In a changing South Africa with a new education system, it has become necessary to determine the degree to which multicultural guidance is provided in secondary schools. The aim of the research was to: • Identify by means of a literature study, the principles of multicultural guidance in a number of countries abroad; • determine empirically, the degree to which the principles of guidance are applied in multicultural schools in the Gauteng Province. To this end concepts such as culture, ethnicity, race, racism, multicultural education, guidance and multicultural guidance had to be described. An historical approach to multicultural education and the research with regard to multicultural guidance were described at length. The development of school guidance in multicultural schools in South Africa was subsequently discussed in more detail, especially the implementation of an effective guidance programme in multicultural schools. An in-depth discussion with regard to the principles of guidance in general and of multicultural guidance in particular, as well as guidance in multicultural schools, were highlighted. An empirical investigation was done by means of frequency tables, correlation coefficients and factor analyses. These were subsequently interpreted: The most important finding was that multicultural guidance in secondary schools does not receive its due. Several deficiencies were identified in this regard. It is recommended that the Gauteng Education Department should pay specific attention to specialised training programmes in that province. The time has come that the Head of Department : Guidance/Guidance teacher should make certain theoretical as well as practical changes to guidance. Multicultural guidance should be ethically-founded. Multicultural perspectives should be built into education, and specifically into guidance programmes. Each person should realise that South Africa and especially education, are moving towards a multicultural future and this requires acceptance and acknowledgement of each other, regardless of culture. / Thesis (MEd)--PU for CHE, 1998

In a changing South Africa with a new education system, it has become necessary to determine the degree to which multicultural guidance is provided in secondary schools. The aim of the research was to: • Identify by means of a literature study, the principles of multicultural guidance in a number of countries abroad; • determine empirically, the degree to which the principles of guidance are applied in multicultural schools in the Gauteng Province. To this end concepts such as culture, ethnicity, race, racism, multicultural education, guidance and multicultural guidance had to be described. An historical approach to multicultural education and the research with regard to multicultural guidance were described at length. The development of school guidance in multicultural schools in South Africa was subsequently discussed in more detail, especially the implementation of an effective guidance programme in multicultural schools. An in-depth discussion with regard to the principles of guidance in general and of multicultural guidance in particular, as well as guidance in multicultural schools, were highlighted. An empirical investigation was done by means of frequency tables, correlation coefficients and factor analyses. These were subsequently interpreted: The most important finding was that multicultural guidance in secondary schools does not receive its due. Several deficiencies were identified in this regard. It is recommended that the Gauteng Education Department should pay specific attention to specialised training programmes in that province. The time has come that the Head of Department : Guidance/Guidance teacher should make certain theoretical as well as practical changes to guidance. Multicultural guidance should be ethically-founded. Multicultural perspectives should be built into education, and specifically into guidance programmes. Each person should realise that South Africa and especially education, are moving towards a multicultural future and this requires acceptance and acknowledgement of each other, regardless of culture. / Thesis (MEd)--PU for CHE, 1998

The field of infrared (IR) detector technology has shown vast improvements in terms of speed and performance over the years. Specifically the dynamic range (DR) and sensitivity of detectors showed significant improvements. The most commonly used technique of implementing these IR detectors is the use of charge-coupled devices (CCD). Recent developments show that the newly investigated bipolar complementary metal-oxide semiconductor (BiCMOS) devices in the field of detector technology are capable of producing similar quality detectors at a fraction of the cost. Prototyping is usually performed on low-cost silicon wafers. The band gap energy of silicon is 1.17 eV, which is too large for an electron to be released when radiation is received in the IR band. This means that silicon is not a viable material for detection in the IR band. Germanium exhibits a band gap energy of 0.66 eV, which makes it a better material for IR detection. This research is aimed at improving DR and sensitivity in IR detectors. CCD technology has shown that it exhibits good DR and sensitivity in the IR band. CMOS technology exhibits a reduction in prototyping cost which, together with electronic design automation software, makes this an avenue for IR detector prototyping. The focus of this research is firstly on understanding the theory behind the functionality and performance of IR detectors. Secondly, associated with this, is determining whether the performance of IR detectors can be improved by using silicon germanium (SiGe) BiCMOS technology instead of the CCD technology most commonly used. The Simulation Program with Integrated Circuit Emphasis (SPICE) was used to realise the IR detector in software. Four detectors were designed and prototyped using the 0.35 µm SiGe BiCMOS technology from ams AG as part of the experimental verification of the formulated hypothesis. Two different pixel structures were used in the four detectors, which is the silicon-only p-i-n diodes commonly found in literature and diode-connected SiGe heterojunction bipolar transistors (HBTs). These two categories can be subdivided into two more categories, which are the single-pixel-single-amplifier detectors and the multiple-pixel-single-amplifier detector. These were needed to assess the noise performance of different topologies. Noise influences both the DR and sensitivity of the detector. The results show a unique shift of the detecting band typically seen for silicon detectors to the IR band, accomplished by using the doping feature of HBTs using germanium. The shift in detecting band is from a peak of 250 nm to 665 nm. The detector still accumulates radiation in the visible band, but a significant portion of the near-IR band is also detected. This can be attributed to the reduced band gap energy that silicon with doped germanium exhibits. This, however, is not the optimum structure for IR detection. Future work that can be done based on this work is that the pixel structure can be optimised to move the detecting band even more into the IR region, and not just partially. / Dissertation (MEng)--University of Pretoria, 2013. / Electrical, Electronic and Computer Engineering / unrestricted