Implementing the CoSaWoE models in a commercial workflow product
- Authors: Erwee, Carmen
- Date: 2005
- Subjects: Computers -- Access control , Workflow , Computer security , Data protection
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9732 , http://hdl.handle.net/10948/169 , Computers -- Access control , Workflow , Computer security , Data protection
- Description: Workflow systems have gained popularity not only as a research topic, but also as a key component of Enterprize Resource Planning packages and e- business. Comprehensive workflow products that automate intra- as well inter-organizational information flow are now available for commercial use. Standardization efforts have centered mostly around the interoperability of these systems, however a standard access control model have yet to be adopted. The research community has developed several models for access control to be included as part of workflow functionality. Commercial systems, however, are still implementing access control functionality in a proprietary manner. This dissertation investigates whether a comprehensive model for gain- ing context-sensitive access control, namely CoSAWoE, can be purposefully implemented in a commercial workflow product. Using methods such as an exploratory prototype, various aspects of the model was implemented to gain an understanding of the di±culties developers face when attempting to map the model to existing proprietary software. Oracle Workflow was chosen as an example of a commercial workflow product. An investigtion of the features of this product, together with the prototype, revealed the ability to affect access control in a similar manner to the model: by specifying access control constraints during administration and design, and then enforcing those constraints dynamically during run-time. However, only certain components within these two aspects of the model directly effected the commercial workflow product. It was argued that the first two requirements of context-sensitive access control, order of events and strict least privilege, addressed by the object design, role engineering and session control components of the model, can be simulated if such capabilities are not pertinently available as part of the product. As such, guidelines were provided for how this can be achieved in Oracle Workflow. However, most of the implementation effort focussed on the last requirement of context-sensitive access control, namely separation of duties. The CoSAWoE model proposes SoD administration steps that includes expressing various business rules through a set of conflicting entities which are maintained outside the scope of the workflow system. This component was implemented easily enough through tables which were created with a relational database. Evaluating these conflicts during run-time to control worklist generation proved more di±cult. First, a thorough understanding of the way in which workflow history is maintained was necessary. A re-usable function was developed to prune user lists according to user involvement in previous tasks in the workflow and the conflicts specified for those users and tasks. However, due to the lack of a central access control service, this re- usable function must be included in the appropriate places in the workflow process model. Furthermore, the dissertation utilized a practical example to develop a prototype. This prototype served a dual purpose: firstly, to aid the author's understanding of the features and principles involved, and secondly, to illustrate and explore the implementation of the model as described in the previous paragraphs. In conclusion the dissertation summarized the CoSAWoE model's compo- nents which were found to be product agnostic, directly or indirectly imple- mentable, or not implemented in the chosen workflow product. The lessons learnt and issues surrounding the implementation effort were also discussed before further research in terms of XML documents as data containers for the workfow process were suggested.
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- Date Issued: 2005
Introducing hippocratic log files for personal privacy control
- Authors: Rutherford, Andrew
- Date: 2005
- Subjects: Computer security , Internet -- Security measures
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9743 , http://hdl.handle.net/10948/171 , Computer security , Internet -- Security measures
- Description: The rapid growth of the Internet has served to intensify existing privacy concerns of the individual, to the point that privacy is the number one concern amongst Internet users today. Tools exist that can provide users with a choice of anonymity or pseudonymity. However, many Web transactions require the release of personally identifying information, thus rendering such tools infeasible in many instances. Since it is then a given that users are often required to release personal information, which could be recorded, it follows that they require a greater degree of control over the information they release. Hippocratic databases, designed by Agrawal, Kiernan, Srikant, and Xu (2002), aim to give users greater control over information stored in a data- base. Their design was inspired by the medical Hippocratic oath, and makes data privacy protection a fundamental responsibility of the database itself. To achieve the privacy of data, Hippocratic databases are governed by 10 key privacy principles. This dissertation argues, that asides from a few challenges, the 10 prin- ciples of Hippocratic databases can be applied to log ¯les. This argument is supported by presenting a high-level functional view of a Hippocratic log file architecture. This architecture focuses on issues that highlight the con- trol users gain over their personal information that is collected in log files. By presenting a layered view of the aforementioned architecture, it was, fur- thermore, possible to provide greater insight into the major processes that would be at work in a Hippocratic log file implementation. An exploratory prototype served to understand and demonstrate certain of the architectural components of Hippocratic log files. This dissertation, thus, makes a contribution to the ideal of providing users with greater control over their personal information, by proposing the use of Hippocratic logfiles.
- Full Text:
- Date Issued: 2005
Investigation of the effect of selected polypropylene fibres and ultra-fine aggregate on plastic shrinkage cracks on South African roads
- Authors: Kluyts, Grant
- Date: 2005
- Subjects: Concrete roads -- South Africa -- Design and construction , Fiber-reinforced concrete , Reinforced concrete -- Cracking , Concrete -- Expansion and contraction , Polypropylene fibers
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9592 , http://hdl.handle.net/10948/174 , Concrete roads -- South Africa -- Design and construction , Fiber-reinforced concrete , Reinforced concrete -- Cracking , Concrete -- Expansion and contraction , Polypropylene fibers
- Description: Plastic shrinkage cracks, although not inherently structurally debilitating, expose the reinforcement in low-volume reinforced concrete roads to deleterious substances, which may reduce its effectiveness leading ultimately to structural failure. In un-reinforced low-volume concrete road these cracks appear unsightly and cause the road user an unpleasant riding experience. Many researchers believe that plastic shrinkage crack development remains a concern to the concrete industry, occurring in particularly large–area pours such as low-volume concrete roads, and therefore requires further research to understand their formation and minimization. This study reports findings on the effectiveness of oxyfluorinated polypropylene fibres to control plastic shrinkage cracks, and the effect the addition of ultra-fine material has on the formation and/or propagation of these cracks. Findings indicate that low volume dosages (2 kg/m³), of oxyfluorinated polypropylene fibre significantly reduced the formation of plastic shrinkage cracks under test conditions. Furthermore, that the addition of ultra-fine material in excess of 63 kg/m³ increased the formation and/or development of plastic shrinkage cracks.
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- Date Issued: 2005
Material characterisation of laser formed dual phase steel components
- Authors: Els-Botes, Annelize
- Date: 2005
- Subjects: Steel -- Fatigue , Bending , Lasers , Sheet-steel -- Effect of lasers on
- Language: English
- Type: Thesis , Doctoral , DTech
- Identifier: vital:9609 , http://hdl.handle.net/10948/176 , Steel -- Fatigue , Bending , Lasers , Sheet-steel -- Effect of lasers on
- Description: The nature and scope of this thesis can be divided into four categories: • FORMING PARAMETERS • Identification of various laser forming parameters in order to produce specimens of similar dimension (radius of curvature). • TEMPERATURE AND MICROSTRUCTURE • To study the effect of maximum temperature reached during the forming operation on the microstructure of the various specimens. • FATIGUE LIFE • Compare the fatigue life of the specimens produced by various laser parameters to that of the original material, and also the fatigue life of mechanical formed specimens. • RESIDUAL STRESS PROFILE Determine if the laser forming process induces detrimental residual stress magnitudes in the specimens. The main objective of this thesis was to gain an understanding of the way in which laser forming affects the fatigue performance and residual stress magnitude / distribution of dual phase steel. Although lasers have been used successfully in various manufacturing processes (welding, cutting, marking, etc.), little information is available on the influence of laser forming on many automotive alloys such as dual phase steel. The first part of the work involved a literature review of the process and factors affecting the laser forming process. It became clear from the literature overview that laser forming of sheet material thicker than 1mm is complex in nature. The variables that can influence the process are complicated and their interaction with each other is not easily controlled. The main parameters that were thus controlled in this study are as follows: • Laser power (P) • Laser head travel speed (v) • Laser beam size (mm) The chapters that follow the literature review, deals with the laser forming process of dual phase steel and the production of fatigue specimens using various laser parameters. It was found that the following laser parameters resulted in specimens with approximately the same radius of curvature: Laser power KW Beam diameter mm Interval spacing % Overlap Scanning velocity m/min Line Energy J/m 5 20 10 50 2,5 2000 3,1 14 10,5 25 2 1550 1,5 7,5 7,5 0 1,2 1250 From the results obtained from fatigue testing specimens produced with the above settings, it is clear that the laser forming process has the potential to be employed as a production stage in the manufacture of wheel centre discs while maintaining adequate fatigue strength. Large beam diameters which cause heat penetration through the thickness of the specimen and hence microstructure breakdown should be avoided, since it was shown that these specimens exhibited impaired mechanical properties than those produced with a smaller laser beam diameter. The microstructural changes observed during the forming process needs to be considered since the mechanical properties of the material changes with a change in microstructure. A dramatic change in microstructure was observed; therefore it is of crucial importance that microstructural evaluation plays an important part in deciding optimum laser parameters for the forming process of ferrous alloys. During residual stress analysis, trends were observed between measurements taken at the same location of the samples; regardless whether measurements were taken on the laser irradiated side or the reverse side of the specimen. The only difference was the magnitude of the relieved residual stress. In most cases the obtained relieved residual stress was much smaller in magnitude than that of the original plate (in the bulk of the material). The surface indicated a slight tensile residual stress for most samples evaluated. A good correlation in distribution profile was obtained between microhardness and relieved residual stress distribution at the ‘middle of sample’ location. This indicates that an increase in hardness indicates an increase in residual stress magnitude for the laser formed specimens. In conclusion, this research has proved that it is possible to deform metal plate of a 3,5mm thickness with a CO2 laser system. The research also established the effect of process parameters on the final product’s shape/bend angle and characterised the effect of the laser forming process on the material’s mechanical properties and structural integrity.
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- Date Issued: 2005
Metalorganic vapour phase epitaxial growth and characterisation of Sb-based semiconductors
- Authors: Vankova, Viera
- Date: 2005
- Subjects: Compound semiconductors , Epitaxy , Organometallic compounds , Metal organic chemical vapor deposition
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10548 , http://hdl.handle.net/10948/d1019678
- Description: This study focuses on the growth and characterization of epitaxial InAs and InAs1-xSbx. Layers are grown on InAs, GaAs and GaSb substrates by metalorganic vapour phase epitaxy, using trimethylindium, trimethylantimony and arsine as precursors. The growth parameters (V/III ratio, Sb vapour phase compositions) are varied in the temperature range from 500 ºC to 700 ºC, in order to study the influence of these parameters on the structural, optical and electrical properties of the materials. The layers were assessed by X-ray diffraction, electron and optical microscopy, photoluminescence and Hall measurements. Furthermore, the influence of hydrogenation and annealing on the electrical and optical properties of GaSb was investigated. It is shown that the growth temperature and the V/III ratio play a vital role in the resulting surface morphology of homoepitaxial and heteroepitaxial InAs layers. Growth at low temperatures is found to promote three-dimensional growth in both cases, with improvements in the surface morphologies observed for higher growth temperatures. All the investigated epilayers are n-type. It is shown that the electrical properties of heteroepitaxial InAs epilayers are complicated by a competition between bulk conduction and conduction due to a surface accumulation and an interface layer. The low temperature photoluminescence spectra of homoepitaxial InAs are dominated by two transitions. These are identified as band-to-band/excitonic and donor-acceptor recombination. The incorporation efficiency of antimony (Sb) into InAs1-xSbx is dependent on the growth temperature and the V/III ratio. Under the growth conditions used in this study, the incorporation efficiency of Sb is controlled by the thermal stability of the two constituent binaries (i.e. InAs and InSb). Changes in the low temperature photoluminescence spectra are detected with increasing x. From temperature and laser power dependent measurements, the highest energy line is attributed to band-to-band/excitonic recombination, while the peak appearing approximately 15 meV below this line is assigned to donor-acceptor recombination. The origin of an additional “moving” peak observed for higher Sb mole fraction x is tentatively attributed to quasi-donor-acceptor-recombination, arising from increased impurity/defect concentrations and a higher compensation ratio in the material. However, the unusual behaviour of this peak may also be ascribed to the presence of some degree of ordering in InAsSb. The exposure of a semiconductor to a hydrogen plasma usually leads to the passivation of shallow and deep centres, thereby removing their electrical and optical activity. In this study, the passivation and thermal stability of the native acceptor in p-type GaSb is also investigated. It is shown that this acceptor can be passivated, where after improvements in the electrical and optical properties of GaSb are observed. Upon annealing the passivated samples above 300 °C, the acceptor is reactivated.
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- Date Issued: 2005
Military strategy and it's [i.e.] its use in competitive strategy with reference to the Nelson Mandela Metropole automotive industry
- Authors: Fouché, Craig
- Date: 2005
- Subjects: Strategic planning -- South Africa -- Nelson Mandela Metropole , Automobile industry and trade -- South Africa -- Nelson Mandela Metropole , Competition
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8542 , http://hdl.handle.net/10948/177 , Strategic planning -- South Africa -- Nelson Mandela Metropole , Automobile industry and trade -- South Africa -- Nelson Mandela Metropole , Competition
- Description: Presently in the South African automotive industry competition is becoming more fierce. It is becoming more important for companies to concentrate on thier competitive strategies to ensure that they remain competitive in this industry. Military strategy techniques have always been successful in defeating an anemy opponent. An enemy in a military sense could be considered as a competitor in a business sense. There is currently a potential for an improvement of the competitive strategies that South African organisations, in particular the South African automotive industry uses to remain competitive. Military strategists such as Sun Tzu and Carl von Clausewitz have provided valuable strategy theories and philosophies to many military institutions. Military strategies such as Attrition and Maneuver have long been used by these institutions in battle to defeat the enemy. Military strategies could provide the edge that companies ranging from manufacturers, suppliers of components and dealerships need, to remain competitive in the automotive industry.
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- Date Issued: 2005
On the growth and characterisation of AIGaN alloys for optoelectronic applications
- Authors: James, Grant Robert
- Date: 2005
- Subjects: Gallium nitride -- Electric properties , Photoluminescence
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/8824 , vital:26433
- Description: In this study the growth and characterisation of undoped and Si-doped AlxGa1-xN has been performed. The layers were grown using low-pressure metalorganic vapour phase deposition (MOCVD) on sapphire substrates. The optical and electrical properties of the AlxGa1-xN layers were studied using variable temperature Hall effect and photoluminescence measurements. AlxGa1-xN layers were grown over the entire composition range. Room temperature ultraviolet (UV) transmission measurements showed that the material quality was very good for layers with an Al content, x, of 0 _ x _ 0.5. However, the quality of layers of higher composition was seen to rapidly decrease with increasing x. The electrical and optical properties of AlxGa1-xN with x < 0.5 were also good, comparable to those reported on in literature. The study of the Si-doping of AlxGa1-xN was performed in two parts; firstly a series of Al0.23Ga0.77N samples was grown in which the doping level was increased from zero to n _ 3 × 1018 cm-3. A similar, albeit a less rigorous, study was performed for Al0.41Ga0.59N and Al0.5Ga0.5N. A second series of samples was then grown in which the doping level was kept constant, while the Al content was incrementally increased. Room temperature Hall effect measurements performed on Si-doped Al0.23Ga0.77N showed that the electron concentration did not scale linearly with the silane flow, as was the case in GaN. It was also seen that the electron mobility of the layers increased with slight Si-doping, possibly due to an improvement in the crystalline quality and/or a change in the conduction mechanism. It was also found that at higher compositions (x = 0.41 and 0.50) an increase in the doping level resulted in an increase in the mobility. Variable temperature Hall effect and photoluminescence measurements, performed on the Al0.23Ga0.77N samples, revealed a good correlation between the first PL activation energy E1 and the donor activation energy ED, prompting the conclusion that the first PL recombination channel in AlxGa1-xN is due to the delocalisation of excitons bound at neutral Si donors. Furthermore, E1 and ED were seen to decrease with n1/3, as is the case for GaN and other semiconductor materials. It was also observed that strong exciton localisation occurs in slightly Si-doped material, with the amount of localization becoming less at higher doping levels. Possible mechanisms responsible for the second PL recombination channel of activation energy E2 were also proposed. The electrical and optical properties of the second set of AlxGa1-xN samples was then studied. The PL properties of undoped AlxGa1-xN were typical of a homogeneous alloy system, with the increase in the PL FWHM and exciton localisation energies with x following the trend predicted by alloy disorder theory. The variation of the band gap energy with the Al content could not, however, be fitted over the entire composition range using a single bowing parameter. It was proposed that this was due either to an effect of the 9 7 valence band crossover, or due to exciton localisation at alloy disorder and/or impurities. As was the case for GaN and Al0.23Ga0.77N, all undoped material was highly resistive. As was mentioned earlier, the exciton localisation energies increased according to alloy disorder theory in undoped AlxGa1-xN. In the doped samples, however, a large increase in the donor localisation energy was measured for x > 0.3. The possibility that Si could become a DX-centre in AlxGa1-xN was then investigated. However, Hall effect measurements showed that the Si activation energy increased in good agreement with the model of a shallow effective mass state donor, with no sudden increase in ED being observed up to x = 0.4. It was then suggested that the increase in the E1 and E2 activation energies, as well as the exciton localisation energies, could be due to the 9 7 valence band crossover, which occurs at roughly the same composition. However, due to the scarcity of reports on the valence band structure in AlxGa1-xN no conclusions could be made at this stage as to the effect of the 9 7 valence band crossover on the PL properties of AlxGa1-xN.
- Full Text:
- Date Issued: 2005
Optimising the material distribution process for the southern region of Telkom SA
- Authors: Naicker, Kosalin Ganasen
- Date: 2005
- Subjects: Business logistics -- South Africa , Telecommunication -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8547 , http://hdl.handle.net/10948/407 , Business logistics -- South Africa , Telecommunication -- South Africa
- Description: Most government owned telecommunication operators across the world have to deal with a number of regulatory, technology and service challenges, as the industry is liberalised in co-ordinance with worldwide trends. Telkom SA will be facing a number of strategic challenges that will test its ability to survive as a telecommunications company over the next number of years. To remain competitive, Telkom must develop strategies to assure survival in a competitive environment. To assure the long-term survival of Telkom SA when moving into a competitive environment, the organisation must build a sustainable competitive advantage. In the face of increasingly fierce competition, the adoption of collaborative alliances between firms is becoming more and more common and the adoption of a world-class supply chain will be an ideal scenario for Telkom SA. A worldclass supply chain goes beyond the scope of the internal operations of an organisation, therefore the material distribution process was chosen for this study, which involved the internal operations in the organisation. The study included the availability of material up to the transportation of the material to the staging areas. The aim of this research was to identify the inefficiencies of the material distribution process of the Southern Region of Telkom SA to become worldclass. A quantitative technique was used to identify the inefficiencies. It was found that the availability and transportation of material were the inefficient categories, preventing the customer to receive the product or service on time. Communication, inaccurate forecasting and inefficient transportation of material were some of the reasons for not delivering material on time. Some of the recommendations included developing a model that could overcome the current inefficiencies in transportation, improving the communication channels, training and the development of employees at all levels.
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- Date Issued: 2005
Perceptions relating to students performance in small business management at further education and training colleges
- Authors: Kiewiets, Winifred Margaret
- Date: 2005
- Subjects: Small business -- Management -- Study and teaching -- South Africa , College teachers -- South Africa -- Attitudes , College students -- Rating of -- South Africa , College students -- South Africa -- Attitudes
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:9558 , http://hdl.handle.net/10948/463 , http://hdl.handle.net/10948/d1011916 , Small business -- Management -- Study and teaching -- South Africa , College teachers -- South Africa -- Attitudes , College students -- Rating of -- South Africa , College students -- South Africa -- Attitudes
- Description: The perceptions of both students and teachers are vital to improve performance and to ensure a positive teaching and learning climate at a college. This study examines the perceptions of staff at three recently merged campuses and students regarding student performance. The research focuses specifically on the performance of students registered for the Small Business Management N3 and NSC (National Senior Certificate) curriculum. A combination of quantitative and qualitative research methods was employed to investigate the desired result. Staff teaching the subject (Small Business Management) were given semi-structured interviews, while students who are currently studying the subject were given questionnaires to complete. Data was collected and analysed. This study reveals amongst other findings that management in FET institutions needs to take cognisance of the perceptions of staff and students regarding the improvement of student performance. Opinions, attitudes, insights and recommendations expressed concerning student performance can help institutions improve their culture of teaching and learning.
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- Date Issued: 2005
Primary school children's experiences in their loss of a parent
- Authors: Hildebrand, Paula
- Date: 2005
- Subjects: Children and death -- South Africa , Parents -- South Africa -- Death -- Psychological aspects , Grief in children
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9984 , http://hdl.handle.net/10948/446 , Children and death -- South Africa , Parents -- South Africa -- Death -- Psychological aspects , Grief in children
- Description: This study aims to discover the meaning that primary school children place on the loss of a parent and the impact it has on the children’s lives. As it is an emotive topic, and because of the difficulties of interviewing children, qualitative techniques of research data collection are considered the most appropriate. The study will explore, discover and describe children’s personal experiences of loss in a phenomenological and contextual manner. The sample in the study will be selected according to non-probability and purposive sampling techniques. Because children are being interviewed, the researcher will ethically approach gatekeepers for permission, and gain their informed consent. Data will be collected using semi-structured interviews, in which the researcher will interact with the interviewees in a natural setting. Data analysis will be done according to Tesch’s eight steps for analysing qualitative research data (Creswell, 1994:155). Once this process has been completed, the data will be verified against the four criteria that Guba (in Krefting, 1991:214-222) developed for testing the trustworthiness of qualitative research findings. The results of the study, as well as conclusions and recommendations drawn from the data, will be disseminated by means of a written report.
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- Date Issued: 2005
Rehabilitation and (dis-)empowerment a discourse analysis of interviews with subjects variously positioned within the South African Correctional Services system
- Authors: Storm, Lize-Mariè
- Date: 2005
- Subjects: Criminals -- South Africa Interviews , Prison wardens -- South Africa Interviews , Criminals -- South Africa -- Rehabilitation , Discourse analysis
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8379 , http://hdl.handle.net/10948/374 , Criminals -- South Africa Interviews , Prison wardens -- South Africa Interviews , Criminals -- South Africa -- Rehabilitation , Discourse analysis
- Description: The present treatise is an attempt to come to terms with the, by all accounts, dismal conditions that exist in present-day South African prisons by addressing these conditions as they are reflected in two interviews with individuals intimately acquainted with them, as well as by pertinent media-reports. The study is predicated on the belief that the most suitable methodological approach to a situation characterized by extreme conflicts and tensions in terms of power relations, is provided by (mainly Foucaultian) discourse-theory and the discourse-analysis that it makes possible. Consequently, after an introduction in which the present study is justified, followed by a theoretical section outlining the terrain of discourse theory and discourse-analysis, two chapters are devoted to specific discourse-analyses of interviews with an awaiting-trial prisoner in a South African prison and a warden employed at the same institution, with a view to uncovering the power-relations at stake here. While acknowledging that the implications of the insights thus afforded are not, strictly speaking, generalizable in a positivist manner, and that the power-relations brought to light by means of these discourse-analyses are highly specific, it is argued that various other studies pertaining to the South African prison system indicate that these powerrelations – more specifically the disempowerment of prisoners by the functioning of violently hierarchical discursive practices in South African prisons - are not restricted to the prison in question. In fact, given the SA Correctional Services’ stated policy of rehabilitation, it is striking that there is scant evidence of any such rehabilitation in the prisons concerned – at least in the sense of prisoners attaining a level of moral responsibility that would enable them to live as accountable citizens in a democratic society. In conclusion it is argued that the present state of affairs, far from being conducive to the stated goal of rehabilitation, actually undermines its realization, and that the social and economic inequalities in South Africa, exacerbated by the union between ‘democracy’ and global capitalism, are perpetuated and reinforced by the existing discursive practices in South African prisons.
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- Date Issued: 2005
Socio-economic, cultural and policy issues impacting on community forestry development : a case study of Hlabisa district in Kwazulu-Natal
- Authors: Masuku, Sipho Sikhumbuzo
- Date: 2005
- Subjects: Forests and forestry -- South Africa -- KwaZulu-Natal , Forests and forestry -- Economic aspects -- South Africa -- KwaZulu-Natal , Forests and forestry -- Social aspect -- South Africa -- KwaZulu-Natal , Forests and forestry -- Cultural aspect -- South Africa -- KwaZulu-Natal
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10743 , http://hdl.handle.net/10948/818 , Forests and forestry -- South Africa -- KwaZulu-Natal , Forests and forestry -- Economic aspects -- South Africa -- KwaZulu-Natal , Forests and forestry -- Social aspect -- South Africa -- KwaZulu-Natal , Forests and forestry -- Cultural aspect -- South Africa -- KwaZulu-Natal
- Description: South Africa is not well-endowed with indigenous forests and those that remain are known to be degraded and declining at an alarming rate. This constitutes a direct threat to the quality of life of the resource-poor rural households which are directly dependent on the resources indigenous forests offer, as well as to ecological integrity. It is also recognised that the declining tree resources, particularly the indigenous tree species of high value, are increasingly threatened by a number of growing subsistence demands. This emphasises the need to establish, cultivate and conserve high-value tree species. Community forestry is recognised as a viable option for optimising land productivity; reducing pressure on indigenous forests and woodlands; ensuring a sustainable supply of desired tree products and services; and improving the quality of life of the resource-poor rural households. The primary purpose of Community Forestry Development (CFD) in the Hlabisa District is the provision of an information service and of technical support to enhance the livelihoods of rural communities by means of tree-related resources. Community forestry mainly focuses on tree resources that form an integral part of or contribute to rural people’s livelihoods. This includes small-scale growers (woodlots), woodlands and indigenous forests. Community forestry can be defined as tree growing and managed by the people for the people. Community forestry encompasses a wide range of activities which include farm forestry, agroforestry, village planting, woodlots, woodland management and indigenous-forest management by rural people, as well as tree planting in urban and peri-urban areas. Natural forests in South Africa account for less than 1 percent of the total land area. It has been suggested that these natural forests will no longer be able to meet the demand for forest products by 2020. The KwaZulu Department of Agriculture and Forestry embarked on community forestry in 1976 (but only on an ad hoc basis) as a possible solution to this dilemma. Later, the two South African pulp and paper giants, SAPPI and Mondi, started the Project Grow and Khulanathi Schemes respectively. One of the objectives of out-grower schemes was to encourage rural communities to plant trees on their own lands for the economic, social and environmental benefits trees offer. For example, timber could be sold to forestry companies. Financial assistance was offered to these communities to encourage implementation of such schemes. This exercise was aimed at bringing economic activity, capacity- building and community empowerment to the rural areas. The growers would benefit from the financial assistance and the readily available market provided by the company, while the company would be able to satisfy its demand for timber.
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- Date Issued: 2005
Soul tattoos : an exploration of the therapeutic self - the indelible and the disposable
- Authors: Naidoo, Leanne
- Date: 2005
- Subjects: Tattooing -- Therapeutic use
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9842 , http://hdl.handle.net/10948/373 , Tattooing -- Therapeutic use
- Description: From a social constructionist perspective, the self of the therapist is the only tool that she takes into therapy with her. The study of the therapeutic self therefore becomes important as this impacts on the quality of therapy received by the client. This treatise explores the development of the researcher’s therapeutic self through the storying of significant learning experiences in the course of her training in counselling psychology. An analysis of the narrative reveals the substance of some of the soul tattoos that make up her therapeutic self. The study was undertaken from an action research approach, thus emphasising the investigation of the therapeutic self in the field and feeding this information back into the practice of counselling psychology in the course of the research project. The themes extracted in the analysis reveal the process of action learning and what constituted significant learning experiences for the researcher. The researcher found that certain conditions were required for the formation of soul tattoos and that merely obtaining a masters degree in counselling psychology was not sufficient preparation for the practice of counselling psychology.
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- Date Issued: 2005
Strategies engaged by a South African beverage organisation entering African markets
- Authors: Brink, Andries Petrus
- Date: 2005
- Subjects: International business enterprises , Coca-cola Sabco (Firm) , Soft drink industry -- South Africa , International trade
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8544 , http://hdl.handle.net/10948/410 , International business enterprises , Coca-cola Sabco (Firm) , Soft drink industry -- South Africa , International trade
- Description: Africa is acknowledged as a vast, untapped market for consumer goods as trade barriers are coming down and economies are starting to develop. The need for consumer goods arises with economic activity. This poses the following question, which will be addressed by this research: How can potential African consumer markets be successfully unlocked by a South African beverage organisation, thereby reducing risk of failure and eliminating the cost of a hit-and-miss approach? The secondary study focused on evaluating the aspects involved with risks and the modes of entry into foreign markets. The macro-environmental factors affecting the expansion into foreign markets were investigated to determine what influence they had on the entry mode chosen for a specific country targeted for expansion. Finally the marketing factors influencing the entry mode were analysed. The significance of trade blocs together with the advantages thereof was included in the study. The primary study was based on the theory and principles of existing literature. The Coca-Cola Sabco organisation was taken as a case study. Four countries, namely Kenya, Uganda, Mozambique and Namibia, were investigated. Questionnaires containing a set of questions to satisfy the sub-problems were sent to the various country managers and their first layers of management. Likewise, interviews were conducted with Coca-Cola Sabco head office strategic management. The empirical results obtained, indicated a strong concurrence, with the theory of entry modes and the influences of macro-environmental factors. In certain aspects, however, some contradictions with the theory pertaining to the Coca-Cola Sabco organisation, were observed. The findings concurred with the theory in that risk were minimised by the acquisition of a going concern that already possessed the infrastructure and logistics such as raw material procurement, manufacturing staff skills, distribution networks and political contacts. The empirical results contradict theory with respect to location economies and scale economies, as the Coca-Cola Company’s franchise agreement excludes the exporting of beverage products. Furthermore, Coca-Cola Sabco becomes involved in expansion initiatives only in reaction to an invitation from the Coca-Cola Company and not of its own desire. Therefore, market surveys are conducted subsequent to an invitation from the Coca-Cola Company. South African organisations planning expansion initiatives into emerging African markets need to take the specific macro- environmental factors of the country in question into consideration in order to minimise risk. A franchise agreement restricting exporting as in the case of Coco-Cola Company or any other restrictive agreement, might cause a deviation from contemporary theory, for example, where markets will be assessed for purposes of location and scale economies. Deviations from contemporary theory could also occur where a franchise opportunity is offered in a specific country that may not be the preferred market choice, due to its lack of growth potential.
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- Date Issued: 2005
Strategies for sustaining family business through succession planning and family creed
- Authors: Gwiliza, Nwabisa
- Date: 2005
- Subjects: Family-owned business enterprises -- South Africa -- Succession , Family corporations -- South Africa -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8537 , http://hdl.handle.net/10948/193 , Family-owned business enterprises -- South Africa -- Succession , Family corporations -- South Africa -- Management
- Description: Family business literature reveals that the majority of family businesses do not make it to the second generation, and quite a few are fortunate to be passed onto the third generation. Succession planning is the critical issue that enhances continuity of the family business. Relational influences indicate that the balancing of family systems and business systems is more likely to encourage high quality succession. The development of effective practical governance systems can help the family business achieve its strategy. External influences indicate that owner role adjustment, defined as the predecessor’s “letting go” in the firm, as well as the development and mentoring of the successor, shape the effectiveness of succession in the family business.
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- Date Issued: 2005
Stress, coping resources and adjustment of married mothers in the teaching profession
- Authors: Nell, Reinette Deidre
- Date: 2005
- Subjects: Women teachers -- Life skills assessment -- South Africa , Work and family -- South Africa -- Psychological aspects , Life skills , Stress (Psychology)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9851 , http://hdl.handle.net/10948/387 , Women teachers -- Life skills assessment -- South Africa , Work and family -- South Africa -- Psychological aspects , Life skills , Stress (Psychology)
- Description: The changes that have taken place in the South African educational system over the past few years have placed teachers under increasing stress. While abundant overseas literature is available regarding teacher stress, limited studies have focused specifically on South African samples. Female teachers, and working mothers, often experience additional stressors to men. Studies on women’s health have received little attention in comparison with the magnitude of research conducted on men’s health. The aim of the current study was to explore and describe the stress, coping resources and adjustment of married mothers in the teaching profession, and to explore and describe the patterns of stress and coping resources of these women. A non-experimental, exploratory descriptive study was employed. A biographical questionnaire and three paper-and-pencil measures, namely the Experience of Work and Life Questionnaire, the Coping Resources Inventory and the Personal, Home, Social and Formal Relations Questionnaire, were administered to 31 full-time primary school teachers who are married mothers of dependent children under the age of 14 years. A non-probability convenience sampling technique was employed. Descriptive statistics and cluster analysis were used in the data analysis. The results of the WLQ for this sample indicated that the mean score for the total level of stress fell within the high range, but with regards to the mode, the majority of the participants had average scores. The results of the CRI indicated an average level of coping resources for the present sample. The sample scored slightly above average on seven of the eleven components of the adjustment areas of the PHSF and slightly below average on the other four components. The participants in cluster one had average levels of stress and an average level of coping resources. The participants in cluster two scored very high levels of stress and average levels of coping resources. The participants in cluster three had very high levels of stress and low levels of coping resources. Suggestions were made for future research involving the stress, coping resources and adjustment of married mothers in the teaching profession. Finally, the limitations as well as the value of the research were outlined.
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- Date Issued: 2005
Study of the skincalm filling process at Aspen Pharmacare applying some six sigma principles
- Authors: Marx, Johannes
- Date: 2005
- Subjects: Ointments -- Packaging , Six sigma (Quality control standard)
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10369 , http://hdl.handle.net/10948/184 , Ointments -- Packaging , Six sigma (Quality control standard)
- Description: Aspen Pharmacare is listed on the Johannesburg Securities Exchange South Africa (JSE) and is Africa’s largest pharmaceutical manufacturer. The company is a major supplier of branded pharmaceutical and healthcare products to the local and selected international markets. For decades, Aspen has manufactured a basket of affordable, quality, and effective products for the ethical, generic over-the-counter (OTC) and personal care markets. Aspen is also the leading supplier of generic medicines to the public sector, providing comprehensive coverage of the products on the Essential Drug List. Aspen continues to deliver on its commitment toward playing a role in social responsibility diseases such as HIV/AIDS, tuberculosis and malaria. In August 2003 Aspen developed Africa’s first generic anti-retroviral drug, namely Aspen-Stavudine. Aspen’s manufacturing facilities are based in Port Elizabeth (PE) and East London. Aspen has recently completed an Oral Solid Dosage (OSD) manufacturing facility worth approximately R150 million in PE. The Group manufactures approximately 20 tons of product daily and in excess of 400 tons of solid dosage pharmaceuticals, which equates to more than 2 billion tablets. In addition, more than 3 million litres of liquid pharmaceuticals and over 200 tons of pharmaceutical creams and ointments are produced per year [1]. Aspen excels at delivering quality products and services, exceeding customer expectations, complying with international standards in an environment that cultivates technical expertise and innovation. Following this philosophy through to the shop floor areas mean that there are always initiatives in continuous production improvement. One of these improvement projects introduced is called Six Sigma. 8 Ten members of the staff, selected from different expertise fields in the company were trained in Six Sigma. Knowledge gained from the two week training course were applied to different areas in the factory using Six Sigma principles. This dissertation focuses on the study undertaken in one of production areas, namely the filling process of the ointments and creams at the Aspen Port Elizabeth facility.
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- Date Issued: 2005
Teacher adaptation of a curriculum during implementation
- Authors: Childs, Margaret Mary
- Date: 2005
- Subjects: Curriculum change -- South Africa , Educational change -- South Africa
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: vital:9486 , http://hdl.handle.net/10948/377 , Curriculum change -- South Africa , Educational change -- South Africa
- Description: The purpose of this study is to investigate to what extent foundation phase teachers adapt Curriculum 2005. The study was guided by two research questions: (1) What are the critical components of Curriculum 2005 (foundation phase)? (2) What are the adaptations that teachers have made in teaching this curriculum? The specific focus of this study is foundation phase teachers’ initial implementation of the revised version of Curriculum 2005, the Revised National Curriculum Statement (RNCS). An Innovation Configuration Checklist was developed identifying the critical components of the RNCS and the variations of each. Using the checklist, foundation phase teachers were surveyed to establish the adaptations being made during implementation. The findings of this study indicate that there is less active learning and more teacher directed activity than is required by the RNCS. Assessment appears to be a problem area. Most teachers understand what is expected of them in terms of assessment and attempt to put it into practice. Assessment has however, proved to be burdensome and time consuming. Teachers’ planning demonstrates a sound understanding of the procedures to be followed. Teachers do however, need support in terms of deeper pedagogical content knowledge. Although teachers comply with the technical aspects of curriculum development they neglect the emancipatory aspects of the RNCS. The situation in foundation phase classrooms might be described as one where much change is taking place, but little transformation is happening at present. Teachers are nevertheless, reflecting on how to improve their teaching and continue to explore ways to adapt and improve the RNCS.
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- Date Issued: 2005
The application of constraint management to a simulated manufacturing environment
- Authors: Van der Merwe, Karl Robert
- Date: 2005
- Subjects: Theory of constraints (Management) , Production management , Manufacturing processes -- Computer simulation , Production engineering -- Computer simulation
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9606 , http://hdl.handle.net/10948/409 , Theory of constraints (Management) , Production management , Manufacturing processes -- Computer simulation , Production engineering -- Computer simulation
- Description: South Africa endorsed a world trade accord ratified in Geneva on December 13, 1993. To promote world economic growth, the General Agreement on Tariffs and Trade (GATT) aimed to slash duties on 8000 categories of manufactured goods. Tariff barriers have declined significantly and are now approaching trivial levels (Hill, 1999, p163). Unfortunately, South Africa is ranked near the bottom of the World Competitiveness Report (Cheales, 1995, p8). Increased foreign competition has caused many South African companies to search for techniques that will improve their overall performance. Unless these techniques can be identified and implemented timeously, some companies may fail to remain competitive. This research addresses the lack of awareness in the Eastern Cape (SA) and utilisation of two techniques used successfully in the USA (and elsewhere in developed countries) namely, Constraint Management and simulation. The overall objective was to develop a method of convincing industry management of the benefits of the two techniques. The approach adopted was to use simulation to prove Constraint Management. To achieve this objective a comprehensive literature survey was performed to determine the logic of each technique and the associated benefits. The next step was to determine the levels of awareness among industry practitioners and managers. Managers, engineers and academics were requested to complete questionnaires in order to determine awareness and utilisation of each technique as well as factors that prevented the application of both. The simulation modeling process was examined in order to verify the logic of simulation and a model of a manufacturing system was developed. Constraint Management principles were then applied to the model in a series of experiments. This process was then developed into a manual that could be used to address the lack of awareness and utilisation of both Constraint Management and simulation. The manual was tested on a group of BTech students and industry practitioners in order to establish whether its use would be effective in raising awareness, understanding and utilisation. The outcome was positive and it was established that this technique was effective.
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- Date Issued: 2005
The contribution of the Labour Court to the development of strike law
- Authors: Nengovhela, Livhuwani Adolphus
- Date: 2005
- Subjects: Strikes and lockouts -- Law and legislation -- South Africa , Labor laws and legislation -- South Africa , Labor courts -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10191 , http://hdl.handle.net/10948/430 , Strikes and lockouts -- Law and legislation -- South Africa , Labor laws and legislation -- South Africa , Labor courts -- South Africa
- Description: The Labour Relations Act 66 of 1995 brought a number of changes in the labour relations environment from its inception on 11 November 1996. The Act codified Industrial Court decisions that were already established under the strike-law jurisprudence from the Labour Relations Act 28 of 1956. These general changes to the law also impact on the strike-law regime. The purpose of this paper is to give an overview of the contributions made by the Labour Courts1 in developing strike law from the inception of the Act. The Labour Courts have made a number of decisions that have helped in clarifying the provisions of the Act. One should hasten to say that this has never been a smooth process by the courts. It will further be shown in this paper that some of the court decisions were not well accepted in the light of other considerations, such as the Constitution and the previous Industrial Court decisions. On some occasions the Constitutional Court had to intervene in order to clarify the intention of the legislature. For the purpose of effectively dealing with this topic, I shall briefly give the historical context of strike law in the form of common-law position, and the strike-law position before the Bill of Rights and the Constitution. I shall then endeavour to identify the legislative provision of the Act when it comes to strike-law provisions, at the same time identifying the important court decisions that were made.
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- Date Issued: 2005