aggregation behaviour for mussels held in natural seawater or seawater contaminated by microplastic leachates.
- Full Text:
- Date Issued: 2020
Demystifying leadership connectivity: rediscovering the soul of leadership
- Authors: Poisat, Paul
- Subjects: Leadership , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/35773 , vital:33811
- Description: INTRODUCTION: A Google search on ‘leadership’ produced 4.2 million articles, books, blogs and webinars on how to become a better leader. Most of the literature, comprising experts and the popular press, abound with formulistic prescriptive steps endorsed by two or three iconic figures that support their regimen. Regardless of the plethora of literature in leadership providing practical and logical tactics, many fall short on implementation and thus result in failure. What numerous sources fail to acknowledge is that the great leaders apply these tactics together with their innate skills to offer clear direction for themselves and their followers. Providing a clear vision and/or strategy to deal with uncertainty and ambiguity is one of the foremost abilities distinguishing leaders in our rapidly changing world and the ability to take employees with them. In addition, various individual (personality, values, cultural, ability) and contextual (nature of the business, complexity, rate of change, work team, diversity) factors may contribute to leadership failure that is characterised by a lack of vision, uncertainty, bullying, management by exclusion, and in extreme cases fraud and corruption. Regardless of the proliferation of leadership literature the world has never been more desperate for sound leadership. We have enough leaders but not enough leadership. With all the literature on leadership, how do you find the essence of leadership?
- Full Text:
- Authors: Poisat, Paul
- Subjects: Leadership , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/35773 , vital:33811
- Description: INTRODUCTION: A Google search on ‘leadership’ produced 4.2 million articles, books, blogs and webinars on how to become a better leader. Most of the literature, comprising experts and the popular press, abound with formulistic prescriptive steps endorsed by two or three iconic figures that support their regimen. Regardless of the plethora of literature in leadership providing practical and logical tactics, many fall short on implementation and thus result in failure. What numerous sources fail to acknowledge is that the great leaders apply these tactics together with their innate skills to offer clear direction for themselves and their followers. Providing a clear vision and/or strategy to deal with uncertainty and ambiguity is one of the foremost abilities distinguishing leaders in our rapidly changing world and the ability to take employees with them. In addition, various individual (personality, values, cultural, ability) and contextual (nature of the business, complexity, rate of change, work team, diversity) factors may contribute to leadership failure that is characterised by a lack of vision, uncertainty, bullying, management by exclusion, and in extreme cases fraud and corruption. Regardless of the proliferation of leadership literature the world has never been more desperate for sound leadership. We have enough leaders but not enough leadership. With all the literature on leadership, how do you find the essence of leadership?
- Full Text:
Towards a norm in South African Englishes: the case for Xhosa English
- Authors: De Klerk, Vivian A
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6131 , http://hdl.handle.net/10962/d1011583
- Description: Black South African English (BSAE) is generally regarded today as the variety of English commonly used by mother-tongue speakers of South Africa's indigenous African languages in areas where English is not the language of the majority. Its roots lie in the history of the teaching of English to the black people of this country, where the role models who teach English are second language learners themselves. To date, BSAE has mainly been studied within an applied linguistic framework with emphasis on its character as a second language which is deviant from standard English. An alternative view is to see it as a variety in its own right, a new or world English (Coetsee Van Rooy and Verhoef, 2000; van der Walt and van Rooy, 2002). As a consequence, a new look at norms is becoming increasingly necessary, so that decisions about learners' language competence can be made in terms of this variety. This paper reports on preliminary analyses of a recently collected corpus of Xhosa English (XE) (a sub-category of BSAE) which consists of naturalistic spoken data, and comprises some 540,000 words of Xhosa English. This large database enables empirical analysis of actual patterns of use in language, making it possible to test earlier speculations which have been based on intuition, and to explore the possibility of systematic differences in the patterns of structure and use in this particular variety. The paper focuses on 20 separate linguistic characteristics, most of which have been previously identified in the literature as being features of BSAE, and analyses each of them in turn, in order to ascertain their usage patterns and frequency of occurrence in the corpus.
- Full Text:
- Date Issued: 2003
- Authors: De Klerk, Vivian A
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6131 , http://hdl.handle.net/10962/d1011583
- Description: Black South African English (BSAE) is generally regarded today as the variety of English commonly used by mother-tongue speakers of South Africa's indigenous African languages in areas where English is not the language of the majority. Its roots lie in the history of the teaching of English to the black people of this country, where the role models who teach English are second language learners themselves. To date, BSAE has mainly been studied within an applied linguistic framework with emphasis on its character as a second language which is deviant from standard English. An alternative view is to see it as a variety in its own right, a new or world English (Coetsee Van Rooy and Verhoef, 2000; van der Walt and van Rooy, 2002). As a consequence, a new look at norms is becoming increasingly necessary, so that decisions about learners' language competence can be made in terms of this variety. This paper reports on preliminary analyses of a recently collected corpus of Xhosa English (XE) (a sub-category of BSAE) which consists of naturalistic spoken data, and comprises some 540,000 words of Xhosa English. This large database enables empirical analysis of actual patterns of use in language, making it possible to test earlier speculations which have been based on intuition, and to explore the possibility of systematic differences in the patterns of structure and use in this particular variety. The paper focuses on 20 separate linguistic characteristics, most of which have been previously identified in the literature as being features of BSAE, and analyses each of them in turn, in order to ascertain their usage patterns and frequency of occurrence in the corpus.
- Full Text:
- Date Issued: 2003
The compilation of multilingual concept literacy glossaries at the University of Cape Town: a lexicographical function theoretical approach
- Nkomo, Dion, Madiba, Mbulungeni
- Authors: Nkomo, Dion , Madiba, Mbulungeni
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67548 , vital:29110 , http://dx.doi.org/10.5788/27-1-1411
- Description: Publisher version , This article proposes a lexicographical approach to the compilation of multilingual concept literacy glossaries which may play a very important role in supporting students at institutions of higher education. In order to support concept literacy, especially for students for whom English is not the native language, a number of universities in South Africa are compiling multilingual glossaries through which the use of languages other than English may be employed as auxiliary media. Terminologies in languages other than English are developed by translating English terms or coining new terms in these languages to exploit the native language competence of most students. The glossary project at the University of Cape Town (UCT) which was conceived under the auspices of the Multilingualism Education Project (MEP) is discussed. It is shown that the UCT glossaries are compiled using methods consistent with those employed in modern lexicography or proffered in lexicographical theory. The lexicographical function theory is specifically used to account for the glossaries and their production. It is suggested that modern lexicography can provide useful guidance for the production of glossaries, given that the earliest glossaries constitute the humble beginnings of lexicography.
- Full Text:
- Date Issued: 2011
- Authors: Nkomo, Dion , Madiba, Mbulungeni
- Date: 2011
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67548 , vital:29110 , http://dx.doi.org/10.5788/27-1-1411
- Description: Publisher version , This article proposes a lexicographical approach to the compilation of multilingual concept literacy glossaries which may play a very important role in supporting students at institutions of higher education. In order to support concept literacy, especially for students for whom English is not the native language, a number of universities in South Africa are compiling multilingual glossaries through which the use of languages other than English may be employed as auxiliary media. Terminologies in languages other than English are developed by translating English terms or coining new terms in these languages to exploit the native language competence of most students. The glossary project at the University of Cape Town (UCT) which was conceived under the auspices of the Multilingualism Education Project (MEP) is discussed. It is shown that the UCT glossaries are compiled using methods consistent with those employed in modern lexicography or proffered in lexicographical theory. The lexicographical function theory is specifically used to account for the glossaries and their production. It is suggested that modern lexicography can provide useful guidance for the production of glossaries, given that the earliest glossaries constitute the humble beginnings of lexicography.
- Full Text:
- Date Issued: 2011
Think: A Review of International Struggles
- Date: 1998-01
- 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/10948/33823 , vital:33086 , Bulk File 7
- Description: 'Think' is a journal related to the Unity Movement. The author is Hosea Jaffe a long-standing NEUM theoretician who went into exile in the 1960s but remained an active member.
- Full Text: false
- Date Issued: 1998-01
- Date: 1998-01
- 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/10948/33823 , vital:33086 , Bulk File 7
- Description: 'Think' is a journal related to the Unity Movement. The author is Hosea Jaffe a long-standing NEUM theoretician who went into exile in the 1960s but remained an active member.
- Full Text: false
- Date Issued: 1998-01
Impact of climate change and development scenarios on flow patterns in the Okavango River
- Andersson, L, Wilk, J, Todd, M C, Hughes, Denis A, Earle, A, Kniveton, D, Layberry, R, Savenije, H H G
- Authors: Andersson, L , Wilk, J , Todd, M C , Hughes, Denis A , Earle, A , Kniveton, D , Layberry, R , Savenije, H H G
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:7086 , http://hdl.handle.net/10962/d1012346
- Description: This paper lays the foundation for the use of scenario modelling as a tool for integrated water resource management in the Okavango River basin. The Pitman hydrological model is used to assess the impact of various development and climate change scenarios on downstream river flow. The simulated impact on modelled river discharge of increased water use for domestic use, livestock, and informal irrigation (proportional to expected population increase) is very limited. Implementation of all likely potential formal irrigation schemes mentioned in available reports is expected to decrease the annual flow by 2% and the minimum monthly flow by 5%. The maximum possible impact of irrigation on annual average flow is estimated as 8%, with a reduction of minimum monthly flow by 17%. Deforestation of all areas within a 1 km buffer around the rivers is estimated to increase the flow by 6%. However, construction of all potential hydropower reservoirs in the basin may change the monthly mean flow distribution dramatically, although under the assumed operational rules, the impact of the dams is only substantial during wet years. The simulated impacts of climate change are considerable larger that those of the development scenarios (with exception of the high development scenario of hydropower schemes) although the results are sensitive to the choice of GCM and the IPCC SRES greenhouse gas (GHG) emission scenarios. The annual mean water flow predictions for the period 2020–2050 averaged over scenarios from all the four GCMs used in this study are close to the present situation for both the A2 and B2 GHG scenarios. For the 2050–2080 and 2070–2099 periods the all-GCM mean shows a flow decrease of 20% (14%) and 26% (17%), respectively, for the A2 (B2) GHG scenarios. However, the uncertainty in the magnitude of simulated future changes remains high. The simulated effect of climate change on minimum monthly flow is proportionally higher than the impact on the annual mean flow.
- Full Text:
- Date Issued: 2006
- Authors: Andersson, L , Wilk, J , Todd, M C , Hughes, Denis A , Earle, A , Kniveton, D , Layberry, R , Savenije, H H G
- Date: 2006
- Language: English
- Type: Article
- Identifier: vital:7086 , http://hdl.handle.net/10962/d1012346
- Description: This paper lays the foundation for the use of scenario modelling as a tool for integrated water resource management in the Okavango River basin. The Pitman hydrological model is used to assess the impact of various development and climate change scenarios on downstream river flow. The simulated impact on modelled river discharge of increased water use for domestic use, livestock, and informal irrigation (proportional to expected population increase) is very limited. Implementation of all likely potential formal irrigation schemes mentioned in available reports is expected to decrease the annual flow by 2% and the minimum monthly flow by 5%. The maximum possible impact of irrigation on annual average flow is estimated as 8%, with a reduction of minimum monthly flow by 17%. Deforestation of all areas within a 1 km buffer around the rivers is estimated to increase the flow by 6%. However, construction of all potential hydropower reservoirs in the basin may change the monthly mean flow distribution dramatically, although under the assumed operational rules, the impact of the dams is only substantial during wet years. The simulated impacts of climate change are considerable larger that those of the development scenarios (with exception of the high development scenario of hydropower schemes) although the results are sensitive to the choice of GCM and the IPCC SRES greenhouse gas (GHG) emission scenarios. The annual mean water flow predictions for the period 2020–2050 averaged over scenarios from all the four GCMs used in this study are close to the present situation for both the A2 and B2 GHG scenarios. For the 2050–2080 and 2070–2099 periods the all-GCM mean shows a flow decrease of 20% (14%) and 26% (17%), respectively, for the A2 (B2) GHG scenarios. However, the uncertainty in the magnitude of simulated future changes remains high. The simulated effect of climate change on minimum monthly flow is proportionally higher than the impact on the annual mean flow.
- Full Text:
- Date Issued: 2006
Sex work: discussion document 27-29 March 2012
- Congress of South African Trade Unions (COSATU)
- Authors: Congress of South African Trade Unions (COSATU)
- Date: 2012
- Subjects: Uncatalogued
- Language: English
- Type: book , text
- Identifier: http://hdl.handle.net/10962/68748 , vital:29311
- Description: The aim of this paper is to resuscitate the debate on the need for decriminalization of sex work and ensure that COSATU and its affiliates further engage within structures, alliance, non -governmental organizations and with the Government in terms of the need for law reform and identify alternative policy framework. However, whatever outcome of the legal processes pertaining to sex work, should be abide by the spirit of the Constitution which is committed to advancing human rights and social justice. Sex work in South Africa is currently criminalised and is restricted by the Sexual Offences Act of 1957 (an un-amended apartheid-era law) which prohibits all activities associated with it. The criminal offences related to sex work include amongst them the keeping or participating in the management of a brothel, procuring someone to become a sex worker, soliciting or selling sex or living of the earnings of a sex worker. In 2007 through the Sexual Offences Act their clients were also criminalised In 2007, the Act was amended to criminalise buyers of sexual services too (SALRC 2009). We therefore argue that the existing laws on sex work are nothing but hypocrisy of the conservatives and elites. They do not improve the conditions of women; instead they worsen the miserable conditions that women in the sex trade already find themselves in. The missing fact is that sex work is a by-product of our patriarchal capitalist society-not something created by some “immoral prostitute” The current oppressive legislation on sex work has stimulated a lot of debates and has led to an upsurge in advocacy work by individuals and organizations around the need to either legalise or decriminalize sex work. Likewise, Cosatu as a key civil society player has also played a leading role in its endeavor to unite the working class and to defend workers from exploitation as well as finding workable solutions to the plight of the most vulnerable people in our society who find themselves with no choice but to engage in sex work. The sex industry is by nature exploitative and inherently dangerous. Women in the industry experience different degrees of abuse, coercion and violence, but all of them are harmed physically and psychologically. As a trade union movement, COSATU has an interest in the debate about sex work, from the point of view that sex work targets mainly the working class and the poor, predominantly black women. High levels of unemployment, poverty and gender inequality are key factors driving sex work. The global economic crisis has aggravated the situation for the poor majority through job losses, casualisation and ultimately increased feminization of poverty. Cosatu has already started some debates and campaigns aimed at devising ways of protecting sex workers through collective workers struggles. As such, the sex work discourse and campaign among Cosatu affiliates for decriminalization was tabled at the Federation’s 10th Congress though it was deferred because of contestation and opposition amongst delegates. However, affiliates had the responsibility to go back and make further consultations, sensitization with their structures and open up a discussion at the level of the COSATU Central Executive Committee. Indeed, it is high time that the debate on decriminalization should be concluded and that sex work be recognized as work as Arnott and Crago (2009) argue that: “The criminalisation of sex work has precluded the enforcement and protection of sex workers’ Labour rights. This disregard for sex workers as workers has left many of those employed in brothels in South Africa vulnerable to labor abuses such as withheld wages, arbitrary fines, restrictions on mobility, and confiscation of belongings including medication. Sex workers on the street or working in brothels and other agencies have no recourse if customers refuse to pay them’’1 The decriminalization of sex work should take the course of a rights- based approach which means that sex workers would be able to enjoy their basic human & labour rights and be protected against sexual harassment, violence, rape and unfair working conditions. By so doing, sex workers would be able to access non-discriminatory health care services, be more empowered and operate within the ambit of protective labour and occupational health & safety laws.
- Full Text:
- Date Issued: 2012
- Authors: Congress of South African Trade Unions (COSATU)
- Date: 2012
- Subjects: Uncatalogued
- Language: English
- Type: book , text
- Identifier: http://hdl.handle.net/10962/68748 , vital:29311
- Description: The aim of this paper is to resuscitate the debate on the need for decriminalization of sex work and ensure that COSATU and its affiliates further engage within structures, alliance, non -governmental organizations and with the Government in terms of the need for law reform and identify alternative policy framework. However, whatever outcome of the legal processes pertaining to sex work, should be abide by the spirit of the Constitution which is committed to advancing human rights and social justice. Sex work in South Africa is currently criminalised and is restricted by the Sexual Offences Act of 1957 (an un-amended apartheid-era law) which prohibits all activities associated with it. The criminal offences related to sex work include amongst them the keeping or participating in the management of a brothel, procuring someone to become a sex worker, soliciting or selling sex or living of the earnings of a sex worker. In 2007 through the Sexual Offences Act their clients were also criminalised In 2007, the Act was amended to criminalise buyers of sexual services too (SALRC 2009). We therefore argue that the existing laws on sex work are nothing but hypocrisy of the conservatives and elites. They do not improve the conditions of women; instead they worsen the miserable conditions that women in the sex trade already find themselves in. The missing fact is that sex work is a by-product of our patriarchal capitalist society-not something created by some “immoral prostitute” The current oppressive legislation on sex work has stimulated a lot of debates and has led to an upsurge in advocacy work by individuals and organizations around the need to either legalise or decriminalize sex work. Likewise, Cosatu as a key civil society player has also played a leading role in its endeavor to unite the working class and to defend workers from exploitation as well as finding workable solutions to the plight of the most vulnerable people in our society who find themselves with no choice but to engage in sex work. The sex industry is by nature exploitative and inherently dangerous. Women in the industry experience different degrees of abuse, coercion and violence, but all of them are harmed physically and psychologically. As a trade union movement, COSATU has an interest in the debate about sex work, from the point of view that sex work targets mainly the working class and the poor, predominantly black women. High levels of unemployment, poverty and gender inequality are key factors driving sex work. The global economic crisis has aggravated the situation for the poor majority through job losses, casualisation and ultimately increased feminization of poverty. Cosatu has already started some debates and campaigns aimed at devising ways of protecting sex workers through collective workers struggles. As such, the sex work discourse and campaign among Cosatu affiliates for decriminalization was tabled at the Federation’s 10th Congress though it was deferred because of contestation and opposition amongst delegates. However, affiliates had the responsibility to go back and make further consultations, sensitization with their structures and open up a discussion at the level of the COSATU Central Executive Committee. Indeed, it is high time that the debate on decriminalization should be concluded and that sex work be recognized as work as Arnott and Crago (2009) argue that: “The criminalisation of sex work has precluded the enforcement and protection of sex workers’ Labour rights. This disregard for sex workers as workers has left many of those employed in brothels in South Africa vulnerable to labor abuses such as withheld wages, arbitrary fines, restrictions on mobility, and confiscation of belongings including medication. Sex workers on the street or working in brothels and other agencies have no recourse if customers refuse to pay them’’1 The decriminalization of sex work should take the course of a rights- based approach which means that sex workers would be able to enjoy their basic human & labour rights and be protected against sexual harassment, violence, rape and unfair working conditions. By so doing, sex workers would be able to access non-discriminatory health care services, be more empowered and operate within the ambit of protective labour and occupational health & safety laws.
- Full Text:
- Date Issued: 2012
Introduction to Psychology 2: PSY 121F
- Authors: Kheswa, J G , Van Niekerk, R
- Date: 2011-05
- Language: English
- Type: Examination paper
- Identifier: vital:18037 , http://hdl.handle.net/10353/d1010621
- Description: Introduction to Psychology 2: PSY 121F, degree examination May/June 2011.
- Full Text: false
- Date Issued: 2011-05
- Authors: Kheswa, J G , Van Niekerk, R
- Date: 2011-05
- Language: English
- Type: Examination paper
- Identifier: vital:18037 , http://hdl.handle.net/10353/d1010621
- Description: Introduction to Psychology 2: PSY 121F, degree examination May/June 2011.
- Full Text: false
- Date Issued: 2011-05
Understanding the Pyrimethamine drug resistance mechanism via combined molecular dynamics and dynamic residue network analysis:
- Amusengeri, Arnold, Tata, Rolland B, Tastan Bishop, Özlem
- Authors: Amusengeri, Arnold , Tata, Rolland B , Tastan Bishop, Özlem
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/163022 , vital:41005 , https://doi.org/10.3390/molecules25040904
- Description: In this era of precision medicine, insights into the resistance mechanism of drugs are integral for the development of potent therapeutics. Here, we sought to understand the contribution of four point mutations (N51I, C59R, S108N, and I164L) within the active site of the malaria parasite enzyme dihydrofolate reductase (DHFR) towards the resistance of the antimalarial drug pyrimethamine. Homology modeling was used to obtain full-length models of wild type (WT) and mutant DHFR. Molecular docking was employed to dock pyrimethamine onto the generated structures. Subsequent all-atom molecular dynamics (MD) simulations and binding free-energy computations highlighted that pyrimethamine’s stability and affinity inversely relates to the number of mutations within its binding site and, hence, resistance severity.
- Full Text:
- Date Issued: 2020
- Authors: Amusengeri, Arnold , Tata, Rolland B , Tastan Bishop, Özlem
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/163022 , vital:41005 , https://doi.org/10.3390/molecules25040904
- Description: In this era of precision medicine, insights into the resistance mechanism of drugs are integral for the development of potent therapeutics. Here, we sought to understand the contribution of four point mutations (N51I, C59R, S108N, and I164L) within the active site of the malaria parasite enzyme dihydrofolate reductase (DHFR) towards the resistance of the antimalarial drug pyrimethamine. Homology modeling was used to obtain full-length models of wild type (WT) and mutant DHFR. Molecular docking was employed to dock pyrimethamine onto the generated structures. Subsequent all-atom molecular dynamics (MD) simulations and binding free-energy computations highlighted that pyrimethamine’s stability and affinity inversely relates to the number of mutations within its binding site and, hence, resistance severity.
- Full Text:
- Date Issued: 2020
NUM Education strategic plan
- NUM
- Authors: NUM
- Date: 2001
- Subjects: Uncatalogued
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/106445 , vital:32652
- Description: First we need to ask the obvious question, what is the purpose of a trade union education strategic plan? The answer is as follows,To enable the union to locate its educational concerns and plan its responses with due regard to available resources, and capacity. To ensure that there is a reference point for a thorough on-going assessment of progress. To help articulate a vision for the unions education which inspires and motivates all those concerned. This is critical to the long-term success of our union. Assessing and adopting strategic options requires a vision to help us locate and then analyse both external and internal conditions. It helps us to formulate manageable and realistic strategies to achieve agreed objectives. It helps us to implement our plans with a clear appreciation of our true capacity and to measure outcomes accurately
- Full Text:
- Date Issued: 2001
- Authors: NUM
- Date: 2001
- Subjects: Uncatalogued
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/106445 , vital:32652
- Description: First we need to ask the obvious question, what is the purpose of a trade union education strategic plan? The answer is as follows,To enable the union to locate its educational concerns and plan its responses with due regard to available resources, and capacity. To ensure that there is a reference point for a thorough on-going assessment of progress. To help articulate a vision for the unions education which inspires and motivates all those concerned. This is critical to the long-term success of our union. Assessing and adopting strategic options requires a vision to help us locate and then analyse both external and internal conditions. It helps us to formulate manageable and realistic strategies to achieve agreed objectives. It helps us to implement our plans with a clear appreciation of our true capacity and to measure outcomes accurately
- Full Text:
- Date Issued: 2001