The construction of news texts on 'peace' an analysis of Sunday Times' coverage of the Peace Summits in the Democratic Republic of Congo (August 1998 - January 2001)
- Authors: Moiloa, Makhotso Mamasole Ruth
- Date: 2003
- Subjects: Sunday Times (Johannesburg, South Africa) , Congo (Democratic Republic) -- In mass media , Journalism -- Objectivity -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3467 , http://hdl.handle.net/10962/d1002922 , Sunday Times (Johannesburg, South Africa) , Congo (Democratic Republic) -- In mass media , Journalism -- Objectivity -- South Africa
- Description: This study examines the construction of news texts on peace and the peace process in the Democratic Republic of the Congo (DRC) in Sunday Times articles dating from August 1998 to January 2001. Peace is an ideological frame that is applied to a complex process that Muller (2000) argues involves and employs a variety of dynamics: diplomacy, economics, force/military intervention and propaganda. As a consequence, different interest groups and nations define peace in different ways. But whatever the definition, the common objective is to restore normalcy via a ceasefire. Peace as a phenomenon has been heightened and sustained by repetitive media attention, thus effectively separating it from international politics (i.e. colonialism of the mind, economy and land), and firmly locating it as a matter of not just public concern, but of international public concern. Using the cultural studies approach to a study of media texts provides a rich foundation for this study. Textual analysis of the articles explores themes and participation and places emphasis on the display of patterns of belief and value that are encoded in the language. What results is a sustained examination of media texts within their socio-cultural and historical context. This study s findings challenge the claim that the media report peace objectively and on its own terms. In particular, the study denies that the Sunday Times objectively, fairly and truthfully reported the experience and process in the DRC between August 1998 and January 2001. Instead it finds that the newspaper constructed a particular understanding of peace, peace talks and the peace process, characterised by repetition, ritualisation and personalisation. Furthermore, this study proposes - and echoes the call for - an alternative news reporting model that will enhance audiences understandings of conflict and its resolution, thereby enhancing the quality of their life.
- Full Text:
- Date Issued: 2003
The decline of agriculture in rural Transkei: ʺthe case of Mission Location in Butterworthʺ
- Authors: Ngcaba, Siyanda Vincent
- Date: 2003
- Subjects: Agriculture -- South Africa -- Transkei , Land use -- South Africa -- Transkei , Land tenure -- South Africa -- Transkei
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3296 , http://hdl.handle.net/10962/d1003084 , Agriculture -- South Africa -- Transkei , Land use -- South Africa -- Transkei , Land tenure -- South Africa -- Transkei
- Description: The following dissertation sets out to investigate the decline of agriculture in Mission location at Butterworth, Transkei, using the Rehabilitation Scheme as a benchmark. The scheme was introduced in 1945 to combat soil erosion and improve agriculture in the African reserve areas, as the South African government claimed. The dissertation argues that this claim by the government served to mask the real intentions behind the scheme namely, to regiment the migrant labour system by depriving as many Africans as possible of productive land so that they were unable to fully subsist by means of agriculture. This is further shown by analysing the impact of the Rehabilitation scheme in Mission location in which a substantial number of people lost arable land as a result of the implementation of the scheme in 1945. These people were consequently denied the wherewithal to subsist by agriculture. Moreover, the efforts of the government resulted to a modernisation of agriculture by making it more cash-based- for example through the introduction of fencing, the need for tractors as a result of a decline in stock numbers (in part as a result of stock culling). Most people could hardly afford this type of agriculture and were consequently forced off the land. The dissertation concludes that indeed the decline of agriculture in Mission location can be linked to the changing agricultural and land-holding practices brought about by the government- especially the introduction of the Rehabilitation scheme.
- Full Text:
- Date Issued: 2003
The development and evaluation of Cryptophlebia Leucotreta granulovirus (CrleGV) as a biological control agent for the management of false codling moth, Cryptophlebia Leucotreta, on citrus
- Authors: Moore, Sean Douglas
- Date: 2003
- Subjects: Cryptophlebia leucotreta Cryptophlebia leucotreta -- Control Pests -- Biological control Citrus -- Diseases and pests
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3942 , http://hdl.handle.net/10962/d1004001
- Description: A granulovirus isolated from Cryptophlebia leucotreta larvae was shown through restriction endonuclease analysis to be a novel strain (CrleGV-SA). No more than one isolate could be identified from a laboratory culture of C. leucotreta. However, a preliminary examination of restricted DNA profiles of isolates from different geographical regions indicated some minor differences. In surface dose bioassays on artificial diet, LC50 and LC90 values with neonate larvae were estimated to be 4.095 x 103 OBs/ml and 1.185 x 105 OBs/ml respectively. LT50 and LT90 values with neonate larvae were estimated to be 4 days 22 h and 7 days 8 h, respectively. Detached fruit (navel orange) bioassays with neonate larvae indicated that virus concentrations that are likely to be effective in the field range from 1.08 x 107 to 3.819 x 1010 OBs/ml. In surface dose bioassays with fifth instar larvae LC50 and LC90 values were estimated to be 2.678 x 107 OBs/ml and 9.118 x 109 OBs/ml respectively. LT50 and LT90 values were estimated to be 7 days 17 h and 9 days 8 h, respectively. A new artificial diet for mass rearing the host was developed. Microbial contamination of diet was significantly reduced by adding nipagin and sorbic acid to the diet and by surface sterilising C. leucotreta eggs with Sporekill. Almost 20 % more eggs were produced from moths reared on the new diet compared to moths reared on the old diet. A further 9 % improvement in egg production and a reduction in the labour required to produce eggs, was made with the development of a new oviposition cage attached to the moth eclosion box. Virus was mass produced in fifth instar C. leucotreta larvae by surface inoculating diet with the LC90. When 300 individuals were placed onto inoculated diet, 56 % of them were recovered six to 11 days later as infected larvae. Mean larval equivalents was 1.158 x 1011 OBs/larva. When larvae and diet were harvested together, highest yields of virus were achieved at eight days after inoculation. Microbial contamination in semi-purified preparations of CrleGV ranged from 176211 to 433594 (OB:CFU ratio). Half-life of CrleGV in the field was estimated to be less than 1 day on the northern aspect of trees and between 3 - 6 days on the southern aspect. Original activity remaining (OAR) of the virus dropped below 50 % after 5 days on the northern aspect of trees and was still at 69 % on the southern aspect of trees after 3 weeks. In field trials, CrleGV reduced C. leucotreta infestation of navel oranges by up to 60 % for a period of 39 days. CrleGV in combination with augmentation of the C. leucotreta egg parasitoid, Trichogrammatoidea cryptophlebiae, reduced infestation by 70 %. The integration of CrleGV into an integrated pest management (IPM) system for the management of C. leucotreta on citrus is proposed.
- Full Text:
- Date Issued: 2003
The development of a baculovirus expression system for the production of Helicoverpa armigera stunt virus capsids for use in the encapsidation of foreign molecules
- Authors: Mosisili, Kekeletso Mpho Thakane
- Date: 2003
- Subjects: Helicoverpa armigera , Fall armyworm , Baculoviruses , Insects -- Viruses , RNA -- Analysis
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4088 , http://hdl.handle.net/10962/d1007700 , Helicoverpa armigera , Fall armyworm , Baculoviruses , Insects -- Viruses , RNA -- Analysis
- Description: The capsid protein of Helicoverpa armigera stunt virus (HaSV) a T=4 insect virus was expressed in Spodoptera frugiperda 9 cells using a baculovirus vector. When the insect cells were infected at a high MOl the expressed coat protein assembled into virus-like particles (VLPs) that spontaneously underwent maturation and were morphologically indistinguishable from wild-type HaSV. The VLPs were electron dense when viewed under EM and encapsidated their coat protein mRNA. When Sf9 cells were infected at a low multiplicity of infection (MOl) the expressed capsid protein assembled into procapsids that did not spontaneously undergo maturation. These procapsids underwent autoproteolytic maturation cleavage when they were treated with an acidic buffer. The procapsids were used in the encapsidation of a FITC labelled peptide. The peptide encapsidating VLPs showed an increase in their buoyant density that was not collaborated by an increase in the concentration of the FITC labelled peptide detected when these samples were compared to control samples with similar buoyant densities.
- Full Text:
- Date Issued: 2003
The development of a financial performance measurement framework for South African education institutions
- Authors: Leo, Terrance
- Date: 2003
- Subjects: Universities and colleges -- South Africa -- Finance , Universities and colleges -- South Africa -- Evaluation , Performance -- Measurement
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10903 , http://hdl.handle.net/10948/217 , Universities and colleges -- South Africa -- Finance , Universities and colleges -- South Africa -- Evaluation , Performance -- Measurement
- Description: Limited research has been conducted on financial performance indicators in South Africa. In European countries, Australia and the United States of America, literature has shown that there has been extensive research and implementation of performance indicators, to measure the achievements of objectives. A literature study was conducted for this research on the usage of PI’s, with a view to pinpointing the financial indicators. The literature study was used to develop a questionnaire. The questionnaire was distributed to universities and Technikons in South Africa, to obtain a measure of relevance and agreement on the performance indicators. The findings of the questionnaire culminated in a model that only consists of those indicators with a high level of concurrence among respondents. Performance indicators can serve as a management tool to measure performance and as a means to enhance transparency and accountability.
- Full Text:
- Date Issued: 2003
The development of a generic integrated model of promotional management for purposes of optimising organisational turnover growth and increased profits from sales promotional activities
- Authors: Marques, Kenneth
- Date: 2003
- Subjects: Sales promotion , Profit
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10913 , http://hdl.handle.net/10948/119 , Sales promotion , Profit
- Description: This paper concerns itself with the devising of a model which organisations can consult when considering hosting any sales promotional activities. The success regarding profits derived from these sales promotions activities vary. These anomalies prompted a further investigation into the need for a single promotional model which could be utilized in varied business environments to optimize profits derived from sales promotions. The uniqueness of the South African environment was also taken into account when considering the various criteria in the development of the model. Sensitivity with regards to the types of barriers peculiar to South Africa is vital. The following excerpt from East Cape Weekend (An Eastern Cape newspaper) reinforces the belief that there are factors to which global environments are not exposed, and thus, the model should and will be designed to cater for these South African peculiarities by virtue of the fact that it will be based on the critical success factors of successful South African retail organisations. Resistance to technological progress due to the threat of possible job redundancy is one of the South African peculiarities that is referred to in the East Cape Weekend 09/06/2001 Michelle Pugh-Parry, “Controversial telephone technology will make paying bills safer”. Besides safety and convenience, the system can alleviate the R600m PE municipal areas debt, yet the union has outwardly rejected the plan and stormed the municipal buildings, protesting that it may cause job loss. It is precisely this type of peculiar barrier to progress that the author intends to accommodate for in the devising of his model. South African organizations will be considered when performing the empirical and primary studies in order to formulate a model that has been adapted to and caters for local needs due to its fundamental aspects being based on the South African circumstance. The information in this study contains the analysis of promotions in a broad context in terms of the following six facets of retail management, namely, operations, human resources, marketing, organizational behaviour, economics and strategies. The results of an analysis of promotional activities used by organizations in the Port Elizabeth municipal area was gained via the application of a questionnaire. An empirical study was performed and provided information that could be used in the development of a promotional model. The application of the model, benefits to whom and importance of the model was debated in the summary, conclusions and recommendations. The table of contents follows.
- Full Text:
- Date Issued: 2003
The development of a model for organising educational resources on an Intranet
- Authors: Sing Min, Yvonne Monica
- Date: 2003
- Subjects: Intranets (Computer networks) , Education -- Computer network resources , Internet in education
- Language: English
- Type: Thesis , Masters , MTech (Information Technology)
- Identifier: vital:10799 , http://hdl.handle.net/10948/221 , Intranets (Computer networks) , Education -- Computer network resources , Internet in education
- Description: The twenty-first century has found education at the crossroads of change. There are burgeoning challenges facing the modern educator. To rise to the importuning, educators find themselves turning to Information Technology for the answers. The technologies utilised in attempts to overcome the challenges often include the Internet and electronic educational resources. Although the Internet is not unduly called the Information Highway, it is also fraught with misleading and incorrect information. Educators’ arduous searches result in few good and useable resources. Thus, to store, organise and efficiently retrieve the discovered resources is a matter of time-saving. The aim of the study was to develop a method to organise and retrieve educational resources in an efficient and personalised manner. In order to do this, an exploration into pedagogy and educational paradigms was undertaken. The current educational paradigm, constructivism, proposes that each learner is an individual with unique learning and personal needs. To develop a new model, the current models need to be understood. The current solutions for the organising of educational resources are realised as several software packages, also called e-learning packages. A list of criteria that describes the essential requirements for organising educational resources was established. These criteria were based upon the pedagogical principles prescribed by educators and the practical technological frameworks necessary to fulfil the needs of the teaching/learning situation. These criteria were utilised to critique and explore the available solutions. It was found that although the available e-learning packages fulfil a need within their genre, it does not meet with the core requirements of constructivism. The resource base model seeks to address these needs by focussing on the educational aspects of resource delivery over an Intranet. For the purposes of storing, organising and delivering the resources, a database had to be established. This database had to have numerous qualities, including the ability to search and retrieve resources with great efficiency. Retrieving data in an efficient manner is the forte of the star schema, while the storing and organising of data is the strength of a normalised schema. It is not standard practice to utilise both types of schemas within the same database. A star schema is usually reserved for data warehouses because of its data retrieval abilities. It is customary to utilise a normalised schema for operational databases. The resource base model, however, needs both the storage facilities of an operational database and the efficient query facilities of a data warehouse. The resource base model, therefore, melds both schemas into one database with interlinking tables. This database forms the foundation (or the back-end) of the resource base. The resource base model utilises web browsers as its user interface (or front-end). The results of the study on the pedagogy, the current e-learning solutions and the resource base were written up within this dissertation. The contribution that this dissertation makes is the development of a technique to efficiently store, organise and retrieve educational resources in such a manner that both the requirements of constructivism and outcomes-based education are fulfilled. To this end, a list of technological and pedagogical criteria on which to critique a resource delivery technique has been developed. This dissertation also elaborates on the schema designs chosen for the resource base, namely the normalised schema and the star schema. From this schema, a prototype has been developed. The prototype’s function was two-fold. The first function is to determine the feasibility of the technique. Secondly, to determine the success of the technique in fulfilling the needs expressed in the list of criteria
- Full Text:
- Date Issued: 2003
The development of a model of competencies for small, medium and microsized enterprises (SMME'S) to achieve competitive advantage in the East Cape Motor Industry Cluster
- Authors: De Beer, Lloyd
- Date: 2003
- Subjects: Business enterprises -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10854 , http://hdl.handle.net/10948/121 , Business enterprises -- South Africa -- Eastern Cape
- Description: The research problem addressed in this study was to identify the generic strategies that small, medium and micro enterprises (SMME’s) are required to implement in order to achieve competitive advantage in the highly competitive global automotive market. Markets have merged into one huge global marketplace, increasing the competitive forces on all the participants in the automotive markets. Strategies to achieve competitive advantage has changed from the traditional domestic strategies to that of strategies required for global competitive advantage. This has created challenges for SMME’s to attain competitive advantage essential in the fast-changing global markets. The East Cape Motor Industry Cluster (ECMIC) is the heart of the SA automotive industry with three of the major automobile manufacturers having their assembly plants located in the Buffalo and Nelson Mandela Metropoles. A significant number of component manufacturers and their suppliers serve these manufacturers, as well as the other automobile manufacturers located elsewhere in South Africa. Many of these component manufacturers and suppliers are SMME’s. The need to become globally competitive is thus critical for SMME’s in the region. This study investigates the generic strategies that SMME organisations are required to implement in order to achieve competitive advantage in the ECMIC, and based on this and the empirical study that seeks opinion from management of SMME firms in the ECMIC, a model of generic strategies to create competitive advantage is developed.
- Full Text:
- Date Issued: 2003
The development of a model to estimate the cost for the provision of free basic water before the implementation of a water project
- Authors: Gillmer, Ir Ronald
- Date: 2003
- Subjects: Water-supply, rural -- South Africa -- Costs , Water-supply, rural -- South Africa -- Government policy
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10874 , http://hdl.handle.net/10948/222 , Water-supply, rural -- South Africa -- Costs , Water-supply, rural -- South Africa -- Government policy
- Description: This research study addresses the problem of whether local government can afford free basic water in rural areas. To achieve this objective a comprehensive literature study was performed, which included: · Lessons in water sector approaches from international experience and how these experiences compare with the South African situation. 1.The current basic water supply legislation in South Africa and how this legislation affects the subsidy arrangements and the financing of free basic water. 2.The operation and maintenance cost and the benefits of effective operation and maintenance of water supply schemes. A model was developed that could estimate the cost of rural water supply per household per month from the operation and maintenance data that was collected over a period of twenty-two months from a water supply scheme. As part of the provision of free basic water, a nine-step flow chart was developed to determine rural water operation and maintenance subsidy and a free basic water policy to help local government make informed decisions. The model was tested on different water supply schemes to verify the accuracy of the models estimation of the cost of rural water supply per household per month. The information obtained from the literature and from the test of the model resulted in various recommendations and conclusions.
- Full Text:
- Date Issued: 2003
The development of a science competency test for technikon students
- Authors: Davids, Samiega
- Date: 2003
- Subjects: Science -- Study and teaching (Higher) -- South Africa , Universities and colleges -- South Africa -- Entrance requirements , Port Elizabeth Technikon Entrance requirements
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10782 , http://hdl.handle.net/10948/87 , Science -- Study and teaching (Higher) -- South Africa , Universities and colleges -- South Africa -- Entrance requirements , Port Elizabeth Technikon Entrance requirements
- Description: In the mid-1980’s institutions of higher learning were coerced by the South African government to admit students from all races. As a result, these institutions were confronted with the need to identify preparedness for higher learning, especially amongst the ex-Department of Education and Training (DET) learners. Grade 12 results were not a sufficient predictor for ex-DET learners, and a review of current admission criteria became a necessity. This study aims to develop a suitable science entry-level test to be used as a component of an existing test battery. The test battery is used as an admission tool by the Port Elizabeth Technikon to further assess first year applicants who do not meet the normal entrance requirements for a science course. The only requirement for further assessment being Grade 12 physical science. The science entry-level test consists of a list of validated science skills and knowledge to be used to assess the skills and knowledge mastered at the time of test taking. On the basis of test scores, an assessment is made regarding the applicant’s preparedness for higher learning. This study holds the view that preparedness in students for higher learning in science can be measured by means of valid science competencies. In addition, knowledge of the level of preparedness of the applicant enables further educational support and guidance to be provided where necessary. Research which measures manifest academic ability rather than potential to learn is favoured since it is believed that the former generates psychometric evidence of that which was already mastered academically whilst the latter determines whether the student will be able to achieve under ideal conditions. The content covered by the proposed Science Competency Test was sanctioned by technikon lecturers of first year physics and chemistry courses. The content was taken from the examinable section of the Grade 11 and 12 physical science syllabi. This content is the most acceptable and fair knowledge-base a prospective science student can be expected to have mastered at school. The content was limited to those skills and knowledge believed by the lecturers to contribute to academic success in the first year. Items that tested this content were compiled and pilot tests were administered to Grade 12 physical science learners at various disadvantaged schools. The Science Competency Test was compiled from the pool of trial items after the performance of the items was statistically determined. This final Science Competency Test was completed by a sample of 179 first-time first year science students. The findings of the study were inconclusive as the Science Competency Test showed a moderate predictive ability for only one section of the sample. It further showed that the weighted matric score, WMS was not a significant predictor of future academic performance of the sample either. A discrepancy in performance amongst learners of different home languages and educational backgrounds was also noted.
- Full Text:
- Date Issued: 2003
The development of a strategic management model for industrial development zones to attract Greenfield Foreign Direct Investments
- Authors: Rich, Guy Martin
- Date: 2003
- Subjects: Investments, foreign -- South Africa , Industrialization -- South Africa , Economic development -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10937 , http://hdl.handle.net/10948/220 , Investments, foreign -- South Africa , Industrialization -- South Africa , Economic development -- South Africa
- Description: In order to become globally competitive, South Africa has embarked on an industrial development zone (IDZ) programme to boost investment, increase the socio-economic climate, attract world-class manufacturers and generate local and foreign direct investment (FDI) while creating employment, encouraging skills and technology transfer, and increasing foreign exchange earnings. Twelve strategic areas within South Africa have been identified and are in the process of, or have been, declared IDZs. East London and Coega are the first two IDZs to come online in South Africa and have generated much publicity in the past number of years. One of the aims of the IDZs, as world-class production areas, is to generate FDI. Drivers of international FDI include globalisation, political, economic and legal environments and competitive advantage. According to the United Nations Conference on Trade and Development (2002: 25), FDI accounts for 16 percent of worldwide gross fixed capital formation – and a growing proportion of this is going to developing nations. According to the World Economic Processing Zones Association (WEPZA), IDZs have been the star performer in attracting investment and technology to developing countries during the past 50 years (2002: www.wepza.org). If the Eastern Cape IDZ programme is to be a success, the development corporations that have been established as the management arms of the IDZs will need to facilitate strategic economic advantage, look towards strategic investments that are sustainable, take advantage of and grow existing industrial capacity and create economic and social benefits for the region. There are a number of dynamics and reasons behind global FDI decisions. In order to be successful at attracting FDI the development corporations need to understand these dynamics and reasons in order to achieve a strategic fit between potential investor and the IDZ. This can be done by adopting a strategic management model for greenfield FDI from international investors.
- Full Text:
- Date Issued: 2003
The development of an instrument to measure intrapreneurship: entrepreneurship within the corporate setting
- Authors: Hill, Marguerite Elizabeth
- Date: 2003
- Subjects: Entrepreneurship , Psychology, Industrial , Organizational change
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2991 , http://hdl.handle.net/10962/d1002500 , Entrepreneurship , Psychology, Industrial , Organizational change
- Description: “Intrapreneurship is not a choice, it is the only survival attitude” (Pinchot, 2000, p.75). In 1985 Pinchot coined the term ‘intrapreneurship’, short for intra-corporate entrepreneurship, which describes the practice of entrepreneurship within organisations. Intrapreneurship is increasingly becoming a term used in the business world to describe organisations that are willing to pursue opportunities, initiate actions, and emphasise new, innovative products or services. Due to the dynamic nature of modern organisations, it is imperative that organisations and their managers remain receptive to new ideas, approaches and attitudes. It is therefore the belief that rapid and cost-effective innovation is the primary source of lasting competitive advantage in the twenty-first century, leaving organisations no alternative but to become intrapreneurial or cease to exist. This thesis focuses on this need and examines ways in which intrapreneurship can be measured in organisations in order to provide a benchmark for further organisational development. A questionnaire (known as the Intrapreneurial Intensity Index) was designed and distributed to a sample of 500 employees working in large South African organisations, which classified themselves as ‘forward-thinking’ and aimed for an intrapreneurial ‘type of thinking’. The results obtained from these questionnaires underwent item analysis, after which the questionnaire was redesigned in an electronic format. A pilot case study was then conducted in order to test the reliability of the instrument. Finally the questionnaire was redistributed to a sample of six organisations that are viewed as being ‘intrapreneurial’ and two that are regarded as being ‘non-intrapreneurial’. The data from this sample was used to test the validity of the Intrapreneurial Intensity Index and to demonstrate its application. This study resulted in an instrument that can be used to ascertain the intensity of intrapreneurship present in a large organisation. Specifically, this instrument can provide an overall view of the organisation’s intrapreneurial ability, as well as identify the specific areas in the organisation that require change or modification in order to become more intrapreneurial. This instrument provides a valuable means of identifying areas in need of organisational change, by determining an organisation’s intrapreneurial properties in the organisation’s core areas.
- Full Text:
- Date Issued: 2003
The development of an integrated model for the implementation of a product data management system at Delta Motor Corporation
- Authors: Stroud, Trevor
- Date: 2003
- Subjects: Computer integrated manufacturing systems , Automobile industry and trade -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:10873 , http://hdl.handle.net/10948/224 , Computer integrated manufacturing systems , Automobile industry and trade -- South Africa -- Port Elizabeth
- Description: Information technology in mature organisations is viewed as an enabler of teams working together in the product development process. Technology is no longer pursued as an end in itself, but for its contribution to cost control, product quality, and most importantly, time to profit. The focus of this research is the analysis of methodologies used to implement the Teamcenter Engineering Product Data Management (PDM) system at Delta Motor Corporation, which manages all of Delta’s CAD data. The main problem of this research is as follows: How can Delta Motor Corporation successfully implement the “Teamcentre Engineering” Product Data Management System? The main problem will be broken down into three distinct parts, namely the developing of a best practice process, analysing Delta’s implementation and making recommendations for improvement. The literature survey provides the basis for developing a best-practice process, which serves as a benchmark against which to evaluate the methodology used by Delta. Interviews were conducted with selected personnel who were involved in the implementation, and Tesch’s model for content analysis used to analyse the responses. The implementation process of Teamcenter Engineering at Delta was conducted in three phases and only the first was completed at the time of writing this research paper. For this reason, analysis revolves around the first phase of implementation, which was limited to the drawing office, while recommendations are made for the implementation of phase two and three, which roll-out this system to the rest of Delta and it’s supplier base.
- Full Text:
- Date Issued: 2003
The diamondback moth, Plutella xylostella (L.), (Lepidoptera: Plutellidae) and its biological control in the Eastern Cape Province, South Africa
- Authors: Smith, Tamara Jane
- Date: 2003
- Subjects: Plutellidae Plutellidae -- South Africa -- Eastern Cape Insect pests -- Biological control -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5626 , http://hdl.handle.net/10962/d1004742
- Description: The diamondback moth, Plutella xylostella (L.), is a pest on crucifer crops worldwide, damaging the leaves, florets and seed pods of many crucifers including cabbage, cauliflower, broccoli and canola. It has been controlled using broad-spectrum insecticides, but this has led to a rapid build-up of insecticide resistance. In the Grahamstown area of the Eastern Cape Province, South Africa, diamondback moth showed resistance to cypermethrin (a pyrethroid) on commercially grown cabbages. Therefore it is imperative that other methods of control be adopted, including both cultural control and biological control using parasitoids, and that these are incorporated into an Integrated Pest Management (IPM) programme. The diamondback moth and its parasitoids were monitored weekly from April 1997 to November 1999 at three sites near Grahamstown. One site was a commercial farm with an active insecticide spraying program; the others were unsprayed. Infestation levels were highest during spring (September to November) and autumn (March to May). Nine species of parasitoids were associated with the diamondback moth, with abundances being highest over spring and early summer (September to December). Cotesia plutellae (Kurdjumov) dominated the sprayed site, while the unsprayed sites yielded a complex of parasitoids, including C. plutellae, Diadegma mollipla (Holmgren), Diadromus collaris Gravenhorst and Oomyzus sokolowsldi (Kurdjumov). Parasitism levels ranged between 10 and 90%. There was a large amount of site-to-site and year-to-year variation. Parasitoids were an effective mortality factor against the diamondback moth. The effects of temperature on development and mortality, and of field size and non-crop plants on the distribution of diamondback moth and its parasitoids, were investigated. The results show that high temperatures can depress pest populations, and that the size and surroundings of fields can be manipulated to improve cultural control of the diamondback moth. Suggestions for effective rPM in the Eastern Cape Province include a reduction in insecticide applications, the use of bioinsecticides, for example Bacillus thuringiensis Berliner (Bt) and the encouragement of indigenous parasitoids by planting suitable nectar sources. Cultural control methods are also important and involve removal of cabbage refuse after harvest, management of wild crucifers around cabbage fields, scouting and monitoring the moth population and determining the optimal field size to assist with control by parasitoids.
- Full Text:
- Date Issued: 2003
The diet of a small group of extralimital giraffe
- Authors: Parker, Daniel M , Bernard, Ric T F , Colvin, S A
- Date: 2003
- Language: English
- Type: Article
- Identifier: vital:6950 , http://hdl.handle.net/10962/d1011980
- Description: Giraffe are extralimital in the Eastern Cape Province, South Africa where recent local introductions have persisted despite limited research into their impact on the indigenous flora. The diet of 15 giraffe at the Shamwari Game Reserve was recorded by direct observation during summer (March/April) and winter (July/August) 2001, quantifying diet by frequency of occurrence (individual records scored and expressed as a percentage of the total). Preference indices were also calculated. Habitat use was measured by the number of hours giraffe fed in different habitats. The diet comprised of 14 plant species, the most important species being Rhus longispina (47.9%), Acacia karroo (25.7%) and Euclea undulata (17.6%). Importance of R. longispina, A. karroo and Tarchonanthus camphoratus fluctuated seasonally. Rhus longispina was more important in winter with a corresponding decrease in feeding on A. karroo. Tarchonanthus camphoratus was only consumed during summer. Acacia karroo thickets (previously disturbed areas) were utilized most (summer 12 h; winter 9 h), with alternative habitats utilized more often in winter than in summer. We suggest that the seasonal fluctuation in the importance of R. longispina & A. karroo reflects the deciduous nature of A. karroo.
- Full Text:
- Date Issued: 2003
The effect of human soluble FceRII on the RPMI 8866 B-Lymphoblastoid and the U937 Monocyte cell lines
- Authors: Daniels, Brodie Belinda
- Date: 2003
- Subjects: Developmental inmmunology , Cellular control mechanisms
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:11084 , http://hdl.handle.net/10948/322 , Developmental inmmunology , Cellular control mechanisms
- Description: Due to the diverse functions of Fc eRII, such as its roles in cellular adhesion, growth and differentiation of B and T lymphocytes, rescue of B cells from apoptosis and release of cytotoxic mediators, it is clear why it is believed to be a central molecule in allergic response. Because of its important role in the regulation of IgE production, FceRII may be the primary cause of certain allergic conditions. This study attempted to express and purify a recombinant human soluble FceRII to test its effect on a B-lymphoblastoid (RPMI 8866) and a monocytic (U937) cell line. The protein was expressed in Escherichia coli inclusion bodies, before being refolded and purified in a single gel chromatography step. This pure protein was then tested for biological activity by testing its IgE binding func tion. Once proven functional, it was used to test its effect on the cell lines at three concentrations for its apoptotic rescue properties and its cytokine effects. The recombinant protein did not seem to have any significant effect on the apoptotic rescue of either cell line. While the recombinant sFceRII appeared to have a slight effect on the stimulation of IL-1ß and TNFa in the RPMI 8866 cells, there was no apparent effect on the production of NF?B. In U937 cells, the protein did not seem to have any effect on the stimulation of IL-1ß, TNFa or NF?B. However, the cytokine effects of the recombinant protein were tested on isolated PBMCs from a healthy individual and a hyper-IgE syndrome patient. The recombinant protein was able to stimulate the production of cytokines in both individuals’ PBMCs, proving that it has the same effect as the natural protein. The upregulation of these cytokines indicates that the recombinant protein is able to stimulate the immune system. Therefore, this recombinant soluble FceRII protein could possibly be used for immune therapy.
- Full Text:
- Date Issued: 2003
The effects of age and education on selected cognitive tests: the trail making test, the digit symbol sub-test, and the finger tapping test
- Authors: Stewart, Maureen
- Date: 2003
- Subjects: Aging -- Psychological testing , Brain -- Aging , Neuropsychology , Neuropsychological tests
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3114 , http://hdl.handle.net/10962/d1004601 , Aging -- Psychological testing , Brain -- Aging , Neuropsychology , Neuropsychological tests
- Description: Numerous studies have suggested that neuropsychological test performance is affected by demographic variables such as age and education. This study examined the effects of age and education on the Trail Making Test, the Digit Symbol Sub-Test, and the Finger Tapping Test in a non-clinical sample of community dwellers with a relatively low level of education (8 to 12 years) in South Africa. The sample consisted of 161 participants across six age groups: 20-39, 40-59, 69-69, 70-79, 80-89 and 90-95 years. Results were examined for mean age effects and variability trends. Highly significant age effects were present across the age groups for all tests, however, there was no uniform pattern of variability across the tests. The Digit Symbol Substitution Test and the Finger Tapping Tests showed a pattern of increasing variability with increasing age, followed by a decrease in very old age while no trend was evident for the Digit Symbol extensions (the Immediate and Delayed Recall tests). The Trail Making Test, Parts A and B, showed a consistent trend of increasing variability across the age groups. Data from the present study was compared with existing data from two relatively high education samples, with equivalent age groupings, to examine education effects. Results showed an education effect for all tests with the high education groups outperforming the low education groups. Although the effects of education became less potent with advancing age, the mean performance of the oldest (80-89 years) high education age group was superior to that of the equivalent low education age group. Comparison of variability trends across both samples showed that the highest variability (the shuttle bulge) was present at the same point along the age axis, or at a later point, for the low education group, as that for the high education group. This finding is inconsistent with Jordan's (1997) 'shuttle model of variability' which predicts an earlier occurrence of the shuttle bulge (left shuttle shift effect) for a low education sample. This study demonstrated that performance on neuropsychological tests is influenced by age and education and highlighted the dangers inherent in unquestionably applying norms, which have not been corrected for age and education, when assessing the older adult.
- Full Text:
- Date Issued: 2003
The effects of criminalising publication offences on the freedom of the press in Uganda, 1986-2000
- Authors: Mbaine, Emmanuel Adolf
- Date: 2003
- Subjects: Freedom of the press -- Uganda , Press and politics -- Uganda , Mass media -- Political aspects -- Uganda , Political participation -- Uganda , Democracy -- Uganda
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3462 , http://hdl.handle.net/10962/d1002917 , Freedom of the press -- Uganda , Press and politics -- Uganda , Mass media -- Political aspects -- Uganda , Political participation -- Uganda , Democracy -- Uganda
- Description: The press in Uganda has come a long way right from the colonial days when newspapers sprang up, mainly from missionary activity, through the eras of Obote 1 (1962 – 1971), Idi Amin (1971 – 1979), Obote 11 (1980 – 1985), Tito Okello (1985 – 1986) and the Museveni administration (1986 – to date). For most of this time, the press in Uganda enjoyed very little or no freedom to do its work. The year 1986 saw the ascendancy to power of the Yoweri Museveni as president after a five-year bush war with promised to restore peace, democracy, the rule of law, economic prosperity and civic rights and freedoms. Several achievements in these areas have been registered since 1986. Newspapers have sprouted and the broadcast industry liberalised to allow private ownership that has seen the proliferation of FM stations. However, the relations between the government and the press remain strained with journalists arrested and/or prosecuted mainly for offences relating to sedition, publication of false news and criminal libel. This study was intended to examine why journalists in Uganda continue to suffer arrests and incarceration when the country has been reported to be moving towards democratisation. The study was also aimed at assessing the impact of arresting journalists and arraigning them before the courts of law in the period under study and what this portends for freedom of the press and democratisation. It is recommended, among others, that journalists in Uganda need more unity of purpose to pursue meaningful media law reform that will de-criminalise publication wrongs. The civil remedies available to people who feel offended by the press are sufficient, if not excessive. The efforts already undertaken by the Eastern Africa Media Institute (EAMI) Uganda Chapter in this direction should be pursued to a logical conclusion.
- Full Text:
- Date Issued: 2003
The effects of goat browsing on ecosystem patterns and processes in succulent thicket, South Africa
- Authors: Lechmere-Oertel, Richard Geoffrey
- Date: 2003
- Subjects: Succulent plants -- South Africa -- Eastern Cape , Landscape ecology -- South Africa -- Eastern Cape , Goats -- Feeding and feeds
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:11074 , http://hdl.handle.net/10948/309 , Succulent plants -- South Africa -- Eastern Cape , Landscape ecology -- South Africa -- Eastern Cape , Goats -- Feeding and feeds
- Description: Transformation in the arid succulent thicket of the Eastern Cape of South Africa in response to unsustainable livestock production has been widespread, with less than 10 percent remaining intact. Transformation in succulent thicket has resulted in large areas of dense thicket (comprising a two-phase mosaic of perennial-vegetated patches separated by animal paths and bare patches) being replaced with a ‘pseudo-savanna’ of remnant canopy trees with a structurally simple field layer of ephemeral and short- lived perennial grasses and forbs. There is an extensive literature describing the transformation of succulent thicket, with many speculative statements about the underlying mechanisms of transformation. The central focus of this study was to improve our mechanistic understanding of transformation in succulent thicket using field experiments. Hopefully these results will set another foundation upon which future management of succulent thicket can be improved and large-scale restoration initiated. This study comprises four themes that are linked to the concept of landscape function. The central premise of landscape function is that functional landscapes have mechanisms that capture and retain scarce resources. Conversely, as landscapes become increasingly dysfunctional, so these mechanisms become disrupted. In succulent thicket, dysfunctio n appears to be linked to the reduced ability to harvest water, cycle carbon and a loss of organic carbon. In this thesis I examined some of the key processes that influence water and organic carbon fluxes: perennial vegetation cover, soil fertility, litter fall and decomposition, and runoff and soil erosion. The experimental design that was used for all this work was a factorial ANOVA based on replicated fenceline contrasts that reflect differences in long-term management history. The main objectives of this thesis were to: quantify the patterns of transformation in an arid form of succulent thicket, including changes in the biomass, cover and structure of the dominant vegetation guilds; test the stability of the transformed succulent thicket ecosystem to show whether it is a new stable state or an intermediate stage in a trajectory towards a highly desertified state where only the ephemeral grasses and forbs persist; describe and compare soil fertility across transformation contrasts, concentrating on changes in the spatial patterns of soil resources and the ability of the soil to harvest precipitation; to compare litter fall and decomposition of leaf material from the dominant plants in intact and transformed succulent thicket; to quantify and compare run-off and erosion from run-off plots in intact and transformed succulent thicket. Transformation and stability I quantified the changes in plant diversity, physiognomy and biomass that occur across transformation contrasts. Thicket transformation results in a significant loss of plant diversity and functional types. There is also a significant reduction in the biomass (c. 80 t.ha-1) and structural complexity of the vegetation, both vertically and horizontally. These results were interpreted in terms of their implications for ecosystem functioning and stability. To test the stability of the transformed succulent thicket I used aerial photographs and ground-truthing to track the survivorship of canopy trees over 60 years in pseudo-savanna landscapes. I also measured seedling establishment in different habitats. I show that the pseudo-savanna is not a stable state owing to ongoing adult mortality and no recruitment of canopy trees. Soil fertility and water status I hypothesised that the above-ground changes in ve getation would be accompanied by similar trends in the pattern and levels of soil nutrient resources and the ability of the landscape to harvest precipitation. I compared soil fertility (organic carbon, available nitrogen and phosphorus), texture, matric potential, and surface micro-topography in the two main micro- habitats on either side of the replicated fenceline contrasts. The results show that intact spekboom thicket has a distinct spatial pattern of soil fertility where nutrients and organic carbon are concentrated under the patches of perennial shrubs, compared to under canopy trees and open spaces. Transformation results in a significant homogenisation out of this pattern and an overall reduction in the fertility of the landscape. The proportion of the landscape surface that would promote infiltration of water decreases from 60 – 0.6 percent. Soil moisture retention (matric potential) also decreases with transformation. I interpreted these patterns in terms of the ability of the landscape to harvest and release water after rainfall events. Litter fall and decomposition Surface litter and soil organic matter are critical components to wooded ecosystems; contributing to several ecosystem functions. The rates of litter fall and decomposition are ratelimiting steps in nutrient cycling and incorporation of organic matter into the soil. The ecological mechanisms behind the collapse of succulent thicket in the face of domestic herbivory are not fully understood, but are believed to include the breakdown of several ecosystem processes, including litter fall and decomposition. I quantified the changes in litter fall and litter decomposition of four of the dominant perennial woody plants (Euclea undulata, Pappea capensis, Portulacaria afra and Rhus longispina) across the replicated fenceline. Litter fall was measured over 14 months using mesh traps. Decomposition was measured over 15 months using a combination of litterbags and unprotected leaf packs. I also quantified soil microclimate during the experimental period; hypothesising that transformation would lead to soil conditions less amenable for biotic activity. Litter fall in succulent thicket was very high for a semi-arid system, comparing more to temperate forests. The leaf-succulent P. afra contributed the largest single component of the total litter production at a landscape scale. The effect of transformation on litter fall was species specific. Deep-rooted or drought-adapted species showed no change in litter yield with transformation; shallow-rooted species showed a significant decrease. There were few significant differences in decomposition rates across the transformation gradient and between litter types. Portulacaria afra litter had the steepest rate of mass loss, and was most affected by transformation. The more recalcitrant (high C:N ratio) leaves of P. capensis remained largely unaffected by transformation. These results indicate the critical role of the perennial vegetation in incorporating organic carbon into the soil. Transformation of succulent thicket leads to a disruption of the flow of carbon into the soil, reinforcing the cycle of transformation through reduced fertility. Rehabilitation of this ecosystem will require the active establishment of species, such as P. afra, that will restart the flow of carbon into the soil. Run-off & Erosion The landscape function model predicts that functional semi-arid shrublands efficiently conserve limiting resources such as water and water-bourn sediments (soil and organic matter). As these rangelands become transformed through unsustainable livestock production, so their ability to conserve resources decreases. The primary determinant of landscape function and conservation of resources appears to be the proportional cover of perennial vegetation. I hypothesised that the switch from a two-phase mosaic dominated by perennial succulent and woody shrubs to a single phase system dominated by an ephemeral field layer would be accompanied by disruption of the mechanisms that conserve resources. Specifically, I tested the hypothesis that transformation of succulent thicket increases runoff volume, sediment concentration of runoff, soil erosion and loss of organic matter at a patch scale (c. 100 m2). Runoff and water-borne sediment were measured from runoff plots established across replicated fenceline contrasts. Data were collected from eight extreme weather events over two years. There were no significant differences between runoff and erosion across the transformation contrast, as each extreme weather event was unique in terms of its runoff response. The transformed runoff plots alone also gave inconsistent results, largely due to differences in the cover of ephemeral forbs and weakly perennial grasses. Runoff and erosion were not predictable from the data across the transformation gradient due to complex interactions between the nature of the above-ground vegetation, soil micro-topography and land use history. The results highlighted the need for longer-term catchment experiments to generate a predictive understanding of the effect of transformation on runoff and erosion in succulent thicket.
- Full Text:
- Date Issued: 2003
The effects of the Labour Relations Act on small, medium and micro enterprises (SMME's) in the Nelson Mandela Metropolitan
- Authors: Matiso, Khayalethu Goodman
- Date: 2003
- Subjects: Small business -- South Africa -- Nelson Mandela Metropolitan Area , Industrial relations -- South Africa -- Port Elizabeth Metropolitan Area
- Language: English
- Type: Thesis , Masters , MTech (Business Administration)
- Identifier: vital:10912 , http://hdl.handle.net/10948/123 , Small business -- South Africa -- Nelson Mandela Metropolitan Area , Industrial relations -- South Africa -- Port Elizabeth Metropolitan Area
- Description: The society in which we live is economically based and the greater part of our activities centres in the economy. Within this context, the Department of Trade and Industry recognized that small business development was an important area for government intervention. A long process of highlighting the importance of this sector and creating the right environment in which small businesses could grow and flourish was initiated at the level of policy and legislation. In the Labour Relations field, an attempt at achieving some measure of certainty in previously disputed areas was made through the passing of the Labour Relations Act of 1995. This study aims at exploring the effects of this Act on the growth and development of the small business sector in the Nelson Mandela Metropole. In fulfilling this aim, the focus was restricted to factors such as dismissal of workers, strikes and lock-outs, freedom of association and dispute resolution. The theory pertaining to Labour Legislation and small business development was obtained by means of conducting a comprehensive literature study. The literature study included all relevant perspectives on the Labour Relations Act and Government Policy on small businesses. From the study, a questionnaire was developed to test the impact of the Act on the growth and development of the small business sector in the Nelson Mandela Metropole. The empirical results, in general, indicated non-compliance with the Labour Relations Act and negative views on the value of the Act on the growth and development of the small business sector in the Nelson Mandela Metropole. From the literature study and the findings of the research questionnaire, it became apparent that: · A comprehensive audit of the small business sector in the Nelson Mandela Metropole is needed. The aim of the audit would be to review the current operations of the small business sector in the Metropole. This outcome will indicate the extent of understanding and compliance with the various aspects of the Labour Relations Act. · The acquisition of industrial relations knowledge and skills by owners and leaders in the sector is vital for the development of the sector. The Skills Development Act provides a funding framework for skills training that is relevant to a specific industry. The small business sector could benefit significantly from the provision of this piece of legislation. · A comprehensive support programme for SMME’s is a necessary prerequisite for the growth and development of the sector. The support system could include tax incentives, flexible labour legislation and training as indicated in the above paragraph.
- Full Text:
- Date Issued: 2003