Versions of hospitality in recent writing on the fiction of JM Coetzee:
- Authors: Marais, Mike
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144039 , vital:38305 , DOI: 10.4314/eia.v40i1.8
- Description: In one of the interviews in Summertime, Martin, a former colleague, claims that he and the deceased John Coetzee felt their "presence" in South Africa "was legal but illegitimate," that it "was grounded in a crime, namely colonial conquest," which rendered them "sojourners, temporary residents, and to that extent without a home, without a homeland" (209-10). With this statement in mind, Maria J. Lopez argues that a sense of unbelonging underlies J. M. Coetzee's entire oeuvre, including the Australian fiction, and forms a kind of "imaginative and intellectual masterplot" (xii). ). It is this "narrative" that she traces in her monograph, starting with the early fiction and concluding with chapters on the fictionalised autobiographies and Australian fiction.
- Full Text:
- Date Issued: 2013
- Authors: Marais, Mike
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/144039 , vital:38305 , DOI: 10.4314/eia.v40i1.8
- Description: In one of the interviews in Summertime, Martin, a former colleague, claims that he and the deceased John Coetzee felt their "presence" in South Africa "was legal but illegitimate," that it "was grounded in a crime, namely colonial conquest," which rendered them "sojourners, temporary residents, and to that extent without a home, without a homeland" (209-10). With this statement in mind, Maria J. Lopez argues that a sense of unbelonging underlies J. M. Coetzee's entire oeuvre, including the Australian fiction, and forms a kind of "imaginative and intellectual masterplot" (xii). ). It is this "narrative" that she traces in her monograph, starting with the early fiction and concluding with chapters on the fictionalised autobiographies and Australian fiction.
- Full Text:
- Date Issued: 2013
An assessment of factors affecting distribution models: an FMCG perspective
- Reshalin, Kumesh Sivaram Jay
- Authors: Reshalin, Kumesh Sivaram Jay
- Date: 2013
- Subjects: Business logistics , Delivery of goods , Shipment of goods
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8907 , http://hdl.handle.net/10948/d1021024
- Description: The Fast Moving Consumer Goods (FMCG) industry in South Africa is now more than ever, facing a new era with strong competition and a need for innovative and sustainable distribution strategies to remain competitive in the market. Organisations are continuously searching for ways to increase their competitiveness and sustainability as markets change and develop, so do the strategies used to enter them. Organisations must therefore be able to choose the most effective approach to enter markets in order to remain competitive. Recent approaches require organisations to identify innovative distribution methods to meet consumer needs due to a considerable increase in competition, which makes it very difficult for organisations to differentiate their products solely on the basis of cost or quality. The research problem addressed in this study comprised an assessment of factors affecting distribution models from an FMCG perspective. This necessitated a comprehensive literature review of the various definitions, trends impacting on distribution as well as investigating the status relating to distribution models. Strategies and attributes of successful distribution models were evaluated to determine an effective distribution model to assist the organisation in challenging competition. The researcher found that a significant number of authors have suggested the following key attributes for a successful distribution model, namely operational excellence, performance management, strategic partnership, technology drivers, and relationship marketing. An empirical study was conducted after the appropriate measuring instrument was developed. The purpose of the measuring instrument was to validate the literature findings, identify the rank importance of the identified attributes and to evaluate the extent to which these factors are provided for in the organisation, based on the points above. The present study assessed innovation at Coca-Cola Fortune (Pty) Ltd., a local FMCG firm in an effort to develop a distribution model that would be successful for the company. The study comprised a sample of 40 Official Coca-Cola Distributors which form part of the distribution model of Coca-Cola Fortune (Pty) Ltd. Questionnaires were sent to each of the 40 Official Coca-Cola Distributors and a response rate of 100 percent was obtained. The major findings indicated that the respondents agreed with the literature in respect of the important attributes of a successful distribution model. Overall the majority of the respondents identified the distribution model between Coca-Cola Fortune and the Official Coca-Cola Distributors as a successful distribution model. The literature findings together with the empirical study findings resulted in the development of a strategic model to maintain a successful and competitive distribution model. The current investigation highlighted the overall perception of Coca-Cola Fortune’s distribution model and the importance of having a successful model. To sustain this distribution model the organisation must maintain the key attributes of a successful distribution model as identified in the literature to ensure competitiveness, sustainability and meeting changing consumer demands.
- Full Text:
- Date Issued: 2013
- Authors: Reshalin, Kumesh Sivaram Jay
- Date: 2013
- Subjects: Business logistics , Delivery of goods , Shipment of goods
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8907 , http://hdl.handle.net/10948/d1021024
- Description: The Fast Moving Consumer Goods (FMCG) industry in South Africa is now more than ever, facing a new era with strong competition and a need for innovative and sustainable distribution strategies to remain competitive in the market. Organisations are continuously searching for ways to increase their competitiveness and sustainability as markets change and develop, so do the strategies used to enter them. Organisations must therefore be able to choose the most effective approach to enter markets in order to remain competitive. Recent approaches require organisations to identify innovative distribution methods to meet consumer needs due to a considerable increase in competition, which makes it very difficult for organisations to differentiate their products solely on the basis of cost or quality. The research problem addressed in this study comprised an assessment of factors affecting distribution models from an FMCG perspective. This necessitated a comprehensive literature review of the various definitions, trends impacting on distribution as well as investigating the status relating to distribution models. Strategies and attributes of successful distribution models were evaluated to determine an effective distribution model to assist the organisation in challenging competition. The researcher found that a significant number of authors have suggested the following key attributes for a successful distribution model, namely operational excellence, performance management, strategic partnership, technology drivers, and relationship marketing. An empirical study was conducted after the appropriate measuring instrument was developed. The purpose of the measuring instrument was to validate the literature findings, identify the rank importance of the identified attributes and to evaluate the extent to which these factors are provided for in the organisation, based on the points above. The present study assessed innovation at Coca-Cola Fortune (Pty) Ltd., a local FMCG firm in an effort to develop a distribution model that would be successful for the company. The study comprised a sample of 40 Official Coca-Cola Distributors which form part of the distribution model of Coca-Cola Fortune (Pty) Ltd. Questionnaires were sent to each of the 40 Official Coca-Cola Distributors and a response rate of 100 percent was obtained. The major findings indicated that the respondents agreed with the literature in respect of the important attributes of a successful distribution model. Overall the majority of the respondents identified the distribution model between Coca-Cola Fortune and the Official Coca-Cola Distributors as a successful distribution model. The literature findings together with the empirical study findings resulted in the development of a strategic model to maintain a successful and competitive distribution model. The current investigation highlighted the overall perception of Coca-Cola Fortune’s distribution model and the importance of having a successful model. To sustain this distribution model the organisation must maintain the key attributes of a successful distribution model as identified in the literature to ensure competitiveness, sustainability and meeting changing consumer demands.
- Full Text:
- Date Issued: 2013
Updating the ionospheric propagation factor, M(3000)F2, global model using the neural network technique and relevant geophysical input parameters
- Oronsaye, Samuel Iyen Jeffrey
- Authors: Oronsaye, Samuel Iyen Jeffrey
- Date: 2013
- Subjects: Neural networks (Computer science) , Ionospheric radio wave propagation , Ionosphere , Geophysics , Ionosondes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5434 , http://hdl.handle.net/10962/d1001609 , Neural networks (Computer science) , Ionospheric radio wave propagation , Ionosphere , Geophysics , Ionosondes
- Description: This thesis presents an update to the ionospheric propagation factor, M(3000)F2, global empirical model developed by Oyeyemi et al. (2007) (NNO). An additional aim of this research was to produce the updated model in a form that could be used within the International Reference Ionosphere (IRI) global model without adding to the complexity of the IRI. M(3000)F2 is the highest frequency at which a radio signal can be received over a distance of 3000 km after reflection in the ionosphere. The study employed the artificial neural network (ANN) technique using relevant geophysical input parameters which are known to influence the M(3000)F2 parameter. Ionosonde data from 135 ionospheric stations globally, including a number of equatorial stations, were available for this work. M(3000)F2 hourly values from 1976 to 2008, spanning all periods of low and high solar activity were used for model development and verification. A preliminary investigation was first carried out using a relatively small dataset to determine the appropriate input parameters for global M(3000)F2 parameter modelling. Inputs representing diurnal variation, seasonal variation, solar variation, modified dip latitude, longitude and latitude were found to be the optimum parameters for modelling the diurnal and seasonal variations of the M(3000)F2 parameter both on a temporal and spatial basis. The outcome of the preliminary study was applied to the overall dataset to develop a comprehensive ANN M(3000)F2 model which displays a remarkable improvement over the NNO model as well as the IRI version. The model shows 7.11% and 3.85% improvement over the NNO model as well as 13.04% and 10.05% over the IRI M(3000)F2 model, around high and low solar activity periods respectively. A comparison of the diurnal structure of the ANN and the IRI predicted values reveal that the ANN model is more effective in representing the diurnal structure of the M(3000)F2 values than the IRI M(3000)F2 model. The capability of the ANN model in reproducing the seasonal variation pattern of the M(3000)F2 values at 00h00UT, 06h00UT, 12h00UT, and l8h00UT more appropriately than the IRI version is illustrated in this work. A significant result obtained in this study is the ability of the ANN model in improving the post-sunset predicted values of the M(3000)F2 parameter which is known to be problematic to the IRI M(3000)F2 model in the low-latitude and the equatorial regions. The final M(3000)F2 model provides for an improved equatorial prediction and a simplified input space that allows for easy incorporation into the IRI model.
- Full Text:
- Date Issued: 2013
- Authors: Oronsaye, Samuel Iyen Jeffrey
- Date: 2013
- Subjects: Neural networks (Computer science) , Ionospheric radio wave propagation , Ionosphere , Geophysics , Ionosondes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5434 , http://hdl.handle.net/10962/d1001609 , Neural networks (Computer science) , Ionospheric radio wave propagation , Ionosphere , Geophysics , Ionosondes
- Description: This thesis presents an update to the ionospheric propagation factor, M(3000)F2, global empirical model developed by Oyeyemi et al. (2007) (NNO). An additional aim of this research was to produce the updated model in a form that could be used within the International Reference Ionosphere (IRI) global model without adding to the complexity of the IRI. M(3000)F2 is the highest frequency at which a radio signal can be received over a distance of 3000 km after reflection in the ionosphere. The study employed the artificial neural network (ANN) technique using relevant geophysical input parameters which are known to influence the M(3000)F2 parameter. Ionosonde data from 135 ionospheric stations globally, including a number of equatorial stations, were available for this work. M(3000)F2 hourly values from 1976 to 2008, spanning all periods of low and high solar activity were used for model development and verification. A preliminary investigation was first carried out using a relatively small dataset to determine the appropriate input parameters for global M(3000)F2 parameter modelling. Inputs representing diurnal variation, seasonal variation, solar variation, modified dip latitude, longitude and latitude were found to be the optimum parameters for modelling the diurnal and seasonal variations of the M(3000)F2 parameter both on a temporal and spatial basis. The outcome of the preliminary study was applied to the overall dataset to develop a comprehensive ANN M(3000)F2 model which displays a remarkable improvement over the NNO model as well as the IRI version. The model shows 7.11% and 3.85% improvement over the NNO model as well as 13.04% and 10.05% over the IRI M(3000)F2 model, around high and low solar activity periods respectively. A comparison of the diurnal structure of the ANN and the IRI predicted values reveal that the ANN model is more effective in representing the diurnal structure of the M(3000)F2 values than the IRI M(3000)F2 model. The capability of the ANN model in reproducing the seasonal variation pattern of the M(3000)F2 values at 00h00UT, 06h00UT, 12h00UT, and l8h00UT more appropriately than the IRI version is illustrated in this work. A significant result obtained in this study is the ability of the ANN model in improving the post-sunset predicted values of the M(3000)F2 parameter which is known to be problematic to the IRI M(3000)F2 model in the low-latitude and the equatorial regions. The final M(3000)F2 model provides for an improved equatorial prediction and a simplified input space that allows for easy incorporation into the IRI model.
- Full Text:
- Date Issued: 2013
A teaching case study of the strategic alignment of business strategy and information technology strategy at Nedbank
- Authors: Tsoaeli, Tebalo
- Date: 2013
- Subjects: Nedbank Banks and banking -- South Africa Business planning Information technology
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:720 , http://hdl.handle.net/10962/d1001883
- Description: In today’s business world, a lot of organizations are investing heavily in Information Technology (IT) in order to develop a competitive edge. According to Loukis, Sapounas and Milionis (2009:85) “firms all over the world make significant investments in IT aiming to increase their efficiency and effectiveness”. According to Cline and Guynes (2001:10), “during the last 30 years, IT has become an increasingly integral part of business operations”. Most of the times, organizations fail to get real value from the investments made in IT. This is mainly due to the fact that organizations fail to realize the value brought about by aligning IT strategy with Business strategy. Hu and Huang (2004:60) state that “each year organizations invest in IT to improve their competitive advantage and ultimately their business performance; however, more often than not, the anticipated benefits of IT investments fail to materialize due to misalignment of or lack of alignment, between the business and IT strategies”. Henderson and Venkatraman (1999:475) emphasize that “alignment is a desired state for organizations investing in IT that is not always achieved, as it often entails a radical change in the way managers consider IT”. It is through the alignment of IT strategy and Business strategy that organizations are able to realize the value brought about by investing in IT. Papp (2001:20)illustrates that “misalignment can cause problems with not only the development and integration of business and IT strategies, but can actually prevent IT from being fully leveraged to its maximum potential within an organization”. An organization that realizes the value of aligning IT strategy and Business strategy is able to develop a competitive advantage over its competitors. According to Daneshvar and Ramesh (2010:1) “each organization is aware of the special effects, benefits and implication of IT in business performance and also its capacity in building sustainable competitive advantages”.
- Full Text:
- Date Issued: 2013
- Authors: Tsoaeli, Tebalo
- Date: 2013
- Subjects: Nedbank Banks and banking -- South Africa Business planning Information technology
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:720 , http://hdl.handle.net/10962/d1001883
- Description: In today’s business world, a lot of organizations are investing heavily in Information Technology (IT) in order to develop a competitive edge. According to Loukis, Sapounas and Milionis (2009:85) “firms all over the world make significant investments in IT aiming to increase their efficiency and effectiveness”. According to Cline and Guynes (2001:10), “during the last 30 years, IT has become an increasingly integral part of business operations”. Most of the times, organizations fail to get real value from the investments made in IT. This is mainly due to the fact that organizations fail to realize the value brought about by aligning IT strategy with Business strategy. Hu and Huang (2004:60) state that “each year organizations invest in IT to improve their competitive advantage and ultimately their business performance; however, more often than not, the anticipated benefits of IT investments fail to materialize due to misalignment of or lack of alignment, between the business and IT strategies”. Henderson and Venkatraman (1999:475) emphasize that “alignment is a desired state for organizations investing in IT that is not always achieved, as it often entails a radical change in the way managers consider IT”. It is through the alignment of IT strategy and Business strategy that organizations are able to realize the value brought about by investing in IT. Papp (2001:20)illustrates that “misalignment can cause problems with not only the development and integration of business and IT strategies, but can actually prevent IT from being fully leveraged to its maximum potential within an organization”. An organization that realizes the value of aligning IT strategy and Business strategy is able to develop a competitive advantage over its competitors. According to Daneshvar and Ramesh (2010:1) “each organization is aware of the special effects, benefits and implication of IT in business performance and also its capacity in building sustainable competitive advantages”.
- Full Text:
- Date Issued: 2013
The role of agriculture in the Ncora area
- Authors: Mkwela, Gcobani
- Date: 2013
- Subjects: Agriculture -- Economic aspects -- South Africa -- Ncora , Agricultural development projects -- South Africa -- Ncora , Economic development
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9240 , http://hdl.handle.net/10948/d1021107
- Description: Despite 19 years of democracy and public action by civil society, policy makers continue to neglect the role of agriculture in improving the quality of life in rural areas such as Ncora in the Eastern Cape. The communities in the Ncora area still experience poverty despite the fact people receive state grants. Agriculture is declining in this area without basic infrastructure. The study argues that communities in the Ncora area need assistance from government in order to increase agricultural activities. These activities are an important route through which these communities can reduce poverty. The primary objective of this study was to obtain a better understanding of the role of agriculture in reducing poverty in the Ncora rural areas. The conditions necessary to sustain agriculture in the rural areas were identified. This was mainly done to help alleviate the plight of rural areas in the Ncora area and to improve the quality of life of the rural population. The study was based on three research objectives. The first objective was to investigate the constraints to agricultural production in Ncora. The second objective was to ascertain what has been done by the Eastern Cape government in increasing agricultural activities. The third objective was to investigate the contribution of agriculture in reducing poverty in Ncora. The main finding in terms of the first research objective is that constraints to agricultural production in Ncora are structural constraints. These include inadequate infrastructure such as poor roads, lack of transport and equipment, lack of farming skills, poor quality seed, no access to markets, inadequate and unaffordable services. In terms of the second research objective, the main finding is that the government has encouraged investment in infrastructure using labour-intensive methods will eliminate service backlogs in underserviced areas such as Ncora. Secondly, it has encouraged the revival of irrigation schemes such as the Ncora irrigation scheme and is investing in human capital through the empowerment of people in order to improve the quality of life of the Ncora community. Empowerment involves skills and training, education and access to basic services, expertise regarding credit, land and the growing of vegetables. The development of human capital is an important determinant of the pace of economic development. Human, social, natural, financial and physical capital are essential elements of reducing poverty. In fact, the Ncora community has lobbied Intsika Yethu Municipality for community development Community development through education and community participation in development programmes. Efforts have to be made to increase the skills that will enable them to complete development projects. These include technical skills in areas such as vegetable and crop production during the year. A key component of the success of development projects is to involve communities in the planning and decision-making processes. Community development is linked to empowerment, in other words, empowered people are able to contribute to the development of their community because they have knowledge of the economic, social and political goals of development. Therefore, empowerment enables people to participate in and have an influence on the decisions that affect their lives. The main finding in terms of the third research objective is that people in the Ncora community are using their own labour to improve food production to reduce poverty. The Ncora community has been shown when and how to make, grow and plant seeds, and look after the vegetables of their choice. The community of Ncora has learnt about cropping practices that are appropriate to their situation. The intention is to sell vegetables and crops to local communities and markets in order to generate income. The community has to do it for themselves or else they will wait forever.
- Full Text:
- Date Issued: 2013
- Authors: Mkwela, Gcobani
- Date: 2013
- Subjects: Agriculture -- Economic aspects -- South Africa -- Ncora , Agricultural development projects -- South Africa -- Ncora , Economic development
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9240 , http://hdl.handle.net/10948/d1021107
- Description: Despite 19 years of democracy and public action by civil society, policy makers continue to neglect the role of agriculture in improving the quality of life in rural areas such as Ncora in the Eastern Cape. The communities in the Ncora area still experience poverty despite the fact people receive state grants. Agriculture is declining in this area without basic infrastructure. The study argues that communities in the Ncora area need assistance from government in order to increase agricultural activities. These activities are an important route through which these communities can reduce poverty. The primary objective of this study was to obtain a better understanding of the role of agriculture in reducing poverty in the Ncora rural areas. The conditions necessary to sustain agriculture in the rural areas were identified. This was mainly done to help alleviate the plight of rural areas in the Ncora area and to improve the quality of life of the rural population. The study was based on three research objectives. The first objective was to investigate the constraints to agricultural production in Ncora. The second objective was to ascertain what has been done by the Eastern Cape government in increasing agricultural activities. The third objective was to investigate the contribution of agriculture in reducing poverty in Ncora. The main finding in terms of the first research objective is that constraints to agricultural production in Ncora are structural constraints. These include inadequate infrastructure such as poor roads, lack of transport and equipment, lack of farming skills, poor quality seed, no access to markets, inadequate and unaffordable services. In terms of the second research objective, the main finding is that the government has encouraged investment in infrastructure using labour-intensive methods will eliminate service backlogs in underserviced areas such as Ncora. Secondly, it has encouraged the revival of irrigation schemes such as the Ncora irrigation scheme and is investing in human capital through the empowerment of people in order to improve the quality of life of the Ncora community. Empowerment involves skills and training, education and access to basic services, expertise regarding credit, land and the growing of vegetables. The development of human capital is an important determinant of the pace of economic development. Human, social, natural, financial and physical capital are essential elements of reducing poverty. In fact, the Ncora community has lobbied Intsika Yethu Municipality for community development Community development through education and community participation in development programmes. Efforts have to be made to increase the skills that will enable them to complete development projects. These include technical skills in areas such as vegetable and crop production during the year. A key component of the success of development projects is to involve communities in the planning and decision-making processes. Community development is linked to empowerment, in other words, empowered people are able to contribute to the development of their community because they have knowledge of the economic, social and political goals of development. Therefore, empowerment enables people to participate in and have an influence on the decisions that affect their lives. The main finding in terms of the third research objective is that people in the Ncora community are using their own labour to improve food production to reduce poverty. The Ncora community has been shown when and how to make, grow and plant seeds, and look after the vegetables of their choice. The community of Ncora has learnt about cropping practices that are appropriate to their situation. The intention is to sell vegetables and crops to local communities and markets in order to generate income. The community has to do it for themselves or else they will wait forever.
- Full Text:
- Date Issued: 2013
Post-war reconstruction and development: a collective case study
- Authors: Heleta, Savo
- Date: 2013
- Subjects: Civil war , Peace , Peace-building , Nation-building
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9058 , http://hdl.handle.net/10948/d1008049 , Civil war , Peace , Peace-building , Nation-building
- Description: Since the end of the Cold War, there has been a surge in post-war stabilisation, reconstruction and development operations around the world. Externally driven efforts have been shaped by the liberal peace framework, which assumes that a rapid transmission or imposition of neo-liberal norms and values, combined with Western-style governance institutions, would create conditions for lasting peace and prosperity. Only in a few instances countries have attempted internally driven post-war reconstruction and development; in most cases, these efforts were either ignored or suppressed by international analysts, experts, academics and organisations. Despite all the expertise and funding spent since the early 1990s, externally driven operations have not led to lasting peace and stability, establishment of functioning institutions, eradication of poverty, livelihood improvements and economic reconstruction and development in war-torn countries. All too often, programmes, policies and „solutions‟ were designed and imposed by external actors either because they worked elsewhere or because they were influenced by geopolitical, economic and/or security interests of powerful countries. Furthermore, external actors have tended to assume that generic approaches based on the liberal peace framework can work in all places, while ignoring local actors, contexts and knowledge. Focusing on Bosnia and Herzegovina, South Sudan and Somaliland, this exploratory qualitative study critically explores and assesses both externally and internally driven post-war reconstruction and development practices and operations in order to understand the strengths and shortcomings of both approaches and offer recommendations for future improvements. This is important since socio-economic recovery and economic development are crucial for lasting stability and peace in post-war countries.
- Full Text:
- Date Issued: 2013
- Authors: Heleta, Savo
- Date: 2013
- Subjects: Civil war , Peace , Peace-building , Nation-building
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9058 , http://hdl.handle.net/10948/d1008049 , Civil war , Peace , Peace-building , Nation-building
- Description: Since the end of the Cold War, there has been a surge in post-war stabilisation, reconstruction and development operations around the world. Externally driven efforts have been shaped by the liberal peace framework, which assumes that a rapid transmission or imposition of neo-liberal norms and values, combined with Western-style governance institutions, would create conditions for lasting peace and prosperity. Only in a few instances countries have attempted internally driven post-war reconstruction and development; in most cases, these efforts were either ignored or suppressed by international analysts, experts, academics and organisations. Despite all the expertise and funding spent since the early 1990s, externally driven operations have not led to lasting peace and stability, establishment of functioning institutions, eradication of poverty, livelihood improvements and economic reconstruction and development in war-torn countries. All too often, programmes, policies and „solutions‟ were designed and imposed by external actors either because they worked elsewhere or because they were influenced by geopolitical, economic and/or security interests of powerful countries. Furthermore, external actors have tended to assume that generic approaches based on the liberal peace framework can work in all places, while ignoring local actors, contexts and knowledge. Focusing on Bosnia and Herzegovina, South Sudan and Somaliland, this exploratory qualitative study critically explores and assesses both externally and internally driven post-war reconstruction and development practices and operations in order to understand the strengths and shortcomings of both approaches and offer recommendations for future improvements. This is important since socio-economic recovery and economic development are crucial for lasting stability and peace in post-war countries.
- Full Text:
- Date Issued: 2013
Section 40 of the Consumer Protection Act in comparative perspective: aantekeninge
- Authors: Glover, Graham B
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70527 , vital:29672 , https://hdl.handle.net/10520/EJC144971
- Description: The purpose of this comment is to consider some of the problems with how we are to understand the role and purpose of section 40 of South Africa's Consumer Protection Act 68 of 2008 when viewed from a doctrinal perspective. Section 40 has the heading "Unconscionable conduct", and contains three subsections.
- Full Text: false
- Date Issued: 2013
- Authors: Glover, Graham B
- Date: 2013
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/70527 , vital:29672 , https://hdl.handle.net/10520/EJC144971
- Description: The purpose of this comment is to consider some of the problems with how we are to understand the role and purpose of section 40 of South Africa's Consumer Protection Act 68 of 2008 when viewed from a doctrinal perspective. Section 40 has the heading "Unconscionable conduct", and contains three subsections.
- Full Text: false
- Date Issued: 2013
Attracting and retaining talent: identifying employee value proposition (EVP) drivers of attraction and retention in the South African labour market
- Authors: Knox, Heather Joy
- Date: 2013
- Subjects: Employee retention -- South Africa , Personnel management -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9410 , http://hdl.handle.net/10948/d1020065
- Description: Rapid changes in the business environment as a result of globalisation, mergers and acquisitions, skills shortages and demographic changes in the workplace have led to a greater realisation of the importance of talent management and its role in ensuring a sustainable and successful organisation. Attracting and retaining talent has become one of the most important activities for organisations in order to ensure their competitive advantage. Companies must now differentiate themselves from competitors by offering current and potential employees an employment offering that they value. The employee value proposition (EVP) communicates to the internal and external workforce why they should work for and remain with a particular organisation. Identifying the attributes that employees' value is important in attracting and retaining the best talent. The aim of the study was therefore to identify the EVP drivers that a) attract and b) retain employees as well as those attributes that drive both attraction and retention. The influence of demographic variables, such as age and gender, on attracting and retaining employees was also explored. A structured questionnaire, based on the Corporate Leadership Council‟s EVP model, was developed and respondents were asked to indicate the importance they attach to each EVP attribute. A total of 204 respondents from 13 medium-sized to large-sized organisations in South Africa, participated in the study. The results showed that the quality of senior leadership, quality of managers and the organisation's reputation for managing people were the most important EVP drivers of both attraction and retention. The size of the organisation's workforce was the least important attribute for both attraction and retention. In addition, the results revealed there were no significant differences between EVP attributes that attract and retain males and those that attract and retain females. Furthermore, age plays a significant role in attracting and retaining talent. These results have significant implications for companies as they should design their EVP‟s based on what employees' value and deem to be the most important to them. Organisations need to start focusing on the generational differences that are present in today's business and adapt their EVP‟s accordingly.
- Full Text:
- Date Issued: 2013
- Authors: Knox, Heather Joy
- Date: 2013
- Subjects: Employee retention -- South Africa , Personnel management -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9410 , http://hdl.handle.net/10948/d1020065
- Description: Rapid changes in the business environment as a result of globalisation, mergers and acquisitions, skills shortages and demographic changes in the workplace have led to a greater realisation of the importance of talent management and its role in ensuring a sustainable and successful organisation. Attracting and retaining talent has become one of the most important activities for organisations in order to ensure their competitive advantage. Companies must now differentiate themselves from competitors by offering current and potential employees an employment offering that they value. The employee value proposition (EVP) communicates to the internal and external workforce why they should work for and remain with a particular organisation. Identifying the attributes that employees' value is important in attracting and retaining the best talent. The aim of the study was therefore to identify the EVP drivers that a) attract and b) retain employees as well as those attributes that drive both attraction and retention. The influence of demographic variables, such as age and gender, on attracting and retaining employees was also explored. A structured questionnaire, based on the Corporate Leadership Council‟s EVP model, was developed and respondents were asked to indicate the importance they attach to each EVP attribute. A total of 204 respondents from 13 medium-sized to large-sized organisations in South Africa, participated in the study. The results showed that the quality of senior leadership, quality of managers and the organisation's reputation for managing people were the most important EVP drivers of both attraction and retention. The size of the organisation's workforce was the least important attribute for both attraction and retention. In addition, the results revealed there were no significant differences between EVP attributes that attract and retain males and those that attract and retain females. Furthermore, age plays a significant role in attracting and retaining talent. These results have significant implications for companies as they should design their EVP‟s based on what employees' value and deem to be the most important to them. Organisations need to start focusing on the generational differences that are present in today's business and adapt their EVP‟s accordingly.
- Full Text:
- Date Issued: 2013
An investigation of community music in the Northern Areas of Port Elizabeth :a case study of five community bands
- Tobias, Michael Charles Peter
- Authors: Tobias, Michael Charles Peter
- Date: 2013
- Subjects: Community music -- South Africa -- Port Elizabeth , Bands (Music) -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:8528 , http://hdl.handle.net/10948/d1020949
- Description: The Northern Areas of Port Elizabeth are mostly comprised of the so called “Coloured” community and is vibrant in tradition and musical activities. Community music in the form of marching bands, brigade bands, wind bands and brass bands form a central part of the music activities in this area. The non-availability of music education in schools combined with the multitude of social challenges creates a cultural and moral vacuum. Children are not exposed to the finer arts and music in particular and without these bands and groups probably never will. This study will explore five community bands/groups and the role they play in the lives of people and especially the children and the youth. The impact and influence music has on the social upliftment of under-privileged children in this area has never been studied. The study shows the big impact these bands/groups have on the children and the communities they serve and highlights the dedication and good work of those band managers working with these groups. The study concludes with a proposal that an art/music centre be established in the Northern Areas of Port Elizabeth.
- Full Text:
- Date Issued: 2013
- Authors: Tobias, Michael Charles Peter
- Date: 2013
- Subjects: Community music -- South Africa -- Port Elizabeth , Bands (Music) -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:8528 , http://hdl.handle.net/10948/d1020949
- Description: The Northern Areas of Port Elizabeth are mostly comprised of the so called “Coloured” community and is vibrant in tradition and musical activities. Community music in the form of marching bands, brigade bands, wind bands and brass bands form a central part of the music activities in this area. The non-availability of music education in schools combined with the multitude of social challenges creates a cultural and moral vacuum. Children are not exposed to the finer arts and music in particular and without these bands and groups probably never will. This study will explore five community bands/groups and the role they play in the lives of people and especially the children and the youth. The impact and influence music has on the social upliftment of under-privileged children in this area has never been studied. The study shows the big impact these bands/groups have on the children and the communities they serve and highlights the dedication and good work of those band managers working with these groups. The study concludes with a proposal that an art/music centre be established in the Northern Areas of Port Elizabeth.
- Full Text:
- Date Issued: 2013
Zinc (II) 2, 9, 16, 23-tetrakis [4-(N-methylpyridyloxy)]-phthalocyanine anchored on an electrospun polysulfone polymer fiber: Application for photosensitized conversion of methyl orange
- Zugle, Ruphino, Nyokong, Tebello
- Authors: Zugle, Ruphino , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/232741 , vital:50020 , xlink:href="https://doi.org/10.1016/j.molcata.2012.10.001"
- Description: In this work, a comparative study of photodegradation of methyl orange, an azo dye, in homogeneous aqueous solution of a quarternized cationic zinc phthalocyanine and a heterogeneous catalytic system based on the same phthalocyanine anchored on polysulfone polymer fiber is presented. In both cases, conversion involved the azo bond of the dye with no detectable opening up of the aromatic benzene rings. The reaction kinetics in both cases were consistent with first order with the conversion occurring in the homogeneous system being faster than when the functionalized polymer fiber was used. The reaction products consisted of a coupling product as well as a series of oligopolymeric products.
- Full Text:
- Date Issued: 2013
- Authors: Zugle, Ruphino , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/232741 , vital:50020 , xlink:href="https://doi.org/10.1016/j.molcata.2012.10.001"
- Description: In this work, a comparative study of photodegradation of methyl orange, an azo dye, in homogeneous aqueous solution of a quarternized cationic zinc phthalocyanine and a heterogeneous catalytic system based on the same phthalocyanine anchored on polysulfone polymer fiber is presented. In both cases, conversion involved the azo bond of the dye with no detectable opening up of the aromatic benzene rings. The reaction kinetics in both cases were consistent with first order with the conversion occurring in the homogeneous system being faster than when the functionalized polymer fiber was used. The reaction products consisted of a coupling product as well as a series of oligopolymeric products.
- Full Text:
- Date Issued: 2013
From panic disorder to complex traumatic stress disorder : retrospective reflections on the case of Tariq
- Authors: Edwards, David J A
- Date: 2013
- Language: English
- Type: Article
- Identifier: vital:6234 , http://hdl.handle.net/10962/d1007784
- Description: This is a phenomenological-hermeneutic case study of Tariq who initially presented with panic disorder. It documents how, as therapy proceeded, the underlying meaning of his initial panic deepened as its roots in traumatic memories of childhood emerged. There were four spaced phases of treatment over four years. The first focused on anxiety management; the second was conceptualized within schema-focused therapy, and evoked and worked with childhood memories using inner child guided imagery; in the third and fourth phases insights gained led to an authentic re-engagement with family members in relationships that had been problematic. The panic attacks resolved and there were two dreams representing a reconfiguring of his relationship with his deceased father. The first two phases were the focus of an unpublished case study presented at a conference in 1995. This article incorporates material from that study and looks back at the case both in light of developments in phases two and three and also in light of theoretical developments in our understanding of complex trauma since the initial presentation.
- Full Text:
- Date Issued: 2013
- Authors: Edwards, David J A
- Date: 2013
- Language: English
- Type: Article
- Identifier: vital:6234 , http://hdl.handle.net/10962/d1007784
- Description: This is a phenomenological-hermeneutic case study of Tariq who initially presented with panic disorder. It documents how, as therapy proceeded, the underlying meaning of his initial panic deepened as its roots in traumatic memories of childhood emerged. There were four spaced phases of treatment over four years. The first focused on anxiety management; the second was conceptualized within schema-focused therapy, and evoked and worked with childhood memories using inner child guided imagery; in the third and fourth phases insights gained led to an authentic re-engagement with family members in relationships that had been problematic. The panic attacks resolved and there were two dreams representing a reconfiguring of his relationship with his deceased father. The first two phases were the focus of an unpublished case study presented at a conference in 1995. This article incorporates material from that study and looks back at the case both in light of developments in phases two and three and also in light of theoretical developments in our understanding of complex trauma since the initial presentation.
- Full Text:
- Date Issued: 2013
Medicinal properties of some plants used for the treatment of skin disorders in the O. R. Tambo and Amathole Municipalities of the Eastern Cape Province, South Africa
- Authors: Mahachi, Josia
- Date: 2013
- Subjects: Medicinal plants -- Skin -- Diseases -- Treatment , South Africa -- Eastern Cape Province
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:18487 , http://hdl.handle.net/11260/101
- Description: The use of medicinal plants for treatment of skin infections and improvement of skin tone was assessed. The study covered Amathole and OR Tambo municipalities of the Eastern Cape Province of South Africa. The study sought to identify and document some medicinal plants which are used by the indigenous people on the skin, evaluate some biological properties which attribute to their use for therapeutic use. This report provides ethnobotanical data on some plant which were identified. Six medicinal plants (Kniphofia drepanophylla, Gnidia capitata, Hypoxis hemerocallidea, Syzgium cordatum, Macaranga capensis and Protorhus longifolia) which were implicated for treatment of skin diseases were screened for their antibacterial and antioxidant properties. Guided questionnaires were used to interview and gather ethnobotanical information from the traditional healers. Members of the communities which were indicated to be knowledgeable on use of medicinal plants in the areas were visited and interviewed. The results revealed that a total of 45 plant species distributed in 41 Genera belonging to 28 Families are used for treatment of skin infections and improvement of skin texture. The plant medicines were reported to be used as remedies against common skin problem such as wounds, pimples, acnes and itches. Some were reported to have anti-inflammatory effect on the skin while other were reported to oil dry skin and prevent skin dryness and dry eczematous conditions. Others like Cassipourea flanaganii, and Spirostachys africana were commonly used to enlighten skin and protect skin from ultra-violet radiation. The most common mode of preparation of these medicinal plants was pastes or decoctions. Sometimes crushed plant materials were put in bathing water or boiled and steamed on affected parts. It was reported that mixing pastes with oil, animal fat and milk improve medicinal properties. Water, methanol and acetone extracts of K. drepanophylla, G. capitata, H. hemerocallidea, S. cordatum, M. capensis and P. longifolia were screened against five strains of Gram negative bacteria. The results revealed that water extracts from five plant species inhibited two or more strains of bacteria with the most common minimum inhibitory concentrations (MICs) ranging between 5,0 to 10,0 mg/ml with the exception of aqueous extracts of K. drepanophylla which failed to inhibit all strains of bacteria. The screening of methanol extract of these plants for antioxidant and free radical activity revealed a significant activity with 1, 1-diphenyl-2-picryl-hydrazyl (DPPH) free radical (DPPH). The extracts of P. longifolia, G. capitata, M. capensis, S. cordutum and H. hemerocallidea showed significantly higher free radical scavenging activity with IC50 of ranging from about 11.0 to 41.2 μg/ ml while the IC50 value for K. drepanophylla could not be determined at 100 μg/ ml. Generally the study showed that medicinal plants still play a very important role in the health care delivery system, especially in the O R Tambo and Amathole municipalities of the Eastern Cape. Botanical medicine remains pivotal in the treatment of skin ailments and improvement of the skin tone.
- Full Text:
- Date Issued: 2013
- Authors: Mahachi, Josia
- Date: 2013
- Subjects: Medicinal plants -- Skin -- Diseases -- Treatment , South Africa -- Eastern Cape Province
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:18487 , http://hdl.handle.net/11260/101
- Description: The use of medicinal plants for treatment of skin infections and improvement of skin tone was assessed. The study covered Amathole and OR Tambo municipalities of the Eastern Cape Province of South Africa. The study sought to identify and document some medicinal plants which are used by the indigenous people on the skin, evaluate some biological properties which attribute to their use for therapeutic use. This report provides ethnobotanical data on some plant which were identified. Six medicinal plants (Kniphofia drepanophylla, Gnidia capitata, Hypoxis hemerocallidea, Syzgium cordatum, Macaranga capensis and Protorhus longifolia) which were implicated for treatment of skin diseases were screened for their antibacterial and antioxidant properties. Guided questionnaires were used to interview and gather ethnobotanical information from the traditional healers. Members of the communities which were indicated to be knowledgeable on use of medicinal plants in the areas were visited and interviewed. The results revealed that a total of 45 plant species distributed in 41 Genera belonging to 28 Families are used for treatment of skin infections and improvement of skin texture. The plant medicines were reported to be used as remedies against common skin problem such as wounds, pimples, acnes and itches. Some were reported to have anti-inflammatory effect on the skin while other were reported to oil dry skin and prevent skin dryness and dry eczematous conditions. Others like Cassipourea flanaganii, and Spirostachys africana were commonly used to enlighten skin and protect skin from ultra-violet radiation. The most common mode of preparation of these medicinal plants was pastes or decoctions. Sometimes crushed plant materials were put in bathing water or boiled and steamed on affected parts. It was reported that mixing pastes with oil, animal fat and milk improve medicinal properties. Water, methanol and acetone extracts of K. drepanophylla, G. capitata, H. hemerocallidea, S. cordatum, M. capensis and P. longifolia were screened against five strains of Gram negative bacteria. The results revealed that water extracts from five plant species inhibited two or more strains of bacteria with the most common minimum inhibitory concentrations (MICs) ranging between 5,0 to 10,0 mg/ml with the exception of aqueous extracts of K. drepanophylla which failed to inhibit all strains of bacteria. The screening of methanol extract of these plants for antioxidant and free radical activity revealed a significant activity with 1, 1-diphenyl-2-picryl-hydrazyl (DPPH) free radical (DPPH). The extracts of P. longifolia, G. capitata, M. capensis, S. cordutum and H. hemerocallidea showed significantly higher free radical scavenging activity with IC50 of ranging from about 11.0 to 41.2 μg/ ml while the IC50 value for K. drepanophylla could not be determined at 100 μg/ ml. Generally the study showed that medicinal plants still play a very important role in the health care delivery system, especially in the O R Tambo and Amathole municipalities of the Eastern Cape. Botanical medicine remains pivotal in the treatment of skin ailments and improvement of the skin tone.
- Full Text:
- Date Issued: 2013
The effect of in vitro digestion on selected biological activities of Hypoxis sobolifera corms
- Authors: Van Rooyen, Anzel
- Date: 2013
- Subjects: Potatoes -- Therapeutic use , Medicinal plants
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10344 , http://hdl.handle.net/10948/d1020058
- Description: In South Africa part of the cultural and religious beliefs of the African people is the use of traditional remedies to treat diseases. These remedies are obtained from medicinal plants (Steenkamp, 2003). One of the most frequently traded plants in the Eastern Cape is Hypoxis, commonly known as Afrika patat, or African potato. South African traditional healers instruct patients to brew the fresh Hypoxis corm as a tea and then ingest it (Steenkamp, 2006a). This prompted an investigation into the digestive stability of a traditionally prepared Hypoxis extract. The H. sobolifera extracts were digested using a simulated gastric/small intestinal digestion and their biological activity determined. The hot water H. sobolifera extract before digestion only showed cytotoxic activity against cancer cell lines at very high concentrations which are not likely to be achieved under normal ingestion circumstances. In Chang liver cells on the other hand, chronic exposure to the hot water H. sobolifera extract increased glucose uptake in amounts similar to that of metformin. On the negative side, the glucose utilization stimulation was lost due to the simulated digestion process. The significant inhibition of AGEs by hot water H. sobolifera extract (IC50 of 6.3 Ig/ml) is a very encouraging result as treatment in the management of diabetes. This activity was only slightly reduced by the in vitro digestion process. Also observed was enzyme inhibition activity by traditionally prepared H. sobolifera, with ∝-amylase being inhibited (IC50 of approximately 250 Ig/ml) and therefore preventing or limiting starch breakdown. From the DPPH results it was clear that H. sobolifera, even when digested, is a potent anti-oxidant (IC50 of 134.4 Ig/ml when undigested compared to 162.9 when digested with β-glucosidase added to stomach digestive step). HPLC and TLC experiments revealed that rooperol which has previously been thought to be the compound responsible for the anti-oxidant activity in Hypoxis extracts, was absent from the traditional extract of H. sobolifera and therefore cannot be the sole compound exhibiting anti-oxidant activity; other compounds such as phenolics may be contributing. The phenolic and flavonoid content results revealed very highconcentrations of these compounds in the traditionally prepared H. sobolifera extract. These compounds may therefore play major roles in all of the biological activities observed from treatment with Hypoxis spp. The ROS results yielded interesting and promising results. Using standard or traditionally prepared H. sobolifera extracts, activation of differentiated U937 cells with PMA was greatly enhanced by cotreatment with the extracts, while extracts on their own did not cause significant activation. Future studies should investigate this property of the extracts as a promising immune boosterThe HPLC results showed that hypoxoside was undetectable in the hot water traditional extract and the TLC anti-oxidant experiment proved that rooperol is not present in the hot water traditional extract after treatment with β-glucosidase. This indicates that neither one of the Hypoxis compounds previously believed to be responsible for the biological activities observed are present in the extract when prepared the traditional way. Therefore, the biological activities observed in this study can be attributed to other phytochemical compounds.
- Full Text:
- Date Issued: 2013
- Authors: Van Rooyen, Anzel
- Date: 2013
- Subjects: Potatoes -- Therapeutic use , Medicinal plants
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10344 , http://hdl.handle.net/10948/d1020058
- Description: In South Africa part of the cultural and religious beliefs of the African people is the use of traditional remedies to treat diseases. These remedies are obtained from medicinal plants (Steenkamp, 2003). One of the most frequently traded plants in the Eastern Cape is Hypoxis, commonly known as Afrika patat, or African potato. South African traditional healers instruct patients to brew the fresh Hypoxis corm as a tea and then ingest it (Steenkamp, 2006a). This prompted an investigation into the digestive stability of a traditionally prepared Hypoxis extract. The H. sobolifera extracts were digested using a simulated gastric/small intestinal digestion and their biological activity determined. The hot water H. sobolifera extract before digestion only showed cytotoxic activity against cancer cell lines at very high concentrations which are not likely to be achieved under normal ingestion circumstances. In Chang liver cells on the other hand, chronic exposure to the hot water H. sobolifera extract increased glucose uptake in amounts similar to that of metformin. On the negative side, the glucose utilization stimulation was lost due to the simulated digestion process. The significant inhibition of AGEs by hot water H. sobolifera extract (IC50 of 6.3 Ig/ml) is a very encouraging result as treatment in the management of diabetes. This activity was only slightly reduced by the in vitro digestion process. Also observed was enzyme inhibition activity by traditionally prepared H. sobolifera, with ∝-amylase being inhibited (IC50 of approximately 250 Ig/ml) and therefore preventing or limiting starch breakdown. From the DPPH results it was clear that H. sobolifera, even when digested, is a potent anti-oxidant (IC50 of 134.4 Ig/ml when undigested compared to 162.9 when digested with β-glucosidase added to stomach digestive step). HPLC and TLC experiments revealed that rooperol which has previously been thought to be the compound responsible for the anti-oxidant activity in Hypoxis extracts, was absent from the traditional extract of H. sobolifera and therefore cannot be the sole compound exhibiting anti-oxidant activity; other compounds such as phenolics may be contributing. The phenolic and flavonoid content results revealed very highconcentrations of these compounds in the traditionally prepared H. sobolifera extract. These compounds may therefore play major roles in all of the biological activities observed from treatment with Hypoxis spp. The ROS results yielded interesting and promising results. Using standard or traditionally prepared H. sobolifera extracts, activation of differentiated U937 cells with PMA was greatly enhanced by cotreatment with the extracts, while extracts on their own did not cause significant activation. Future studies should investigate this property of the extracts as a promising immune boosterThe HPLC results showed that hypoxoside was undetectable in the hot water traditional extract and the TLC anti-oxidant experiment proved that rooperol is not present in the hot water traditional extract after treatment with β-glucosidase. This indicates that neither one of the Hypoxis compounds previously believed to be responsible for the biological activities observed are present in the extract when prepared the traditional way. Therefore, the biological activities observed in this study can be attributed to other phytochemical compounds.
- Full Text:
- Date Issued: 2013
The use of Blackboard as a tool for the teaching and assessment of large classes in mathematics education: a case study of second year level Bachelor of Education students in one university in South Africa
- Authors: Riley, Alanna
- Date: 2013
- Subjects: Blackboards , Blackboard drawing , Mathematics -- Study and teaching , College students , Educational change , Information technology , Teaching -- Aids and devices , College teaching , Assessment , Blended learning
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16182 , http://hdl.handle.net/10353/d1006237 , Blackboards , Blackboard drawing , Mathematics -- Study and teaching , College students , Educational change , Information technology , Teaching -- Aids and devices , College teaching , Assessment , Blended learning
- Description: This study locates the Blackboard Learning Management System as a Technology Enhanced Learning tool within the bounds of the discipline of eLearning and aimed to interrogate the use of Blackboard for the purposes of teaching, learning and assessment in large classes. It is evident from the literature reviewed that changes in both Higher Education in the South Africa with regards to policy and legislation in addition to international shifts towards increased access and participation in a fast paced, ever-evolving knowledge-based economy, providing the context for this work. The theoretical framework for this study is not unidimensional due to the fact that the educational field of eLearning as an area of specialisation draws on a multitude of theories in terms of their utility value for instructional design of courses utilising Information and Communications Technology as a mode of delivery. This study was conducted within the bounds of an interpretivist paradigm as the researcher sought to focus on the use of Blackboard and the experiences of the lecturers and students involved in the implementation thereof. The research design for this study took the form of a case study and a multiple case method was employed. The researcher collected data through personal interviews conducted with participating lecturers, while student data was collected by means of a qualitative survey which was conducted through the Blackboard Learning Management System. The data was analyzed by means of a thematic analysis, consistent with the interpretive paradigm chosen for this study. The findings of this study revealed that Blackboard was utilised effectively in order to facilitate communication, access to course resources and promoted more efficient assessment processes. The implementation was however not without challenges many of which were systemic and focused on the lack of resources available to the students. The implications of using Blackboard for teaching and assessment of large classes include the use of the Learning Management System as part of a multimodal method of course delivery in an effort to reach the multitude of registered students both conceptually as well as electronically. The recommendations arising from this study include consideration on the part of the faculty for a unified approach in the use of Blackboard for communication as well as deployment of resources. Additionally, this study may form the foundation of further studies in this field, with a focus on the active engagement and training of lecturers in order to integrate traditional teaching methods with blended learning opportunities.
- Full Text:
- Date Issued: 2013
- Authors: Riley, Alanna
- Date: 2013
- Subjects: Blackboards , Blackboard drawing , Mathematics -- Study and teaching , College students , Educational change , Information technology , Teaching -- Aids and devices , College teaching , Assessment , Blended learning
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16182 , http://hdl.handle.net/10353/d1006237 , Blackboards , Blackboard drawing , Mathematics -- Study and teaching , College students , Educational change , Information technology , Teaching -- Aids and devices , College teaching , Assessment , Blended learning
- Description: This study locates the Blackboard Learning Management System as a Technology Enhanced Learning tool within the bounds of the discipline of eLearning and aimed to interrogate the use of Blackboard for the purposes of teaching, learning and assessment in large classes. It is evident from the literature reviewed that changes in both Higher Education in the South Africa with regards to policy and legislation in addition to international shifts towards increased access and participation in a fast paced, ever-evolving knowledge-based economy, providing the context for this work. The theoretical framework for this study is not unidimensional due to the fact that the educational field of eLearning as an area of specialisation draws on a multitude of theories in terms of their utility value for instructional design of courses utilising Information and Communications Technology as a mode of delivery. This study was conducted within the bounds of an interpretivist paradigm as the researcher sought to focus on the use of Blackboard and the experiences of the lecturers and students involved in the implementation thereof. The research design for this study took the form of a case study and a multiple case method was employed. The researcher collected data through personal interviews conducted with participating lecturers, while student data was collected by means of a qualitative survey which was conducted through the Blackboard Learning Management System. The data was analyzed by means of a thematic analysis, consistent with the interpretive paradigm chosen for this study. The findings of this study revealed that Blackboard was utilised effectively in order to facilitate communication, access to course resources and promoted more efficient assessment processes. The implementation was however not without challenges many of which were systemic and focused on the lack of resources available to the students. The implications of using Blackboard for teaching and assessment of large classes include the use of the Learning Management System as part of a multimodal method of course delivery in an effort to reach the multitude of registered students both conceptually as well as electronically. The recommendations arising from this study include consideration on the part of the faculty for a unified approach in the use of Blackboard for communication as well as deployment of resources. Additionally, this study may form the foundation of further studies in this field, with a focus on the active engagement and training of lecturers in order to integrate traditional teaching methods with blended learning opportunities.
- Full Text:
- Date Issued: 2013
The sustainability of rural sanitation facilities in municipalities
- Authors: Maxwele, Zukani
- Date: 2013
- Subjects: Sanitation, Rural -- South Africa -- Eastern Cape , Sanitary engineering -- South Africa -- Eastern Cape , Sewage disposal, Rural -- South Africa -- Eastern Cape , Rural development projects -- South Africa -- Citizen participation , Municipal services -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:9713 , http://hdl.handle.net/10948/d1020580
- Description: Progress has been made in eradicating the backlog in sanitation. This is reflected by the 2011 Census results that reflect a 21 percent increase in the provision of sanitation between the 2001 Census and the 2011 Census. In the rural areas of O.R. Tambo District Municipality, the eradication of sanitation backlogs is done through the provision of VIPs for sanitation. Even with this progress, there are still challenges resulting from the previously constructed sanitation facilities. Some of the challenges relate to the poor quality of these facilities. Community members – via the IDP road shows have voiced their unhappiness with regard to some of the sustainability factors of these structures. Community members feel they were not involved in decisions related to the sanitation projects. It has also been observed that the municipality and its agents do not conduct environmental management studies; and some pits of these structures were not lined, and the health and hygiene training, together with post-construction assessment was not done. In this study, an assessment of the provision of sanitation facilities, in order to identify some of the key factors that are critical to the sustainability of rural sanitation facilities, was done. The research findings should be helpful in assisting local government to improve the provision of sanitation facilities, with the aim of ensuring sustainability, improving community satisfaction, and improving the quality of life for the people living in these villages. For the purpose of the study, a quantitative research approach was used. A research questionnaire was used to collect the data; and it was distributed through email to a sample of respondents that understood sanitation issues. The data were collected from municipal officials, consultants working on sanitation projects, as well as other stakeholders with influence and an interest in sanitation. The results were analysed to establish the findings and to propose recommendations, in order to improve the sustainability of rural sanitation facilities. From the research findings, the recommendations highlighted the need for an improved participatory approach in implementing sanitation projects. To ensure sustainability, the following issues are key: monitoring and supervision; community participation and adherence to design guidelines; a review of the sanitation provision policy; as well as the promotion of health and hygiene.
- Full Text:
- Date Issued: 2013
- Authors: Maxwele, Zukani
- Date: 2013
- Subjects: Sanitation, Rural -- South Africa -- Eastern Cape , Sanitary engineering -- South Africa -- Eastern Cape , Sewage disposal, Rural -- South Africa -- Eastern Cape , Rural development projects -- South Africa -- Citizen participation , Municipal services -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:9713 , http://hdl.handle.net/10948/d1020580
- Description: Progress has been made in eradicating the backlog in sanitation. This is reflected by the 2011 Census results that reflect a 21 percent increase in the provision of sanitation between the 2001 Census and the 2011 Census. In the rural areas of O.R. Tambo District Municipality, the eradication of sanitation backlogs is done through the provision of VIPs for sanitation. Even with this progress, there are still challenges resulting from the previously constructed sanitation facilities. Some of the challenges relate to the poor quality of these facilities. Community members – via the IDP road shows have voiced their unhappiness with regard to some of the sustainability factors of these structures. Community members feel they were not involved in decisions related to the sanitation projects. It has also been observed that the municipality and its agents do not conduct environmental management studies; and some pits of these structures were not lined, and the health and hygiene training, together with post-construction assessment was not done. In this study, an assessment of the provision of sanitation facilities, in order to identify some of the key factors that are critical to the sustainability of rural sanitation facilities, was done. The research findings should be helpful in assisting local government to improve the provision of sanitation facilities, with the aim of ensuring sustainability, improving community satisfaction, and improving the quality of life for the people living in these villages. For the purpose of the study, a quantitative research approach was used. A research questionnaire was used to collect the data; and it was distributed through email to a sample of respondents that understood sanitation issues. The data were collected from municipal officials, consultants working on sanitation projects, as well as other stakeholders with influence and an interest in sanitation. The results were analysed to establish the findings and to propose recommendations, in order to improve the sustainability of rural sanitation facilities. From the research findings, the recommendations highlighted the need for an improved participatory approach in implementing sanitation projects. To ensure sustainability, the following issues are key: monitoring and supervision; community participation and adherence to design guidelines; a review of the sanitation provision policy; as well as the promotion of health and hygiene.
- Full Text:
- Date Issued: 2013
Sustainable livelihoods in a new housing development : the case of Kuyga, Nelson Mandela Bay Municipality
- Authors: Gugwini, Khululwa
- Date: 2013
- Subjects: Low-income housing -- South Africa -- Nelson Mandela Bay Municipality , Housing development -- South Africa -- Nelson Mandela Bay Municipality , Economic development projects -- Evaluation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9188 , http://hdl.handle.net/10948/d1020300
- Description: The study was undertaken to satisfy the following objectives of the research study: To determine the livelihoods of residents of a low income housing development; To assess the role played by the local economic development initiatives in the Kuyga community; and To make recommendations regarding policies and actions that could reduce the unemployment rate and create sustainable and viable livelihoods for the Kuyga community in Nelson Mandela Bay Municipality. To note, what triggered the researcher to undertake the study, are the high levels of unemployment, poverty and poor monitoring of the local economic initiatives within the area. In this study, the researcher explores the livelihoods of the Kuyga community and the opportunities for creating more sustainable and viable livelihoods. Attention is drawn to Government policies, Local economic Development as well as Integrated Development Plans of the Nelson Mandela Bay Municipality, simultaneously realising that the South African government cannot work in isolation to deliver all the community needs effectively as expected.
- Full Text:
- Date Issued: 2013
- Authors: Gugwini, Khululwa
- Date: 2013
- Subjects: Low-income housing -- South Africa -- Nelson Mandela Bay Municipality , Housing development -- South Africa -- Nelson Mandela Bay Municipality , Economic development projects -- Evaluation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9188 , http://hdl.handle.net/10948/d1020300
- Description: The study was undertaken to satisfy the following objectives of the research study: To determine the livelihoods of residents of a low income housing development; To assess the role played by the local economic development initiatives in the Kuyga community; and To make recommendations regarding policies and actions that could reduce the unemployment rate and create sustainable and viable livelihoods for the Kuyga community in Nelson Mandela Bay Municipality. To note, what triggered the researcher to undertake the study, are the high levels of unemployment, poverty and poor monitoring of the local economic initiatives within the area. In this study, the researcher explores the livelihoods of the Kuyga community and the opportunities for creating more sustainable and viable livelihoods. Attention is drawn to Government policies, Local economic Development as well as Integrated Development Plans of the Nelson Mandela Bay Municipality, simultaneously realising that the South African government cannot work in isolation to deliver all the community needs effectively as expected.
- Full Text:
- Date Issued: 2013
A case study of industrial relations climate in Zimbabwean mining company
- Authors: Chabaya, Blessing
- Subjects: Industrial relations -- Zimbabwe , Collective bargaining -- Mining industry -- Zimbabwe
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9435 , http://hdl.handle.net/10948/d1020863
- Description: Research problem: Various factors which influence industrial relations climate can be classified as input variables (Dastmalchian, Adamason and Blyton, 1991). The industrial relations climate (IRC) in turn has the potential to positive or negatively influence and be influenced by the industrial relations outcomes of the organisation such as labour turnover, industrial action and productivity. Management therefore need to be aware of the prevailing IRC as well as the factors influencing the prevailing industrial relations climate so as to take the necessary and relevant measures and steps to improve the labour-management relations. Research objectives: The research objectives for addressing the research problem were mainly to ascertain the prevailing labour relations climate within the selected mine. The second objective was to identify the factors that shape labour relations climate and thirdly to establish the impact of the prevailing industrial relations climate within the mine Research questions: Research questions for the study were developed and were; What is the overall labour relations climate? What is the contribution of each of the five dimensions to the overall labour relations climate? What is the relationship between the subgroups, distinguished by union affiliation and occupational level? What is the relationship between the sub-groups, distinguished by gender, age, race years in organization, full-time or part-time, union affiliation, years in union, union status, occupational level, educational level and the five dimensions of the labour relations climate? What are the factors that shape the industrial relations climate with particular reference to the following factors such as the organisational context and background, the structure of the organisation, the Human Resources context, the Industrial Relations context and Industrial relations outcomes? Research design: The study was descriptive research and both qualitative and quantitative methods were used in order to address the objectives of the study. A self-administered survey questionnaire was used to collect quantitative data and in-depth semi-structured face-to-face interviews were also used to collect data relating to the IRC and the factors influencing the industrial relations climate. Human Resources records and reports were also used to provide secondary data for industrial relations outcomes. Major findings: The results from the study revealed that overall a negative IRC prevailed within the mine. This also applied to the five dimensions of climate that were measured. It was found that there was agreement between the unionised and the non-unionised employees’ perceptions of the industrial relations climate and similarly, when the miners’ perception of climate was compared with the more managerial group. The only really significant difference in perception was that management felt that the climate was fairer than did the miners. The results also revealed that the organisational environment and structure and the human resources and industrial relations contexts were consistent with the literature descriptions of an organisational environment that would inhibit a positive industrial relations climate. The results for the organisational outcomes, in particular absenteeism and turnover were also found to be consistent with those of organisations were the prevailing industrial relations climate was negative. The results also revealed that organisational age, size, ownership, structure, formalisation, decision-making, labour market, union-management consultation, communication were influenced and shaped the prevailing IRC. It also revealed that the prevailing IRC had impact on the levels of absenteeism and labour turnover.
- Full Text:
- Authors: Chabaya, Blessing
- Subjects: Industrial relations -- Zimbabwe , Collective bargaining -- Mining industry -- Zimbabwe
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9435 , http://hdl.handle.net/10948/d1020863
- Description: Research problem: Various factors which influence industrial relations climate can be classified as input variables (Dastmalchian, Adamason and Blyton, 1991). The industrial relations climate (IRC) in turn has the potential to positive or negatively influence and be influenced by the industrial relations outcomes of the organisation such as labour turnover, industrial action and productivity. Management therefore need to be aware of the prevailing IRC as well as the factors influencing the prevailing industrial relations climate so as to take the necessary and relevant measures and steps to improve the labour-management relations. Research objectives: The research objectives for addressing the research problem were mainly to ascertain the prevailing labour relations climate within the selected mine. The second objective was to identify the factors that shape labour relations climate and thirdly to establish the impact of the prevailing industrial relations climate within the mine Research questions: Research questions for the study were developed and were; What is the overall labour relations climate? What is the contribution of each of the five dimensions to the overall labour relations climate? What is the relationship between the subgroups, distinguished by union affiliation and occupational level? What is the relationship between the sub-groups, distinguished by gender, age, race years in organization, full-time or part-time, union affiliation, years in union, union status, occupational level, educational level and the five dimensions of the labour relations climate? What are the factors that shape the industrial relations climate with particular reference to the following factors such as the organisational context and background, the structure of the organisation, the Human Resources context, the Industrial Relations context and Industrial relations outcomes? Research design: The study was descriptive research and both qualitative and quantitative methods were used in order to address the objectives of the study. A self-administered survey questionnaire was used to collect quantitative data and in-depth semi-structured face-to-face interviews were also used to collect data relating to the IRC and the factors influencing the industrial relations climate. Human Resources records and reports were also used to provide secondary data for industrial relations outcomes. Major findings: The results from the study revealed that overall a negative IRC prevailed within the mine. This also applied to the five dimensions of climate that were measured. It was found that there was agreement between the unionised and the non-unionised employees’ perceptions of the industrial relations climate and similarly, when the miners’ perception of climate was compared with the more managerial group. The only really significant difference in perception was that management felt that the climate was fairer than did the miners. The results also revealed that the organisational environment and structure and the human resources and industrial relations contexts were consistent with the literature descriptions of an organisational environment that would inhibit a positive industrial relations climate. The results for the organisational outcomes, in particular absenteeism and turnover were also found to be consistent with those of organisations were the prevailing industrial relations climate was negative. The results also revealed that organisational age, size, ownership, structure, formalisation, decision-making, labour market, union-management consultation, communication were influenced and shaped the prevailing IRC. It also revealed that the prevailing IRC had impact on the levels of absenteeism and labour turnover.
- Full Text:
Understanding livelihood strategies of urban women traders : a case of Magaba, Harare in Zimbabwe
- Authors: Chirau, Takunda John
- Date: 2013
- Subjects: Street vendors -- Zimbabwe -- Harare Women -- Zimbabwe -- Harare -- Social conditions Women -- Zimbabwe -- Harare -- Economic conditions Urban poor -- Zimbabwe -- Harare
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3335 , http://hdl.handle.net/10962/d1003742
- Description: This thesis seeks to understand and analyze the livelihood strategies of urban women traders at Magaba in Harare (Zimbabwe) in the context of the contemporary economic and political crisis. The crisis emerged in the 1990s with the introduction of a structural adjustment programme and deepened further with the fast track land reform programme initiated by the Zimbabwean government in the year 2000. The crisis has involved a down-sizing of the Zimbabwean economy and a massive rise in the rate of unemployment in the formal economy. Consequently urban life became increasingly unbearable for poor blacks and informal economic activities blossomed and started to make a significant contribution to household income and livelihoods. The role of women in the informal economy was particularly pronounced. Theoretically, the thesis is underpinned by the sustainable livelihoods framework. In examining the vulnerability context of the Magaba women traders and the institutional interventions which complicate the lives and livelihoods of these traders, I identify and unpack their diverse livelihood activities and strategies and the resources (or assets) they deploy in constructing urban livelihoods. Though their livelihood portfolios complement any earnings from formal employment by household members and though they contribute to their household’s sustenance, there are a number of daily challenges which they face in their trading activities and which they seek to counteract through a range of often ingenious coping mechanisms. The thesis is important for a number of reasons. It fills an important empirical gap in the study of Magaba market specifically, it brings to the fore the gendered character of the informal trading activities in urban Zimbabwe, and it deploys the livelihoods framework in a manner which is sensitive to both structure and agency.
- Full Text:
- Date Issued: 2013
- Authors: Chirau, Takunda John
- Date: 2013
- Subjects: Street vendors -- Zimbabwe -- Harare Women -- Zimbabwe -- Harare -- Social conditions Women -- Zimbabwe -- Harare -- Economic conditions Urban poor -- Zimbabwe -- Harare
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3335 , http://hdl.handle.net/10962/d1003742
- Description: This thesis seeks to understand and analyze the livelihood strategies of urban women traders at Magaba in Harare (Zimbabwe) in the context of the contemporary economic and political crisis. The crisis emerged in the 1990s with the introduction of a structural adjustment programme and deepened further with the fast track land reform programme initiated by the Zimbabwean government in the year 2000. The crisis has involved a down-sizing of the Zimbabwean economy and a massive rise in the rate of unemployment in the formal economy. Consequently urban life became increasingly unbearable for poor blacks and informal economic activities blossomed and started to make a significant contribution to household income and livelihoods. The role of women in the informal economy was particularly pronounced. Theoretically, the thesis is underpinned by the sustainable livelihoods framework. In examining the vulnerability context of the Magaba women traders and the institutional interventions which complicate the lives and livelihoods of these traders, I identify and unpack their diverse livelihood activities and strategies and the resources (or assets) they deploy in constructing urban livelihoods. Though their livelihood portfolios complement any earnings from formal employment by household members and though they contribute to their household’s sustenance, there are a number of daily challenges which they face in their trading activities and which they seek to counteract through a range of often ingenious coping mechanisms. The thesis is important for a number of reasons. It fills an important empirical gap in the study of Magaba market specifically, it brings to the fore the gendered character of the informal trading activities in urban Zimbabwe, and it deploys the livelihoods framework in a manner which is sensitive to both structure and agency.
- Full Text:
- Date Issued: 2013
Surface patterning using scanning electrochemical microscopy to locally trigger a “click” chemistry reaction
- Quinton, Damien, Maringa, Audacity, Griveau, Sophie, Nyokong, Tebello, Bedioui, Fethi
- Authors: Quinton, Damien , Maringa, Audacity , Griveau, Sophie , Nyokong, Tebello , Bedioui, Fethi
- Language: English
- Type: Article
- Identifier: vital:7331 , http://hdl.handle.net/10962/d1020592
- Description: We report on the surface micropatterning of conductive surfaces via the electrochemical triggering of a click reaction, the copper(I) catalyzed azide–alkyne cycloaddition reaction (CuAAC) by SECM via a two-step approach: (i) functionalization on the entire surface with azido-aryl groups by using the diazonium approach followed by (ii) the covalent linkage of alkyne-bearing ferrocene by CuAAC within a local area by SECM. More precisely, the click reaction was triggered by Cu(I) catalyst generation for 30 min at the SECM tip positioned ≈ 10 μm above the azido-aryl modified surface. The dimension of the spot obtained under these conditions was ≈ 75 μm. The electrochemical imaging by SECM of the ultra thin area locally clicked with ferrocene moieties was made thanks to the electrocatalytic properties of the ferrocene modified surface towards ferrocyanide electrooxidation. This local clicking procedure opens the gate to further controlled functionalization of restricted small substrates. , Original publication is available at http://dx.doi.org/10.1016/j.elecom.2013.03.021
- Full Text: false
- Authors: Quinton, Damien , Maringa, Audacity , Griveau, Sophie , Nyokong, Tebello , Bedioui, Fethi
- Language: English
- Type: Article
- Identifier: vital:7331 , http://hdl.handle.net/10962/d1020592
- Description: We report on the surface micropatterning of conductive surfaces via the electrochemical triggering of a click reaction, the copper(I) catalyzed azide–alkyne cycloaddition reaction (CuAAC) by SECM via a two-step approach: (i) functionalization on the entire surface with azido-aryl groups by using the diazonium approach followed by (ii) the covalent linkage of alkyne-bearing ferrocene by CuAAC within a local area by SECM. More precisely, the click reaction was triggered by Cu(I) catalyst generation for 30 min at the SECM tip positioned ≈ 10 μm above the azido-aryl modified surface. The dimension of the spot obtained under these conditions was ≈ 75 μm. The electrochemical imaging by SECM of the ultra thin area locally clicked with ferrocene moieties was made thanks to the electrocatalytic properties of the ferrocene modified surface towards ferrocyanide electrooxidation. This local clicking procedure opens the gate to further controlled functionalization of restricted small substrates. , Original publication is available at http://dx.doi.org/10.1016/j.elecom.2013.03.021
- Full Text: false
An investigation into control mechanisms of driving performance : resource depletion and effort-regulation
- Authors: Louw, Tyron Linton
- Date: 2013
- Subjects: Automobile driving simulators , Automobile driving -- Psychological aspects , Automobile driving -- Physiological aspects , Traffic accidents , Traffic safety , Fatigue
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5101 , http://hdl.handle.net/10962/d1001842 , Automobile driving simulators , Automobile driving -- Psychological aspects , Automobile driving -- Physiological aspects , Traffic accidents , Traffic safety , Fatigue
- Description: Driver fatigue is a complex phenomenon that has a range of causal factors including sleeprelated and task-related factors. These manifest as different safety and performance outcomes. Extensive research has been applied to linking these factors to performance impairment. However, little research focuses on the mechanisms by which this link exists. This research project therefore focuses on the processes underlying how driving performance is controlled and maintained during the development on non-sleep-related driver fatigue. The main aim was to establish whether progressive impairment of driving control over a prolonged drive could be attributed to a depletion of attentional resources, as proposed by Resource Theory, or to a withdrawal of effort, as proposed by Effort-Regulation Theory. As a multicomponent skill, driving requires perception, cognition and motor output. The secondary aim of this research was therefore to assess whether a prolonged drive impairs stage-specific information processing. Participants (n=24) in three experimental groups performed a 90-minute simulated drive wherein they were expected to keep the bonnet of a car on a lane (tracking task). The three groups differed in terms of lane width: small, medium and large, corresponding to low, medium, and high task-demand, respectively. To assess the impacts of this task on stagespecific information processing, participants performed a set of resource specific tests before and after the prolonged drive. Each task had two difficulty variations to ensure that performance decrement was due not only to the task-characteristic, but specifically to resource depletion. The tests probing information processing were: a modified Fitts' tapping task for motor programming, a digit recall task for perception, and an object recognition reading task for cognition. Performance was measured as lateral deviation of the car. Physiological measures included heart rate frequency (HR) and various time- and frequencydomain heart rate variability (HRV) parameters, eye blink frequency and duration. The Borg CR-10 scale was used to evaluate subjective effort and fatigue during the task. Driving control declined over time and was supplemented by HR, HRV, blink frequency and duration, indicating an increase in parasympathetic activity (or a reduction in arousal). An increase in blink frequency was considered as a sign of withdrawal of attentional resources over time. Driving control declined to a greater extent in the large road width group and reflected a lower parasympathetic activity, whereas the inverse was observed for the small road width group. Resource tests reveal a non-specific impairment of information processing following the prolonged drive. However, this was accompanied by an increase in parasympathetic activity. Overall, results indicate that Effort-Regulation Theory better accounts for the impairment of driving control in prolonged driving than does Resource Theory. This suggests that the impact of fatigue is guided more by task goals and intrinsic motivation than by the manner in which the fatigue state developed. Moreover, performance impairment by effort-regulation is dependant more on time on task than on task-demand
- Full Text:
- Date Issued: 2013
- Authors: Louw, Tyron Linton
- Date: 2013
- Subjects: Automobile driving simulators , Automobile driving -- Psychological aspects , Automobile driving -- Physiological aspects , Traffic accidents , Traffic safety , Fatigue
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5101 , http://hdl.handle.net/10962/d1001842 , Automobile driving simulators , Automobile driving -- Psychological aspects , Automobile driving -- Physiological aspects , Traffic accidents , Traffic safety , Fatigue
- Description: Driver fatigue is a complex phenomenon that has a range of causal factors including sleeprelated and task-related factors. These manifest as different safety and performance outcomes. Extensive research has been applied to linking these factors to performance impairment. However, little research focuses on the mechanisms by which this link exists. This research project therefore focuses on the processes underlying how driving performance is controlled and maintained during the development on non-sleep-related driver fatigue. The main aim was to establish whether progressive impairment of driving control over a prolonged drive could be attributed to a depletion of attentional resources, as proposed by Resource Theory, or to a withdrawal of effort, as proposed by Effort-Regulation Theory. As a multicomponent skill, driving requires perception, cognition and motor output. The secondary aim of this research was therefore to assess whether a prolonged drive impairs stage-specific information processing. Participants (n=24) in three experimental groups performed a 90-minute simulated drive wherein they were expected to keep the bonnet of a car on a lane (tracking task). The three groups differed in terms of lane width: small, medium and large, corresponding to low, medium, and high task-demand, respectively. To assess the impacts of this task on stagespecific information processing, participants performed a set of resource specific tests before and after the prolonged drive. Each task had two difficulty variations to ensure that performance decrement was due not only to the task-characteristic, but specifically to resource depletion. The tests probing information processing were: a modified Fitts' tapping task for motor programming, a digit recall task for perception, and an object recognition reading task for cognition. Performance was measured as lateral deviation of the car. Physiological measures included heart rate frequency (HR) and various time- and frequencydomain heart rate variability (HRV) parameters, eye blink frequency and duration. The Borg CR-10 scale was used to evaluate subjective effort and fatigue during the task. Driving control declined over time and was supplemented by HR, HRV, blink frequency and duration, indicating an increase in parasympathetic activity (or a reduction in arousal). An increase in blink frequency was considered as a sign of withdrawal of attentional resources over time. Driving control declined to a greater extent in the large road width group and reflected a lower parasympathetic activity, whereas the inverse was observed for the small road width group. Resource tests reveal a non-specific impairment of information processing following the prolonged drive. However, this was accompanied by an increase in parasympathetic activity. Overall, results indicate that Effort-Regulation Theory better accounts for the impairment of driving control in prolonged driving than does Resource Theory. This suggests that the impact of fatigue is guided more by task goals and intrinsic motivation than by the manner in which the fatigue state developed. Moreover, performance impairment by effort-regulation is dependant more on time on task than on task-demand
- Full Text:
- Date Issued: 2013