A grid based approach for the control and recall of the properties of IEEE 1394 audio devices
- Authors: Foulkes, Philip James
- Date: 2009
- Subjects: IEEE 1394 (Standard) , Computer sound processing , Digital communications , Local area networks (Computer networks) , Sound -- Recording and reproducing -- Digital techniques , Computational grids (Computer systems)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4594 , http://hdl.handle.net/10962/d1004836 , IEEE 1394 (Standard) , Computer sound processing , Digital communications , Local area networks (Computer networks) , Sound -- Recording and reproducing -- Digital techniques , Computational grids (Computer systems)
- Description: The control of modern audio studios is complex. Audio mixing desks have grown to the point where they contain thousands of parameters. The control surfaces of these devices do not reflect the routing and signal processing capabilities that the devices are capable of. Software audio mixing desk editors have been developed that allow for the remote control of these devices, but their graphical user interfaces retain the complexities of the audio mixing desk that they represent. In this thesis, we propose a grid approach to audio mixing. The developed grid audio mixing desk editor represents an audio mixing desk as a series of graphical routing matrices. These routing matrices expose the various signal processing points and signal flows that exist within an audio mixing desk. The routing matrices allow for audio signals to be routed within the device, and allow for the device’s parameters to be adjusted by selecting the appropriate signal processing points. With the use of the programming interfaces that are defined as part of the Studio Connections – Total Recall SDK, the audio mixing desk editor was integrated with compatible DAW applications to provide persistence of audio mixing desk parameter states. Many audio studios currently use digital networks to connect audio devices together. Audio and control signals are patched between devices through the use of software patchbays that run on computers. We propose a double grid-based FireWire patchbay aimed to simplify the patching of signals between audio devices on a FireWire network. The FireWire patchbay was implemented in such a way such that it can host software device editors that are Studio Connections compatible. This has allowed software device editors to be associated with the devices that are represented on the FireWire patchbay, thus allowing for studio wide control from a single application. The double grid-based patchbay was implemented such that it can be hosted by compatible DAW applications. Through this, the double grid-based patchbay application is able to provide the DAW application with the state of the parameters of the devices in a studio, as well as the connections between them. The DAW application may save this state data to its native song files. This state data may be passed back to the double grid-based patchbay when the song file is reloaded at a later stage. This state data may then be used by the patchbay to restore the parameters of the patchbay and its device editors to a previous state. This restored state may then be transferred to the hardware devices being represented by the patchbay.
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A knowledge-oriented, context-sensitive architectural framework for service deployment in marginalized rural communities
- Authors: Thinyane, Mamello P
- Date: 2009
- Subjects: Information technology Expert systems (Computer science) Software architecture User interfaces (Computer systems) Ethnoscience Social networks Rural development Technical assistance -- Developing countries Information networks -- Developing countries
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4599 , http://hdl.handle.net/10962/d1004843
- Description: The notion of a global knowledge society is somewhat of a misnomer due to the fact that large portions of the global community are not participants in this global knowledge society which is driven, shaped by and socio-technically biased towards a small fraction of the global population. Information and Communication Technology (ICT) is culture-sensitive and this is a dynamic that is largely ignored in the majority of ICT for Development (ICT4D) interventions, leading to the technological determinism flaw and ultimately a failure of the undertaken projects. The deployment of ICT solutions, in particular in the context of ICT4D, must be informed by the cultural and socio-technical profile of the deployment environments and solutions themselves must be developed with a focus towards context-sensitivity and ethnocentricity. In this thesis, we investigate the viability of a software architectural framework for the development of ICT solutions that are context-sensitive and ethnocentric1, and so aligned with the cultural and social dynamics within the environment of deployment. The conceptual framework, named PIASK, defines five tiers (presentation, interaction, access, social networking, and knowledge base) which allow for: behavioural completeness of the layer components; a modular and functionally decoupled architecture; and the flexibility to situate and contextualize the developed applications along the dimensions of the User Interface (UI), interaction modalities, usage metaphors, underlying Indigenous Knowledge (IK), and access protocols. We have developed a proof-of-concept service platform, called KnowNet, based on the PIASK architecture. KnowNet is built around the knowledge base layer, which consists of domain ontologies that encapsulate the knowledge in the platform, with an intrinsic flexibility to access secondary knowledge repositories. The domain ontologies constructed (as examples) are for the provisioning of eServices to support societal activities (e.g. commerce, health, agriculture, medicine) within a rural and marginalized area of Dwesa, in the Eastern Cape province of South Africa. The social networking layer allows for situating the platform within the local social systems. Heterogeneity of user profiles and multiplicity of end-user devices are handled through the access and the presentation components, and the service logic is implemented by the interaction components. This services platform validates the PIASK architecture for end-to-end provisioning of multi-modal, heterogeneous, ontology-based services. The development of KnowNet was informed on one hand by the latest trends within service architectures, semantic web technologies and social applications, and on the other hand by the context consideration based on the profile (IK systems dynamics, infrastructure, usability requirements) of the Dwesa community. The realization of the service platform is based on the JADE Multi-Agent System (MAS), and this shows the applicability and adequacy of MAS’s for service deployment in a rural context, at the same time providing key advantages such as platform fault-tolerance, robustness and flexibility. While the context of conceptualization of PIASK and the implementation of KnowNet is that of rurality and of ICT4D, the applicability of the architecture extends to other similarly heterogeneous and context-sensitive domains. KnowNet has been validated for functional and technical adequacy, and we have also undertaken an initial prevalidation for social context sensitivity. We observe that the five tier PIASK architecture provides an adequate framework for developing context-sensitive and ethnocentric software: by functionally separating and making explicit the social networking and access tier components, while still maintaining the traditional separation of presentation, business logic and data components.
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A needs analysis for the implementation of a complementary course in mathematics education for teachers of mathematics in Namibia: a case study
- Authors: Ilukena, Alex Mbonabi
- Date: 2009
- Subjects: Education -- Namibia -- Case studies Mathematics -- Study and teaching -- Namibia -- Case studies Mathematics teachers -- Training of -- Namibia -- Case studies Teacher educators -- Training of -- Case studies Teachers -- Training of -- Namibia -- Case studies
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1677 , http://hdl.handle.net/10962/d1003560
- Description: After the introduction of the Basic Education Teacher Diploma (BETD) in Namibia, a number of studies were conducted on how teachers, lecturers, stakeholders and the Namibian public perceived the BETD program and its implementation. However, very few studies focussed specifically on mathematics subject content knowledge and pedagogical content knowledge in the BETD. The purpose of this study was to investigate the need for a complementary course in mathematics education to address the lack of mathematical content and pedagogical knowledge in the Namibian BETD. The study involved five mathematics school teachers, two mathematics college lecturers in the Kavango educational region and a professor of mathematics education at the University of Namibia. These participants were purposefully selected because of their knowledge and experiences with various aspects of the BETD program. The motivation for conducting this study was to gain a better understanding of some of the issues that have been raised about the BETD program, particularly the perceived inadequacy of mathematical subject content and methodology since the inception of the program. The study adopts a qualitative approach in reporting participants’ reflections. The views of the focal educators and documents such as syllabi and course outlines were the main source of data. The findings indicate that despite the training that the three BETD mathematics graduates in this study received, the level of mathematics taught in a complementary course, such as an ACE, would clearly better equip mathematics teachers to teach proficiently and facilitate access to institutions of higher learning such as universities. The results of the study revealed that there was a need for the implementation of a complementary course to the BETD in mathematics education for teachers of mathematics in Namibia. This study also provided valuable insights into what such a course could look like.
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A picture's worth a thousand words: a case study of grade 10 English language educators teaching visual literacy
- Authors: Leask-Smith, Lyn Ann
- Date: 2009
- Subjects: Visual literacy -- Study and teaching (Secondary) -- Case studies English language -- Study and teaching (Secondary) -- Case studies Teacher educators -- Training of -- Case studies English teachers -- Training of -- Case studies Teachers -- In-service training
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1702 , http://hdl.handle.net/10962/d1003585
- Description: The aim of this research was to better understand teacher's beliefs about visual literacy and to explore how their beliefs influence their teaching practice. In order to investigate this, a case study was conducted that comprised of lesson observations and semi-structured interviews with two secondary school English home language educators. The backdrop to the research was the implementation of the new national curriculum for grade 10. The participants, though well educated and experienced teachers, felt their training had been inadequate in the area of teaching visual literacy and although they acknowledged the importance of visual literacy, it seemed to have a fairly low priority in their actual teaching practice. In particular, very little attention was given to the production of multimodal texts by learners. The reason for this low priority may be related to the requirements of the formal assessment programme as well as limited lesson time in which to cover an extensive curriculum. The research findings would seem to suggest a need for in-service training in this area as well as access to suitable learning support materials and teacher resources.
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A real time HF beacon monitoring station for South Africa
- Authors: Mudzingwa, Courage
- Date: 2009
- Subjects: Radio , Shortwave radio , Radio and television towers
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5486 , http://hdl.handle.net/10962/d1005272 , Radio , Shortwave radio , Radio and television towers
- Description: High frequency, HF (3 - 30 MHz), radio communications are greatly affected by ionospheric conditions. Both civilian and military users need reliable, real time propagation information to show at any time the feasibility of communicating to any part of the world on a particular frequency band. For this thesis, an automated receiving/monitoring station for the Northern California DX Foundation (NCDXF)/ International Amateur Radio Union (IARU) International Beacon Project was setup at the Hermanus Magnetic Observatory, HMO (34.42oS, 19.22oE) to monitor international beacons on 20 m, 17 m, 15 m, 12 m and 10 m bands. The beacons form a world wide multiband network. The task of monitoring the beacons was broken down into two steps. Initially the single band station, at 14.10 MHz, was installed and later it was upgraded to a multiband station capable of automatically monitoring all the five HF bands. The single band station setup involved the construction and installation of the half-wave dipole antenna, construction and installation of an HF choke balun; and the choice of Faros 1.3 as the appropriate monitoring software. The multiband monitoring station set-up involved the installation of an MFJ-1778 G5RV multiband antenna, construction and installation of a Communication Interface - V (CI-V) level converter and configuring the Faros 1.3 software to monitor the beacons on all five HF bands. Then a web page was created on the HMO space weather website (http://spaceweather.hmo.ac.za). Here, the real-time signal to noise ratio (SNR) and short path (SP)/long path (LP) plots are uploaded every 3 minutes, showing real time HF propagation conditions on the five HF bands. Historical propagation data are archived for later analysis. A preliminary data analysis was done to confirm the peration of the monitoring station. The archived data were analysed and compared to ICEPAC (Ionospheric Communications Enhanced Profile Analysis and Circuit) predictions. Results show that the real-time signal plots as well as the archive of historical signal plots, convey information on ropagation conditions to users in terms that are easy to interpret and understand.
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A situational analysis on the public participation processes in integrated water resources management in the Kat River Valley, Eastern Cape, South Africa
- Authors: Naidoo, Merle
- Date: 2009
- Subjects: South Africa. Dept. of Water Affairs and Forestry , Water-supply -- South Africa -- Kat River Valley , Water quality management -- South Africa -- Kat River Valley , Water-supply -- Government policy -- South Africa -- Kat River Valley , Water resources development -- South Africa -- Kat River Valley , Integrated water development -- South Africa -- Kat River Valley , Rural development -- South Africa -- Kat River Valley
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4854 , http://hdl.handle.net/10962/d1005530 , South Africa. Dept. of Water Affairs and Forestry , Water-supply -- South Africa -- Kat River Valley , Water quality management -- South Africa -- Kat River Valley , Water-supply -- Government policy -- South Africa -- Kat River Valley , Water resources development -- South Africa -- Kat River Valley , Integrated water development -- South Africa -- Kat River Valley , Rural development -- South Africa -- Kat River Valley
- Description: Public participation in water management processes is one of the internationally recognised and adopted principles of Integrated Water Resource Management. The South African Department of Water Affairs and Forestry aims to facilitate the decentralisation of water management powers to the local community level via the establishment of regional and local water management institutions, namely Catchment Management Agencies, Water User Associations and Catchment Forums. The National Water Act (No. 36 of 1998) acknowledges that the discriminatory laws and practices of the past have prevented equal access to water and the use of water resources. The contribution of water management institutions to social and economic development, in particular poverty eradication and food security, is mentioned in the water act. The participation of poor rural communities living in the Kat valley, an area where an elite minority reap the benefits of water use for agriculture, is the focus of this research. Their participation, perceptions and experiences are documented and explored to determine how the promulgation of post-apartheid water policy and legislation has affected their access to water. The results of this research are based on data collected from several methods including surveys, workshops and observation. Analysis of these data revealed the complicated and stagnant nature of participation from Kat valley rural communities in local water management initiatives and organisations. Existing water management organisations were not successful in stimulating poor people’s participation as they were unable to address their primary concerns, namely a secure source of potable water, employment and access to water for agricultural purposes. This thesis asserts that the Department of Water Affairs and Forestry, as the custodian of South Africa’s water resources, has not taken on a supportive, accountable role in assisting marginalised communities with improving their access to water for domestic purposes and securing access to water rights for productive use. This, in turn, has led to dissatisfaction among these communities and a wariness of participatory activities that focus mainly on raising environmental awareness. The establishment of effective accountability relationships among all stakeholders, pro-poor water management structures and initiatives, as well as integrated and co-operative management of natural resources, are needed to revitalise the present participation of poor communities living in rural areas.
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A social and cultural history of Grahamstown, 1812 to c1845
- Authors: Marshall, Richard Graham
- Date: 2009
- Subjects: Cities and towns -- Growth -- South Africa -- Eastern Cape Community development, Urban -- South Africa -- Eastern Cape Eastern Cape (South Africa) -- History -- 19th Century Grahamstown (South Africa) -- History -- 19th Century Grahamstown (South Africa) -- History -- Social aspects -- 19th Century Grahamstown (South Africa) -- Social conditions -- 19th Century Grahamstown (South Africa) -- Economic conditions -- 19th Century
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2549 , http://hdl.handle.net/10962/d1002401
- Description: This thesis examines the development of Grahamstown from its inception in 1812 to the mid-1840s, paying particular attention to the social and cultural life of the town. It traces the economic development of the town from a military outpost to a thriving commercial settlement, noting the essential factor of the town's proximity to the Cape frontier in this process. The economic interaction between diverse groups in the town mirrors the social and cultural interaction which occurred between British settlers, Khoekhoe and Africans. The result of these interactions was the creation of a new, distinctively South African urban society and culture, despite the desire of the white settlers to reproduce a “typical” English environment in their new home. The conflict between attempts to anglicise the urban environment and the realities of Grahamstown's situation on a colonial frontier was reflected in the architecture and layout of the town. Attempts to recreate an English social environment also failed. New classes arose in the town in response to the economic opportunities available on the frontier. Although some settlers prospered, many did not, and the presence of an impoverished white working class undermines settler historians' picture of settler success and affluence. The poorest people in the town, though, were the increasing numbers of Khoekhoe and Africans who migrated from the surrounding countryside, and who were unequally incorporated into the urban community as a colonial labouring class. In response to these unique circumstances, white settlers in Grahamstown developed a powerful political and propaganda machine, which helped lay the foundations of a distinct settler identity in the eastern Cape.
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A study of employee satisfaction in two manufacturing facilities of General Motors South Africa
- Authors: Matutoane, Leanetse Paul
- Date: 2009
- Subjects: General Motors Corporation -- South Africa -- Port Elizabeth Job satisfaction -- South Africa -- Port Elizabeth Employee motivation -- South Africa -- Port Elizabeth Employee attitude surveys -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:766 , http://hdl.handle.net/10962/d1003887
- Description: Employed individuals spend a majority of their waking time at work. Therefore, within an individual’s working lifetime, most hours will be spent at work. Subsequently, theories abound purporting that humans are hedonistic beings. Considering that on average people spend most of their working lives in a working environment, it then stands to reason that people should endeavor to be satisfied at work if humans are always in pursuit of happiness. The questions arise as thus: what makes people satisfied at work, does being satisfied with the job result in less turnover, and is that the only reason that they would endeavor to prolong their employment, are older employees more satisfied with their jobs than younger employees, is a plant with an older workforce more satisfied than a similar plant with a younger workforce? This study attempts to find an answer to these and other related questions. It was conducted on employees of two plants of an automotive manufacturer based in Port Elizabeth, a town in the Eastern Cape province of South Africa. The Job Descriptive Index (JDI) was used to collect the feelings of 92 employees in different shops and analyzed to check for differences in satisfaction levels. No significant differences were found between the plants, shops and age categories surveyed.
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A systems approach to mainstreaming environment and sustainability in universities : the case of Rhodes University, South Africa
- Authors: Togo, Muchaiteyi
- Date: 2009
- Subjects: Rhodes University Education, Higher -- South Africa Universities and colleges -- South Africa Universities and colleges -- Environmental aspects -- South Africa -- Case studies Environmental education -- South Africa -- Case studies Sustainable development -- South Africa -- Case studies
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4768 , http://hdl.handle.net/10962/d1007175
- Description: This study is influenced by the objectives of the Mainstreaming Environment and Sustainability in African Universities Partnership which aims to enhance the quality and relevance of university education through implementation of Environmental Education and sustainability across university functions and operations. It contributes to Education for Sustainable Development through the development of tools to assess sustainability in higher education, investigating sustainability practices in universities and proposing strategies for improving mainstreaming of sustainability. It also contributes to systems approaches in mainstreaming contextual sustainability challenges in university functions and operations. The aim of the study was to investigate how universities can mainstream sustainability in their functions and operations in response to contextual sustainability challenges in a changing environment using a systems approach. The research was a case study of Rhodes University in South Africa, which is situated in the impoverished Eastern Cape Province. The study involved 12 teaching departments (representing all faculties at the university), four research units and institutes, five managements units, the Estates Division and the Student Representative Council. The theoretical framework of the study draws from a critical realist ontology and systems thinking epistemology. Systems thinking emphasises the interdependencies of phenomena, thus providing the methodology and tools for a systems view of relationships between education and the environmental context in which it is embedded. Critical realism was employed as an underlabourer to systems thinking as it provides for some of the dimensions absent in systems thinking including its depth ontology which facilitates isolating causal factors influencing empirical reality. It recognises that explanation of phenomena can be embedded in history and acknowledges the fallibility of knowledge. The data collection methods employed in the study include a sustainability assessment using a Unit-based Sustainability Assessment Tool developed as part of the study, interviews, content analyses and observations. Data analyses were performed through employing morphogenetic analysis, and inductive, abductive and retroductive modes of inference. The morphogenetic analysis of social transformation/reproduction was employed to trace the historical emergence of sustainability initiatives at Rhodes University. Induction facilitated reorganisation of the data into themes which particularly represent the main sustainability activities at Rhodes University. Abduction, through recontextualising data in a systems thinking framework, enabled further insights into the phenomena. In the study, it enabled use of systems lenses as a framework and led to identification of systemic issues affecting mainstreaming and later, the development of systems thinking approaches in mainstreaming sustainability. Retroduction enabled identification of causal mechanisms which influenced the emergence of sustainability initiatives at the university. The study established that the emergence of sustainability initiatives at Rhodes University followed the 1990 Talloires Declaration and paralleled international institutional developments in relation to environmental and sustainability challenges. Since then, sustainability initiatives have continuously been emerging in various operational dimensions of the university in line with emerging sustainability challenges which resulted in a morphogenetic cycle. The study revealed that Rhodes University has mainstreamed sustainability across the functions and operations of most of the departments/divisions/units forming part of the study, especially in functions like teaching, research, community engagement and operations. There were a few exceptions like the Human Resources Division and to an extent the Research Office/Management Division which are not yet considering sustainability in their operations. While most of the teaching departments had sustainability initiatives in teaching, research and community engagement, there was diversity in the dimension(s) of sustainable development that the departments addressed and this seemed to relate to the disciplinary content of their subjects. In the Estates Division sustainability initiatives included sustainable landscaping, campus environmental management, water and energy conservation initiatives, waste recycling, use of biodiesel, to mention a few. Students were also involved in various sustainability activities especially through voluntary community engagement initiatives. Sustainability initiatives at the university were also discovered to be embedded within and responding to sustainability challenges of the immediate university environment of Makana District. The study unearthed the causal mechanisms enabling and constraining mainstreaming activities at the university. These were found to be embedded in the history and context within which the university is operating, and other factors related to university structures and agency of lecturers, other employees and students. Examples of these factors are unsustainable patterns in society, policies and the need to redress past inequalities. The study noted the existence of systemic issues at the university which need to be addressed to enable and enhance the promotion of a systems approach to mainstreaming: notably, complexity owing to diversity of approaches employed in mainstreaming, the absence of clearly defined university sustainability goals, problems of institutional support and in some cases, disciplinary governing rules which do not leave room for mainstreaming sustainability. The study established the possibility of improving mainstreaming of sustainability through the adoption of more explicit systems approaches. It suggests use of systems models including the systems-environment model, the functions/structure model and the motion picture model in the process. It recommends making the goal of mainstreaming more upfront, developing a shared understanding of sustainability and mapping out/defining contextual sustainable development issues to grapple with. The study also recommends adopting a holistic approach in mainstreaming, making it a campus-wide initiative, involving all students and developing interdisciplinary curricula. It suggests setting up of supporting mechanisms to strengthen, extend and spearhead mainstreaming and enhancement of collaborative work in sustainable development issues.
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African traditional medicines-antiretroviral drug interactions: the effect of African potato (Hypoxis hemerocallidea) on the pharmacokinetics of efavirenz in humans
- Authors: Mogatle, Seloi
- Date: 2009
- Subjects: Potatoes -- Africa Potatoes -- Therapeutic use Medicinal plants Traditional medicine AIDS (Disease) -- Treatment HIV infections -- Drug therapy Drug interactions Antiretroviral agents Pharmacokinetics Hypoxidaceae -- Therapeutic use High performance liquid chromatography
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3773 , http://hdl.handle.net/10962/d1003251
- Description: African Potato (Hypoxis hemerocallidea), (AP) is an African traditional medicine (TM) that is commonly used for various nutritional/medicinal purposes and also by people infected with the human immuno deficiency virus HIV and AIDS patients as an immune booster. The use of AP has also been recommended by the former Minister of Health of South Africa for use by HIV positive people. The main phytochemical component of AP is a norlignan glucoside, hypoxoside, and other relatively minor components have also been reported. A recent in vitro study reported the effects of AP extracts, hypoxoside and rooperol (the metabolite of hypoxoside) on human metabolic enzymes such as the cytochrome P450 (CYP450) group of enzymes and also on the transporter protein, p-glycoprotein (P-gp). This research focussed on investigating the clinical significance of those in vitro effects on the pharmacokinetics of efavirenz (EFV) in humans. EFV was chosen as the substrate drug because it is in first-line regimen of treatment of HIV/AIDS in South Africa, and also has been reported to be a substrate for the specific CYP isozymes, 3A4 and 2B6, in common with APs metabolic involvement with 3A4. A high performance liquid chromatography method with ultra-violet detection (HPLC-UV) for the quantitative determination of EFV in plasma was developed and successfully validated according to international standards with good reproducibility, accuracy, recovery, linear response and requisite sensitivity. The preparation of the plasma samples for analysis was effected by using a simple and rapid precipitation method, and the mobile phase consisted of readily available solvents. EFV in plasma samples was found to be stable under the relevant storage conditions studied. The oral dose of AP, administered as a freshly prepared traditional decoction, was standardised based on the hypoxoside content, and the quality of all the AP decoctions was analysed immediately prior to administration, using a validated HPLC-UV method. A single dose, two-phase sequential study was conducted over a period of 31 days in 10 healthy volunteers. The clinical study was approved by the Rhodes University Ethical Standards Committee, and all the participants agreed to the conditions of the study by giving their informed consent. On day 1 of the study, human subjects were administered a 600 mg EFV tablet and blood samples were collected before dosing and at various intervals over a period of 48 hr post dosing. From day 16, a traditionally prepared AP decoction was administered daily at a standardized dose of 15 mg/kg/day per subject until day 30. On day 29, volunteers were administered a single 600 mg dose of EFV as was done on day 1. Plasma samples were harvested immediately after blood sample collection and frozen at -80 ºC until assayed. Geometric mean ratios of relevant pharmacokinetic parameters, Cmax (maximum plasma concentration achieved following dosing) and AUC0-48 (area under the curve of a plot of drug plasma concentrations versus time representing the extent of absorption) of EFV before and after co-administration of 14 successive daily doses of AP were compared and evaluated to determine whether an interaction had occurred. All subjects completed the study and the geometric mean ratios of Cmax and AUC0-48 were 97.30 and 102.82 with corresponding 90% confidence intervals (CIs) of 78.81-120.14% and 89.04-118.80%, respectively. Whereas the acceptance criteria for the ratios of the AUCs fell within the preset 90% CIs indicating no interaction, the Cmax ratios fell outside the limits. Although the protocol was developed in accordance with the United States of America Food & Drug Administration’s Guidance for Drug Interactions, a priori stating that both criteria need to fall within the acceptance limits to indicate no interaction, an argument is presented to waive the Cmax requirement for the declaration of an interaction. As a result, the pharmacokinetic data generated during this study indicated that the effect of AP on the pharmacokinetics of EFV is not clinically significant. Hence, co-administration of AP is unlikely to affect the clinical use of EFV. In summary the objectives of this project were: 1. To develop and validate a suitable HPLC-UV method for the quantitative determination of EFV in plasma. 2. To perform a mini-validation of the determination of hypoxoside for use as a marker in the quality control and standardisation of AP decoctions. 3. To conduct a clinical interaction study in order to determine whether AP affects the pharmacokinetics of EFV following concurrent administration. 4. To apply the validated HPLC-UV method to determine plasma concentrations of EFV in plasma of human subjects. 5. To use appropriate statistical methods and treatments such as a non-compartmental pharmacokinetic analysis to determine the occurrence of an interaction.
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An analysis of the money market linkages between South Africa and selected major world economies
- Authors: Barnor, Joel A
- Date: 2009
- Subjects: South African Reserve Bank , Banks and banking, Central -- South Africa , Money market -- South Africa , Monetary policy -- South Africa , Foreign exchange rates -- South Africa , International economic relations , Interest rates -- South Africa , Financial institutions -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:956 , http://hdl.handle.net/10962/d1002690 , South African Reserve Bank , Banks and banking, Central -- South Africa , Money market -- South Africa , Monetary policy -- South Africa , Foreign exchange rates -- South Africa , International economic relations , Interest rates -- South Africa , Financial institutions -- South Africa
- Description: Globalisation and financial liberalisation has increased the linkages across countries in recent times. The existence of money market links has important implications for both domestic monetary policy and for investment decisions. This study examines the linkages between South Africa’s money market and selected major international money markets. The objectives of the study are firstly to examine the links between the repo rate of South Africa and the central bank rates of the EU, Japan, UK and US. Secondly, is to compare the influence of domestic and foreign monetary policy decisions on South Africa’s money market. The third objective is to examine the long run relationship between the South African money market and the money markets of its major trading partners. Three estimation techniques are used to examine the different links. Principal components analysis, four tests of cointegration, and stationarity tests of the spreads/risk premium between South Africa’s interest rates and the interest rates of the other countries. All three techniques show that there is no long-run link between South Africa’s central bank rates and the central bank rates of the other countries. This shows that the repo rate does not depend on movements in other central bank rates. Domestic money market interest rates respond strongly to changes in the repo rate whilst showing no dependence on central bank rates of the other countries. This confirms the autonomy of the South African Reserve Bank in carrying out policy objectives. When the risk premium is accounted for under the third technique, evidence of integration is found. This indicates that the risk premium plays a crucial part in the level of integration between South Africa and the countries included in the study.
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An assessment of the environmental compliance monitoring capacity of the Department of Minerals and Energy, Eastern Cape
- Authors: Watkins, Deidre Ann
- Date: 2009
- Subjects: South Africa. Dept. of Mineral and Energy Affairs Mines and mineral resources -- South Africa -- Eastern Cape Mineral industries -- South Africa -- Eastern Cape Mineral industries -- Social aspects -- South Africa -- Eastern Cape Mineral industries -- Environmental aspects -- South Africa -- Eastern Cape Mines and mineral resources -- Social aspects -- South Africa -- Eastern Cape Mines and mineral resources -- Environmental aspects -- South Africa -- Eastern Cape Environmental auditing -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:728 , http://hdl.handle.net/10962/d1003848
- Description: One of the greatest challenges facing the world today is integrating industrial activities such as mining with environmental integrity and social concerns. Monitoring is fundamental to environmental management, both to assess the adherence to standards and to allow environmental managers to learn from practical experiences. However, a problem arises when the regulatory authorities cannot keep up with their mandate of enforcement and compliance monitoring. This research examined how the Department of Minerals and Energy (DME) implements the concept of sustainable development in the mining sector of the Eastern Cape (EC) and, more specifically, the extent to which the Mine Environmental Management (MEM) section is able to effectively monitor compliance of mining operations with environmental legislation. This was the first systematic compilation of statistical data for the DME, and presents the first study in the EC regional office in terms of environmental sustainability. Results indicate that there has been a sustained increase in mining activity over the past three years, possibly as a result of the boom in the construction industry and the accelerated road maintenance and improvement programmes in the Eastern Cape. Mining applications received by the DME have increased by 47% from 2006 to 2007 (January-May) and by a further 100% from 2007 to 2008. In addition to the increasing number of mining concerns being established, 98 mining concerns will need to apply for the conversion of their old order rights to new order rights by the 1st May 2009. Mining in the province is predominantly small scale with mining permits (mined areas less than 1.5Ha) making up 52.3% of all applications, with larger mining concerns contributing 29.3% and prospecting contributing the remaining 18.4%. In terms of compliance inspections, the EC regional office is required to conduct 120 environmental compliance inspections annually in terms of contributing to sustainable development. The MEM section exceeded this target since 2003. However, when the number of operational mines is considered, 120 inspections per year equates to one mine being visited, on average once every four years (based on 2008 data). Based on projected figures (number of compliance audits and number of operational mines) for 2009, the DME’s target of 150 inspections for 2009/10 combined with the limited staff D. Watkins – MBA Dissertation 2008 capacity will, at best, mean that mines would be inspected once in seven years. However, the target of 150 inspections will not actually even cover the expected number of EMP evaluation inspections. This has serious implications in terms of regulating the compliance of the mining concerns with their EMPR’s. The low level of compliance monitoring can be directly related to staff capacity and logistics problems at the regional office as well as provincial targets being based on staff capacity rather than the number of operational mines. Thus, considering potential environmental damage associated with mining operations and the capacity constraints of the MEM to conduct frequent compliance audits, it is likely that mining operations will have negative implications for sustainable development in the region. Currently there are many challenges facing the DME in terms of contributing positively to sustainability in the mining sector and there is a need to base future actions on the idea of continuous improvement and ultimately progress.
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An assessment of the experience of small town local economic development in the Eastern Cape Midlands
- Authors: Pio, Elizabeth
- Date: 2009
- Subjects: Small cities -- South Africa -- Eastern Cape , Economic development -- South Africa -- Eastern Cape , Community development -- South Africa -- Eastern Cape , City planning -- Economic aspects -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:4888 , http://hdl.handle.net/10962/d1015464
- Description: This thesis is an assessment of the experience of small town local economic development in four towns namely Graaff-Reinet, Somerset East, Aberdeen and Pearston situated in the Eastern Cape Midlands, South Africa. It aims firstly to provide a critical overview of these selected small town economies before evaluating their local responses to the changing economic climate. The study is contextualized within the framework of locality development and emphasizes the heterogeneity of small towns with regards to physical, socio-economic, demographic and historical elements. From this, the original economic reasons for existence of these small towns are ascertained and then the major changes that occurred are identified. Amongst other aspects, the changes in the agricultural sector, the demographic changes particularly with regard to the significant increase in the urban population and the fluctuations in the quantity and types of businesses have all played a part in transforming the small towns' economies. As a result of these changes and many external driving forces such as changes in the regional and national economy, there are many severe challenges facing these small towns especially regarding the high unemployment rate, the associated poverty, HIV/AIDS and the low volume or absence of private investment into these localities. The responses of these small towns to the daunting challenges that they face have been considered in terms of Local Economic Development (LED) strategies that have been implemented. The LED initiatives in each town are examined in the context of their general characteristics, objectives, achievements and challenges. Emphasis is placed on Somerset East as it is the only town in the study area that has a development agency actively promoting various forms of LED. What has ultimately been established is: in all four towns, LED is not making a significant or meaningful difference and that natural market and economic forces play an important role in shaping and dictating the local economy. Somerset East is the only town where the economy could potentially be restructured with the proposed mega market-led approach to tourism and planning in the form of the Boschberg Development node. Four sectors perceived to be required for locality development are considered in this study, namely the export sector, the human resources, the local service sector and the government agencies. It is ascertained that although these sectors need to be part of a symbiotic relationship to promote and enhance economic development, they are not present in all the towns and as a result development, at both a household and a macro town level, is further hindered. Ultimately, these small towns in the Eastern Cape Midlands defy the notion that they are dying. 'Growth' and 'decline' have been two central features throughout this thesis and one of the biggest contradictions and challenges that these small towns face is the population growth with a declining or stagnant economy that cannot accommodate the increased number of people.
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An assessment of the relationship between organisational climate and organisational commitment within the IT department of a telecommunications company
- Authors: Saunders, John
- Date: 2009
- Subjects: Corporate culture Organizational behavior Management -- Employee participation Employees -- Attitudes
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:729 , http://hdl.handle.net/10962/d1003849
- Description: The main objective of this study was to assess the relationship between organisational climate and organisational commitment within the Information Technology department of a South African Telecommunications company. Firstly, the research considered the organisational climate from a qualitative perspective. Research interviews that were based on organisational climate literature were performed with 4 members of the relevant department. Qualitative data analysis revealed several themes. The themes highlighted include: perceived ineffective structure and decision-making; lack of mistake tolerance; risk aversion by employees; recognition and reward systems perceived to be inadequate; performance management is perceived to be ineffective and inadequate; Employee Share Options Program (ESOP) perceived to have a negative influence on employee behaviours; the nature of the social environment perceived to be unfriendly; low level of knowledge and skills sharing; inadequate human resource management practices; These findings highlight the importance of certain aspects within the environment that influence employee perceptions. Organisational climate literature suggests that organisational climate has various behavioral influences and its consideration is essential in the effective functioning of the organisation. Secondly, the research considered the relationship between organisational climate and organisational commitment within the relevant department. The Patterson et al. (2005) Organisational Climate Measure (OCM®) and Meyer and Allen (1991) Organisational Commitment Questionnaire (OCQ) were used to assess the relationship between organisational climate and organisational commitment, respectively. Significant correlations were found between integration, pressure to produce, innovation, supervisory support, reflexivity, clarity, involvement, autonomy, welfare and tradition, and both affective and normative commitment, Training was only significantly correlated to affective commitment. No significant correlations were found with continuance commitment.
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An evaluation of the brand campus concept implemented at Mercedes-Benz South Africa: a case study
- Authors: Samkange, Tichaona
- Date: 2009
- Subjects: Mercedes-Benz of South Africa DaimlerChrysler -- South Africa Consumer satisfaction Case studies -- South Africa Product management Case studies -- South Africa Brand name products -- Management Case studies Brand name products -- Valuation Case studies Marketing Case studies -- South Africa Brand choices Case studies -- South Africa Customer preferences Case studies -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:741 , http://hdl.handle.net/10962/d1003861
- Description: Primarily, this research study was concerned with the evaluation of the brand campus concept implemented at then DaimlerChrysler South Africa in 2002, as a case study. Pretoria-based Mercedes-Benz South Africa (Pty) Ltd. (MBSA) is a subsidiary of global vehicle manufacturer Germany’s Daimler-Benz AG (DBAG). They are responsible for assembling, distributing and retailing, certain Mercedes-Benz and Mitsubishi vehicle brands, and spare parts. The landmark 1998 DaimlerChrysler global ‘merger of equals’ was preceded by the 1995 joint venture between Mercedes-Benz and Mitsubishi Motor Corporation. Consequently, three brands (Mercedes-Benz, Chrysler and Mitsubishi) were retailed and marketed under DaimlerChrysler South Africa (Pty) Ltd. (DCSA), positioned next to each other in the same showroom. This report identifies key challenges stemming from this approach, namely: brand strength dilution, more than 80 multi-franchised dealers and multi-branded showrooms, service capacity problems, old working environment and infrastructure, and perceived intra-brand competition. The research evidence suggests that these problems prompted then DCSA to launch the 2000 Dealer Network Strategy (DNS). In the grand scheme of things, the DNS intervention entailed partitioning the dealer network into five brand centres in five metro regions, and eighteen market centres in the rural areas. The brand campus concept was borne out of DNS and proved to be a masterstroke since, the primary focus was on streamlining the retail facilities for DCSA vehicle sales, service and spare parts for both the passenger and commercial vehicles. This study highlights key pillars of the brand campus concept, namely: profitability, brand focus, customer orientation and diversity. The challenge was to address seven major drivers of the brand campus concept, namely: after-sales vehicle support, vehicle service capacity, lead-times, spare parts availability, sales information propagation, behavior of sales personnel and the overall vehicle dealership appearance. Semi-structured interviews constituted part of the evaluation based on the perspectives of five customers, three dealer principals and two MBSA marketing executives. The research evidence, which also came from MBSA documentation and direct observation, shows that this innovative concept has been remarkably successful.
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An evaluation of the quality of customer service delivery offered by the East London public transport commuter rail service provider (operated by Metrorail)
- Authors: Bosch, Colin
- Date: 2009
- Subjects: Railroads -- Customer services -- South Africa -- Eastern Cape Transportation -- Customer services -- South Africa -- Eastern Cape Railroads -- Quality control -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:744 , http://hdl.handle.net/10962/d1003865
- Description: The aim of this survey is to evaluate the quality of customer service delivery offered by the East London public transport commuter rail service provider Metrorail, a division of the state owned enterprise (SOE) PRASA. The former tolerant rail commuter has become increasingly frustrated at the ever-decreasing quality of rail service delivery. This is evidenced by increasing incidents of commuter arson to failed rail assets and the practice is considered to be a strategy to enforce the replacement of unreliable infrastructure and ineffective/reactive management controls. The objectives of the research are guided by three fundamental service quality indicators. In order to evaluate these indicators, the research focuses on whether the quality of customer services provided by Metrorail meets commuter expectations, whether commuters rank five dimensions of service quality differently and whether the level of service quality provided is perceived differently amongst the various demographic commuter segments. Service organizations which are highly interactive, labour-intensive, reliant on a number of service providers, required to perform at various locations and have high intensity/volume operations, will be susceptible to failure; Metrorail services fall into this category. The legacy of the apartheid era regime and strategy resulted in poor rail planning and underfunding. Commuter rail operations in South Africa are fraught with a myriad of inadequacies of the past that only now manifest. As a consequence, their ability to operate effectively and efficiently is impaired. The situation is further exacerbated by the global economic crisis of 2008 and the impact of constricted budget allocations by the State to all SOE's which could further impede the interventions and innovation required to improve service quality. The in-depth literature review provided sufficient information relating to a wide array of service organizations similar in nature to Metrorail. This information is translated into useable knowledge and recommendations from which Metrorail can benefit. The research methodology is clearly articulated and the data analysis ensures distinct findings which are discussed in the final chapter. The research undertaken identifies and prioritises the service quality attributes and dimensions that will require redress to improve overall service quality. The findings are clearly defined from which a set of recommendations are suggested.
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An examination of an incentive system to maximize performance in an automobile manufacturing environment
- Authors: Fourie, Dawie
- Date: 2009
- Subjects: Daimlerchrysler -- South Africa -- Eastern Cape Incentives in industry -- South Africa -- Eastern Cape Automobile industry and trade -- South Africa -- Eastern Cape Automobile industry workers -- South Africa -- Eastern Cape -- Performance Performance -- Management -- South Africa -- Eastern Cape -- Case studies Employee motivation -- South Africa -- Eastern Cape -- Case studies Goal setting in personnel management -- South Africa -- Eastern Cape -- Case studies Achievement motivation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:745 , http://hdl.handle.net/10962/d1003866
- Description: This investigation was undertaken to explore an incentive system to maximize performance in an automotive manufacturing environment. The unit under study was a motor manufacturing company in the Eastern Cape in South Africa. The approach to this investigation was to start with a quantitative analysis to identify if there was a relationship between the incentive reward and employee satisfaction. This was to be done by correlation analysis between the Job Descriptive Index (JDI) and the performance related incentive reward (PBR) of the abovementioned company. The data was then used to develop an interview guide, which was used in a focus group study, to evaluate the current incentive system as a motivator of performance. The analysis of the qualitative interview data was to be done through the use of thematic analysis. Using a percentage based estimation per production line, 150 workers were selected from the 2100 shop floor workers. The Job Descriptive Index (JDI) questionnaires were used to measure the satisfaction index of the workers. The performance data was gathered from the company's incentive statistics over the past year, 2004. All other related data was obtained though thematic analysis by the researcher, who was interested to get the insiders' view. From the emic perspective, more data could be obtained by the researcher by probing with follow-up questions. After both the quantitative and qualitative procedures were completed, the results of the study were found to be much the same as those described in the reviewed literature. The quantitative analysis did not prove a significant correlation between incentive reward and satisfaction; and employees were most satisfied with work, supervision and co-workers and less satisfied with pay and promotion. The qualitative procedure (thematic analysis) highlighted that the current reward system was not motivating performance, but rather demoralised employees, as it was used as a punitive measure to encourage work attendance. The current system also confirmed the error made by many organisations, where the organization purely concentrates on motivating employees with extrinsic rewards and little thought is given to intrinsic recognition.
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An exploration of problems experienced in the interpretation of word problems by grade 12 learners
- Authors: Neshuku, Christian N
- Date: 2009
- Subjects: Education (Secondary) -- Namibia Word problems (Mathematics) Teachers -- Training of -- Namibia Curriculum planning -- Namibia Mathematics -- Study and teaching (Secondary)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1951 , http://hdl.handle.net/10962/d1008206
- Description: This research sought to investigate the problems experienced in the interpretation of word problems by senior secondary school learners, in particular to see how the language used in the articulation of word problems affects the interpretation. The study was conducted in a school in the Oshikoto region of Namibia, a school located in a semi-rural area of Namibia, and selected owing to the accessibility of the required participants. The research was located within an interpretive paradigm focusing on a study sample of 40 learners from a specified class in the selected school. Data were collected through written tests and a semi-structured interview based on written tests, and a comprehensive descriptive analysis of test results was prepared. The findings of the study indicate that the language in which the word problem was articulated did not make a difference. The performance in both English and Oshindonga tests was almost the same. The findings also indicate that vocabulary, syntactic interpretation, semantic relationships, algebraic skills, and practical sense making in relation to real-life are all important for the successful interpretation and solving of word problems. In view of these findings, the study has provided valuable insights into aspects of the teacher education curriculum that need to be revisited in order to improve the training of teachers In teaching word problems.
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An illustrated information leaflet for low-literate HIV/AIDS patients on antiretroviral therapy : design, development and evaluation
- Authors: Ramela, Thato
- Date: 2009
- Subjects: Antiretroviral agents -- South Africa HIV-positive persons -- Care -- South Africa AIDS (Disease) -- Study and teaching -- South Africa HIV infections -- Treatment -- South Africa AIDS (Disease) -- Treatment -- South Africa AIDS (Disease) -- Africa, Sub-Saharan -- Statistics Communication in medicine -- South Africa Communication in public health -- South Africa
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:3834 , http://hdl.handle.net/10962/d1007563
- Description: South Africa's HIV prevalence rate is estimated to be 5.7 million and at the end of2007 a total of 45845 HIV/AIDS adult patients were taking antiretroviral therapy (ART). The global incidence of HIV/AIDS has been slowly decreasing over the years but is still widespread. This disease is still more prevalent in sub-Saharan Africa than in other parts of the world, with more than 60% people living with HIV/AIDS. Highly active antiretroviral therapy (HAART), the treatment of choice, slows the progression of the human immunovirus but demands a high adherence rate in excess of 95%. Patients who are poorly informed about antiretrovirals (ARVs) and misunderstand medicine-taking instructions or experience unexpected side effects may interrupt therapy, predisposing them to the development of resistance. Such patients need information but, given the poor literacy skills prevalent in South Africa, written information is often not fully comprehended and is often written at too high a reading level. The objectives of this research project were to design, modify and evaluate HIV / AIDS patient education materials for low-literate isiXhosa speaking adults residing in Grahamstown and to examine their impact on the understanding of various aspects of the disease and its treatment. Pictograms illustrating common side effects of ARVs (e.g. stavudine, efavirenz, lamivudine), as well as various sources 'for purchasing nonprescription medicines, storage and medicine-taking instructions were designed and evaluated both qualitatively, using group discussions, and quantitatively through individual interviews where interpretation of the pictograms was assessed. These pictograms were incorporated in a patient information leaflet (PIL) which had been specifically designed for people with limited reading skills and was a simple document containing the minimum of essential text. A previously developed PIL was modified in collaboration with the target population and two versions were produced, one incorporating pictograms illustrating side effects, the other with none. Pictograms were used in both to illustrate other medicine-taking instructions. The PILs were tested objectively to assess the readability, format, content, and general design. They were translated into isiXhosa prior to being qualitatively and quantitatively evaluated in a low-literate isiXhosa speaking population. Understanding of the PILs was assessed by asking a series of questions about the PIL content. Participant opinion of the readability and appearance of the PIL was recorded. The relationship between PIL understanding and selected demographic variables was investigated. Findings from this study illustrated that well designed pictograms assist in the location of information in written leaflets and they may enhance understanding of the information. It was further demonstrated that education influences total understanding of PIL content thus emphasizing the need for tailor-written information in accordance with the education level of the target population. A desire to receive PILs incorporating pictograms was expressed by the majority of participants. Collaboration with the intended target population is essential to design culturally acceptable, easily interpreted pictograms and to produce user-friendly, easy-to-read, comprehensible patient education materials. The rigorous, iterative design, modification and testing process described in this study is one that should be adopted in producing all health-related education materials.
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An institutional analysis of community and home based care and support for HIV/AIDS sufferers in rural households in Malawi
- Authors: Munthali, Spy Mbiriyawaka
- Date: 2009
- Subjects: AIDS (Disease) -- Patients -- Care -- Malawi HIV-positive persons -- Care -- Malawi HIV infections -- Malawi Home-based family services -- Malawi Community health services -- Malawi Community development -- Malawi Economic development -- Malawi
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:985 , http://hdl.handle.net/10962/d1002719
- Description: Standard economic models often emphasize inputs, outputs and an examination of the structures in order to conduct an economic performance evaluation. This study applies the Institutional and Development Framework (IAD) in the broader context of New Institutional Economics (NIE) in order to examine the transaction costs of delivering Community and Home Based Care and Support (CHBC) to HIV/AIDS sufferers. For purposes of unveiling the empirical reality guiding decision making processes in the CHBC service delivery, comparative qualitative research techniques of normative variable and concept formation have been adopted to draw out the relative institutional influences from the HIV/AIDS national response partnerships. The study identifies the conflict between the predominantly standardized and more rigid formal management techniques adopted by key members of the national response and the informal cultural techniques familiar to the rural communities, and a lack of motivational incentives in the CHBC structures as the key factors against CHBC capacities to draw external funding for service delivery. CHBCs are also weakened by incoherent governance structures at the district level for facilitation of funding and information flow exacerbating the community vulnerability. Rationalization of the institutional arrangements and a clarification of roles from district to community levels, a shift of focus to facilitation of informal techniques and an integration of performance enhancing incentives are the critical policy insights envisaged to spur CHBCs to work better.
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