Integrating writing development in curricula: writing intensive project case studies
- Authors: Thomson, Carol I
- Date: 2017
- Language: English
- Type: Book , text
- Identifier: http://hdl.handle.net/10962/59580 , vital:27628
- Description: These case studies come from work done in the Writing Intensive Project (WIP) from its inception in 2013 until 2016 when formal funding from a Teacher Development Grant from the National Department of Higher Education ended. The project was unique for Rhodes University as it was the first time an intervention of this kind had ever been directed specifically at undergraduate writing development and support in the disciplines, and secondly, that participation by discipline-based academics in the project was entirely voluntary, thereby exemplifying a significant level of agency.
- Full Text:
- Date Issued: 2017
- Authors: Thomson, Carol I
- Date: 2017
- Language: English
- Type: Book , text
- Identifier: http://hdl.handle.net/10962/59580 , vital:27628
- Description: These case studies come from work done in the Writing Intensive Project (WIP) from its inception in 2013 until 2016 when formal funding from a Teacher Development Grant from the National Department of Higher Education ended. The project was unique for Rhodes University as it was the first time an intervention of this kind had ever been directed specifically at undergraduate writing development and support in the disciplines, and secondly, that participation by discipline-based academics in the project was entirely voluntary, thereby exemplifying a significant level of agency.
- Full Text:
- Date Issued: 2017
Integration of Eucalyptus coppice regeneration with mechanical harvesting in South Africa
- Schwegman, Kylle, Ackerman, S A
- Authors: Schwegman, Kylle , Ackerman, S A
- Date: 2017
- Subjects: Eucalyptus -- Regeneration Harvesting machinery
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/21131 , vital:29443
- Description: In South Africa, ca. 530 000 ha of the plantation area is planted to Eucalyptus spp. which are native to Australia. Commercially grown hardwoods account for 40.5% of the total area planted to trees, yet contribute more than 70% of the timber to the pulpwood market. This is largely attributed to the superior quality of fibre and pulping properties associated with eucalypt plantations, increases in global short-fibre pulp demands. This as well as the ability to reduce the temporary unplanted period and associated re-establishment costs when choosing to regenerate a stand through coppice management. With the unlikelihood of additional eucalypts being introduced into South Africa, and a reduction in genetic gains from 3rd-4th generation tree breading programmes, most of the eucalypts currently planted will be managed for at least one coppice rotation before replanting with improved genetic material if available. This together with the increased use of mechanised silvicultural and harvesting operations, concerns have been raised as to whether the integration of Eucalyptus coppice regeneration and mechanical harvesting in South Africa is both possible and financially viable for the forest industry to practise. The need for integration becomes more important as often mechanised systems have smaller tolerance levels when compared to manual systems. The first trial was situated in Zululand and was implemented to determine the type and severity of stump damage, coppicing potential and coppice growth over the rotation, associated with four types of harvesting and extraction systems on coppice regeneration. Results obtained from these four treatments (harvesting systems that ranged from manual to fully mechanised cut-to-length systems), found that irrespective of the harvesting system used, more damage occurred to the top than bottom half of the stump, with a significant decrease in coppice regrowth with increasing stump damage. Most damage and least coppice regrowth occurred in the extraction rows where the damage recorded could be attributed to vehicle movement, tear-outs and/or log stripping. There was no significant difference between the harvesting systems in terms of stump mortality, final stem stocking and rotation-end volume. Although this trial indicates that the harvesting systems tested had no impact on tree production the severity of damage and/or difference may have been masked by the excellent coppice potential of the species used for this trial (E. grandis x E. urophylla). Based on the results obtained in the first trial, and using five existing data sets, each data set consisted of four treatment sub-sets (4m_8m_s; 2m_8m_s; 4m_8m_BOP; 2m_8m_Or) where possible to determine the cost benefits associated with each treatment at various levels of stocking over a full rotation period. BOP (best operating practice) and Or (original stocking) refers to treatments with two stems stump-1, and s (single stem) refers to one stem stump-1. Within each of the four treatment sub-sets, treatments with three levels of stump survival were sought (60%; 80%; 100%), in order to assess financial viability of harvesting different coppice regimes (one coppice stem and two coppiced stems stump-1) using a fully mechanised cut-to-length harvesting system was tested. No differences were found between one coppice stem and two coppiced stems stump-1 in terms of financial returns (internal rate of return). Of the four treatment sub-sets (4m_8m_s; 2m_8m_s; 4m_8m_BOP; 2m_8m_Or), treatments which had two coppice stems stump-1 lead to increased harvesting cost, while coppice stumps with one stem favours mechanised harvesting and reduced harvesting costs. The final trial, which was also implemented in Zululand, tested the timing of reduction of one coppice stem stump-1 at various stump and stem densities in order to develop an appropriate coppice regime that could favour fully mechanised CTL harvesting systems. Although significant differences were detected at 23 months between the additional control (current recommendation) and the various Reduction_ht (3.5 m, 4.5 m, and 6.5 m) treatments for Dbh, Ba, and Stocking. It is likely that these differences may become less with time due to the decrease in absolute and relative differences between the various treatments with time. This thesis indicates that it is possible to successfully integrate eucalypt coppice regeneration and fully mechanised CTL harvesting. As the results obtained showed that despite the harvesting-associated damage found, no significant difference occurred between the harvesting systems tested in terms of stump mortality, stem stocking (after the final reduction) and rotation-end volume. With regards to the financial implications (using internal rates of return - IRR) associated with harvesting coppice stands of one or two stems stump-1, no clear cost-benefits were found between either of these two treatment scenarios. As those factors that contribute to increased volumes per hectare (increased stem numbers and the retention of two stems stump-1), tend to become normalised across a treatment sub-set, this results in increased harvesting costs with a reduction in the IRR. Coppice management regimes need to be investigated that favour fully mechanised CTL harvesting systems (fewer stems to harvest, but with increased volumes per stem). This includes a reduction to one stem stump-1, as opposed to the current recommendations where some stumps have two stems, such as was tested in the final trial. Although initial results were promising, rotation-end data would be needed to determine any longer term impacts from carrying out an early thinning of coppice shoots to one stem stump-1. Future research needs to be carried out to: determine the influence of mechanised harvesting and extraction for difference species of eucalypts, especially for those that do not coppice as well as the species tested in these trials (Eucalyptus grandis x Eucalyptus urophylla), develop harvesting productivity and/or volume models for coppiced stands of one and two stems stump-1 for different Eucalyptus spp., determine financial returns using specifically designed coppice management regimes which optimise the integration of both mechanical harvesting and silvicultural perations.
- Full Text:
- Date Issued: 2017
- Authors: Schwegman, Kylle , Ackerman, S A
- Date: 2017
- Subjects: Eucalyptus -- Regeneration Harvesting machinery
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/21131 , vital:29443
- Description: In South Africa, ca. 530 000 ha of the plantation area is planted to Eucalyptus spp. which are native to Australia. Commercially grown hardwoods account for 40.5% of the total area planted to trees, yet contribute more than 70% of the timber to the pulpwood market. This is largely attributed to the superior quality of fibre and pulping properties associated with eucalypt plantations, increases in global short-fibre pulp demands. This as well as the ability to reduce the temporary unplanted period and associated re-establishment costs when choosing to regenerate a stand through coppice management. With the unlikelihood of additional eucalypts being introduced into South Africa, and a reduction in genetic gains from 3rd-4th generation tree breading programmes, most of the eucalypts currently planted will be managed for at least one coppice rotation before replanting with improved genetic material if available. This together with the increased use of mechanised silvicultural and harvesting operations, concerns have been raised as to whether the integration of Eucalyptus coppice regeneration and mechanical harvesting in South Africa is both possible and financially viable for the forest industry to practise. The need for integration becomes more important as often mechanised systems have smaller tolerance levels when compared to manual systems. The first trial was situated in Zululand and was implemented to determine the type and severity of stump damage, coppicing potential and coppice growth over the rotation, associated with four types of harvesting and extraction systems on coppice regeneration. Results obtained from these four treatments (harvesting systems that ranged from manual to fully mechanised cut-to-length systems), found that irrespective of the harvesting system used, more damage occurred to the top than bottom half of the stump, with a significant decrease in coppice regrowth with increasing stump damage. Most damage and least coppice regrowth occurred in the extraction rows where the damage recorded could be attributed to vehicle movement, tear-outs and/or log stripping. There was no significant difference between the harvesting systems in terms of stump mortality, final stem stocking and rotation-end volume. Although this trial indicates that the harvesting systems tested had no impact on tree production the severity of damage and/or difference may have been masked by the excellent coppice potential of the species used for this trial (E. grandis x E. urophylla). Based on the results obtained in the first trial, and using five existing data sets, each data set consisted of four treatment sub-sets (4m_8m_s; 2m_8m_s; 4m_8m_BOP; 2m_8m_Or) where possible to determine the cost benefits associated with each treatment at various levels of stocking over a full rotation period. BOP (best operating practice) and Or (original stocking) refers to treatments with two stems stump-1, and s (single stem) refers to one stem stump-1. Within each of the four treatment sub-sets, treatments with three levels of stump survival were sought (60%; 80%; 100%), in order to assess financial viability of harvesting different coppice regimes (one coppice stem and two coppiced stems stump-1) using a fully mechanised cut-to-length harvesting system was tested. No differences were found between one coppice stem and two coppiced stems stump-1 in terms of financial returns (internal rate of return). Of the four treatment sub-sets (4m_8m_s; 2m_8m_s; 4m_8m_BOP; 2m_8m_Or), treatments which had two coppice stems stump-1 lead to increased harvesting cost, while coppice stumps with one stem favours mechanised harvesting and reduced harvesting costs. The final trial, which was also implemented in Zululand, tested the timing of reduction of one coppice stem stump-1 at various stump and stem densities in order to develop an appropriate coppice regime that could favour fully mechanised CTL harvesting systems. Although significant differences were detected at 23 months between the additional control (current recommendation) and the various Reduction_ht (3.5 m, 4.5 m, and 6.5 m) treatments for Dbh, Ba, and Stocking. It is likely that these differences may become less with time due to the decrease in absolute and relative differences between the various treatments with time. This thesis indicates that it is possible to successfully integrate eucalypt coppice regeneration and fully mechanised CTL harvesting. As the results obtained showed that despite the harvesting-associated damage found, no significant difference occurred between the harvesting systems tested in terms of stump mortality, stem stocking (after the final reduction) and rotation-end volume. With regards to the financial implications (using internal rates of return - IRR) associated with harvesting coppice stands of one or two stems stump-1, no clear cost-benefits were found between either of these two treatment scenarios. As those factors that contribute to increased volumes per hectare (increased stem numbers and the retention of two stems stump-1), tend to become normalised across a treatment sub-set, this results in increased harvesting costs with a reduction in the IRR. Coppice management regimes need to be investigated that favour fully mechanised CTL harvesting systems (fewer stems to harvest, but with increased volumes per stem). This includes a reduction to one stem stump-1, as opposed to the current recommendations where some stumps have two stems, such as was tested in the final trial. Although initial results were promising, rotation-end data would be needed to determine any longer term impacts from carrying out an early thinning of coppice shoots to one stem stump-1. Future research needs to be carried out to: determine the influence of mechanised harvesting and extraction for difference species of eucalypts, especially for those that do not coppice as well as the species tested in these trials (Eucalyptus grandis x Eucalyptus urophylla), develop harvesting productivity and/or volume models for coppiced stands of one and two stems stump-1 for different Eucalyptus spp., determine financial returns using specifically designed coppice management regimes which optimise the integration of both mechanical harvesting and silvicultural perations.
- Full Text:
- Date Issued: 2017
Intellectualisation of isiXhosa literature: the case of Jeff Opland
- Authors: Kaschula, Russell H
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67030 , vital:29022 , https://doi.org/10.17159/2309-9070/tvl.v.54i2.413
- Description: publisher version , The origins of the intellectualisation of written isiXhosa literature are often attributed to the missionaries John Ross and John Bennie. They set up a printing press in the Tyhume Valley which later became known as Lovedale Press. They introduced written isiXhosa in 1823 and for this they are acknowledged as the first to write and publish in isiXhosa. This article attempts to trace this intellectualisation process of isiXhosa literature, concentrating on a critique and assessment of the life-long work of Professor Jeff Opland, who has contributed enormously to the present understanding of both oral and written isiXhosa literature. It is argued in this article that his corpus of books and academic articles require some contextualisation within the broader debate of the continued intellectualisation of isiXhosa language and literature. Reference is also made to the Opland isiXhosa literature archive and its contribution to the further intellectualisation of isiXhosa literature. It is suggested in this article that Opland is one of the greatest contributors to academic debates concerning isiXhosa literature and history. Izibongo or oral poems written by, and about Jeff Opland are analysed to further enhance the context of his contribution.
- Full Text:
- Date Issued: 2017
- Authors: Kaschula, Russell H
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67030 , vital:29022 , https://doi.org/10.17159/2309-9070/tvl.v.54i2.413
- Description: publisher version , The origins of the intellectualisation of written isiXhosa literature are often attributed to the missionaries John Ross and John Bennie. They set up a printing press in the Tyhume Valley which later became known as Lovedale Press. They introduced written isiXhosa in 1823 and for this they are acknowledged as the first to write and publish in isiXhosa. This article attempts to trace this intellectualisation process of isiXhosa literature, concentrating on a critique and assessment of the life-long work of Professor Jeff Opland, who has contributed enormously to the present understanding of both oral and written isiXhosa literature. It is argued in this article that his corpus of books and academic articles require some contextualisation within the broader debate of the continued intellectualisation of isiXhosa language and literature. Reference is also made to the Opland isiXhosa literature archive and its contribution to the further intellectualisation of isiXhosa literature. It is suggested in this article that Opland is one of the greatest contributors to academic debates concerning isiXhosa literature and history. Izibongo or oral poems written by, and about Jeff Opland are analysed to further enhance the context of his contribution.
- Full Text:
- Date Issued: 2017
Intelligence based error detection and classification for 3D measurement systems
- Van Rooyen, Ivän Jan-Richard
- Authors: Van Rooyen, Ivän Jan-Richard
- Date: 2017
- Subjects: Computer integrated manufacturing systems Manufacturing processes -- Automation , Computers, Special purpose Neural networks (Computer science)
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/21241 , vital:29461
- Description: For many years 2D machine vision has been used to perform automated inspection and measuring in the manufacturing environment. A strong drive to automate manufacturing has meant improvements in robotics and sensor technologies. So has machine vision seen a steady movement away from 2D and towards 3D. It is necessary to research and develop software that can use these new 3D sensing equipment in novel and useful ways. One task that is particularly useful, for a variety of situations is object recognition. It was hypothesised that it should be possible to train artificial neural networks to recognise 3D objects. For this purpose a 3D laser scanner was developed. This scanner and its software was developed and tested first in a virtual environment and what was learned there was then used to implemented an actual scanner. This scanner served the purpose of verifying what was done in the virtual environment. Neural networks of different sized were trained to establish whether they are a feasible classifier for the task of object recognition. Testing showed that, with the correct preprocessing, it is possible to perform 3D object recognition on simple geometric shapes by means of artificial neural networks.
- Full Text:
- Date Issued: 2017
- Authors: Van Rooyen, Ivän Jan-Richard
- Date: 2017
- Subjects: Computer integrated manufacturing systems Manufacturing processes -- Automation , Computers, Special purpose Neural networks (Computer science)
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/21241 , vital:29461
- Description: For many years 2D machine vision has been used to perform automated inspection and measuring in the manufacturing environment. A strong drive to automate manufacturing has meant improvements in robotics and sensor technologies. So has machine vision seen a steady movement away from 2D and towards 3D. It is necessary to research and develop software that can use these new 3D sensing equipment in novel and useful ways. One task that is particularly useful, for a variety of situations is object recognition. It was hypothesised that it should be possible to train artificial neural networks to recognise 3D objects. For this purpose a 3D laser scanner was developed. This scanner and its software was developed and tested first in a virtual environment and what was learned there was then used to implemented an actual scanner. This scanner served the purpose of verifying what was done in the virtual environment. Neural networks of different sized were trained to establish whether they are a feasible classifier for the task of object recognition. Testing showed that, with the correct preprocessing, it is possible to perform 3D object recognition on simple geometric shapes by means of artificial neural networks.
- Full Text:
- Date Issued: 2017
Inter-generational dynamics of smallholder farming households : a case study of family farms at Bumbane and Emagaleni villages, Eastern Cape Province, South Africa
- Authors: Sixoto, Wandisile
- Date: 2017
- Subjects: Family farms -- South Africa -- Eastern Cape Family-owned business enterprises -- Succession
- Language: English
- Type: Thesis , Masters , M Agric
- Identifier: http://hdl.handle.net/10353/7886 , vital:30791
- Description: This research investigates the inter-generational dynamics of smallholder farming households and their implications for the future of agriculture in the Eastern Cape province of South Africa. The study was conducted in two villages, of which one, Bumbane, is in Amahlathi Local Municipality, and the other, Emagaleni, is in Raymond Mhlaba Local Municipality. The study was mainly qualitative in nature, and involved semi structured, in-depth interviews with small-scale farming households. In particular, interviews were conducted with both youth and elders in the same households, so as to deeply understand the inter-relationships between the two. The study established that there is an age-based hierarchy in most farming families whereby the household head is ‘in charge’ and allows little input from or discretion of his/her adult children. For example, most household heads are not comfortable sharing decision-making authority with adult children, which alienates these adult children. This is the case even though household heads are keen to transfer their knowledge to their children, and hope that their children will one day take over the farming. The discord between household heads and their adult child is one of the reasons why the youth tend to dedicate little of their time to helping out with the farming. On the other hand, the youth are also discouraged from agriculture by other factors, such as production constraints and poor access to markets These intergenerational dynamics may pose a threat to the future of family farming in these and similar communities. The paper concludes that, in as much as household heads learnt agriculture through a participatory approach, there is a necessity to change the strategy and emphasise motivating young adults through farmers’ days and other gatherings that may serve as an inspiration. Alternatively, elders need to be coaxed to adopt a more thoughtful approach to engaging their adult children in agriculture that has a better possibility of encouraging their participation in agriculture rather than discouraging it. The participatory approach must not be the only option, since females do not get the opportunity to be motivated as most of the talks happen on the field.
- Full Text:
- Date Issued: 2017
- Authors: Sixoto, Wandisile
- Date: 2017
- Subjects: Family farms -- South Africa -- Eastern Cape Family-owned business enterprises -- Succession
- Language: English
- Type: Thesis , Masters , M Agric
- Identifier: http://hdl.handle.net/10353/7886 , vital:30791
- Description: This research investigates the inter-generational dynamics of smallholder farming households and their implications for the future of agriculture in the Eastern Cape province of South Africa. The study was conducted in two villages, of which one, Bumbane, is in Amahlathi Local Municipality, and the other, Emagaleni, is in Raymond Mhlaba Local Municipality. The study was mainly qualitative in nature, and involved semi structured, in-depth interviews with small-scale farming households. In particular, interviews were conducted with both youth and elders in the same households, so as to deeply understand the inter-relationships between the two. The study established that there is an age-based hierarchy in most farming families whereby the household head is ‘in charge’ and allows little input from or discretion of his/her adult children. For example, most household heads are not comfortable sharing decision-making authority with adult children, which alienates these adult children. This is the case even though household heads are keen to transfer their knowledge to their children, and hope that their children will one day take over the farming. The discord between household heads and their adult child is one of the reasons why the youth tend to dedicate little of their time to helping out with the farming. On the other hand, the youth are also discouraged from agriculture by other factors, such as production constraints and poor access to markets These intergenerational dynamics may pose a threat to the future of family farming in these and similar communities. The paper concludes that, in as much as household heads learnt agriculture through a participatory approach, there is a necessity to change the strategy and emphasise motivating young adults through farmers’ days and other gatherings that may serve as an inspiration. Alternatively, elders need to be coaxed to adopt a more thoughtful approach to engaging their adult children in agriculture that has a better possibility of encouraging their participation in agriculture rather than discouraging it. The participatory approach must not be the only option, since females do not get the opportunity to be motivated as most of the talks happen on the field.
- Full Text:
- Date Issued: 2017
Inter-role conflict and coping strategies of employed mothers : a study of selected private schools in the Mthatha area of the Eastern Cape Province, South Africa
- Authors: Tegbe, Dzigbordi
- Date: 2017
- Subjects: Role conflict Working mothers Women -- Employment , Children of working mothers
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/7830 , vital:30768
- Description: Working women are finding it increasingly challenging to establish a balance between work and family life. This often results in work-family conflicts which affect women teachers’ well-being. The current study utilised role theory to investigate the effect of work-family conflicts on work related income, using the Mthatha community as case study. The study explored the impact of inter-role conflict on stress related illness and the coping strategies working women can adopt to create work-family balance. The motivation of the study is based on limited research regarding the impact of work-family on South African working mothers, where feminisation of labour force is compelling women to devote more time to their work roles thus neglecting their traditional roles as mothers. The research design used a cross section survey, and the sampling procedure applied a multi-stage concept of data collection, where both qualitative and quantitative methods were used to delve into the issues of inter-role conflict and coping strategies of employed mother-teachers, to establish causal relationships geared towards explaining the phenomena. The population consisted of working mothers in Mthatha private schools, where data was collected using a work-family conflict questionnaire. The results of the study established a positive relationship between the multi-tasking of mother-teachers and inter-role conflicts, and also confirmed that work roles/tasks have become overwhelming. Consequently, working women families are neglected, while support from extended families is not coming or is insufficient to alleviate the burdens of role conflicts. The conflicts lead to stress-related illnesses and individually, women are not interested in consulting psychologists to manage their stress. The women suffer ailments such as headaches, general pains, sleep dysfunction, high or low blood pressure, heart diseases, and become moody and tearful, expressing low self-esteem. Women teachers in Mthatha were of the view that proper strategies are needed to mitigate their stress. Some of these coping strategies involve a good condition of service at school, refraining from applying medication to solve stress, taking part in exercise and rest, and having a relaxing time with family and friends. The findings of this study can help through suggesting useful strategies that can be utilised by working teachers who are mothers to mitigate their inter-role conflict. It will also lead to more insight into role theories.
- Full Text:
- Date Issued: 2017
- Authors: Tegbe, Dzigbordi
- Date: 2017
- Subjects: Role conflict Working mothers Women -- Employment , Children of working mothers
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/7830 , vital:30768
- Description: Working women are finding it increasingly challenging to establish a balance between work and family life. This often results in work-family conflicts which affect women teachers’ well-being. The current study utilised role theory to investigate the effect of work-family conflicts on work related income, using the Mthatha community as case study. The study explored the impact of inter-role conflict on stress related illness and the coping strategies working women can adopt to create work-family balance. The motivation of the study is based on limited research regarding the impact of work-family on South African working mothers, where feminisation of labour force is compelling women to devote more time to their work roles thus neglecting their traditional roles as mothers. The research design used a cross section survey, and the sampling procedure applied a multi-stage concept of data collection, where both qualitative and quantitative methods were used to delve into the issues of inter-role conflict and coping strategies of employed mother-teachers, to establish causal relationships geared towards explaining the phenomena. The population consisted of working mothers in Mthatha private schools, where data was collected using a work-family conflict questionnaire. The results of the study established a positive relationship between the multi-tasking of mother-teachers and inter-role conflicts, and also confirmed that work roles/tasks have become overwhelming. Consequently, working women families are neglected, while support from extended families is not coming or is insufficient to alleviate the burdens of role conflicts. The conflicts lead to stress-related illnesses and individually, women are not interested in consulting psychologists to manage their stress. The women suffer ailments such as headaches, general pains, sleep dysfunction, high or low blood pressure, heart diseases, and become moody and tearful, expressing low self-esteem. Women teachers in Mthatha were of the view that proper strategies are needed to mitigate their stress. Some of these coping strategies involve a good condition of service at school, refraining from applying medication to solve stress, taking part in exercise and rest, and having a relaxing time with family and friends. The findings of this study can help through suggesting useful strategies that can be utilised by working teachers who are mothers to mitigate their inter-role conflict. It will also lead to more insight into role theories.
- Full Text:
- Date Issued: 2017
Interacting motif networks located in hotspots associated with RNA release are conserved in Enterovirus capsids
- Ross, Caroline J, Knox, Caroline M, Tastan Bishop, Özlem
- Authors: Ross, Caroline J , Knox, Caroline M , Tastan Bishop, Özlem
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124855 , vital:35704 , https://doi.10.1002/1873-3468.12663
- Description: Enteroviruses are responsible for a multitude of human diseases. Expansion of the virus capsid is associated with a cascade of conformational changes that allow the subsequent release of RNA. For the first time, this study presents a comprehensive bioinformatic screen for the prediction of interacting motifs within intraprotomer interfaces and across respective interfaces surrounding the fivefold and twofold axes. The results identify a network of conserved motif residues involved in interactions in enteroviruses that may be critical to capsid stabilisation, providing guidelines towards developing antivirals that interfere with viral expansion during RNA release.
- Full Text:
- Date Issued: 2017
- Authors: Ross, Caroline J , Knox, Caroline M , Tastan Bishop, Özlem
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124855 , vital:35704 , https://doi.10.1002/1873-3468.12663
- Description: Enteroviruses are responsible for a multitude of human diseases. Expansion of the virus capsid is associated with a cascade of conformational changes that allow the subsequent release of RNA. For the first time, this study presents a comprehensive bioinformatic screen for the prediction of interacting motifs within intraprotomer interfaces and across respective interfaces surrounding the fivefold and twofold axes. The results identify a network of conserved motif residues involved in interactions in enteroviruses that may be critical to capsid stabilisation, providing guidelines towards developing antivirals that interfere with viral expansion during RNA release.
- Full Text:
- Date Issued: 2017
Interactions between two biological control agents released on Pereskia aculeata Miller (Cactaceae), in South Africa
- Authors: Mnqeta, Zezethu
- Date: 2017
- Subjects: Pereskia aculeata -- Biological control , Cactus -- Biological control -- South Africa , Alien plants -- Biological control -- South Africa , Flea beetles -- South Africa , Coreidae -- South Africa , Insects as biological pest control agents -- South Africa
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/7949 , vital:21327
- Description: Pereskia aculeata Miller (Cactaceae) is an alien invasive plant introduced into South Africa from Brazil, which has negative impacts on native biodiversity in South Africa. Phenrica guerini Bechyne (Chrysomelidae) and Catorhintha schaffneri Brailovsky & Garcia (Coreidae) are two biological control agents released against P. aculeata in South Africa. Phenrica guerini was first released against P. aculeata, in 1991, followed by C. schaffneri in 2014. The overall aim of this study was to improve the biological control programme against P. aculeata in order to decrease its density to a level where it does not threaten the native biodiversity of South Africa. The first part of this study evaluated the efficacy of P. guerini on P. aculeata at Port Alfred (Eastern Cape) to better understand the role of P. guerini in the biological control of P. aculeata. An insecticide exclusion experiment was conducted over 100 days. Plots with P. guerini had a mean of 187 (SE ± 62) fewer leaves/m2 than plots without P. guerini. The agent reduced percentage cover in plots with P. guerini, with a mean of 19.42% (SE ± 3.15) lower cover than plots without P. guerini. Although P. guerini had an impact on P. aculeata at Port Alfred previous studies have indicated that a reduction to below 50% cover is required for native biodiversity to recover and the agent only reduced cover to 62% at Port Alfred. Phenrica guerini has therefore not reduced percentage cover sufficiently to completely control the weed. The data collected from Port Alfred was compared to the performance of the agent nationwide. Although P. guerini was found at far more sites than previously recorded, there were very few sites with comparable levels of damage to Port Alfred. This evidence suggests that P. guerini is not sufficiently damaging to reduce P. aculeata to acceptable levels and other biological control agents should be considered.Interactions between two biological control agents can have complex and unexpected impacts for a biological control programme. The second part of this study was to investigate interactions between C. schaffneri and P. guerini under laboratory conditions to test whether the two agents, individually or jointly, enhanced or reduced their impact on P. aculeata. Potted P. aculeata plants were exposed to one of four treatments: control (no agents), P. guerini only, C. schaffneri only and both species in combination. Four stocking densities, ranging from 2 to 12 insects per plant were used. Catorhintha schaffneri alone at high densities was more damaging than all other treatments with a significantly greater reduction in the mean number of leaves, 11.7 (SE ± 1.29), and shoot lengths, 2.17cm (SE ± O. 75). Even at lower density treatments, the combination of the two agents was not significantly more damaging than C. schaffneri alone and C. schaffneri was always more damaging than P. guerini alone. Mortality of P. guerini was significantly higher than C. schaffneri at the highest stocking density when in combination. Phenrica guerini contributes towards the biological control of P. aculeata at some sites in South Africa but not enough to completely control the weed. The antagonistic interaction between P. guerini and C. schaffneri suggests that these agents should not be released together because this would impact negatively on the overall biocontrol programme against P. aculeata. Catorhintha schaffneri should be released at sites were P. guerini is not present and evaluations of the success of this agent in the field should be conducted. Extrapolation of laboratory-based studies into the field is often challenging so mass-rearing of P. guerini should continue until there is convincing proof that C. schaffneri alone is more effective than P. guerini in the field.
- Full Text:
- Date Issued: 2017
- Authors: Mnqeta, Zezethu
- Date: 2017
- Subjects: Pereskia aculeata -- Biological control , Cactus -- Biological control -- South Africa , Alien plants -- Biological control -- South Africa , Flea beetles -- South Africa , Coreidae -- South Africa , Insects as biological pest control agents -- South Africa
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/7949 , vital:21327
- Description: Pereskia aculeata Miller (Cactaceae) is an alien invasive plant introduced into South Africa from Brazil, which has negative impacts on native biodiversity in South Africa. Phenrica guerini Bechyne (Chrysomelidae) and Catorhintha schaffneri Brailovsky & Garcia (Coreidae) are two biological control agents released against P. aculeata in South Africa. Phenrica guerini was first released against P. aculeata, in 1991, followed by C. schaffneri in 2014. The overall aim of this study was to improve the biological control programme against P. aculeata in order to decrease its density to a level where it does not threaten the native biodiversity of South Africa. The first part of this study evaluated the efficacy of P. guerini on P. aculeata at Port Alfred (Eastern Cape) to better understand the role of P. guerini in the biological control of P. aculeata. An insecticide exclusion experiment was conducted over 100 days. Plots with P. guerini had a mean of 187 (SE ± 62) fewer leaves/m2 than plots without P. guerini. The agent reduced percentage cover in plots with P. guerini, with a mean of 19.42% (SE ± 3.15) lower cover than plots without P. guerini. Although P. guerini had an impact on P. aculeata at Port Alfred previous studies have indicated that a reduction to below 50% cover is required for native biodiversity to recover and the agent only reduced cover to 62% at Port Alfred. Phenrica guerini has therefore not reduced percentage cover sufficiently to completely control the weed. The data collected from Port Alfred was compared to the performance of the agent nationwide. Although P. guerini was found at far more sites than previously recorded, there were very few sites with comparable levels of damage to Port Alfred. This evidence suggests that P. guerini is not sufficiently damaging to reduce P. aculeata to acceptable levels and other biological control agents should be considered.Interactions between two biological control agents can have complex and unexpected impacts for a biological control programme. The second part of this study was to investigate interactions between C. schaffneri and P. guerini under laboratory conditions to test whether the two agents, individually or jointly, enhanced or reduced their impact on P. aculeata. Potted P. aculeata plants were exposed to one of four treatments: control (no agents), P. guerini only, C. schaffneri only and both species in combination. Four stocking densities, ranging from 2 to 12 insects per plant were used. Catorhintha schaffneri alone at high densities was more damaging than all other treatments with a significantly greater reduction in the mean number of leaves, 11.7 (SE ± 1.29), and shoot lengths, 2.17cm (SE ± O. 75). Even at lower density treatments, the combination of the two agents was not significantly more damaging than C. schaffneri alone and C. schaffneri was always more damaging than P. guerini alone. Mortality of P. guerini was significantly higher than C. schaffneri at the highest stocking density when in combination. Phenrica guerini contributes towards the biological control of P. aculeata at some sites in South Africa but not enough to completely control the weed. The antagonistic interaction between P. guerini and C. schaffneri suggests that these agents should not be released together because this would impact negatively on the overall biocontrol programme against P. aculeata. Catorhintha schaffneri should be released at sites were P. guerini is not present and evaluations of the success of this agent in the field should be conducted. Extrapolation of laboratory-based studies into the field is often challenging so mass-rearing of P. guerini should continue until there is convincing proof that C. schaffneri alone is more effective than P. guerini in the field.
- Full Text:
- Date Issued: 2017
Intergenerational learning and environmental care: a case of a fishing community next to Africa’s first marine protected area
- Authors: Cloete, Cindy-Lee
- Date: 2017
- Subjects: Tsitsikamma Marine Protected Area (South Africa) , Covie (South Africa) , Intergenerational relations -- South Africa -- Covie , Intergenerational communication -- South Africa -- Covie , Fishing villages -- South Africa -- Covie , Sustainable fisheries -- South Africa -- Covie , Environmental education -- South Africa -- Covie
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/7598 , vital:21277
- Description: This study explored the relationship between intergenerational learning and environmental care in the small fishing community of Covie, located next to the Tsitsikamma Marine Protected Area (TMPA) on the south-eastern coast of South Africa. Since Covie’s establishment as a woodcutter settlement in 1883, the community has depended on the marine and coastal environment such that their communal identity and basic means of subsistence are closely tied to their traditional fishing practices. Since its proclamation in 1964, the TMPA has undergone numerous policy changes, most notably the complete closure of the TMPA to fishing in 2001. Against this backdrop, the study sought to understand how intergenerational learning about fishing practices are mediated in Covie and the ways in which such learning processes constitute a sense of place and belonging for the Covie fishers, and to develop a sense of care for the natural environment. The study included 12 Covie community members of different generations and genders so as to be representative of the community (approximately 86 members). The research was informed by qualitative data generated through a focus group discussion with eight Covie community members, a mirror workshop with the same eight community members, eight semi-structured interviews, and five naturalistic observations of fishing practices. Data generation and analysis was informed by Etienne Wenger’s theory of Communities of Practice which was complemented by theoretical perspectives on intergenerational learning and attachment to place. This study found that the Covie fishers indeed operate as a community of practice who depend significantly on intergenerational learning processes to transfer knowledge, skills and values about fishing practices to younger generations. The 2001 policy changes that denied the Covie fishers access to their traditional fishing sites were shown to reduce the participation in fishing of a range of community members (in particular children and women), which in turn influenced forms of intergenerational learning about fishing. The youth’s reduced participation especially was linked to more protracted and fragmented processes of learning about fishing and Covie’s code of fishing conduct, including its underpinning sense of environmental care. Finally, this study argues that the affective and socio-material connections to their natural surroundings have shaped the Covie community’s sense of care and responsibility toward the environment.
- Full Text:
- Date Issued: 2017
- Authors: Cloete, Cindy-Lee
- Date: 2017
- Subjects: Tsitsikamma Marine Protected Area (South Africa) , Covie (South Africa) , Intergenerational relations -- South Africa -- Covie , Intergenerational communication -- South Africa -- Covie , Fishing villages -- South Africa -- Covie , Sustainable fisheries -- South Africa -- Covie , Environmental education -- South Africa -- Covie
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/7598 , vital:21277
- Description: This study explored the relationship between intergenerational learning and environmental care in the small fishing community of Covie, located next to the Tsitsikamma Marine Protected Area (TMPA) on the south-eastern coast of South Africa. Since Covie’s establishment as a woodcutter settlement in 1883, the community has depended on the marine and coastal environment such that their communal identity and basic means of subsistence are closely tied to their traditional fishing practices. Since its proclamation in 1964, the TMPA has undergone numerous policy changes, most notably the complete closure of the TMPA to fishing in 2001. Against this backdrop, the study sought to understand how intergenerational learning about fishing practices are mediated in Covie and the ways in which such learning processes constitute a sense of place and belonging for the Covie fishers, and to develop a sense of care for the natural environment. The study included 12 Covie community members of different generations and genders so as to be representative of the community (approximately 86 members). The research was informed by qualitative data generated through a focus group discussion with eight Covie community members, a mirror workshop with the same eight community members, eight semi-structured interviews, and five naturalistic observations of fishing practices. Data generation and analysis was informed by Etienne Wenger’s theory of Communities of Practice which was complemented by theoretical perspectives on intergenerational learning and attachment to place. This study found that the Covie fishers indeed operate as a community of practice who depend significantly on intergenerational learning processes to transfer knowledge, skills and values about fishing practices to younger generations. The 2001 policy changes that denied the Covie fishers access to their traditional fishing sites were shown to reduce the participation in fishing of a range of community members (in particular children and women), which in turn influenced forms of intergenerational learning about fishing. The youth’s reduced participation especially was linked to more protracted and fragmented processes of learning about fishing and Covie’s code of fishing conduct, including its underpinning sense of environmental care. Finally, this study argues that the affective and socio-material connections to their natural surroundings have shaped the Covie community’s sense of care and responsibility toward the environment.
- Full Text:
- Date Issued: 2017
Internal service quality impacts on customer satisfaction in the Department of Roads and Public Works Sarah Baartman Region
- Authors: Mooi, Mzingisi
- Date: 2017
- Subjects: Consumer satisfaction -- South Africa -- Eastern Cape , Customer services -- South Africa -- Eastern Cape -- Quality control Total quality management -- Government Civil service -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/19146 , vital:28777
- Description: The main objective of this study is to determine the impacts of internal service quality on customer satisfaction with specific reference to Department of Roads and Public Works Sarah Baartman Region (DRPW-SBR). The provision of high quality internal services to customers through policies and systems that support service delivery has a huge impact on customer satisfaction. Public organisations are generally criticised for service delivery inefficiencies and poor quality services; the DRPW-SBR is not an exception from such criticism. A study of this nature can be considered as a valuable undertaking that provides valuable insight as to the important internal service quality factors hindering DRPW-SBR from delivering services and satisfying customers. The study was specifically looking at investigating internal service quality dimensions as measured by the way of professionalism, responsiveness, tangibility, flexibility and reliability, play in the achievement of perceived customer satisfaction within DRPW-SBR. The research was set up in such a way that internal customers who were employees of DRPW-SBR and external customers who were employees of other departments served by DRPW-SBR, constituted the sample participants. The methodology considered most suitable was a quantitative research whereby questionnaires were utilised to collect primary data. The questionnaires were based on a five-point Likert scale measuring instruments that ranged from (1) strongly disagree to (5) strongly agree. Questionnaires were distributed to those respondents selected of whom 101 respondents participated; the results were calculated using a STATISTICA program. The key findings indicated that internal service quality played a vital role in achieving perceived customer satisfaction. Important internal service dimensions that were found to be significant in increasing perceived customer satisfaction within DRPW -SBR were reliability, flexibility and professionalism. Responsiveness and tangibility were found not to exert positive influence on perceived customer satisfaction within DRPW-SBR.
- Full Text:
- Date Issued: 2017
- Authors: Mooi, Mzingisi
- Date: 2017
- Subjects: Consumer satisfaction -- South Africa -- Eastern Cape , Customer services -- South Africa -- Eastern Cape -- Quality control Total quality management -- Government Civil service -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/19146 , vital:28777
- Description: The main objective of this study is to determine the impacts of internal service quality on customer satisfaction with specific reference to Department of Roads and Public Works Sarah Baartman Region (DRPW-SBR). The provision of high quality internal services to customers through policies and systems that support service delivery has a huge impact on customer satisfaction. Public organisations are generally criticised for service delivery inefficiencies and poor quality services; the DRPW-SBR is not an exception from such criticism. A study of this nature can be considered as a valuable undertaking that provides valuable insight as to the important internal service quality factors hindering DRPW-SBR from delivering services and satisfying customers. The study was specifically looking at investigating internal service quality dimensions as measured by the way of professionalism, responsiveness, tangibility, flexibility and reliability, play in the achievement of perceived customer satisfaction within DRPW-SBR. The research was set up in such a way that internal customers who were employees of DRPW-SBR and external customers who were employees of other departments served by DRPW-SBR, constituted the sample participants. The methodology considered most suitable was a quantitative research whereby questionnaires were utilised to collect primary data. The questionnaires were based on a five-point Likert scale measuring instruments that ranged from (1) strongly disagree to (5) strongly agree. Questionnaires were distributed to those respondents selected of whom 101 respondents participated; the results were calculated using a STATISTICA program. The key findings indicated that internal service quality played a vital role in achieving perceived customer satisfaction. Important internal service dimensions that were found to be significant in increasing perceived customer satisfaction within DRPW -SBR were reliability, flexibility and professionalism. Responsiveness and tangibility were found not to exert positive influence on perceived customer satisfaction within DRPW-SBR.
- Full Text:
- Date Issued: 2017
Interrogating citizen journalism practices: a case study of Rhodes University’s Lindaba Ziyafika Project
- Nyathi, Sihle, Garman, Anthea
- Authors: Nyathi, Sihle , Garman, Anthea
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158915 , vital:40240 , https://doi.org/10.1080/23743670.2016.1259740
- Description: Several scholars have noted that citizen journalism in the West is essentially an online phenomenon, driven by the affordability of Internet technologies. In Africa, projects such as Ushahidi in Kenya have been enabled by platforms such as cell phones and social networks. Voices of Africa, based in southern Africa, publishes on the web only. Publishing on the Internet presumes a citizenry which is relatively well educated; has familiarity with, and access to, new media as a form of social communication; and is confident in their right to participate in newly developed public spheres – particularly those online.
- Full Text:
- Date Issued: 2017
- Authors: Nyathi, Sihle , Garman, Anthea
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/158915 , vital:40240 , https://doi.org/10.1080/23743670.2016.1259740
- Description: Several scholars have noted that citizen journalism in the West is essentially an online phenomenon, driven by the affordability of Internet technologies. In Africa, projects such as Ushahidi in Kenya have been enabled by platforms such as cell phones and social networks. Voices of Africa, based in southern Africa, publishes on the web only. Publishing on the Internet presumes a citizenry which is relatively well educated; has familiarity with, and access to, new media as a form of social communication; and is confident in their right to participate in newly developed public spheres – particularly those online.
- Full Text:
- Date Issued: 2017
Intimate strangers: encountering the foreign in urban spaces
- Authors: Seshoka, Thabo Jerry
- Date: 2017
- Subjects: Urbanization -- South Africa -- Port Elizabeth -- History , Cities and towns -- South Africa -- Port Elizabeth -- History Architecture -- South Africa -- Port Elizabeth Cultural property -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/13746 , vital:27304
- Description: The year 2015 marked a significant year in South African History and it ignited a deep desire in the hearts of locals in Port Elizabeth, Nelson Mandela Bay Metropolitan to question and engage with the city’s ambivalent heritage landscape and heritage discourse. The year 2015 was the year in which the country witnessed the rise community movements that called for the removal of Victorian and Apartheid era heritages across the country. The year also saw a rise in violent service delivery protests and a rise in the amount of xenophobic attacks across the county, including Port Elizabeth. In this thesis, positioned within the field of heritage studies (Anthropology) and employing the concept of the ubuhlanti (Kraal) as a tool to understand the former within a heritage framework. The thesis unpacks and demonstrate how the city centre of Port Elizabeth can be likened to the concept of the ubuhlanti. The ubuhlanti: an intimate community space, which has the potential to double up as an exclusionary space, excluding those who do not possess the necessary social capital to enter its centre.
- Full Text:
- Date Issued: 2017
- Authors: Seshoka, Thabo Jerry
- Date: 2017
- Subjects: Urbanization -- South Africa -- Port Elizabeth -- History , Cities and towns -- South Africa -- Port Elizabeth -- History Architecture -- South Africa -- Port Elizabeth Cultural property -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/13746 , vital:27304
- Description: The year 2015 marked a significant year in South African History and it ignited a deep desire in the hearts of locals in Port Elizabeth, Nelson Mandela Bay Metropolitan to question and engage with the city’s ambivalent heritage landscape and heritage discourse. The year 2015 was the year in which the country witnessed the rise community movements that called for the removal of Victorian and Apartheid era heritages across the country. The year also saw a rise in violent service delivery protests and a rise in the amount of xenophobic attacks across the county, including Port Elizabeth. In this thesis, positioned within the field of heritage studies (Anthropology) and employing the concept of the ubuhlanti (Kraal) as a tool to understand the former within a heritage framework. The thesis unpacks and demonstrate how the city centre of Port Elizabeth can be likened to the concept of the ubuhlanti. The ubuhlanti: an intimate community space, which has the potential to double up as an exclusionary space, excluding those who do not possess the necessary social capital to enter its centre.
- Full Text:
- Date Issued: 2017
Intrapreneurship at the South African Institute of Chartered Accountants
- Authors: Mare, Timothy
- Date: 2017
- Subjects: South African Institute of Chartered Accountants , Creative ability in business -- South Africa -- Management Entrepreneurship -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/18518 , vital:28656
- Description: The purpose of this research study is to assess the extent to which intrapreneurship is practised at the South African Institute of Chartered Accountants (SAICA), which operates as a non-profit organisation. The importance of intrapreneurship should not be taken lightly if organisations are to remain competitive. Human capital is considered a key resource in the provision of innovation which results in availing products and services to customers so as to remain relevant and make profits or achieve the different strategic objectives of organisations. This research constituted the collection and quantitative analysis of two data sets. The first data set was gathered through a structured questionnaire that assessed 13 constructs, which measured the intrapreneurial climate at SAICA. The second data set focused on assessing and measuring 20 intrapreneurial characteristics and was generated through self-completed questionnaires. The questionnaires were sent to 112 employees through an online tool and a total of 57 questionnaires were completed and analysed. The findings indicate that intrapreneurship at SAICA is poorly and inadequately performed. There is a general perception that there is no tolerance for risk, mistakes and failure and that the rewards and reinforcement are poorly implemented. The relationship between superiors and staff is skewed thus creating a culture of fear to make mistakes or to speak openly. The following recommendations were suggested: Encourage superiors to engage with staff and support intrapreneurship through appropriate reward systems and reinforcement; encourage superiors to promote innovation by increasing tolerance to mistakes and risk. This could also be achieved by allowing staff to use their abilities to contribute to decision making; Increase awareness about intrapreneurship among staff in order to motivate individuals; Use existing structures such as the employment equity committees, departmental steward meetings as well as employee forums to improve trust between superiors and staff.
- Full Text:
- Date Issued: 2017
- Authors: Mare, Timothy
- Date: 2017
- Subjects: South African Institute of Chartered Accountants , Creative ability in business -- South Africa -- Management Entrepreneurship -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/18518 , vital:28656
- Description: The purpose of this research study is to assess the extent to which intrapreneurship is practised at the South African Institute of Chartered Accountants (SAICA), which operates as a non-profit organisation. The importance of intrapreneurship should not be taken lightly if organisations are to remain competitive. Human capital is considered a key resource in the provision of innovation which results in availing products and services to customers so as to remain relevant and make profits or achieve the different strategic objectives of organisations. This research constituted the collection and quantitative analysis of two data sets. The first data set was gathered through a structured questionnaire that assessed 13 constructs, which measured the intrapreneurial climate at SAICA. The second data set focused on assessing and measuring 20 intrapreneurial characteristics and was generated through self-completed questionnaires. The questionnaires were sent to 112 employees through an online tool and a total of 57 questionnaires were completed and analysed. The findings indicate that intrapreneurship at SAICA is poorly and inadequately performed. There is a general perception that there is no tolerance for risk, mistakes and failure and that the rewards and reinforcement are poorly implemented. The relationship between superiors and staff is skewed thus creating a culture of fear to make mistakes or to speak openly. The following recommendations were suggested: Encourage superiors to engage with staff and support intrapreneurship through appropriate reward systems and reinforcement; encourage superiors to promote innovation by increasing tolerance to mistakes and risk. This could also be achieved by allowing staff to use their abilities to contribute to decision making; Increase awareness about intrapreneurship among staff in order to motivate individuals; Use existing structures such as the employment equity committees, departmental steward meetings as well as employee forums to improve trust between superiors and staff.
- Full Text:
- Date Issued: 2017
Introduction: Researching sustainable development learning pathways towards progression in learning and work
- Lotz-Sisitka, Heila, Ramsarup, Preesha, Bolton, Heidi
- Authors: Lotz-Sisitka, Heila , Ramsarup, Preesha , Bolton, Heidi
- Date: 2017
- Subjects: To be catalogued
- Language: English
- Type: text , bulletin
- Identifier: http://hdl.handle.net/10962/436401 , vital:73269 , ISBN bulletin , https://www.saqa.org.za/wp-content/uploads/2023/02/SAQA-Bulletin-2017-1.pdf#page=37
- Description: Environment and sustainable development issues are increasingly seen as complex, multi-faceted and integral to social and economic development, as can be seen from the recently proclaimed sustainable development goals (www.globalgoals.org1 ). As societies grapple with the rapid and catastrophic effects of environmental degradation, anthropogenic earth system change and a long history of unsustainable development, educa-tional systems have had to attempt to comprehend meaningfully, the im-plications. Within post-apartheid South Africa, these challenges are mark-edly more complex. In a country facing fundamental national transfor-mation on every front, the environment and sustainable development discourses are raising significant new challenges for work and learning systems.
- Full Text:
- Date Issued: 2017
- Authors: Lotz-Sisitka, Heila , Ramsarup, Preesha , Bolton, Heidi
- Date: 2017
- Subjects: To be catalogued
- Language: English
- Type: text , bulletin
- Identifier: http://hdl.handle.net/10962/436401 , vital:73269 , ISBN bulletin , https://www.saqa.org.za/wp-content/uploads/2023/02/SAQA-Bulletin-2017-1.pdf#page=37
- Description: Environment and sustainable development issues are increasingly seen as complex, multi-faceted and integral to social and economic development, as can be seen from the recently proclaimed sustainable development goals (www.globalgoals.org1 ). As societies grapple with the rapid and catastrophic effects of environmental degradation, anthropogenic earth system change and a long history of unsustainable development, educa-tional systems have had to attempt to comprehend meaningfully, the im-plications. Within post-apartheid South Africa, these challenges are mark-edly more complex. In a country facing fundamental national transfor-mation on every front, the environment and sustainable development discourses are raising significant new challenges for work and learning systems.
- Full Text:
- Date Issued: 2017
Invasion status and potential impacts of bluegill Lepomis macrochirus Rafinesque, 1819 in the Kariega River, Eastern Cape, South Africa
- Authors: Ndaleni, Phumza Malibongwe
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/7586 , vital:21276
- Description: The impact of alien invasive species is one of the greatest threats to biodiversity globally. All of the major drainages of South Africa are invaded by non-native fishes, yet little information is available on their impact. This thesis focusses on providing a better understanding of the potential impacts of bluegill Lepomis macrochirus Rafinesque, 1819, a species introduced into South Africa from the USA in 1938. The study assesses the distribution, establishment success and feeding ecology of L. macrochirus in an invaded South African River system in order to better understand and document its potential impacts. Specifically; this thesis (1) assesses the distribution and relative abundance of L. macrochirus in the Kariega System of the Eastern Cape, (2) determines the diet of the species in one of the major impoundments of the system, and (3) uses an experimental comparative functional response approach to assess whether this species has heightened predatory capabilities when compared with fishes with which it cooccurs. Ninety-six sites in the Kariega River system were sampled from the headwaters down to the estuary. Small native fish species (Enteromius anoplus and Enteromius pallidus) occurred mostly in the upper reaches, while in the middle and lower reaches, the centrarchid alien largemouth bass Micropterus salmoides and bluegill L. mocrochirus dominated. There was overlap between the centrarchids and introduced banded tilapia Tilapia sparrmanii and southern mouthbrooder Pseudocrenilabrus philander, but never with small-bodied native species. The stomach contents of L. macrochirus were examined during winter and summer and prey were identified to family level. Crustaceans and insects were an important component in their diet, but in summer fish eggs were common. Comparisons of bluegill diet with published literature indicated that there was potential for competition with largemouth bass, banded tilapia and southern mouthbrooder. Feeding experiments were conducted to compare the functional responses of these four species using a common prey item. Banded tilapia had significantly lower attack rates than the other species with no significant difference observed in other species. Bluegill has a similar impact to that of banded tilapia and southern mouthbrooder, but lower than that of largemouth bass. Results of the present study highlight that L. macrochirus introduced into dams will likely result in both upstream and downstream invasion of river systems. It is likely that this species does not, however, have as much of a predatory impact as M. salmoides in that its predatory capacity is relatively reduced and more comparable to South African native cichlids. These results are discussed within the context of invasion success/failure in other regions of southern Africa.
- Full Text:
- Date Issued: 2017
- Authors: Ndaleni, Phumza Malibongwe
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/7586 , vital:21276
- Description: The impact of alien invasive species is one of the greatest threats to biodiversity globally. All of the major drainages of South Africa are invaded by non-native fishes, yet little information is available on their impact. This thesis focusses on providing a better understanding of the potential impacts of bluegill Lepomis macrochirus Rafinesque, 1819, a species introduced into South Africa from the USA in 1938. The study assesses the distribution, establishment success and feeding ecology of L. macrochirus in an invaded South African River system in order to better understand and document its potential impacts. Specifically; this thesis (1) assesses the distribution and relative abundance of L. macrochirus in the Kariega System of the Eastern Cape, (2) determines the diet of the species in one of the major impoundments of the system, and (3) uses an experimental comparative functional response approach to assess whether this species has heightened predatory capabilities when compared with fishes with which it cooccurs. Ninety-six sites in the Kariega River system were sampled from the headwaters down to the estuary. Small native fish species (Enteromius anoplus and Enteromius pallidus) occurred mostly in the upper reaches, while in the middle and lower reaches, the centrarchid alien largemouth bass Micropterus salmoides and bluegill L. mocrochirus dominated. There was overlap between the centrarchids and introduced banded tilapia Tilapia sparrmanii and southern mouthbrooder Pseudocrenilabrus philander, but never with small-bodied native species. The stomach contents of L. macrochirus were examined during winter and summer and prey were identified to family level. Crustaceans and insects were an important component in their diet, but in summer fish eggs were common. Comparisons of bluegill diet with published literature indicated that there was potential for competition with largemouth bass, banded tilapia and southern mouthbrooder. Feeding experiments were conducted to compare the functional responses of these four species using a common prey item. Banded tilapia had significantly lower attack rates than the other species with no significant difference observed in other species. Bluegill has a similar impact to that of banded tilapia and southern mouthbrooder, but lower than that of largemouth bass. Results of the present study highlight that L. macrochirus introduced into dams will likely result in both upstream and downstream invasion of river systems. It is likely that this species does not, however, have as much of a predatory impact as M. salmoides in that its predatory capacity is relatively reduced and more comparable to South African native cichlids. These results are discussed within the context of invasion success/failure in other regions of southern Africa.
- Full Text:
- Date Issued: 2017
Invasive alien plants and rural livelihoods: a case of Gwanda District, Zimbabwe
- Authors: Dube, Nqobizitha
- Date: 2017
- Subjects: Cylindropuntia fulgida , Invasive plants -- Economic aspects , Invasive plants -- Control , Invasive plants -- Economic aspects -- Zimbabwe , Ecosystem services -- Zimbabwe , Environmental policy -- Zimbabwe , Ecosystem management -- Zimbabwe , Cactus -- Economic aspects -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/4368 , vital:20653
- Description: Biodiversity is the cornerstone of ecosystem functioning and the realisation that most rural African community livelihoods are directly dependent on ecosystem goods and services warrants its conservation. Invasive alien plants threaten biodiversity and compromise the ecosystem's ability to provide goods and services for rural communities, thereby negatively affecting livelihood strategies. Information on IAPs is lacking in most African countries, thus, the livelihood effects of Invasive Alien Plants (IAPs) are not clearly understood. In Zimbabwe, Cylindropuntia fulgida var. fulgida (Cff) has invaded Gwanda district in the Matabeleland south province compromising local household capital assets that contribute to livelihood strategies and altering the ecosystem. This study exposed the rural worldview of the environment, the effect that Cff has on local livelihood strategies and the effectiveness environmental management institutions in rural Gwanda district. The study followed a post positivist paradigm. The impacts of IAPs on rural communities in Zimbabwe were analysed by looking at the livelihood stresses that arise because of Cff. The research used multi-stage sampling to select a representative sample of respondents. Primary data was collected using semi-structured questionnaires, group discussion and key informant guides. Furthermore, document analysis was conducted to collect secondary data. The data analysis process used Computer packages Microsoft Excel, SPSS and NVIVO. Results showed that livelihood benefits that species in the natural environment provide strongly influence environmental perceptions of rural African communities. Additionally, the study showed that Cff compromises the local ecosystem and reduces its ability to support the dominant livelihoods in the study area. The long-term result of such a situation in the absence of control is increased poverty and the failure to realise sustainable development. However, results indicated that IAPs could also improve the poverty situation of a community before they have reached the threshold points. It is therefore imperative to know the threshold points of an invasive plant in order to ascertain the efficient point to intervene. The study also showed that benefits of invasive plants accrue to different members of a society at different times (private/public). This knowledge allows the adoption of efficient and effective control strategies.
- Full Text:
- Date Issued: 2017
- Authors: Dube, Nqobizitha
- Date: 2017
- Subjects: Cylindropuntia fulgida , Invasive plants -- Economic aspects , Invasive plants -- Control , Invasive plants -- Economic aspects -- Zimbabwe , Ecosystem services -- Zimbabwe , Environmental policy -- Zimbabwe , Ecosystem management -- Zimbabwe , Cactus -- Economic aspects -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/4368 , vital:20653
- Description: Biodiversity is the cornerstone of ecosystem functioning and the realisation that most rural African community livelihoods are directly dependent on ecosystem goods and services warrants its conservation. Invasive alien plants threaten biodiversity and compromise the ecosystem's ability to provide goods and services for rural communities, thereby negatively affecting livelihood strategies. Information on IAPs is lacking in most African countries, thus, the livelihood effects of Invasive Alien Plants (IAPs) are not clearly understood. In Zimbabwe, Cylindropuntia fulgida var. fulgida (Cff) has invaded Gwanda district in the Matabeleland south province compromising local household capital assets that contribute to livelihood strategies and altering the ecosystem. This study exposed the rural worldview of the environment, the effect that Cff has on local livelihood strategies and the effectiveness environmental management institutions in rural Gwanda district. The study followed a post positivist paradigm. The impacts of IAPs on rural communities in Zimbabwe were analysed by looking at the livelihood stresses that arise because of Cff. The research used multi-stage sampling to select a representative sample of respondents. Primary data was collected using semi-structured questionnaires, group discussion and key informant guides. Furthermore, document analysis was conducted to collect secondary data. The data analysis process used Computer packages Microsoft Excel, SPSS and NVIVO. Results showed that livelihood benefits that species in the natural environment provide strongly influence environmental perceptions of rural African communities. Additionally, the study showed that Cff compromises the local ecosystem and reduces its ability to support the dominant livelihoods in the study area. The long-term result of such a situation in the absence of control is increased poverty and the failure to realise sustainable development. However, results indicated that IAPs could also improve the poverty situation of a community before they have reached the threshold points. It is therefore imperative to know the threshold points of an invasive plant in order to ascertain the efficient point to intervene. The study also showed that benefits of invasive plants accrue to different members of a society at different times (private/public). This knowledge allows the adoption of efficient and effective control strategies.
- Full Text:
- Date Issued: 2017
Investigating adaptation strategies to climate change by smallholder farmers : evidence from, Lesotho
- Authors: Morahanye, Mokhantso Lilian
- Date: 2017
- Subjects: Climatic changes -- South Africa Farms, Small -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/5807 , vital:29397
- Description: In Lesotho, agriculture is the dominant activity and involves crop and livestock production, range management and forestry activities. The current climatic variability in the country has caused decline in food production as result of increased dry spells, frequency of droughts and erratic rainfall. These climatic events are expected to have a significant impact on the livelihoods of the smallholder farmers. In combatting the harmful effects of climate change, smallholder farmers in Lesotho have employed various adaptation strategies based on their local knowledge and limited means. While these strategies may not be optimal they obviously constitute the basis for potentially effective improved technologies which can be developed and communicated through an efficient extension system, hence the need to precisely identify them and understand the factors that affect their choice. The main objective of this study was therefore, to identify the adaptation strategies and investigate the factors influencing smallholder farmers’ choice of those adaptation strategies. The study made use of multi-stage stratified sampling technique to select 160 respondents across four agro-ecological zones (lowlands, highlands, foothills and Senqu River Valley) in Leribe and Mohales’Hoek districts of Lesotho. Primary data for the study were collected using semi - structured questionnaire assisted with interview schedules administered on the respondents. Data collected were analysed using descriptive statistics and the multinomial logistics regression model. The results show that there are more males than females, majority of the respondents’ attained primary education, and older people dominate the smallholder farming system. The adaptation strategies used in MNL model were soil and water management, crop management and livestock management. The results further revealed that soil and water management strategies were the most adopted climate change strategies amongst smallholder farmers. It is understood that marital status, age and gender, income, land tenure, crop grown, extension services, and agro-ecological zones are the determinant factors influencing the choice of the adaptation strategies. This study concludes by recommending that smallholder farmers should be sensitised about climate change and both government and non-government organisations working on climate change related issues should direct their attention to rural communities to ensure effective response to climate change.
- Full Text:
- Date Issued: 2017
- Authors: Morahanye, Mokhantso Lilian
- Date: 2017
- Subjects: Climatic changes -- South Africa Farms, Small -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/5807 , vital:29397
- Description: In Lesotho, agriculture is the dominant activity and involves crop and livestock production, range management and forestry activities. The current climatic variability in the country has caused decline in food production as result of increased dry spells, frequency of droughts and erratic rainfall. These climatic events are expected to have a significant impact on the livelihoods of the smallholder farmers. In combatting the harmful effects of climate change, smallholder farmers in Lesotho have employed various adaptation strategies based on their local knowledge and limited means. While these strategies may not be optimal they obviously constitute the basis for potentially effective improved technologies which can be developed and communicated through an efficient extension system, hence the need to precisely identify them and understand the factors that affect their choice. The main objective of this study was therefore, to identify the adaptation strategies and investigate the factors influencing smallholder farmers’ choice of those adaptation strategies. The study made use of multi-stage stratified sampling technique to select 160 respondents across four agro-ecological zones (lowlands, highlands, foothills and Senqu River Valley) in Leribe and Mohales’Hoek districts of Lesotho. Primary data for the study were collected using semi - structured questionnaire assisted with interview schedules administered on the respondents. Data collected were analysed using descriptive statistics and the multinomial logistics regression model. The results show that there are more males than females, majority of the respondents’ attained primary education, and older people dominate the smallholder farming system. The adaptation strategies used in MNL model were soil and water management, crop management and livestock management. The results further revealed that soil and water management strategies were the most adopted climate change strategies amongst smallholder farmers. It is understood that marital status, age and gender, income, land tenure, crop grown, extension services, and agro-ecological zones are the determinant factors influencing the choice of the adaptation strategies. This study concludes by recommending that smallholder farmers should be sensitised about climate change and both government and non-government organisations working on climate change related issues should direct their attention to rural communities to ensure effective response to climate change.
- Full Text:
- Date Issued: 2017
Investigating herbivory and plant origin on tall-statured grasses in South Africa
- Authors: Canavan, Kim
- Date: 2017
- Subjects: Insects as biological pest control agents -- South Africa , Arundo donax , Giant reed -- South Africa , Giant reed -- Biological control -- South Africa , Phragmites australis , Phragmites mauritianus , Phragmites , Tetramesa romana , Biological invasions -- South Africa , Wasps -- Host plants , Wasps -- South Africa
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/6147 , vital:21051
- Description: South African riparian zones have been heavily degraded through anthropogenic activities such as dam construction and extraction of water for irrigation, which has resulted in a loss of ecosystem services and functioning. A consequence of such disturbances to riparian areas is in their susceptibility to invasive alien species (IAS). One such IAS is the giant reed, Arundo donax L. (Poaceae), introduced to South Africa in the 1700s largely for erosion control. Arundo donax has since greatly expanded in the country and is now one of the most abundant IAS. Arundo donax has been found to displace native vegetation and in South Africa this will most likely lead to the displacement of the native tall-statured grasses, Phragmites australis (Cav.) Trin. ex Steud. and Phragmites mauritianus Kunth. This study aimed to enhance our understanding of the tall-statured grasses A. donax, P. australis and P. mauritianus to better manage them in riparian areas. For A. donax, biological control is seen as the most viable option to control stands in the long-term. However, before such a programme is put in place, it is important to first collect baseline data that can be used to guide the direction of the biological control project in South Africa. For the Phragmites spp., despite being a dominant vegetative type in riparian areas, very little is known about their status in South Africa. Furthermore, there have been increasing reports of both Phragmites species having an expansion of their range and abundance. In North America, there has been a similar trend of reed expansion and through molecular work it was determined that a cryptic invasion has occurred with the introduction of an invasive non-native haplotype from Europe. It is therefore unknown if Phragmites spp. populations are expanding due to anthropogenic activities or due to a cryptic invasion. To address these shortfalls in knowledge the study investigated the tall-statured grasses in two parts; firstly, molecular techniques are used to explore the plant origin and genetic diversity of A. donax, P. australis and P. mauritianus and secondly using the Enemy Release Hypothesis as a framework, herbivore assemblages for each reed was determined across their distribution in South Africa. Molecular-techniques determined that both P. australis and P. mauritianus had only one haplotype - known as haplotype K and haplotype V respectively, across their distribution. For P. australis, haplotype K shares a close connection with populations from a Mediterranean lineage and this was further confirmed with a shared grass-waxy band. The direction and timing of genetic exchange between the two regions could not be ascertained and thus still remains unknown. Microsatellite analysis determined that both Phragmites spp. had a high genetic diversity compared to worldwide lineages. With no evidence of any cryptic invasions of haplotypes from other regions, both Phragmites spp. populations are likely to be native to South Africa. For A. donax all populations across South Africa were determined to be haplotype M1; a cosmopolitan haplotype that has an ancient native range in Afghanistan and Pakistan (Indus Valley). Populations were found to have no genetic diversity and thus can be considered one clone. A pre-introductory survey determined a list of herbivores associated with each tall- statured grass. For A. donax, a total of seven herbivores were found. Of these, one herbivore, a galling wasp, Tetramesa romana Walker (Hymenoptera: Eurytomidae) was found to be highly abundant and widely distributed in South Africa. Tetramesa romana is already a biological control agent in North America and thus is likely exerting some pressure on A. donax populations in South Africa. For both Phragmites spp. a total of ten herbivores were found, although having higher species richness compared to A. donax, when compared to other regions, these native species have a relatively low species richness. Providing baseline data on plant origin, genetic diversity and herbivory on A. donax, P. australis and P. mauritianus has provided important information on managing these species in riparian ecosystems in South Africa. For the Phragmites spp. with no evidence of any cryptic invasions, it is recommended that reed stands continue to be managed as native species. Phragmites spp. are important dominant vegetative species and thus should be protected; however, if reed stands become expansive, control methods can be put in place to focus on managing spread and abundance. For A. donax, this study was able to provide pivotal information in guiding the biological control programme. By determining the ancient lineage of South African populations, research can be focused in this area to find potential biological control agents. Lastly, the pre-introductory survey determined that a biological control agent, T. romana was already established with an unknown introduction and also highlighted potential plant parts that should be targeted. In particular, no rhizome feeding herbivores were found in South Africa and therefore this highlights an important niche that should be explored in biological control agents.
- Full Text:
- Date Issued: 2017
- Authors: Canavan, Kim
- Date: 2017
- Subjects: Insects as biological pest control agents -- South Africa , Arundo donax , Giant reed -- South Africa , Giant reed -- Biological control -- South Africa , Phragmites australis , Phragmites mauritianus , Phragmites , Tetramesa romana , Biological invasions -- South Africa , Wasps -- Host plants , Wasps -- South Africa
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/6147 , vital:21051
- Description: South African riparian zones have been heavily degraded through anthropogenic activities such as dam construction and extraction of water for irrigation, which has resulted in a loss of ecosystem services and functioning. A consequence of such disturbances to riparian areas is in their susceptibility to invasive alien species (IAS). One such IAS is the giant reed, Arundo donax L. (Poaceae), introduced to South Africa in the 1700s largely for erosion control. Arundo donax has since greatly expanded in the country and is now one of the most abundant IAS. Arundo donax has been found to displace native vegetation and in South Africa this will most likely lead to the displacement of the native tall-statured grasses, Phragmites australis (Cav.) Trin. ex Steud. and Phragmites mauritianus Kunth. This study aimed to enhance our understanding of the tall-statured grasses A. donax, P. australis and P. mauritianus to better manage them in riparian areas. For A. donax, biological control is seen as the most viable option to control stands in the long-term. However, before such a programme is put in place, it is important to first collect baseline data that can be used to guide the direction of the biological control project in South Africa. For the Phragmites spp., despite being a dominant vegetative type in riparian areas, very little is known about their status in South Africa. Furthermore, there have been increasing reports of both Phragmites species having an expansion of their range and abundance. In North America, there has been a similar trend of reed expansion and through molecular work it was determined that a cryptic invasion has occurred with the introduction of an invasive non-native haplotype from Europe. It is therefore unknown if Phragmites spp. populations are expanding due to anthropogenic activities or due to a cryptic invasion. To address these shortfalls in knowledge the study investigated the tall-statured grasses in two parts; firstly, molecular techniques are used to explore the plant origin and genetic diversity of A. donax, P. australis and P. mauritianus and secondly using the Enemy Release Hypothesis as a framework, herbivore assemblages for each reed was determined across their distribution in South Africa. Molecular-techniques determined that both P. australis and P. mauritianus had only one haplotype - known as haplotype K and haplotype V respectively, across their distribution. For P. australis, haplotype K shares a close connection with populations from a Mediterranean lineage and this was further confirmed with a shared grass-waxy band. The direction and timing of genetic exchange between the two regions could not be ascertained and thus still remains unknown. Microsatellite analysis determined that both Phragmites spp. had a high genetic diversity compared to worldwide lineages. With no evidence of any cryptic invasions of haplotypes from other regions, both Phragmites spp. populations are likely to be native to South Africa. For A. donax all populations across South Africa were determined to be haplotype M1; a cosmopolitan haplotype that has an ancient native range in Afghanistan and Pakistan (Indus Valley). Populations were found to have no genetic diversity and thus can be considered one clone. A pre-introductory survey determined a list of herbivores associated with each tall- statured grass. For A. donax, a total of seven herbivores were found. Of these, one herbivore, a galling wasp, Tetramesa romana Walker (Hymenoptera: Eurytomidae) was found to be highly abundant and widely distributed in South Africa. Tetramesa romana is already a biological control agent in North America and thus is likely exerting some pressure on A. donax populations in South Africa. For both Phragmites spp. a total of ten herbivores were found, although having higher species richness compared to A. donax, when compared to other regions, these native species have a relatively low species richness. Providing baseline data on plant origin, genetic diversity and herbivory on A. donax, P. australis and P. mauritianus has provided important information on managing these species in riparian ecosystems in South Africa. For the Phragmites spp. with no evidence of any cryptic invasions, it is recommended that reed stands continue to be managed as native species. Phragmites spp. are important dominant vegetative species and thus should be protected; however, if reed stands become expansive, control methods can be put in place to focus on managing spread and abundance. For A. donax, this study was able to provide pivotal information in guiding the biological control programme. By determining the ancient lineage of South African populations, research can be focused in this area to find potential biological control agents. Lastly, the pre-introductory survey determined that a biological control agent, T. romana was already established with an unknown introduction and also highlighted potential plant parts that should be targeted. In particular, no rhizome feeding herbivores were found in South Africa and therefore this highlights an important niche that should be explored in biological control agents.
- Full Text:
- Date Issued: 2017
Investigating how Grade 10 Physical Science teachers help learners to make sense of concepts of electromagnetism using easily accessible materials in under-resourced schools
- Authors: Samuel, Paulo
- Date: 2017
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/8143 , vital:21359
- Description: This study sought to explore teachers’ perceptions and experiences of using easily accessible materials and how they might collaboratively develop learning and teaching support materials using easily accessible materials. The study explored three aspects. Firstly, the views, experiences and factors which influence grade 10 Physical Science teachers’ perceptions and experiences of teaching the topic of electromagnetism. Secondly, to find out what teachers can do to improve teaching and learning of electromagnetism in grade 10 Physical Science using easily accessible materials. Thirdly, to look at what enables or constrains grade 10 Physical Science teachers in under-resourced schools when dealing with electromagnetism, from using easily accessible materials. A qualitative method approach was adopted, underpinned by an interpretive paradigm but using some quantitative methods as well. Within the interpretive paradigm a case study approach was used. The study was carried out in Swakopmund and Gobabis education circuits of the Erongo and Omaheke Regions respectively. Data were collected using questionnaires, lesson observations and stimulated-recall interviews. The data obtained were validated in two ways, firstly, by triangulation from different data gathering techniques, and secondly, validation was done by member checking of the transcripts. To make meaning from the data generated, Vygotsky’s (1978) socio-cultural theory was used as a lens to analyse the data. The quantitative data generated were presented in figures, tables; whereas the qualitative data were coded inductively into descriptive texts to make meaning. It was found that teachers’s perceptions and experiences are that the topic of electromagnetism is quite challenging. Teachers reported that their learners find it difficult to comprehend phenomena associated with electromagnetism, thus making it difficult for their learners to grasp concepts associated with it. Lack of resources to do practical activities in the topic of electromagnetism was found to be a major contributing factor to teaching and learning of this topic. The use of easily accessible materials among teachers was found to be very limited. Easily accessible locally sourced materials were found to have the potential to enable grade 10 Physical Science teachers to help learners to make sense of concepts of electromagnetism in under-resourced schools. In light of the above findings, the study recommends that science teachers should make use of easily accessible materials which can minimise their dependence on standard laboratory equipment which is unaffordable anyway by most schools.
- Full Text:
- Date Issued: 2017
- Authors: Samuel, Paulo
- Date: 2017
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/8143 , vital:21359
- Description: This study sought to explore teachers’ perceptions and experiences of using easily accessible materials and how they might collaboratively develop learning and teaching support materials using easily accessible materials. The study explored three aspects. Firstly, the views, experiences and factors which influence grade 10 Physical Science teachers’ perceptions and experiences of teaching the topic of electromagnetism. Secondly, to find out what teachers can do to improve teaching and learning of electromagnetism in grade 10 Physical Science using easily accessible materials. Thirdly, to look at what enables or constrains grade 10 Physical Science teachers in under-resourced schools when dealing with electromagnetism, from using easily accessible materials. A qualitative method approach was adopted, underpinned by an interpretive paradigm but using some quantitative methods as well. Within the interpretive paradigm a case study approach was used. The study was carried out in Swakopmund and Gobabis education circuits of the Erongo and Omaheke Regions respectively. Data were collected using questionnaires, lesson observations and stimulated-recall interviews. The data obtained were validated in two ways, firstly, by triangulation from different data gathering techniques, and secondly, validation was done by member checking of the transcripts. To make meaning from the data generated, Vygotsky’s (1978) socio-cultural theory was used as a lens to analyse the data. The quantitative data generated were presented in figures, tables; whereas the qualitative data were coded inductively into descriptive texts to make meaning. It was found that teachers’s perceptions and experiences are that the topic of electromagnetism is quite challenging. Teachers reported that their learners find it difficult to comprehend phenomena associated with electromagnetism, thus making it difficult for their learners to grasp concepts associated with it. Lack of resources to do practical activities in the topic of electromagnetism was found to be a major contributing factor to teaching and learning of this topic. The use of easily accessible materials among teachers was found to be very limited. Easily accessible locally sourced materials were found to have the potential to enable grade 10 Physical Science teachers to help learners to make sense of concepts of electromagnetism in under-resourced schools. In light of the above findings, the study recommends that science teachers should make use of easily accessible materials which can minimise their dependence on standard laboratory equipment which is unaffordable anyway by most schools.
- Full Text:
- Date Issued: 2017
Investigating public participation strategies in the provision of low-income housing in the Buffalo City Metropolitan Municipality
- Authors: Batyi, Thomas
- Date: 2017
- Subjects: Municipal government -- South Africa -- Eastern Cape -- Citizen participation , Municipal services -- South Africa -- Eastern Cape -- Citizen participation Low-income housing -- South Africa -- Eastern Cape Public housing -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/14543 , vital:27749
- Description: This study investigates the public participation strategies in the provision of low –income housing. The purpose is to look at the effectiveness of the public participation strategies. In order to achieve this goal, it was necessary to review literature on public participation to advance the argument that public participation is an integral part of local government and the community at large. Currently, public participation permeates all legislation, impacting on local government in South Africa. It enhances individual and group esteem and enables municipal functionaries to understand crucial issues that serve as an impetus for policymaking. A supportive objective was to identify challenges that may be experienced by the Buffalo City Metropolitan Municipality with public participation in low-cost houses. The study adopted qualitative data collection instruments, which were used to collect data. The face-to-face interviews with the total sample of this study consisted of fourteen (14) participants comprising six (6) municipal officials, (3 officials from each of the Public Participation and the Integrated Development Units) and four (4) ward councillors and committee members, one (1) each from wards 1, 6, 46 and 47. For the purpose of this study, purposive (non-probability) or judgemental sampling was used. The qualitative data was analysed thematically using coding and categorising data into themes. The findings of this study revealed that there is a lack of public participation by the local communities in development projects. Also, ward committees do not have a platform to participate at the representative forums and during the IDP/budget hearings. In this regard, the study made recommendations on the participation strategies in order to tackle the challenges faced in the provision of low-income housing.
- Full Text:
- Date Issued: 2017
- Authors: Batyi, Thomas
- Date: 2017
- Subjects: Municipal government -- South Africa -- Eastern Cape -- Citizen participation , Municipal services -- South Africa -- Eastern Cape -- Citizen participation Low-income housing -- South Africa -- Eastern Cape Public housing -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/14543 , vital:27749
- Description: This study investigates the public participation strategies in the provision of low –income housing. The purpose is to look at the effectiveness of the public participation strategies. In order to achieve this goal, it was necessary to review literature on public participation to advance the argument that public participation is an integral part of local government and the community at large. Currently, public participation permeates all legislation, impacting on local government in South Africa. It enhances individual and group esteem and enables municipal functionaries to understand crucial issues that serve as an impetus for policymaking. A supportive objective was to identify challenges that may be experienced by the Buffalo City Metropolitan Municipality with public participation in low-cost houses. The study adopted qualitative data collection instruments, which were used to collect data. The face-to-face interviews with the total sample of this study consisted of fourteen (14) participants comprising six (6) municipal officials, (3 officials from each of the Public Participation and the Integrated Development Units) and four (4) ward councillors and committee members, one (1) each from wards 1, 6, 46 and 47. For the purpose of this study, purposive (non-probability) or judgemental sampling was used. The qualitative data was analysed thematically using coding and categorising data into themes. The findings of this study revealed that there is a lack of public participation by the local communities in development projects. Also, ward committees do not have a platform to participate at the representative forums and during the IDP/budget hearings. In this regard, the study made recommendations on the participation strategies in order to tackle the challenges faced in the provision of low-income housing.
- Full Text:
- Date Issued: 2017