Thesis (M. Tech.) - Central University of Technology, Free State, 2006 / A multi-threaded, multi-agent image recognition software application called RecMaster has been developed specifically for the purpose of quality control in a production environment. This entails using the system as a monitor to identify invalid objects moving on a conveyor belt and to pass on the relevant information to an attached device, such as a robotic arm, which will remove the invalid object. The main purpose of developing this system was to prove that a desktop computer could run an image recognition system efficiently, without the need for high-end, high-cost, specialised computer hardware. The programme operates by assigning each agent a task in the recognition process and then waiting for resources to become available. Tasks related to edge detection, colour inversion, image binarisation and perimeter determination were assigned to individual agents. Each agent is loaded onto its own processing thread, with some of the agents delegating their subtasks to other processing threads. This enables the application to utilise the available system resources more efficiently. The application is very limited in its scope, as it requires a uniform image background as well as little to no variance in camera zoom levels and object to lens distance. This study focused solely on the development of the application software, and not on the setting up of the actual imaging hardware. The imaging device, on which the system was tested, was a web cam capable of a 640 x 480 resolution. As such, all image capture and processing was done on images with a horizontal resolution of 640 pixels and a vertical resolution of 480 pixels, so as not to distort image quality. The application locates objects on an image feed - which can be in the format of a still image, a video file or a camera feed - and compares these objects to a model of the object that was created previously. The coordinates of the object are calculated and translated into coordinates on the conveyor system. These coordinates are then passed on to an external recipient, such as a robotic arm, via a serial link. The system has been applied to the model of a DVD, and tested against a variety of similar and dissimilar objects to determine its accuracy. The tests were run on both an AMD- and Intel-based desktop computer system, with the results indicating that both systems are capable of efficiently running the application. On average, the AMD-based system tended to be 81% faster at matching objects in still images, and 100% faster at matching objects in moving images. The system made matches within an average time frame of 250 ms, making the process fast enough to be used on an actual conveyor system. On still images, the results showed an 87% success rate for the AMD-based system, and 73% for Intel. For moving images, however, both systems showed a 100% success rate.

Thesis (M. Tech. (Agirculture)) -- Central University of Technology, Free State, 2015

Thesis (M. Tech. (Diagnostic Radiography)) Central University of Technology, Free State, 2014 / Over the past two decades, interventional radiology has been a fast developing field with great advances in technology in the diagnosing and treatment of patients. Interventional radiology procedures are minimally invasive and require little to no hospitalisation time. These procedures are fluoroscopically guided and serial runs are used for documentation, so they have the potential to deliver high doses to patients. Reports about deterministic skin reactions resulting from interventional radiology have become more and more prevalent from the early 1990s. Worldwide concern thus led to legislation for the limitation, justification and optimisation of these doses. Setting of diagnostic reference levels (DRLs) for these procedures is difficult, as they can be complex in nature and are often clinically open-ended. In the case where DRLs were used, they needed to be for a specific locality and had to be refined for the specific circumstances. Patients must be informed of the doses they will be receiving during diagnostic or interventional procedures before consent can be obtained from them. Little information on dose audits was available for South Africa at the time of the study, and it was decided to determine dose ranges at a local level. The research question of this study was: “What radiation doses do patients receive when undergoing vascular, diagnostic and interventional procedures in the interventional suites at a tertiary training hospital in the Free State?” The primary objective was to determine the doses and dose ranges to patients. A secondary objective was to identify specific high dose procedures to individual patients and to the population. A third objective was to investigate the factors influencing these doses. The data of patients who received procedures in two fluoroscopic rooms at the research site were documented over a three-year period. The dose area product (DAP) values were used to calculate skin dose. With the information gathered, dose ranges for frequently performed procedures were determined and specific high dose procedures to individuals and the population identified. Factors influencing the dose were also investigated. This included the relationship of the level of technology, a VI patient’s BMI and practitioners’ level of experience on dose as the research site was a training facility. The results indicated that both diagnostic and interventional procedures have the potential to deliver high doses, as was evident with the isolated occurrences where the response threshold for deterministic effects was exceeded. Most of the locally performed procedures delivered lower or on par radiation dose, compared to values in the literature. Increased BMI values of patients can negatively influence doses received. The level of a practitioner’s experience also plays a vital role in the dose that the patient will receive. Specific recommendations and the implementing of a dose optimisation protocol are proposed to reduce and optimise doses at the research site. This dose optimisation programme will create greater awareness about radiation dose and effects, follow-up procedures and dose reduction methods amongst role-payers. Key words: interventional radiology; limitation, justification and optimisation of radiation dose; deterministic effects; radiation dose awareness

Thesis (M. Tech.) - Central University of Technology, Free State, 2006 / Electron microscopy plays an important role in diagnostic histopathology. When this investigation is anticipated, extra tissue is submitted directly for electron microscopy. However, often it is decided only later in a problematic case to perform this investigation and then the only tissue available is embedded in the routine laboratory’s paraffin block. This tissue has to be retrieved from the wax and this entails using a clearing agent before the rest of the electron microscopy method can be implemented. Traditionally xylene is the agent that is used but has the disadvantage of being extremely toxic. This study compared the morphological effects of a relatively new and non toxic clearing agent, Tissueclear®, with that of xylene. Exposure of tissue to clearing agents for 30 minutes and overnight was performed to assess whether Tissueclear® gave better results in the long term than xylene, in the hope that the laboratory turn around time could be improved and the amount of toxic reagents used in the EM laboratory will be reduced. A second part of the study involved a questionnaire submitted to laboratory staff to assess their knowledge of xylene toxicity. Of the 325 cases submitted for electron microscopy at Universitas Hospital between January 2004 and July 2005, 140 of these had to be retrieved from paraffin wax. Four specimens were prepared from each case. Two were processed in xylene for 30 minutes and overnight and two in Tissueclear® for 30 minutes and overnight. The specimens were evaluated for consistency and resin compaction as well as ultrastructural preservation of the cell membrane, cytoplasmic content and extracellular material. The results showed that Tissueclear® and xylene gave comparable results after 30 minutes and that Tissueclear® was superior after overnight processing. This meant that a specimen submitted for electron microscopy would be processed immediately without waiting for the following morning as was the case with xylene and that the processing time for such a specimen had been shortened from 3 to 2 days. It also meant that the laboratory staff was exposed to one less toxic reagent. The results on the questionnaire showed that there were large areas of ignorance regarding toxicity as well as appropriate safety procedures that need to be followed in the laboratory. It is hoped that this study will improve awareness in this regard and encourage the use of other newer less toxic reagents.

Thesis (M. Tech.) - Central University of Technology, Free State, 2007 / Malaria and the mosquito that induces the disease in humans have hounded the military for decades. Malaria represents one of the most important infectious disease threats to deployed military forces. Malaria in soldiers has a serious economic impact, both in terms of lost productivity and treatment cost for the state. A contingent of South African National Defence Force members has been deployed in Burundi since November 2001, as part of a peacekeeping mission. At the time of the study no information was available regarding the prevalence of malaria among military personnel during deployments in Burundi and East Africa. In Africa, the saying is that malaria is the disease of poverty and a cause of poverty. To combat malaria, it is of vital importance that the recommended medication be taken exactly as prescribed and that the course is completed. However, one of the greatest challenges facing the African continent in the present fight against malaria is drug resistance. The discovery of Mefloquine and the subsequent development of suitable drugs, have been intimately associated with military imperatives, contingencies and requirements. Since World War II, the development of Chloroquine-resistant falciparum malaria has driven the search for new drugs. Mefloquine, developed by the Walter Reed Army Institute of Research in the United States, was first shown effective as a prophylaxis and treatment of resistant falciparum malaria in the 1970’s. To obtain data, questionnaires were administered to SANDF soldiers deployed in Burundi, East Africa. The total size of the population under investigation was 336 with a final sample size of 111 respondents. The sample was selected by using simple random sampling. The questionnaire aimed to determine the perception of respondents regarding the malaria threat, their compliance with taking the medication, and their experiencing of possible side-effects which might occur due to the chemoprophylaxis and the prophylactic efficacy of Mefliam®. The fact that, of the 111 people who used Mefliam®, only four presented with any malaria symptoms, is an indicator that Mefliam® is an effective option as an antimalarial drug to be used in East Africa and Burundi. The results of this study will be used by the personnel of the South African National Defence Force (SANDF) and other military forces deployed in East Africa. It is envisaged that the results will be used by military policy- and decision-makers as a control programme and by others involved in the control of malaria. The findings and recommendations should also be of interest to anyone visiting the area.

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

Published Article / This paper reports on a mixed methods study that investigated access to, use, and perceptions of current and emerging technologies among Information Technology (IT) staff and students at universities of technology (UoTs) in South Africa. Fifty-eight IT staff and 410 IT students from 4 UoTs participated in the study. The primary research instrument was an online survey questionnaire, which was supplemented by semi-structured interviews with 31 of the study participants. Web investigations and conversations with IT support staff from UoTs also formed part of the mixed methods employed in the study. The findings of the online survey are analysed both from individual institutional perspectives and in aggregate form representative of the sector as a whole. Cross tabulations are used to analyse the data across institutions. The quantitative analysis reveals interesting trends and patterns in how students and staff are taking advantage of the potential held by Information and Communication Technologies (ICTs) for teaching and learning and for use in their daily lives. The qualitative findings question the assumptions that have been made about a digital divide between digital native students and their digital immigrant lecturers, suggesting that we need to develop a more sophisticated understanding of the role that technologies play in the lives of both students and staff. Results indicate that while students are very enthusiastic about using various ICTs and Web 2.0 tools, most have still to be convinced about their use for formal academic functions. Academic staff, on the other hand, continues to be cautiously optimistic about the use of ICTs in teaching and still harbour a number of concerns.

Submitted in fulfilment of the requirements of the Master of Technology Degree in Library and Information Studies, Durban University of Technology, 2011. / This study investigated the impact of the digital divide on information literacy (IL) training of Extended Curriculum Programme (ECP) students at the Durban University of Technology (DUT). There are students entering the tertiary education environment in South Africa who have never used the Internet or have little or no knowledge of technology. Hence South African higher education institutions have a heterogeneous mix of both digitally advantaged students and digitally disadvantaged students. The objective of this study was to investigate the impact of the digital divide on IL training of ECP students at the DUT and to recommend guidelines for teaching and learning of IL that would accommodate both digitally advantaged and digitally disadvantaged students. The sub-objectives of the study were: to identify in what ways the digital divide impacts on the IL training of ECP students; to identify innovative teaching and learning methods to accommodate the diversity of students in the IL classroom; and to recommend guidelines for teaching and learning of IL in the ECP that accommodates the digital divide among participating students. Hence, the three population sets for the study were: DUT ECP students of 2010, Subject Librarians teaching IL to ECP students and the DUT ECP Coordinator. The study employed a mixed method approach in its research design. Data was collected from ECP students by means of a questionnaire, an interview schedule was used to collect data from Subject Librarians involved in teaching of the IL module to ECP students and lastly, a separate interview schedule was used to collect data from the ECP Coordinator. Qualitative data that was collected from the survey questionnaire was analysed using SPSS (Version 18.0) whilst qualitative data collected from the interviews and from the questionnaires was analysed thematically using content analysis. The findings of this study reveal that the digital divide does impact on IL training in ways such as, slowing down the progress of IL lessons; basic computer skills need to be taught in the IL classroom and that disadvantaged students find it difficult to follow online lessons while advantaged students already have the expertise to access online information. Based on these findings the study recommends that computer literacy training precede IL training; that various creative teaching and learning methods, such as, group work, games, online tutorials and interactive websites be incorporated into IL training to accommodate both digitally advantaged and digitally disadvantaged students in the IL classroom.

Thesis (M.A. (Information Studies)) --University of Limpopo, 2018 / A large number of first year entering undergraduate students at tertiary institutions at Tshwane University of Technology lack skills and competencies for accessing relevant academic information for their assignments and other academic projects they are engaged in. To overcome this problem academic libraries at this institution organise Information Literacy Training Programme (ILTP) to equip students with such skills and competencies. This research investigated if there is any impact that ILTP has among first year entering undergraduate students attached to the Faculties of Humanities and Management Science, who have attended this programme at Tshwane University of Technology, at Polokwane campus. The study adopted both quantitative and qualitative research approaches through a questionnaire and focus group interview respectively to measure the information literacy skills and competencies of first year entering students before and after t attending ILITP.The study sought to measure (a) Students’ perception of information literacy; (b) Students’ ability to use library resources; (c) Students familiarity with different library resources before and after attendance of the programme. The study found that most of the first entering students had a different perception of information literacy. Furthermore, the student’s abilities to use library resources and their familiarity with library resources were very little before they attended the programme. It was only after they attended the programme that they were familiar with some of the library resources and their abilities to use those resources improved. Therefore this study discovered that ILTP has a positive impact of the academic success and performance of first entering students, even though it is minimal.The study recommends that information literacy education for students should be continuous so that students should not lose focus of what they have learnt in the formal Information Literacy Training Programmes. Furthermore, teaching of information literacy should be compulsory to all first year entering students across all faculties offered at Tshwane University of Technology and this will attach some form of accreditation to them to encourage participation.

The purpose of this research project was to examine theories of learning, theories of teaching, and theories of listening comprehension with a view to developing and testing a computer-enhanced listening comprehension system for English as a Foreign Language within the Thai university system. In addition to carrying out an in-depth literature review, factors contributing to difficulties in the listening process were also carefully examined in order to build a sound foundation for dealing with listening comprehension. A brief history and analysis of Computer Assisted Language Learning were presented together with a review of some computer programs with the aim of determining their characteristics. An Individualized CELL Listening Comprehension Program was then developed on the basis of four theoretical frameworks: the Constructivist approach, the need to use authentic spoken passages, reduction of cognitive load and response to learner differences. The system was then used by twenty students of Suranaree University of Technology (SUT), Thailand for a period of fifteen weeks. Students were volunteers from different proficiency levels. SUT midterm and final examinations were employed, in part, to observe the effect of the program on proficiency levels. The SUT examinations, which were usually in a multiple-choice format, tested students on minor details through short, simple conversations. These tests might not fit entirely within best practice for listening but they seem to be a common way of measuring listening development in several educational contexts. Pretests and posttests examining global ideas and specific details in written and multiple-choice formats were then developed so as to provide a more accurate gauge of improvement in listening skills. Log files were kept in order to scrutinize in detail students� interactions with the system. Questionnaire and interview techniques were applied to seek out students� attitudes towards the program. The results revealed that the participants performed better than their peers in the same proficiency levels in SUT midterm and final examinations although the difference was not at a statistically significant level. However, posttest scores were better than those of pretest at a statistically significant level in most aspects except in case of the global ideas. The log files revealed that all students tended to focus on the word level by attempting to understand and decode every word in the transcriptions. This fixation is likely to explain the low global ideas scores. Analysis was complicated by the fact that some students were not able to use the program frequently enough, usually because of unexpectedly heavy schedules. However, the data extracted through questionnaires and interviews showed that most students demonstrated a positive attitude towards the various features of the program and felt that use of the program had improved their listening skills. In addition to findings relating to the development of listening comprehension, the study revealed that the majority of students felt that they did not think listening comprehension and, more generally the study of English, was sufficiently important to spend time on. This interesting but shocking discovery needs to be attended to immediately as it may have a strong effect on how Thai students prioritize their learning of English, and how this may impact on the levels of proficiency which they might subsequently attain.