Doctor of Philosophy(PhD) / This thesis is concerned with the theoretical and practical development of a surface-based mapping algorithm for reliable and robust localization and mapping in prior unknown and unstructured environments. A surface-based map consists of a set of compressed surfaces, processed and represented without geometrical modelling. Each surface in the surface-based map represents an object in the environment. The ability to represent the exact shapes of objects via individual surfaces during the mapping process makes the surface-based mapping algorithm valuable in a number of navigation applications, such as mapping of prior unknown indoor and outdoor unstructured environments, target tracking, path planning and collision avoidance. The ability to unify representations of the same object taken from different viewpoints into a single surface makes the algorithm capable of working in multi-robot mapping applications. A surface-based map of the environment is build incrementally by acquiring the 3D range image of the scene, extracting the objects' surfaces from the 3D range image, aligning the set of extracted surfaces relative to the map and unifying the aligned set of surfaces with surfaces in the map. In the surface unification process the surfaces representing the same object are unified to make a single surface. The thesis introduces the following new methods which are used in the surface-based mapping algorithm: the extraction of surfaces from 3D range images based on a scanned surface continuity check; homogenization of the representation of the non-homogenously sampled surfaces; the alignment of the surface set relative to a large set of surfaces based on surface-based alignment algorithm; evaluating the correspondence between two surfaces based on the overlap area between surfaces; unification of the two surfaces belonging to the same object; and surface unification for a large set of surfaces. The theoretical contributions of this thesis are demonstrated with a series of practical implementations in different outdoor environments.

Within the educational psychology literature there is an abundance of research in the field of metacognition. The concentration of this research however has been in primary and secondary school contexts with little attention given to tertiary students' understanding or use of metacognition; there has been even less attention to whether age is a factor in tertiary students' perceptions of their metacognitive processes. The primary purpose of this study was to explore the perceptions of two distinct groups of first year university students, towards their understanding and usage of metacognitive processes and strategies. The two groups defined were traditional school leavers and mature age students. The findings from the exploration of these perceptions were compared to ascertain the similarities and differences in metacognitive processes between the two cohorts. The data collected for this study were obtained through a process of individual face-to-face in- depth interviews. The choice of this methodology was deliberate in order to gather rich data about the students' perceptions and experiences rather than attempt to measure their levels of metacognition against some predetermined standard. Data were collected and analyzed on the two constructs of metacognition which were identified in the literature search. These were metacognitive knowledge and metacognitive control. A range of affective variables such as self efficacy, motivation and expectancy of success, which impact on students' metacognitive abilities and processes, were also considered in the data collection and analysis. The findings indicated that age was a factor in determining some differences and similarities in students' perceptions of their own and others metacognitive processes. In certain cases the traditional school leavers' recency of experience with formal study was deemed an advantage; in others the life experience of the mature age students was perceived an advantage. In some instances the age of the student had no discernable impact on their understanding of, and ability to, utilize metacognitive strategies. These findings assist to broaden the understanding of student perceptions of metacognition in the tertiary context. The findings also make it imperative that tertiary institutions make fewer assumptions about the skills and abilities of their commencing students based on the criterion of age and offer more opportunities to assist students to understand the value of developing and improving their metacognitive processes.

Doctor of Philosophy(PhD) / This thesis is concerned with the theoretical and practical development of a surface-based mapping algorithm for reliable and robust localization and mapping in prior unknown and unstructured environments. A surface-based map consists of a set of compressed surfaces, processed and represented without geometrical modelling. Each surface in the surface-based map represents an object in the environment. The ability to represent the exact shapes of objects via individual surfaces during the mapping process makes the surface-based mapping algorithm valuable in a number of navigation applications, such as mapping of prior unknown indoor and outdoor unstructured environments, target tracking, path planning and collision avoidance. The ability to unify representations of the same object taken from different viewpoints into a single surface makes the algorithm capable of working in multi-robot mapping applications. A surface-based map of the environment is build incrementally by acquiring the 3D range image of the scene, extracting the objects' surfaces from the 3D range image, aligning the set of extracted surfaces relative to the map and unifying the aligned set of surfaces with surfaces in the map. In the surface unification process the surfaces representing the same object are unified to make a single surface. The thesis introduces the following new methods which are used in the surface-based mapping algorithm: the extraction of surfaces from 3D range images based on a scanned surface continuity check; homogenization of the representation of the non-homogenously sampled surfaces; the alignment of the surface set relative to a large set of surfaces based on surface-based alignment algorithm; evaluating the correspondence between two surfaces based on the overlap area between surfaces; unification of the two surfaces belonging to the same object; and surface unification for a large set of surfaces. The theoretical contributions of this thesis are demonstrated with a series of practical implementations in different outdoor environments.

In this study the impact of the UNISA HIV/AIDS training programme on participants' learning and involvement in their respective communities was explored. The UNISA HIV/AIDS programme comprises Modules 1, 2 and 3. Module 1 focuses on orientation and background to HIV/AIDS Care and Counselling, Module 2 on HIV/AIDS counselling skills and Module 3 on train the trainer in HIV/AIDS education and counselling. This study focused only on Modules 1 and 2. Kirkpatrick's model of evaluating education and training programmes was used as a framework to evaluate the programme. Participants for the study consisted of 116 students who attended the UNISA HIV/AIDS Module 2 workshops between December 2005 and December 2006. The study was conducted in two phases, the first phase during the workshops, where participants were asked to indicate both quantitatively and qualitatively how they experienced Module 1 and Module 2 as well as what they learnt in the two modules. The participants' involvement in HIV/AIDS work prior and post Module 2 training as well as the aspects of the programme that are being applied within their work in the community was assessed during the second phase of the study, which took place during 2007. The results of the study indicate that the programme has successfully equipped participants with the necessary HIV/AIDS information and skills. The programme has further empowered participants to engage in HIV/AIDS education and counselling in their communities. Participants' attitudes towards the disease and towards those infected and affected by HIV/AIDS were challenged, resulting in less stigmatization and discrimination. The programme further challenged participants to start adopting health protective behaviours. The present study concludes that for HIV/AIDS programmes to be effective, they need to include, amongst other things, a well-researched basic HIV/AIDS factual information section, a component on attitudes and one on skills (particularly linked to behaviour change). These should be presented in an interactive way, engaging the participants in active learning. / Psychology / D. Litt. et Phil. (Psychology)

Effective implementation of the principles of the National curriculum Statement (NCS) for Life Orientation has various requirements. Thus, with a specific focus on Life Orientation in grade 10, the study aimed at investigating various issues around the implementation of these principles. To this end, a mixed-methods approach was used. In the quantitative phase, questionnaires were used. In the qualitative phase, focus groups and interviews were used to collect data. Similar questions were asked in both phases. The sample was a group of 48 Life Orientation teachers from 48 secondary schools in the Gauteng West district. Ethical issues were considered. Techniques to ensure validity and reliability were also taken into account. The results showed that, in general: • the introduction of the NCS in Life Orientation had resulted in too much paperwork and administration for the teachers; • the principles of the NCS had not helped to transform education from the apartheid era system of education to the present democratic system of education; • the teachers were poorly trained with regard to implementing the principles of the NCS in the sense that there were not enough workshops and follow-up support provided; • the principles of the NCS were not implemented at schools, among others because there were problems with the distribution of policies to the teachers via the school management; • the implementation of the principles of the NCS did not make the envisaged impact on learner attitudes since the attitudes of many learners were often negative; • the implementation of the principles of the NCS did not make the envisaged impact on learner respect for other cultures; • the principles of the NCS did not have the ideal impact on morals, values and standards; or impact significantly on crime rate, learner pregnancy or disrespect at school; and• the principles of the NCS did not support learners well to acquire life skills. • However, the principles of the NCS in Life Orientation were more successful with regards to helping address barriers to learning. In line with the above, recommendations were made and the limitations of the study were pointed out. / Further Teacher Education / D. Ed. (Curriculum Studies)

The purpose of this study was to evaluate the impact of philanthropic interventions in public high schools in Mutasa district of Zimbabwe. Three research questions guided the study. The investigation focused on finding out the types of philanthropic interventions in the public high school and to evaluate their impact on the schools and students involved from an educational management perspective. The investigation was a mixed methods research using both quantitative and qualitative methods. Data was collected by questionnaire, interview and documentary sources. Principals of twenty nine high schools responded to a questionnaire. Interview data was gathered from two representatives of non-governmental organisations. One NGO also provided documents for more data. Two individual philanthropists from the district were also interviewed. The results of the study indicate that philanthropic interventions have made significant improvements to the physical infrastructure of some schools. During the 2014 study there were about 700 students from poor backgrounds on various school fees assistance programmes. School enrolment and completion rates have increased. School drop-outs have decreased. Over 6 500 former beneficiaries of fees from one donor organisation have formed an alumni association to assist other children in disadvantaged circumstances. It is strongly recommended that schools in the district and elsewhere use online social network platforms to organise alumni associations from a wider catchment area beyond national borders. Alumni associations are a potentially rich source of philanthropic revenue hardly tapped in the district. Schools should create their own websites to be exposed to a global audience of donors for possible funding of their projects. / Educational Leadership and Management / D. Ed. (Education Management)

The thesis Analysis of a particular investment project - the construction of new buildings and office space is to evaluate the effectiveness of the investment options elected by the selected evaluation methods. Variants of investments are assessed by the average cost, modified pay-back period and modified the discounted pay-back period. In a further evaluation of options is determined the tax savings of each option and its impact on the total cost of investment. On the basis of all methods and procedures are selected one variant of the investment. Finally, evaluate the sustainability of the investment options selected in the operational phase.

The diploma thesis deals with assessing the synergistic effects of the selected consolidated entity. The analytical part consists of a valuation of the current economical situation in the particular consolidated entity. The thesis determines appropriate indicators of evaluating the synergic effect. The results of these indicators demonstrate the existence of synergy.

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This diploma thesis deals with the quality of the output of publicly available machine translation engines: Amazon Translate, Bing Translator, Deep L and Google Translate. The aim of the thesis was to qualitatively compare each machine translation engine and to test their capabilities on several types of texts - expressive, informative and operative. The analysis is carried out on translations of German texts into Czech. The thesis consists of two parts, in the theoretical part we discuss the origin and development of machine translation, its types, the automatic machine translation engines which are the object of our research, and we present a two-stage model for evaluating the quality of translation. In the empirical part, the results of the analysis based on the models of K. Reiß and A. Torrens are presented. These results show that the listed machine translation engines can be ranked from the highest to the lowest level of output quality as follows: Deep L, Google Translate, Bing Translator and Amazon Translate. Furthermore, it also turns out that the error rate correlates with the creativity of the text.