Decorating Asterisk : experiments in service creation for a multi-protocol telephony environment using open source tools
- Authors: Hitchcock, Jonathan
- Date: 2006
- Subjects: Asterisk (Computer file) , Internet telephony
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4635 , http://hdl.handle.net/10962/d1006539 , Asterisk (Computer file) , Internet telephony
- Description: As Voice over IP becomes more prevalent, value-adds to the service will become ubiquitous. Voice over IP (VoIP) is no longer a single service application, but an array of marketable services of increasing depth, which are moving into the non-desktop market. In addition, as the range of devices being generally used increases, it will become necessary for all services, including VoIP services, to be accessible from multiple platforms and through varied interfaces. With the recent introduction and growth of the open source software PBX system named Asterisk, the possibility of achieving these goals has become more concrete. In addition to Asterisk, a number of open source systems are being developed which facilitate the development of systems that interoperate over a wide variety of platforms and through multiple interfaces. This thesis investigates Asterisk in terms of its viability to provide the depth of services that will be required in a VoIP environment, as well as a number of other open source systems in terms of what they can offer such a system. In addition, it investigates whether these services can be made available on different devices. Using various systems built as a proof-of-concept, this thesis shows that Asterisk, in conjunction with various other open source projects, such as the Twisted framework provides a concrete tool which can be used to realise flexible and protocol independent telephony solutions for a small to medium enterprise.
- Full Text:
- Date Issued: 2006
- Authors: Hitchcock, Jonathan
- Date: 2006
- Subjects: Asterisk (Computer file) , Internet telephony
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4635 , http://hdl.handle.net/10962/d1006539 , Asterisk (Computer file) , Internet telephony
- Description: As Voice over IP becomes more prevalent, value-adds to the service will become ubiquitous. Voice over IP (VoIP) is no longer a single service application, but an array of marketable services of increasing depth, which are moving into the non-desktop market. In addition, as the range of devices being generally used increases, it will become necessary for all services, including VoIP services, to be accessible from multiple platforms and through varied interfaces. With the recent introduction and growth of the open source software PBX system named Asterisk, the possibility of achieving these goals has become more concrete. In addition to Asterisk, a number of open source systems are being developed which facilitate the development of systems that interoperate over a wide variety of platforms and through multiple interfaces. This thesis investigates Asterisk in terms of its viability to provide the depth of services that will be required in a VoIP environment, as well as a number of other open source systems in terms of what they can offer such a system. In addition, it investigates whether these services can be made available on different devices. Using various systems built as a proof-of-concept, this thesis shows that Asterisk, in conjunction with various other open source projects, such as the Twisted framework provides a concrete tool which can be used to realise flexible and protocol independent telephony solutions for a small to medium enterprise.
- Full Text:
- Date Issued: 2006
An exploration of the availability, development and use of learning support materials on waste management in Kwazulu-Natal : a case study
- Authors: Manqele, Mbaweni Beauty
- Date: 2006
- Subjects: Waste disposal in the ground -- South Africa -- KwaZulu-Natal Waste products -- Government policy -- South Africa Refuse and refuse disposal -- Government policy -- South Africa Refuse and refuse disposal -- Environmental aspects -- South Africa -- KwaZulu-Natal Refuse and refuse disposal -- South Africa -- KwaZulu-Natal Hazardous wastes -- Management -- South Africa -- KwaZulu-Natal Hazardous waste sites -- Government policy -- South Africa Environmental education -- South Africa -- KwaZulu-Natal Teaching -- Aids and devices -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1496 , http://hdl.handle.net/10962/d1003377
- Description: This case study was done in KwaZulu–Natal province in South Africa within two municipalities Ethekwini and Umsunduzi Municipality. Three communities participated in this study. The research is motivated by the lack of cooperation between some municipalities and Community Based Organisations (CBOs) in implementing the National Waste Management Strategy (NWMS) at a local level. The primary goal is to explore the availability and development of learning support materials (LSMs) that relates to waste management in collaboration with CBOs and local councillors. The secondary goal is to explore the use of learning support material to promote participation in the implementation of the NWMS. Coresearchers were from the Community Based Organisations as well as local councillors who are located within the communities of these CBOs. Pseudonyms for co-researchers from CBOs and Councillors and the name of their townships have been used to protect co-researchers. A literature review has been conducted to explore research that has been done on the development, usage, accessibility and distribution of the LSMs. Data collection methods included semi-structured interviews; field visits to communities, tape recording of discussions and the keeping of a field journal. Some of the key findings included that LSMs is used by both CBOs and Councillors to try to reduce local environmental problems. It also identified that there are no formal mechanisms between CBOs and Municipalities in dealing with waste management programmes within the identified communities. The other important finding was that the participation of CBOs in the development of LSMs normally excludes the user groups as a result language used is not always understood. Illustrations used in some cases may be misinterpreted if the reader is not English literate as most of material in circulation is written in English. Some recommendations for further research have been made in relation to the findings made in the study. These included recommendations on the development, usage of LSMs, participation of stakeholders in resource development within the context of CBOs and local municipalities.
- Full Text:
- Date Issued: 2006
- Authors: Manqele, Mbaweni Beauty
- Date: 2006
- Subjects: Waste disposal in the ground -- South Africa -- KwaZulu-Natal Waste products -- Government policy -- South Africa Refuse and refuse disposal -- Government policy -- South Africa Refuse and refuse disposal -- Environmental aspects -- South Africa -- KwaZulu-Natal Refuse and refuse disposal -- South Africa -- KwaZulu-Natal Hazardous wastes -- Management -- South Africa -- KwaZulu-Natal Hazardous waste sites -- Government policy -- South Africa Environmental education -- South Africa -- KwaZulu-Natal Teaching -- Aids and devices -- South Africa
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1496 , http://hdl.handle.net/10962/d1003377
- Description: This case study was done in KwaZulu–Natal province in South Africa within two municipalities Ethekwini and Umsunduzi Municipality. Three communities participated in this study. The research is motivated by the lack of cooperation between some municipalities and Community Based Organisations (CBOs) in implementing the National Waste Management Strategy (NWMS) at a local level. The primary goal is to explore the availability and development of learning support materials (LSMs) that relates to waste management in collaboration with CBOs and local councillors. The secondary goal is to explore the use of learning support material to promote participation in the implementation of the NWMS. Coresearchers were from the Community Based Organisations as well as local councillors who are located within the communities of these CBOs. Pseudonyms for co-researchers from CBOs and Councillors and the name of their townships have been used to protect co-researchers. A literature review has been conducted to explore research that has been done on the development, usage, accessibility and distribution of the LSMs. Data collection methods included semi-structured interviews; field visits to communities, tape recording of discussions and the keeping of a field journal. Some of the key findings included that LSMs is used by both CBOs and Councillors to try to reduce local environmental problems. It also identified that there are no formal mechanisms between CBOs and Municipalities in dealing with waste management programmes within the identified communities. The other important finding was that the participation of CBOs in the development of LSMs normally excludes the user groups as a result language used is not always understood. Illustrations used in some cases may be misinterpreted if the reader is not English literate as most of material in circulation is written in English. Some recommendations for further research have been made in relation to the findings made in the study. These included recommendations on the development, usage of LSMs, participation of stakeholders in resource development within the context of CBOs and local municipalities.
- Full Text:
- Date Issued: 2006
The behaviour and fundamental determinants of the real exchange rate in South Africa
- Authors: Takaendesa, Peter
- Date: 2006
- Subjects: Foreign exchange rates -- South Africa , Terms of trade -- South Africa , Finance -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:960 , http://hdl.handle.net/10962/d1002694 , Foreign exchange rates -- South Africa , Terms of trade -- South Africa , Finance -- South Africa
- Description: Real exchange rates have important effects on production, employment and trade, so it is crucial to understand the factors responsible for their variations. This study analyses the main determinants of the real exchange rate and the dynamic adjustment of the real exchange rate following shocks to those determinants, using quarterly South African data covering the period 1975 to 2005. It begins with a review of literature on the determinants of the real exchange rate and provides an updated background on the exchange rate system in South Africa. An empirical model linking the real exchange rate to its theoretical determinants is then specified. In contrast to previous analyses, this study augments the cointegration and vector autoregression (VAR) analysis with impulse response and variance decomposition analyses to provide robust long run effects and short run dynamic effects on the real exchange rate. The variables that have been found to have a long run relationship with the real exchange rate include the terms of trade, real interest rate differential, domestic credit, openness and technological progress. The estimate of the speed of adjustment coefficient found in this study indicates that about a third of the variation in the real exchange rate from its equilibrium level is corrected within a quarter. The impulse response functions broadly corroborate the theoretical predictions, but only the terms of trade, domestic credit and openness have a significant impact on the real exchange rate in the short run. However, only shocks to the terms of trade and domestic credit have persistent effects on the real exchange rate. Results from the variance decompositions are largely similar to those from the impulse response analysis. The terms of trade, domestic credit and openness are the only variables found to significantly explain the variation in the real exchange rate. The most interesting result that emerged from this analysis and is supported by previous research is that among other determinants, the terms of trade explain the largest proportion of the variation in the real exchange. On balance, the evidence therefore suggests that real exchange rate fluctuations are predominantly equilibrium responses to real and monetary shocks rather than fiscal policy shocks.
- Full Text:
- Date Issued: 2006
- Authors: Takaendesa, Peter
- Date: 2006
- Subjects: Foreign exchange rates -- South Africa , Terms of trade -- South Africa , Finance -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:960 , http://hdl.handle.net/10962/d1002694 , Foreign exchange rates -- South Africa , Terms of trade -- South Africa , Finance -- South Africa
- Description: Real exchange rates have important effects on production, employment and trade, so it is crucial to understand the factors responsible for their variations. This study analyses the main determinants of the real exchange rate and the dynamic adjustment of the real exchange rate following shocks to those determinants, using quarterly South African data covering the period 1975 to 2005. It begins with a review of literature on the determinants of the real exchange rate and provides an updated background on the exchange rate system in South Africa. An empirical model linking the real exchange rate to its theoretical determinants is then specified. In contrast to previous analyses, this study augments the cointegration and vector autoregression (VAR) analysis with impulse response and variance decomposition analyses to provide robust long run effects and short run dynamic effects on the real exchange rate. The variables that have been found to have a long run relationship with the real exchange rate include the terms of trade, real interest rate differential, domestic credit, openness and technological progress. The estimate of the speed of adjustment coefficient found in this study indicates that about a third of the variation in the real exchange rate from its equilibrium level is corrected within a quarter. The impulse response functions broadly corroborate the theoretical predictions, but only the terms of trade, domestic credit and openness have a significant impact on the real exchange rate in the short run. However, only shocks to the terms of trade and domestic credit have persistent effects on the real exchange rate. Results from the variance decompositions are largely similar to those from the impulse response analysis. The terms of trade, domestic credit and openness are the only variables found to significantly explain the variation in the real exchange rate. The most interesting result that emerged from this analysis and is supported by previous research is that among other determinants, the terms of trade explain the largest proportion of the variation in the real exchange. On balance, the evidence therefore suggests that real exchange rate fluctuations are predominantly equilibrium responses to real and monetary shocks rather than fiscal policy shocks.
- Full Text:
- Date Issued: 2006
Reactions in the solid state
- Authors: Brown, Michael Ewart
- Date: 2006
- Subjects: Solid state chemistry , Thermal analysis , Chemistry, Analytic
- Language: English
- Type: Thesis , Doctoral , DSc
- Identifier: vital:4529 , http://hdl.handle.net/10962/d1015762
- Description: I have chosen the title for this thesis, "Reactions in the Solid State", for two reasons: Firstly, it is broad enough to cover all of my areas of research, which have been: • Effects of irradiation on solids (PhD topic) • Silver refining (while at the Chamber of Mines) • Kinetics of decomposition of solids (with Dr A.K. Galwey and various others) • Techniques of thermal analysis • Pyrotechnic delay systems (with support from AECI Explosives) • Thermal and photostability of drugs (with Prof B.D. Glass) and, secondly, it was the title of the very successful book co-authored by Drs Andrew Galwey, David Dollimore and me. A large part of my research has been involved in the writing and editing of books, so these are covered in a separate commentary, while commentary on the more than 100 papers to which I have contributed forms the main part of this compilation. It is hoped that the electronic format will enable ready access of to all aspects of my research, including electronic versions of the original papers. The reader will need a copy of Adobe Acrobat Reader to access these.
- Full Text:
- Date Issued: 2006
- Authors: Brown, Michael Ewart
- Date: 2006
- Subjects: Solid state chemistry , Thermal analysis , Chemistry, Analytic
- Language: English
- Type: Thesis , Doctoral , DSc
- Identifier: vital:4529 , http://hdl.handle.net/10962/d1015762
- Description: I have chosen the title for this thesis, "Reactions in the Solid State", for two reasons: Firstly, it is broad enough to cover all of my areas of research, which have been: • Effects of irradiation on solids (PhD topic) • Silver refining (while at the Chamber of Mines) • Kinetics of decomposition of solids (with Dr A.K. Galwey and various others) • Techniques of thermal analysis • Pyrotechnic delay systems (with support from AECI Explosives) • Thermal and photostability of drugs (with Prof B.D. Glass) and, secondly, it was the title of the very successful book co-authored by Drs Andrew Galwey, David Dollimore and me. A large part of my research has been involved in the writing and editing of books, so these are covered in a separate commentary, while commentary on the more than 100 papers to which I have contributed forms the main part of this compilation. It is hoped that the electronic format will enable ready access of to all aspects of my research, including electronic versions of the original papers. The reader will need a copy of Adobe Acrobat Reader to access these.
- Full Text:
- Date Issued: 2006
Pharmaceutical analysis and drug interaction studies : African potato (Hypoxis hemerocallidea)
- Purushothaman Nair, Vipin Devi Prasad
- Authors: Purushothaman Nair, Vipin Devi Prasad
- Date: 2006
- Subjects: Potatoes -- Africa , Potatoes -- Therapeutic use , AIDS (Disease) -- Treatment , HIV infections -- Drug therapy , Medicinal plants
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3865 , http://hdl.handle.net/10962/d1015802
- Description: In order for a medicinal product to produce a consistent and reliable therapeutic response, it is essential that the final composition of the product is invariable and that the active ingredient/s is/are present in appropriate, non-toxic amounts. However, due to the complexity involved in the standardization of natural products, quality control (QC) criteria and procedures for the registration and market approval of such products are conspicuously absent in most countries around the world. African Potato (AP) is of great medical interest and this particular plant has gained tremendous popularity following the endorsement by the South African Minister of Health as a remedy for HIV/ AIDS patients. Very little information has appeared in the literature to describe methods for the quantitative analysis of hypoxoside, an important component in AP. It has also been claimed that sterols and sterolins present in AP are responsible for its medicinal property but is yet to be proven scientifically. To-date, no QC methods have been reported for the simultaneous quantitative analysis of the combination, β- sitosterol (BSS)/ stigmasterol (STG)/ stigmastanol (STN), purported to be present in preparations containing AP. The effect of concomitant administration of AP and other herbal medicines on the safety and efficacy of conventional medicines has not yet been fully determined. Amongst the objectives of this study was to develop and validate quantitative analytical methods that are suitable for the assay and quality control of plant material, extracts and commercial formulations containing AP. Hypoxoside was isolated from AP and characterized for use as a reference standard for the quality control of AP products and a stability-indicating HPLC/ UV assay method for the quantitative determination of hypoxoside was developed. In addition, a quantitative capillary zone electrophoretic (CZE) method was developed to determine hypoxoside, specifically for its advantages over HPLC. A HPLC method was also developed and validated for the quantitative analysis of BSS, STG and STN in commercially available oral dosage forms containing AP material or extracts thereof. The antioxidant activity of an aqueous extract of lyophilized corms of AP along with hypoxoside and rooperol were investigated. In comparison with the AP extracts and also with hypoxoside, rooperol showed significant antioxidant activity. The capacity of AP, (extracts, formulations, hypoxoside and rooperol as well as sterols to inhibit in vitro metabolism of drug substrates by human cytochrome P450 (CYP) enzymes such as CYP 3A4, 3A5 and CYP19 were investigated. Samples were also assessed for their effect on drug transport proteins such as P-glycoprotein (P-gp). Various extracts of AP, AP formulations, stigmasterol and the norlignans, in particular the aglycone rooperol, exhibited inhibitory effects on CYP 3A4, 3A5 and CYP19 mediated metabolism.These results suggest that concurrent therapy with AP and other medicines, in particular antiretroviral drugs, can have important implications for safety and efficacy. Large discrepancies in marker content between AP products were found. Dissolution testing of AP products was investigated as a QC tool and the results also revealed inconsistencies between different AP products.
- Full Text:
- Date Issued: 2006
- Authors: Purushothaman Nair, Vipin Devi Prasad
- Date: 2006
- Subjects: Potatoes -- Africa , Potatoes -- Therapeutic use , AIDS (Disease) -- Treatment , HIV infections -- Drug therapy , Medicinal plants
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3865 , http://hdl.handle.net/10962/d1015802
- Description: In order for a medicinal product to produce a consistent and reliable therapeutic response, it is essential that the final composition of the product is invariable and that the active ingredient/s is/are present in appropriate, non-toxic amounts. However, due to the complexity involved in the standardization of natural products, quality control (QC) criteria and procedures for the registration and market approval of such products are conspicuously absent in most countries around the world. African Potato (AP) is of great medical interest and this particular plant has gained tremendous popularity following the endorsement by the South African Minister of Health as a remedy for HIV/ AIDS patients. Very little information has appeared in the literature to describe methods for the quantitative analysis of hypoxoside, an important component in AP. It has also been claimed that sterols and sterolins present in AP are responsible for its medicinal property but is yet to be proven scientifically. To-date, no QC methods have been reported for the simultaneous quantitative analysis of the combination, β- sitosterol (BSS)/ stigmasterol (STG)/ stigmastanol (STN), purported to be present in preparations containing AP. The effect of concomitant administration of AP and other herbal medicines on the safety and efficacy of conventional medicines has not yet been fully determined. Amongst the objectives of this study was to develop and validate quantitative analytical methods that are suitable for the assay and quality control of plant material, extracts and commercial formulations containing AP. Hypoxoside was isolated from AP and characterized for use as a reference standard for the quality control of AP products and a stability-indicating HPLC/ UV assay method for the quantitative determination of hypoxoside was developed. In addition, a quantitative capillary zone electrophoretic (CZE) method was developed to determine hypoxoside, specifically for its advantages over HPLC. A HPLC method was also developed and validated for the quantitative analysis of BSS, STG and STN in commercially available oral dosage forms containing AP material or extracts thereof. The antioxidant activity of an aqueous extract of lyophilized corms of AP along with hypoxoside and rooperol were investigated. In comparison with the AP extracts and also with hypoxoside, rooperol showed significant antioxidant activity. The capacity of AP, (extracts, formulations, hypoxoside and rooperol as well as sterols to inhibit in vitro metabolism of drug substrates by human cytochrome P450 (CYP) enzymes such as CYP 3A4, 3A5 and CYP19 were investigated. Samples were also assessed for their effect on drug transport proteins such as P-glycoprotein (P-gp). Various extracts of AP, AP formulations, stigmasterol and the norlignans, in particular the aglycone rooperol, exhibited inhibitory effects on CYP 3A4, 3A5 and CYP19 mediated metabolism.These results suggest that concurrent therapy with AP and other medicines, in particular antiretroviral drugs, can have important implications for safety and efficacy. Large discrepancies in marker content between AP products were found. Dissolution testing of AP products was investigated as a QC tool and the results also revealed inconsistencies between different AP products.
- Full Text:
- Date Issued: 2006
"Morality and authority in existential praxis"
- Authors: Praeg, Leonhard
- Date: 2006
- Subjects: Hooks, Bell Teacher-student relationships Education, Higher Knowledge, Sociology of Universities and colleges Educational change College teaching|xPhilosophy
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1928 , http://hdl.handle.net/10962/d1007593
- Description: In this study I am concerned with understanding how the emergence of participatory or, broadly understood, existential approaches to education has shifted the nature of the student/lecturer relationship. Historically, the difference was represented through the in loco parentis trope which contains implicit understandings as to the nature of the lecturer's authority and the ethical parameters of the relationship. With the emergence of more participatory approaches this relationship and its constitutive elements have to be re-imagined. In the first chapter I place this enquiry in the contemporary context in which the very identity of the university is changing as a result of massification and the accountability regime. In the second chapter I look at bell hooks' pedagogy as an example of such a participatory approach to education at higher education institutions. I describe her practice as a deconstructive pedagogy that is as powerful as it is because of the operation of a difference constitutive of it. In the third chapter I ask whether representing this difference in terms of the pre-modern master/apprentice offers a useful response to the questions raised by an existential praxis.
- Full Text:
- Date Issued: 2006
- Authors: Praeg, Leonhard
- Date: 2006
- Subjects: Hooks, Bell Teacher-student relationships Education, Higher Knowledge, Sociology of Universities and colleges Educational change College teaching|xPhilosophy
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1928 , http://hdl.handle.net/10962/d1007593
- Description: In this study I am concerned with understanding how the emergence of participatory or, broadly understood, existential approaches to education has shifted the nature of the student/lecturer relationship. Historically, the difference was represented through the in loco parentis trope which contains implicit understandings as to the nature of the lecturer's authority and the ethical parameters of the relationship. With the emergence of more participatory approaches this relationship and its constitutive elements have to be re-imagined. In the first chapter I place this enquiry in the contemporary context in which the very identity of the university is changing as a result of massification and the accountability regime. In the second chapter I look at bell hooks' pedagogy as an example of such a participatory approach to education at higher education institutions. I describe her practice as a deconstructive pedagogy that is as powerful as it is because of the operation of a difference constitutive of it. In the third chapter I ask whether representing this difference in terms of the pre-modern master/apprentice offers a useful response to the questions raised by an existential praxis.
- Full Text:
- Date Issued: 2006
A comparison of two township iimbongi: a literary appreciation
- Authors: Ntabeni, Jennifer Nonkoliso
- Date: 2006
- Subjects: Laudatory poetry, Xhosa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8469 , http://hdl.handle.net/10948/583 , Laudatory poetry, Xhosa
- Description: The performance of Xhosa mbongis (no correct English equivalent is available for the Xhosa bard / praise singer) is an interesting art form presentation by some individuals found in the Xhosa community. What is of interest is the fact that such artists are known to be the voices of their communities, heralding socio-cultural and historical norms and achievements. In the olden days, such figures were commonly found in the royal circles of headmen, chiefs and kings. Nowadays, urbanization has brought them into the township where they are gradually assuming different roles of not only focusing on the royal houses, but also in all community leaders as well as non-leaders of the community. Initially they used to earn their reputation through the kings or councils stages / platforms, but these days they also acquire such reputation through media and in any socio-political gatherings. They used to win awards and presents while nowadays they charge appearance fees. It is being changed into a profession albeit without any sort of academic accreditation. In the Nelson Mandela Metropolitan township, a number of such mbongis have mushroomed much against the likings of some purists cultural practitioners. The purists accuse them of being drunk with greed. Perhaps the accusation is justified and perhaps not. What is most notable is the fact that mbongis recite whenever they are asked to do so, something which is not acceptable to purists who believe that an imbongi is called forth to perform when the spirits instruct him or her to stand up and bonga. Whatever the case may be, many of such mbongis appear mostly in funerals, of known and unknown figures and so to many people, they make mockery of such a solemn talent. It is against this background that the researcher felt the need to look into this literary art-form as being presently performed by a township imbongi. The first chapter will deal with introduction, aim of study and method of research. The second chapter will provide a review of oral poetry and a poet in Xhosa writings, the nature of traditional imbongi his or her role in traditional and modern society. The third chapter will give the analysis of content, form and style of two recited poems by two different imbongis. The fourth chapter will provide a brief conclusion on how we view modern traditional imbongis and oral poetry
- Full Text:
- Date Issued: 2006
- Authors: Ntabeni, Jennifer Nonkoliso
- Date: 2006
- Subjects: Laudatory poetry, Xhosa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8469 , http://hdl.handle.net/10948/583 , Laudatory poetry, Xhosa
- Description: The performance of Xhosa mbongis (no correct English equivalent is available for the Xhosa bard / praise singer) is an interesting art form presentation by some individuals found in the Xhosa community. What is of interest is the fact that such artists are known to be the voices of their communities, heralding socio-cultural and historical norms and achievements. In the olden days, such figures were commonly found in the royal circles of headmen, chiefs and kings. Nowadays, urbanization has brought them into the township where they are gradually assuming different roles of not only focusing on the royal houses, but also in all community leaders as well as non-leaders of the community. Initially they used to earn their reputation through the kings or councils stages / platforms, but these days they also acquire such reputation through media and in any socio-political gatherings. They used to win awards and presents while nowadays they charge appearance fees. It is being changed into a profession albeit without any sort of academic accreditation. In the Nelson Mandela Metropolitan township, a number of such mbongis have mushroomed much against the likings of some purists cultural practitioners. The purists accuse them of being drunk with greed. Perhaps the accusation is justified and perhaps not. What is most notable is the fact that mbongis recite whenever they are asked to do so, something which is not acceptable to purists who believe that an imbongi is called forth to perform when the spirits instruct him or her to stand up and bonga. Whatever the case may be, many of such mbongis appear mostly in funerals, of known and unknown figures and so to many people, they make mockery of such a solemn talent. It is against this background that the researcher felt the need to look into this literary art-form as being presently performed by a township imbongi. The first chapter will deal with introduction, aim of study and method of research. The second chapter will provide a review of oral poetry and a poet in Xhosa writings, the nature of traditional imbongi his or her role in traditional and modern society. The third chapter will give the analysis of content, form and style of two recited poems by two different imbongis. The fourth chapter will provide a brief conclusion on how we view modern traditional imbongis and oral poetry
- Full Text:
- Date Issued: 2006
An investigation into employee empowerment strategies for Small, Medium, and Micro Enterprises (SMMEs)
- Authors: Pandle, Nolubabalo Leeanne
- Date: 2006
- Subjects: Employee empowerment , Business enterprises , Small business -- Management , Affirmative action programs
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9344 , http://hdl.handle.net/10948/d1012138 , Employee empowerment , Business enterprises , Small business -- Management , Affirmative action programs
- Description: Employee empowerment is a strategy that small business managers can deploy to add value to the business. This strategy is aimed at cultivating the power and ability of employees in their jobs. A business is a business by people working in it though they differ in many ways their contribution to the success of the organization is very important. However, these people are not often recognized as value contributors in the success of the business and for this reason they do not intend to add value to the business and they become demotivated to do their jobs properly. People are the business storehouse of knowledge and they are central to the organization's competitive advantage. Well educated, coached, and highly motivated people are critical to the development and execution of strategies, especially in today's fast-paced market, where top management can no longer assure the business competitiveness in isolation. In the business world, almost all businesses are doing the same, small businesses should strive to do things differently, and the only way that they can achieve that uniqueness is through instilling frankness and liberty to employees so that they act as if the business also belongs to them. The reason behind this success is the strategy the business is using to get into the heart of its customers, and this strategy is “employee empowerment”. People are the business's most underutilized resource; involvement in an organization is no longer a one-way road. In today's corporate environment a manager must work towards engaging the organization forcefully enough to achieve its objectives. New knowledge-based enterprises are characterized by flat hierarchical structures and a multi-skilled workforce. Managers assume more leadership and coaching tasks and work hard to provide employees with resources and working conditions they need to accomplish the goals they have agreed to. In brief, managers work for their staff, and not the reverse and this makes employees feel valued. Small business owners should tap into a new dimension of utilizing employee empowerment strategies in their businesses as these are proficient and are not costly. This paper investigates employee empowerment strategies that can be used by small, medium and micro enterprises (SMME's). An important reason for this investigation is that small businesses have incompetent skilled labour force due to the fact that they operate under a limited budget from which it would be difficult to get skilled workers who will demand higher salaries, as a result they need to put their energies rather on equipping and educating their employees through empowerment, which could at the end make them feel valued and part of the business. It is imperative to firstly assess the current situation of small business commitment to employee empowerment strategies; to what extent do they use employee empowerment strategies in their businesses In terms of the empirical study it was determined that small businesses were not aware of the concept of employee empowerment, but are in actual fact practicing employee empowerment strategies that have been theoretically revealed, according to the researcher’s observation, they were not aware of the impact of employee empowerment in the organization and that they can be implemented into the business. Therefore, by introducing the concept of employee empowerment and the strategies that can be used in small businesses, SMME's can enhance their services to customers, increase productivity and contribute to the welfare of employees to add value to the individual, the business and the country.
- Full Text:
- Date Issued: 2006
- Authors: Pandle, Nolubabalo Leeanne
- Date: 2006
- Subjects: Employee empowerment , Business enterprises , Small business -- Management , Affirmative action programs
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9344 , http://hdl.handle.net/10948/d1012138 , Employee empowerment , Business enterprises , Small business -- Management , Affirmative action programs
- Description: Employee empowerment is a strategy that small business managers can deploy to add value to the business. This strategy is aimed at cultivating the power and ability of employees in their jobs. A business is a business by people working in it though they differ in many ways their contribution to the success of the organization is very important. However, these people are not often recognized as value contributors in the success of the business and for this reason they do not intend to add value to the business and they become demotivated to do their jobs properly. People are the business storehouse of knowledge and they are central to the organization's competitive advantage. Well educated, coached, and highly motivated people are critical to the development and execution of strategies, especially in today's fast-paced market, where top management can no longer assure the business competitiveness in isolation. In the business world, almost all businesses are doing the same, small businesses should strive to do things differently, and the only way that they can achieve that uniqueness is through instilling frankness and liberty to employees so that they act as if the business also belongs to them. The reason behind this success is the strategy the business is using to get into the heart of its customers, and this strategy is “employee empowerment”. People are the business's most underutilized resource; involvement in an organization is no longer a one-way road. In today's corporate environment a manager must work towards engaging the organization forcefully enough to achieve its objectives. New knowledge-based enterprises are characterized by flat hierarchical structures and a multi-skilled workforce. Managers assume more leadership and coaching tasks and work hard to provide employees with resources and working conditions they need to accomplish the goals they have agreed to. In brief, managers work for their staff, and not the reverse and this makes employees feel valued. Small business owners should tap into a new dimension of utilizing employee empowerment strategies in their businesses as these are proficient and are not costly. This paper investigates employee empowerment strategies that can be used by small, medium and micro enterprises (SMME's). An important reason for this investigation is that small businesses have incompetent skilled labour force due to the fact that they operate under a limited budget from which it would be difficult to get skilled workers who will demand higher salaries, as a result they need to put their energies rather on equipping and educating their employees through empowerment, which could at the end make them feel valued and part of the business. It is imperative to firstly assess the current situation of small business commitment to employee empowerment strategies; to what extent do they use employee empowerment strategies in their businesses In terms of the empirical study it was determined that small businesses were not aware of the concept of employee empowerment, but are in actual fact practicing employee empowerment strategies that have been theoretically revealed, according to the researcher’s observation, they were not aware of the impact of employee empowerment in the organization and that they can be implemented into the business. Therefore, by introducing the concept of employee empowerment and the strategies that can be used in small businesses, SMME's can enhance their services to customers, increase productivity and contribute to the welfare of employees to add value to the individual, the business and the country.
- Full Text:
- Date Issued: 2006
A retrospective study of the problems encountered by small business owner-managers in the health sector
- Authors: O'Connell, J
- Date: 2006
- Subjects: Health facilities -- South Africa -- Business management , New business enterprises -- South Africa -- Management , Businesspeople -- South Africa Interviews
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9985 , http://hdl.handle.net/10948/429 , Health facilities -- South Africa -- Business management , New business enterprises -- South Africa -- Management , Businesspeople -- South Africa Interviews
- Description: It is estimated that the failure rate of small, medium and micro enterprises in South Africa’s (SMME’s) are between 70 percent and 80 percent. As a result, millions of rand are lost on business ventures because of essentially avoidable mistakes and problems. Difficulties encountered by small business owner-managers can be described as environmental, marketing, financial or managerial in nature. The primary objective of this study was to investigate the nature and importance of problems experience by small business owner-managers in the private health sector. The design that was used in this study was qualitative, descriptive, exploratory and contextual in nature. This study fell within the broad framework of qualitative research, as interviews were employed to do the research project (Baker, 1999:247). A purposive sample was used to identify the participants for inclusion. The target population was small business owner-managers operating within the private health sector in the Nelson Mandela Metropole. The sample comprised eight business owner-managers in the health sector within the boundaries of the Nelson Mandela Metropole, purposely identified. Before doing the empirical research, a pilot study was conducted with one small business owner-manager that fulfilled the required criteria of the research population. Data was collected by means of naïve sketches and semi-structured interviews. Data was analyzed according to the framework provided by Tesch (in Creswell, 1994). Guba’s model (in Krefting, 1991) was employed for data verification. Interviews were conducted in both Afrikaans and English. iii Direct transcriptions from the tape-recorded interviews ensured that all data was gathered and saved for reference when needed during the data analysis as described by Field and Morse (1996:64). The researcher took observational, theoretical, methodological and personal notes as described in Wilson (1989: 433-435). Transcriptions from sketches and interviews served as the database for the study. Only literature pertaining to the research process was consulted prior to the data collection of the primary data, in order to establish an effective research format. The problems experienced by small business owner-managers in the health sector were discussed under four major themes and several sub-themes identified by the researcher and the independent coder. The main themes that emerged from the study were: small business ownermanagers in the health sector lacked business skills and experience; had financial problems regarding their businesses; had difficulty building a customer base; and were uncertain in terms of their businesses’ future. Conclusions were drawn from the findings of the study and limiting factors were identified and acknowledged in the report. Recommendations that could assist practitioners, educators and trainers were suggested.
- Full Text:
- Date Issued: 2006
- Authors: O'Connell, J
- Date: 2006
- Subjects: Health facilities -- South Africa -- Business management , New business enterprises -- South Africa -- Management , Businesspeople -- South Africa Interviews
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9985 , http://hdl.handle.net/10948/429 , Health facilities -- South Africa -- Business management , New business enterprises -- South Africa -- Management , Businesspeople -- South Africa Interviews
- Description: It is estimated that the failure rate of small, medium and micro enterprises in South Africa’s (SMME’s) are between 70 percent and 80 percent. As a result, millions of rand are lost on business ventures because of essentially avoidable mistakes and problems. Difficulties encountered by small business owner-managers can be described as environmental, marketing, financial or managerial in nature. The primary objective of this study was to investigate the nature and importance of problems experience by small business owner-managers in the private health sector. The design that was used in this study was qualitative, descriptive, exploratory and contextual in nature. This study fell within the broad framework of qualitative research, as interviews were employed to do the research project (Baker, 1999:247). A purposive sample was used to identify the participants for inclusion. The target population was small business owner-managers operating within the private health sector in the Nelson Mandela Metropole. The sample comprised eight business owner-managers in the health sector within the boundaries of the Nelson Mandela Metropole, purposely identified. Before doing the empirical research, a pilot study was conducted with one small business owner-manager that fulfilled the required criteria of the research population. Data was collected by means of naïve sketches and semi-structured interviews. Data was analyzed according to the framework provided by Tesch (in Creswell, 1994). Guba’s model (in Krefting, 1991) was employed for data verification. Interviews were conducted in both Afrikaans and English. iii Direct transcriptions from the tape-recorded interviews ensured that all data was gathered and saved for reference when needed during the data analysis as described by Field and Morse (1996:64). The researcher took observational, theoretical, methodological and personal notes as described in Wilson (1989: 433-435). Transcriptions from sketches and interviews served as the database for the study. Only literature pertaining to the research process was consulted prior to the data collection of the primary data, in order to establish an effective research format. The problems experienced by small business owner-managers in the health sector were discussed under four major themes and several sub-themes identified by the researcher and the independent coder. The main themes that emerged from the study were: small business ownermanagers in the health sector lacked business skills and experience; had financial problems regarding their businesses; had difficulty building a customer base; and were uncertain in terms of their businesses’ future. Conclusions were drawn from the findings of the study and limiting factors were identified and acknowledged in the report. Recommendations that could assist practitioners, educators and trainers were suggested.
- Full Text:
- Date Issued: 2006
An investigation into the neuroprotective effects of estrogen and progesterone in a model of homocysteine-induced neurodegeration
- Authors: Wu, Wing Man
- Date: 2006
- Subjects: Homocysteine , Estrogen , Estrogen -- Therapeutic use , Progesterone , Hormone receptors , Methyl aspartate , Oxidative stress , Alzheimer's disease -- Treatment , Nervous system -- Degeneration -- Prevention
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3806 , http://hdl.handle.net/10962/d1003284 , Homocysteine , Estrogen , Estrogen -- Therapeutic use , Progesterone , Hormone receptors , Methyl aspartate , Oxidative stress , Alzheimer's disease -- Treatment , Nervous system -- Degeneration -- Prevention
- Description: Homocysteine (Hcy) is a sulfur containing amino acid and is a potent neurotoxin. It has been shown that elevated levels of Hcy, termed hyperhomocysteinemia, plays a role in the pathologies of Alzheimer’s disease (AD) and age-related cognitive decline. Hcy is a glutamate agonist, which causes in increase in Ca[superscript (2+)] influx via the activation of NMDA class of excitatory amino acid receptors, which results in neuronal cell death and apoptosis. Estrogen and progesterone are female hormones that are responsible for reproduction and maternal behaviour. However, in the last decade, it is evident that both female hormones have neuroprotective properties in many animal models of neurodegeneration. Collectively, both estrogen and progesterone reduce the consequences of the oxidative stress by enhancing the antioxidant defence mechanisms, reducing excitotoxicity by altering glutamate receptor activity and reducing the damage caused by lipid peroxidation. However, the mechanisms by which estrogen and progesterone provide such neuroprotection probably depend on the type and concentration of hormone present. Moreover, numerous studies have shown that hormone replacement therapy (HRT, estrogen and progestins) or estrogen-only replacement therapy (ERT) may prevent or delay the onset of AD and improve cognition for women with AD. Clinical trials have also shown that women taking HRT may modify the effects of Hcy levels on cognitive functioning. Oxidative stress increases in the aging brain and thus has a powerful effect on enhanced susceptibility to neurodegenerative disease. The detection and measurement of lipid peroxidation and superoxide anion radicals in the brain tissue supports the involvement of free radical reactions in neurotoxicity and in neurodegenerative disorders. The hippocampus is an important region of the brain responsible for the formation of memory. However, agents that induce stress in this area have harmful effects and could lead to dementia. This study aims to investigate and clarify the neuroprotective effects of estrogen and progesterone, using Hcy-induced neurodegenerative models. The initial studies demonstrate that estrogen and progesterone have the ability to scavenge potent free radicals. Histological studies undertaken reveal that both estrogen and progesterone protect against Hcy-induced neuronal cell death. In addition, immunohistochemical investigations show that Hcy-induced apoptosis in the hippocampus can be inhibited by both estrogen and progesterone. However, estrogen also acts at the NMDA receptor as an agonist, while progesterone blocks at the NMDA receptor. These mechanisms reduce the ability of Hcy to cause damage to neurons, since Hcy-induced neurotoxicity is dependent on the overstimulation of the NMDA receptor. SOD and GPx are important enzymatic antioxidants which can react with ROS and neutralize them before these inflict damage in the brain. Hcy can increase oxidative stress by inhibiting expression and function of these antioxidants. However, it has been shown that the antioxidant abilities of both estrogen and progesterone can up-regulate the activities of SOD and GPx. These results provide further evidence that estrogen and progesterone act as antioxidants and are free radical scavengers. The discovery of neuroprotective agents is becoming important as accumulating evidence indicates the protective role of both estrogen and progesterone in Hcy-induced neurodegeneration. Thus further work in clinical trials is needed to examine whether reducing Hcy levels with HRT can become the treatment of neurodegenerative disorders, such as Alzheimer’s disease.
- Full Text:
- Date Issued: 2006
- Authors: Wu, Wing Man
- Date: 2006
- Subjects: Homocysteine , Estrogen , Estrogen -- Therapeutic use , Progesterone , Hormone receptors , Methyl aspartate , Oxidative stress , Alzheimer's disease -- Treatment , Nervous system -- Degeneration -- Prevention
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3806 , http://hdl.handle.net/10962/d1003284 , Homocysteine , Estrogen , Estrogen -- Therapeutic use , Progesterone , Hormone receptors , Methyl aspartate , Oxidative stress , Alzheimer's disease -- Treatment , Nervous system -- Degeneration -- Prevention
- Description: Homocysteine (Hcy) is a sulfur containing amino acid and is a potent neurotoxin. It has been shown that elevated levels of Hcy, termed hyperhomocysteinemia, plays a role in the pathologies of Alzheimer’s disease (AD) and age-related cognitive decline. Hcy is a glutamate agonist, which causes in increase in Ca[superscript (2+)] influx via the activation of NMDA class of excitatory amino acid receptors, which results in neuronal cell death and apoptosis. Estrogen and progesterone are female hormones that are responsible for reproduction and maternal behaviour. However, in the last decade, it is evident that both female hormones have neuroprotective properties in many animal models of neurodegeneration. Collectively, both estrogen and progesterone reduce the consequences of the oxidative stress by enhancing the antioxidant defence mechanisms, reducing excitotoxicity by altering glutamate receptor activity and reducing the damage caused by lipid peroxidation. However, the mechanisms by which estrogen and progesterone provide such neuroprotection probably depend on the type and concentration of hormone present. Moreover, numerous studies have shown that hormone replacement therapy (HRT, estrogen and progestins) or estrogen-only replacement therapy (ERT) may prevent or delay the onset of AD and improve cognition for women with AD. Clinical trials have also shown that women taking HRT may modify the effects of Hcy levels on cognitive functioning. Oxidative stress increases in the aging brain and thus has a powerful effect on enhanced susceptibility to neurodegenerative disease. The detection and measurement of lipid peroxidation and superoxide anion radicals in the brain tissue supports the involvement of free radical reactions in neurotoxicity and in neurodegenerative disorders. The hippocampus is an important region of the brain responsible for the formation of memory. However, agents that induce stress in this area have harmful effects and could lead to dementia. This study aims to investigate and clarify the neuroprotective effects of estrogen and progesterone, using Hcy-induced neurodegenerative models. The initial studies demonstrate that estrogen and progesterone have the ability to scavenge potent free radicals. Histological studies undertaken reveal that both estrogen and progesterone protect against Hcy-induced neuronal cell death. In addition, immunohistochemical investigations show that Hcy-induced apoptosis in the hippocampus can be inhibited by both estrogen and progesterone. However, estrogen also acts at the NMDA receptor as an agonist, while progesterone blocks at the NMDA receptor. These mechanisms reduce the ability of Hcy to cause damage to neurons, since Hcy-induced neurotoxicity is dependent on the overstimulation of the NMDA receptor. SOD and GPx are important enzymatic antioxidants which can react with ROS and neutralize them before these inflict damage in the brain. Hcy can increase oxidative stress by inhibiting expression and function of these antioxidants. However, it has been shown that the antioxidant abilities of both estrogen and progesterone can up-regulate the activities of SOD and GPx. These results provide further evidence that estrogen and progesterone act as antioxidants and are free radical scavengers. The discovery of neuroprotective agents is becoming important as accumulating evidence indicates the protective role of both estrogen and progesterone in Hcy-induced neurodegeneration. Thus further work in clinical trials is needed to examine whether reducing Hcy levels with HRT can become the treatment of neurodegenerative disorders, such as Alzheimer’s disease.
- Full Text:
- Date Issued: 2006
The application of integrated environmental management to improve storm water quality and reduce marine pollution at Jeffreys Bay (South Africa)
- Authors: Seebach, Rudi Dieter
- Date: 2006
- Subjects: Marine pollution -- South Africa -- Jeffreys Bay , Storm sewers -- South Africa -- Jeffreys Bay , Marine ecology -- South Africa -- Jeffreys Bay , Environmental management -- South Africa -- Jeffreys Bay , Environmental risk assessment -- South Africa -- Jeffreys Bay , Community development -- South Africa -- Jeffreys Bay , Sustainable development -- South Africa -- Jeffreys Bay , Sewage disposal -- South Africa -- Jeffreys Bay
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4738 , http://hdl.handle.net/10962/d1005287 , Marine pollution -- South Africa -- Jeffreys Bay , Storm sewers -- South Africa -- Jeffreys Bay , Marine ecology -- South Africa -- Jeffreys Bay , Environmental management -- South Africa -- Jeffreys Bay , Environmental risk assessment -- South Africa -- Jeffreys Bay , Community development -- South Africa -- Jeffreys Bay , Sustainable development -- South Africa -- Jeffreys Bay , Sewage disposal -- South Africa -- Jeffreys Bay
- Description: It is projected that by 2025 three-quarters of the world’s population will live in the coastal zone. This is an alarming statistic, with a consequently significant impact on small coastal towns and the adjacent marine environments. Developing communities within the coastal zone of South Africa have proved to be a significant pollution source of storm water. Studies have shown that storm water that is deposited in the ocean will be trapped in the near shore marine environment causing poor seawater quality over a large distance. Furthermore, this can pose a significant threat to the health of recreational users and important marine ecosystems. In Jeffreys Bay storm water quality is thought to pose a threat to the maintenance of the international Blue Flag status for its beach. The aim of the current project was to investigate the main sources of storm water and subsequent marine pollution at Jeffreys Bay and to develop an appropriate management strategy using the integrated environmental management framework. In order to achieve this objective, it was also necessary to determine the current quality of water at various points within the catchment and near shore marine environment. Even though the storm water was found to be severely contaminated no evidence existed for a negative impact on the marine environment. None the less, a precautionary approach was adopted and a risk assessment employed in order to consider potential impacts on the marine and aquatic environment, human health and socio-economic welfare within the town. Significant sources of storm water contamination included grey water, domestic solid waste disposal and informal ablution. These significant aspects were investigated further and it was found that solid waste management in the catchment was poor with significant quantities of waste, primarily (76%) from domestic sources, being disposed of illegally. A study of sanitation management showed inadequacies where up to 58% of the residents from the informal settlements disposed of their grey water into open spaces. The ratio of residents to toilets in these areas was 28:1, therefore supporting the outcome of the risk assessment. Due to the fact that all the significant aspects were related to anthropogenic waste, an integrated waste management plan (IWMP) was developed that would not only facilitate the reduction of pollution of storm water, but would also allow for sustainable community-based development.
- Full Text:
- Date Issued: 2006
- Authors: Seebach, Rudi Dieter
- Date: 2006
- Subjects: Marine pollution -- South Africa -- Jeffreys Bay , Storm sewers -- South Africa -- Jeffreys Bay , Marine ecology -- South Africa -- Jeffreys Bay , Environmental management -- South Africa -- Jeffreys Bay , Environmental risk assessment -- South Africa -- Jeffreys Bay , Community development -- South Africa -- Jeffreys Bay , Sustainable development -- South Africa -- Jeffreys Bay , Sewage disposal -- South Africa -- Jeffreys Bay
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4738 , http://hdl.handle.net/10962/d1005287 , Marine pollution -- South Africa -- Jeffreys Bay , Storm sewers -- South Africa -- Jeffreys Bay , Marine ecology -- South Africa -- Jeffreys Bay , Environmental management -- South Africa -- Jeffreys Bay , Environmental risk assessment -- South Africa -- Jeffreys Bay , Community development -- South Africa -- Jeffreys Bay , Sustainable development -- South Africa -- Jeffreys Bay , Sewage disposal -- South Africa -- Jeffreys Bay
- Description: It is projected that by 2025 three-quarters of the world’s population will live in the coastal zone. This is an alarming statistic, with a consequently significant impact on small coastal towns and the adjacent marine environments. Developing communities within the coastal zone of South Africa have proved to be a significant pollution source of storm water. Studies have shown that storm water that is deposited in the ocean will be trapped in the near shore marine environment causing poor seawater quality over a large distance. Furthermore, this can pose a significant threat to the health of recreational users and important marine ecosystems. In Jeffreys Bay storm water quality is thought to pose a threat to the maintenance of the international Blue Flag status for its beach. The aim of the current project was to investigate the main sources of storm water and subsequent marine pollution at Jeffreys Bay and to develop an appropriate management strategy using the integrated environmental management framework. In order to achieve this objective, it was also necessary to determine the current quality of water at various points within the catchment and near shore marine environment. Even though the storm water was found to be severely contaminated no evidence existed for a negative impact on the marine environment. None the less, a precautionary approach was adopted and a risk assessment employed in order to consider potential impacts on the marine and aquatic environment, human health and socio-economic welfare within the town. Significant sources of storm water contamination included grey water, domestic solid waste disposal and informal ablution. These significant aspects were investigated further and it was found that solid waste management in the catchment was poor with significant quantities of waste, primarily (76%) from domestic sources, being disposed of illegally. A study of sanitation management showed inadequacies where up to 58% of the residents from the informal settlements disposed of their grey water into open spaces. The ratio of residents to toilets in these areas was 28:1, therefore supporting the outcome of the risk assessment. Due to the fact that all the significant aspects were related to anthropogenic waste, an integrated waste management plan (IWMP) was developed that would not only facilitate the reduction of pollution of storm water, but would also allow for sustainable community-based development.
- Full Text:
- Date Issued: 2006
Studies of equivalent fuzzy subgroups of finite abelian p-Groups of rank two and their subgroup lattices
- Authors: Ngcibi, Sakhile Leonard
- Date: 2006
- Subjects: Abelian groups Fuzzy sets Finite groups Group theory Polynomials
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5416 , http://hdl.handle.net/10962/d1005230
- Description: We determine the number and nature of distinct equivalence classes of fuzzy subgroups of finite Abelian p-group G of rank two under a natural equivalence relation on fuzzy subgroups. Our discussions embrace the necessary theory from groups with special emphasis on finite p-groups as a step towards the classification of crisp subgroups as well as maximal chains of subgroups. Unique naming of subgroup generators as discussed in this work facilitates counting of subgroups and chains of subgroups from subgroup lattices of the groups. We cover aspects of fuzzy theory including fuzzy (homo-) isomorphism together with operations on fuzzy subgroups. The equivalence characterization as discussed here is finer than isomorphism. We introduce the theory of keychains with a view towards the enumeration of maximal chains as well as fuzzy subgroups under the equivalence relation mentioned above. We discuss a strategy to develop subgroup lattices of the groups used in the discussion, and give examples for specific cases of prime p and positive integers n,m. We derive formulas for both the number of maximal chains as well as the number of distinct equivalence classes of fuzzy subgroups. The results are in the form of polynomials in p (known in the literature as Hall polynomials) with combinatorial coefficients. Finally we give a brief investigation of the results from a graph-theoretic point of view. We view the subgroup lattices of these groups as simple, connected, symmetric graphs.
- Full Text:
- Date Issued: 2006
- Authors: Ngcibi, Sakhile Leonard
- Date: 2006
- Subjects: Abelian groups Fuzzy sets Finite groups Group theory Polynomials
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5416 , http://hdl.handle.net/10962/d1005230
- Description: We determine the number and nature of distinct equivalence classes of fuzzy subgroups of finite Abelian p-group G of rank two under a natural equivalence relation on fuzzy subgroups. Our discussions embrace the necessary theory from groups with special emphasis on finite p-groups as a step towards the classification of crisp subgroups as well as maximal chains of subgroups. Unique naming of subgroup generators as discussed in this work facilitates counting of subgroups and chains of subgroups from subgroup lattices of the groups. We cover aspects of fuzzy theory including fuzzy (homo-) isomorphism together with operations on fuzzy subgroups. The equivalence characterization as discussed here is finer than isomorphism. We introduce the theory of keychains with a view towards the enumeration of maximal chains as well as fuzzy subgroups under the equivalence relation mentioned above. We discuss a strategy to develop subgroup lattices of the groups used in the discussion, and give examples for specific cases of prime p and positive integers n,m. We derive formulas for both the number of maximal chains as well as the number of distinct equivalence classes of fuzzy subgroups. The results are in the form of polynomials in p (known in the literature as Hall polynomials) with combinatorial coefficients. Finally we give a brief investigation of the results from a graph-theoretic point of view. We view the subgroup lattices of these groups as simple, connected, symmetric graphs.
- Full Text:
- Date Issued: 2006
An evaluation of the Nelson Mandela Metropole as a location to attract investment
- Authors: Nonxuba, Philile Zipho
- Date: 2006
- Subjects: Nelson Mandela Metropolitan Municipality (Eastern Cape, South Africa) , Nelson Mandela Metropolitan Municipality (Eastern Cape, South Africa) -- Economic conditions , Economic development -- South Africa -- Eastern Cape , Manufacturing industries -- South Africa -- Eastern Cape , Business enterprises -- South Africa -- Eastern Cape , Investments -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:973 , http://hdl.handle.net/10962/d1002707 , Nelson Mandela Metropolitan Municipality (Eastern Cape, South Africa) , Nelson Mandela Metropolitan Municipality (Eastern Cape, South Africa) -- Economic conditions , Economic development -- South Africa -- Eastern Cape , Manufacturing industries -- South Africa -- Eastern Cape , Business enterprises -- South Africa -- Eastern Cape , Investments -- South Africa -- Eastern Cape
- Description: The Nelson Mandela Metropole is the largest contributor to the Eastern Cape Province’s economy and its share of the production of the Eastern Cape is about 41, 3 % per annum. This requires that the competitiveness of the Metropole be improved in order to enable it to meet the challenges of the Province. The objective of the GEAR policy strategy places a focus on the leading coastal industrial locations of South Africa. Furthermore, the national government has shifted the responsibility of service delivery to local governments in an effort to reinforce the integrated development planning process in municipalities. To meet those challenges, the Metropole has focused its attention on improving local resources. To enhance the performance of the manufacturing industry of the Metropole, it is necessary to ensure that the Metropole has locational attributes to attract new investment. Such attributes include creation of closely located industries. This will help the firms to engage in competition as well as engage in co-operative activities among themselves. The study employs a variety of theories to highlight the need to enhance productivity of industries in order to attract new investment. These theories include the new (endogenous) growth theory that argues that productivity growth is determined by introduction of new technologies. Such technologies accrue because ideas that contribute to their development are nonrival, and thus their creation has a fixed cost and zero marginal cost. The property of fixed cost in the creation of ideas results in the emergence of increasing returns to scale. The Porter’s Diamond framework is used in the study to take the issue of productivity growth further. Its thrust is that in particular nations some industries experience high productivity growth rates. It further argues that the locational attributes are responsible for these industries in registering high productivity growth levels. These attributes include the creation of advanced resources such as a skilled labour force. The data obtained from the survey of the research on the manufacturing industries forms part of this study. The findings of the survey reveal that although the manufacturing sector of the South African region has registered some significant success, there is still some room for improving its competitiveness. It revealed that development of the local markets through competition and cooperation among the industries would help to render these industries internationally competitive. This study concludes with some recommendations. These recommendations place emphasis on improvement of infrastructure, quality of labour force, and development of the region’s market. In order to carry out the recommendations effectively, government policy has to be repositioned so as to enhance its visibility among the stakeholders in the economy. Of importance is to ensure the promotion of policy that supports geographically concentrated businesses.
- Full Text:
- Date Issued: 2006
- Authors: Nonxuba, Philile Zipho
- Date: 2006
- Subjects: Nelson Mandela Metropolitan Municipality (Eastern Cape, South Africa) , Nelson Mandela Metropolitan Municipality (Eastern Cape, South Africa) -- Economic conditions , Economic development -- South Africa -- Eastern Cape , Manufacturing industries -- South Africa -- Eastern Cape , Business enterprises -- South Africa -- Eastern Cape , Investments -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:973 , http://hdl.handle.net/10962/d1002707 , Nelson Mandela Metropolitan Municipality (Eastern Cape, South Africa) , Nelson Mandela Metropolitan Municipality (Eastern Cape, South Africa) -- Economic conditions , Economic development -- South Africa -- Eastern Cape , Manufacturing industries -- South Africa -- Eastern Cape , Business enterprises -- South Africa -- Eastern Cape , Investments -- South Africa -- Eastern Cape
- Description: The Nelson Mandela Metropole is the largest contributor to the Eastern Cape Province’s economy and its share of the production of the Eastern Cape is about 41, 3 % per annum. This requires that the competitiveness of the Metropole be improved in order to enable it to meet the challenges of the Province. The objective of the GEAR policy strategy places a focus on the leading coastal industrial locations of South Africa. Furthermore, the national government has shifted the responsibility of service delivery to local governments in an effort to reinforce the integrated development planning process in municipalities. To meet those challenges, the Metropole has focused its attention on improving local resources. To enhance the performance of the manufacturing industry of the Metropole, it is necessary to ensure that the Metropole has locational attributes to attract new investment. Such attributes include creation of closely located industries. This will help the firms to engage in competition as well as engage in co-operative activities among themselves. The study employs a variety of theories to highlight the need to enhance productivity of industries in order to attract new investment. These theories include the new (endogenous) growth theory that argues that productivity growth is determined by introduction of new technologies. Such technologies accrue because ideas that contribute to their development are nonrival, and thus their creation has a fixed cost and zero marginal cost. The property of fixed cost in the creation of ideas results in the emergence of increasing returns to scale. The Porter’s Diamond framework is used in the study to take the issue of productivity growth further. Its thrust is that in particular nations some industries experience high productivity growth rates. It further argues that the locational attributes are responsible for these industries in registering high productivity growth levels. These attributes include the creation of advanced resources such as a skilled labour force. The data obtained from the survey of the research on the manufacturing industries forms part of this study. The findings of the survey reveal that although the manufacturing sector of the South African region has registered some significant success, there is still some room for improving its competitiveness. It revealed that development of the local markets through competition and cooperation among the industries would help to render these industries internationally competitive. This study concludes with some recommendations. These recommendations place emphasis on improvement of infrastructure, quality of labour force, and development of the region’s market. In order to carry out the recommendations effectively, government policy has to be repositioned so as to enhance its visibility among the stakeholders in the economy. Of importance is to ensure the promotion of policy that supports geographically concentrated businesses.
- Full Text:
- Date Issued: 2006
A critical investigation of the effectiveness of warm-ups as technical exercises for the improvement of choral tone : a case study of the Eastern Cape Children's Choir
- Authors: Van Zyl, Lionel
- Date: 2006
- Subjects: Choral singing Studies and exercises , Choral singing -- Instruction and study , Music rehearsals
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:8513 , http://hdl.handle.net/10948/634 , Choral singing Studies and exercises , Choral singing -- Instruction and study , Music rehearsals
- Description: This is a research project based on the author’s experience of more than 20 years as conductor of the Eastern Cape Childrens Choir. It investigates the effectiveness of technical exercises - with special reference to selected “warm-up” exercises - in creating a superior choral tone in the children’s choir. The investigation is motivated by the fact that it is an ongoing challenge to effectively overcome problems with intonation and poor choral tone, problems which are mostly caused by lack of attention to pure vowel formation. Toward this end, a practical “tool box” of vocal exercises for the children’s choir is ultimately proposed. The toolbox is based on one single exercise with different variations. Each variation is designed to address multiple vocal needs and to correct vocal production during singing. In this manner a great many technical aspects are covered with the simplest of means and in the shortest possible time, bearing in mind that the rehearsal session allows limited time to focus on such matters to the exclusion of all else.
- Full Text:
- Date Issued: 2006
- Authors: Van Zyl, Lionel
- Date: 2006
- Subjects: Choral singing Studies and exercises , Choral singing -- Instruction and study , Music rehearsals
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:8513 , http://hdl.handle.net/10948/634 , Choral singing Studies and exercises , Choral singing -- Instruction and study , Music rehearsals
- Description: This is a research project based on the author’s experience of more than 20 years as conductor of the Eastern Cape Childrens Choir. It investigates the effectiveness of technical exercises - with special reference to selected “warm-up” exercises - in creating a superior choral tone in the children’s choir. The investigation is motivated by the fact that it is an ongoing challenge to effectively overcome problems with intonation and poor choral tone, problems which are mostly caused by lack of attention to pure vowel formation. Toward this end, a practical “tool box” of vocal exercises for the children’s choir is ultimately proposed. The toolbox is based on one single exercise with different variations. Each variation is designed to address multiple vocal needs and to correct vocal production during singing. In this manner a great many technical aspects are covered with the simplest of means and in the shortest possible time, bearing in mind that the rehearsal session allows limited time to focus on such matters to the exclusion of all else.
- Full Text:
- Date Issued: 2006
An assessment of the supplier development practices at Volkswagen of South Africa
- Authors: Erasmus, Bradley Quentin
- Date: 2006
- Subjects: Volkswagen of South Africa (Firm) , Production management , Business logistics -- Management , Motor vehicle industry -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8555 , http://hdl.handle.net/10948/500 , Volkswagen of South Africa (Firm) , Production management , Business logistics -- Management , Motor vehicle industry -- South Africa
- Description: The underlying objective of the research is to assess the nature of the supplier training at Volkswagen of South Africa (VWSA). To achieve this objective, a theoretical study was conducted to establish what literature reveals to be the most important theory of supply chain management as well as supplier development geared towards lean manufacturing. The information obtained in the literature study was analysed to solve the main problem namely, an assessment of the nature of the supplier training at Volkswagen of South Africa (VWSA). The research was divided into two questionnaires: The first questionnaire is targeted at the suppliers. This questionnaire has two sections namely section A, the biographical data and section B attempts to determine the quality systems and manufacturing requirements. It further attempts to gauge training support and needs as compared to other OEM’s. The second questionnaire is targeted at the Supplier Development Manager. The aim of this questionnaire is to establish what the current training offerings are, the source of what VWSA teachers and the awareness of the Toyota Training College.
- Full Text:
- Date Issued: 2006
- Authors: Erasmus, Bradley Quentin
- Date: 2006
- Subjects: Volkswagen of South Africa (Firm) , Production management , Business logistics -- Management , Motor vehicle industry -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8555 , http://hdl.handle.net/10948/500 , Volkswagen of South Africa (Firm) , Production management , Business logistics -- Management , Motor vehicle industry -- South Africa
- Description: The underlying objective of the research is to assess the nature of the supplier training at Volkswagen of South Africa (VWSA). To achieve this objective, a theoretical study was conducted to establish what literature reveals to be the most important theory of supply chain management as well as supplier development geared towards lean manufacturing. The information obtained in the literature study was analysed to solve the main problem namely, an assessment of the nature of the supplier training at Volkswagen of South Africa (VWSA). The research was divided into two questionnaires: The first questionnaire is targeted at the suppliers. This questionnaire has two sections namely section A, the biographical data and section B attempts to determine the quality systems and manufacturing requirements. It further attempts to gauge training support and needs as compared to other OEM’s. The second questionnaire is targeted at the Supplier Development Manager. The aim of this questionnaire is to establish what the current training offerings are, the source of what VWSA teachers and the awareness of the Toyota Training College.
- Full Text:
- Date Issued: 2006
Eksperiment en intertekstualiteit: 'n studie van Ingrid Winterbach se Niggie (2002) en die oorlogsdagboek van Jan F.E. Celliers 1899-1902 (1978), asook ander Anglo-Boereoorlog tekste
- Authors: Botha, Maria Elizabeth
- Date: 2006
- Subjects: Afrikaans fiction -- History and criticism , Winterbach, Ingrid. Niggie , Intertextuality , South African War, 1899-1902 Fiction
- Language: Afrikaans
- Type: Thesis , Masters , MA
- Identifier: vital:8442 , http://hdl.handle.net/10948/436 , Afrikaans fiction -- History and criticism , Winterbach, Ingrid. Niggie , Intertextuality , South African War, 1899-1902 Fiction
- Description: This study focuses on the creative adaptation of Anglo-Boer War material in Ingrid Winterbach’s (Lettie Viljoen) Niggie [Cousin] (2002) with specific reference to the Oorlogsdagboek van Jan F.E. Celliers, 1899-1902 [War Diary of Jan F.E. Celliers, 1899-1902] (1978) and other texts written during or shortly after the Anglo Boer War in Dutch, such as Totius’ Vier-en-sestig dae te velde: ‘n Oorlogsdagboek [Sixty Four Days Afield: A War Diary] (1977) and in English, Woman’s Endurance (1904) by A.D.L. and Deneys Reitz’s Commando. A Boer Journal of the Boer War (1929). More recent Afrikaans novels dealing with the same war are also analysed, such as Ons oorlog [Our War] (2000) by Klaas Steytler, Op soek na Generaal Mannetjies Mentz [In Search of General Mannetjies Mentz] (1998) by Christoffel Coetzee and Etienne Leroux’s Magersfontein O! Magersfontein (1976). A literary analysis is done of the novel Niggie, with specific focus on the nature and function of Anglo-Boer War material in Winterbach’s text. The question is posed why there is such a sustained focus and creative adaptation of Anglo-Boer War texts in Winterbach’s oeuvre (especially in Belemmering [Impediment], 1990, Karolina Ferreira, 1993, Buller se plan [Buller’s Plan], 1999, and Niggie [Cousin], 2002)? This novel has a profound effect on the reader a century after the war, because it addresses postcolonial issues and predicaments such as a defragmenting identity, as well as the possible demise of the Afrikaans language and culture, faced by the descendants of those involved in the war a century ago. In her reworking of the past to come to grips with the present, Winterbach confronts difficult South African topics, such as interracial relationships, racism, the relationship with the land, possible language death, gender relationships, the role of the supernatural and the unconscious in everyday life (in the form of dreams and trickster figures), amongst many others. The dissertation offers an intertextual study as well as a literary analyses of the literary techniques used, and the characteristics of this magisterial novel, which deservedly won the Hertzog prize in 2004, the highest accolade possible for an Afrikaans novel. The anomaly of such a novel in 2002 seemingly dwelling on the past, is shown up for what it is: a metaphor for the present and its dilemmas, reflecting the social conflicts existing at present in the crumbling Afrikaans community.
- Full Text:
- Date Issued: 2006
- Authors: Botha, Maria Elizabeth
- Date: 2006
- Subjects: Afrikaans fiction -- History and criticism , Winterbach, Ingrid. Niggie , Intertextuality , South African War, 1899-1902 Fiction
- Language: Afrikaans
- Type: Thesis , Masters , MA
- Identifier: vital:8442 , http://hdl.handle.net/10948/436 , Afrikaans fiction -- History and criticism , Winterbach, Ingrid. Niggie , Intertextuality , South African War, 1899-1902 Fiction
- Description: This study focuses on the creative adaptation of Anglo-Boer War material in Ingrid Winterbach’s (Lettie Viljoen) Niggie [Cousin] (2002) with specific reference to the Oorlogsdagboek van Jan F.E. Celliers, 1899-1902 [War Diary of Jan F.E. Celliers, 1899-1902] (1978) and other texts written during or shortly after the Anglo Boer War in Dutch, such as Totius’ Vier-en-sestig dae te velde: ‘n Oorlogsdagboek [Sixty Four Days Afield: A War Diary] (1977) and in English, Woman’s Endurance (1904) by A.D.L. and Deneys Reitz’s Commando. A Boer Journal of the Boer War (1929). More recent Afrikaans novels dealing with the same war are also analysed, such as Ons oorlog [Our War] (2000) by Klaas Steytler, Op soek na Generaal Mannetjies Mentz [In Search of General Mannetjies Mentz] (1998) by Christoffel Coetzee and Etienne Leroux’s Magersfontein O! Magersfontein (1976). A literary analysis is done of the novel Niggie, with specific focus on the nature and function of Anglo-Boer War material in Winterbach’s text. The question is posed why there is such a sustained focus and creative adaptation of Anglo-Boer War texts in Winterbach’s oeuvre (especially in Belemmering [Impediment], 1990, Karolina Ferreira, 1993, Buller se plan [Buller’s Plan], 1999, and Niggie [Cousin], 2002)? This novel has a profound effect on the reader a century after the war, because it addresses postcolonial issues and predicaments such as a defragmenting identity, as well as the possible demise of the Afrikaans language and culture, faced by the descendants of those involved in the war a century ago. In her reworking of the past to come to grips with the present, Winterbach confronts difficult South African topics, such as interracial relationships, racism, the relationship with the land, possible language death, gender relationships, the role of the supernatural and the unconscious in everyday life (in the form of dreams and trickster figures), amongst many others. The dissertation offers an intertextual study as well as a literary analyses of the literary techniques used, and the characteristics of this magisterial novel, which deservedly won the Hertzog prize in 2004, the highest accolade possible for an Afrikaans novel. The anomaly of such a novel in 2002 seemingly dwelling on the past, is shown up for what it is: a metaphor for the present and its dilemmas, reflecting the social conflicts existing at present in the crumbling Afrikaans community.
- Full Text:
- Date Issued: 2006
Pricing exotic options using C++
- Authors: Nhongo, Tawuya D R
- Date: 2007
- Subjects: C++ (Computer program language) , Monte Carlo method , Simulation methods , Options (Finance) -- Mathematical models , Pricing -- Mathematical models
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5577 , http://hdl.handle.net/10962/d1008373 , C++ (Computer program language) , Monte Carlo method , Simulation methods , Options (Finance) -- Mathematical models , Pricing -- Mathematical models
- Description: This document demonstrates the use of the C++ programming language as a simulation tool in the efficient pricing of exotic European options. Extensions to the basic problem of simulation pricing are undertaken including variance reduction by conditional expectation, control and antithetic variates. Ultimately we were able to produce a modularized, easily extend-able program which effectively makes use of Monte Carlo simulation techniques to price lookback, Asian and barrier exotic options. Theories of variance reduction were validated except in cases where we used control variates in combination with the other variance reduction techniques in which case we observed increased variance. Again, the main aim of this half thesis was to produce a C++ program which would produce stable pricings of exotic options.
- Full Text:
- Date Issued: 2007
- Authors: Nhongo, Tawuya D R
- Date: 2007
- Subjects: C++ (Computer program language) , Monte Carlo method , Simulation methods , Options (Finance) -- Mathematical models , Pricing -- Mathematical models
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5577 , http://hdl.handle.net/10962/d1008373 , C++ (Computer program language) , Monte Carlo method , Simulation methods , Options (Finance) -- Mathematical models , Pricing -- Mathematical models
- Description: This document demonstrates the use of the C++ programming language as a simulation tool in the efficient pricing of exotic European options. Extensions to the basic problem of simulation pricing are undertaken including variance reduction by conditional expectation, control and antithetic variates. Ultimately we were able to produce a modularized, easily extend-able program which effectively makes use of Monte Carlo simulation techniques to price lookback, Asian and barrier exotic options. Theories of variance reduction were validated except in cases where we used control variates in combination with the other variance reduction techniques in which case we observed increased variance. Again, the main aim of this half thesis was to produce a C++ program which would produce stable pricings of exotic options.
- Full Text:
- Date Issued: 2007
The coping orientation and resources of teachers educating learners with intellectual disabilities
- Authors: Jacobs, Tracey Senora
- Date: 2006
- Subjects: Special education teachers -- Job stress -- South Africa , Adjustment (Psychology) -- South Africa -- Testing , Teachers of children with mental disabilities -- Psychological testing -- South Africa , Coping Responses Inventory -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9938 , http://hdl.handle.net/10948/460 , Special education teachers -- Job stress -- South Africa , Adjustment (Psychology) -- South Africa -- Testing , Teachers of children with mental disabilities -- Psychological testing -- South Africa , Coping Responses Inventory -- South Africa
- Description: An overview of recent literature and research indicates that stress in teaching is now a wellrecognised phenomenon. More specifically, research has found special education to be more demanding than mainstream education. However, in comparison with the literature on mainstream education, both South African and international research relating to special education do not occupy prominent status in the literature. This study thus aims to explore and describe the coping orientation and resources of teachers educating learners with intellectual disabilities. The sample consisted of 59 special education teachers (49 females and 10 males) in the Nelson Mandela Metropole who educate learners with intellectual disabilities. The special education teachers who agreed to participate in the study were requested to complete a biographical questionnaire, Antonovsky’s Orientation to Life Questionnaire (SOC-29) and Hammer and Marting’s Coping Resources Inventory (CRI). An exploratory, descriptive design was utilised in this study. The data for this study was analysed by using descriptive and correlation statistics. The Pearson Product-Moment Correlation Coefficient was utilized in order to explore and describe the relationship between the sense of coherence and the coping resources of the sample. Key findings include the following: Results from the SOC-29 revealed fairly high mean scores for the current sample. Results from the CRI indicated average mean scores on both the total coping resources scale and all five subscales. Significant positive relationships were found to exist between the SOC-29 and the CRI for the current sample. Significant positive relationships were also found between the SOC-29 score and some of the subscale scores of the CRI for the current sample. In general, the findings of the present study reveal a need for further research on special education teachers. The focus should not only be limited to the pathogenic orientation, but should include more salutogenic approaches to better assist special education teachers to more effectively cope with their challenging work environment.
- Full Text:
- Date Issued: 2006
- Authors: Jacobs, Tracey Senora
- Date: 2006
- Subjects: Special education teachers -- Job stress -- South Africa , Adjustment (Psychology) -- South Africa -- Testing , Teachers of children with mental disabilities -- Psychological testing -- South Africa , Coping Responses Inventory -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9938 , http://hdl.handle.net/10948/460 , Special education teachers -- Job stress -- South Africa , Adjustment (Psychology) -- South Africa -- Testing , Teachers of children with mental disabilities -- Psychological testing -- South Africa , Coping Responses Inventory -- South Africa
- Description: An overview of recent literature and research indicates that stress in teaching is now a wellrecognised phenomenon. More specifically, research has found special education to be more demanding than mainstream education. However, in comparison with the literature on mainstream education, both South African and international research relating to special education do not occupy prominent status in the literature. This study thus aims to explore and describe the coping orientation and resources of teachers educating learners with intellectual disabilities. The sample consisted of 59 special education teachers (49 females and 10 males) in the Nelson Mandela Metropole who educate learners with intellectual disabilities. The special education teachers who agreed to participate in the study were requested to complete a biographical questionnaire, Antonovsky’s Orientation to Life Questionnaire (SOC-29) and Hammer and Marting’s Coping Resources Inventory (CRI). An exploratory, descriptive design was utilised in this study. The data for this study was analysed by using descriptive and correlation statistics. The Pearson Product-Moment Correlation Coefficient was utilized in order to explore and describe the relationship between the sense of coherence and the coping resources of the sample. Key findings include the following: Results from the SOC-29 revealed fairly high mean scores for the current sample. Results from the CRI indicated average mean scores on both the total coping resources scale and all five subscales. Significant positive relationships were found to exist between the SOC-29 and the CRI for the current sample. Significant positive relationships were also found between the SOC-29 score and some of the subscale scores of the CRI for the current sample. In general, the findings of the present study reveal a need for further research on special education teachers. The focus should not only be limited to the pathogenic orientation, but should include more salutogenic approaches to better assist special education teachers to more effectively cope with their challenging work environment.
- Full Text:
- Date Issued: 2006
An investigation into the neuroprotective effects of dehydroepiandrosterone
- Authors: Palvie, Stefanie Michelle
- Date: 2006
- Subjects: Aging -- Physiological aspects , Nervous system -- Degeneration -- Treatment , Steroid hormones , Dehydroepiandrosterone , Dehydroepiandrosterone -- Therapeutic use , Neurosciences , Neuroanatomy , Apoptosis , Pineal gland -- Physiology , Neurotoxic agents , Free radicals (Chemistry) -- Physiological effect
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3782 , http://hdl.handle.net/10962/d1003260 , Aging -- Physiological aspects , Nervous system -- Degeneration -- Treatment , Steroid hormones , Dehydroepiandrosterone , Dehydroepiandrosterone -- Therapeutic use , Neurosciences , Neuroanatomy , Apoptosis , Pineal gland -- Physiology , Neurotoxic agents , Free radicals (Chemistry) -- Physiological effect
- Description: Dehydroepiandrosterone, a C-19 steroid, is found endogenously with the highest circulating serum levels. It is converted to important steroids such as the sex hormones oestrogen and testosterone. DHEA has come under the spotlight as a purported “fountain of youth” due to its well-characterised age-related decline. The supplementation of DHEA in both the elderly and those with a pathophysiological deficiency has been shown to be of benefit, particularly with regard to wellbeing and depression. The role of DHEA in the periphery has not been elucidated beyond its role as a precursor hormone in sex steroid biosynthesis, though it has been established as a neuroactive neurosteroid, capable of exerting neuroprotective effects in the brain. Since the importance of free radicals in aging and neurodegeneration is well established, investigations were conducted on the ability of DHEA to inhibit free radical generation or scavenge existing free radicals. DHEA was able to significantly inhibit quinolinic acid-induced lipid peroxidation, a measure of membrane damage, over a range of concentrations, although the reduction did not appear to be dose-dependent. This was observed in both in vitro and in vivo studies. Thus, the ability of a compound to reduce the degree of lipid peroxidation may indicate its value as a neuroprotectant. However, DHEA did not significantly reduce cyanide induced generation of the superoxide free radical, suggesting that DHEA is not an effective free radical scavenger of the superoxide anion and that the reduction in lipid peroxidation does not occur through a scavenging mechanism. Apoptosis is a physiological process which is necessary for development and homeostasis. However, this form of programmed cell death can be initiated through various mechanisms and too much apoptotic cell death results in deleterious effects in the body. DHEA was shown not to induce apoptosis. Even the lowest concentration of DHEA investigated in this thesis shows a remarkable decrease in the degree of apoptosis caused by intrahippocampal chemical insult by the neurotoxin quinolinic acid. Cresyl violet was used to visualise tissue for histological examination which revealed that DHEA is able to preserve the normal healthy morphology of hippocampal cells which have been exposed to quinolinic acid. Cells maintained their integrity and showed little evidence of swelling associated with necrosis. Organ culture studies were performed by assessing the impact of DHEA on several pineal metabolites. The study revealed that DHEA exerted an effect on the metabolism of indoleamines in the pineal gland. Melatonin, the chief pineal hormone, did not appear to be affected while the concentrations of N-acetylserotonin, serotonin and methoxytryptamine showed significant alterations. Thus, the neuroprotective mechanism of DHEA does not appear to be mediated by an increase in the presence of melatonin. The biological importance of metal ions in neurodegeneration is also well established and thus the potential interaction between DHEA and metal ions was considered as a mechanism of action. Spectroscopic and electrochemical analyses were performed to determine whether DHEA is able to interact with metal ions as a ligand. These reveal that DHEA does not form a strong bond with the metals investigated, namely copper (II) and iron (III), but that a weak interaction is evident. These investigations were conducted in a rodent model, which has neither large amounts of endogenous DHEA, nor the enzymatic infrastructure present in humans. Thus, the theory that DHEA exerts its effects through downstream metabolic products is unlikely. However, these investigations reveal that there is merit in the statement that DHEA itself is a neuroprotective molecule, and confirm that the further investigation of DHEA is an advisable strategy in the war against neurodegeneration and aging.
- Full Text:
- Date Issued: 2006
- Authors: Palvie, Stefanie Michelle
- Date: 2006
- Subjects: Aging -- Physiological aspects , Nervous system -- Degeneration -- Treatment , Steroid hormones , Dehydroepiandrosterone , Dehydroepiandrosterone -- Therapeutic use , Neurosciences , Neuroanatomy , Apoptosis , Pineal gland -- Physiology , Neurotoxic agents , Free radicals (Chemistry) -- Physiological effect
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3782 , http://hdl.handle.net/10962/d1003260 , Aging -- Physiological aspects , Nervous system -- Degeneration -- Treatment , Steroid hormones , Dehydroepiandrosterone , Dehydroepiandrosterone -- Therapeutic use , Neurosciences , Neuroanatomy , Apoptosis , Pineal gland -- Physiology , Neurotoxic agents , Free radicals (Chemistry) -- Physiological effect
- Description: Dehydroepiandrosterone, a C-19 steroid, is found endogenously with the highest circulating serum levels. It is converted to important steroids such as the sex hormones oestrogen and testosterone. DHEA has come under the spotlight as a purported “fountain of youth” due to its well-characterised age-related decline. The supplementation of DHEA in both the elderly and those with a pathophysiological deficiency has been shown to be of benefit, particularly with regard to wellbeing and depression. The role of DHEA in the periphery has not been elucidated beyond its role as a precursor hormone in sex steroid biosynthesis, though it has been established as a neuroactive neurosteroid, capable of exerting neuroprotective effects in the brain. Since the importance of free radicals in aging and neurodegeneration is well established, investigations were conducted on the ability of DHEA to inhibit free radical generation or scavenge existing free radicals. DHEA was able to significantly inhibit quinolinic acid-induced lipid peroxidation, a measure of membrane damage, over a range of concentrations, although the reduction did not appear to be dose-dependent. This was observed in both in vitro and in vivo studies. Thus, the ability of a compound to reduce the degree of lipid peroxidation may indicate its value as a neuroprotectant. However, DHEA did not significantly reduce cyanide induced generation of the superoxide free radical, suggesting that DHEA is not an effective free radical scavenger of the superoxide anion and that the reduction in lipid peroxidation does not occur through a scavenging mechanism. Apoptosis is a physiological process which is necessary for development and homeostasis. However, this form of programmed cell death can be initiated through various mechanisms and too much apoptotic cell death results in deleterious effects in the body. DHEA was shown not to induce apoptosis. Even the lowest concentration of DHEA investigated in this thesis shows a remarkable decrease in the degree of apoptosis caused by intrahippocampal chemical insult by the neurotoxin quinolinic acid. Cresyl violet was used to visualise tissue for histological examination which revealed that DHEA is able to preserve the normal healthy morphology of hippocampal cells which have been exposed to quinolinic acid. Cells maintained their integrity and showed little evidence of swelling associated with necrosis. Organ culture studies were performed by assessing the impact of DHEA on several pineal metabolites. The study revealed that DHEA exerted an effect on the metabolism of indoleamines in the pineal gland. Melatonin, the chief pineal hormone, did not appear to be affected while the concentrations of N-acetylserotonin, serotonin and methoxytryptamine showed significant alterations. Thus, the neuroprotective mechanism of DHEA does not appear to be mediated by an increase in the presence of melatonin. The biological importance of metal ions in neurodegeneration is also well established and thus the potential interaction between DHEA and metal ions was considered as a mechanism of action. Spectroscopic and electrochemical analyses were performed to determine whether DHEA is able to interact with metal ions as a ligand. These reveal that DHEA does not form a strong bond with the metals investigated, namely copper (II) and iron (III), but that a weak interaction is evident. These investigations were conducted in a rodent model, which has neither large amounts of endogenous DHEA, nor the enzymatic infrastructure present in humans. Thus, the theory that DHEA exerts its effects through downstream metabolic products is unlikely. However, these investigations reveal that there is merit in the statement that DHEA itself is a neuroprotective molecule, and confirm that the further investigation of DHEA is an advisable strategy in the war against neurodegeneration and aging.
- Full Text:
- Date Issued: 2006
The significance of the local trade in natural resource products for livelihoods and poverty alleviation in South Africa
- Authors: Shackleton, Sheona E
- Date: 2006
- Subjects: Poverty -- South Africa Rural poor -- South Africa Natural resources -- South Africa Selling -- Handicraft South Africa -- Commerce
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4776 , http://hdl.handle.net/10962/d1011731
- Description: What role can the commercialisation of natural resource products play in the efforts to reduce poverty and vulnerability and how can this be enhanced? With poverty alleviation at the top of the global development agenda, this is a question posed by many scholars, practitioners, donor agencies and government departments operating at the environment-development interface. However, recent commentary on this issue is mixed and ambiguous, with some observers being quite optimistic regarding the potential of these products, while others hold a counter view. This thesis explores the livelihood contributions and poverty alleviation potential of four products traded locally in the Bushbuckridge municipality, South Africa; namely traditional brooms, reed mats, woodcraft and a beer made from the fruits of Sclerocarya birrea. A common approach, employing both quantitative and qualitative methods, was used to investigate the harvesting, processing and marketing arrangements, sustainability and livelihood contributions of each product. The results illustrate that any inference regarding the potential of the trade to alleviate poverty depends on how poverty is defined and interpreted, and on whether the role of these products is assessed from a holistic livelihood perspective that includes notions of vulnerability, alternatives and choice, diversification and the needs of rural producers themselves. Overall, the products studied were key in enhancing the livelihood security of the poorest members of society, forming an important safety net and assisting in raising household incomes to levels equivalent to the wider population, but generally were unlikely, on their own, to provide a route out of poverty. However, there were notable exceptions, with marked variation evident both within and across products. Incomes often surpassed local wage rates, and a minority of producers were obtaining returns equivalent to or greater than the official minimum wage. Other benefits, such as the opportunity to work from home or to diversify the livelihood portfolio, were also crucial, with the trade representing different livelihood strategies for different households. When viewed within the context of rising unemployment and HIV/AIDS these findings assume greater significance. While the trades were complex and growth limited, livelihood benefits could be improved on a sustainable basis if the sector was given the attention and support it deserves.
- Full Text:
- Date Issued: 2006
- Authors: Shackleton, Sheona E
- Date: 2006
- Subjects: Poverty -- South Africa Rural poor -- South Africa Natural resources -- South Africa Selling -- Handicraft South Africa -- Commerce
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4776 , http://hdl.handle.net/10962/d1011731
- Description: What role can the commercialisation of natural resource products play in the efforts to reduce poverty and vulnerability and how can this be enhanced? With poverty alleviation at the top of the global development agenda, this is a question posed by many scholars, practitioners, donor agencies and government departments operating at the environment-development interface. However, recent commentary on this issue is mixed and ambiguous, with some observers being quite optimistic regarding the potential of these products, while others hold a counter view. This thesis explores the livelihood contributions and poverty alleviation potential of four products traded locally in the Bushbuckridge municipality, South Africa; namely traditional brooms, reed mats, woodcraft and a beer made from the fruits of Sclerocarya birrea. A common approach, employing both quantitative and qualitative methods, was used to investigate the harvesting, processing and marketing arrangements, sustainability and livelihood contributions of each product. The results illustrate that any inference regarding the potential of the trade to alleviate poverty depends on how poverty is defined and interpreted, and on whether the role of these products is assessed from a holistic livelihood perspective that includes notions of vulnerability, alternatives and choice, diversification and the needs of rural producers themselves. Overall, the products studied were key in enhancing the livelihood security of the poorest members of society, forming an important safety net and assisting in raising household incomes to levels equivalent to the wider population, but generally were unlikely, on their own, to provide a route out of poverty. However, there were notable exceptions, with marked variation evident both within and across products. Incomes often surpassed local wage rates, and a minority of producers were obtaining returns equivalent to or greater than the official minimum wage. Other benefits, such as the opportunity to work from home or to diversify the livelihood portfolio, were also crucial, with the trade representing different livelihood strategies for different households. When viewed within the context of rising unemployment and HIV/AIDS these findings assume greater significance. While the trades were complex and growth limited, livelihood benefits could be improved on a sustainable basis if the sector was given the attention and support it deserves.
- Full Text:
- Date Issued: 2006