Human impacts on hydrological health and the provision of ecosystemservices: a case study of the eMthonjeni–Fairview Spring Wetland, Grahamstown, South Africa
- Sinchembe, M, Ellery, William F N
- Authors: Sinchembe, M , Ellery, William F N
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144343 , vital:38337 , DOI: 10.2989/16085914.2010.538508
- Description: Wetland hydrological health and the provision of indirect ecosystem services in the eMthonjeni–Fairview Spring Wetland, Grahamstown, South Africa, were assessed in 2008, using the newly developed wetland assessment tools WET-Health and WET-EcoServices. Variation in health and ecosystem services were assessed over time, based on aerial photograph interpretation and the use of the score sheets in these assessment tools. Hydrological health and indirect ecosystem services of the wetland have been altered since 1949, due to human activities both in the catchment and the wetland. The most significant human intervention on the wetland's hydrological health was the result of road construction and invasion by alien plants. Water use by local residents had an unmeasurable effect on hydrological health. Wetland health is related to the provision of wetland ecosystem services, and cumulative impacts in the catchment and wetland have reduced the provision of many indirect wetland ecosystem services.
- Full Text:
- Date Issued: 2010
- Authors: Sinchembe, M , Ellery, William F N
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144343 , vital:38337 , DOI: 10.2989/16085914.2010.538508
- Description: Wetland hydrological health and the provision of indirect ecosystem services in the eMthonjeni–Fairview Spring Wetland, Grahamstown, South Africa, were assessed in 2008, using the newly developed wetland assessment tools WET-Health and WET-EcoServices. Variation in health and ecosystem services were assessed over time, based on aerial photograph interpretation and the use of the score sheets in these assessment tools. Hydrological health and indirect ecosystem services of the wetland have been altered since 1949, due to human activities both in the catchment and the wetland. The most significant human intervention on the wetland's hydrological health was the result of road construction and invasion by alien plants. Water use by local residents had an unmeasurable effect on hydrological health. Wetland health is related to the provision of wetland ecosystem services, and cumulative impacts in the catchment and wetland have reduced the provision of many indirect wetland ecosystem services.
- Full Text:
- Date Issued: 2010
I remember having mac and cheese at my gran’s house:
- Authors: Rennie, Gillian
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159471 , vital:40300 , https://hdl.handle.net/10520/EJC139376
- Description: In a tutorial entitled The evolution of MEdia, writing and editing lecturer Gillian Rennie introduced Rhodes University first-year journalism and media studies students to Denis Hirson's I Remember King Kong (the boxer) and asked them to write their own I Remember, focusing on their personal relationships with the media. This is the edited result of a collective exercise in recollection by 270 students.
- Full Text:
- Date Issued: 2010
- Authors: Rennie, Gillian
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159471 , vital:40300 , https://hdl.handle.net/10520/EJC139376
- Description: In a tutorial entitled The evolution of MEdia, writing and editing lecturer Gillian Rennie introduced Rhodes University first-year journalism and media studies students to Denis Hirson's I Remember King Kong (the boxer) and asked them to write their own I Remember, focusing on their personal relationships with the media. This is the edited result of a collective exercise in recollection by 270 students.
- Full Text:
- Date Issued: 2010
Identifying annotations for adventure game generation from fiction text
- Berkland, Ross, Bangay, Shaun D
- Authors: Berkland, Ross , Bangay, Shaun D
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433366 , vital:72965 , https://doi.org/10.1145/1899503.1899506
- Description: Recent advancements in Text-to-Scene research have lead to the devel-opment of systems which automatically extract key concepts from the text of a fiction book and generate computer animated movies depicting the sto-ry. Extracting such annotations from raw fiction text is a laborious process and so in this work we evaluate appropriate candidates to serve as the basis for the required annotations for generating interactive virtual worlds. We val-idate our choice by generating adventure games: interactive virtual worlds which create a stylized representation of the environment described in the text, populate it with characters related to the story and define game goals related to the plot of the fiction story. Our prototype produces a fully playa-ble game, making use of an existing open-source game engine. The pro-cess is evaluated using user tests in which participants are asked to meas-ure the accuracy with which the game represents the events, characters and goals described in the story. The response indicates that the chosen an-notation set is sufficient to define a game that is a plausibly acceptable rep-resentation of the text.
- Full Text:
- Date Issued: 2010
- Authors: Berkland, Ross , Bangay, Shaun D
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433366 , vital:72965 , https://doi.org/10.1145/1899503.1899506
- Description: Recent advancements in Text-to-Scene research have lead to the devel-opment of systems which automatically extract key concepts from the text of a fiction book and generate computer animated movies depicting the sto-ry. Extracting such annotations from raw fiction text is a laborious process and so in this work we evaluate appropriate candidates to serve as the basis for the required annotations for generating interactive virtual worlds. We val-idate our choice by generating adventure games: interactive virtual worlds which create a stylized representation of the environment described in the text, populate it with characters related to the story and define game goals related to the plot of the fiction story. Our prototype produces a fully playa-ble game, making use of an existing open-source game engine. The pro-cess is evaluated using user tests in which participants are asked to meas-ure the accuracy with which the game represents the events, characters and goals described in the story. The response indicates that the chosen an-notation set is sufficient to define a game that is a plausibly acceptable rep-resentation of the text.
- Full Text:
- Date Issued: 2010
In search of critical engagement: a history of South African university based journalism
- du Toit, Jeanne, de Beer, Arnold S
- Authors: du Toit, Jeanne , de Beer, Arnold S
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159453 , vital:40299 , https://hdl.handle.net/10520/EJC139372
- Description: Historical discussions of South African journalism education (Tomaselli 1991: 167; De Beer and Tomaselli 2000; Steenveld 2006) refer to examples of teaching practice which have served as critical interventions into political process. They occur primarily in the late 1970s and 1980s and it is arguable that the social circumstances that existed during this period presented unique opportunities for critical education. The literature suggests, however, that these examples represent the exception rather than the rule. It would seem, in fact, that a critical approach to journalism education has never been realised in South Africa in any substantive way. It is with this argument in mind that I explore, in this paper, the historical construction of journalism as a subject of university education in South Africa.
- Full Text:
- Date Issued: 2010
- Authors: du Toit, Jeanne , de Beer, Arnold S
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159453 , vital:40299 , https://hdl.handle.net/10520/EJC139372
- Description: Historical discussions of South African journalism education (Tomaselli 1991: 167; De Beer and Tomaselli 2000; Steenveld 2006) refer to examples of teaching practice which have served as critical interventions into political process. They occur primarily in the late 1970s and 1980s and it is arguable that the social circumstances that existed during this period presented unique opportunities for critical education. The literature suggests, however, that these examples represent the exception rather than the rule. It would seem, in fact, that a critical approach to journalism education has never been realised in South Africa in any substantive way. It is with this argument in mind that I explore, in this paper, the historical construction of journalism as a subject of university education in South Africa.
- Full Text:
- Date Issued: 2010
Indicators of sustainable fishing for South African sardine Sardinops sagax and anchovy Engraulis encrasicolus
- Fairweather, T P, Van der Lingen, C D, Booth, Anthony J, Drapeau, L, Van Der Westhuizen, J J
- Authors: Fairweather, T P , Van der Lingen, C D , Booth, Anthony J , Drapeau, L , Van Der Westhuizen, J J
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124778 , vital:35691 , https://doi.10.2989/18142320609504215
- Description: Six indicators were investigated for South African sardine Sardinops sagax and anchovy Engraulis encrasicolus: mean length of catch, length-at-50% maturity, total mortality, exploitation rate, ratio of bycatch, and centre of gravity of commercial catches. Sardine length-at-50% maturity is the most promising as a descriptive indicator because it is positively correlated with population size for an extensive time period (1953–2005). The remaining indicators were limited by shorter data-series (1984–2005). However, mean length of catch, ratio of bycatch and exploitation rate were found to be useful when considered in conjunction with other indicators. The centre of gravity of commercial sardine catches has shown a significant eastward shift from the West Coast, whereas that of anchovy has remained off that coast. Ratio of bycatch indicates that school composition is a reliable descriptive indicator of relative abundance in the two species. Fewer indicators for anchovy were useful, which is attributed to this species’ flexible life-history pattern.
- Full Text:
- Date Issued: 2010
- Authors: Fairweather, T P , Van der Lingen, C D , Booth, Anthony J , Drapeau, L , Van Der Westhuizen, J J
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124778 , vital:35691 , https://doi.10.2989/18142320609504215
- Description: Six indicators were investigated for South African sardine Sardinops sagax and anchovy Engraulis encrasicolus: mean length of catch, length-at-50% maturity, total mortality, exploitation rate, ratio of bycatch, and centre of gravity of commercial catches. Sardine length-at-50% maturity is the most promising as a descriptive indicator because it is positively correlated with population size for an extensive time period (1953–2005). The remaining indicators were limited by shorter data-series (1984–2005). However, mean length of catch, ratio of bycatch and exploitation rate were found to be useful when considered in conjunction with other indicators. The centre of gravity of commercial sardine catches has shown a significant eastward shift from the West Coast, whereas that of anchovy has remained off that coast. Ratio of bycatch indicates that school composition is a reliable descriptive indicator of relative abundance in the two species. Fewer indicators for anchovy were useful, which is attributed to this species’ flexible life-history pattern.
- Full Text:
- Date Issued: 2010
Infusing service learning in curricula: a theoretical exploration of infusion possibilities
- Authors: Hlengwa, Amanda I
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70765 , vital:29727
- Description: In South Africa one result of the appeal for greater social responsiveness from Higher Education institutions has been for service-learning, a component of Community Engagement, to be infused into curricula in higher education. This paper suggests that infusion of service-learning into curricula is based on broad assumptions which need to be researched further. There are complexities which need to be considered regarding the potential of service-learning to bridge the gap between the university and society, and the extent to which it is the most appropriate pedagogic tool for this purpose. This paper argues that Basil Bernstein’s theory of classification and framing as well as his work on vertical and horizontal discourses is potentially useful for understanding the factors that could impact on infusing service-learning into curricula. Thus, the potential of Bernstein’s work to provide insights into the possibilities and constraints of infusing service-learning into the curricula is explored.
- Full Text:
- Date Issued: 2010
- Authors: Hlengwa, Amanda I
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70765 , vital:29727
- Description: In South Africa one result of the appeal for greater social responsiveness from Higher Education institutions has been for service-learning, a component of Community Engagement, to be infused into curricula in higher education. This paper suggests that infusion of service-learning into curricula is based on broad assumptions which need to be researched further. There are complexities which need to be considered regarding the potential of service-learning to bridge the gap between the university and society, and the extent to which it is the most appropriate pedagogic tool for this purpose. This paper argues that Basil Bernstein’s theory of classification and framing as well as his work on vertical and horizontal discourses is potentially useful for understanding the factors that could impact on infusing service-learning into curricula. Thus, the potential of Bernstein’s work to provide insights into the possibilities and constraints of infusing service-learning into the curricula is explored.
- Full Text:
- Date Issued: 2010
Institutionalising service-learning
- Authors: Hlengwa, Amanda I
- Date: 2010
- Language: English
- Type: text , article
- Identifier: vital:29685 , http://hdl.handle.net/10520/EJC131578
- Description: Higher education has three core pillars: teaching, research and community engagement. Teaching and research endeavours have dominated university agendas. However, momentum in prioritising community engagement is growing. The developing emphasis placed on the third pillar raises an opportunity to investigate how community engagement is conceptualised and therefore prioritised within the higher education landscape. Community engagement is expressed as a continuum in higher education inclusive of five overlapping activities of which service-learning is just one. This paper outlines what service-learning is and its potential role in the transformation of higher education, as well as to signal the importance of institutional commitment to service-learning. Lastly, the paper offers a synthesis of the available literature on how to implement successfully service-learning modules.
- Full Text:
- Date Issued: 2010
- Authors: Hlengwa, Amanda I
- Date: 2010
- Language: English
- Type: text , article
- Identifier: vital:29685 , http://hdl.handle.net/10520/EJC131578
- Description: Higher education has three core pillars: teaching, research and community engagement. Teaching and research endeavours have dominated university agendas. However, momentum in prioritising community engagement is growing. The developing emphasis placed on the third pillar raises an opportunity to investigate how community engagement is conceptualised and therefore prioritised within the higher education landscape. Community engagement is expressed as a continuum in higher education inclusive of five overlapping activities of which service-learning is just one. This paper outlines what service-learning is and its potential role in the transformation of higher education, as well as to signal the importance of institutional commitment to service-learning. Lastly, the paper offers a synthesis of the available literature on how to implement successfully service-learning modules.
- Full Text:
- Date Issued: 2010
Institutions and economic research: a case of location externalities on agricultural resource allocation in the Kat River basin, South Africa
- Mbatha, Cyril N, Antrobus, Geoffrey G
- Authors: Mbatha, Cyril N , Antrobus, Geoffrey G
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142991 , vital:38183 , DOI: 10.1080/03031853.2013.798069
- Description: The Physical Externality Model is used to illustrate the potential limitations of blindly adopting formal models for economic investigation and explanation in varied geographical contexts. As argued by institutional economists for the last hundred years the practice limits the value and relevance of most general economic inquiry. This model postulates that the geographical location of farmers along a given watercourse, in which water is diverted individually, leads to structural inefficiencies that negatively affect the whole farming community. These effects are felt more severely at downstream sites and lead to a status quo where upstream farmers possess relative economic and political advantages over their counterparts elsewhere. In the study of the Kat River basin these predictions appear to be true only in as far as they relate to legal and political allocations and use of water resources.
- Full Text:
- Date Issued: 2010
- Authors: Mbatha, Cyril N , Antrobus, Geoffrey G
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142991 , vital:38183 , DOI: 10.1080/03031853.2013.798069
- Description: The Physical Externality Model is used to illustrate the potential limitations of blindly adopting formal models for economic investigation and explanation in varied geographical contexts. As argued by institutional economists for the last hundred years the practice limits the value and relevance of most general economic inquiry. This model postulates that the geographical location of farmers along a given watercourse, in which water is diverted individually, leads to structural inefficiencies that negatively affect the whole farming community. These effects are felt more severely at downstream sites and lead to a status quo where upstream farmers possess relative economic and political advantages over their counterparts elsewhere. In the study of the Kat River basin these predictions appear to be true only in as far as they relate to legal and political allocations and use of water resources.
- Full Text:
- Date Issued: 2010
Interaction between nickel hydroxy phthalocyanine derivatives with p-chlorophenol
- Khene, Samson, Lobb, Kevin, Nyokong, Tebello
- Authors: Khene, Samson , Lobb, Kevin , Nyokong, Tebello
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/248461 , vital:51688 , xlink:href="https://doi.org/10.1016/j.electacta.2010.10.007"
- Description: In this work the interaction between peripherally (β) substituted nickel tetrahydroxyphthalocyanines (β-NiPc(OH)4 and β-Ni(O)Pc(OH)4) with p-chlorophenol is theoretically rationalised by performing calculations at B3LYP/6-31G(d) level. Density functional theory (DFT) and molecular orbital theory are used to calculate the condensed Fukui function for phthalocyanine derivatives and p-chlorophenol, in order to determine the reactive sites involved when p-chlorophenol is oxidized, and to compare theoretically predicted reactivity to experimentally determined electrocatalytic activity. Electrocatalytic activities of adsorbed NiPc derivatives: ads-α-NiPc(OH)8-OPGE (OPGE = ordinary poly graphite electrode), ads-α-NiPc(OH)4-OPGE and ads-β-NiPc(OH)4-OPGE are compared with those of the polymerized counterparts: poly-α-Ni(O)Pc(OH)8-OPGE, poly-α-NiPc(OH)4-OPGE and poly-β-NiPc(OH)4-OPGE, respectively.
- Full Text:
- Date Issued: 2010
- Authors: Khene, Samson , Lobb, Kevin , Nyokong, Tebello
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/248461 , vital:51688 , xlink:href="https://doi.org/10.1016/j.electacta.2010.10.007"
- Description: In this work the interaction between peripherally (β) substituted nickel tetrahydroxyphthalocyanines (β-NiPc(OH)4 and β-Ni(O)Pc(OH)4) with p-chlorophenol is theoretically rationalised by performing calculations at B3LYP/6-31G(d) level. Density functional theory (DFT) and molecular orbital theory are used to calculate the condensed Fukui function for phthalocyanine derivatives and p-chlorophenol, in order to determine the reactive sites involved when p-chlorophenol is oxidized, and to compare theoretically predicted reactivity to experimentally determined electrocatalytic activity. Electrocatalytic activities of adsorbed NiPc derivatives: ads-α-NiPc(OH)8-OPGE (OPGE = ordinary poly graphite electrode), ads-α-NiPc(OH)4-OPGE and ads-β-NiPc(OH)4-OPGE are compared with those of the polymerized counterparts: poly-α-Ni(O)Pc(OH)8-OPGE, poly-α-NiPc(OH)4-OPGE and poly-β-NiPc(OH)4-OPGE, respectively.
- Full Text:
- Date Issued: 2010
Introducing a learning management system in a large first year class: impact on lecturers and students
- Snowball, Jeanette D, Mostert, Markus
- Authors: Snowball, Jeanette D , Mostert, Markus
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68631 , vital:29297 , https://hdl.handle.net/10520/EJC37639
- Description: Publisher version , The challenges of teaching large classes are well documented in the literature on teaching in higher education. Information and communication technologies (ICTs) have the potential to address some of these challenges, but, used inappropriately, technology can perpetuate entrenched practices and simply support performance models of teaching that encourage transmission approaches to learning. This article reports on the impact of implementing a learning management system (LMS) in a first year introductory macroeconomics course with 600 students in a blended learning context. Experiences of the course coordinator, lecturers and an educational technologist are discussed and data was also collected on student perceptions via a course evaluation questionnaire. Results show that the LMS was successful in a number of areas, particularly in improving the lecturers' accessibility to students and in encouraging interaction and participations in online discussion forums.
- Full Text: false
- Date Issued: 2010
- Authors: Snowball, Jeanette D , Mostert, Markus
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68631 , vital:29297 , https://hdl.handle.net/10520/EJC37639
- Description: Publisher version , The challenges of teaching large classes are well documented in the literature on teaching in higher education. Information and communication technologies (ICTs) have the potential to address some of these challenges, but, used inappropriately, technology can perpetuate entrenched practices and simply support performance models of teaching that encourage transmission approaches to learning. This article reports on the impact of implementing a learning management system (LMS) in a first year introductory macroeconomics course with 600 students in a blended learning context. Experiences of the course coordinator, lecturers and an educational technologist are discussed and data was also collected on student perceptions via a course evaluation questionnaire. Results show that the LMS was successful in a number of areas, particularly in improving the lecturers' accessibility to students and in encouraging interaction and participations in online discussion forums.
- Full Text: false
- Date Issued: 2010
Land price premiums in South Africa's land redistribution process: a case study of Northern Kwazulu-Natal sugarcane farms
- Mbatha, Cyril N, Antrobus, Geoffrey G, Van Rooyen, Jonathan
- Authors: Mbatha, Cyril N , Antrobus, Geoffrey G , Van Rooyen, Jonathan
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142980 , vital:38182 , DOI: 10.1080/03031853.2010.491298
- Description: The desire to transfer 30 per cent of commercial farmland into the hands of black South Africans has progressed slower than anticipated. Politicians and government officials have blamed the market approach to the purchase of land for the challenges and failures in the process. An analysis of the transfer of sugarcane land in two districts in KwaZulu-Natal over the period 2000 to 2006 permitted a comparison of the prices paid to commercial farmers both in private transactions and in the case of sales to government. Data did not support the contention that the slow rate of transfer was due to a manipulation of land prices by landowners in an attempt to stall the process. It was concluded that the state lost most of its bargaining power in the land reform market due to the drawn out nature of the land valuation processes.
- Full Text:
- Date Issued: 2010
- Authors: Mbatha, Cyril N , Antrobus, Geoffrey G , Van Rooyen, Jonathan
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/142980 , vital:38182 , DOI: 10.1080/03031853.2010.491298
- Description: The desire to transfer 30 per cent of commercial farmland into the hands of black South Africans has progressed slower than anticipated. Politicians and government officials have blamed the market approach to the purchase of land for the challenges and failures in the process. An analysis of the transfer of sugarcane land in two districts in KwaZulu-Natal over the period 2000 to 2006 permitted a comparison of the prices paid to commercial farmers both in private transactions and in the case of sales to government. Data did not support the contention that the slow rate of transfer was due to a manipulation of land prices by landowners in an attempt to stall the process. It was concluded that the state lost most of its bargaining power in the land reform market due to the drawn out nature of the land valuation processes.
- Full Text:
- Date Issued: 2010
Learning to be original
- Authors: Wright, Laurence
- Date: 2010
- Language: English
- Type: text , article
- Identifier: vital:7065 , http://hdl.handle.net/10962/d1007431
- Description: preprint , My topic suggested itself in response to a point made at a seminar on University autonomy. Someone observed that many people, even shack dwellers, are interested in the cosmos and they always would be. The remark came in the course of a debate concerning the cost of the SKA project, the massively expensive square kilometer array telescope for which South Africa is bidding against Australia, viewed in relation to the country’s huge list of social backlogs: Big science versus food and decent housing; a false opposition, or a grim choice? You can imagine the debate. The nugget that stayed with me was the tangential comment that ordinary people are always interested in the cosmos. If so, is this true merely because human cultures traditionally incorporate such an interest, or because humans themselves actually need a relation to the cosmos? What might this need be?
- Full Text:
- Date Issued: 2010
- Authors: Wright, Laurence
- Date: 2010
- Language: English
- Type: text , article
- Identifier: vital:7065 , http://hdl.handle.net/10962/d1007431
- Description: preprint , My topic suggested itself in response to a point made at a seminar on University autonomy. Someone observed that many people, even shack dwellers, are interested in the cosmos and they always would be. The remark came in the course of a debate concerning the cost of the SKA project, the massively expensive square kilometer array telescope for which South Africa is bidding against Australia, viewed in relation to the country’s huge list of social backlogs: Big science versus food and decent housing; a false opposition, or a grim choice? You can imagine the debate. The nugget that stayed with me was the tangential comment that ordinary people are always interested in the cosmos. If so, is this true merely because human cultures traditionally incorporate such an interest, or because humans themselves actually need a relation to the cosmos? What might this need be?
- Full Text:
- Date Issued: 2010
Localisation of Theiler's murine encephalomyelitis virus protein 2C to the golgi apparatus using antibodies generated against a peptide region:
- Jauka, Tembisa, Mutsvunguma, Lorraine Z, Boshoff, Aileen, Edkins, Adrienne L, Knox, Caroline M
- Authors: Jauka, Tembisa , Mutsvunguma, Lorraine Z , Boshoff, Aileen , Edkins, Adrienne L , Knox, Caroline M
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/165074 , vital:41206 , DOI: 10.1016/j.jviromet.2010.05.009
- Description: The picornavirus 2C protein is highly conserved and indispensible for virus replication. Polyclonal antibodies against Theiler's murine encephalomyelitis virus (TMEV) 2C protein were generated by immunisation of rabbits with a peptide comprising amino acids 31–210 of the protein. Antibodies were used to investigate the localisation of 2C in infected cells by indirect immunofluorescence and confocal microscopy. Analysis of infected cells revealed that the distribution of 2C changed during infection.
- Full Text:
- Date Issued: 2010
- Authors: Jauka, Tembisa , Mutsvunguma, Lorraine Z , Boshoff, Aileen , Edkins, Adrienne L , Knox, Caroline M
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/165074 , vital:41206 , DOI: 10.1016/j.jviromet.2010.05.009
- Description: The picornavirus 2C protein is highly conserved and indispensible for virus replication. Polyclonal antibodies against Theiler's murine encephalomyelitis virus (TMEV) 2C protein were generated by immunisation of rabbits with a peptide comprising amino acids 31–210 of the protein. Antibodies were used to investigate the localisation of 2C in infected cells by indirect immunofluorescence and confocal microscopy. Analysis of infected cells revealed that the distribution of 2C changed during infection.
- Full Text:
- Date Issued: 2010
Minimum spanning trees for valley and ridge characterization in digital elevation maps
- Bangay, Shaun D, de Bruyn, David, Glass, Kevin R
- Authors: Bangay, Shaun D , de Bruyn, David , Glass, Kevin R
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433247 , vital:72955 , https://doi.org/10.1145/1811158.1811171
- Description: Texture synthesis employs neighbourhood matching to generate appropriate new content. Terrain synthesis has the added constraint that new content must be geographically plausible. The profile recognition and polygon breaking algorithm (PPA) [Chang et al. 1998] provides a robust mechanism for characterizing terrain as systems of valley and ridge lines in digital elevation maps. We exploit this to create a terrain characterization metric that is robust, efficient to compute and is sensitive to terrain properties.
- Full Text:
- Date Issued: 2010
- Authors: Bangay, Shaun D , de Bruyn, David , Glass, Kevin R
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433247 , vital:72955 , https://doi.org/10.1145/1811158.1811171
- Description: Texture synthesis employs neighbourhood matching to generate appropriate new content. Terrain synthesis has the added constraint that new content must be geographically plausible. The profile recognition and polygon breaking algorithm (PPA) [Chang et al. 1998] provides a robust mechanism for characterizing terrain as systems of valley and ridge lines in digital elevation maps. We exploit this to create a terrain characterization metric that is robust, efficient to compute and is sensitive to terrain properties.
- Full Text:
- Date Issued: 2010
Mobile phones, youth radio, citizen journalists: how the news is coming to Grahamstow
- Authors: Dugmore, Harry
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159412 , vital:40295 , https://hdl.handle.net/10520/EJC139343
- Description: Newspapers everywhere are being forced to rethink their role as simply providers of general news of the day. As people can access much more immediate information and news online, from a wide variety of sources, and get to "hear about things" from their friends and contacts through Facebook, Twitter and other "social media", local papers are having to find better ways to provide immediate and more useful information and news.
- Full Text:
- Date Issued: 2010
- Authors: Dugmore, Harry
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159412 , vital:40295 , https://hdl.handle.net/10520/EJC139343
- Description: Newspapers everywhere are being forced to rethink their role as simply providers of general news of the day. As people can access much more immediate information and news online, from a wide variety of sources, and get to "hear about things" from their friends and contacts through Facebook, Twitter and other "social media", local papers are having to find better ways to provide immediate and more useful information and news.
- Full Text:
- Date Issued: 2010
Monitoring perceptions of social progress and pride of place in a South African community
- Moller, Valerie, Radloff, Sarah E
- Authors: Moller, Valerie , Radloff, Sarah E
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68468 , vital:29261 , https://doi.org/10.1007/s11482-010-9092-8 https://doi.org/10.1007/s11482-011-9145-7
- Description: Publisher version , A social indicators community project was conducted in 2007 to monitor living standards and quality of life in Rhini, a low-income suburb of Grahamstown, Makana Municipality, South Africa. Since 1994, under democratic rule, considerable progress has been made in service delivery to the formerly disadvantaged in South African society in terms of access to housing, infrastructure, and a social safety net to mitigate the high rate of unemployment. A representative cross-sectional household study (n 1020) conducted in 2007 in Rhini found that a positive assessment of the household’s situation and personal life satisfaction did not reflect better living conditions. Lack of income and employment opportunities appeared to dilute gains from higher living standards. The project also inquired into attitudes to place names and a proposed name change for the city under discussion at the time of the survey. It is argued that a place name with which one can identify may be as important as service delivery to enhance community satisfaction and overall quality of life. Dissatisfied residents who had limited access to services and expressed less civic pride were more likely than others to opt for a proposed name change for the city of Grahamstown that would better reflect the country’s new identity and multicultural heritage. It is concluded that a useful pursuit for community quality-of-life studies in countries undergoing social transformation will be to inquire into the complex combination of factors that drive perceptions of material and symbolic progress.
- Full Text: false
- Date Issued: 2010
- Authors: Moller, Valerie , Radloff, Sarah E
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/68468 , vital:29261 , https://doi.org/10.1007/s11482-010-9092-8 https://doi.org/10.1007/s11482-011-9145-7
- Description: Publisher version , A social indicators community project was conducted in 2007 to monitor living standards and quality of life in Rhini, a low-income suburb of Grahamstown, Makana Municipality, South Africa. Since 1994, under democratic rule, considerable progress has been made in service delivery to the formerly disadvantaged in South African society in terms of access to housing, infrastructure, and a social safety net to mitigate the high rate of unemployment. A representative cross-sectional household study (n 1020) conducted in 2007 in Rhini found that a positive assessment of the household’s situation and personal life satisfaction did not reflect better living conditions. Lack of income and employment opportunities appeared to dilute gains from higher living standards. The project also inquired into attitudes to place names and a proposed name change for the city under discussion at the time of the survey. It is argued that a place name with which one can identify may be as important as service delivery to enhance community satisfaction and overall quality of life. Dissatisfied residents who had limited access to services and expressed less civic pride were more likely than others to opt for a proposed name change for the city of Grahamstown that would better reflect the country’s new identity and multicultural heritage. It is concluded that a useful pursuit for community quality-of-life studies in countries undergoing social transformation will be to inquire into the complex combination of factors that drive perceptions of material and symbolic progress.
- Full Text: false
- Date Issued: 2010
Natural enemies from South Africa for biological control of Lagarosiphon major (Ridl.) Moss ex Wager (Hydrocharitaceae) in Europe
- Baars, Jan-Robert, Coetzee, Julie A, Martin, Grant D, Hill, Martin P, Caffrey, J M
- Authors: Baars, Jan-Robert , Coetzee, Julie A , Martin, Grant D , Hill, Martin P , Caffrey, J M
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/76914 , vital:30637 , https://doi.org/10.1007/s10750-010-0427-0
- Description: The non-native invasive plant, Lagarosiphon major (Hydrocharitaceae) is a submersed aquatic macrophyte that poses a significant threat to water bodies in Europe. Dense infestations prove difficult to manage using traditional methods. In order to initiate a biocontrol programme, a survey for natural enemies of Lagarosiphon was conducted in South Africa. Several phytophagous species were recorded for the first time, with at least three showing notable promise as candidate agents. Amongst these, a leaf-mining fly, Hydrellia sp. (Ephydridae) that occurred over a wide distribution causes significant leaf damage despite high levels of parasitism by braconid wasps. Another yet unidentified fly was recorded mining the stem of L. major. Two leaf-feeding and shoot boring weevils, cf. Bagous sp. (Curculionidae) were recorded damaging the shoot tips and stunting the growth of the stem. Several leaf-feeding lepidopteran species (Nymphulinae) were frequently recorded, but are expected to feed on a wide range of plant species and are not considered for importation before other candidates are assessed. The discovery of several natural enemies in the country of origin improves the biological control prospects of L. major in Europe.
- Full Text:
- Date Issued: 2010
- Authors: Baars, Jan-Robert , Coetzee, Julie A , Martin, Grant D , Hill, Martin P , Caffrey, J M
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/76914 , vital:30637 , https://doi.org/10.1007/s10750-010-0427-0
- Description: The non-native invasive plant, Lagarosiphon major (Hydrocharitaceae) is a submersed aquatic macrophyte that poses a significant threat to water bodies in Europe. Dense infestations prove difficult to manage using traditional methods. In order to initiate a biocontrol programme, a survey for natural enemies of Lagarosiphon was conducted in South Africa. Several phytophagous species were recorded for the first time, with at least three showing notable promise as candidate agents. Amongst these, a leaf-mining fly, Hydrellia sp. (Ephydridae) that occurred over a wide distribution causes significant leaf damage despite high levels of parasitism by braconid wasps. Another yet unidentified fly was recorded mining the stem of L. major. Two leaf-feeding and shoot boring weevils, cf. Bagous sp. (Curculionidae) were recorded damaging the shoot tips and stunting the growth of the stem. Several leaf-feeding lepidopteran species (Nymphulinae) were frequently recorded, but are expected to feed on a wide range of plant species and are not considered for importation before other candidates are assessed. The discovery of several natural enemies in the country of origin improves the biological control prospects of L. major in Europe.
- Full Text:
- Date Issued: 2010
Newspaper literacy and communication for democracy: is there a crisis in South African journalism?
- Siebörger, Ian, Adendorff, Ralph D
- Authors: Siebörger, Ian , Adendorff, Ralph D
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125304 , vital:35770 , https://doi.org/10.2989/SALALS.2009.27.4.4.1024
- Description: Media theorists such as Barnett (2002), Buckingham (1997 & 2000) and Sampson (1999) describe a perceived crisis hindering the media’s ability to inform citizens for participation in democracy. One of the symptoms and causes of this crisis, they argue, is that the media use language that many citizens cannot understand. This article draws on theories and methodologies from linguistics to investigate whether this claim holds true for South African newspapers. The concept of the crisis in journalism is deconstructed in the light of Street’s (1984) ideological model of literacy. In a pilot study, multiple readability tests were conducted on one article from each of three newspapers, Business Day, The Herald and Daily Sun. The findings of these tests, and a systemic functional grammar analysis of cohesion and lexical density in the three articles, show that all three newspapers tailor their language to fit their target markets. This, triangulated with the rapid growth in readership of the Daily Sun and the more modest growth of The Herald, suggests that many South Africans are better informed for participation in democracy than in the past, although newspapers can do more to help readers learn a plurality of literacy practices.
- Full Text:
- Date Issued: 2010
- Authors: Siebörger, Ian , Adendorff, Ralph D
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125304 , vital:35770 , https://doi.org/10.2989/SALALS.2009.27.4.4.1024
- Description: Media theorists such as Barnett (2002), Buckingham (1997 & 2000) and Sampson (1999) describe a perceived crisis hindering the media’s ability to inform citizens for participation in democracy. One of the symptoms and causes of this crisis, they argue, is that the media use language that many citizens cannot understand. This article draws on theories and methodologies from linguistics to investigate whether this claim holds true for South African newspapers. The concept of the crisis in journalism is deconstructed in the light of Street’s (1984) ideological model of literacy. In a pilot study, multiple readability tests were conducted on one article from each of three newspapers, Business Day, The Herald and Daily Sun. The findings of these tests, and a systemic functional grammar analysis of cohesion and lexical density in the three articles, show that all three newspapers tailor their language to fit their target markets. This, triangulated with the rapid growth in readership of the Daily Sun and the more modest growth of The Herald, suggests that many South Africans are better informed for participation in democracy than in the past, although newspapers can do more to help readers learn a plurality of literacy practices.
- Full Text:
- Date Issued: 2010
Novel, soluble, FluXoro functional substituted zinc phthalocyanines; synthesis, characterization and photophysicochemical properties
- Erdoğmuş, Ali, Nyokong, Tebello
- Authors: Erdoğmuş, Ali , Nyokong, Tebello
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/261258 , vital:53378 , xlink:href="https://doi.org/10.1016/j.dyepig.2010.01.001"
- Description: Three novel phthalonitriles and the respective, peripheral tetrakis zinc phthalocyanines were synthesized and characterized using elemental analysis, IR, 1H NMR, mass spectra and electronic spectroscopy. The phthalocyanines displayed good solubility in organic solvents such as CHCl3, DCM, DMSO, DMF, THF and toluene. The presence of a long chain fluorine substitituent was found to result in reduced aggregation. The singlet oxygen, photodegradation, fluorescence quantum yield, triplet quantum yield and triplet life time of the complexes in toluene were determined. The effect of fluoro-functional groups on the photophysical and photochemical parameters of the zinc(II) phthalocyanines are also reported. Fluorescence quantum yields for the complexes ranged from 0.021 to 0.041.
- Full Text:
- Date Issued: 2010
- Authors: Erdoğmuş, Ali , Nyokong, Tebello
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/261258 , vital:53378 , xlink:href="https://doi.org/10.1016/j.dyepig.2010.01.001"
- Description: Three novel phthalonitriles and the respective, peripheral tetrakis zinc phthalocyanines were synthesized and characterized using elemental analysis, IR, 1H NMR, mass spectra and electronic spectroscopy. The phthalocyanines displayed good solubility in organic solvents such as CHCl3, DCM, DMSO, DMF, THF and toluene. The presence of a long chain fluorine substitituent was found to result in reduced aggregation. The singlet oxygen, photodegradation, fluorescence quantum yield, triplet quantum yield and triplet life time of the complexes in toluene were determined. The effect of fluoro-functional groups on the photophysical and photochemical parameters of the zinc(II) phthalocyanines are also reported. Fluorescence quantum yields for the complexes ranged from 0.021 to 0.041.
- Full Text:
- Date Issued: 2010
Optical limiting properties of zinc phthalocyanines in solution and solid PMMA composite films
- Tekin, Sezen, Kürüm, Ulaş, Durmus, Mahmut, Yaglioglu, H Gul, Nyokong, Tebello, Elmali, Ayhan
- Authors: Tekin, Sezen , Kürüm, Ulaş , Durmus, Mahmut , Yaglioglu, H Gul , Nyokong, Tebello , Elmali, Ayhan
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/249071 , vital:51775 , xlink:href="https://doi.org/10.1016/j.optcom.2010.07.003"
- Description: The nonlinear absorption and optical limiting (OL) performance of tetra- and octasubstituted zinc phthalocyanine complexes were described in solution and in the solid state using the open-aperture Z-scan technique. The measurements were performed using collimated 4 ns pulses generated from a frequency-doubled Nd:YAG laser at 532 nm wavelength. The polymeric films exhibit a much larger effective nonlinear absorption coefficient in comparison with solution. However, the parameters of the ratio of the excited to ground state absorption cross section and energy-dependent saturation in solution are much better compared to properties in the polymeric film. In terms of the ratio of the excited to ground state absorption cross section, the peripherally substituted complexes show better OL performance than the non-peripherally substituted derivative.
- Full Text:
- Date Issued: 2010
- Authors: Tekin, Sezen , Kürüm, Ulaş , Durmus, Mahmut , Yaglioglu, H Gul , Nyokong, Tebello , Elmali, Ayhan
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/249071 , vital:51775 , xlink:href="https://doi.org/10.1016/j.optcom.2010.07.003"
- Description: The nonlinear absorption and optical limiting (OL) performance of tetra- and octasubstituted zinc phthalocyanine complexes were described in solution and in the solid state using the open-aperture Z-scan technique. The measurements were performed using collimated 4 ns pulses generated from a frequency-doubled Nd:YAG laser at 532 nm wavelength. The polymeric films exhibit a much larger effective nonlinear absorption coefficient in comparison with solution. However, the parameters of the ratio of the excited to ground state absorption cross section and energy-dependent saturation in solution are much better compared to properties in the polymeric film. In terms of the ratio of the excited to ground state absorption cross section, the peripherally substituted complexes show better OL performance than the non-peripherally substituted derivative.
- Full Text:
- Date Issued: 2010