Adaptive realities : effects of merging physical and virtual entities
- Authors: Fletcher, Lauren Jean
- Date: 2015
- Subjects: Virtual reality in art , Reality in art , Art, Modern -- 21st century , Art, Modern -- 21st century -- Themes, motives , Perception
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2509 , http://hdl.handle.net/10962/d1018557
- Description: In the worlds of virtual reality, whole objects and bodies are created in an immaterial manner from lines, ratios and light pixels. When objects are created in this form they can easily be manipulated, edited, multiplied and deleted. In addition, technological advances in virtual reality development result in an increased merging of physical and virtual elements, creating spaces of mixed reality. This leads to interesting consequences where the physical environment and body, in a similar vein to the virtual, also becomes increasingly easier to manipulate, distort and change. Mixed realities thus enhance possibilities of a world of constantly changing landscapes and adjustable, interchangeable bodies. The notions of virtual and real coincide within this thesis, reflecting on a new version of reality that is overlapped and ever-present in its mixing of virtual and physical. These concepts are explored within my exhibition Immaterial - a creation of simulated nature encompassing a mix of natural and artificial, tangible and intangible. Within the exhibition space, I have created a scene of mixed reality, by merging elements of both a virtual and physical forest. This generates a magical space of new experiences that comes to life through the manipulated, edited, morphed and re-awakened bodies of trees.
- Full Text:
- Date Issued: 2015
- Authors: Fletcher, Lauren Jean
- Date: 2015
- Subjects: Virtual reality in art , Reality in art , Art, Modern -- 21st century , Art, Modern -- 21st century -- Themes, motives , Perception
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2509 , http://hdl.handle.net/10962/d1018557
- Description: In the worlds of virtual reality, whole objects and bodies are created in an immaterial manner from lines, ratios and light pixels. When objects are created in this form they can easily be manipulated, edited, multiplied and deleted. In addition, technological advances in virtual reality development result in an increased merging of physical and virtual elements, creating spaces of mixed reality. This leads to interesting consequences where the physical environment and body, in a similar vein to the virtual, also becomes increasingly easier to manipulate, distort and change. Mixed realities thus enhance possibilities of a world of constantly changing landscapes and adjustable, interchangeable bodies. The notions of virtual and real coincide within this thesis, reflecting on a new version of reality that is overlapped and ever-present in its mixing of virtual and physical. These concepts are explored within my exhibition Immaterial - a creation of simulated nature encompassing a mix of natural and artificial, tangible and intangible. Within the exhibition space, I have created a scene of mixed reality, by merging elements of both a virtual and physical forest. This generates a magical space of new experiences that comes to life through the manipulated, edited, morphed and re-awakened bodies of trees.
- Full Text:
- Date Issued: 2015
Amber : a aero-interaction honeypot with distributed intelligence
- Authors: Schoeman, Adam
- Date: 2015
- Subjects: Security systems -- Security measures , Computer viruses , Intrusion detection systems (Computer security) , Computer security
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4716 , http://hdl.handle.net/10962/d1017938
- Description: For the greater part, security controls are based on the principle of Decision through Detection (DtD). The exception to this is a honeypot, which analyses interactions between a third party and itself, while occupying a piece of unused information space. As honeypots are not located on productive information resources, any interaction with it can be assumed to be non-productive. This allows the honeypot to make decisions based simply on the presence of data, rather than on the behaviour of the data. But due to limited resources in human capital, honeypots’ uptake in the South African market has been underwhelming. Amber attempts to change this by offering a zero-interaction security system, which will use the honeypot approach of decision through Presence (DtP) to generate a blacklist of third parties, which can be passed on to a network enforcer. Empirical testing has proved the usefulness of this alternative and low cost approach in defending networks. The functionality of the system was also extended by installing nodes in different geographical locations, and streaming their detections into the central Amber hive.
- Full Text:
- Date Issued: 2015
- Authors: Schoeman, Adam
- Date: 2015
- Subjects: Security systems -- Security measures , Computer viruses , Intrusion detection systems (Computer security) , Computer security
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4716 , http://hdl.handle.net/10962/d1017938
- Description: For the greater part, security controls are based on the principle of Decision through Detection (DtD). The exception to this is a honeypot, which analyses interactions between a third party and itself, while occupying a piece of unused information space. As honeypots are not located on productive information resources, any interaction with it can be assumed to be non-productive. This allows the honeypot to make decisions based simply on the presence of data, rather than on the behaviour of the data. But due to limited resources in human capital, honeypots’ uptake in the South African market has been underwhelming. Amber attempts to change this by offering a zero-interaction security system, which will use the honeypot approach of decision through Presence (DtP) to generate a blacklist of third parties, which can be passed on to a network enforcer. Empirical testing has proved the usefulness of this alternative and low cost approach in defending networks. The functionality of the system was also extended by installing nodes in different geographical locations, and streaming their detections into the central Amber hive.
- Full Text:
- Date Issued: 2015
An analysis of malware evasion techniques against modern AV engines
- Authors: Haffejee, Jameel
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:20979 , http://hdl.handle.net/10962/5821
- Description: This research empirically tested the response of antivirus applications to binaries that use virus-like evasion techniques. In order to achieve this, a number of binaries are processed using a number of evasion methods and are then deployed against several antivirus engines. The research also documents the process of setting up an environment for testing antivirus engines, including building the evasion techniques used in the tests. The results of the empirical tests illustrate that an attacker can evade multiple antivirus engines without much effort using well-known evasion techniques. Furthermore, some antivirus engines may respond to the occurrence of an evasion technique instead of the presence of any malicious code. In practical terms, this shows that while antivirus applications are useful for protecting against known threats, their effectiveness against unknown or modified threats is limited.
- Full Text:
- Date Issued: 2015
- Authors: Haffejee, Jameel
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:20979 , http://hdl.handle.net/10962/5821
- Description: This research empirically tested the response of antivirus applications to binaries that use virus-like evasion techniques. In order to achieve this, a number of binaries are processed using a number of evasion methods and are then deployed against several antivirus engines. The research also documents the process of setting up an environment for testing antivirus engines, including building the evasion techniques used in the tests. The results of the empirical tests illustrate that an attacker can evade multiple antivirus engines without much effort using well-known evasion techniques. Furthermore, some antivirus engines may respond to the occurrence of an evasion technique instead of the presence of any malicious code. In practical terms, this shows that while antivirus applications are useful for protecting against known threats, their effectiveness against unknown or modified threats is limited.
- Full Text:
- Date Issued: 2015
An analysis of public equity offerings listed on the Johannesburg Stock Exchange (JSE)
- Authors: Van Heerden, Gillian
- Date: 2015
- Subjects: Stock exchanges -- South Africa -- Johannesburg
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1119 , http://hdl.handle.net/10962/d1017546
- Description: The underpricing of initial public offerings (IPOs) and their subsequent low long-run performance represents one of the anomalies observed in primary markets worldwide. However, the depth and breadth of it varies from country to country, and sector to sector. Literature has documented that the phenomenon surrounding the long-run post issue performance of IPOs is not unique and that quite similar patterns can be found regarding firms making seasoned equity offerings (SEOs). This study is an empirical analysis of public equity offerings listed on the Johannesburg Stock Exchange (JSE). Using data for 141 South African IPOs that were listed on the JSE Mainboard from 2001 to 2010, significant short-run underpricing is found. A sector wise analysis of three broad sectors indicated that the ‘other’ sector had the largest IPO underpricing after the first few days of trading. The year-wise analysis is also documented. In the long-run this study showed that IPOs in South Africa underperformed two out of three benchmarks in 36 full months post listing. In contrast, using data for 50 South African SEOs during 2003 to 2010, superior SEO performance is found over a 36-month period when assessed using a size and industry adjusted benchmark. Various cross-sectional and time-series patterns in the aftermarket performance of IPO and SEO firms are also documented
- Full Text:
- Date Issued: 2015
- Authors: Van Heerden, Gillian
- Date: 2015
- Subjects: Stock exchanges -- South Africa -- Johannesburg
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1119 , http://hdl.handle.net/10962/d1017546
- Description: The underpricing of initial public offerings (IPOs) and their subsequent low long-run performance represents one of the anomalies observed in primary markets worldwide. However, the depth and breadth of it varies from country to country, and sector to sector. Literature has documented that the phenomenon surrounding the long-run post issue performance of IPOs is not unique and that quite similar patterns can be found regarding firms making seasoned equity offerings (SEOs). This study is an empirical analysis of public equity offerings listed on the Johannesburg Stock Exchange (JSE). Using data for 141 South African IPOs that were listed on the JSE Mainboard from 2001 to 2010, significant short-run underpricing is found. A sector wise analysis of three broad sectors indicated that the ‘other’ sector had the largest IPO underpricing after the first few days of trading. The year-wise analysis is also documented. In the long-run this study showed that IPOs in South Africa underperformed two out of three benchmarks in 36 full months post listing. In contrast, using data for 50 South African SEOs during 2003 to 2010, superior SEO performance is found over a 36-month period when assessed using a size and industry adjusted benchmark. Various cross-sectional and time-series patterns in the aftermarket performance of IPO and SEO firms are also documented
- Full Text:
- Date Issued: 2015
An analysis of the development model for ex-farmworkers and adjacent communities in the Indalo association of private game reserves in the Eastern Cape
- Tessendorf, Samantha Millicent
- Authors: Tessendorf, Samantha Millicent
- Date: 2015
- Subjects: Game reserves -- South Africa -- Eastern Cape , Agricultural laborers -- South Africa -- Eastern Cape , Land reform -- South Africa -- Eastern Cape , Land use -- South Africa -- Eastern Cape , Land use -- Citizen participation , Rural development -- South Africa -- Eastern Cape , Rural development -- Citizen participation
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3399 , http://hdl.handle.net/10962/d1018547
- Description: Over the past fifteen years there has been an extensive conversion of land use from traditional farming practices to conservation and private game reserves. It has been suggested by Langholz and Kerley (2006:2) that privately owned preserved areas can engage in ecotourism initiatives by protecting biodiversity, succeeding financially and contributing to social upliftment. However, ecotourism has to operate within the context of historical land dispossession of the majority black population and current land reform initiatives to address this problem. In view of the economic, social and environmental importance of ecotourism based private game reserves (PGRs) in South Africa, particularly the Eastern Cape, the main goal of this research is to examine the Indalo association of private game reserves in the Eastern Cape Province’s development model for ex-farmworkers and adjacent communities. This was done through a literature survey and analysis of existing studies and by interviewing the managers of the Indalo PGRs and a few farmworkers to get their opinions of the tension between what they are doing and the imperatives of land reform. This involved an exploration of their community development work, particularly around issues of job creation, participation in decision-making, capacity building and sustainability. The thesis comes to the following conclusions. The first is that the establishment of PGRs have a significant positive impact on the local areas in which they are established. As a land-use, ecotourism based game reserves are an economically and ecologically desirable alternative to other land uses. Therefore the ecotourism based private game reserve industry with its extensive community development focus for farmworkers and local communities is a viable and sustainable alternative to conventional land reform. The second is that the Indalo PGRs development work has built capacity in the communities it has served. However, community participation, particularly in decision-making is limited and needs more attention if productive and sustainable development is to be achieved. Lastly, communities rely heavily on external support for their development and upliftment. However, the majority of the PGRs have/or are putting measures in place to ensure the continuation of community development projects to ensure the long-term sustainability of projects.
- Full Text:
- Date Issued: 2015
- Authors: Tessendorf, Samantha Millicent
- Date: 2015
- Subjects: Game reserves -- South Africa -- Eastern Cape , Agricultural laborers -- South Africa -- Eastern Cape , Land reform -- South Africa -- Eastern Cape , Land use -- South Africa -- Eastern Cape , Land use -- Citizen participation , Rural development -- South Africa -- Eastern Cape , Rural development -- Citizen participation
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3399 , http://hdl.handle.net/10962/d1018547
- Description: Over the past fifteen years there has been an extensive conversion of land use from traditional farming practices to conservation and private game reserves. It has been suggested by Langholz and Kerley (2006:2) that privately owned preserved areas can engage in ecotourism initiatives by protecting biodiversity, succeeding financially and contributing to social upliftment. However, ecotourism has to operate within the context of historical land dispossession of the majority black population and current land reform initiatives to address this problem. In view of the economic, social and environmental importance of ecotourism based private game reserves (PGRs) in South Africa, particularly the Eastern Cape, the main goal of this research is to examine the Indalo association of private game reserves in the Eastern Cape Province’s development model for ex-farmworkers and adjacent communities. This was done through a literature survey and analysis of existing studies and by interviewing the managers of the Indalo PGRs and a few farmworkers to get their opinions of the tension between what they are doing and the imperatives of land reform. This involved an exploration of their community development work, particularly around issues of job creation, participation in decision-making, capacity building and sustainability. The thesis comes to the following conclusions. The first is that the establishment of PGRs have a significant positive impact on the local areas in which they are established. As a land-use, ecotourism based game reserves are an economically and ecologically desirable alternative to other land uses. Therefore the ecotourism based private game reserve industry with its extensive community development focus for farmworkers and local communities is a viable and sustainable alternative to conventional land reform. The second is that the Indalo PGRs development work has built capacity in the communities it has served. However, community participation, particularly in decision-making is limited and needs more attention if productive and sustainable development is to be achieved. Lastly, communities rely heavily on external support for their development and upliftment. However, the majority of the PGRs have/or are putting measures in place to ensure the continuation of community development projects to ensure the long-term sustainability of projects.
- Full Text:
- Date Issued: 2015
An analysis of the income tax consequences resulting from implementing the Income Tax Bill (2012) in Zimbabwe
- Authors: Kanyenze, Rumbidzai
- Date: 2015
- Subjects: Income tax deductions -- Zimbabwe , Income tax -- Law and legislation -- Zimbabwe
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:914 , http://hdl.handle.net/10962/d1017536
- Description: The Income Tax Bill (2012) proposes certain changes to the existing Income Tax Act that will impact on the method used to determine the taxable income of a taxpayer in Zimbabwe. Therefore, it is important to understand the tax consequences the Income Tax Bill creates for the taxpayer. The research aimed to elaborate on and explain the tax consequences that will arise as a result of applying the Income Tax Bill in Zimbabwe. The research was based on a qualitative method which involved the analysis and the interpretation of extracts from legislation and articles written on the proposed changes. The current “gross income” of a taxpayer consists of amounts earned from a source within or deemed to be from within Zimbabwe The proposed changes to the Act will change the tax system to a residence-based system, where resident taxpayers are taxed on amounts earned from all sources. Therefore, the driving factor which determines the taxability of an amount will become the taxpayer’s residency. Clause 2 of the proposed Act provides that income earned by a taxpayer should be separated into employment income, business income, property income and other specified income. This will make it unnecessary to determine the nature of an amount because capital amounts will be subject to income tax. The current Act provides for the deduction of expenditure incurred for the purpose of trade or in the production of income. Section 31(1)(a) of the proposed Act will restrict permissible deductions to expenditure incurred in the production of income. Consequently, expenditure not incurred for the purpose of earning income will no longer be deductible when the Income Tax Bill is implemented. The proposed Income Tax Act will increase the taxable income of a taxpayer as it makes amounts that are not currently subject to tax taxable, whilst restricting the deductions claimable.
- Full Text:
- Date Issued: 2015
- Authors: Kanyenze, Rumbidzai
- Date: 2015
- Subjects: Income tax deductions -- Zimbabwe , Income tax -- Law and legislation -- Zimbabwe
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:914 , http://hdl.handle.net/10962/d1017536
- Description: The Income Tax Bill (2012) proposes certain changes to the existing Income Tax Act that will impact on the method used to determine the taxable income of a taxpayer in Zimbabwe. Therefore, it is important to understand the tax consequences the Income Tax Bill creates for the taxpayer. The research aimed to elaborate on and explain the tax consequences that will arise as a result of applying the Income Tax Bill in Zimbabwe. The research was based on a qualitative method which involved the analysis and the interpretation of extracts from legislation and articles written on the proposed changes. The current “gross income” of a taxpayer consists of amounts earned from a source within or deemed to be from within Zimbabwe The proposed changes to the Act will change the tax system to a residence-based system, where resident taxpayers are taxed on amounts earned from all sources. Therefore, the driving factor which determines the taxability of an amount will become the taxpayer’s residency. Clause 2 of the proposed Act provides that income earned by a taxpayer should be separated into employment income, business income, property income and other specified income. This will make it unnecessary to determine the nature of an amount because capital amounts will be subject to income tax. The current Act provides for the deduction of expenditure incurred for the purpose of trade or in the production of income. Section 31(1)(a) of the proposed Act will restrict permissible deductions to expenditure incurred in the production of income. Consequently, expenditure not incurred for the purpose of earning income will no longer be deductible when the Income Tax Bill is implemented. The proposed Income Tax Act will increase the taxable income of a taxpayer as it makes amounts that are not currently subject to tax taxable, whilst restricting the deductions claimable.
- Full Text:
- Date Issued: 2015
An analysis of the risk adjusted returns of active versus passive South African general equity unit trusts during varying economic periods: an individual investor's perspective
- Authors: Ferreira, James Stuart
- Date: 2015
- Subjects: Mutual funds , Global Financial Crisis, 2008-2009 , Risk assessment , Financial crises -- South Africa , Portfolio management , Financial planners
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1207 , http://hdl.handle.net/10962/d1019753
- Description: This thesis used the events of the 2007 financial crisis as a means of being able to add to the research already done on South African unit trusts. The objective was to study the risk-adjusted performance of South African general equity unit trusts against the market during the period between 2005 and 2014. This period took into account the bull market preceding the financial crisis, the market crash of 2007 and the subsequent market recovery that followed. Data was obtained online through the I-Net BFA data base and included 161 general equity unit trusts that contained a full data set. In addition to the general equity unit trusts, the Satrix40 was studied to compare a passive unit trust against those that are actively managed. The 10 year Government bond was also used as a risk-free rate to add to the comparisons of performance results. The Sharpe, Treynor and Jensen measures were applied to the data with the results adding more support to the opinions that markets are fairly efficient and active investment strategies are being challenged by consistently well performing passive investments. Throughout the duration of the study, taking into account the varying economic cycles, the Satrix40 passive investment showed the best average overall return on simple return calculations as well as during the risk-adjusted measurements. In support of active investment management, unit trusts showed their best relative performance figures during the period of the financial crisis. This suggested that active financial managers were able to make the active calls necessary to weather the storm of the financial crisis. While the study did have its limitations, the results it produced are intended to offer investors further knowledge in enabling them to make more educated investment decisions in the future.
- Full Text:
- Date Issued: 2015
- Authors: Ferreira, James Stuart
- Date: 2015
- Subjects: Mutual funds , Global Financial Crisis, 2008-2009 , Risk assessment , Financial crises -- South Africa , Portfolio management , Financial planners
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1207 , http://hdl.handle.net/10962/d1019753
- Description: This thesis used the events of the 2007 financial crisis as a means of being able to add to the research already done on South African unit trusts. The objective was to study the risk-adjusted performance of South African general equity unit trusts against the market during the period between 2005 and 2014. This period took into account the bull market preceding the financial crisis, the market crash of 2007 and the subsequent market recovery that followed. Data was obtained online through the I-Net BFA data base and included 161 general equity unit trusts that contained a full data set. In addition to the general equity unit trusts, the Satrix40 was studied to compare a passive unit trust against those that are actively managed. The 10 year Government bond was also used as a risk-free rate to add to the comparisons of performance results. The Sharpe, Treynor and Jensen measures were applied to the data with the results adding more support to the opinions that markets are fairly efficient and active investment strategies are being challenged by consistently well performing passive investments. Throughout the duration of the study, taking into account the varying economic cycles, the Satrix40 passive investment showed the best average overall return on simple return calculations as well as during the risk-adjusted measurements. In support of active investment management, unit trusts showed their best relative performance figures during the period of the financial crisis. This suggested that active financial managers were able to make the active calls necessary to weather the storm of the financial crisis. While the study did have its limitations, the results it produced are intended to offer investors further knowledge in enabling them to make more educated investment decisions in the future.
- Full Text:
- Date Issued: 2015
An analysis of the risk exposure of adopting IPV6 in enterprise networks
- Authors: Berko, Istvan Sandor
- Date: 2015
- Subjects: International Workshop on Deploying the Future Infrastructure , Computer networks , Computer networks -- Security measures , Computer network protocols
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4722 , http://hdl.handle.net/10962/d1018918
- Description: The IPv6 increased address pool presents changes in resource impact to the Enterprise that, if not adequately addressed, can change risks that are locally significant in IPv4 to risks that can impact the Enterprise in its entirety. The expected conclusion is that the IPv6 environment will impose significant changes in the Enterprise environment - which may negatively impact organisational security if the IPv6 nuances are not adequately addressed. This thesis reviews the risks related to the operation of enterprise networks with the introduction of IPv6. The global trends are discussed to provide insight and background to the IPv6 research space. Analysing the current state of readiness in enterprise networks, quantifies the value of developing this thesis. The base controls that should be deployed in enterprise networks to prevent the abuse of IPv6 through tunnelling and the protection of the enterprise access layer are discussed. A series of case studies are presented which identify and analyse the impact of certain changes in the IPv6 protocol on the enterprise networks. The case studies also identify mitigation techniques to reduce risk.
- Full Text:
- Date Issued: 2015
- Authors: Berko, Istvan Sandor
- Date: 2015
- Subjects: International Workshop on Deploying the Future Infrastructure , Computer networks , Computer networks -- Security measures , Computer network protocols
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4722 , http://hdl.handle.net/10962/d1018918
- Description: The IPv6 increased address pool presents changes in resource impact to the Enterprise that, if not adequately addressed, can change risks that are locally significant in IPv4 to risks that can impact the Enterprise in its entirety. The expected conclusion is that the IPv6 environment will impose significant changes in the Enterprise environment - which may negatively impact organisational security if the IPv6 nuances are not adequately addressed. This thesis reviews the risks related to the operation of enterprise networks with the introduction of IPv6. The global trends are discussed to provide insight and background to the IPv6 research space. Analysing the current state of readiness in enterprise networks, quantifies the value of developing this thesis. The base controls that should be deployed in enterprise networks to prevent the abuse of IPv6 through tunnelling and the protection of the enterprise access layer are discussed. A series of case studies are presented which identify and analyse the impact of certain changes in the IPv6 protocol on the enterprise networks. The case studies also identify mitigation techniques to reduce risk.
- Full Text:
- Date Issued: 2015
An analysis of the tax consequences of the double tax agreement between South Africa and the Democratic Republic of Congo
- Authors: Mkabile, Nwabisa
- Date: 2015
- Subjects: Double taxation -- South Africa , Double taxation -- Congo (Democratic Republic) , Income tax -- South Africa -- Foreign income , Income tax -- Congo (Democratic Republic) -- Foreign income
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:916 , http://hdl.handle.net/10962/d1017539
- Description: As a result of the different tax systems adopted by countries, foreign-sourced income earned by taxpayers may be subject to double taxation. This may therefore impede cross-border trade and investment. Double taxation relief is provided unilaterally, in terms of a country’s domestic laws or bilaterally in terms of Double Taxation Agreements. South African residents earning income from the Democratic Republic of Congo may be subject to tax in both countries. To eliminate such double taxation the South African Income Tax Act, No 58 of 1962, provides for unilateral relief from double taxation in the form of exemptions, rebates and deductions. The double tax agreement between South Africa and the Democratic Republic of the Congo came into effect recently and double taxation relief for South African residents is now also available in terms of tax treaty law. The objective of the research was to determine whether the combination of the unilateral measures and the double tax agreement provide relief in respect of all types of income earned by South African residents in the Democratic Republic of the Congo. It was concluded that the double tax agreement, together with the unilateral relief provided for in the Income Tax Act will grant relief for all types of income earned by South African residents in the Democratic Republic of the Congo.
- Full Text:
- Date Issued: 2015
- Authors: Mkabile, Nwabisa
- Date: 2015
- Subjects: Double taxation -- South Africa , Double taxation -- Congo (Democratic Republic) , Income tax -- South Africa -- Foreign income , Income tax -- Congo (Democratic Republic) -- Foreign income
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:916 , http://hdl.handle.net/10962/d1017539
- Description: As a result of the different tax systems adopted by countries, foreign-sourced income earned by taxpayers may be subject to double taxation. This may therefore impede cross-border trade and investment. Double taxation relief is provided unilaterally, in terms of a country’s domestic laws or bilaterally in terms of Double Taxation Agreements. South African residents earning income from the Democratic Republic of Congo may be subject to tax in both countries. To eliminate such double taxation the South African Income Tax Act, No 58 of 1962, provides for unilateral relief from double taxation in the form of exemptions, rebates and deductions. The double tax agreement between South Africa and the Democratic Republic of the Congo came into effect recently and double taxation relief for South African residents is now also available in terms of tax treaty law. The objective of the research was to determine whether the combination of the unilateral measures and the double tax agreement provide relief in respect of all types of income earned by South African residents in the Democratic Republic of the Congo. It was concluded that the double tax agreement, together with the unilateral relief provided for in the Income Tax Act will grant relief for all types of income earned by South African residents in the Democratic Republic of the Congo.
- Full Text:
- Date Issued: 2015
An assessment of e-tolling as a method of financing Gauteng roads
- Authors: Ponter, Lloyd Anthony
- Date: 2015
- Subjects: Toll roads -- Taxation -- South Africa -- Gauteng , Electronic Road Pricing System -- South Africa -- Gauteng , Toll roads -- South Africa -- Gauteng -- Cost effectiveness
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:912 , http://hdl.handle.net/10962/d1017185
- Description: E-tolling was recently implemented on roads in Gauteng, South Africa. This gave rise to a great deal of protest by road users and a court battle between the South African National Roads Agency (SANRAL) and the Opposition to Urban Tolling Alliance, a body representing road users. The e-tolling system was criticised at various levels and on numerous grounds, some financial and others appearing to be emotional. This thesis attempted to analyse the various grounds for objection against the system, the main goal of the research being to analyse e-tolling in Gauteng to ascertain whether or not the introduction of e-tolling was justified or whether an alternative method of taxation to pay for the upgrading of Gauteng roads would have been more cost-effective. Secondary data in the form of documents from multiple sources was used in the analysis, including an Economic Impact Assessment that was one of the key inputs into the decision to introduce e-tolling. It was found that there are multiple problems plaguing the e-toll system and e-tolling is not the most cost-effective taxation method of paying for Gauteng roads. Using a fuel levy or general tax revenue available to the National Treasury were both found to be more cost-effective methods as they would have achieved the same result (repairing and upgrading specific Gauteng roads), at a cost of R20,0913 billion less than e-tolling. It was suggested that the best taxation method/s to pay for the roads would have been using a fuel levy and general tax revenue as the primary funding methods, with vehicle licensing fees and long distance toll roads as secondary methods to aid the primary methods.
- Full Text:
- Date Issued: 2015
- Authors: Ponter, Lloyd Anthony
- Date: 2015
- Subjects: Toll roads -- Taxation -- South Africa -- Gauteng , Electronic Road Pricing System -- South Africa -- Gauteng , Toll roads -- South Africa -- Gauteng -- Cost effectiveness
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:912 , http://hdl.handle.net/10962/d1017185
- Description: E-tolling was recently implemented on roads in Gauteng, South Africa. This gave rise to a great deal of protest by road users and a court battle between the South African National Roads Agency (SANRAL) and the Opposition to Urban Tolling Alliance, a body representing road users. The e-tolling system was criticised at various levels and on numerous grounds, some financial and others appearing to be emotional. This thesis attempted to analyse the various grounds for objection against the system, the main goal of the research being to analyse e-tolling in Gauteng to ascertain whether or not the introduction of e-tolling was justified or whether an alternative method of taxation to pay for the upgrading of Gauteng roads would have been more cost-effective. Secondary data in the form of documents from multiple sources was used in the analysis, including an Economic Impact Assessment that was one of the key inputs into the decision to introduce e-tolling. It was found that there are multiple problems plaguing the e-toll system and e-tolling is not the most cost-effective taxation method of paying for Gauteng roads. Using a fuel levy or general tax revenue available to the National Treasury were both found to be more cost-effective methods as they would have achieved the same result (repairing and upgrading specific Gauteng roads), at a cost of R20,0913 billion less than e-tolling. It was suggested that the best taxation method/s to pay for the roads would have been using a fuel levy and general tax revenue as the primary funding methods, with vehicle licensing fees and long distance toll roads as secondary methods to aid the primary methods.
- Full Text:
- Date Issued: 2015
An empirical study on staff turnover and retention within Eskom : Eastern Cape Operating Unit
- Authors: Chibba, Rajesh Chagan
- Date: 2015
- Subjects: Eskom (Firm) , Labor turnover -- South Africa -- Eastern Cape , Employee retention -- South Africa -- Eastern Cape , Job satisfaction -- South Africa -- Eastern Cape , Career development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:847 , http://hdl.handle.net/10962/d1017514
- Description: This research paper is broken up into three sections, namely an evaluation report, a literature review and a description of the research methodology. The evaluation report section is an assessment of the factors that could contribute to staff leaving the organisation and why staff would choose to remain with the organisation. The Distribution Division of Eskom is divided into nine separate Operating Units (OU's), in line with the nine Provinces. According to an Eskom Human Resource Manager (Mjali, 2013), as at March 2012 there were 2231 employees in the Easter Cape Operating Unit, while the staff turnover for the same period was 4.53%. Of the 101 staff that had resigned for the period 01 April 2011 to 31 March 2012, there were 27 transfers, 26 resignations and 30 retirements. The balance of 18 staff that left was due to dismissals and deaths. While the statistics suggest a healthy level of staff turnover at present, given the current pressures that Eskom employees are under, it is important to investigate their future intentions and to see what Eskom can do to continue to retain their services. The literature relating to staff turnover and retention was examined to determine the meaning of the terms retention and turnover and to review the relevant turnover topics that were emerging from the exit interview data. The research conducted was quantitative in nature, and a questionnaire was distributed to all managerial staff within the Eastern Cape Operating Unit of Eskom. The questionnaire was sent electronically to the participants via email with the link to the questionnaire. Participants were requested to respond on questions relating to factors on turnover and retention, and the responses were used to assess employee's intention to either remain with the organisation or to leave. The feedback received was analysed with the use of data analysis in Microsoft Excel (2010). The results of the research showed that there were two distinct themes related to employees' intention to remain with the organisation, namely job satisfaction and career development. On the other end of the scale, themes which would cause staff to want to leave the organisation were the performance management system of the organisation, not being listened to (i.e. to the ideas and views of staff) and leadership (i.e. the way the organisation was being led). Recommendations are made to management. The study also recommends future research that can be done to get greater insight into factors relating to staff turnover and retention. A detailed review of the literature is included in Section two of the report. Only essential components of the literature are included in Section one of report. Section three of the report provided a detailed description of the research design and the research procedure that was followed.
- Full Text:
- Date Issued: 2015
- Authors: Chibba, Rajesh Chagan
- Date: 2015
- Subjects: Eskom (Firm) , Labor turnover -- South Africa -- Eastern Cape , Employee retention -- South Africa -- Eastern Cape , Job satisfaction -- South Africa -- Eastern Cape , Career development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:847 , http://hdl.handle.net/10962/d1017514
- Description: This research paper is broken up into three sections, namely an evaluation report, a literature review and a description of the research methodology. The evaluation report section is an assessment of the factors that could contribute to staff leaving the organisation and why staff would choose to remain with the organisation. The Distribution Division of Eskom is divided into nine separate Operating Units (OU's), in line with the nine Provinces. According to an Eskom Human Resource Manager (Mjali, 2013), as at March 2012 there were 2231 employees in the Easter Cape Operating Unit, while the staff turnover for the same period was 4.53%. Of the 101 staff that had resigned for the period 01 April 2011 to 31 March 2012, there were 27 transfers, 26 resignations and 30 retirements. The balance of 18 staff that left was due to dismissals and deaths. While the statistics suggest a healthy level of staff turnover at present, given the current pressures that Eskom employees are under, it is important to investigate their future intentions and to see what Eskom can do to continue to retain their services. The literature relating to staff turnover and retention was examined to determine the meaning of the terms retention and turnover and to review the relevant turnover topics that were emerging from the exit interview data. The research conducted was quantitative in nature, and a questionnaire was distributed to all managerial staff within the Eastern Cape Operating Unit of Eskom. The questionnaire was sent electronically to the participants via email with the link to the questionnaire. Participants were requested to respond on questions relating to factors on turnover and retention, and the responses were used to assess employee's intention to either remain with the organisation or to leave. The feedback received was analysed with the use of data analysis in Microsoft Excel (2010). The results of the research showed that there were two distinct themes related to employees' intention to remain with the organisation, namely job satisfaction and career development. On the other end of the scale, themes which would cause staff to want to leave the organisation were the performance management system of the organisation, not being listened to (i.e. to the ideas and views of staff) and leadership (i.e. the way the organisation was being led). Recommendations are made to management. The study also recommends future research that can be done to get greater insight into factors relating to staff turnover and retention. A detailed review of the literature is included in Section two of the report. Only essential components of the literature are included in Section one of report. Section three of the report provided a detailed description of the research design and the research procedure that was followed.
- Full Text:
- Date Issued: 2015
An ergonomics intervention study into the physiological, perceptual and productivity effects of three citrus harvesting bag designs in the Eastern Cape of South Africa : a combined laboratory and field approach
- Bassey-Duke, Elizabeth Misan
- Authors: Bassey-Duke, Elizabeth Misan
- Date: 2015
- Subjects: Citrus -- Harvesting -- South Africa -- Eastern Cape , Lifting and carrying -- South Africa -- Eastern Cape , Manual work -- South Africa -- Eastern Cape , Blue collar workers -- South Africa -- Eastern Cape , Work -- Physiological aspects , Human mechanics
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5176 , http://hdl.handle.net/10962/d1018908
- Description: Background: Agriculture plays a vital role in the economy of any industrially developing country, including South Africa. In the Eastern Cape of South Africa citrus farming is a significant contributor to the local economy (Johnson et al., 2005). The harvesting phase of citrus farming is performed manually and exposes workers to physical risks, which can lead to the development of musculoskeletal disorders. In particular, the standard harvesting bag comprises of a single shoulder strap and promotes asymmetrical load carriage which results in shoulder and lower back pain complaints. The current study compared the physiological (EMG), perceptual (RPE), usability (PUEU) and productivity effects of two new harvesting bag designs (a hip belt and a backpack bag design) to the standard harvesting bag design. This was performed in a laboratory as well as a field setting. Methods (Laboratory phase): 36 participants (12 males and 24 females) were assigned to one worker group. The “tall ladder worker” group was comprised of only males and the “step ladder worker” and “ground worker” group of females. Each participant was required to simulate a citrus harvesting task while utilizing each of the bag designs on different days. On each day/test session, participants performed three harvesting cycles. Muscle activity was measured throughout the entire testing session and RPE were recorded at the end of each cycle. Results (Laboratory phase): The EMG and RPE results indicate that the backpack design was the most ideal design to reduce asymmetry, while the standard harvesting bag design was the worst. Although not significant, there was greater muscle asymmetry (p=0.109) and a significantly higher perceived exertion when using the standard bag (p=0.0004), in comparison to using the backpack. Methods (Field phase): 17 Xhosa-speaking citrus harvesters (6 females and 11 males) participated in this study. Each harvester worked with one of the three bag designs on a different day. Productivity of each worker was assessed every hour by recording the number of bags filled with fruit and at the end of the shift. A Perceived Usefulness & Ease of Use questionnaire was presented to each participant to obtain feedback on worker acceptance to the new bag designs. Results (Field phase): A general trend in support of the hip belt bag design over the other two bag designs were found, even within the different worker demographic groups (age, sex and worker experience). The workers perceived less exertion (7.98 ± 1.86) and were more productive (9.90 ± 2.11 bags/hour) when using the hip belt design; they also found this bag the most useful (1.02 ± 0.09) and easy to use (1.07 ± 0.25). In contrast, the backpack bag design had significantly poorer responses when compared to the other two bag designs and this was evident in all the dependent variables assessed (RPE, productivity and PUEU). Conclusion: The results from the laboratory phase supported the expectation that the backpack bag design reduces asymmetry and hence, is more suitable than the standard harvesting bag. However, results from the field show that the hip belt bag design was the most preferred and the backpack was the least preferred. Bao & Shahnavaz (1989) highlight the need for ergonomics researcher to convey laboratory findings into the field context. However, as shown by the current study, there are numerous challenges associated with field work, making it difficult for laboratory findings to be successfully conveyed to the field. Limitations and Recommendations: For the laboratory phase of the project, no biomechanical and cardiovascular responses were assessed. However, for a holistic approach, these variables should be considered in future studies. Due to high variability from one harvesting cycle to another, more than three harvesting cycles should also be performed to accurately replicate the harvesting process as done in the field over extended durations of time. For the field phase, data should be collected from more than one citrus farm and thus a larger sample size could be obtained. This would improve the validity of the study. In addition to this, data should be collected for a full working day, especially if environmental conditions are not a hindrance, as well as for a whole season, since workloads vary, depending on the time of the harvesting season. , Name on Graduation Programme: Bassey-Duke, Elizabeth Missan
- Full Text:
- Date Issued: 2015
- Authors: Bassey-Duke, Elizabeth Misan
- Date: 2015
- Subjects: Citrus -- Harvesting -- South Africa -- Eastern Cape , Lifting and carrying -- South Africa -- Eastern Cape , Manual work -- South Africa -- Eastern Cape , Blue collar workers -- South Africa -- Eastern Cape , Work -- Physiological aspects , Human mechanics
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5176 , http://hdl.handle.net/10962/d1018908
- Description: Background: Agriculture plays a vital role in the economy of any industrially developing country, including South Africa. In the Eastern Cape of South Africa citrus farming is a significant contributor to the local economy (Johnson et al., 2005). The harvesting phase of citrus farming is performed manually and exposes workers to physical risks, which can lead to the development of musculoskeletal disorders. In particular, the standard harvesting bag comprises of a single shoulder strap and promotes asymmetrical load carriage which results in shoulder and lower back pain complaints. The current study compared the physiological (EMG), perceptual (RPE), usability (PUEU) and productivity effects of two new harvesting bag designs (a hip belt and a backpack bag design) to the standard harvesting bag design. This was performed in a laboratory as well as a field setting. Methods (Laboratory phase): 36 participants (12 males and 24 females) were assigned to one worker group. The “tall ladder worker” group was comprised of only males and the “step ladder worker” and “ground worker” group of females. Each participant was required to simulate a citrus harvesting task while utilizing each of the bag designs on different days. On each day/test session, participants performed three harvesting cycles. Muscle activity was measured throughout the entire testing session and RPE were recorded at the end of each cycle. Results (Laboratory phase): The EMG and RPE results indicate that the backpack design was the most ideal design to reduce asymmetry, while the standard harvesting bag design was the worst. Although not significant, there was greater muscle asymmetry (p=0.109) and a significantly higher perceived exertion when using the standard bag (p=0.0004), in comparison to using the backpack. Methods (Field phase): 17 Xhosa-speaking citrus harvesters (6 females and 11 males) participated in this study. Each harvester worked with one of the three bag designs on a different day. Productivity of each worker was assessed every hour by recording the number of bags filled with fruit and at the end of the shift. A Perceived Usefulness & Ease of Use questionnaire was presented to each participant to obtain feedback on worker acceptance to the new bag designs. Results (Field phase): A general trend in support of the hip belt bag design over the other two bag designs were found, even within the different worker demographic groups (age, sex and worker experience). The workers perceived less exertion (7.98 ± 1.86) and were more productive (9.90 ± 2.11 bags/hour) when using the hip belt design; they also found this bag the most useful (1.02 ± 0.09) and easy to use (1.07 ± 0.25). In contrast, the backpack bag design had significantly poorer responses when compared to the other two bag designs and this was evident in all the dependent variables assessed (RPE, productivity and PUEU). Conclusion: The results from the laboratory phase supported the expectation that the backpack bag design reduces asymmetry and hence, is more suitable than the standard harvesting bag. However, results from the field show that the hip belt bag design was the most preferred and the backpack was the least preferred. Bao & Shahnavaz (1989) highlight the need for ergonomics researcher to convey laboratory findings into the field context. However, as shown by the current study, there are numerous challenges associated with field work, making it difficult for laboratory findings to be successfully conveyed to the field. Limitations and Recommendations: For the laboratory phase of the project, no biomechanical and cardiovascular responses were assessed. However, for a holistic approach, these variables should be considered in future studies. Due to high variability from one harvesting cycle to another, more than three harvesting cycles should also be performed to accurately replicate the harvesting process as done in the field over extended durations of time. For the field phase, data should be collected from more than one citrus farm and thus a larger sample size could be obtained. This would improve the validity of the study. In addition to this, data should be collected for a full working day, especially if environmental conditions are not a hindrance, as well as for a whole season, since workloads vary, depending on the time of the harvesting season. , Name on Graduation Programme: Bassey-Duke, Elizabeth Missan
- Full Text:
- Date Issued: 2015
An evaluation of change communication in ensuring the sustainability of change at Barclays Africa's first "green" building
- Authors: Magubane, Nokuzola
- Date: 2015
- Subjects: Barclays Bank , Sustainable buildings -- South Africa -- Johannesburg , Organizational change -- South Africa -- Johannesburg , Communication in organizations
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:849 , http://hdl.handle.net/10962/d1017517
- Description: The purpose of the study was to conduct an evaluation on the effectiveness of the change communications distributed to the occupants of Barclays Towers West, Barclays Africa‟s first green building, in ensuring the sustainability of the change after the move into the building. In addition, recommendations are made to improve the change communications directed towards the building occupants to ensure the sustainability of the change and for future moves to green buildings. The research paper is made up of the following three distinct sections: Section One – Evaluation Research Report: this section outlines the organisational and research context for the study, the objectives of the research and rationale for conducting the research. A brief overview of the key theories and models on change communication that were utilised in the study are discussed, and definitions of important terms are presented. The research methodology is also described which includes an explanation on the evaluation research approach utilised as well as the use of both qualitative and quantitative data in the study. In addition, the results from the research conducted are presented, based on three data collection methods utilised: document analysis, semi-structured interviews and a survey. The results are then analysed and discussed in relation to the literature reviewed on change communication. Recommendations are made on improvements that can be made to the change communications to ensure the sustainability of the change. Section Two – Literature Review: the literature, theories and important concept definitions of organisational change management, change sustainability, change communication and green buildings which are relevant for the research topic and have been used as the theoretical base of the study are explored in this section. A key component of the literature review is the description of the change communication theories and models: communication theory, Armenakis, Harris and Field (2007) Model, and the Barrett (2002) Model. An understanding of the theories and models is imperative, as the effectiveness of the change communications after the move into Barclays Towers West is assessed based on the elements of the change communication theories and models. Section Three – Research Methodology: the research methodology for the study is described in this section. Specifically, the research aims and objectives, the research paradigm, the population and sampling, data collection, data analysis and ethical considerations are outlined. A key component of the section is the explanation on how the data was collected and analysed in the study and the sequence. The post move communications and artefacts and meeting presentations were collected first. The qualitative data was analysed and used to determine the questions for the semi structured interviews. Semi-structured one on one interviews were then conducted. The qualitative data and the change communication theories and models used in this study were used to determine the questions for the online survey. An online survey tool was used to administer a predominantly five point Likert scale questionnaire with an invitation to participate emailed to the building occupants. The quantitative data was analysed using descriptive statistical analysis. Research Findings: The key research findings revealed that the messages communicated to the occupants after the move into the building have been mainly focused on operational matters and rarely on educating occupants on the green aspects of the building. A large majority of the survey respondents were aware of the building facilities, details and required behaviour. However it was found that the occupants, Line Managers and Senior Management are not displaying the required behaviour for a green building and do not know how to use some of the building facilities. A major gap was found in communicating with people moving into the building. In addition it was found that some of the information communicated to occupants is outdated. Written communications are used extensively and face to face communication is rarely used to communicate with the occupants. As a result, a number of changes are required to improve the effectiveness of the change communications to the occupants of Barclays Towers West. The improvements include communicating to new occupants; utilising additional communication channels; focusing communication messages on educating occupants on the strategic objectives for the building; rationale for building features and facilities; how to use the facilities and the impact of their behaviour on the building objectives being achieved.
- Full Text:
- Date Issued: 2015
- Authors: Magubane, Nokuzola
- Date: 2015
- Subjects: Barclays Bank , Sustainable buildings -- South Africa -- Johannesburg , Organizational change -- South Africa -- Johannesburg , Communication in organizations
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:849 , http://hdl.handle.net/10962/d1017517
- Description: The purpose of the study was to conduct an evaluation on the effectiveness of the change communications distributed to the occupants of Barclays Towers West, Barclays Africa‟s first green building, in ensuring the sustainability of the change after the move into the building. In addition, recommendations are made to improve the change communications directed towards the building occupants to ensure the sustainability of the change and for future moves to green buildings. The research paper is made up of the following three distinct sections: Section One – Evaluation Research Report: this section outlines the organisational and research context for the study, the objectives of the research and rationale for conducting the research. A brief overview of the key theories and models on change communication that were utilised in the study are discussed, and definitions of important terms are presented. The research methodology is also described which includes an explanation on the evaluation research approach utilised as well as the use of both qualitative and quantitative data in the study. In addition, the results from the research conducted are presented, based on three data collection methods utilised: document analysis, semi-structured interviews and a survey. The results are then analysed and discussed in relation to the literature reviewed on change communication. Recommendations are made on improvements that can be made to the change communications to ensure the sustainability of the change. Section Two – Literature Review: the literature, theories and important concept definitions of organisational change management, change sustainability, change communication and green buildings which are relevant for the research topic and have been used as the theoretical base of the study are explored in this section. A key component of the literature review is the description of the change communication theories and models: communication theory, Armenakis, Harris and Field (2007) Model, and the Barrett (2002) Model. An understanding of the theories and models is imperative, as the effectiveness of the change communications after the move into Barclays Towers West is assessed based on the elements of the change communication theories and models. Section Three – Research Methodology: the research methodology for the study is described in this section. Specifically, the research aims and objectives, the research paradigm, the population and sampling, data collection, data analysis and ethical considerations are outlined. A key component of the section is the explanation on how the data was collected and analysed in the study and the sequence. The post move communications and artefacts and meeting presentations were collected first. The qualitative data was analysed and used to determine the questions for the semi structured interviews. Semi-structured one on one interviews were then conducted. The qualitative data and the change communication theories and models used in this study were used to determine the questions for the online survey. An online survey tool was used to administer a predominantly five point Likert scale questionnaire with an invitation to participate emailed to the building occupants. The quantitative data was analysed using descriptive statistical analysis. Research Findings: The key research findings revealed that the messages communicated to the occupants after the move into the building have been mainly focused on operational matters and rarely on educating occupants on the green aspects of the building. A large majority of the survey respondents were aware of the building facilities, details and required behaviour. However it was found that the occupants, Line Managers and Senior Management are not displaying the required behaviour for a green building and do not know how to use some of the building facilities. A major gap was found in communicating with people moving into the building. In addition it was found that some of the information communicated to occupants is outdated. Written communications are used extensively and face to face communication is rarely used to communicate with the occupants. As a result, a number of changes are required to improve the effectiveness of the change communications to the occupants of Barclays Towers West. The improvements include communicating to new occupants; utilising additional communication channels; focusing communication messages on educating occupants on the strategic objectives for the building; rationale for building features and facilities; how to use the facilities and the impact of their behaviour on the building objectives being achieved.
- Full Text:
- Date Issued: 2015
An evaluation of the implementation of Mercedes Benz production system (MPS) and the employee change readiness at Mercedes Benz commercial vehicles South Africa
- Authors: McAllister, Rozane Ronardo
- Date: 2015
- Subjects: Daimler-Benz Aktiengesellschaft , Organizational change -- South Africa , Organizational behavior -- South Africa , Employees -- Attitudes , Continuous improvement process -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:850 , http://hdl.handle.net/10962/d1017518
- Description: The evaluation report section describes the evaluation of the implementation of Mercedes Benz Production System (MPS) at Mercedes Benz Commercial Vehicles, which is a division of Mercedes Benz South Africa’s manufacturing plant situated in East London. The section evaluates the changes the implementation of MPS brought to the Key Performance Indicators (KPI’S) of the division and evaluates the change readiness of the employees in the division prior to the change. The change implementation was initiated by the management of MBCV as a strategic organisational change to bring about continuous improvement to the KPI’s of the organisation. These KPI’s are Safety, Quality, Delivery, Cost and Morale (SQDCM). The reason behind the change at the time was deemed critical to MBCV in order to meet the annual KPI targets and remain cost competitive and sustainable. The evaluation report further describes the results of the change with regards to the organisational KPI’s and the level of employee change readiness which was conducted through a questionnaire survey. A brief literature review is included in the Evaluation Report under section one describing key concepts about Production Systems, Lean Manufacturing and Change Management. The evaluation section includes recommendations based on the results of the research findings and ends with a conclusion. The literature review section explores the literature that supports production systems, lean manufacturing and change management concepts, its definitions, importance and benefits. The literature review describes and critiques key concepts of the research such as productions systems, MPS in particular, lean manufacturing concepts and related change management topics relevant to the research. The literature review defines production systems and the concepts of lean manufacturing, highlighting the benefits of the concepts to enhance organisations’ manufacturing capabilities. An integrated part of lean manufacturing is people and the implementation of lean manufacturing into an organisation requires change management theories therefore key understanding in this particular research was to discuss change management concepts, in particular, employee change readiness. The literature will discuss different tools to assess employee change readiness and from this develop an employee change readiness tool. The change management concepts evaluated change readiness and the consequences if organisations are not ready for change. The research methodology section describes how that the research was conducted in two phases, one to evaluate the implementation of MPS with regards to the organisational KPI’s (SQDCM). This was assessed through reports from projects and presentations made by the project teams on improvements of the organisational KPI’s. The second phase evaluated the change readiness of the employees prior to the implementation of MPS. This phase of the research was intended to retrieve quantitative data with an adapted questionnaire which was distributed to employees. To evaluate the change readiness, a change model known as ADKAR was used as an evaluation instrument. The modified ADKAR questionnaire was distributed to employees in hard copies and completed during a weekly team meeting. The results were summarised and descriptive statistics were used to analyse the final results. Microsoft Excel (2010 version) was used to illustrate and display the graphs. Section three discussed the research methodology in more detail. The study shows that although there were some positive changes that came from the implementation of MPS in MBCV, especially to the following KPI’s (Safety, Quality, Delivery and Cost), real consideration should be given to employee morale and the level of change readiness of MBCV employees.
- Full Text:
- Date Issued: 2015
- Authors: McAllister, Rozane Ronardo
- Date: 2015
- Subjects: Daimler-Benz Aktiengesellschaft , Organizational change -- South Africa , Organizational behavior -- South Africa , Employees -- Attitudes , Continuous improvement process -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:850 , http://hdl.handle.net/10962/d1017518
- Description: The evaluation report section describes the evaluation of the implementation of Mercedes Benz Production System (MPS) at Mercedes Benz Commercial Vehicles, which is a division of Mercedes Benz South Africa’s manufacturing plant situated in East London. The section evaluates the changes the implementation of MPS brought to the Key Performance Indicators (KPI’S) of the division and evaluates the change readiness of the employees in the division prior to the change. The change implementation was initiated by the management of MBCV as a strategic organisational change to bring about continuous improvement to the KPI’s of the organisation. These KPI’s are Safety, Quality, Delivery, Cost and Morale (SQDCM). The reason behind the change at the time was deemed critical to MBCV in order to meet the annual KPI targets and remain cost competitive and sustainable. The evaluation report further describes the results of the change with regards to the organisational KPI’s and the level of employee change readiness which was conducted through a questionnaire survey. A brief literature review is included in the Evaluation Report under section one describing key concepts about Production Systems, Lean Manufacturing and Change Management. The evaluation section includes recommendations based on the results of the research findings and ends with a conclusion. The literature review section explores the literature that supports production systems, lean manufacturing and change management concepts, its definitions, importance and benefits. The literature review describes and critiques key concepts of the research such as productions systems, MPS in particular, lean manufacturing concepts and related change management topics relevant to the research. The literature review defines production systems and the concepts of lean manufacturing, highlighting the benefits of the concepts to enhance organisations’ manufacturing capabilities. An integrated part of lean manufacturing is people and the implementation of lean manufacturing into an organisation requires change management theories therefore key understanding in this particular research was to discuss change management concepts, in particular, employee change readiness. The literature will discuss different tools to assess employee change readiness and from this develop an employee change readiness tool. The change management concepts evaluated change readiness and the consequences if organisations are not ready for change. The research methodology section describes how that the research was conducted in two phases, one to evaluate the implementation of MPS with regards to the organisational KPI’s (SQDCM). This was assessed through reports from projects and presentations made by the project teams on improvements of the organisational KPI’s. The second phase evaluated the change readiness of the employees prior to the implementation of MPS. This phase of the research was intended to retrieve quantitative data with an adapted questionnaire which was distributed to employees. To evaluate the change readiness, a change model known as ADKAR was used as an evaluation instrument. The modified ADKAR questionnaire was distributed to employees in hard copies and completed during a weekly team meeting. The results were summarised and descriptive statistics were used to analyse the final results. Microsoft Excel (2010 version) was used to illustrate and display the graphs. Section three discussed the research methodology in more detail. The study shows that although there were some positive changes that came from the implementation of MPS in MBCV, especially to the following KPI’s (Safety, Quality, Delivery and Cost), real consideration should be given to employee morale and the level of change readiness of MBCV employees.
- Full Text:
- Date Issued: 2015
An examination of the Mobisam project and Grocott's Mail : towards mobile social accountability monitoring in Grahamstown
- Authors: Reinecke, Romi Kami
- Date: 2015
- Subjects: Grocott's Mail (Grahamstown, South Africa) , Electronic discussion groups -- South Africa -- Grahamstown , Citizen journalism -- South Africa -- Grahamstown , Municipal services -- South Africa -- Grahamstown , Government accountability -- South Africa -- Grahamstown , Social action -- South Africa -- Grahamstown , Municipal services -- Citizen participation , Municipal government -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3541 , http://hdl.handle.net/10962/d1017782
- Description: This thesis critically examines the nature and purpose of the MobiSAM partnership, in relation to its value as a model resonating with normative theories on the role of the media in South African democratic society. The MobiSAM project introduces a mobile polling application, designed for citizens to provide real-time, user-generated data on crucial municipal service delivery such as clean water in Grahamstown, Eastern Cape, South Africa. The project has partnered with the local community newspaper, Grocott's Mail, to broadcast this data, with the aim to facilitate citizen participation in public problem solving and support local government accountability in service delivery. Despite pervasive poverty in areas such as the Eastern Cape, mobile penetration in South Africa is near universal. The MobiSAM partnership is an ongoing effort to forge new links between social accountability monitors, new media, traditional media, citizens and local government around public issues in Grahamstown, in line with the development objectives of the post-apartheid South African state. The overall theoretical framework for this thesis is taken from Christians, Glasser, McQuail, Nordenstreng and White's Normative Theories of the Media, which provides an analysis of four roles of the media in a democratic society, that is: the monitorial, the facilitative, the radical and the collaborative roles. Within each of these roles, the stated journalistic approach is explored, that is investigative journalism, public journalism, radical journalism and development journalism. Public journalism is focused on as having the most resonance with the goals of the MobiSAM partnership. The chosen research design is a critical realist case study with the selected methods of thematic document analysis and, primarily, in-depth interviews with key project participants. The research goals were to analyse this primary data against the normative theory on the role of the media in a democratic society, and the 'real world' constraints posed by the project’s specific political and socioeconomic context. The findings conclude by offering certain recommendations and areas for further research, such as the central importance of a dedicated municipal reporter for covering complex public issues. This critical realist case study, drawing on qualitative interviews with both the accountability monitors and the media practitioners, interrogates the philosophical understandings on the role of the media in this new project, towards an empirical model for advancing substantive socio-economic change through media in South Africa.
- Full Text:
- Date Issued: 2015
- Authors: Reinecke, Romi Kami
- Date: 2015
- Subjects: Grocott's Mail (Grahamstown, South Africa) , Electronic discussion groups -- South Africa -- Grahamstown , Citizen journalism -- South Africa -- Grahamstown , Municipal services -- South Africa -- Grahamstown , Government accountability -- South Africa -- Grahamstown , Social action -- South Africa -- Grahamstown , Municipal services -- Citizen participation , Municipal government -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3541 , http://hdl.handle.net/10962/d1017782
- Description: This thesis critically examines the nature and purpose of the MobiSAM partnership, in relation to its value as a model resonating with normative theories on the role of the media in South African democratic society. The MobiSAM project introduces a mobile polling application, designed for citizens to provide real-time, user-generated data on crucial municipal service delivery such as clean water in Grahamstown, Eastern Cape, South Africa. The project has partnered with the local community newspaper, Grocott's Mail, to broadcast this data, with the aim to facilitate citizen participation in public problem solving and support local government accountability in service delivery. Despite pervasive poverty in areas such as the Eastern Cape, mobile penetration in South Africa is near universal. The MobiSAM partnership is an ongoing effort to forge new links between social accountability monitors, new media, traditional media, citizens and local government around public issues in Grahamstown, in line with the development objectives of the post-apartheid South African state. The overall theoretical framework for this thesis is taken from Christians, Glasser, McQuail, Nordenstreng and White's Normative Theories of the Media, which provides an analysis of four roles of the media in a democratic society, that is: the monitorial, the facilitative, the radical and the collaborative roles. Within each of these roles, the stated journalistic approach is explored, that is investigative journalism, public journalism, radical journalism and development journalism. Public journalism is focused on as having the most resonance with the goals of the MobiSAM partnership. The chosen research design is a critical realist case study with the selected methods of thematic document analysis and, primarily, in-depth interviews with key project participants. The research goals were to analyse this primary data against the normative theory on the role of the media in a democratic society, and the 'real world' constraints posed by the project’s specific political and socioeconomic context. The findings conclude by offering certain recommendations and areas for further research, such as the central importance of a dedicated municipal reporter for covering complex public issues. This critical realist case study, drawing on qualitative interviews with both the accountability monitors and the media practitioners, interrogates the philosophical understandings on the role of the media in this new project, towards an empirical model for advancing substantive socio-economic change through media in South Africa.
- Full Text:
- Date Issued: 2015
An exploration of business level strategy at the bottom of the pyramid: a case study of Twizza, Eastern Cape
- Authors: Sityoshwana, Ludwe Lusu
- Date: 2015
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/54486 , vital:26569
- Description: This qualitative study focuses on business level strategy adopted by Twizza to compete in the bottom of the pyramid market in the Eastern Cape, South Africa. Twizza enjoyed huge success between the years 2010 - 2014 as a medium to large sized manufacturer of carbonated soft drinks in the Eastern Cape. In light of this, the current study seeks to answer the following: What business level strategy did top management at Twizza adopt to compete and grow in the BoP market in the Eastern Cape, South Africa? The study takes the form of a case study to explore and understand the patterns of decisions adopted by Twizza’s top management in competing at the bottom of the pyramid. As such, the main objective of the study was to identify the business level strategy adopted by Twizza which enabled their superior performance within the BoP market. The study adopts Porter`s typology to explore business level strategy. Stratified, purposive sampling was used to identify 4 top managers as participants in this study. A total of 7, semi-structured, interviews were used to collect critical incidents from top management of Twizza. This was the primary data used in this study. This type of data was combined with relevant information which was gathered via published press articles and on-line commentary. The study found that central to Twizza’s business strategy were four pillars, namely, strict control and management of manufacturing costs, product quality equal to that of market leaders, the ability of the organisation to manufacture its own raw materials and ability to ensure product availability to the market to the market. These findings reveal that Twizza employed a hybrid strategy, anchored by cost leadership. Thus, Twizza incorporated elements of differentiation and best value strategies to offer its customers affordable quality.
- Full Text:
- Date Issued: 2015
- Authors: Sityoshwana, Ludwe Lusu
- Date: 2015
- Language: English
- Type: text , Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10962/54486 , vital:26569
- Description: This qualitative study focuses on business level strategy adopted by Twizza to compete in the bottom of the pyramid market in the Eastern Cape, South Africa. Twizza enjoyed huge success between the years 2010 - 2014 as a medium to large sized manufacturer of carbonated soft drinks in the Eastern Cape. In light of this, the current study seeks to answer the following: What business level strategy did top management at Twizza adopt to compete and grow in the BoP market in the Eastern Cape, South Africa? The study takes the form of a case study to explore and understand the patterns of decisions adopted by Twizza’s top management in competing at the bottom of the pyramid. As such, the main objective of the study was to identify the business level strategy adopted by Twizza which enabled their superior performance within the BoP market. The study adopts Porter`s typology to explore business level strategy. Stratified, purposive sampling was used to identify 4 top managers as participants in this study. A total of 7, semi-structured, interviews were used to collect critical incidents from top management of Twizza. This was the primary data used in this study. This type of data was combined with relevant information which was gathered via published press articles and on-line commentary. The study found that central to Twizza’s business strategy were four pillars, namely, strict control and management of manufacturing costs, product quality equal to that of market leaders, the ability of the organisation to manufacture its own raw materials and ability to ensure product availability to the market to the market. These findings reveal that Twizza employed a hybrid strategy, anchored by cost leadership. Thus, Twizza incorporated elements of differentiation and best value strategies to offer its customers affordable quality.
- Full Text:
- Date Issued: 2015
An exploration of the school nutrition programme's potential to catalyse community-based environmental learning : a case study of a rural Eastern Cape school
- Authors: Tshabeni, Veliswa
- Date: 2015
- Subjects: National School Nutrition Programme (South Africa) , School children -- Food -- South Africa -- Eastern Cape , Children -- Nutrition -- South Africa -- Eastern Cape , Environmental education -- South Africa -- Eastern Cape , Social learning -- South Africa -- Eastern Cape , Food security -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2063 , http://hdl.handle.net/10962/d1020306
- Description: The purpose of this study was to explore the extent to which a School Nutrition Programme can catalyse community-based environmental learning and promote food security in the school and the community. This is an interpretive case study of a junior secondary school in the rural Eastern Cape province of South Africa. The school is located in an area characterised by high levels of poverty and under-nutrition. The school’s food garden, a central focus of this study, contributes to the School Nutrition Programme, which falls under the National School Nutrition Programme (NSNP). The aim of the NSNP is to alleviate poverty in public schools. This case study was conducted by means of questionnaires, semi-structured interviews, and document analysis and field observations. The data set was analysed, firstly, to ascertain if the School Nutrition Programme functions as a community of practise (Wenger, 1998). Thereafter, the data set was analysed to identify the knowledge related to food security and environmental sustainability that is learned and shared in the School Nutrition Programme, and also how such learning took place. The study found that the School’s Nutrition Programme was indeed operating as a community of practice and that it created a platform for sharing explicit and tacit knowledge and skills related to food security and environmental sustainability. The case study also revealed the contextual and experience-based nature of knowledge related to food cultivation.
- Full Text:
- Date Issued: 2015
- Authors: Tshabeni, Veliswa
- Date: 2015
- Subjects: National School Nutrition Programme (South Africa) , School children -- Food -- South Africa -- Eastern Cape , Children -- Nutrition -- South Africa -- Eastern Cape , Environmental education -- South Africa -- Eastern Cape , Social learning -- South Africa -- Eastern Cape , Food security -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2063 , http://hdl.handle.net/10962/d1020306
- Description: The purpose of this study was to explore the extent to which a School Nutrition Programme can catalyse community-based environmental learning and promote food security in the school and the community. This is an interpretive case study of a junior secondary school in the rural Eastern Cape province of South Africa. The school is located in an area characterised by high levels of poverty and under-nutrition. The school’s food garden, a central focus of this study, contributes to the School Nutrition Programme, which falls under the National School Nutrition Programme (NSNP). The aim of the NSNP is to alleviate poverty in public schools. This case study was conducted by means of questionnaires, semi-structured interviews, and document analysis and field observations. The data set was analysed, firstly, to ascertain if the School Nutrition Programme functions as a community of practise (Wenger, 1998). Thereafter, the data set was analysed to identify the knowledge related to food security and environmental sustainability that is learned and shared in the School Nutrition Programme, and also how such learning took place. The study found that the School’s Nutrition Programme was indeed operating as a community of practice and that it created a platform for sharing explicit and tacit knowledge and skills related to food security and environmental sustainability. The case study also revealed the contextual and experience-based nature of knowledge related to food cultivation.
- Full Text:
- Date Issued: 2015
An exploration of the structural, cultural and agential conditions that shape life skills teachers' responses and experiences in teaching sexuality and HIV and AIDS
- Authors: Hakaala, Beatha Ndinelao
- Date: 2015
- Subjects: Life skills -- Study and teaching (Secondary) -- Namibia , Sex instruction -- Study and teaching (Secondary) -- Namibia , HIV infections -- Study and teaching (Secondary) -- Namibia , AIDS (Disease) -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2029 , http://hdl.handle.net/10962/d1017340
- Description: This paper reports findings on how Namibian secondary school Life Skills teachers are exercising their agency to teach or not to teach Sexuality and HIV and AIDS, a subject which is regarded as sensitive and has been surrounded by secrecy and has issues which are cloaked by silence and taboos. The aim of the study was to explore the structural and cultural factors that shape the responses and experiences of Life Skills teachers in teaching sexuality and HIV and AIDS. The study was conducted through observations and interviews with four full-time Life Skills teachers. Document analysis was carried out throughout the study in which lesson plans, portfolios, assessment forms, Life Skills syllabuses, schemes of works, national curriculum documents and subject policy on HIV and AIDS were analysed. The data were analysed by identifying categories, codes and themes using the analytic dualism framework, and the literature review was used to summarise the findings. The study revealed that all teachers operate in an environment that consists of the National structures such as high teacher: learner ratio in their classrooms that they have to teach Life Skills and do day to day counselling, a lack of teaching and learning support material that they should use to scaffold the learning of sexuality and HIV and AIDS, and little time allocated to Life Skills teaching. The same study also revealed that the teaching of Life Skills is hampered by the cultural structures which emerged from teachers’ discourses as evidenced from the data which shows that cultural properties have powers that condition teachers in teaching sexuality and HIV and AIDS. This included learners’ silence in sex-related discussion versus teachers’ position; discourses on the importance of full-time Life Skills teachers in school; comfort in teaching selected topics in Life Skills; Life Skills teachers’ perceptions on parents’ feelings on teaching sexuality and HIV and AIDS in schools, and perceptions on the Life Skills teachers’ position and teaching sexuality and sex education. While the findings revealed that teachers are conditioned by the structural and cultural conditions that acted as constraints to teaching sexuality and HIV and AIDS, the observations revealed agency on their part. The study finding depicts instances where teachers acted in agreement or in contravention of the structural and cultural pressures or conditions in their environments.
- Full Text:
- Date Issued: 2015
- Authors: Hakaala, Beatha Ndinelao
- Date: 2015
- Subjects: Life skills -- Study and teaching (Secondary) -- Namibia , Sex instruction -- Study and teaching (Secondary) -- Namibia , HIV infections -- Study and teaching (Secondary) -- Namibia , AIDS (Disease) -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:2029 , http://hdl.handle.net/10962/d1017340
- Description: This paper reports findings on how Namibian secondary school Life Skills teachers are exercising their agency to teach or not to teach Sexuality and HIV and AIDS, a subject which is regarded as sensitive and has been surrounded by secrecy and has issues which are cloaked by silence and taboos. The aim of the study was to explore the structural and cultural factors that shape the responses and experiences of Life Skills teachers in teaching sexuality and HIV and AIDS. The study was conducted through observations and interviews with four full-time Life Skills teachers. Document analysis was carried out throughout the study in which lesson plans, portfolios, assessment forms, Life Skills syllabuses, schemes of works, national curriculum documents and subject policy on HIV and AIDS were analysed. The data were analysed by identifying categories, codes and themes using the analytic dualism framework, and the literature review was used to summarise the findings. The study revealed that all teachers operate in an environment that consists of the National structures such as high teacher: learner ratio in their classrooms that they have to teach Life Skills and do day to day counselling, a lack of teaching and learning support material that they should use to scaffold the learning of sexuality and HIV and AIDS, and little time allocated to Life Skills teaching. The same study also revealed that the teaching of Life Skills is hampered by the cultural structures which emerged from teachers’ discourses as evidenced from the data which shows that cultural properties have powers that condition teachers in teaching sexuality and HIV and AIDS. This included learners’ silence in sex-related discussion versus teachers’ position; discourses on the importance of full-time Life Skills teachers in school; comfort in teaching selected topics in Life Skills; Life Skills teachers’ perceptions on parents’ feelings on teaching sexuality and HIV and AIDS in schools, and perceptions on the Life Skills teachers’ position and teaching sexuality and sex education. While the findings revealed that teachers are conditioned by the structural and cultural conditions that acted as constraints to teaching sexuality and HIV and AIDS, the observations revealed agency on their part. The study finding depicts instances where teachers acted in agreement or in contravention of the structural and cultural pressures or conditions in their environments.
- Full Text:
- Date Issued: 2015
An in-silico investigation of Morita-Baylis-Hillman accessible heterocyclic analogues for applications as novel HIV-1 C protease inhibitors
- Authors: Sigauke, Lester Takunda
- Date: 2015
- Subjects: Protease inhibitors , Heterocyclic compounds , HIV (Viruses) , HIV infections , Drug resistance , Cheminformatics
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4152 , http://hdl.handle.net/10962/d1017913
- Description: Cheminformatic approaches have been employed to optimize the bis-coumarin scaffold identified by Onywera et al. (2012) as a potential hit against the protease HIV-1 protein. The Open Babel library of commands was used to access functions that were incorporated into a markov chain recursive program that generated 17750 analogues of the bis-coumarin scaffold. The Morita-Baylis-Hillman accessible heterocycles were used to introduce structural diversity within the virtual library. In silico high through-put virtual screening using AutoDock Vina was used to rapidly screen the virtual library ligand set against 61 protease models built by Onywera et al. (2012). CheS-Mapper computed a principle component analysis of the compounds based on 13 selected chemical descriptors. The compounds were plotted against the principle component analysis within a 3 dimensional chemical space in order to inspect the diversity of the virtual library. The physicochemical properties and binding affinities were used to identify the top 3 performing ligands. ACPYPE was used to inspect the constitutional properties and eliminated virtual compounds that possessed open valences. Chromene based ligand 805 and ligand 6610 were selected as the lead candidates from the high-throughput virtual screening procedure we employed. Molecular dynamic simulations of the lead candidates performed for 5 ns allowed the stability of the ligand protein complexes with protease model 305152. The free energy of binding of the leads with protease model 305152 was computed over the first 50 ps of simulation using the molecular mechanics Poisson-Boltzmann method. Analysis structural features and energy profiles from molecular dynamic simulations of the protein–ligand complexes indicated that although ligand 805 had a weaker binding affinity in terms of docking, it outperformed ligand 6610 in terms of complex stability and free energy of binding. Medicinal chemistry approaches will be used to optimize the lead candidates before their analogues will be synthesized and assayed for in vivo protease activity.
- Full Text:
- Date Issued: 2015
- Authors: Sigauke, Lester Takunda
- Date: 2015
- Subjects: Protease inhibitors , Heterocyclic compounds , HIV (Viruses) , HIV infections , Drug resistance , Cheminformatics
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4152 , http://hdl.handle.net/10962/d1017913
- Description: Cheminformatic approaches have been employed to optimize the bis-coumarin scaffold identified by Onywera et al. (2012) as a potential hit against the protease HIV-1 protein. The Open Babel library of commands was used to access functions that were incorporated into a markov chain recursive program that generated 17750 analogues of the bis-coumarin scaffold. The Morita-Baylis-Hillman accessible heterocycles were used to introduce structural diversity within the virtual library. In silico high through-put virtual screening using AutoDock Vina was used to rapidly screen the virtual library ligand set against 61 protease models built by Onywera et al. (2012). CheS-Mapper computed a principle component analysis of the compounds based on 13 selected chemical descriptors. The compounds were plotted against the principle component analysis within a 3 dimensional chemical space in order to inspect the diversity of the virtual library. The physicochemical properties and binding affinities were used to identify the top 3 performing ligands. ACPYPE was used to inspect the constitutional properties and eliminated virtual compounds that possessed open valences. Chromene based ligand 805 and ligand 6610 were selected as the lead candidates from the high-throughput virtual screening procedure we employed. Molecular dynamic simulations of the lead candidates performed for 5 ns allowed the stability of the ligand protein complexes with protease model 305152. The free energy of binding of the leads with protease model 305152 was computed over the first 50 ps of simulation using the molecular mechanics Poisson-Boltzmann method. Analysis structural features and energy profiles from molecular dynamic simulations of the protein–ligand complexes indicated that although ligand 805 had a weaker binding affinity in terms of docking, it outperformed ligand 6610 in terms of complex stability and free energy of binding. Medicinal chemistry approaches will be used to optimize the lead candidates before their analogues will be synthesized and assayed for in vivo protease activity.
- Full Text:
- Date Issued: 2015
An interrogation of the representation of the San and Tonga ethnic ‘minorities’ in the Zimbabwean state-owned Chronicle, and the privately owned Newsday Southern Edition/Southern Eye newspapers during 2013
- Authors: Mlotshwa, Khanyile Joseph
- Date: 2015
- Subjects: The Chronicle (Zimbabwe) , Newsday Southern Edition/Southern Eye (Zimbabwe) , Mass media and ethnic relations -- Zimbabwe , Mass media -- Political aspects -- Zimbabwe , Mass media and nationalism -- Zimbabwe , Minorities and journalism -- Zimbabwe , Press and politics -- Zimbabwe , San (African people) -- Social conditions , Tonga (Zambezi people) -- Social conditions , Critical discourse analysis
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3549 , http://hdl.handle.net/10962/d1018546
- Description: This study critically interrogates representations of the San and Tonga in the Chronicle and the NewsDay Southern Edition/Southern Eye newspapers in 2013. It makes sense of how these representations and the journalistic practices that underwrite them position the ethnic groups as ‘minorities’ - in relation to other ethnic groups - within the discourses of Zimbabwean nationalism. Underpinned by a constructionist approach (Hall, 1997), the study makes sense of the San and Tonga identities otherwise silenced by the “bi-modal” (Ndlovu- Gatsheni, 2012: 536; Masunungure, 2006) Shona/Ndebele approach to Zimbabwean nationalism. In socio-historic terms, the study is located within the re-emergence of ‘ethnicity’ to contest Zimbabwean nationalism(s) during debates for the New Constitution leading to a Referendum in March 2013. The thesis draws on social theories that offer explanatory power in studying media representations, which include postcolonial (Bhabha, 1990, 1994; Spivak, 1995), hegemony (Gramsci, 1971), and discourse (Foucault, 1970, 1972; Laclau and Mouffe, 1985) theories. These theories speak to the ways in which discourses about identity, belonging, citizenship and democracy are constructed in situations in which unequal social power is contested. The thesis links journalism practice with the politics of representation drawing on normative theories of journalism (Christians et al, 2009), the professional ideology of journalism (Tuchman, 1972; Golding and Elliot, 1996; Hall et al., 1996), and the concept of journalists as an ‘interpretive community’ (Zelizer, 1993). These theories allow us to unmask the role of journalism’s social power in representation, and map ways in which the agency of the journalists has to be considered in relation to the structural features of the media industry in particular, and society in general. The study is qualitative and proceeds by way of combining a Critical Discourse Analysis (CDA) (Fairclough, 1992; Richardson, 2007) and ideological analysis (Thompson, 1990) of eight news texts taken from the two newspapers and in-depth interviews with 13 journalists from the two newspapers. This way we account for the media representations journalists produced: sometimes reproducing stereotypes, at other times, resisting them. Journalists not only regard themselves as belonging to the dominant ethnic groups of Shona or Ndebele, but as part of the middle class; they take Zimbabwean nationalism for granted, reproducing it as common-sense through sourcing patterns dominated by elites. This silences the San and Tonga constructing them as a ‘minority’ through a double play of invisibility and hyper visibility, where they either don’t appear in the news texts or are overly stereotyped.
- Full Text:
- Date Issued: 2015
- Authors: Mlotshwa, Khanyile Joseph
- Date: 2015
- Subjects: The Chronicle (Zimbabwe) , Newsday Southern Edition/Southern Eye (Zimbabwe) , Mass media and ethnic relations -- Zimbabwe , Mass media -- Political aspects -- Zimbabwe , Mass media and nationalism -- Zimbabwe , Minorities and journalism -- Zimbabwe , Press and politics -- Zimbabwe , San (African people) -- Social conditions , Tonga (Zambezi people) -- Social conditions , Critical discourse analysis
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3549 , http://hdl.handle.net/10962/d1018546
- Description: This study critically interrogates representations of the San and Tonga in the Chronicle and the NewsDay Southern Edition/Southern Eye newspapers in 2013. It makes sense of how these representations and the journalistic practices that underwrite them position the ethnic groups as ‘minorities’ - in relation to other ethnic groups - within the discourses of Zimbabwean nationalism. Underpinned by a constructionist approach (Hall, 1997), the study makes sense of the San and Tonga identities otherwise silenced by the “bi-modal” (Ndlovu- Gatsheni, 2012: 536; Masunungure, 2006) Shona/Ndebele approach to Zimbabwean nationalism. In socio-historic terms, the study is located within the re-emergence of ‘ethnicity’ to contest Zimbabwean nationalism(s) during debates for the New Constitution leading to a Referendum in March 2013. The thesis draws on social theories that offer explanatory power in studying media representations, which include postcolonial (Bhabha, 1990, 1994; Spivak, 1995), hegemony (Gramsci, 1971), and discourse (Foucault, 1970, 1972; Laclau and Mouffe, 1985) theories. These theories speak to the ways in which discourses about identity, belonging, citizenship and democracy are constructed in situations in which unequal social power is contested. The thesis links journalism practice with the politics of representation drawing on normative theories of journalism (Christians et al, 2009), the professional ideology of journalism (Tuchman, 1972; Golding and Elliot, 1996; Hall et al., 1996), and the concept of journalists as an ‘interpretive community’ (Zelizer, 1993). These theories allow us to unmask the role of journalism’s social power in representation, and map ways in which the agency of the journalists has to be considered in relation to the structural features of the media industry in particular, and society in general. The study is qualitative and proceeds by way of combining a Critical Discourse Analysis (CDA) (Fairclough, 1992; Richardson, 2007) and ideological analysis (Thompson, 1990) of eight news texts taken from the two newspapers and in-depth interviews with 13 journalists from the two newspapers. This way we account for the media representations journalists produced: sometimes reproducing stereotypes, at other times, resisting them. Journalists not only regard themselves as belonging to the dominant ethnic groups of Shona or Ndebele, but as part of the middle class; they take Zimbabwean nationalism for granted, reproducing it as common-sense through sourcing patterns dominated by elites. This silences the San and Tonga constructing them as a ‘minority’ through a double play of invisibility and hyper visibility, where they either don’t appear in the news texts or are overly stereotyped.
- Full Text:
- Date Issued: 2015