Philosophiae Doctor - PhD / This thesis is a comparative study of competing education and training (ET) policy options in South Africa today. The thesis examines the economic and ET policy proposals of the South African state, and in particular, the recently published National Training Strategy and Education Renewal Strategy. These documents are both critically examined and contrasted with the policy proposals which are currently emerging in the African National Congress (ANC) and Congress of South African Trade Unions (Cosatu). The analysis establishes a continuum of ET systems, with the policy proposals of the South African state representing a <low-skill equilibrium' system and the Framework for Lifelong Learning document of the ANC/ Cosatu reflecting a more highskill equilibrium' orientation. A <macro-institutional' theoretical perspective is employed throughout the thesis, an approach which combines a focus on the e macro' structural features of capitalist society with an analysis of the vast nexus of interlocking social institutions existing at the sub-structural level. This macro-institutional approach is particularly evident in the manner in which two key theoretical themes have been foregrounded throughout the text. The first has to do with the central macro' question of the market/state relation and its relevance for ET. The second has to do with the e institutional' dynamic of" the interaction between the ET system, the labour market and the organisation of work and the manner in which this interaction mediates the impact of ET on society and economic performance. The strength of the <macro-institutional' perspective is that it emphasises that the reform of ET in isolation of other societal changes is insufficient in the pursuit of higher productivity and improved economic performance. What is essential is comprehensive reform: reforms which impact on a whole range of key institutional locations. This requires coherent and long-term planning, a form of governance most often obtained by consensual co-ordinated market economies and seldom under free market conditions. The conclusion to this thesis suggests that the ANC/ Cosatu economic and ET proposals are more likely to obtain comprehensive reform' of the South African social structure than those proposals emanating from the current state.

The thesis deals with the analysis of technology used during the design of headphones with integrated active ambient noise cancellation and examines the possibilities of using adaptive filters to simplify development and achieve more effective attenuation.

INTRODUCTION. The perinatal mortality rate is of concern worldwide. In South Africa at the time of the study, 2000, it was estimated to be of the order of 40/1000 live births. However in the setting in which this study took place, namely Tembisa, (Ekhuruleni, Gauteng, South Africa) it was said to be 50/1000 live births. One of the patient- related avoidable factors that has been found to be associated with perinatal and to a lesser extent maternal mortality, is either no, or late initiation of antenatal care. It has been found in an area which, is in many respects similar to Tembisa that 50% of women go the private general practitioner (PGP) for confirmation of pregnancy but, due of lack of funds, do not continue care with the private practitioner but, initiate care in the public sector and in a proportion of these women, this is at an advanced gestational age, making it difficult to prevent or intervene if there are problems in the pregnancy. As (PGP’s) are well placed in the district to render antenatal care, it was decided to perform a study looking at the effect of involving them in the antenatal care of women who presented to them for confirmation of pregnancy. METHODS Sixteen general practitioners agreed to be part of the study. The women who confirmed their pregnancy and who were going to deliver in Tembisa hospital were included in the study after giving written informed consent. They comprised the intervention group, the first antenatal visit was performed, the findings were recorded on the antenatal card which is used in the public sector and which was introduced to the private practitioner at 2 workshops held by the Department of Obstetrics and Gynaecology, University of Pretoria prior to the study. The woman was then to attend antenatal care with the private practitioner until delivery. The private general practitioners waived the costs normally associated with this care for the period of the study. The control group consisted of the women who confirmed their pregnancies in the public health care sector known as the public service health care workers group (PSHCWG). Data collection took place in the postnatal ward of Tembisa hospital over the period of 3 months. By means of systematic sampling, 100 cards from the PGPG and 100 cards from the PSHCWG were obtained. The 2 groups were compared with respect to gestational age at initiation of care and a modified version of the Quality Check for Antenatal Records Score (MQCARS), an audit score which, when applied to the antenatal card, gives a measure of the effectiveness of record keeping, and whether problems in the antenatal period are detected and appropriately managed. RESULTS. There was a statistically significant difference between the two groups in terms of gestational age at initiation of care [PGPG mean gestational age -19.96 (5.86), PSHCW 25.96(5.98,) p<0.0001]. The majority of women in the PGPG initiated care in the 2nd trimester (79%) while the majority of the women in the PSHCWG (53%) confirmed their pregnancies in the third trimester. Six per cent of PGPG confirmed their pregnancies in the first trimester compared to the PSHCWG (3%). The two groups differ significantly with respect to the total MQCARS with the PGPG group performing better [(8.16 (1.55) vs. 16.34(2.58), p<0.0001]. The associated sub- scores are statistically different [History score 5.99 (0.10) vs.7 (0.96), Examination score 9.59(1.29) vs.8.03 (1.85) Interpretation Score 2.55(0.50) vs.2.80 (0.49)]. CONCLUSION Despite the limitations of the study it is felt that if private general practitioners in Tembisa are involved in the antenatal care of those women who confirm their pregnancies with them, there is a reduction in the gestational age at initiation of care. There is a small difference between the two groups in record keeping, detection and management of problems. / Dissertation (MCur)--University of Pretoria, 2011. / Nursing Science / unrestricted

This dissertation puts into historical context allegations of farm labour abuse during the period 1948 to 1960 on the eastern Transvaal Highveld. It not only gives an exposition of these events, but importantly analyses these allegations of abuse in the context of the South African government’s intervention into farm labour for this period. The dissertation, however, first gives an overview of the government’s policies of regulating and providing farmers with black labour in the period 1910 to 1948. It deals specifically with the dubious measures introduced and coercive actions taken by the National Party government after 1948 to provide farmers with “cheap and plentiful labour”. The reactions to the accusations of abuse by the South African government, the farmers, the conservative, liberal and leftist press, and other independent bodies, such as the churches, Black Sash and the South African Institute of Race Relations, are also explored. The reaction of the African National Congress and the Potato Boycott launched in 1959 by this organisation in response to the mistreatment of farm labourers, also receives specific attention. It concludes with a discussion of how the farm labour scandals and the reaction during the 1950s and more specifically the Potato Boycott of 1959 are still relevant today by considering the contested nature of the commemoration of this event in 2009 AFRIKAANS : Hierdie verhandeling plaas bewerings van die misbruik van plaasarbeid gedurende die periode 1948 tot 1960 op die oostelike Transvaalse Hoëveld in historiese konteks. Dit bied nie net ‘n uiteensetting van hierdie gebeure nie, maar ontleed dié bewerings van mishandeling teen die agtergrond van die Suid-Afrikaanse regering se ingryping ten opsigte van plaasarbeid vir dié tydperk. Die verhandeling bied ten eerste ‘n oorsig van die regering se beleid van die regulering en voorsiening van swart arbeid aan boere gedurende die periode 1910 tot 1948. Dit handel spesifiek oor die twyfelagtige dwangmaatreëls wat deur die Nasionale Partyregering na 1948 geïmplementeer is om boere van “goedkoop en voldoende arbeid” te voorsien. Die reaksies op die bewerings van mishandeling deur die Suid-Afrikaanse regering, die boere, die konserwatiewe, liberale en linkse pers, as ook ander selfstandige instansies, soos die kerke, Black Sash en die Suid-Afrikaanse Instituut van Rasseverhoudinge word ook ondersoek. Die reaksie van die African National Congress en die aartappelboikot wat deur die organisasie in 1959 van stapel gestuur is in reaksie op die mishandeling van plaaswerkers, work ook ontleed. Die studie sluit af met ‘n bespreking van hoe die plaasarbeidskandale, die reaksie in die 1950s en meer spesifiek die aartappelboikot van 1959, steeds vandag relevant is teen die agtergrond van die omstrede herdenking van die gebeurtenis in 2009. / Dissertation (MHCS)--University of Pretoria, 2011. / Historical and Heritage Studies / unrestricted

Philosophiae Doctor - PhD / This study begins with an ethnographic self-study which allows for a reflection on traditional learning experiences. This study is located in the context of the initial development of dental health professionals within those higher education institutions that endeavour to provide education and training in a rapidly changing context. This context is characterised by the simultaneous need to address the blurring of boundaries and the dichotomies that exist such as the first world and the third world, the developed and the less developed world, the rich and the poor, health and wealth, the private and the public sectors, the formal and the informal sectors, the advantaged and the disadvantaged, the privileged and the underprivileged. The definitions, concepts, theories and principles around curricula and professional development are examined in an effort to extend into discoveries of educational research usually beyond the purview of dental health practitioners, policy makers or higher education specialists involved in training these dental health practitioners. It poses key questions regarding the nature of professional competences within dental health science undergraduate studies and how the curricula are organised around these perceptions of competence. Investigative tools include participant observation, interviews and questionnaires which have included both education deliverers - the teaching staff - and education consumers - the students. The areas of access by students to programmes (input), activities whilst in the programmes (throughput) and their competences at the exit end of the programme (output) are examined. It was found that institutions and programmes are paradoxically positioned declaring missions to be globally competitive and internationally recognised and at the same time wanting to reach out to the population who are disadvantaged and who form a majority. Whilst the needs of the wider community is for basic dental services and primary health care, the resources appear to be geared for producing technologically-superior professionals who will cater for a largely urban and middle class populations. The resources available, particularly human resources, for this training, are going through a critical shortage. Simultaneously demands are being made to challenge the epistemological rationale of the curriculum practice of the training sites at both universities and technikons (now known as universities of technology). These findings reveal that the SAQA demands and the proposed transformation of higher education provided an impetus for schools and departments within universities and technikons and their institutes to look at educational concepts and to transform curricula. This shift was found to be hampered by a variety of causes which included territorial protection, lack of a deep understanding of the education and training concepts and lack of human, physical and financial resources. It was also found that traditional designs of programmes are locked into tribal boundaries which restrict movement beyond these. The boundaries are ring-fenced by historical legacies and practices which confine programmes within these borders and continue to cement the fragmented development of dental health science professionals. The education and training of the different dental health science occupational categories are fragmented between institutes, within institutes and with three separate professional regulating bodies and, seemingly, disjointed functioning national and provincial departments of health and education. This (education and training) is found to be dominated by the traditional mould of teaching, learning and assessment with pockets of change in some schools and departments. Teaching units in the form of subjects, which operate as discrete units and remain entrenched by the habituations of subjects and departments within schools, restricts movement in the competence-based direction. The framework offered by this thesis sets broader and more fluid principles and guidelines which embody the notion of knowledge, skills, attitudes and values and which course designers and educators can utilise so that renewed ways can emerge for their programmes. This allows for a cross over into each other's territories (regulatory, institutional and the health and educational services) that will allow for courses to be designed more holistically and rationally with appropriate transformatory potential.

An active noise control (ANC) system has been applied to the problem of attenuating low-frequency tonal noise inside small enclosures. The intended target application of the system was the reduction of the engine firing frequency inside heavy equipment cabins. The ANC system was based on a version of the filtered-x LMS adaptive algorithm, modified for the minimization of acoustic energy density (ED), rather than the more traditional minimization of squared acoustic pressure (SP). Three loudspeakers produced control signals within a mock cabin composed of a steel frame with plywood sides and a Plexiglas® front. An energy density sensor, capable of measuring acoustic pressure as well as acoustic particle velocity, provided the error signal to the control system. The ANC system operated on a single reference signal, which, for experiments involving recorded tractor engine noise, was derived from the engine's tachometer signal. For the low frequencies at which engine firing occurs, experiments showed that ANC systems minimizing ED and SP both provided significant attenuation of the tonal noise near the operator's head and globally throughout the small cabin. The tendency was for ED control to provide a more spatially uniform amount of reduction than SP control, especially at the higher frequencies investigated (up to 200 Hz). In dynamic measurement conditions, with a reference signal swept in frequency, the ED control often provided superior results, struggling less at frequencies for which the error sensor was near nodal regions for acoustic pressure. A single control channel often yielded performance comparable to that of two control channels, and sometimes produced superior results in dynamic tests. Tonal attenuation achieved by the ANC system was generally in excess of 20 dB and reduction in equivalent sound level for dynamic tonal noise often exceeded 4 dB at the error sensor. It was shown that temperature changes likely to be encountered in practice have little effect on the initial delay through the secondary control path, and are therefore unlikely to significantly impact ANC system stability in the event that a fixed set of system identification filter coefficients are employed.

Active Structural Acoustic Control (ASAC) is a subcategory of the more widely known field of Active Noise control (ANC). ASAC is different from traditional ANC methods because it seeks to attenuate noise by altering the noise producing structure instead of altering the acoustic waves traveling through the air. The greatest challenge currently facing ASAC researchers is that a suitable parameter has not yet been discovered which can be easily implemented as the minimization quantity in the control algorithms. Many parameters have been tried but none effectively attenuate the sound radiation in a way that can be easily implemented. A new parameter was recently developed which showed great potential for use as a minimization quantity. This parameter has been termed the "weighted sum of spatial gradients" (WSSG) and was shown by previous researchers to significantly reduce noise emissions from a vibrating simply supported plate in computer simulations. The computer simulations indicate that WSSG-based control provides as good or better control than volume velocity and does so with a single point measurement which is relatively insensitive to placement location. This thesis presents the experimental validation of the WSSG computer simulations. This validation consists of four major components. First, additional research was needed in to extend the use of WSSG from computer simulations to experimental setups. Second, the WSSG-based control method was performed on simply supported plates to validate the computer simulations. Third, the WSSG-based control method on was used on clamped plates to validate the computer simulations, and fourth, the WSSG-based control method was validated on plates with ribs. The important results are discussed and conclusions summarized for each of these sections. Recommendations are made for future work on the WSSG parameter.

Komatsu Forrest AB have a demand for a media solution where the user can select between different input sources as well as output channels. The input sources are Radio, Bluetooth, AUX, two microphones and PC. The system shall also be able to mix sound from an ANC unit (Active Noise Control). Due to the demands from the company, the system must be able to be digitally controlled. The goal is to present a concept that offers the solution for these demands.To specify the needs from the user a dialog with employees with more knowledge about the user’s use have resulted in a table. From this a technical design has been created and resulted in a technical design requirement. With the design structure as a base, simulations have been done. After the structure has been verified by simulations a prototype with the basic functions have been designed and programmed and verified to clarify the function.Simulations and measurements have shown that the design works as desired. The result shows that the unit can meet the requirements set by the company in a user-friendly manner. The project has resulted in different solutions and these evaluated for pros and cons compared to the chosen solution. / Komatsu Forest AB behöver en multimedialösning för att uppfylla specifika behov exempelvis simultant användande av två mobiltelefoner och två mikrofoner. Enheten ska klara av att hantera ljud från flertalet ljudkällor samt två mikrofoner och aktiv bullerreducering. Systemet ska styras digitalt från till exempel en PC. Målet är att presentera ett koncept som erbjuder en lösning för dessa problem.Utformningen av enheten har gjorts genom att utvärdera användarens bruksområden tillsammans med den vision som legat till grund för projektet. Detta har genom samtal med anställda på företaget medfört en sammanställning över förarens användnings-områden. Utifrån denna sammanställning av användningsområdena har en teknisk skiss för enhetens uppbyggnad möjliggjorts. Efter att funktionen för skissen har verifierats med simuleringar har ett prototypkort för enhetens grundstomme konstrueras, programmerats samt verifierat konstruktionen.Simuleringar och mätningar verifierar att konstruktionen fungerar som önskat. Resultatet visar att enheten skulle uppfylla de uppsatta önskemålen på ett bra och användarvänligt sätt. Då flera lösningar har tagits fram under projektets gång diskuteras för och nackdelar med dessa samt motiveras varför den valda lösningen är bäst anpassad.

The purpose of this study was to identify and describe factors that affect the utilisation of antenatal services by pregnant adolescents in Muheza district, Tanzania. Quantitative, descriptive study was used. The Andersen and Newman Framework of Health Services Utilisation were used as a conceptual framework. The study population consisted of 235 adolescents who delivered in the Muheza district while attending postnatal clinics and health centres providing reproductive health services between January 2012 and March 2012. The findings revealed a high percentage of under- utilisation of ANC due to low level of education, low individual and household income, inadequate knowledge about sexuality and poor attitudes towards reproductive health services as exemplified by low prevalence of contraceptive use. The distance from clinic, the use of family planning methods, source of antenatal care and having more than four children under 16 years were associated with adequate utilisation of antenatal services. Recommendations were made to promote antenatal services usage by pregnant adolescents in Tanzania. / Health Studies / M.A. (Public Health)

The study attempted to identify factors influencing women’s preference for home births in the Mutare District, Zimbabwe. A quantitative, descriptive, exploratory, cross sectional survey, gathering data by conducting structured interviews with 150 women, was used. All 150 women attended antenatal clinics but did not deliver their babies at health care facilities. The research results indicated that home deliveries might decline if: • the hospital/clinic fees were reduced or removed • transport would be available for women in labour to reach hospitals/clinics • shelters were built for pregnant women at hospitals/clinics • clinics were well equipped and had sufficient numbers of midwives • women had received more effective health education on the advantages of institutional deliveries and on the danger signs of pregnancy/labour complications • nurses/midwives would treat patients respectfully. Unless these factors are addressed, the number of home deliveries might not decline, and the high maternal/infant mortality and morbidity rates in this district will persist. / Health Studies / M. Public Health