A cyclic approach to business continuity planning
- Authors: Botha, Jacques
- Date: 2002
- Subjects: Data recovery (Computer science) -- Planning , Data protection , Emergency management
- Language: English
- Type: Thesis , Masters , MTech (Information Technology)
- Identifier: vital:10788 , http://hdl.handle.net/10948/81 , Data recovery (Computer science) -- Planning , Data protection , Emergency management
- Description: The Information Technology (IT) industry has grown and has become an integral part in the world of business today. The importance of information, and IT in particular, will in fact only increase with time (von Solms, 1999). For a large group of organizations computer systems form the basis of their day-to-day functioning (Halliday, Badendorst & von Solms, 1996). These systems evolve at an incredible pace and this brings about a greater need for securing them, as well as the organizational information processed, transmitted and stored. This technological evolution brings about new risks for an organization’s systems and information (Halliday et. al., 1996). If IT fails, it means that the business could fail as well, creating a need for more rigorous IT management (International Business Machines Corporation, 2000). For this reason, executive management must be made aware of the potential consequences that a disaster could have on the organisation (Hawkins,Yen & Chou, 2000). A disaster could be any event that would cause a disruption in the normal day-to-day functioning of an organization. Such an event could range from a natural disaster, like a fire, an earthquake or a flood, to something more trivial, like a virus or system malfunction (Hawkins et. al., 2000). During the 1980’s a discipline known as Disaster Recovery Planning (DRP) emerged to protect an organization’s data centre, which was central to the organisation’s IT based structure, from the effects of disasters. This solution, however, focussed only on the protection of the data centre. During the early 1990’s the focus shifted towards distributed computing and client/server technology. Data centre protection and recovery were no longer enough to ensure survival. Organizations needed to ensure the continuation of their mission critical processes to support their continued goal of operations (IBM Global Services, 1999). Organizations now had to ensure that their mission critical functions could continue while the data centre was recovering from a disaster. A different approach was required. It is for this reason that Business Continuity Planning (BCP) was accepted as a formal discipline (IBM Global Services, 1999). To ensure that business continues as usual, an organization must have a plan in place that will help them ensure both the continuation and recovery of critical business processes and the recovery of the data centre, should a disaster strike (Moore, 1995). Wilson (2000) defines a business continuity plan as “a set of procedures developed for the entire enterprise, outlining the actions to be taken by the IT organization, executive staff, and the various business units in order to quickly resume operations in the event of a service interruption or an outage”. With markets being highly competitive as they are, an organization needs a detailed listing of steps to follow to ensure minimal loss due to downtime. This is very important for maintaining its competitive advantage and public stature (Wilson, 2000). The fact that the company’s reputation is at stake requires executive management to take continuity planning very serious (IBM Global Services, 1999). Ensuring continuity of business processes and recovering the IT services of an organization is not the sole responsibility of the IT department. Therefore management should be aware that they could be held liable for any consequences resulting from a disaster (Kearvell-White, 1996). Having a business continuity plan in place is important to the entire organization, as everyone, from executive management to the employees, stands to benefit from it (IBM Global Services, 1999). Despite this, numerous organizations do not have a business continuity plan in place. Organizations neglecting to develop a plan put themselves at tremendous risk and stand to loose everything (Kearvell-White, 1996).
- Full Text:
- Date Issued: 2002
- Authors: Botha, Jacques
- Date: 2002
- Subjects: Data recovery (Computer science) -- Planning , Data protection , Emergency management
- Language: English
- Type: Thesis , Masters , MTech (Information Technology)
- Identifier: vital:10788 , http://hdl.handle.net/10948/81 , Data recovery (Computer science) -- Planning , Data protection , Emergency management
- Description: The Information Technology (IT) industry has grown and has become an integral part in the world of business today. The importance of information, and IT in particular, will in fact only increase with time (von Solms, 1999). For a large group of organizations computer systems form the basis of their day-to-day functioning (Halliday, Badendorst & von Solms, 1996). These systems evolve at an incredible pace and this brings about a greater need for securing them, as well as the organizational information processed, transmitted and stored. This technological evolution brings about new risks for an organization’s systems and information (Halliday et. al., 1996). If IT fails, it means that the business could fail as well, creating a need for more rigorous IT management (International Business Machines Corporation, 2000). For this reason, executive management must be made aware of the potential consequences that a disaster could have on the organisation (Hawkins,Yen & Chou, 2000). A disaster could be any event that would cause a disruption in the normal day-to-day functioning of an organization. Such an event could range from a natural disaster, like a fire, an earthquake or a flood, to something more trivial, like a virus or system malfunction (Hawkins et. al., 2000). During the 1980’s a discipline known as Disaster Recovery Planning (DRP) emerged to protect an organization’s data centre, which was central to the organisation’s IT based structure, from the effects of disasters. This solution, however, focussed only on the protection of the data centre. During the early 1990’s the focus shifted towards distributed computing and client/server technology. Data centre protection and recovery were no longer enough to ensure survival. Organizations needed to ensure the continuation of their mission critical processes to support their continued goal of operations (IBM Global Services, 1999). Organizations now had to ensure that their mission critical functions could continue while the data centre was recovering from a disaster. A different approach was required. It is for this reason that Business Continuity Planning (BCP) was accepted as a formal discipline (IBM Global Services, 1999). To ensure that business continues as usual, an organization must have a plan in place that will help them ensure both the continuation and recovery of critical business processes and the recovery of the data centre, should a disaster strike (Moore, 1995). Wilson (2000) defines a business continuity plan as “a set of procedures developed for the entire enterprise, outlining the actions to be taken by the IT organization, executive staff, and the various business units in order to quickly resume operations in the event of a service interruption or an outage”. With markets being highly competitive as they are, an organization needs a detailed listing of steps to follow to ensure minimal loss due to downtime. This is very important for maintaining its competitive advantage and public stature (Wilson, 2000). The fact that the company’s reputation is at stake requires executive management to take continuity planning very serious (IBM Global Services, 1999). Ensuring continuity of business processes and recovering the IT services of an organization is not the sole responsibility of the IT department. Therefore management should be aware that they could be held liable for any consequences resulting from a disaster (Kearvell-White, 1996). Having a business continuity plan in place is important to the entire organization, as everyone, from executive management to the employees, stands to benefit from it (IBM Global Services, 1999). Despite this, numerous organizations do not have a business continuity plan in place. Organizations neglecting to develop a plan put themselves at tremendous risk and stand to loose everything (Kearvell-White, 1996).
- Full Text:
- Date Issued: 2002
Exploring the suitability of the evaluation criteria used in the MPT projects, by looking at hard and soft components of development programmes
- Authors: Ncapai, Wandile
- Date: 2002
- Subjects: Community development -- South Africa -- Eastern Cape , Community development , Economic development -- South Africa -- Eastern Cape , Economic development projects -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3397 , http://hdl.handle.net/10962/d1018255
- Description: The study explores the suitability of the evaluation criteria used in Microprojects Programme Trust (MPT), by looking at hard and soft components of the development programme. In this sense hard components of development refer to those components of projects that are tangible and can be physically observed and can bring material changes to the life of the community. Soft components of development refer to those components of projects that bring qualitative transformation to the life of the community, i.e. increased levels of awareness, human well-being and the empowerment process that addresses the community's abstract needs, these are not tangible and often cannot be physically observed. Midway through its contract periods MPT evaluate all projects. The purpose of these mid term evaluations is to make recommendations to MPT on future approaches and methodology for community development and operations. The mid-term evaluation also influences the distribution and allocation of resources and funding. It was therefore vital that the criteria used are subject to tests and critical analysis so as to assess their validity. The assessment of the mid-term evaluation criteria used in MPT projects has been to further determine the appropriateness or suitability of the evaluation criteria as an instrument to measure and guide the MPT community development approach in the Eastern Cape. The method used was to conduct focus group discussions so as to get an insight into the local community situation as well as to assess non-tangible improvements and changes that have occurred in the life of the community as a result of the project. The information generated was used to compare what the community believe they achieved with what the official mid-term evaluation reports indicate was assessed and achieved and that was contrasted with what the literature recommends should have been assessed. The study found that the mid-term evaluations conducted on MPT projects have no social context in which the evaluations themselves were conducted. The terms of reference and criteria were based on the programme design which was formulated and compiled by the European Union without the participation of the local South African community. The findings also indicated that projects become unsuccessful or partly successful if the "soft" components which have a bearing on social and economic realities are neglected. The thesis ends with recommendations on how the mid-term evaluations as well as MPT programme can be developed to be more responsive to the needs as identified by the communities themselves. It is strongly believed that this study will provide a valuable contribution towards increasing the ability of MPT programme to bring about both material and qualitative transformation to the I ives of the disadvantaged community of the Eastern Cape whilst ensuring that the mid-term evaluations are developed and shaped to become an appropriate instrument to measure and guide MPT programme approach to community development.
- Full Text:
- Date Issued: 2002
- Authors: Ncapai, Wandile
- Date: 2002
- Subjects: Community development -- South Africa -- Eastern Cape , Community development , Economic development -- South Africa -- Eastern Cape , Economic development projects -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3397 , http://hdl.handle.net/10962/d1018255
- Description: The study explores the suitability of the evaluation criteria used in Microprojects Programme Trust (MPT), by looking at hard and soft components of the development programme. In this sense hard components of development refer to those components of projects that are tangible and can be physically observed and can bring material changes to the life of the community. Soft components of development refer to those components of projects that bring qualitative transformation to the life of the community, i.e. increased levels of awareness, human well-being and the empowerment process that addresses the community's abstract needs, these are not tangible and often cannot be physically observed. Midway through its contract periods MPT evaluate all projects. The purpose of these mid term evaluations is to make recommendations to MPT on future approaches and methodology for community development and operations. The mid-term evaluation also influences the distribution and allocation of resources and funding. It was therefore vital that the criteria used are subject to tests and critical analysis so as to assess their validity. The assessment of the mid-term evaluation criteria used in MPT projects has been to further determine the appropriateness or suitability of the evaluation criteria as an instrument to measure and guide the MPT community development approach in the Eastern Cape. The method used was to conduct focus group discussions so as to get an insight into the local community situation as well as to assess non-tangible improvements and changes that have occurred in the life of the community as a result of the project. The information generated was used to compare what the community believe they achieved with what the official mid-term evaluation reports indicate was assessed and achieved and that was contrasted with what the literature recommends should have been assessed. The study found that the mid-term evaluations conducted on MPT projects have no social context in which the evaluations themselves were conducted. The terms of reference and criteria were based on the programme design which was formulated and compiled by the European Union without the participation of the local South African community. The findings also indicated that projects become unsuccessful or partly successful if the "soft" components which have a bearing on social and economic realities are neglected. The thesis ends with recommendations on how the mid-term evaluations as well as MPT programme can be developed to be more responsive to the needs as identified by the communities themselves. It is strongly believed that this study will provide a valuable contribution towards increasing the ability of MPT programme to bring about both material and qualitative transformation to the I ives of the disadvantaged community of the Eastern Cape whilst ensuring that the mid-term evaluations are developed and shaped to become an appropriate instrument to measure and guide MPT programme approach to community development.
- Full Text:
- Date Issued: 2002
Economic impact of international labour migration on Lesotho's development, 1986-1998: towards an international labour migration policy for the Southern African region
- Authors: Maro, Mkasafari Grace
- Date: 2002
- Subjects: Migrant labor -- South Africa , Migrant labor -- Lesotho , Foreign workers -- South Africa , Miners -- South Africa , Miners -- Labor unions -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:1058 , http://hdl.handle.net/10962/d1007496 , Migrant labor -- South Africa , Migrant labor -- Lesotho , Foreign workers -- South Africa , Miners -- South Africa , Miners -- Labor unions -- South Africa
- Description: The aim of the thesis is to identify the pressures that contributed to the rise in international labour migration in Lesotho, and to investigate how these pressures are impacting upon the modernization process in the country, particularly at a time when employment opportunities are scarce in the southern African region. International labour migration has been used as a development tool throughout history, but especially in the 20th century by developing countries with dual labour markets. Newly independent developing countries with dual labour markets adapted the strategy of import substitution industrialization (lSI), with an emphasis on protecting infant industries and promoting pro-labour policies. In the post-colonial period the international demand for lowskilled workers rose, particularly in the North (developed countries), and in mineral rich countries including the oil exporters and South Africa, and the newly industrialising countries in East Asia. International labour migration to these countries was adapted as an integral development tool by the governments of the lSI countries. Most migrants were low-skilled and temporary workers in the destination countries. Although no multilateral institutional framework existed, usually both the sending and receiving countries adapted unilateral and bilateral migration policies to guarantee the gains from migration. Workers were thus "protected" to varying degrees under such agreements. From the 1970s, the North experienced a slowdown in the growth in demand for unskilled workers. In the 1980s, many lSI countries experienced devastating economic crises that forced them to abandon the lSI policy and adapt the export-led industrialisation (EOI) policy with an emphasis on trade liberalization. The switch from lSI to EOI in developing countries with dual labour markets led to the downsizing of public sector employment, the removal of marketing boards formally used by small-scale agricultural farmers, and the expansion of export processing zones (EPZs). These outcomes resulted in a rise in push internal migration, and international migration from these countries especially to other developing countries. At the same time, since the late 1980s, capital has acquired greatly enhanced mobility at the global level. The adaptation of EOI and the full mobility of capital at the global level altered the institutional structure within which labour migration was governed both nationally, and internationally. At the national level stricter unilateral policies were reinforced by receiving countries for low-skilled labour, while less strict policies applied for skilled labour. These remain in operation in conjunction with the earlier bilateral agreements. At the international level, there remains a lack of policy to regulate international labour migration. Under the current enhanced mobility of capital, international migrants are thus left vulnerable. Lesotho fits this pattern. Faced with a dual economy and an abundance of semi-skilled labour, Lesotho has been a principal supplier of labour to the South Africa's mining industry since its independence. Lesotho's industrial diversification thus mirrors South Africa's industrial diversification. In the lSI phase (1968 - 1987), international labour migration became the most important tool of economic welfare generation in Lesotho. Bilateral agreements were signed in the early 1970s between Lesotho and South Africa to guarantee the gains from migration. Since the late I980s, the mining industry in South Africa began to downsize production and employment. Fewer novice miners from Lesotho were recruited to work in South Africa. The adaptation of the EOI policy in Lesotho in 1987 introduced EPZ industrialization and trade liberalization. Nevertheless, the retrenchment of mine workers from South Africa is occurring at a time when Lesotho is experiencing an employment crisis. The political independence of South Africa in 1994 was accompanied by stricter international migration policies by the new democratic government of South Africa. Most migrant workers in South Africa are thus now faced with a two-door policy (of the earlier bilateral agreements and the amendments to the Aliens Control Act). This system has left migrant workers vulnerable to exploitation by both employers and the law (police) in South Africa. Nevertheless, international migration from Lesotho to South Africa continues to expand, particularly of the new type of migration - semiskilled female workers in the services sector. At the same time, South Africa is also experiencing an employment crisis. The most important policy implications are, firstly, that migration is subject to the same "casualisation" as other work, with the effects made worse by the "statelessness" of migrants, who are most vulnerable to exploitation. Secondly, multilateralism is needed (e.g., SADC) and holistic, multilateral policies are required. It is clear that under the new global division of labour ad hoc policy towards international labour migration is ineffective.
- Full Text:
- Date Issued: 2002
- Authors: Maro, Mkasafari Grace
- Date: 2002
- Subjects: Migrant labor -- South Africa , Migrant labor -- Lesotho , Foreign workers -- South Africa , Miners -- South Africa , Miners -- Labor unions -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:1058 , http://hdl.handle.net/10962/d1007496 , Migrant labor -- South Africa , Migrant labor -- Lesotho , Foreign workers -- South Africa , Miners -- South Africa , Miners -- Labor unions -- South Africa
- Description: The aim of the thesis is to identify the pressures that contributed to the rise in international labour migration in Lesotho, and to investigate how these pressures are impacting upon the modernization process in the country, particularly at a time when employment opportunities are scarce in the southern African region. International labour migration has been used as a development tool throughout history, but especially in the 20th century by developing countries with dual labour markets. Newly independent developing countries with dual labour markets adapted the strategy of import substitution industrialization (lSI), with an emphasis on protecting infant industries and promoting pro-labour policies. In the post-colonial period the international demand for lowskilled workers rose, particularly in the North (developed countries), and in mineral rich countries including the oil exporters and South Africa, and the newly industrialising countries in East Asia. International labour migration to these countries was adapted as an integral development tool by the governments of the lSI countries. Most migrants were low-skilled and temporary workers in the destination countries. Although no multilateral institutional framework existed, usually both the sending and receiving countries adapted unilateral and bilateral migration policies to guarantee the gains from migration. Workers were thus "protected" to varying degrees under such agreements. From the 1970s, the North experienced a slowdown in the growth in demand for unskilled workers. In the 1980s, many lSI countries experienced devastating economic crises that forced them to abandon the lSI policy and adapt the export-led industrialisation (EOI) policy with an emphasis on trade liberalization. The switch from lSI to EOI in developing countries with dual labour markets led to the downsizing of public sector employment, the removal of marketing boards formally used by small-scale agricultural farmers, and the expansion of export processing zones (EPZs). These outcomes resulted in a rise in push internal migration, and international migration from these countries especially to other developing countries. At the same time, since the late 1980s, capital has acquired greatly enhanced mobility at the global level. The adaptation of EOI and the full mobility of capital at the global level altered the institutional structure within which labour migration was governed both nationally, and internationally. At the national level stricter unilateral policies were reinforced by receiving countries for low-skilled labour, while less strict policies applied for skilled labour. These remain in operation in conjunction with the earlier bilateral agreements. At the international level, there remains a lack of policy to regulate international labour migration. Under the current enhanced mobility of capital, international migrants are thus left vulnerable. Lesotho fits this pattern. Faced with a dual economy and an abundance of semi-skilled labour, Lesotho has been a principal supplier of labour to the South Africa's mining industry since its independence. Lesotho's industrial diversification thus mirrors South Africa's industrial diversification. In the lSI phase (1968 - 1987), international labour migration became the most important tool of economic welfare generation in Lesotho. Bilateral agreements were signed in the early 1970s between Lesotho and South Africa to guarantee the gains from migration. Since the late I980s, the mining industry in South Africa began to downsize production and employment. Fewer novice miners from Lesotho were recruited to work in South Africa. The adaptation of the EOI policy in Lesotho in 1987 introduced EPZ industrialization and trade liberalization. Nevertheless, the retrenchment of mine workers from South Africa is occurring at a time when Lesotho is experiencing an employment crisis. The political independence of South Africa in 1994 was accompanied by stricter international migration policies by the new democratic government of South Africa. Most migrant workers in South Africa are thus now faced with a two-door policy (of the earlier bilateral agreements and the amendments to the Aliens Control Act). This system has left migrant workers vulnerable to exploitation by both employers and the law (police) in South Africa. Nevertheless, international migration from Lesotho to South Africa continues to expand, particularly of the new type of migration - semiskilled female workers in the services sector. At the same time, South Africa is also experiencing an employment crisis. The most important policy implications are, firstly, that migration is subject to the same "casualisation" as other work, with the effects made worse by the "statelessness" of migrants, who are most vulnerable to exploitation. Secondly, multilateralism is needed (e.g., SADC) and holistic, multilateral policies are required. It is clear that under the new global division of labour ad hoc policy towards international labour migration is ineffective.
- Full Text:
- Date Issued: 2002
A preliminary investigation into the patterns of performance on a computerized adaptive test battery implications for admissions and placement
- Authors: Vorster, Marlene
- Date: 2002
- Subjects: Universities and colleges -- Admission , Advanced placement programs (Education) , Computer adaptive testing , Universities and colleges -- Entrance requirements
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:11030 , http://hdl.handle.net/10948/285 , Universities and colleges -- Admission , Advanced placement programs (Education) , Computer adaptive testing , Universities and colleges -- Entrance requirements
- Description: The fallibility of human judgment in the making of decisions requires the use of tests to enhance decision-making processes. Although testing is surrounded with issues of bias and fairness, it remains the best means of facilitating decisions over more subjective alternatives. As a country in transition, all facets of South African society are being transformed. The changes taking place within the tertiary education system to redress the legacy of Apartheid, coincide with an international trend of transforming higher education. One important area that is being transformed relates to university entrance requirements and admissions procedures. In South Africa, these were traditionally based on matriculation performance, which has been found to be a more variable predictor of academic success for historically disadvantaged students. Alternative or revised admissions procedures have been implemented at universities throughout the country, in conjunction with academic development programmes. However, it is argued in this dissertation that a paradigm shift is necessary to conceptualise admissions and placement assessment in a developmentally oriented way. Furthermore, it is motivated that it is important to keep abreast of advances in theory, such as item response theory (IRT) and technology, such as computerized adaptive testing (CAT), in test development to enhance the effectiveness of selecting and placing learners in tertiary programmes. This study focuses on investigating the use of the Accuplacer Computerized Placement Tests (CPTs), an adaptive test battery that was developed in the USA, to facilitate unbiased and fair admissions, placement and development decisions in the transforming South African context. The battery has been implemented at a university in the Eastern Cape and its usefulness was investigated for 193 participants, divided into two groups of degree programmes, depending on whether or not admission to the degree required mathematics as a matriculation subject. Mathematics based degree programme learners (n = 125) wrote three and non-mathematics based degree programme learners (n = 68) wrote two tests of the Accuplacer test battery. Correlations were computed between the Accuplacer scores and matriculation performance, and between the Accuplacer scores, matriculation performance and academic results. All yielded significant positive relationships excepting for the one subtest of the Accuplacer with academic performance for the non-mathematics based degree group. Multiple correlations for both groups indicated that the Accuplacer scores and matriculation results contribute unique information about academic performance. Cluster analysis for both groups yielded three underlying patterns of performance in the data sets. An attempt was made to validate the cluster groups internally through a MANOVA and single-factor ANOVAs. It was found that Accuplacer subtests and matriculation results do discriminate to an extent among clusters of learners in both groups of degree programmes investigated. Clusters were described in terms of demographic information and it was determined that the factors of culture and home language and how they relate to cluster group membership need further investigation. The main suggestion flowing from these findings is that an attempt be made to confirm the results with a larger sample size and for different cultural and language groups.
- Full Text:
- Date Issued: 2002
- Authors: Vorster, Marlene
- Date: 2002
- Subjects: Universities and colleges -- Admission , Advanced placement programs (Education) , Computer adaptive testing , Universities and colleges -- Entrance requirements
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:11030 , http://hdl.handle.net/10948/285 , Universities and colleges -- Admission , Advanced placement programs (Education) , Computer adaptive testing , Universities and colleges -- Entrance requirements
- Description: The fallibility of human judgment in the making of decisions requires the use of tests to enhance decision-making processes. Although testing is surrounded with issues of bias and fairness, it remains the best means of facilitating decisions over more subjective alternatives. As a country in transition, all facets of South African society are being transformed. The changes taking place within the tertiary education system to redress the legacy of Apartheid, coincide with an international trend of transforming higher education. One important area that is being transformed relates to university entrance requirements and admissions procedures. In South Africa, these were traditionally based on matriculation performance, which has been found to be a more variable predictor of academic success for historically disadvantaged students. Alternative or revised admissions procedures have been implemented at universities throughout the country, in conjunction with academic development programmes. However, it is argued in this dissertation that a paradigm shift is necessary to conceptualise admissions and placement assessment in a developmentally oriented way. Furthermore, it is motivated that it is important to keep abreast of advances in theory, such as item response theory (IRT) and technology, such as computerized adaptive testing (CAT), in test development to enhance the effectiveness of selecting and placing learners in tertiary programmes. This study focuses on investigating the use of the Accuplacer Computerized Placement Tests (CPTs), an adaptive test battery that was developed in the USA, to facilitate unbiased and fair admissions, placement and development decisions in the transforming South African context. The battery has been implemented at a university in the Eastern Cape and its usefulness was investigated for 193 participants, divided into two groups of degree programmes, depending on whether or not admission to the degree required mathematics as a matriculation subject. Mathematics based degree programme learners (n = 125) wrote three and non-mathematics based degree programme learners (n = 68) wrote two tests of the Accuplacer test battery. Correlations were computed between the Accuplacer scores and matriculation performance, and between the Accuplacer scores, matriculation performance and academic results. All yielded significant positive relationships excepting for the one subtest of the Accuplacer with academic performance for the non-mathematics based degree group. Multiple correlations for both groups indicated that the Accuplacer scores and matriculation results contribute unique information about academic performance. Cluster analysis for both groups yielded three underlying patterns of performance in the data sets. An attempt was made to validate the cluster groups internally through a MANOVA and single-factor ANOVAs. It was found that Accuplacer subtests and matriculation results do discriminate to an extent among clusters of learners in both groups of degree programmes investigated. Clusters were described in terms of demographic information and it was determined that the factors of culture and home language and how they relate to cluster group membership need further investigation. The main suggestion flowing from these findings is that an attempt be made to confirm the results with a larger sample size and for different cultural and language groups.
- Full Text:
- Date Issued: 2002
The independent high rate algal pond as a unit operation in tertiary wastewater treatment
- Authors: Clark, Stewart James
- Date: 2002
- Subjects: Algae -- Biotechnology , Sewage -- Purification -- Biological treatment
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4092 , http://hdl.handle.net/10962/d1007805
- Description: The development of the High Rate Algal Pond (HRAP) as an independent tertiary treatment unit operation for phosphate and nitrate removal is reported. A novel Integrated Algal Ponding System (lAPS) design is proposed for nutrient removal from the effluents of both a conventional domestic sewage treatment plant and from an Advanced Integrated Wastewater Ponding System (AIWPS). The viability of an independently operated HRAP has been identified and termed the Independent High Rate Algal Pond (l-HRAP). A 500 m² pilot 1- HRAP was operated in such a way as to facilitate the precipitation of calcium phosphate, known to be controlled by pH (greater than 9.4) and resulting in final phosphate levels of less than 1 mg.L⁻¹ as P0₄-P. The incorporation of the I-HRAP into a denitrification process was also investigated. Continuously fed column reactors, utilising algal biomass as a carbon source, showed that the heterotrophic bacterial community dominant in the anaerobic algal sludge were denitrifying the nitrate in the feed. It was demonstrated that as the cultures were stressed (using increased nitrate concentrations, anaerobiosis and light starvation) total polysaccharide (TPS) concentrations increased, with a notable increase 111 the exopolysaccharide (EPS) fraction. These experiments corroborated the hypothesis that harvested microalgal biomass can be manipulated to produce, and release, exopolymeric substances under stress conditions, and which may serve as carbon source for denitrification. In both batch flask studies and in laboratory-scale reactor systems, harvested microalgal biomass from an HRAP was shown to produce exopolymeric substances under stress conditions. Initial high loading-rates of greater than 20 mg.L⁻¹ NO₃-N resulted in double the amount of exopolysaccharide production than in flasks with initial low loading-rates (less than 5 mg.L⁻¹ NO₃-N). Making use of an upflow anaerobic sludge blanket-type degrading-bed reactor, and an anaerobic, flooded trickle filter (ANTRIC) receiving HRAP effluent, the relationship between denitrification and the changes in polysaccharide content was investigated. This phenomenon has considerable beneficial implications in biological wastewater treatment systems where high nitrate concentration in the final effluent is a potential mitigating factor. Identification of the heterotrophic bacteria active in the denitrification process was attempted. This study presents a first report on the development and operation of the I-HRAP and has been followed by a technical-scale pilot plant evaluation of the process in the tertiary treatment of domestic wastewaters.
- Full Text:
- Date Issued: 2002
- Authors: Clark, Stewart James
- Date: 2002
- Subjects: Algae -- Biotechnology , Sewage -- Purification -- Biological treatment
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4092 , http://hdl.handle.net/10962/d1007805
- Description: The development of the High Rate Algal Pond (HRAP) as an independent tertiary treatment unit operation for phosphate and nitrate removal is reported. A novel Integrated Algal Ponding System (lAPS) design is proposed for nutrient removal from the effluents of both a conventional domestic sewage treatment plant and from an Advanced Integrated Wastewater Ponding System (AIWPS). The viability of an independently operated HRAP has been identified and termed the Independent High Rate Algal Pond (l-HRAP). A 500 m² pilot 1- HRAP was operated in such a way as to facilitate the precipitation of calcium phosphate, known to be controlled by pH (greater than 9.4) and resulting in final phosphate levels of less than 1 mg.L⁻¹ as P0₄-P. The incorporation of the I-HRAP into a denitrification process was also investigated. Continuously fed column reactors, utilising algal biomass as a carbon source, showed that the heterotrophic bacterial community dominant in the anaerobic algal sludge were denitrifying the nitrate in the feed. It was demonstrated that as the cultures were stressed (using increased nitrate concentrations, anaerobiosis and light starvation) total polysaccharide (TPS) concentrations increased, with a notable increase 111 the exopolysaccharide (EPS) fraction. These experiments corroborated the hypothesis that harvested microalgal biomass can be manipulated to produce, and release, exopolymeric substances under stress conditions, and which may serve as carbon source for denitrification. In both batch flask studies and in laboratory-scale reactor systems, harvested microalgal biomass from an HRAP was shown to produce exopolymeric substances under stress conditions. Initial high loading-rates of greater than 20 mg.L⁻¹ NO₃-N resulted in double the amount of exopolysaccharide production than in flasks with initial low loading-rates (less than 5 mg.L⁻¹ NO₃-N). Making use of an upflow anaerobic sludge blanket-type degrading-bed reactor, and an anaerobic, flooded trickle filter (ANTRIC) receiving HRAP effluent, the relationship between denitrification and the changes in polysaccharide content was investigated. This phenomenon has considerable beneficial implications in biological wastewater treatment systems where high nitrate concentration in the final effluent is a potential mitigating factor. Identification of the heterotrophic bacteria active in the denitrification process was attempted. This study presents a first report on the development and operation of the I-HRAP and has been followed by a technical-scale pilot plant evaluation of the process in the tertiary treatment of domestic wastewaters.
- Full Text:
- Date Issued: 2002
Alkane oxidation using metallophthalocyanine as homogeneous catalysts
- Authors: Grootboom, Natasha Denise
- Date: 2002
- Subjects: Oxidation , Alkanes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4449 , http://hdl.handle.net/10962/d1007794
- Description: Iron polychlorophthalocyanine (FePc(Cl)₁₆) and tetrasulfophthalocyanine ([M¹¹TSPc]⁴) complexes of iron, cobalt and manganese are employed as catalysts for the oxidation of cyclohexane using tert-butyl hydroperoxide (TBHP), chloroperoxybenzoic acid (CPBA) and hydrogen peroxide as oxidants. Catalysis using the FePc(Cl)₁₆ was performed in a dimethylformamide:dichloromethane (3 :7) solvent mixture. For the [Fe¹¹TSPc]⁴⁻, [Co¹¹TSPc]⁻ and [Mn¹¹TSPc]⁴⁻catalysts, a water:methanol (1:9) mixture was employed. The products of the catalysis are cyclohexanone, cyclohexanol and cyclohexanediol. The relative percentage yields, percentage selectivity and overall percentage conversion of the products depended on types of oxidant, or catalyst, concentrations of substrate or catalysts and temperature. TBHP was found to be the best oxidant since minimal destruction of the catalyst and higher selectivity in the products were observed when this oxidant was employed. Of the four catalysts investigated [Fe¹¹TSPc]⁴⁻ yielded the highest overall percentage conversion of 20%.The mechanism of the oxidation of cyclohexane in the presence of the FePc(Cl)₁₆ and [M¹¹TSPc]⁴⁻ involves the oxidation of these catalysts, forming an Fe(IlI) phthalocyanine species as an intermediate. Electrocatalysis using [Co¹¹TSPc]⁴⁻ as catalyst, employed an aqueous pH 7 buffer medium for electro-oxidation of 4-pentenoic acid. An enone is suggested as the only oxidation product of 4-pentenoic acid. No degradation of [Co¹¹TSPc]⁴⁻ was observed during the electrocatalytic process. In this process water was used as a source of oxygen therefore eliminating the production of by products from oxidant as in the case of TBHP and CPBA. This system was studied In an attempt to set up conditions for alkane electrocatalytic oxidation.
- Full Text:
- Date Issued: 2002
- Authors: Grootboom, Natasha Denise
- Date: 2002
- Subjects: Oxidation , Alkanes
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4449 , http://hdl.handle.net/10962/d1007794
- Description: Iron polychlorophthalocyanine (FePc(Cl)₁₆) and tetrasulfophthalocyanine ([M¹¹TSPc]⁴) complexes of iron, cobalt and manganese are employed as catalysts for the oxidation of cyclohexane using tert-butyl hydroperoxide (TBHP), chloroperoxybenzoic acid (CPBA) and hydrogen peroxide as oxidants. Catalysis using the FePc(Cl)₁₆ was performed in a dimethylformamide:dichloromethane (3 :7) solvent mixture. For the [Fe¹¹TSPc]⁴⁻, [Co¹¹TSPc]⁻ and [Mn¹¹TSPc]⁴⁻catalysts, a water:methanol (1:9) mixture was employed. The products of the catalysis are cyclohexanone, cyclohexanol and cyclohexanediol. The relative percentage yields, percentage selectivity and overall percentage conversion of the products depended on types of oxidant, or catalyst, concentrations of substrate or catalysts and temperature. TBHP was found to be the best oxidant since minimal destruction of the catalyst and higher selectivity in the products were observed when this oxidant was employed. Of the four catalysts investigated [Fe¹¹TSPc]⁴⁻ yielded the highest overall percentage conversion of 20%.The mechanism of the oxidation of cyclohexane in the presence of the FePc(Cl)₁₆ and [M¹¹TSPc]⁴⁻ involves the oxidation of these catalysts, forming an Fe(IlI) phthalocyanine species as an intermediate. Electrocatalysis using [Co¹¹TSPc]⁴⁻ as catalyst, employed an aqueous pH 7 buffer medium for electro-oxidation of 4-pentenoic acid. An enone is suggested as the only oxidation product of 4-pentenoic acid. No degradation of [Co¹¹TSPc]⁴⁻ was observed during the electrocatalytic process. In this process water was used as a source of oxygen therefore eliminating the production of by products from oxidant as in the case of TBHP and CPBA. This system was studied In an attempt to set up conditions for alkane electrocatalytic oxidation.
- Full Text:
- Date Issued: 2002
The effect of selenium in the detoxification of the microcystin hepatotoxins
- Authors: Downs, Kerry
- Date: 2002
- Subjects: Cynaobacterial toxins , Microcystins , Selenium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11070 , http://hdl.handle.net/10948/284 , Cynaobacterial toxins , Microcystins , Selenium
- Description: Blooms of cyanobacteria have been known to cause illness in humans and death in wild and domestic animals. One of the toxins produced by cyanobacteria is microcystin, which is a potent hepatotoxin. Microcystin is taken up by bile acid transporters in the intestine and transported into the liver. After exposure to acute doses of microcystin, severe haemorrhage has been observed along with apoptotic and necrotic hepatocytes. The cytoskeletal structure of the hepatocytes is disrupted and oxidative stress is induced. Selenium, a known anti-oxidant, has been shown to induce increased activity of glutathione peroxidase. Glutathione peroxidase removes peroxides from cells protecting them from oxidative stress. This study set out to determine if selenium could play a role in preventing the damage to mice livers due to microcystin toxin. The protective role of selenium was explored in three main studies: in the first study, the ability of selenium to increase the survival time of mice exposed to a lethal dose of toxin was determined. In the second study the mice were exposed to sublethal chronic doses of toxin over 30 days. The ability of selenium to minimise liver damage under these conditions was determined. The final study investigated the mechanism of the protective effect of selenium. The results of the first study suggested that selenium could extend survival time. In the second study the selenium supplemented mice showed a reduction in the extent of the increase in liver weight and a decrease in the amount of lipid peroxidation induced compared to the mice that received only toxin. The histology of the selenium supplemented mice also showed a decrease in the severity and amount of morphological changes in the liver. The third study indicated that the protection shown by selenium might be mediated by an increase in the glutathione peroxidase (GPX) activity in selenium supplemented mice. This increase in GPX activity would increase the removal of the lipid hydroperoxides and prevent the damage they would cause in the cell. A further result indicated an increase in glutathione S-transferase in only the toxin control mice when compared to the selenium supplemented and control mice. ii In conclusion selenium offers protection against microcystin but further studies need to be done to provide statistically valid results to clarify the level of protection.
- Full Text:
- Date Issued: 2002
- Authors: Downs, Kerry
- Date: 2002
- Subjects: Cynaobacterial toxins , Microcystins , Selenium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11070 , http://hdl.handle.net/10948/284 , Cynaobacterial toxins , Microcystins , Selenium
- Description: Blooms of cyanobacteria have been known to cause illness in humans and death in wild and domestic animals. One of the toxins produced by cyanobacteria is microcystin, which is a potent hepatotoxin. Microcystin is taken up by bile acid transporters in the intestine and transported into the liver. After exposure to acute doses of microcystin, severe haemorrhage has been observed along with apoptotic and necrotic hepatocytes. The cytoskeletal structure of the hepatocytes is disrupted and oxidative stress is induced. Selenium, a known anti-oxidant, has been shown to induce increased activity of glutathione peroxidase. Glutathione peroxidase removes peroxides from cells protecting them from oxidative stress. This study set out to determine if selenium could play a role in preventing the damage to mice livers due to microcystin toxin. The protective role of selenium was explored in three main studies: in the first study, the ability of selenium to increase the survival time of mice exposed to a lethal dose of toxin was determined. In the second study the mice were exposed to sublethal chronic doses of toxin over 30 days. The ability of selenium to minimise liver damage under these conditions was determined. The final study investigated the mechanism of the protective effect of selenium. The results of the first study suggested that selenium could extend survival time. In the second study the selenium supplemented mice showed a reduction in the extent of the increase in liver weight and a decrease in the amount of lipid peroxidation induced compared to the mice that received only toxin. The histology of the selenium supplemented mice also showed a decrease in the severity and amount of morphological changes in the liver. The third study indicated that the protection shown by selenium might be mediated by an increase in the glutathione peroxidase (GPX) activity in selenium supplemented mice. This increase in GPX activity would increase the removal of the lipid hydroperoxides and prevent the damage they would cause in the cell. A further result indicated an increase in glutathione S-transferase in only the toxin control mice when compared to the selenium supplemented and control mice. ii In conclusion selenium offers protection against microcystin but further studies need to be done to provide statistically valid results to clarify the level of protection.
- Full Text:
- Date Issued: 2002
"The wife of Lucifer" : women and evil in Charles Dickens
- Authors: Ebelthite, Candice Axell
- Date: 2002
- Subjects: Dickens, Charles, 1812-1870 -- Characters -- Women Evil in literature Women in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2189 , http://hdl.handle.net/10962/d1002231
- Description: This thesis examines Dickens's presentation of evil women. In the course of my reading I discovered that most of the evil women in his novels are mothers, or mother-figures, a finding which altered the nature of my interpretation and led to closer examination of these characters, rather than the prostitutes and criminals who may have been viewed negatively by Nineteenth century society and thereby condemned as evil. Among the many unsympathetically portrayed mothers and mother-figures in Dickens's works, the three that are most interesting are Lady Dedlock, Miss Havisham, and Mrs Skewton. Madame Defarge initiates the discussion, however, as a seminal figure among the many evil women in the novels. Psychoanalytical and socio-historic readings grounded in Nineteenth century conceptions of womanhood provide background material for this thesis. Though useful and informative, however, these areas of study are not sufficient in themselves. The theory that shapes the arguments of this thesis is defined by Steven Cohan, who argues strongly that the demand for psychological coherence as a requisite of character obscures the imaginative power of character as textual construct, and who both refutes and develops character theory as it is argued by Baruch Hochman. Cohan's theory is also finally closer to that outlined by Thomas Docherty, who provides a complex reading of character as ultimately "unknowable".
- Full Text:
- Date Issued: 2002
- Authors: Ebelthite, Candice Axell
- Date: 2002
- Subjects: Dickens, Charles, 1812-1870 -- Characters -- Women Evil in literature Women in literature
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2189 , http://hdl.handle.net/10962/d1002231
- Description: This thesis examines Dickens's presentation of evil women. In the course of my reading I discovered that most of the evil women in his novels are mothers, or mother-figures, a finding which altered the nature of my interpretation and led to closer examination of these characters, rather than the prostitutes and criminals who may have been viewed negatively by Nineteenth century society and thereby condemned as evil. Among the many unsympathetically portrayed mothers and mother-figures in Dickens's works, the three that are most interesting are Lady Dedlock, Miss Havisham, and Mrs Skewton. Madame Defarge initiates the discussion, however, as a seminal figure among the many evil women in the novels. Psychoanalytical and socio-historic readings grounded in Nineteenth century conceptions of womanhood provide background material for this thesis. Though useful and informative, however, these areas of study are not sufficient in themselves. The theory that shapes the arguments of this thesis is defined by Steven Cohan, who argues strongly that the demand for psychological coherence as a requisite of character obscures the imaginative power of character as textual construct, and who both refutes and develops character theory as it is argued by Baruch Hochman. Cohan's theory is also finally closer to that outlined by Thomas Docherty, who provides a complex reading of character as ultimately "unknowable".
- Full Text:
- Date Issued: 2002
The determination of a strategy for the implementation of learnerships in the catalytic converter canning industry in the Eastern Cape
- Authors: Heather, Keith Buxmann
- Date: 2002
- Subjects: Automobiles -- Catalytic converters , Automobile industry and trade -- South Africa -- Eastern Cape , Apprenticeship programs -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10851 , http://hdl.handle.net/10948/117 , Automobiles -- Catalytic converters , Automobile industry and trade -- South Africa -- Eastern Cape , Apprenticeship programs -- South Africa -- Eastern Cape
- Description: The Eastern Cape Region, once had sufficient job seekers with automotive component manufacturing skills and experience. Indications are that this pool has been desiccated. The draining of skills out of the area is starting to affect growth potential and competitiveness in the industry in the area. In 1998, the Skills Development Act was passed to implement the National Skills Development Plan, and to encourage employers to train personnel. The strategy promotes a three faceted approach to encourage the development of skills; Workplace Skills Development Plans, Learnerships and Sector Specific Initiatives. This study will focus on the implementation of learnerships in the Catalytic Converter Canning Industry. The aim of this research is to verify the skills shortages; identify which skills are required by the Catalytic Converter Canning Industry in the Eastern Cape and propose a strategy of addressing these needs by means of learnerships. By studying the Legislation supporting the National Skills Development Plan, conducting a literature study, and interviewing knowledgeable people in the industry, the skills requirements of the industry were identified. Thereafter, a questionnaire was drawn up and completed together with representatives from Eberspächer South Africa, Faurecia Exhaust Systems South Africa, Precision Exhaust Systems and Tenneco Automotive South Africa, the active manufacturers of catalytic converters, for OEM’s worldwide, who are based in the Eastern Cape Region. The empirical study confirmed the findings of the research and skills deficiencies were identified. In conclusion, a strategy is proposed whereby the Catalytic Converter Canning Industry could address the skills shortage by the implementation and development of learnerships.
- Full Text:
- Date Issued: 2002
- Authors: Heather, Keith Buxmann
- Date: 2002
- Subjects: Automobiles -- Catalytic converters , Automobile industry and trade -- South Africa -- Eastern Cape , Apprenticeship programs -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10851 , http://hdl.handle.net/10948/117 , Automobiles -- Catalytic converters , Automobile industry and trade -- South Africa -- Eastern Cape , Apprenticeship programs -- South Africa -- Eastern Cape
- Description: The Eastern Cape Region, once had sufficient job seekers with automotive component manufacturing skills and experience. Indications are that this pool has been desiccated. The draining of skills out of the area is starting to affect growth potential and competitiveness in the industry in the area. In 1998, the Skills Development Act was passed to implement the National Skills Development Plan, and to encourage employers to train personnel. The strategy promotes a three faceted approach to encourage the development of skills; Workplace Skills Development Plans, Learnerships and Sector Specific Initiatives. This study will focus on the implementation of learnerships in the Catalytic Converter Canning Industry. The aim of this research is to verify the skills shortages; identify which skills are required by the Catalytic Converter Canning Industry in the Eastern Cape and propose a strategy of addressing these needs by means of learnerships. By studying the Legislation supporting the National Skills Development Plan, conducting a literature study, and interviewing knowledgeable people in the industry, the skills requirements of the industry were identified. Thereafter, a questionnaire was drawn up and completed together with representatives from Eberspächer South Africa, Faurecia Exhaust Systems South Africa, Precision Exhaust Systems and Tenneco Automotive South Africa, the active manufacturers of catalytic converters, for OEM’s worldwide, who are based in the Eastern Cape Region. The empirical study confirmed the findings of the research and skills deficiencies were identified. In conclusion, a strategy is proposed whereby the Catalytic Converter Canning Industry could address the skills shortage by the implementation and development of learnerships.
- Full Text:
- Date Issued: 2002
A multivariate model of the offence behaviours of South African serial killers
- Authors: Hodgskiss, Brin Allan
- Date: 2013-05-14
- Subjects: Serial murderers -- South Africa -- Psychology Criminal behavior
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3169 , http://hdl.handle.net/10962/d1007793
- Description: It was hypothesised that there would be behavioural consistencies in the offences of South African serial killers. The themes underlying these observable differences can help us understand the nature of these offences. Crime scene data was ohtained from police records, and structured, in-depth offender interviews. 73 offences, committed by 13 offenders, were analysed. The analysis used Smallest Space Analysis (SSA), a Multidimensional scaling (MDS) procedure. This analysis revealed systematic patterns of behaviour in the offences. It was found that the focus of these offences is an impersonal, hostile, and act-focused murder were the victim is treated as a depersonalised object. Empirical support for an underlying thematic structure to these offences was also provided. The offence themes identified relate to the nature of the actions committed during the offence, and the function these actions had for the offender. These fmdings thus support the hypothesis that these offences will display meaningful behavioural variation. These findings have direct utility in the investigation and study of serial killing in South Aflica. They also provide the basis for comparison with previously suggested typologies of serial killing, and indicate directions for future research into this phenomenon in the South African setting. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Authors: Hodgskiss, Brin Allan
- Date: 2013-05-14
- Subjects: Serial murderers -- South Africa -- Psychology Criminal behavior
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3169 , http://hdl.handle.net/10962/d1007793
- Description: It was hypothesised that there would be behavioural consistencies in the offences of South African serial killers. The themes underlying these observable differences can help us understand the nature of these offences. Crime scene data was ohtained from police records, and structured, in-depth offender interviews. 73 offences, committed by 13 offenders, were analysed. The analysis used Smallest Space Analysis (SSA), a Multidimensional scaling (MDS) procedure. This analysis revealed systematic patterns of behaviour in the offences. It was found that the focus of these offences is an impersonal, hostile, and act-focused murder were the victim is treated as a depersonalised object. Empirical support for an underlying thematic structure to these offences was also provided. The offence themes identified relate to the nature of the actions committed during the offence, and the function these actions had for the offender. These fmdings thus support the hypothesis that these offences will display meaningful behavioural variation. These findings have direct utility in the investigation and study of serial killing in South Aflica. They also provide the basis for comparison with previously suggested typologies of serial killing, and indicate directions for future research into this phenomenon in the South African setting. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
The adaptation of the Clark (1997) treatment for social phobia into a group therapy format, and a preliminary evaluation
- Authors: Kannan, Swetha
- Date: 2002
- Subjects: Social phobia -- Treatment , Group psychotherapy
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3109 , http://hdl.handle.net/10962/d1004547 , Social phobia -- Treatment , Group psychotherapy
- Description: Clark and Wells (1995) constructed a comprehensive cognitive model of social phobic behaviour, in terms of which social phobic behaviour is activated and maintained by a system consisting of negative thoughts and beliefs, anxiety s)mptoms, avoidance and safety behaviours, and processing of self as a social object. The interaction of these elements creates a series of vicious circles which escalate and which keep the phobic individual in a state of chronic -disability, either because they chronically avoid significant social situations or because they find themselves incapacitated by anxiety when they enter them. The Clark and Wells (1995) treatment programme is designed to alleviate the social phobia by targeting the components that form the vicious maintenance cycle and replacing these by new patterns of cognition and behaviour. This treatment programme was designed for individual treatment, and the present study adapted it to a group format. Seven social phobic university students participated in the adapted group treatment format over the course of 13, 2-hour group sessions. Regular assessment of participants' response to the programme was carried out weekly and at two follow-up assessments, with the use of a series of questionnaires. In addition, sessions were audio taped and videotaped, facilitators took notes during sessions and keep records made by participants of their homework exercises. Individual case studies were written for all participants (including two non-completers) in which case narratives were juxtaposed against their responses to each of the self-report questionnaires. These we used as a basis for evaluating the validity of the Clark and Wells theoretical model and in examining the effectiveness of the treatment programme in bringing to awareness and interrupting the cycles that maintained the phobic behaviour. It is concluded that the group programme showed evidence of being very effective and, a group treatment manual was constructed so that it can be employed clinically and in future research.
- Full Text:
- Date Issued: 2002
- Authors: Kannan, Swetha
- Date: 2002
- Subjects: Social phobia -- Treatment , Group psychotherapy
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3109 , http://hdl.handle.net/10962/d1004547 , Social phobia -- Treatment , Group psychotherapy
- Description: Clark and Wells (1995) constructed a comprehensive cognitive model of social phobic behaviour, in terms of which social phobic behaviour is activated and maintained by a system consisting of negative thoughts and beliefs, anxiety s)mptoms, avoidance and safety behaviours, and processing of self as a social object. The interaction of these elements creates a series of vicious circles which escalate and which keep the phobic individual in a state of chronic -disability, either because they chronically avoid significant social situations or because they find themselves incapacitated by anxiety when they enter them. The Clark and Wells (1995) treatment programme is designed to alleviate the social phobia by targeting the components that form the vicious maintenance cycle and replacing these by new patterns of cognition and behaviour. This treatment programme was designed for individual treatment, and the present study adapted it to a group format. Seven social phobic university students participated in the adapted group treatment format over the course of 13, 2-hour group sessions. Regular assessment of participants' response to the programme was carried out weekly and at two follow-up assessments, with the use of a series of questionnaires. In addition, sessions were audio taped and videotaped, facilitators took notes during sessions and keep records made by participants of their homework exercises. Individual case studies were written for all participants (including two non-completers) in which case narratives were juxtaposed against their responses to each of the self-report questionnaires. These we used as a basis for evaluating the validity of the Clark and Wells theoretical model and in examining the effectiveness of the treatment programme in bringing to awareness and interrupting the cycles that maintained the phobic behaviour. It is concluded that the group programme showed evidence of being very effective and, a group treatment manual was constructed so that it can be employed clinically and in future research.
- Full Text:
- Date Issued: 2002
Design, evaluation and comparison of evolution and reinforcement learning models
- Authors: Mclean, Clinton Brett
- Date: 2002
- Subjects: Evolutionary computation Neural networks (Computer science) Reinforcement learning
- Language: English
- Type: Thesis , Masters , MEcon
- Identifier: vital:4625 , http://hdl.handle.net/10962/d1006493
- Description: This work presents the design, evaluation and comparison of evolution and reinforcement learning models, in isolation and combined in Darwinian and Lamarckian frameworks, with a particular emphasis being placed on their adaptive nature in response to environments that become increasingly unstable. Our ultimate objective is to determine whether hybrid models of evolution and learning can demonstrate adaptive qualities beyond those of such models when applied in isolation. This work demonstrates the limitations of evolution, reinforcement learning and Lamarckian models in dealing with increasingly unstable environments, while noting the effective adaptive nature of a Darwinian model to assimilate increasing levels of instability. This is shown to be a result of the Darwinian evolution model's ability to separate learning at two levels, the population's experience of the environment over the course of many generations and the individual's experience of the environment over the course of its lifetime. Thus, knowledge relating to the general characteristics of the environment over many generations can be maintained in the population's genotypes with phenotype (reinforcement) learning being utilized to adapt a particular agent to the particular characteristics of its environment. Lamarckian evolution, though, is shown to demonstrate adaptive characteristics that are highly effective in response to the stable environments. Selection and reproduction combined with reinforcement learning creates a model that has the ability to utilize useful knowledge produced by reinforcements, as opposed to random mutations, to accelerate the search process. As a result the influence of individual learning on the populations evolution is shown to be more successful when applied in the more direct Lamarckian form. Based on our results demonstrating the success of Lamarckian strategies in stable environments and Darwinian strategies in unstable environments, hybrid Darwinian/Lamarckian models are created with a view towards combining the advantages of both forms of evolution to produce a superior adaptive capability. Our investigation demonstrates that such hybrid models can effectively combine the adaptive advantageous of both Darwinian and Lamarckian evolution to provide a more effective capability of adapting to a range of conditions, from stable to unstable, appropriately adjusting the required degree of inheritance in response to the requirements of the environment.
- Full Text:
- Date Issued: 2002
- Authors: Mclean, Clinton Brett
- Date: 2002
- Subjects: Evolutionary computation Neural networks (Computer science) Reinforcement learning
- Language: English
- Type: Thesis , Masters , MEcon
- Identifier: vital:4625 , http://hdl.handle.net/10962/d1006493
- Description: This work presents the design, evaluation and comparison of evolution and reinforcement learning models, in isolation and combined in Darwinian and Lamarckian frameworks, with a particular emphasis being placed on their adaptive nature in response to environments that become increasingly unstable. Our ultimate objective is to determine whether hybrid models of evolution and learning can demonstrate adaptive qualities beyond those of such models when applied in isolation. This work demonstrates the limitations of evolution, reinforcement learning and Lamarckian models in dealing with increasingly unstable environments, while noting the effective adaptive nature of a Darwinian model to assimilate increasing levels of instability. This is shown to be a result of the Darwinian evolution model's ability to separate learning at two levels, the population's experience of the environment over the course of many generations and the individual's experience of the environment over the course of its lifetime. Thus, knowledge relating to the general characteristics of the environment over many generations can be maintained in the population's genotypes with phenotype (reinforcement) learning being utilized to adapt a particular agent to the particular characteristics of its environment. Lamarckian evolution, though, is shown to demonstrate adaptive characteristics that are highly effective in response to the stable environments. Selection and reproduction combined with reinforcement learning creates a model that has the ability to utilize useful knowledge produced by reinforcements, as opposed to random mutations, to accelerate the search process. As a result the influence of individual learning on the populations evolution is shown to be more successful when applied in the more direct Lamarckian form. Based on our results demonstrating the success of Lamarckian strategies in stable environments and Darwinian strategies in unstable environments, hybrid Darwinian/Lamarckian models are created with a view towards combining the advantages of both forms of evolution to produce a superior adaptive capability. Our investigation demonstrates that such hybrid models can effectively combine the adaptive advantageous of both Darwinian and Lamarckian evolution to provide a more effective capability of adapting to a range of conditions, from stable to unstable, appropriately adjusting the required degree of inheritance in response to the requirements of the environment.
- Full Text:
- Date Issued: 2002
The evolution of online news: a comparative case study of the process of implementation at two South African news organisations
- Authors: Knight, Margaret Anne
- Date: 2002
- Subjects: Electronic newspapers -- South Africa , Electronic newspapers -- United States , Electronic news gathering -- South Africa , Electronic news gathering -- United States
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3447 , http://hdl.handle.net/10962/d1002901 , Electronic newspapers -- South Africa , Electronic newspapers -- United States , Electronic news gathering -- South Africa , Electronic news gathering -- United States
- Description: This study examines the evolution of online news strategy in South African and American newspaper companies, and compares the approaches used in the two countries. The Internet has had a major effect on news worldwide, and has contributed to sweeping changes in the news industry in all media. This study looks at the changes and the evolving strategy wrought by online news in the newspaper industry in two countries. In order to do this comparison, a model of the US experience has been constructed, using material published in the US academic and professional journalism press. Since there is no equivalent published material available dealing with the South African experience, interviews were conducted with staff at two newspaper companies (Johnnic and Naspers), and a broad historical overview was created for each company. These “narrative histories” were then compared with the US model, and areas of commonality and difference were highlighted and discussed. Several structural and national differences be tween the two countries were also raised and analysed. Finally, a conclusion as to how applicable the US model is to the South African experience is drawn, and suggestions are made for further study.
- Full Text:
- Date Issued: 2002
- Authors: Knight, Margaret Anne
- Date: 2002
- Subjects: Electronic newspapers -- South Africa , Electronic newspapers -- United States , Electronic news gathering -- South Africa , Electronic news gathering -- United States
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3447 , http://hdl.handle.net/10962/d1002901 , Electronic newspapers -- South Africa , Electronic newspapers -- United States , Electronic news gathering -- South Africa , Electronic news gathering -- United States
- Description: This study examines the evolution of online news strategy in South African and American newspaper companies, and compares the approaches used in the two countries. The Internet has had a major effect on news worldwide, and has contributed to sweeping changes in the news industry in all media. This study looks at the changes and the evolving strategy wrought by online news in the newspaper industry in two countries. In order to do this comparison, a model of the US experience has been constructed, using material published in the US academic and professional journalism press. Since there is no equivalent published material available dealing with the South African experience, interviews were conducted with staff at two newspaper companies (Johnnic and Naspers), and a broad historical overview was created for each company. These “narrative histories” were then compared with the US model, and areas of commonality and difference were highlighted and discussed. Several structural and national differences be tween the two countries were also raised and analysed. Finally, a conclusion as to how applicable the US model is to the South African experience is drawn, and suggestions are made for further study.
- Full Text:
- Date Issued: 2002
'n Kritiese evaluering na die effektiwiteit van bestuurstrategieë vir ekstensiewe wolskaapboerdery in die groter Burgersdorp omgewing
- Authors: Coetzee, Johanna Magdalena
- Date: 2002
- Subjects: Sheep ranches -- South Africa -- Burgersdorp -- Management , Sheep industry -- South Africa -- Burgersdorp
- Language: Afrikaans
- Type: Thesis , Masters , MTech
- Identifier: vital:10953 , http://hdl.handle.net/10948/109 , Sheep ranches -- South Africa -- Burgersdorp -- Management , Sheep industry -- South Africa -- Burgersdorp
- Description: The main objectives of this study can be divided into three categories. In the first place it refers to the determination of production- and reproduction norms for the different main production areas in the greater Burgersdorp area, to promote production. In the second place it refers to the determination of the different management styles of sheep farmers in the greater Burgersdorp area. In the third place it refers to the calculation of gross margins for sheep farming in the greater Burgersdorp area, to establish the sustainable economic position. The survey area (the greater Burgersdorp area) includes the magisterial districts of Burgersdorp, Molteno, Steynsburg and Venterstad. The four magisterial districts were divided into two main production areas namely Stormberg Highveld and Burgersdorp Lowveld. Stormberg Highveld includes Molteno and the high-lying area (highveld) of Burgersdorp. Burgersdorp Lowveld comprises Steynsburg, Venterstad and the low-lying area (lowveld) of Burgersdorp. The management strategies of sheep farmers in the survey area were determined by means of a questionnaire and statistically analysed. The economic analyses of the sheep industry (wool and meat) were performed with the Geyer computer model. In this study it showed that the Dorper farmers obtained the highest gross margin per sheep. The lowest gross margin per sheep resulted from the Vleismerino farmers. Although the composition of the gross production value and the directly allocatable variable costs compare favourably, each main production area has unique management strategies for the different sheep breeds. The different management strategies can serve as the norm for extensive sheep farming, applicable to the specific main production area.
- Full Text:
- Date Issued: 2002
- Authors: Coetzee, Johanna Magdalena
- Date: 2002
- Subjects: Sheep ranches -- South Africa -- Burgersdorp -- Management , Sheep industry -- South Africa -- Burgersdorp
- Language: Afrikaans
- Type: Thesis , Masters , MTech
- Identifier: vital:10953 , http://hdl.handle.net/10948/109 , Sheep ranches -- South Africa -- Burgersdorp -- Management , Sheep industry -- South Africa -- Burgersdorp
- Description: The main objectives of this study can be divided into three categories. In the first place it refers to the determination of production- and reproduction norms for the different main production areas in the greater Burgersdorp area, to promote production. In the second place it refers to the determination of the different management styles of sheep farmers in the greater Burgersdorp area. In the third place it refers to the calculation of gross margins for sheep farming in the greater Burgersdorp area, to establish the sustainable economic position. The survey area (the greater Burgersdorp area) includes the magisterial districts of Burgersdorp, Molteno, Steynsburg and Venterstad. The four magisterial districts were divided into two main production areas namely Stormberg Highveld and Burgersdorp Lowveld. Stormberg Highveld includes Molteno and the high-lying area (highveld) of Burgersdorp. Burgersdorp Lowveld comprises Steynsburg, Venterstad and the low-lying area (lowveld) of Burgersdorp. The management strategies of sheep farmers in the survey area were determined by means of a questionnaire and statistically analysed. The economic analyses of the sheep industry (wool and meat) were performed with the Geyer computer model. In this study it showed that the Dorper farmers obtained the highest gross margin per sheep. The lowest gross margin per sheep resulted from the Vleismerino farmers. Although the composition of the gross production value and the directly allocatable variable costs compare favourably, each main production area has unique management strategies for the different sheep breeds. The different management strategies can serve as the norm for extensive sheep farming, applicable to the specific main production area.
- Full Text:
- Date Issued: 2002
Investigation of the bioconversion of constituents of olive effluents for the production of valuable chemical compounds
- Authors: Notshe, Thandiwe Loretta
- Date: 2002
- Subjects: Phenols , Sewage -- Purification , Effluent quality
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4078 , http://hdl.handle.net/10962/d1007446 , Phenols , Sewage -- Purification , Effluent quality
- Description: Olive mill wastewater is produced in large quantities during the production of olive oil and olive production effluents are produced during the processing of olives. This project was planned to find a use for constituents found in olive production wastewater. The task was carried out by first characterizing the olive effluents, then screening microorganisms for growth in the effluents and reduction of the pollutant properties of the effluents. An investigation into the biotransformation of aromatic compounds present in the effluents into useful chemicals, was carried out. The olive production effluents were collected from different stages in the process for treating olive wastewater, viz, a fermentation tank (FB), the surface of a digester (LV) and an evaporation pond (SO). The three effluents were characterized by investigating their phenolic composition. Protocatechuic acid, vanillic acid, syringic acid, hydroxyphenyl acetic acid, coumaric acid and ferulic acid were identified in an olive effluent, FB, using thin layer chromatography (TLC) and High perfomance liquid chromatography (HPLC). Hydroxyphenyl acetic acid constitutes almost 60% of the organics in olive effluent FB. Five bacteria, namely RU-LV1; RU-FBI and RU-FB2; RU-SOI and RU-S02, were isolated from the olive effluents LV, FB and SO respectively. These isolates were found to be halotolerant and were able to grow over a broad temperature and pH range, with the maximum temperature and pH for growth being 28°C and pH 7 respectively. A range of microorganisms were evaluated for their ability to grow and reduce the total phenolic content of the olive effluents. Among these Neurospora crassa showed the highest potential for the biological reduction of total phenolics in olive effluents. Approximately 70% of the total phenolic content was removed by N. crassa. Trametes verscilor, Pseudomonas putida strains, RU-KMI and RU-KM3s, and the bacteria isolated from olive effluents could also degrade the total phenolic content of olive effluents, but to a lesser extent. The ability of the five bacterial isolates to grow and degrade aromatic compounds was assessed by growing them in medium with standard aromatic compounds. RU-L V1 degraded 96%, 100%, 73% and 100% of caffeic acid, protocatechuic acid, p-coumaric acid and vanillic acid respectively. The other isolates degraded caffeic acid and protocatechuic acid, but their ability to degraded p-coumaric acid and vanillic acid was found to be lesser than the ability of RU-LV1 to degrade the same aromatic compounds. Whole cells of RU-LV1 degraded vanillic acid but no metabolic products were observed on HPLC analysis. Resting cells, French pressed extract, cell free extracts and cell debris from RU-LV1 cells induced with vanillic acid degraded vanillic acid, ferulic acid and vanillin at rates higher than those obtained from non-induced cultures. No products were observed during the degradation of vanillic acid. Ferulic acid was converted into vanillic acid by French pressed extract, cell free extract and cell debris of RU-LV1. The maximum yield of vanillic acid as a product (0 .23 mM, 50 %yield) was obtained when cell free extracts of RU-LVI, grown in glucose and induced by vanillic acid, were used for the degradation of 0.4 mM ferulic acid. Vanillin was rapidly converted into vanillic acid by resting cells, cell free extracts and French pressed extract of RU-LVI. Using molecular techniques, the similarity ranking of the RU-LVI 16S rRNA gene and its clone showed a high similarity to Corynebacterium glutamicum and Corynebacterium acedopltilum. The rapid degradation of vanillin to vanillic acid suggests that extracts from RU-LV1 degrade ferulic acid into vanillin which is immediately oxidized to vanillic acid. Vanillic acid is also considered as a high value chemical. This project has a potential of producing useful chemicals from cheap substrates that can be found in olive effluents. , KMBT_363
- Full Text:
- Date Issued: 2002
- Authors: Notshe, Thandiwe Loretta
- Date: 2002
- Subjects: Phenols , Sewage -- Purification , Effluent quality
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4078 , http://hdl.handle.net/10962/d1007446 , Phenols , Sewage -- Purification , Effluent quality
- Description: Olive mill wastewater is produced in large quantities during the production of olive oil and olive production effluents are produced during the processing of olives. This project was planned to find a use for constituents found in olive production wastewater. The task was carried out by first characterizing the olive effluents, then screening microorganisms for growth in the effluents and reduction of the pollutant properties of the effluents. An investigation into the biotransformation of aromatic compounds present in the effluents into useful chemicals, was carried out. The olive production effluents were collected from different stages in the process for treating olive wastewater, viz, a fermentation tank (FB), the surface of a digester (LV) and an evaporation pond (SO). The three effluents were characterized by investigating their phenolic composition. Protocatechuic acid, vanillic acid, syringic acid, hydroxyphenyl acetic acid, coumaric acid and ferulic acid were identified in an olive effluent, FB, using thin layer chromatography (TLC) and High perfomance liquid chromatography (HPLC). Hydroxyphenyl acetic acid constitutes almost 60% of the organics in olive effluent FB. Five bacteria, namely RU-LV1; RU-FBI and RU-FB2; RU-SOI and RU-S02, were isolated from the olive effluents LV, FB and SO respectively. These isolates were found to be halotolerant and were able to grow over a broad temperature and pH range, with the maximum temperature and pH for growth being 28°C and pH 7 respectively. A range of microorganisms were evaluated for their ability to grow and reduce the total phenolic content of the olive effluents. Among these Neurospora crassa showed the highest potential for the biological reduction of total phenolics in olive effluents. Approximately 70% of the total phenolic content was removed by N. crassa. Trametes verscilor, Pseudomonas putida strains, RU-KMI and RU-KM3s, and the bacteria isolated from olive effluents could also degrade the total phenolic content of olive effluents, but to a lesser extent. The ability of the five bacterial isolates to grow and degrade aromatic compounds was assessed by growing them in medium with standard aromatic compounds. RU-L V1 degraded 96%, 100%, 73% and 100% of caffeic acid, protocatechuic acid, p-coumaric acid and vanillic acid respectively. The other isolates degraded caffeic acid and protocatechuic acid, but their ability to degraded p-coumaric acid and vanillic acid was found to be lesser than the ability of RU-LV1 to degrade the same aromatic compounds. Whole cells of RU-LV1 degraded vanillic acid but no metabolic products were observed on HPLC analysis. Resting cells, French pressed extract, cell free extracts and cell debris from RU-LV1 cells induced with vanillic acid degraded vanillic acid, ferulic acid and vanillin at rates higher than those obtained from non-induced cultures. No products were observed during the degradation of vanillic acid. Ferulic acid was converted into vanillic acid by French pressed extract, cell free extract and cell debris of RU-LV1. The maximum yield of vanillic acid as a product (0 .23 mM, 50 %yield) was obtained when cell free extracts of RU-LVI, grown in glucose and induced by vanillic acid, were used for the degradation of 0.4 mM ferulic acid. Vanillin was rapidly converted into vanillic acid by resting cells, cell free extracts and French pressed extract of RU-LVI. Using molecular techniques, the similarity ranking of the RU-LVI 16S rRNA gene and its clone showed a high similarity to Corynebacterium glutamicum and Corynebacterium acedopltilum. The rapid degradation of vanillin to vanillic acid suggests that extracts from RU-LV1 degrade ferulic acid into vanillin which is immediately oxidized to vanillic acid. Vanillic acid is also considered as a high value chemical. This project has a potential of producing useful chemicals from cheap substrates that can be found in olive effluents. , KMBT_363
- Full Text:
- Date Issued: 2002
A systems approach to marketing in less developed agriculture with reference to Bululwane Irrigation Scheme
- Authors: Zenda, Sipho Macriba
- Date: 2002
- Subjects: Farm produce -- South Africa -- Marketing , Farms, Small -- South Africa , Sustainable agriculture -- South Africa , Agricultural development projects -- South Africa , Irrigation farming -- South Africa
- Language: English
- Type: Thesis , Masters , MSc Agric (Agricultural Economics)
- Identifier: vital:11192 , http://hdl.handle.net/10353/d1001045 , Farm produce -- South Africa -- Marketing , Farms, Small -- South Africa , Sustainable agriculture -- South Africa , Agricultural development projects -- South Africa , Irrigation farming -- South Africa
- Full Text: false
- Date Issued: 2002
- Authors: Zenda, Sipho Macriba
- Date: 2002
- Subjects: Farm produce -- South Africa -- Marketing , Farms, Small -- South Africa , Sustainable agriculture -- South Africa , Agricultural development projects -- South Africa , Irrigation farming -- South Africa
- Language: English
- Type: Thesis , Masters , MSc Agric (Agricultural Economics)
- Identifier: vital:11192 , http://hdl.handle.net/10353/d1001045 , Farm produce -- South Africa -- Marketing , Farms, Small -- South Africa , Sustainable agriculture -- South Africa , Agricultural development projects -- South Africa , Irrigation farming -- South Africa
- Full Text: false
- Date Issued: 2002
Representations of women in women's magazines
- Authors: Ndzamela, Viwe
- Date: 2002
- Subjects: Women in mass media , Women's periodicals, South African
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3475 , http://hdl.handle.net/10962/d1002930 , Women in mass media , Women's periodicals, South African
- Description: Women’s magazines as a popular form of entertainment are among the media products that have been criticised for misrepresenting women. These popular magazines are often condemned for their failure to represent women in a positive light although they claim to target women as their market. The objective of this research is to assess and analyse representations of women in selected women’s magazines. Because women’s magazines are part of popular culture, which is not only concerned with the production process but also takes into consideration the needs of the readers, the research seeks to find out whether these magazines meet the expectations of its readers. The study is a combination of qualitative analysis, which looks at the frequency and the manner in which women are represented, with a qualitative interpretation of women’s roles within those representations. The issue of representations of women in women’s magazines is a very complex one as magazines, like other cultural texts are open to multiple interpretations. Consequently, multiple conclusions have been reached and the outcome of the study is therefore a series of three conclusions based on feature articles, advertisements and at a theoretical level.
- Full Text:
- Date Issued: 2002
- Authors: Ndzamela, Viwe
- Date: 2002
- Subjects: Women in mass media , Women's periodicals, South African
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3475 , http://hdl.handle.net/10962/d1002930 , Women in mass media , Women's periodicals, South African
- Description: Women’s magazines as a popular form of entertainment are among the media products that have been criticised for misrepresenting women. These popular magazines are often condemned for their failure to represent women in a positive light although they claim to target women as their market. The objective of this research is to assess and analyse representations of women in selected women’s magazines. Because women’s magazines are part of popular culture, which is not only concerned with the production process but also takes into consideration the needs of the readers, the research seeks to find out whether these magazines meet the expectations of its readers. The study is a combination of qualitative analysis, which looks at the frequency and the manner in which women are represented, with a qualitative interpretation of women’s roles within those representations. The issue of representations of women in women’s magazines is a very complex one as magazines, like other cultural texts are open to multiple interpretations. Consequently, multiple conclusions have been reached and the outcome of the study is therefore a series of three conclusions based on feature articles, advertisements and at a theoretical level.
- Full Text:
- Date Issued: 2002
The relationship between three anxiety related clusters in projective drawings and anxiety and ego-strength scales of the Minnesota multiphasic personality inventory-2
- Authors: Brink, André
- Date: 2002
- Subjects: Projective techniques , Personality assessment , Personality tests , Anxiety , Minnesota Multiphasic Personality Inventory
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2942 , http://hdl.handle.net/10962/d1002451 , Projective techniques , Personality assessment , Personality tests , Anxiety , Minnesota Multiphasic Personality Inventory
- Description: Based on the shortcomings of past research, the need for understanding and investigation of the general relationship between self-report measures and human figure drawings required understanding and investigation (Riethmiller & Handler, 1997b; Waehler, 1997) while utilising a quantitative, configural scoring approach. Riethmiller and Handler (1997a; 1997b) hypothesised that subjects have one of two typical approach styles to anxiety/stress that influences their execution of the Human Figure Drawing (HFD) Test: “Avoidance” or “Coping” as measured by composite scoring index clusters. They argue that these two approach styles had to be taken into account when investigating anxiety on the HFD Test. According to Handler and Reyher (1965) those who experience more intense anxiety typically rely on an “Avoidant” approach, while those with lower anxiety typically rely on a “Coping” approach. The “Coping” response is hypothesised to suggest good ego-strength, and the “Avoidant” response poor ego-strength. Handler and Reyher (1964; 1965; 1966) also argued that there are two sources of anxiety on projective drawings: internal and external sources of anxiety. They hypothesised that the “External” anxiety cluster (measured by utilising the car drawing) and self-report measures both assess ‘external’ anxiety. Using Handler’s (1967) HFD index scoring manual, this research therefore inve stigated the level of correlation of the two MMPI-2 anxiety scale scores with (a) the hypothesised Stress Approach HFD cluster scores, as well as with (b) the “External” anxiety cluster score, while the hypothesised Stress Approach HFD cluster scores were compared with the (c) MMPI-2 ego strength scale score. The results of the investigated relationships yielded non-significant correlations overall. The differences in nature of the two measurement instruments, and the potential weaknesses of this study, as two likely explanations for these correlations, are discussed. In the consideration of the differences of the two measurement instruments, the weaknesses of SR measures and criterion-related validity are discussed while self- attributed and implicit motives are contrasted with each other. Potential extraneous variables and possible truncated range are discussed as potential weaknesses of this study.
- Full Text:
- Date Issued: 2002
- Authors: Brink, André
- Date: 2002
- Subjects: Projective techniques , Personality assessment , Personality tests , Anxiety , Minnesota Multiphasic Personality Inventory
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2942 , http://hdl.handle.net/10962/d1002451 , Projective techniques , Personality assessment , Personality tests , Anxiety , Minnesota Multiphasic Personality Inventory
- Description: Based on the shortcomings of past research, the need for understanding and investigation of the general relationship between self-report measures and human figure drawings required understanding and investigation (Riethmiller & Handler, 1997b; Waehler, 1997) while utilising a quantitative, configural scoring approach. Riethmiller and Handler (1997a; 1997b) hypothesised that subjects have one of two typical approach styles to anxiety/stress that influences their execution of the Human Figure Drawing (HFD) Test: “Avoidance” or “Coping” as measured by composite scoring index clusters. They argue that these two approach styles had to be taken into account when investigating anxiety on the HFD Test. According to Handler and Reyher (1965) those who experience more intense anxiety typically rely on an “Avoidant” approach, while those with lower anxiety typically rely on a “Coping” approach. The “Coping” response is hypothesised to suggest good ego-strength, and the “Avoidant” response poor ego-strength. Handler and Reyher (1964; 1965; 1966) also argued that there are two sources of anxiety on projective drawings: internal and external sources of anxiety. They hypothesised that the “External” anxiety cluster (measured by utilising the car drawing) and self-report measures both assess ‘external’ anxiety. Using Handler’s (1967) HFD index scoring manual, this research therefore inve stigated the level of correlation of the two MMPI-2 anxiety scale scores with (a) the hypothesised Stress Approach HFD cluster scores, as well as with (b) the “External” anxiety cluster score, while the hypothesised Stress Approach HFD cluster scores were compared with the (c) MMPI-2 ego strength scale score. The results of the investigated relationships yielded non-significant correlations overall. The differences in nature of the two measurement instruments, and the potential weaknesses of this study, as two likely explanations for these correlations, are discussed. In the consideration of the differences of the two measurement instruments, the weaknesses of SR measures and criterion-related validity are discussed while self- attributed and implicit motives are contrasted with each other. Potential extraneous variables and possible truncated range are discussed as potential weaknesses of this study.
- Full Text:
- Date Issued: 2002
Achieving successful implementation of lean manufacturing control systems, to achieve world class status, at Ford Motor Componay of Southern Africa
- Authors: Govender, Shawn Prakash
- Date: 2002
- Subjects: Ford Motor Company of South Africa , Automobile industry and trade -- Management , Automobile industry and trade -- South Africa , Manufacturing industries -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10909 , http://hdl.handle.net/10948/75 , Ford Motor Company of South Africa , Automobile industry and trade -- Management , Automobile industry and trade -- South Africa , Manufacturing industries -- Management
- Description: Ford Motor Company embarked on a new engine programme, called the Rocam Engine Programme, in the year 2001. This engine was developed specifically for the European market. The customer demand rate was small initially, but ramped up slowly over time. During the low production volume period, this engine was introduced into the local market to test the publics’ response. The response was overwhelmingly positive. The local market grew considerably in a short space of time. During the same time-period, the European customer demand increased, unexpectedly, by approximately 60 percent. The additional production volume placed an enormous amount of pressure on the Engine Plant facility. Two of the production lines in particular, were taking huge strain. These lines were not producing the demand quantities, and the product quality levels were dropping quickly. The research project is based purely on the lean manufacturing principles and philosophies. The aim of the study is to identify the deficiencies on these two production lines, thereby allowing corrective action to be taken. The research methodology comprised of the following steps: · A literature study was performed to give the reader a better understanding of the principles and philosophies of lean manufacturing. · A second literature study was also performed to get a better understanding of the continuous improvement philosophies of lean manufacturing. · A current state map, which depicts the existing situation on the line, was developed for both production lines. The existing situation was then compared to the fundamental principles and philosophies of a lean manufacturer. In this way the deficiencies were highlighted to management. Several recommendations were made regarding the data obtained in the study. The key ones are as follows: · First-line management needs to be trained and coached into managing their business by using quality, cost and delivery as the key performance metrics. They also have to be trained in team dynamics. This will promote cross-functional brainstorming and problem solving sessions. · The accurate collection and processing of base-measurement data should be treated as cardinal, and road shows by production personnel should be presented every week to top management. This will ensure that data is regularly collected and corrective action is continually taken to improve the current situation. Operating personnel needs to be trained in this discipline. Management needs to be serious about implementing lean production principles by enforcing these road shows. · The objectives of Kaizen, production management and the supporting departments (including maintenance and MP&L) ought to be the same in the interest of maximum productivity i.e. leaning towards world class. · First-line management must develop formal structured plans that will rectify the current on-line situation. Plans must include medium to longterm objective setting. Senior management need to coach the first-line management in this discipline. · Few production systems can be implemented without the necessary infrastructure conducive to supporting it. An infrastructure where production gets involved and takes ownership (policy deployment with regards to lines of communication and responsibility between Area Managers, Production Coordinators, Team Leaders and contractors) is what is required. Lean manufacturing deficiencies on the two production lines have been identified. A detailed implementation plan, which needs to be developed by the Ford Production System department, needs to be given to management. This plan needs to address the identified deficiencies in a timely manner that will assist in the Engine Plant meeting their production targets.
- Full Text:
- Date Issued: 2002
- Authors: Govender, Shawn Prakash
- Date: 2002
- Subjects: Ford Motor Company of South Africa , Automobile industry and trade -- Management , Automobile industry and trade -- South Africa , Manufacturing industries -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10909 , http://hdl.handle.net/10948/75 , Ford Motor Company of South Africa , Automobile industry and trade -- Management , Automobile industry and trade -- South Africa , Manufacturing industries -- Management
- Description: Ford Motor Company embarked on a new engine programme, called the Rocam Engine Programme, in the year 2001. This engine was developed specifically for the European market. The customer demand rate was small initially, but ramped up slowly over time. During the low production volume period, this engine was introduced into the local market to test the publics’ response. The response was overwhelmingly positive. The local market grew considerably in a short space of time. During the same time-period, the European customer demand increased, unexpectedly, by approximately 60 percent. The additional production volume placed an enormous amount of pressure on the Engine Plant facility. Two of the production lines in particular, were taking huge strain. These lines were not producing the demand quantities, and the product quality levels were dropping quickly. The research project is based purely on the lean manufacturing principles and philosophies. The aim of the study is to identify the deficiencies on these two production lines, thereby allowing corrective action to be taken. The research methodology comprised of the following steps: · A literature study was performed to give the reader a better understanding of the principles and philosophies of lean manufacturing. · A second literature study was also performed to get a better understanding of the continuous improvement philosophies of lean manufacturing. · A current state map, which depicts the existing situation on the line, was developed for both production lines. The existing situation was then compared to the fundamental principles and philosophies of a lean manufacturer. In this way the deficiencies were highlighted to management. Several recommendations were made regarding the data obtained in the study. The key ones are as follows: · First-line management needs to be trained and coached into managing their business by using quality, cost and delivery as the key performance metrics. They also have to be trained in team dynamics. This will promote cross-functional brainstorming and problem solving sessions. · The accurate collection and processing of base-measurement data should be treated as cardinal, and road shows by production personnel should be presented every week to top management. This will ensure that data is regularly collected and corrective action is continually taken to improve the current situation. Operating personnel needs to be trained in this discipline. Management needs to be serious about implementing lean production principles by enforcing these road shows. · The objectives of Kaizen, production management and the supporting departments (including maintenance and MP&L) ought to be the same in the interest of maximum productivity i.e. leaning towards world class. · First-line management must develop formal structured plans that will rectify the current on-line situation. Plans must include medium to longterm objective setting. Senior management need to coach the first-line management in this discipline. · Few production systems can be implemented without the necessary infrastructure conducive to supporting it. An infrastructure where production gets involved and takes ownership (policy deployment with regards to lines of communication and responsibility between Area Managers, Production Coordinators, Team Leaders and contractors) is what is required. Lean manufacturing deficiencies on the two production lines have been identified. A detailed implementation plan, which needs to be developed by the Ford Production System department, needs to be given to management. This plan needs to address the identified deficiencies in a timely manner that will assist in the Engine Plant meeting their production targets.
- Full Text:
- Date Issued: 2002
An investigation into the viability of deploying thin client technology to support effective learning in a disadvantaged, rural high school setting
- Authors: Ndwe, Tembalethu Jama
- Date: 2002
- Subjects: Network computers , Education -- Data processing
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4627 , http://hdl.handle.net/10962/d1006500 , Network computers , Education -- Data processing
- Description: Computer Based Training offers many attractive learning opportunities for high school pupils. Its deployment in economically depressed and educationally marginalized rural schools is extremely uncommon due to the high technology skills and costs involved in its deployment and ongoing maintenance. This thesis puts forward thin client technology as a potential solution to the needs of education environments of this kind. A functional business case is developed and evaluated in this thesis, based upon a requirements analysis of media delivery in learning, and upon formal cost/performance models and a deployment field trial. Because of the economic constraints of the envisaged deployment area in rural education, an industrial field trial is used, and the aspects of this trial that can be carried over to the rural school situation have been used to assess performance and cost indicators. Our study finds that thin client technology could be deployed and maintained more cost effectively than conventional fat client solutions in rural schools, that it is capable of supporting the learning elements needed in this deployment area, and that it is able to deliver the predominantly text based applications currently being used in schools. However, we find that technological improvements are needed before future multimediaintensive applications can be adequately supported.
- Full Text:
- Date Issued: 2002
- Authors: Ndwe, Tembalethu Jama
- Date: 2002
- Subjects: Network computers , Education -- Data processing
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4627 , http://hdl.handle.net/10962/d1006500 , Network computers , Education -- Data processing
- Description: Computer Based Training offers many attractive learning opportunities for high school pupils. Its deployment in economically depressed and educationally marginalized rural schools is extremely uncommon due to the high technology skills and costs involved in its deployment and ongoing maintenance. This thesis puts forward thin client technology as a potential solution to the needs of education environments of this kind. A functional business case is developed and evaluated in this thesis, based upon a requirements analysis of media delivery in learning, and upon formal cost/performance models and a deployment field trial. Because of the economic constraints of the envisaged deployment area in rural education, an industrial field trial is used, and the aspects of this trial that can be carried over to the rural school situation have been used to assess performance and cost indicators. Our study finds that thin client technology could be deployed and maintained more cost effectively than conventional fat client solutions in rural schools, that it is capable of supporting the learning elements needed in this deployment area, and that it is able to deliver the predominantly text based applications currently being used in schools. However, we find that technological improvements are needed before future multimediaintensive applications can be adequately supported.
- Full Text:
- Date Issued: 2002