Thesis (M. Tech.) - Central University of Technology, Free State, 2006 / Occupational noise affects industries in many countries around the world, and there is strong evidence from previous research linking it to noise-induced hearing loss (NIHL). More than 30 million workers in the United States of America alone were exposed to hazardous noise at the workplace before 1998. In South Africa, workers are not supposed to be exposed to a noise rating limit at or above 85dB(A). Abattoir employees are subjected to high noise levels when compared to the occupational noise rating limit of 85dB(A). Noise is generated from various mechanised and manual processes and activities in the abattoir during the slaughter of different animal species. Noise sources include conveyers, circular saws, air conditioners and pumps, pneumatic and other mechanical equipment. The aim of this study was to characterise noise exposure in different grades of abattoirs during the slaughter of cattle and sheep. The grading of abattoirs was previously done according to Grade A-E. Grade A-C is now referred to as high throughput abattoirs while Grade D and E are referred to as low throughput abattoirs. Personal and environmental noise exposure levels of workers in Grade A, C and D abattoirs in the Free State were therefore investigated. Noise measurements were done in accordance with the methods stipulated in the South African National Standards (SANS) Code of Practice 10083. Environmental and personal sampling were conducted with a calibrated Type 1 Quest integrated sound level meter (ISLM) and a Quest noise dosimeter respectively. Calibration was checked before and after taking measurements to ensure reliability and validity of results. The average noise exposure level in the high throughput abattoirs was above the recommended standard of 85dB(A). In the low throughput abattoirs the noise exposure levels were below this level. There were no statistically significant differences between the noise exposure levels during the slaughter of different species (P>0.05), or between Grade A and Grade C (P>0.05). There was a statistically significant difference (P<0.05) however between Grade A and Grade D noise exposure levels. The results indicate that workers in Grade A and C abattoirs are exposed to unacceptable noise levels. Further research is recommended to include all categories of abattoirs and to determine the impact of noise exposure on the worker’s hearing in order to develop strategies to protect employees from the effects of excessive exposure to noise.

Thesis (M.Tech.) - Central University of Technology, Free State, 2007 / The latest technological trend worldwide, is automation. Reducing human labour and introducing robots to do the work is a pure business decision. The reason for automating a plant can be some, or all, of the following: Improve productivity Reduce labour and equipment costs Reduce product damage System reliability can be monitored Improves plant safety When the automation process is started, Automatic Guided Vehicles (AGVs) will be one of the first commodities that can be used. The reason for this is that they are so versatile. They can be programmed to follow specific paths when moving material from one point to another and the biggest advantage of all is that they can operate for twenty four hours a day. Automatic Guided Vehicles are developed for many different applications and therefore many different types of AGVs are available. All AGVs are equipped with sensors so that they are able to “see” what is happening around them. Since the AGV must be able to function without any human help or control, it must be able to navigate through the work environment. In this study a remote control car was converted to an AGV and thorough research was done on the different types of sensors that can be used to make the AGV more intelligent when it comes to navigating in an unknown environment.

Thesis (M.Tech.) - Central University of Technology, Free State, 2006 / The ultimate goal regarding this research was to make an intelligent learning machine, thus a new method had to be developed. This was to be made possible by creating a programme that generates another programme. By constantly changing the generated programme to improve itself, the machines are given the ability to adapt to there surroundings and, thus, learn from experience. This generated programme had to perform a specific task. For this experiment the programme was generated for a simulated PIC microcontroller aboard a simulated robot. The goal was to get the robot as close to a specific position inside a simulated maze as possible. The robot therefore had to show the ability to avoid obstacles, although only the distance to the destination was given as an indication of how well the generated programme was performing. The programme performed experiments by randomly changing a number of instructions in the current generated programme. The generated programme was evaluated by simulating the reactions of the robot. If the change to the generated programme resulted in getting the robot closer to the destination, then the changed generated programme was kept for future use. If the change resulted in a less desired reaction, then the newly generated programme was removed and the unchanged programme was kept for future use. This process was repeated for a total of one hundred thousand times before the generated program was considered valid. Because there was a very slim chance that the instruction chosen will be advantageous to the programme, it will take many changes to get the desired instruction and, thus, the desired result. After each change an evaluation was made through simulation. The amount of necessary changes to the programme is greatly reduced by giving seemingly desirable instructions a higher chance of being chosen than the other seemingly unsatisfactory instructions. Due to the extensive use of the random function in this experiment, the results differ from one another. To overcome this barrier, many individual programmes had to be generated by simulating and changing an instruction in the generated programme a hundred thousand times. This method was compared against Genetic Algorithms, which were used to generate a programme for the same simulated robot. The new method made the robot adapt much faster to its surroundings than the Genetic Algorithms. A physical robot, similar to the virtual one, was build to prove that the programmes generated could be used on a physical robot. There were quite a number of differences between the generated programmes and the way in which a human would generally construct the programme. Therefore, this method not only gives programmers a new perspective, but could also possibly do what human programmers have not been able to achieve in the past.

Thesis (M. Tech.) - Central University of Technology, Free State, 2007

Thesis (M. Ed. ) - Central University of Technology, Free State, 2014 / The aim of this study was to investigate the English Language Proficiency of non-English speaking learners in the Foundation Phases. An in-depth literature study was conducted to investigate this phenomenon. The historical background of language provision in South-African schools, the issue of language and cognition and different aspects of mother tongue education was touched on. The implicaitons of the current situation of the Language of Teaching and Learning (LoLT) for teaching and learning in South Africa was also covered. A qualitative research design and methodology were deemed appropriate to explore the challenges and strategies used by Foundation Phase teachers to enhance the English language proficiency of their learners. The research findings of the empirical investigation were presented in accordance with themes and categories that emerged from the data during the thematic analysis of the eight semi-structured individual interviews. The main concerns of the participants regarding the way to address challenges were presented. The complexity of this phenomenon pictured in my mind. The research findings lived up to my expectations and confirmed what was found in my literature study. Hence I came to realise that the experiences of the participating teachers were extremely important in reaching the conclusions of this research. The major research findings and meaningful issues came to light from the literature review and the empirical evidence. Finally recommendations are put forward for the consideration of Foundation Phase teachers, schools and the Department of Education (DoE) when dealing with the proficiency of their learners.

Thesis (M. Ed. (Education )) - Central University of Technology, Free State, 2014 / This study investigates mediation of learning in Grade 10 Business Studies. Mediation of learning is one of the roles that have to be fulfilled by educators in the teaching and learning situation. Learning theories that focus on teaching and learning provide insight about the study under investigation. Aspects such as teaching, learning, constructivism, mediation of learning, teaching strategies, teaching and learning through different learning theories and assessment for learning are dealt with. A qualitative research design is employed in this study. Data is gathered through observations of Grade 10 Business Studies lessons and questionnaires completed by Grade 10 Business Studies educators. Purposive sampling is used to sample the participants for this study. Ten schools in the Lejweleputswa district and ten Business Studies educators from these schools are sampled. Data is analysed qualitatively and emerging trends are reported on and interpreted. Observations in the study indicated that most Grade 10 Business Studies educators do not implement mediation of learning in their lesson presentations. Learners are mostly passive listeners in the classrooms. Most educators indicated that they implement mediation of learning in their lessons, although observations portrayed the opposite. Educators are in need of training to be successful mediators of learning. Conclusions and recommendations are made regarding mediation of learning in Grade 10 Business Studies classrooms.

Abstract not available. / Thesis (M.A.)-University of KwaZulu-Natal, Durban, 2008.

This study looks at the National Citizens' Technology Forum (NCTF), a modified version of the consensus conference, which took place in March, 2008 in six cities across the U.S. to understand how inclusive these methods of public participation are in practice. The research focused on two of these sites. Inclusion of participants was defined in terms of presence, voice and being heard. Transcripts of the audio-visual recordings of the proceedings were the main data of analysis. By focusing on the talk within these deliberative forums, the study looked at how the rules of engagement and status (ascribed and achieved) differences between participants can affect inclusion. The analysis did not reveal any substantial effects of ascribed characteristics on deliberation. Facilitation and the presence of expertise among the participants were found to influence inclusion and equality among participants. These findings suggest that organizers and facilitators of deliberative exercises have to be reflexive of their role as well as aware of the group dynamics. The results also address the larger questions within science and technology policy like the role of expertise and the public in decision making, the institutional design of participatory exercises, and their relation to the political culture and the policy process.

Univ., FB Sozialwiss., Diss. u.d.T.: Brinckmann, Andrea: Zur Entwicklung von Systemforschung und Politikberatung in der Bundesrepublik Deutschland--Hamburg, 2004.

Tez (Yüksek Lisans) - Süleyman Demirel Üniversitesi, Sosyal Bilimler Enstitüsü, İşletme Anabilim Dalı, 2007. / Kaynakça var.